JPS6088792A - Curve shield construction method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Technical Field of the Invention) The present invention relates to a curved shield construction method V in which a tunnel having a curved portion with a relatively large curvature is excavated by a shield machine.
Regarding C 1. (Prior art and its problems) In general, are sewerage and 6j 7-rud tunnels underground below the road and aligned with the road? i > ′). However, when the shield tunnel must be bent along a comparatively curved curve at a road intersection, etc., it is impossible for the shield machine to excavate along a comparatively curved curve. Construct a rotating shaft,
A commonly used method is to change the direction of the shield machine within the shaft.

However, in recent years, the number of shield tunnels has increased, and the construction environment on the ground has become harsher, so the construction of the 11/, -S"/ pit has been done in rotation. For example, when there is heavy traffic, Due to the construction environment, such as narrow road width and the presence of many underground objects, it is often impossible to construct a vertical shaft from the ground.

In such cases, conventionally, freezing construction methods were used to construct the rotating space and sharp curves using 4 redonnels, or NA'J''T was constructed using many auxiliary construction methods.
There are also two examples in which a rotating space and a sharply curved construction space were constructed using the vlT method, and then the direction of the rock being dug was changed at right angles. However, the construction costs would be high, and the safety of the construction would be problematic since it was done with full reliance on the subsidy method.

(Purpose of the Invention) The present invention was made in order to solve such conventional problems, and its purpose is to economically and safely create a comparatively curved section using only the seal method. - To provide a sharp curve that can excavate a wall.

(Summary of the Invention) After a normal diameter tunnel is excavated almost in a straight line by the primary shield machine to the starting point of the curved part of the tunnel, an enlarged shield machine is used to excavate a part of the normal diameter tunnel behind the secondary shield machine. After building a launch base and assembling an expanding shield aircraft with a short captain at the launching base, the expanding shield aircraft will fly JJR.
An enlarged tunnel is excavated along a predetermined curve at the end position of the curved portion, and then the shield machine is operated at the end point 7 of the enlarged tunnel within the already excavated enlarged tunnel. l(-r to transport,
The next step is to use the shield machine to cut the normal diameter tunnel again in a straight line in a certain direction.

The second gist of the present invention is that after a normal diameter tunnel is excavated almost in a straight line by a second shield machine to a constant depth, a part of the normal diameter tunnel is excavated behind the second shield machine. After constructing a launch base for the expanding shield machine and assembling a circular expanding shield machine with a short pilot length at the starting base, use the expanding shield machine to perform expanding excavation and partially excavating to almost the circumference of the tip of the shield. After that, the enlarged shield and a part of the shield machine are combined together, and at least the face plate of the second shield machine is left and the other parts are removed,
After that, by the expansion shield machine integrated with the next shield machine,
Excavate an enlarged tunnel to the specified curve until the 731i fixed hull, then remove the enlarged shield machine from the next shield (9), and remove the removed part from the next shield machine again. The purpose is to excavate a normal diameter tunnel in a substantially straight line in a fixed direction of Qi using the secondary shield machine.

(Example 1)] Hereinafter, embodiment 1j of the present invention will be described and explained with reference to the drawings.

Figure 3r, 1 shows the overall outline of the construction method of the present invention.

That is, code A is the intersection of roads 1 and 2, 't
A tunnel 4 with a normal diameter is partially constructed under the road I by the shielding machine 3, and an enlarged tunnel is constructed below the intersection A on the extension of the tunnel 4 with the normal diameter. An enlarged seal machine 6 is located at the tip (end) of the enlarged tunnel 5. -! In addition, ladle F34a indicates a normal diameter tunnel to be constructed along road 2.

Thus, crossing,'? , a song that curves relatively sharply downwards to 'i1t! 7? The construction method of the Noyama regular diameter tunnels 4 and 4a having K will be explained in detail based on FIG. 2 and subsequent figures.

The first embodiment of the construction method of the present invention, as shown in Figures 1 and 2,
1 Partial shield (Ao: 3 e) Excavate a normal diameter tunnel 4 along a predetermined almost linear route to a predetermined position near intersection A 1, JLTl, '?!' + diameter tunnel 4 A part of the segment 8 is installed on the inner surface of the shield machine 3 using an existing electric cooler (not shown).
It is equipped with a propulsion machine 11, etc., but it is the same as the conventional one.
Since it is of +Ii construction, detailed explanation will be omitted.

As mentioned above, after excavating the normal diameter tunnel 4 with a predetermined 19 inch diameter, the -next nord machine 3 is made 1 inch in size, and it is expanded to a part of the normal diameter tunnel 4 behind the -next shield machine 3. Build the 44F1 base 12 of Nodame of the shield machine 6. To excavate the base 112 of the shield machine 6, it is acceptable to do 1/1 work by hand, etc., but as shown in Figure dl, 3, the applicant's It is efficient to use the circumferential shield aircraft 13 proposed in irl earlier. Note that ♀ :) 15 indicates a circumferential segment, and the circumferential shield machine 1
3 obtains a reaction force from the enclosure 14 or the circumferential segment 15 and excavates one using the propulsion jack 16 to construct the starting base 12.

Next, the expansion shield machine 6 is assembled at the starting base 12. In this case, as the expanding shield machine 6, only the one corresponding to the cutting edge part of the primary shield machine 3 "j" is used; Since the structure is almost the same except that the structure is larger, the detailed explanation [BJ] will be omitted.

After assembling the expanding shield machine 6, as shown in FIG. Excavate all 5 expansion tunnels.

In addition, when digging the expanding shield machine 6, in order to prevent the next Nord Tsuki 3 from becoming an evil storm, some of the Nord Tsuki 3 should be returned to the starting base 12 in advance and completely stored inside the starting base 12. You may also do so.

In this case, part of the moon law of the starting base 12 is set in advance for the shield machine 3.
You may store it completely and make it as big as VC, or you may enlarge the starting base 2 when you return the next shield rock 3.

However, in this embodiment, a part of the shield machine 3 is not returned but is supported by a desired means, and the area around it is excavated by the enlarging/ruding machine 6.

Note that the secondary segment 17 is attached to the inner surface of the enlarged tunnel 5 using an existing erector or a desired means. In addition, a part of Nord Iso 3 is moved to a predetermined position rtt within the enlarged tunnel 5.
In order to support the shield at the same time, it is preferable to use a platform 18, as shown in FIGS. In this embodiment, the enlarging shield machine 6 uses a propulsion jack (not shown) to obtain a reaction force from, for example, a reaction force receiver 20 or a secondary segment 7 to dig.

” - the expanded node W'J (i is - in this example)
Next/- 3 cups left behind! y: Ladle number 6 in the diagram
As shown in a, the tunnel 5 is enlarged at a predetermined point along a predetermined curve below the intersection A while gradually changing its direction.
excavate.

After the expansion tunnel 5 is excavated, the shield receiver is placed on the platform 1.
Part of the shield machine 3 inside the expanded tunnel 5 using 8th class'
(FIG. 1) is conveyed at the end of the enlarged tunnel 5.

Then, the normal diameter tunnel 4a is cut once again in a predetermined direction by the secondary shielding machine 3.

In the past, it was possible to easily excavate curved tunnels using just a shield machine without installing a rotating shaft.

Next, consider the second embodiment of the present invention. To be clear, it is almost the same as the first embodiment that the enlargement shield machine 6 is partially □nord (front end of the 3 + 1 near 1 and 1λ11 advance), but in this embodiment, the enlargement/-fold machine is 6 into a ring-shaped semi-finished state, and after that, as shown by reference numeral 6b in FIG. 1, the enlarged tunnel 5 is constructed to the required location using an enlarged shield machine 6b, and then expanded as shown in FIGS. 4 and 6. shield machine 6b
And-next shield j3! For example, the tail part 3a of the second shield machine 3 is removed from the body part 3b.Then, the second shield machine 3 is Enlargement of a part and one / - Rudo (; or 5 +) (From /C, gradually change direction and intersect?
,';Person 1. Excavate the enlarged tunnel 5 with a predetermined number of IJr 'J: +'f'' on the fixed curve.

In addition, the annular enlargement/-ruto machine (i b and part)-ruto cane i (3) is used in an integrated manner, -th shield + 8
At least part 011 of 3, Zunawachi blade mouth, cuckoo,
All you need is a mud excavator, a face plate, a retaining plate, etc., and you get one +T! l R'% When removing the sol parts 3 and 1, do not leave any traces behind. As a result, −
Next, the dimension of the shield t393 becomes /IJ,), making it easy to perform enlarged excavation at 71> on a steep curve.

Next, expand 1/nel 5, 4. After finishing Iij cutting, as shown in Fig. 1, a part of the shield machine 3 is removed from the enlarged shield e61), but before that, a part of this part of the shield (Iku3 Then, the normal diameter tunnel 43 is reassembled in a straight line in a predetermined direction using the reassembled shield 4 3. dig.

As is clear from the description of Example 1, in the construction method of the present invention, a curved enlarged tunnel is excavated by an enlarged shield machine, and a part of the shield machine is moved inside the enlarged tunnel by a conveying device or an enlarged shield machine. Since it is propelled, there is no need to construct a rotating vertical shaft as in the past, and the direction of a part of the tunnel can be changed economically and safely.

(Effects of the Invention) According to the present invention (/C), a construction method can be obtained in which a shield machine can efficiently and safely excavate a hole having a relatively steep outside curve.

[Brief explanation of the drawing]

Figures 11-1 to 6 are process diagrams showing the first and second embodiments of the construction method of the present invention. Figure 1 is a schematic cross-sectional view showing the entire construction method of the present invention, and Figure 2 is a normal diameter Rough longitudinal section 174 of the state where the tunnel and expansion shield aircraft launch base have been constructed
-1 Figures 1 and 3 are sectional views taken along the line III-III in Figure 2, Figure 4 is a schematic vertical cross-section 1r11 of the state in which the expanding shield machine is propelled, and Figure 5 is a 1:4 cross-sectional view - v-line sectional view,
Figure 6 is an enlarged diagram showing the connection relationship of the primary shield machine. 5... Expanded tunnel 6.6a, 6b... Expanded shield I8 - next segment 9, 1o... Mud water pump 11... Propulsion -/Yakki 12... Starting base 17...
...Secondary segment 18...The tooled receiver is the stand Fig. 2-1E No. 41 closed Fig. 3 1'1 Fig. 5 7

Claims (3)

[Claims] (1) - Next shield IM' makes it almost straight? 1-1
11. At the beginning of the curved part of the tunnel. ; After excavating a normal diameter tunnel according to the location dimensions, construct a launch base for the expansion shield machine in a part of the normal diameter tunnel behind the next shield machine, and assemble the short expansion shield machine at the launch base. , the enlarged shield machine is used to form a predetermined curve, and an enlarged tunnel is excavated at one position of the end of the curved part, and then the above-mentioned next shield (the end of the enlarged tunnel) is transported in the enlarged tunnel of the excavated tube. 2. A curved shield method characterized in that the normal diameter tunnel is cut again in a substantially internal line shape in a predetermined direction VC using the secondary shielding machine. (2) After excavating a normal diameter tunnel approximately along the straight helix with the next sord machine at the starting end position of the curved section, the shield machine is started to enlarge a part of the normal diameter tunnel behind the second shield machine. After constructing a base and assembling an annular expanding shield machine with a short captain at the launch base, expanding excavation is performed using the expanding shield machine and excavating a part of it in a trench around the tip of the shield machine. At least a part of the shield machine is removed and attached to the expanding shield machine, and the remaining part of the shield machine is left alone. 1=1 The tunnel is expanded along a predetermined curve to the end position of the curved part by the expanding shield machine. excavate the area, and then transport the left partially shielded machine to the curved section end position 1, and then remove a part of the partially shielded machine from the expanding shield machine, and attach the removed part to the partially shielded machine again. (= 1 digit, a curved shield construction method characterized by excavating a normal diameter tunnel in a substantially straight line toward a predetermined 11,000 J with the next shield machine. (3) After assembling the expansion shield machine at the launch base,
Claim 10,111, wherein the second shield machine is returned to the starting base and completely stored in the starting base, and then the expansion/route machine is made to dig.
The curve Shield method described in section.