JPH0932479A - Shield tunnel excavation method and shield excavator - Google Patents

Abstract

(57) Abstract: [PROBLEMS] To obtain a shield tunnel excavation method and a shield machine capable of continuously and excavating an intermediate tunnel between a pair of tunnels easily and safely at low cost in the shortest possible time. SOLUTION: In a shield tunnel excavation method in which multiple shield tunnels 13, 34, 35 are built from a starting shaft 10 to a terminating shaft 11, a pair of tunnels 34, 35 and a tunnel 13 in the middle of the tunnel are formed at the center. The shield cutter 12 has a rotary cutter 20 in a part and a cutter disk having a rotating / oscillating cutter 36 in a circumferential part.
After excavating the intermediate tunnel 13 by rotating 20 and the rotating / oscillating cutter 36, the shield machine 12 is turned in the terminal shaft 11 and the rotary cutter 20 of the cutter disk is rotated along this tunnel 13 to rotate / rotate. One of the tunnels 34 is excavated while rocking the rocking cutter 36, the shield machine 12 is turned again at the starting shaft 10 and the rotary cutter 20 is rotated. Excavate tunnel 35.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield tunnel excavation method for easily and economically constructing a tunnel by a shield construction method and a shield machine used in the construction method.

[0002]

2. Description of the Related Art When a pair of tunnels (1) and (2) are built in parallel, such as an up line and a down line, a new station is built at the midpoint between the stations. Sometimes,
As shown in Fig.2, the starting shaft (3) and terminal shaft (4) are installed at the beginning and end of the new station, and both tunnels (1)
Due to the stability of the face when excavating between (2), as shown in Fig. 25, the ground (G) above both tunnels (1) and (2)
After the improvement, the roof shield excavator (6) excavates only the upper part of both tunnels by a method called roof shield, and after covering the ceiling part, mechanically or artificially the lower side. After excavating, as shown in FIG. 27, the center pillar was erected and the floor was lined to construct the station.

When a new tunnel is built and a station is built at an appropriate place, a pair of starting shafts (3) and terminal shafts (4) provided at the starting and terminating ends of the station. Regarding the tunnels (1) and (2), a single shield machine was turned around the starting shaft (3) and the terminal shaft (4) to excavate a pair of tunnels (1) (2), and then lining the tunnel. Build or build a pair of tunnels with a shield machine (1) (2)
They were excavated separately, lined and built. When constructing the station between the starting shaft (3) and the terminal shaft (4), a triple tunnel shield machine (5) as shown in Fig. 26 is used to construct an intermediate tunnel as shown in Fig. 27. Excavation and lining of (7) were being carried out.

[0004]

However, when a new station is built between the existing tunnels by the above-mentioned conventional method,
Not only does the cost increase due to the use of soil stabilization chemicals and the lengthening of the construction period because soil improvement and pneumatic construction methods are required to stabilize the ground above both tunnels between the tip and end shafts. According to the roof shield method, the excavation above and below the tunnels is carried out separately, so there is a problem in workability such as rolling, the construction period becomes longer, the cost becomes higher, and the construction safety But there was a problem that I was worried. In addition, if a triple shield machine is used, the shield machine itself is expensive and it takes a long time to assemble and dismantle it, so it is a construction method for short sections such as station construction. There is also a problem that it is not preferable from the viewpoint of cost and construction period. The present invention solves such a problem and is a simple and safe shield tunnel excavation method capable of continuously excavating a tunnel between stations at low cost in the shortest possible time, and a shield machine used in this method. Is intended to provide.

[0005]

To this end, according to the present invention, a shield tunnel is constructed by a shield tunneling method in which an intermediate tunnel communicating between the two tunnels is provided between a pair of left and right existing tunnels. In the construction method, from one of the tip vertical shaft and the terminal vertical shaft provided at the start end and the end end of the intermediate tunnel toward the other, between the two tunnels, a rotary cutter is provided at the central part, and both are provided at the outer circumferential part. A rotary cutter for a cutter disk in a shield machine with a cutter disk having an oscillating cutter whose upper and lower outer circumferential parts except the part facing the tunnel side are driven independently of the rotary cutter (20) in the central part. Rotate and excavate the swing cutter at the same time while swinging to make both tunnels communicate with each other. In the multiple shield tunnel construction method in which the intermediate tunnel that connects the tunnels is constructed by the shield construction method, from one of the start shaft and the end shaft provided at the start and end of the intermediate tunnel to the other, first The middle tunnel has a rotary cutter in the center, and the upper and lower outer circumferences of the outer circumference are independent of the rotary cutter (20) in the center except for the rotation and the parts facing both tunnel sides. Digging while rotating the rotating cutter and rotating cutter of the cutter disk in a shield machine with a cutter disk having a rotating and oscillating cutter that can be modified for rotation and oscillating, After that, the shield machine was turned in the other shaft that the shield machine reached, and a pair of tunnels on the left and right side were excavated along this intermediate tunnel. Rotate the rotary cutter of the cutter disk, and oscillate one of the two while swinging the oscillating rotation / oscillating cutter, and further re-turn the shield excavator at the one shaft reached by the shield excavator, and again A pair of left and right tunnels along the middle tunnel are rotated while the rotary cutter of the cutter disk is rotated to excavate while swinging the rotating and swinging cutters for swinging, and multiple shields are produced by one shield excavator. Type shield tunnel construction, and the multiple tunnel type shield tunnel construction method in which the intermediate tunnel that connects both tunnels is constructed by the shield construction method between the pair of left and right tunnels. From one of the starting shaft and the terminating shaft provided at the end to the other, first one of both tunnels, the rotary cutter in the center part It has the outer circumference, and the upper and lower outer circumferences of the outer circumference excluding the area facing both tunnel sides are driven independently of the rotary cutter (20) in the central part. Rotating the cutter disk in a shield machine with a cutter disk that has a rotating / oscillating cutter and excavating while rotating the rotating / oscillating cutter for rotation, and then at the other shaft reached by the shield machine. The shield excavator is turned around, the intermediate tunnel is rotated along this one excavated tunnel, the rotary cutter of the cutter disk is rotated, and the excavation is performed while swinging the swinging and swinging cutter for swinging. At one of the shafts, the shield machine was re-inverted, and the other one of the pair of left and right tunnels was cut along the middle tunnel again. To rotate the rotary cutter of KU, and to excavate while swinging the oscillating and oscillating cutter to construct a multiple shield tunnel with one shield excavator. In the multiple shield tunnel construction method in which the intermediate tunnel that connects both tunnels is constructed by the shield construction method, in the start and end shafts of the start and end of the intermediate tunnel from one to the other , A pair of left and right tunnels have been excavated separately to one of the shafts, and a rotating cutter is provided in the central part, and the outer peripheral part of the upper and lower outer peripheral parts excluding the part facing the tunnel and both tunnel sides. Of a shield machine equipped with a cutter disk having a rotating and swinging cutter that can be modified for rotation and swinging driven independently of the rotating cutter (20) in the center With one shield excavator, one of the intermediate tunnel or the pair of tunnels between the shafts is excavated while rotating the rotary cutter of the cutter disk and the rotating / oscillating cutter for rotation, and the other shield excavator. Machine rotating one of the pair of tunnels between the shafts or one of the intermediate tunnels along the preceding excavated tunnel by rotating the rotary cutter of the cutter disk and swinging the rotary / swing cutter for rocking. Digging and turning one of the shield excavators that reached the other of the shafts in the other shaft to rotate the other of the pair of tunnels along the leading excavated intermediate tunnel to rotate the rotary cutter of the cutter disc , And constructing a multiple-type shield tunnel by excavating while swinging a swinging / swinging cutter for swinging.

In such a shield tunnel excavation method, a trailing excavation tunnel that is excavated along a leading excavation tunnel is formed along a guide provided in a segment of the leading excavation tunnel. It is preferable that the shield excavator for excavation is guided so that the trailing excavation tunnel is excavated.

The shield cutter disk of the shield machine for excavating the shield tunnel used in the above-mentioned shield tunnel excavation method is a shield cutter disk in which the portion facing the preceding excavation tunnel is removable. Or, except for the part facing the preceding excavation tunnel, the upper and lower outer circumferential parts consist of a rotary cutter that is driven independently of the rotary cutter (20) in the central part and a shield cutter disk that can be replaced. It is preferable.

[0008]

According to the invention of claim 1, the excavation of the intermediate tunnel which connects both tunnels between the start shaft and the end shaft by connecting both tunnels by rotating the rotary cutter of the cutter disk The opposite side surfaces of the tunnel are excavated in a circular shape, and the upper and lower outer circumferential portions of the rotary cutter except for the opposing portions of both tunnels are excavated simultaneously by swinging the swing cutters. In the excavation process, excavation communication is established.

According to the second aspect of the present invention, the intermediate section tunnel of the multiple type tunnel consisting of a pair of tunnels between the start shaft and the end shaft and the intermediate tunnel connecting the both tunnels is a rotary cutter of a cutter disk. It is excavated in a circle by rotating the disc and the rotating / swinging cutter for rotation at the same time, and after reaching the other from one of the starting shaft and the terminal shaft, the shield machine is turned in the other shaft,
The rotary cutter of the cutter disk was rotated along this excavated intermediate tunnel, and the rotary / oscillating cutter was converted into a rotary / oscillating cutter for rocking and rocked, thereby communicating with the intermediate tunnel. One of the pair of tunnels is excavated. This shield machine is re-inverted in the one shaft reached by the shield machine excavating this one tunnel, and again the rotary cutter of the cutter disk is rotated along the above-mentioned intermediate tunnel to rotate for swinging.
By digging while swinging the swing cutter,
The other of the pair of right and left tunnels is excavated, and a multi-shield tunnel is constructed in which each tunnel is connected by one shield excavator.

According to the invention of claim 3, a multiple tunnel shield tunnel is constructed by the same method as the method of the invention of claim 2, but instead of the intermediate tunnel in the invention of claim 2, a pair of tunnels is constructed. Rotate the cutter disk of the shield machine to dig a circular tunnel first, and then rotate the shield machine in the shaft that reaches the next shaft to rotate and rock the cutter disk. After remodeling into a rotary / oscillating cutter, rotate the rotary cutter along one of the previously excavated tunnels, excavate the intermediate tunnel while swinging the rotary / oscillating cutter, and then reach further. The shield machine is re-rotated in the other shaft to rotate the rotary cutter along the intermediate tunnel, and while swinging the rocking and rocking cutter for rocking, the other ton Shield tunnel multiple-type is construction by a single shield machine by excavation Le.

According to the invention of claim 4, one shield excavator is one of the shield excavators which has independently excavated a pair of left and right tunnels from one of the start shaft and the end shaft to the other, to one of the shafts. 1 between tunnels or shafts
One of the pair of tunnels is made to excavate while rotating the rotary cutter of the cutter disk and the rotating / oscillating cutter for rotation, and the other shield excavator is one of the pair of tunnels between the shafts or the intermediate tunnel. Rotate the rotary cutter of the cutter disk along one of the preceding excavated tunnels, and proceed with excavation while swinging the modified rotary / oscillating cutter for swing, and reach the other side of the shaft Of one of the pair of tunnels and the other of the pair of tunnels is rotated in the vertical shaft of the other to rotate the rotary cutter of the cutter disc along the preceding excavated intermediate tunnel, and the rotary / swing cutter modified for swinging. By digging while rocking, a multiple shield tunnel is constructed by a plurality of shield excavators.

According to the fifth aspect of the present invention, the trailing excavation tunnel excavated along the tunnel excavated in advance follows the excavation shield of the trailing excavation tunnel along the guide provided in the segment of the preceding excavation tunnel. The excavator is guided and the trailing excavation tunnel is excavated, and each tunnel is built in parallel without considering construction problems such as rolling, pitching, or yawing between the leading excavation tunnel and the trailing excavation tunnel. .

According to the invention of claim 6, in the cutter disk of the shield machine, the rotary / oscillating cutter is detachable at a portion facing the preceding excavation tunnel. Partial modification is sufficient to change to.

According to the invention of claim 7, the rotary / swing cutter is replaceable with a rotary / swing cutter in which upper and lower outer circumferential parts except the part facing the preceding excavation tunnel swing. The rotation / swing cutter can be changed to a rotation / swing cutter for swinging which has an appropriate outer diameter.

[0015]

Embodiments of the shield tunnel excavation method and the shield machine according to the present invention will be described below with reference to the drawings. [Embodiment 1] (FIGS. 1 to 9) This embodiment shows a case where an intermediate tunnel is built between existing tunnels when a station is to be built between a pair of tunnels in advance. FIG. 1 shows a state in which a shield machine is arranged in a start shaft and a start shaft of a terminal shaft, which are excavated and formed at the start and end positions of the station, when a station is built between a pair of existing tunnels. Figure, Figure 2
1 is an explanatory view showing a state in which the shield machine in FIG. 1 is excavating an intermediate tunnel, and FIG. 3 is a view showing a segment having a pillar and a guide groove formed on opposite sides of both tunnels. FIG. 4 is a cross-sectional view, FIG. 4 is an explanatory view showing a state in which a middle part tunnel is excavated by a cutter disk having a rotary cutter in the center part and a swinging cutter in the circumferential part, and FIG. FIG. 6 is an explanatory view showing the state, FIG. 6 is a front view of the cutter disk, and FIG.
Is a side sectional view when the rotary cutter and the swing cutter of the cutter disc are arranged offset from each other, and FIG. 8 is a side sectional view when the rotary cutter and the swing cutter of the cutter disc are arranged on the same plane. FIG. 9 is an explanatory view showing a state in which an intermediate tunnel is excavated by another embodiment of the swing cutter of the cutter disk.

When a station is to be built between a pair of tunnels (8) (9) in advance, each tunnel (8) (9) has a structure shown in FIG.
As shown in Fig. 3, the middle pillars (14) and (15) are erected on the side walls of the tunnels (8) and (9) facing each other, and the guide grooves (16) are provided in the upper segments (18) and (19). ) (17) is used, and the arcuate surfaces on the outside of the central pillars (14) (15), that is, the opposing surfaces (24) (25) of both tunnels (8) (9) are shielded at a later date. In order to make it easy to excavate with a machine, it is filled with a segment or backfill material made of low-strength concrete and then lined.

A pair of tunnels having such a structure
(8) To excavate an intermediate tunnel (13) for building a station between (9), excavate a starting shaft (10) and a terminal shaft (11) at the start and end of the station, Assemble the shield machine (12) in the vertical shaft (10). This shield machine (12)
As shown in FIG. 6, the central part has a rotary cutter (20) that rotates in one direction, and the outer circumference part of the upper and lower parts excluding the parts facing both tunnels (8) and (9) sides. A cutter disk having an oscillating cutter (21) whose outer circumferential portion oscillates is provided, and guides of the segments (18) and (19) are provided on both upper sides of the body (26) of the shield machine. Groove (16) (1
Protrusion that engages with (7) and can move along the guide grooves (16) (17)
(27) (28) are provided. The rocking cutter (21) has a cutter bit (22) on the outer edge above the rocking cutter (21).
When 1) is rocked, it is rocked to the upper half position of the pair of tunnel pillars (14) (15), and the cutter bit (23) at the lower outer edge is rocking cutter (21). When the rocking is performed, the rocking to the position of the lower half of the center pillars (14, 15) of the pair of tunnels is used. Rotary cutter for cutter disc
The (20) and the oscillating cutter (21) may be displaced forward and backward as shown in FIG. 7 or may be flush with each other as shown in FIG. In the figure, (29) is a drive motor for the rotary cutter (20), (30) is a swing motor for the swing cutter (21), and the swing cutter (21) swings through a rack and a pinion (not shown). It is connected to the drive motor (30) and is rocked by the rotation and reversal of the rocking motor (30).

The protrusions (27) and (28) of the body (26) of the shield machine (12) constructed and assembled in this manner are attached to the segments (18) and (19) of both tunnels (8) and (9). If the drive motor (29) of the rotary cutter (20) of the cutter disk and the swing motor (30) of the swing cutter (21) are rotated, the rotary cutter (16) In 20), the center axis between the outer circumferences of both tunnels (8) and (9) was excavated circularly, and the rocking cutter (21)
Above and below both tunnels (8) and (9), and both central columns
Since excavation will be made between (14) and (15), the middle pillars (14a) and (15a) of the intermediate tunnel (13) will be constructed according to the conventional method, and both tunnels (8) and (9) will be constructed. ) Segment above and below
(31) (32) should be lined and the platform (33) should be built.

Here, the shield machine (12) is not limited to the one having the above-mentioned structure, and as shown in FIG. 9, for example, the cutter bits (22) (23) of the swing cutter (21) of the cutter disk. ) Is excavated to the outer peripheral edges of both tunnels (8) and (9), the swing cutter (21) is swung to excavate between both tunnels (8) and (9), and both tunnels (8) ( The opposing surfaces (24) (25) of 9) may be excavated by other means. In this embodiment, in order to excavate the intermediate tunnel (13) by closely adhering the shield machine (12) to both tunnels (8) (9), both sides above the trunk (26) of the shield machine (12). Segment (18)
(19) is engaged with the guide grooves (16) (17), provided with protrusions (27) (28) movable along the guide grooves (16) (17), This close contact structure is not always necessary, and is not limited to the upper sides of the trunk (26) of the shield machine (12),
Obviously, it is also possible to adopt a vertical contact structure in which projections are provided on both lower sides and guide grooves are also provided on the corresponding segments.

Unlike the above, when constructing an intermediate tunnel between existing tunnels when there was no plan to build a station between a pair of tunnels, there is no middle pillar (14) (15). , Shield machine (12) body along both tunnels (8) (9), rotate the rotary cutter (20) of the cutter disk, the cutter bits (22) (23) are both tunnels (8) (9) The rocking cutter (21) having a shape for digging up to the outer peripheral edge may be rocked to advance.

[Embodiment 2] (FIGS. 10 to 21) In this embodiment, a pair of tunnels are newly constructed, and a multiple tunnel tunnel is constructed when a station is constructed between the pair of tunnels. The case where it is built by one shield machine is shown. FIG. 10 to FIG. 12 explain the excavation sequence of the multiple tunnel between the start shaft and the end shaft formed at the start and end positions of the station when a station is built between a pair of new tunnels. Fig. 13 is a front view of a cutter disk having a rotary cutter in the center and a rotating / swinging cutter for rotation on the outer periphery thereof. Fig. 14 is an excavation using the cutter disk of Fig. 13 on both sides. Fig. 15 is a cross-sectional view of the intermediate tunnel in which the inner pillar is built and the guide groove is formed in the segment on the inner pillar, and the inner tunnel is lined up. 16 is a front view of the cutter disk when modified to an oscillating cutter, FIG. 16 is a front view showing a state where the cutter disk of FIG. 15 is closely attached to the intermediate tunnel, and FIG. 17 is an excavation using the cutter disk of FIG. 18 is a cross-sectional view of the one tunnel and the intermediate tunnel that have been lined, and FIG. 18 is a multi-row consisting of the other tunnel that has been excavated using the cutter disk of FIG. 16, the intermediate tunnel, and one tunnel. Completed cross-section of die tunnel, FIGS.
One is a multiple tunnel type, one tunnel is excavated and lined first, then the middle tunnel is excavated and lined, and finally the other tunnel is excavated and lined to form a multiple type tunnel. It is sectional drawing which shows the state built.

A pair of tunnels (34) (35) is newly built, and an intermediate tunnel is provided between these pair of tunnels (34) (35).
When (13) is built and a station is built, the order of excavating multiple shield tunnels with one shield excavator (12) is to first dig and cover the intermediate tunnel (13). After excavating and lining one of both tunnels (34) and (35), or after excavating and lining one of both tunnels (34) and (35), digging and lining the intermediate tunnel (13) In some cases, the other tunnel may be excavated and lined. In some cases, a pair of tunnels (34) and (35) are alternately excavated and lined, and then an intermediate tunnel (13) is excavated and lined, which is described in the first embodiment. , Here, we are going to excavate the multiple tunnel, firstly the middle tunnel (13)
The case of excavating and lining one of each of the tunnels (34) and (35) after lining is described.

The pair of tunnels (34) and (35) are excavated and lined by a conventional method, but the section where the intermediate tunnel (13) for constructing the station is excavated, that is, the beginning and end of the station. A starting shaft (10) and a terminal shaft (11) are excavated and formed, and a new shield excavator (12) is assembled in the starting shaft (10) or it is excavated to the starting shaft (10). The cutter disk of the shield machine (12) is replaced. As shown in FIG. 13, the shield machine (12) has a rotary cutter (20) that rotates in one direction in the central portion, and a rotary cutter that can rotate and swing in its outer circumferential portion. A cutter disk having an oscillating cutter (36) is provided, and as shown in FIGS. 14 to 16 described later, similar to the first embodiment, the segments (37) (38) are provided on one upper side of the body portion. The guide groove (39) (40) engaged with the guide groove (39) (40) and provided with a protrusion (41) movable along the guide groove (39) (40) is used. The rotary / oscillating cutter (36) in the cutter disk is configured such that the rotary / oscillating cutter (36) for rotating can be modified to a rotary / oscillating cutter (46) for swinging or can be replaced. Is used and the rotation of the size according to the diameter of the tunnel to be excavated
An oscillating cutter (46) is used.

[0024] And, the rotation / oscillation cutter for this oscillation
As (46), as shown in FIG. 15 and FIG. 16, the cutter bit (4
2), when the swing cutter (36) is swung, it is swung to the upper half position of the center pillar (14a) (15a) of the tunnel, and at the lower outer edge, the cutter bit on the side of the preceding excavation tunnel. (43)
When the rocking cutter (36) is rocked, the middle pillar (1
4a) and (15a) are rocked to the lower half position, and at the outer edges above and below the rocking cutter (36), the cutter bits (44) (45) on the side opposite to the preceding tunnel rock. Cutter (36)
An oscillating cutter (46) that is rotated to a position on the line passing through the center of the rotating cutter (20) when the wrench rotates and reverses.
The one configured in is used. The arrangement of the front and rear surfaces of the rotary cutter (20) and the rotary / swing cutters (36) and (46) in the cutter disk and their respective drive mechanisms are the same as those used in the first embodiment.

In the shield machine (12) assembled in the starting shaft (10) as shown in FIG. 13, first, the rotary cutter (20) and the rotary / swing cutter (36) for rotation in the cutter disk are the same. Rotate in the direction to excavate the middle tunnel (13). As shown in FIG. 14, the intermediate tunnel (13) is provided with the middle pillars (14a) and (15a) standing on the side wall portions on the side facing the both tunnels (34) and (35), and the upper segment ( 37) (3
The guide groove (39) (40) is formed in 8) and the arc-shaped surface outside the center pillar (14a) (15a), that is, the surface (47) facing both tunnels (34) (35). (48) is filled with segments and backing material made of low-strength concrete so that it can be easily excavated later by the shield machine (12), and then lined.

When the shield machine (12) reaches the terminal shaft (11) and the intermediate tunnel (13) is built, the terminal shaft (11)
Inside the shield machine, turn the shield machine (12) upside down and replace or modify the rotating / oscillating cutter (36) for rotating the cutter disk with the rotating / oscillating cutter (46) for oscillation.
Insert the protrusion (41) provided on the trunk of (12) into the middle tunnel (13)
16 is inserted into the guide groove (39) provided in the segment (37) of the above, the rotary cutter disk (20) of the cutter disk is rotated, and the rotary / oscillating cutter (46) for rocking is rocked to be shown in FIG. As shown in Figure 17, one of the tunnels (34) is excavated along the middle tunnel (13), and this is lined and
Intermediate tunnel (13) and one tunnel as shown in
A tunnel with (34) is built.

When the shield machine (12) reaches the starting shaft (10), the shield machine (12) is inverted again inside the starting shaft (10) and installed on the body of the shield machine (12). Protrusion (4
Insert 1) into the guide groove (40) provided in the segment (38) of the intermediate tunnel (13), rotate the cutter disk (20) of the cutter disk, and rotate and rock the cutter (46) for rocking. As shown in Fig. 18, if the other tunnel (35) is excavated along the intermediate tunnel (13) and the lining is performed, as in the case of excavating one tunnel (34), Multiple tunnels are constructed by connecting the intermediate tunnel (13) and both tunnels (34) (35).

In this embodiment, when constructing a multiple-type tunnel, the intermediate tunnel (13) is first excavated and then the pair of tunnels (34) (35) is excavated. ,
As shown in FIG. 19 to FIG. 21, one of the pair of tunnels (34), (35) is excavated first, and then the intermediate tunnel (13)
Of course, it is possible to excavate one and then the other tunnel (35). In this case, excavation and lining are based on the above method.

[Embodiment 3] (FIGS. 22 to 25) In this embodiment, a pair of tunnels are newly constructed, and a multiple tunnel shield tunnel is constructed when a station is constructed between the pair of tunnels. , Shows the case of being built by multiple shield machines. The drawings show that when constructing a station between a pair of new tunnels (47) (48), there are multiple tunnels between the starting shaft (49) and the terminal shaft (50) that have been excavated at the start and end positions of the station. FIG. 22 is an explanatory diagram for explaining the excavation sequence of the continuous shield tunnel. In FIG. 22, a shield shaft excavator (51) (52) that has excavated a pair of tunnels (51) (52) has a start shaft (49) first. The shield machine (51) that arrived excavates the intermediate tunnel (13), and the shield machine (52) that later reached the start shaft (49) is one tunnel (48) along the intermediate tunnel (13). FIG. 23 is an explanatory view when excavating the tunnel, and FIG. 23 is an explanatory view when the shield shield machine (52) of the latter arrival in FIG. 22 is reversed at the terminal shaft (50) and the other tunnel (47) is excavated. is there.

The pair of tunnels (47) and (48) are excavated and lined by conventional shield excavators (51) and (52), respectively. ) Is excavated, that is, a starting shaft (49) and a terminal shaft (50) are formed at the beginning and end of the station. And a shield machine (51) (52) that has excavated a pair of tunnels (47) (48)
Inside, the shield machine (51) that reached the starting shaft (49) first
Is moved to the excavation position of the intermediate tunnel (13), and the shield tunnel machine (51) excavates the intermediate tunnel (13) and lining it. In the shield machine (52) which later reached the starting shaft (49), the cutter disk had a pair of tunnels (34) (35) along the intermediate tunnel (13) in Example 2.
One of the pair of tunnels (47) (48) is excavated and lined, with one of the tunnels (47) (48) being replaced or modified with a cutter disk similar to the one used when excavating.

The intermediate tunnel (1 that reached the terminal shaft (50)
The preceding shield machine (51) that has been excavating 3) is either immediately dismantled in the terminal shaft (50), or further terminal shaft (50).
Used to excavate one of the tunnels (47) (48) beyond.
The other shield machine (52) excavating one tunnel (48) that later reached the terminal shaft (50) is the terminal shaft (50).
Inside the tunnel, the direction is turned and the tunnel is moved to the excavation position of the other tunnel (47), and the shield machine (52) excavates the other tunnel (47) along the middle tunnel (13) again and covers it. The other tunnel (47) is constructed and the multiple shield tunnels (13) (47) (48) are constructed. The construction of the shield cutter of the shield machine and the construction method of the tunnels (47) (48) by the shield machine used in this embodiment are the same as those in the second embodiment, and the construction method is the same. To be done. In this embodiment, when excavating multiple shield tunnels (13) (47) (48),
Among the pair of shield machines (51) (52), it is shown that one shield machine excavates the intermediate tunnel (13) first, but one pair of tunnels (47) (48) first It is self-evident that the intermediate tunnel (13) may be excavated after excavating one of them, and the excavation order can be appropriately selected. In each of the above-mentioned embodiments, the shield cutter is shown as the shield cutter, but the spoke cutter can be freely used. Further, the rotating / oscillating cutter does not necessarily have to be exchanged or modified for rotating and swinging, and if necessary, rotating can be used for swinging, and swinging can be used for rotating.

[0032]

According to the invention of claim 1, even when a new station is built between a pair of existing tunnels, unlike the conventional roof shield construction method, the ground improvement and air pressure above both tunnels are improved. There is no need to adopt a construction method, and as in the case of excavating a normal shield tunnel, one shield excavator can be used for excavation, followed by lining, which can greatly reduce the construction period and cost.

According to the inventions of claims 2 and 3,
A multiple tunnel shield tunnel can be excavated simply by reciprocating between the start shaft and the end shaft by replacing or modifying the rotary / swing cutter on the concentric circle of the cutter disk of the shield machine. It is possible to excavate with a single type shield excavator without using the shield excavator, which helps reduce the cost of the shield excavator itself and the cost and period required for assembling the shield excavator.
Considering the construction period for reciprocating excavation with one shield machine, shortening the construction period and reducing the cost is a major method for constructing a short section, such as building a station.

According to the invention of claim 4, a pair of shield excavators which have built a pair of tunnels are modified or replaced in the shield shaft cutter in the starting shaft or the terminal shaft of the section where the station is built. It is possible to excavate multiple tunnels with only, because there is no need to newly use an expensive dedicated multiple shield excavator to build a multiple tunnel or assemble it in the shaft, There is an advantage that the excavation of the station part is easy and inexpensive, and can be excavated in a short period of time.

According to the fifth aspect of the present invention, the shield machine of the trailing excavation tunnel is dug along the guide provided in the segment of the leading excavation tunnel. Therefore, the leading excavation tunnel and the trailing excavation tunnel are accurate. Moreover, it is surely excavated in parallel, and there is no problem in workability such as rolling.

According to the inventions of claims 6 and 7,
Depending on the excavation form of the shield tunnel, it can be done by simply modifying the cutter disk partially or replacing it partly, so it is remodeling significantly compared to replacing the entire cutter disk or the shield machine itself. And the assembly time can be shortened, and the cost required for them can be reduced.

[Brief description of drawings]

Figure 1: When building a station between a pair of existing tunnels,
Starting shafts excavated at the beginning and end of the station,
It is an explanatory view showing an example of the present invention showing the state where a shield machine is arranged in the starting shaft of the terminal shaft.

FIG. 2 is an explanatory view showing a state in which the shield machine in FIG. 1 is excavating an intermediate tunnel.

FIG. 3 is a cross-sectional view of both tunnels showing a central pillar and a segment having a guide groove formed on opposite side surfaces of the both tunnels.

FIG. 4 is an explanatory view showing a state of excavating an intermediate tunnel with a cutter disk having a rotary cutter in a central portion and a swinging cutter in a circumferential portion thereof.

FIG. 5 is an explanatory view showing a state of the built intermediate tunnel.

FIG. 6 is a front view of a cutter disk.

FIG. 7 is a side sectional view when the rotary cutter and the swing cutter of the cutter disk are arranged so as to be displaced back and forth.

FIG. 8 is a side sectional view when a rotary cutter and an oscillating cutter of a cutter disk are arranged on the same plane.

FIG. 9 is an explanatory view showing a state in which an intermediate tunnel is excavated by another embodiment of the swing cutter of the cutter disk.

FIG. 10 is a view for explaining the excavation sequence of a multiple tunnel between the start shaft and the end shaft which are excavated at the start and end positions of the station when a station is built between a pair of new tunnels. It is explanatory drawing which shows the direction which a shield machine excavates an intermediate part tunnel.

FIG. 11 is an explanatory diagram when the shield machine in FIG. 10 is turned around in the terminal shaft to excavate one of the pair of tunnels.

FIG. 12 is an explanatory diagram when the shield machine in FIG. 11 is turned around in the starting shaft and excavating the other of the pair of tunnels.

FIG. 13 is a front view of a cutter disk having a rotary cutter in the center and a rotary / swing cutter for rotation on the outer periphery thereof.

FIG. 14 is an excavation using the cutter disc of FIG.
It is a sectional view of an intermediate section tunnel where a middle pillar was built on both sides and a guide groove was formed in a segment on the middle pillar.

[Figure 15] Rotating / swinging cutter of the cutter disk
It is a front view of a cutter disc when it is remodeled from a rotating cutter to a swinging and swinging cutter.

16 is a front view showing a state in which the cutter disk of FIG. 15 is brought into close contact with the intermediate tunnel.

17 is an excavation using the cutter disc of FIG. 16,
It is sectional drawing of one tunnel and the intermediate part tunnel which were lined.

FIG. 18 is an excavation using the cutter disc of FIG.
It is sectional drawing which shows the completed state of the multiple tunnel which consists of the other tunnel which was lined up, the intermediate part tunnel, and one tunnel.

FIG. 19 is a cross-sectional view showing a state in which one of the multiple tunnels has been excavated and lined first.

FIG. 20 is a cross-sectional view showing a state in which, in a multiple tunnel, one tunnel is excavated and lined first, and then an intermediate tunnel is excavated and lined.

FIG. 21: In a multiple tunnel, one tunnel was excavated and lined first, and then an intermediate tunnel was excavated and lined.
FIG. 7 is a cross-sectional view showing a completed state of the multiple tunnel in which the other tunnel is finally excavated and lined.

FIG. 22: Among shield excavators that have excavated a pair of tunnels, a shield excavator that first arrives at the starting shaft is excavating an intermediate tunnel, and a shield excavator that later arrives at the starting shaft is along the intermediate tunnel. It is explanatory drawing at the time of excavating one tunnel.

FIG. 23 is an explanatory diagram when the trailing shield machine in FIG. 22 is reversed at the terminal shaft to excavate the other tunnel.

FIG. 24 is an explanatory diagram of a case where a multiple tunnel between a starting shaft and a terminal shaft formed by excavation at the start and end positions of a station is excavated by a conventional method when a station is built between a pair of tunnels. Is.

FIG. 25 is an explanatory diagram of a conventional roof shield construction method.

FIG. 26 is a front view of a cutter disk of a conventional triple shield machine.

FIG. 27 is a sectional view of a multiple tunnel constructed by a conventional roof shield method.

[Explanation of symbols]

 8, 9, 34, 35, 47, 48: Tunnel 10, 49: Starting shaft 11, 50: Terminal shaft 12, 51, 52: Shield machine 13: Middle tunnel 16, 17, 39, 40: Guide groove ( Guide) 18, 19, 37, 38: Segment 20: Rotating cutter 21: Swiveling cutter 36: Rotating / swinging cutter for rotation 46: Rotating / swinging cutter for swinging

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ikuo Fujiki 3-19-6 Higashi-Ueno, Taito-ku, Tokyo Inside the Teito High Speed Transportation Corps (72) Kenji Yonejima 3-19-6 Higashi-Ueno, Taito-ku, Tokyo No. 7 inside the Teito High Speed Transportation Company (72) Yasushi Muramatsu 3-19-6 Higashi Ueno, Taito-ku, Tokyo Inside the Teito High Speed Transportation Company (72) Kenjiro Numasuzawa 3-19-6 Higashiueno, Taito-ku, Tokyo No. Teito High Speed Transportation Company (72) Inventor Sadakawa Sadakawa 5-5-5 Akasaka, Minato-ku, Tokyo Metro Development Co., Ltd.

Claims (7)

[Claims] [Claim 1] Between a pair of tunnels (8) and (9) on either side of existing or preceding excavation, an intermediate tunnel (13) that connects both tunnels (8) and (9) is constructed by a shield construction method. In the shield tunnel construction method to be used, the intermediate tunnel (13)
Starting shaft (10) and terminal shaft provided at the beginning and end of the
(11) From one to the other, between the two tunnels (8) and (9) has a rotary cutter (20) in the central part, and both tunnels (8) and (9) side in the outer circumferential part. Cutter disk in a shield machine (12) equipped with a cutter disk having an oscillating cutter (21) whose upper and lower outer circumferential parts except the part facing the The shield tunnel excavation method characterized in that the rotary cutter (20) is rotated, and the rocking cutter (21) is rocked so that both tunnels (8) and (9) communicate with each other at the same time. 2. A multi-joint shield tunnel in which an intermediate tunnel (13) communicating between the tunnels (34, 35) is constructed by a shield construction method between a pair of right and left tunnels (34, 35). In the construction method, one of the starting shaft (10) and the terminal shaft (11) at the beginning and end of the intermediate tunnel (13) goes from one (10) to the other (11) first, and then the intermediate tunnel (13). ) Has a rotary cutter (20) in the central part, and the outer peripheral part of the rotary cutter (20) rotates and the upper and lower outer peripheral parts except the part facing the both tunnels (34) (35) rotate in the central part. A rotary cutter (20) for a cutter disk in a shield machine (12) equipped with a cutter disk having a rotary and rocking cutter (36) that can be modified independently for rotation and rocking, which is driven independently of the cutter (20). Digging while rotating the rotating and swinging cutter (36) for rotation, then the shield machine (12) arrived Square of the vertical shaft (11) is turning the shield machine (12), the excavated intermediate portion tunnel pair of left and right along the (13) tunnel (34)
Rotate one side (34) of (35) to the rotary cutter (2
0) is rotated, the rocking and rocking cutter (36) for rocking is rocked to advance, and the shield machine (12) is re-installed at one shaft (10) reached by the shield machine (12). Rotate again, and again rotate the other side (35) of the pair of left and right tunnels (34), (35) along the intermediate section tunnel (13) by rotating the rotary cutter (20) of the cutter disc to rotate / swing for swinging. Moving cutter
A shield tunnel excavation method characterized in that a multi-shield tunnel is constructed by one shield excavator (12) by rocking (36). 3. A multi-joint shield tunnel in which an intermediate tunnel (13) communicating between both tunnels (34) (35) is constructed by a shield construction method between a pair of left and right tunnels (34) (35). In the construction method, from the one end (10) of the start shaft (10) and the end shaft (11) provided at the start and end of the intermediate tunnel (13) to the other (11), both tunnels (34) One side of (35) (34)
Has a rotary cutter (20) in the center part, and the outer cutter part of the upper and lower parts of the outer circumference except the part facing the tunnels (34) and (35) on the outer circumference part is the center part of the rotary cutter. (20)
Rotation that can be independently driven and rotation that can be modified for swinging
A shield excavator (12) equipped with a cutter disc having an oscillating cutter (36) excavates while rotating the cutter disc rotating cutter (20) and the rotating / oscillating cutter (36), and then the shield. The shield machine (12) is turned in the other shaft (11) reached by the machine (12), and the intermediate tunnel (13) is cut along this one tunnel (34) that was excavated. (20) is rotated, the rocking / rocking cutter (36) for rocking is rocked to advance, and the shield machine (12) is moved to the vertical shaft (10) to reach the shield machine (12). Re-turn around, and again along the middle tunnel (13), a pair of left and right tunnels (34) (3
Rotate the other side (35) of 5) to the rotary cutter (20) of the cutter disk.
Shield tunnel excavation characterized by rotating multiple slabs and oscillating a swinging / swing cutter (36) while swaying to construct a multiple shield tunnel with one shield machine (12). Construction method. 4. A multi-joint shield tunnel in which an intermediate tunnel (13) communicating between both tunnels (47) (48) is constructed by a shield construction method between a pair of left and right tunnels (47) (48). In the construction method, the vertical shafts (49) and (50) from one (49) of the starting shaft (49) and the terminal shaft (50) at the beginning and end of the intermediate tunnel (13) toward the other (50) Left and right 1 to one (49)
A pair of tunnels (47) (48) are excavated separately, and a rotary cutter (20) is provided in the central part, except for the outer circumferential part and the parts facing both tunnels (47) (48) side. The upper and lower outer circumferential parts are driven independently of the rotary cutter (20) in the central part and can be modified for rotation and rocking.
Shield machine (5 with a cutter disk with 6)
1) One of the shield excavators (52) in (52)
(13) or one of the pair of tunnels (47) (48) (47) between the shafts (49) (50), the rotary cutter (20) of the cutter disk and the rotary / swing cutter for rotation. (36) is made to rotate while rotating, and the other shield excavator (52) is used for shaft (49) (5
Rotate the rotating cutter (20) of the cutter disc along one of the tunnels (47) (48) between one (47) or the middle tunnel (13) along the preceding excavated tunnel. , The shield excavator (5) that reached the other side (50) of the vertical shaft by excavating while swinging the swinging and swinging cutter (36) for swinging.
1) Turn one of the (52) inside the other shaft (50) to move the other pair (48) of the pair of tunnels (47) (48) along the preceding excavated intermediate tunnel (13). A shield tunnel excavation method, characterized in that a rotary shield cutter (20) of a cutter disk is rotated, and a rotary / rocking cutter (36) for rocking is rocked to be excavated to construct a multiple tunnel shield tunnel. 5. The shield tunnel excavation method according to any one of claims 1 to 4, wherein the trailing excavation tunnel excavated along the previously excavated tunnel is a segment (18) (19) ( Guides provided on 39) and 40)
(16) (17) (39) (40) A shield tunnel excavation method characterized in that a shield excavator for excavation of a trailing excavation tunnel is guided to advance the trailing excavation tunnel. 6. The shield machine (12) (51) (52) according to any one of claims 2 to 4, wherein the cutter disk is rotated / rotated.
A shield machine for excavating a shield tunnel, wherein the oscillating cutters (36) (46) are composed of a shield cutter disk whose portion facing the preceding excavation tunnel is detachable. 7. The shield machine (12) (51) (52) according to any one of claims 2 to 4, wherein the cutter disk is rotated / rotated.
The oscillating cutter is a rotating and oscillating cutter (36) (46) for oscillating that is driven independently of the rotating cutter (20) whose upper and lower outer circumferences are the central part except the part facing the preceding excavation tunnel.
A shield machine for excavating a shield tunnel, which is composed of a shield cutter disk that can be freely replaced with.