JPH03212598A - Double shield excavator and construction method of excavating tunnel using the same - Google Patents

Abstract

PURPOSE:To easily free the direction in which a pair of parent and child shield excavators of the same performance and the same scale are disposed so as to change the pair of excavators in use into a form corresponding to the section of a tunnel by arranging the pair of shield excavators in parallel to each other in the direction of excavation, and connecting the excavators together to constitute a double shield excavator. CONSTITUTION:A pair of circular shield excavators of substantially the same performance and the same scale are arranged in parallel to each other in the direction of their axes as a parent machine 20 and a child machine 30 and are connected to each other in such a manner as freely sliding against each other by an engagement device 40 comprising an engagement member 23 and an engagement channel 33, to form a double shield excavator 10. The engagement device 40 is connected to a guide ring 50 provided around the parent machine 20 via a bearing 51 and rotating about the outer periphery of the device 40. The child machine 30 is rotated around the parent machine 20 so as to make their relative positions variable and make them separable from each other and when in engagement with each other the parent and child machines excavate two series of tunnels of large cross section into a desired shape, while when separated from each other the machines are each used as a single normal excavator.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a shield type excavator used for tunnel excavation work, and in particular to an excavator suitable for excavating a tunnel with a special cross section, and the use of the excavator. This relates to the shield method used in tunnel construction.

[Prior Art] Recently, with the increase in tunnel excavation work for subways in urban areas, the use of shield excavators that utilize the characteristics of a circular cross section has increased. Various types of shield excavators are used, and an example will be explained with reference to FIG. 2 and a cutter head 3 which is rotated along the inner circumference of the outer shell 1, and inside thereof is a drive device 4 for the cutter head 3, an agitator 5 for mixing excavation shear and muddy water, A circulation device 6 consisting of a mud feeding pipe and a mud draining pipe, a main push jack 7 that takes a reaction force to the rear segment S, and a segment S
Equipped with Erector-E etc.

The shield machine A shown in Fig. 6 has an outer shell 1 formed into a split shield type, with each cutting edge 8 leading, and the basic excavation propulsion mechanism is the same as the previous example. There is. Further, in this example, a steering device 9 is shown that controls the direction of excavation by applying a reaction force to the ground, and regarding the excavation shear,
A conveyor 5A of a lifting device is provided.

On the other hand, since construction work on double-track sections of subway lines and station buildings requires excavation of large cross sections, shield excavators that can handle larger excavation sections are used for horizontal excavators for station buildings and under narrow roads. Various types of large shield excavators are also used, but these shield excavators are designed and manufactured to suit the cross section of the tunnel each time. Met.

[Problem to be solved by the invention] However, in the large shield excavator as described above,
By forming the skin plate that forms the outer shell of the entire shield into a horizontally elongated or vertically elongated cross section, the required tunnel cross section is excavated, so the shape is fixed and the machine required for excavation is performance is limited. In addition, the cross section of a tunnel is most stable when it is circular, and since a given cross section is based on a curve made by superimposing circles, the shape of the subsequent segments becomes special, and each The shape of the shield excavator must be special.

Furthermore, in the case of a longitudinally elongated cross section, it is necessary to deal with disadvantages such as difficulty in controlling the attitude of the entire excavator.

[Means for Solving the Problems] In view of the above-mentioned circumstances, the present invention was created with a focus on eliminating the problems of the prior art, and it solves the basic problems of shield excavators. The configuration is that two shield excavators with basically the same performance and the same shape are formed independently, and these are arranged parallel to each other in the excavation direction as a parent-child pair to form a double shield excavator. The gist is what has been constructed. The technical means for this purpose is a compound system consisting of a parent machine and a child machine, in which a pair of shield excavators of substantially the same performance and size are arranged in parallel in the axial direction, and are connected to each other via a locking device. A shield excavator is constructed, and the master machine and slave machine are fitted and engaged by a movable engagement device that is slidable along the busbar of the outer shell, and the engagement device is attached to the front and rear intermediate portions of the master machine. The device is connected to a guide ring that is connected to the outer circumference of the outer shell of the device via a bearing, and rotates around the parent device when driven by the parent device, and rotates the child device around the axis of the parent device. Relative position can be changed,
It is constructed so that it can be separated, and specifically, it has a structure that is compatible with various types of shield excavators.It also has a structure that is compatible with various types of shield excavators. This is a characteristic feature. As a result, the direction in which the parent-child shield machine is connected can be easily freed, and it can not only be used in a shape that corresponds to the cross section of the tunnel, but also improve the construction method using the machine. .

[Embodiment] A double shield excavator of the present invention and a tunnel excavation method using the same will be explained in detail based on drawings showing preferred embodiments. FIG. 1 shows the whole shield excavator of the present invention in a partially cutaway perspective view, and FIG. 2 shows a schematic cross-section of its main section.

Reference numbers in FIGS. 5 and 6 are common to corresponding parts.

As shown in the figure, the dual shield excavator 10 of the present invention includes:
A pair of circular shield excavators each having the performance of an independent shield excavator and each having approximately the same scale are used as the master machine 20 and the other as the slave machine 30, and the master machine 2
0 and the child machine 30 are combined with their respective axes parallel to each other by the anchoring device 40 to form a double shield excavator. It is equipped with a guide ring 50 that rotates around it.

The locking device 40, which is a feature of the present invention, is attached to the outer shell 2 of the base unit 20.
An engaging member 23 protruding toward the handset 3o on one busbar 22 of the handset 30, and a busbar 32 of one outer shell 31 of the handset 30.
The engagement groove 33 is formed at the upper part of the outer shell 31 or at one position of the leading blade opening 2 to receive the engagement member 23 of the master machine 20. 23 into the engagement groove 33, the parent device 20 and the slave device 30 are coupled together. Here, the engagement groove 33 of the handset 30 is connected to the bus bar 3.
Corresponding to the unit length of the segment S used at the rear in the direction of 2, the length is, for example, 4 m. In addition to being able to slide, the engagement member 23 is normally attached to and disengaged from the handset 30 side so that the leading cutter heads 3 of both machines can be held in the same position and their relative movement is possible. An adjustment device 41 is provided which makes it possible to do this.

Next, as shown in FIG. 3, the engaging member 23 of the master unit 20 passes through the shell 31 of the slave unit 30, and its base end 24 is fixed to the guide ring 50. guide ring 50
is a circular band-shaped member rotatably attached to the main unit 20 via a bearing 51 provided between the outer shell 21 and the outer periphery of the main unit 20 at approximately the center of the outer shell 21 in the longitudinal direction. be. On its inner surface, there is a rack 52 along the entire circumference.
is integrally provided and engages with a pinion 53 that partially protrudes from the window hole 25 of the outer shell 21, and by transmitting the rotation of the internal drive device i54 to the pinion 53, the guide ring 50 is rotated. Therefore, due to the engagement between the engagement member 23 and the engagement groove 33, the slave unit 3 is rotated relative to the base unit 20.
0 rotates around its outer circumference.

Of course, the dual shield excavator 1o of the present invention is not limited to the above-mentioned embodiments, and for example, the anchoring device 4
o can be formed by exchanging the relationship between the engagement member and the engagement groove in the base unit 20 and the slave unit 30, and the cross-sectional shape of the engagement groove can also be changed. Further, in the means for engaging the engaging member 23 in the engaging groove 33, the head 26 of the engaging member 23 can be configured to be rotatable in the direction of the engaging groove 33 and in the direction perpendicular to the engaging groove 33, and , in the middle part 2
It is possible to make changes such as configuring it so that it can be separated and connected to and separated from it. Of course, upon separation, the purpose can be achieved even if the engaging member is cut.

Furthermore, when the dual shield excavator 10 is of the type shown in FIG. 6, and the master machine 20 and slave machine 30 need to operate basically upright.

As another embodiment, the slave unit 30 may also be provided with a guide ring 5°, and the anchoring device 40 may be engaged with the guide ring 50 of the slave unit 30 to operate independently. That is, the slave unit 30 can be provided with a drive device 54 and a transmission mechanism for the guide ring 5o as shown in FIG. 3, and configured to revolve around the base unit 20 and rotate in the opposite direction. .

[Function] Next, the function of the dual shield excavator of the present invention will be explained in terms of its configuration, and the tunnel excavation method carried out using this excavator will be explained.

The dual shield excavator 10 according to the present invention has the above-mentioned configuration, and the main machine 20 and slave machine 30 each function as an independent shield machine. Simultaneously excavate a tunnel with a circular cross section. In the meantime, even if there is a difference in the progress of both excavations due to ground conditions, the engagement groove 3 formed on the slave machine 3o
3 has a certain length and is provided with an adjustment device 41, so that it is possible to accommodate a difference in the progression of the segments S by about two rings. In addition, widening excavation of the constricted portion formed at the connecting portion of both shield excavators will be performed by other means as necessary.

For standard excavation as described above, the dual shield excavator 10 of the present invention can be modified by rotating the guide ring 50 and thus rotating the slave machine 30 around the master machine 20.
For example, as shown in Fig. 4, the parallel relationship from vertical to horizontal can be arbitrarily manipulated. This corresponds to a process that converts to Here, the main unit 20
Since the and slave unit 30 are relative, the standard for the base unit 20 is that the steering device 9 provided on the base unit 20 can be operated to utilize the resistance of the ground, and the operating posture of both is , regardless of the type of the master machine 20 and slave machine 30 that constitute the dual shield excavator 10.

FIG. 4 also shows the separation of the dual shield excavator 1o at a desired position on the route P. For example, by disengaging the engagement member 23 of the engagement device 40 and the engagement groove 33 at a point past the station building on the line P,
While the master machine 20 moves straight, the slave machine 30 can be curved to the side, and thereafter the shield excavator 20.30 excavates separately and independently by normal operation.

[Effects of the Invention] The dual shield excavator of the present invention and the tunnel excavation method using the same include a pair of shield excavators with substantially the same performance and the same size arranged in parallel in the axial direction and connected to each other via an anchoring device. A double shield excavator is constructed of a master machine and a slave machine coupled together, and the master machine and slave machine are fitted and engaged by a sliding engagement device along the generatrix of the outer shell, The anchoring device is installed around the outer periphery of the outer shell in the middle between the front and back of the main unit via a bearing, and is connected to a guide ring that rotates around the main unit due to drive from the main unit, and rotates around the axis of the main unit. This is a duplex shield excavator that rotates the slave machine to change the relative position of the slave machine to the master machine, and is separable, and the tunnel excavation method that uses it. When attached to the anchoring device and the guide ring attached to the main unit, it is suitable for excavating tunnels with two large cross sections in any shape vertically and horizontally, and when released, it can be used as a single ordinary shield excavator. can do. Therefore, if the site is restricted, such as under a narrow road, it is possible to construct it vertically and work along the road, and if soil cover with a superstructure is required, or
Not only can a single duplex shield excavator be used for a variety of tunnel construction methods, such as being able to use a horizontal position when constructing a station building, but also when separated at a branching point on a line, Each component shield excavator can build an individual tunnel.

In addition, since each component unit has an independent mechanism, the segments themselves are independent, and the structure is not complicated. , can be accommodated by conventional tapered segments. Furthermore, since each of the two shield excavators can excavate independently, even if one breaks down, the other can continue the work, and by adjusting the mutual positions, the two rings of the segment can advance. It has novel features such as being able to accommodate differences in work, and has the advantage of being able to handle large cross sections in many shield works, as well as flexibility in the type of excavator, making it suitable for general tunnel construction work. It has an extremely revolutionary effect.

[Brief explanation of drawings]

The drawings are for explaining the duplex shield excavator of the present invention and the tunnel excavation method using the same. Fig. 1 is a perspective view showing the entire duplex shield excavator with a part cut away, and Fig. 2 is a perspective view of the duplex shield excavator. Figure 3 is a schematic vertical sectional view, Figure 3 is a detailed sectional view illustrating the anchoring device and guide ring, and Figure 4 is a perspective view of the route illustrating rotation and separation in the construction method using the dual shield excavator of the present invention. 5 is a sectional view illustrating a general example of a shield excavator, and FIG. 6 is another embodiment of the shield excavator. 1... Outer shell, 2... Cutter, 3... Cutter head, 4... Cutter head drive device, 8... Blade mouth,
9... Steering device, 10... Dual shield excavator, 2
0...Main unit, 21.31...Outer shell, 22.32...Bus bar, 23...Engagement member, 24...Base end, 25...Window hole, 26...Head, 30 ... Slave unit, 33... Engagement groove, 40... Locking device, 41... Adjustment device, 50... Guide ring, 51... Hair ring, 52... Rank, 53... Pinion, 54 drive unit, S segment, P route.

Claims (5)

[Claims] (1) A pair of shield excavators with substantially the same performance and size are arranged in parallel in the axial direction and are connected to each other via a mooring device to form a compound shield excavator consisting of a master machine and a slave machine. The master unit and slave unit are fitted and engaged by a sliding engagement device along the generatrix of the outer shell, and the engagement device is fitted with a bearing on the outer periphery of the outer shell at an intermediate portion between the front and back of the parent unit. It is connected to a guide ring that rotates around the parent unit by drive from the parent unit, allowing the slave unit to rotate around the axis of the parent unit and change the relative position of the slave unit with respect to the parent unit. A dual shield excavator characterized by being separable. (2) The anchoring device is configured to be removable by an engaging member and an engaging groove that are installed opposite to the master unit and slave unit, and each can excavate as a separate shield excavator. The dual shield excavator according to claim 1, characterized in that: (3) A guide link is also installed around the outer periphery of the outer shell at the middle part of the front and back of the slave unit, and the slave unit rotates around the parent unit due to the drive from within the slave unit, and the slave unit rotates around the axis of the parent unit. The dual shield excavator according to claim 1 or 2, wherein the dual shield excavator is configured to be able to rotate and maintain the upright position of the slave machine relative to the master machine. (4) A compound shield excavator is used, which consists of a parent machine and slave machine, which are a pair of shield excavators with substantially the same performance and the same size, arranged in parallel in the axial direction, and connected to each other via a mooring device. , a tunnel excavation method using a dual shield excavator, characterized in that a slave machine is rotated around a master machine to excavate a tunnel having an arbitrary two-way cross-section in the vertical and horizontal directions. (5) A compound shield excavator is used, which consists of a parent machine and a child machine, which are a pair of shield excavators with substantially the same performance and the same size, arranged in parallel in the axial direction, and connected to each other via a mooring device. excavate a tunnel with arbitrary double cross-sections vertically and horizontally,
A tunnel excavation method using a dual shield excavator, characterized in that the anchoring device is disengaged at a predetermined branching point, and then a single shield excavator excavates at each point.