JPH01207600A - Lining in shield driving method - Google Patents

Abstract

PURPOSE:To form a lining-worked part by installing an annular water sealing member on the inside of the tail part of a shield body and installing an annular tightening member which can be extended and contracted inside and assembling a member of segments against the tightening force of the tightening member on the inside of the tightening member. CONSTITUTION:A plurality of propulsion jacks 3 are installed onto a shield body 1, and a push ring 5 is installed at the rear edge of the rod 4 of each jack 3, and a water sealing member 6 is prepared from the water-sealing cloth, etc., and an annular tightening member 7 which can be extended and contracted and can be tightening-urged on the inside of the water sealing member 6. A number of small-sized segments 8 having a small width (t) in the peripheral direction of a tunnel are assembled in succession on the inside of the annular tightening member 7, and ceiling segments 8B are press-fitted against the tightening force of the tightening member 7 by pushing up the ceiling segment 8B from inside, and finally a lining-worked part 9 in which a number of segments 8 and 8B are integrally fixed in the surface pressed state, and the application in case of small diameter is permitted.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a lining method in a shield construction method.

[Conventional technology] Conventionally, the primary lining of tunnels excavated using the shield construction method involves pushing the shield body into the ground using propulsion jacks, and then constructing multiple wide concrete or metal linings inside the shield tail. The lining segments are assembled by bolting them together using mounting brackets while interposing the packing.

[Problems to be Solved by the Invention] In the above-mentioned conventional technology, the lining segment is large and expensive, and it cannot be applied to small diameter tunnels, and IJi and A are large, so it is difficult to use an assembly machine. It needed to be assembled. In addition, each segment was connected with bolts and nuts while intervening gaskets, making the assembly process troublesome.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a lining method in the shield construction method, which allows lining segments to be easily assembled and is also applicable to small diameter tunnels.

[Means for Solving the Problems] The lining method in the shield construction method of the present invention includes disposing an annular water-stopping member inside the tail portion of the shield body, and installing an expandable annular water-stopping member inside the water-stopping member. The lining portion is formed by disposing a tightening member and assembling a large number of segments inside the tightening member against the tightening force of the tightening member.

[Function] By the above method, a lining portion is formed in which a large number of segments are integrally fixed by the tightening force of the tightening member while water is cut off by the water cutoff member. Therefore, the segments can be assembled manually, and the work of interposing water-stop gaskets and bolting the segments can be eliminated. It can also be applied to small diameter tunnels.

[Example] Hereinafter, an example of the present invention will be described with reference to the accompanying drawings.

As shown in FIGS. 1 to 7, the shield body 1 has a plurality of propulsion jacks 3 attached to a tail skin 2 serving as a tail portion inside the shield body 1, and a rod 4 of each jack 3.
A rear end bushing ring 5 is provided. In FIG. 5, the propulsion jack 3 is in a state in which the stepwise advancement of the shield body 1 is completed and then the rod 4 is retracted. In this state, the tail skin 2 of the shield body 1
A hydrant member 6 having a suitably shaped annular shape, for example, a circular cylindrical shape, is arranged inside the. This water stop member 6 is made of water-leakproof cloth, resin, steel, or the like, and an annular tightening member 7 is disposed inside the water stop member 6. This tightening member 7 has a structure that can be expanded and contracted and can be tightened and biased,
For example, it is constructed by connecting four curved tightening rods 7A in a ring shape with a spring 7B. This tightening member 7 may be a ring-shaped spring with a core wire inserted through it, or may be made of a rubber material, etc. Then, as shown in FIG. are sequentially assembled inside the annular tightening member 7, and finally a ceiling segment having a tapered surface 8A serving as a model)
8B was pushed up from the inside of the hole and press-fitted against the clamping force of the clamping member 7, whereby a large number of segments 8.8B were integrally fixed in a blood pressure state by the clamping force of the clamping member 7. A lining portion 9 is formed. In this case, one assembly stand 1O is used while holding the segment 8 and inserting the ceiling segment 8B.

Next, the lining section 9 is made to bear a reaction force and the propulsion jack 3 is actuated to advance the shield body 1 and contract the rod 4. This process is repeated to perform the lining, and when performing the next lining, the water stop member 6 of the lining section 9 and the next water stop member to be installed are connected through the packing 11 etc. Connected by water-stop structure. For this connection means, an adhesive tape, a fastener, a pressure bonding material, a welding material, etc. (not shown) may be used.

In this way, in the above embodiment, the water stop member 6 and the tightening member 7 are arranged inside the tail skin 2 of the shield body l, and the tightening member 7 includes a large number of small segments (8.8).
By assembling B, a water-stopping effect is obtained by the water-stopping member 6, and a lining part 9 is formed in which a large number of segments) 8.8B are integrally fixed by the tightening force of the tightening member 7. . Therefore, Segment) 8.8B is small and inexpensive, and can be assembled by hand, and can be applied to small-diameter tunnels. Also, each segment)8.
8B can be assembled without intervening gaskets and does not require bolting, making the work easy and reducing construction costs. It can also withstand external forces such as earth pressure and water pressure that are applied after lining.

Note that the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the gist of the present invention.For example, the shape, structure, material, etc. of the water stop member and the tightening member may be selected as appropriate. Also the dimensions of the segment.

The number, material, etc. may be selected as appropriate. Alternatively, the ceiling segment may be press-fitted horizontally along the axis of the tunnel hole, as shown in FIG.

[Effects of the Invention] The present invention provides a cylindrical water-stop member inside the tail portion of the shield body, an expandable annular tightening member inside the water-stop member, and By forming a lining part by assembling a large number of segments inside the attachment member against the tightening force of the tightening member, the segments can be easily assembled and can be used even in small diameter tunnels. It is possible to provide a lining method in the applicable shield construction method.

[Brief explanation of the drawing]

1 to 7 show an embodiment of the present invention, FIG. 1 is a perspective view of the lining part, FIG. 2 is a schematic explanatory diagram showing the lining state,
Figure 3 is a longitudinal cross-sectional view of the lining, and Figure 4 is A-AV of Figure 3.
j An enlarged sectional view, FIGS. 5 to 7 are sectional views of main parts showing the lining order, and FIG. 8 is a plan view showing another embodiment. 1.Shield body 2..Tail skin (tail part) 6φ.Water stop member 7..Tightening member 8.8B..Segment 9..Lining section Patent application Kagata Gumi Co., Ltd. Representative Patent Attorney Ushi Tree Mamoruoguchi Figure 3 - Figure 2 Figure 51 Sae Figure 6

Claims (1)

[Claims] A cylindrical water-stopping member is arranged inside the tail portion of the shield body, an extensible annular tightening member is arranged inside this water-stopping member, and a large number of segments are arranged inside this tightening member. A lining method in the shield construction method, characterized in that the lining is assembled against the tightening force of the tightening member to form a lining portion in which a large number of segments are integrally fixed by the tightening force of the tightening member. .