JPH10169392A - How to reinforce the segment - Google Patents

Abstract

(57) [Summary] [Problem] A large-section tunnel can be constructed under quick work and by selecting optimal conditions without adopting complicated processes that affect the construction period. It is an object of the present invention to provide a method for reinforcing a segment of a shield tunnel. A large tunnel is constructed by constructing a plurality of shield tunnels in parallel, connecting adjacent shield tunnels, and excavating the internal space of the connected shield tunnels as a ceiling plate, a wall surface, and a floor plate. In the construction method, first, when constructing a shield tunnel, reinforcement is performed according to the strength of the shield tunnel. Next, when an internal space is excavated to construct a large-section tunnel, reinforcement is performed according to the strength of the large-section tunnel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a method for reinforcing a segment.

[0002]

2. Description of the Related Art As shown in FIG.
A plurality of shield tunnels are constructed in parallel with surrounding the tunnels, and the adjacent shield tunnels 1 are connected to each other, concrete is filled in the group of the shield tunnels 1 after the connection, and the concrete is filled into a ceiling plate, a wall surface, and a floor plate. There is a construction method of constructing a large-section tunnel 2 as shown in FIG. This construction method has been evaluated because it is possible to construct a tunnel with a large cross section and any shape that cannot be excavated with a small or medium-sized shield tunnel 1.

[0003]

However, the above-described method for constructing a large-section tunnel has the following problems. <A> Each shield tunnel 1 constituting the large-section tunnel 2 has a rectangular shape. For this purpose, as shown in FIG. 7, the strength of the joint 4 between the pieces of the segment 3 is required to be higher than that of the circular tunnel. Requires higher strength. <B> For that purpose, at the time of constructing each shield tunnel 1, a method of reinforcing the strength required for the future large-section tunnel 2 may be considered. But large section tunnel 2
In order to provide the required strength, the joint work requires a great deal of labor. As a result, it is impossible to proceed with other operations in advance, and this joint operation becomes a constraint on all processes. <C> When constructing the shield tunnel 1, if the structure has the strength required for the future large-section tunnel 2, the connection having the final strength cannot be generally performed due to restrictions on the construction period.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and does not require a complicated joint assembling process which affects the construction period, and can be carried out under a rapid operation and with an optimum work. Large condition tunnel 2
It is an object of the present invention to provide a method for reinforcing the segment 3 of the shield tunnel 1 which can construct the shield tunnel.

[0005]

In order to achieve the above-mentioned object, a method for reinforcing a segment 3 according to the present invention is to provide a method for reinforcing a plurality of shield tunnels 1 while surrounding a predetermined underground area. And connect the adjacent shield tunnels 1 to each other.
In the construction method of constructing a large tunnel by excavating the internal space as a wall surface and a floor slab, first, when constructing the shield tunnel 1, a joint according to the strength of the shield tunnel 1 is formed, and the internal space is excavated to form a large tunnel. When constructing the structure, a method for reinforcing the segment 3 is provided, which constitutes a joint according to the strength of the large tunnel.

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

<A> Background of the present invention. The present invention focuses on the point that the joint strength required for forming the shield tunnel 1 and the joint strength required for the large-section tunnel 2 are completely different. That is, the reinforcement of the joint portion 4 when constructing the shield tunnel 1 is performed to the same degree as the joint strength of the conventional rectangular shield tunnel 1, and after that, at the stage of constructing the large-section tunnel 2, the condition of the position is taken into consideration. This is a reinforcement method capable of performing optimal reinforcement of the joint portion 4.

<B> Bolt holes for assembling the segment 3 Various reinforcing methods can be adopted from the above viewpoint. Next, an example shown in FIG. 1 will be described. A bolt hole 32 is opened in the end plate 31 in contact with the adjacent segment 3 as in the conventional segment 3. By passing a bolt through the bolt hole 32 and fastening a nut, the shield tunnel 1
In the stage of constructing the joint, a sufficient joint strength can be obtained.

<C> Orthogonal grooves. Next, an orthogonal groove 33 orthogonal to the surface of the segment 3 is formed in the end plate 31 of the segment 3 for use in constructing the large-section tunnel 2. That is, when the segment 3 is used in the horizontal posture, the orthogonal groove 33 is a vertical groove, and when the segment 3 is used in the vertical posture, the orthogonal groove 33 is a horizontal groove. Since the shelf 34 is attached to the inside of the end plate 31 of each segment 3 at substantially the center of the thickness, the orthogonal groove 33 is formed by cutting out the distance up to the shelf 34. A contact plate 35 is attached to a plane orthogonal to the end plate 31 and the shelf plate 34. The surface of the abutment plate 35 is arranged in a state of being coincident with the edge of the orthogonal groove 33.

<D> Reinforcement of segment 3 at the time of construction of shield tunnel 1 In the shield tunnel 1, the segment 3 is assembled inside the shield machine and the shield machine advances forward into the ground by taking a reaction force on the segment 3 ring. It is a construction method. To assemble the segment 3 to construct the shield tunnel 1, the bolt holes 32 of the end plate 31 are used. That is, the two segments 3 can be firmly fastened by inserting a bolt into the bolt hole 32 of the end plate 31 and tightening a nut from the opposite side in a state where the end plates 31 on both sides are in contact with each other.

<E> At the time of construction of the large section tunnel 2. After constructing a plurality of small-section tunnels, excavation is made between adjacent tunnels to make them continuous. A large section tunnel 2 is constructed by using these continuous tunnel groups as a ceiling plate, a wall surface, and a floor plate. When configured as a large-section tunnel 2, a huge external force that is incomparable with the single shield tunnel 1 acts on the joint portion 4 depending on the location. Therefore, the end plate 31
The steel contact plate 5 in the orthogonal groove 33 of the segment 3
Cross over the surface perpendicular to the surface of. Then, since the surface of the contact plate 5 comes into contact with the contact plate 35, the orthogonal contact plate 5 and the contact plate 35 are sewn together with bolts. Thus, both segments 3 can be firmly integrated.
The orthogonal grooves 33 are opened on both sides of one contact plate 35, and the two attachment plates 5 are applied from both sides for sewing. Further, if the outer plate is welded to the outside of the end plate 31 so as to straddle both the segments 3, the outer plate is further strengthened.

[0012]

Next, another embodiment will be described.

<A> Bolt hole 3 for assembling segment 3
2. The structure of another segment is shown in FIG. The end plate 31 in contact with the adjacent segment 3 has a conventional segment 3
A bolt hole 32 is opened in the same manner as described above. By fastening a nut through a bolt in the bolt hole 32, a sufficient joint strength can be obtained at the stage of constructing the shield tunnel 1.

<B> Parallel grooves. Next, in constructing the large-section tunnel 2, a steel contact plate 5 is bridged between the segments 3 in a plane parallel to the surface of the segment 3 to construct the large-section tunnel 2. For this purpose, a parallel groove 36 is formed in the end plate 31. Since the shelf 34 is attached to the inside of the end plate 31 of each segment 3 at substantially the center of the thickness,
The edge of the parallel groove 36 is positioned in contact with both sides of the shelf 34. When the segments 3 are used in a horizontal posture, the parallel grooves 36 are horizontal grooves, and when the segments 3 are used in a vertical posture, the parallel grooves 36 are vertical grooves.

<C> Reinforcement of segment 3 at the time of construction of shield tunnel 1
Is assembled using the bolt holes 32 of the end plate 31. That is, the two segments 3 can be firmly fastened by inserting a bolt into the bolt hole 32 of the end plate 31 and tightening a nut from the opposite side in a state where the end plates 31 on both sides are in contact with each other.

<D> At the time of constructing the large-section tunnel 2. After constructing a plurality of small-section tunnels, excavation is made between adjacent tunnels to make them continuous. A large section tunnel 2 is constructed by using these continuous tunnel groups as a ceiling plate, a wall surface, and a floor plate. When configured as a large-section tunnel 2, a huge external force that is incomparable with the single shield tunnel 1 acts on the joint portion 4 depending on the location. For this purpose, as shown in FIG. 3, the steel contact plate 5 is inserted into the parallel groove 36 of the end plate 31.
Is inserted in a plane parallel to the surface of the segment 3.
Then, the surface of the contact plate 5 comes into contact with the surface of the shelf plate 34 of both segments 3.
4 is stitched with bolts as shown in FIG. Thus, both segments 3 can be firmly integrated.
Further, if the outer plate 6 is welded to the outside of the end plate 31 so as to straddle both segments 3, it is more robust.

[0017]

As described above, the method of reinforcing the segment 3 according to the present invention is required for the joint strength necessary for forming the shield tunnel 1 and for the large-section tunnel 2 using the segment member as a stress material. Since the joint strength is made by paying attention to the point that the size is completely different, the following effects can be obtained. <A> At the stage of constructing the shield tunnel 1, it is economical because it is not necessary to manufacture and use the segment 3, which can provide a large-scale joint strength required for the large-section tunnel 2. <B> When the shield tunnel 1 is constructed, it is not necessary to perform the bolting work of the joint as required for the large-section tunnel 2. Therefore, work is efficient. <C> At the stage of constructing the large-section tunnel 2, the reinforcing work may be performed according to the timing and strength, and the reinforcing work does not affect the progress of all the processes. <D> When necessary, different reinforcements can be performed in consideration of the optimal position, strength, and application, so that appropriate and not excessive reinforcement can be performed. <E> When the shield tunnel 1 is constructed, the reinforcement required for the large-section tunnel 2 is not provided, so that there is sufficient room in the space, which does not hinder the work.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an embodiment of a method for reinforcing a segment according to the present invention.

FIG. 2 is an explanatory view of another embodiment.

FIG. 3 is an explanatory view of an embodiment of the reinforcing method.

FIG. 4 is an explanatory view of an embodiment of the reinforcing method.

FIG. 5 is an explanatory view of a method of constructing a large-section tunnel which is a background of the present invention.

FIG. 6 is an explanatory diagram of a method of constructing a large-section tunnel which is a background of the present invention.

FIG. 7 is a sectional view of a used segment.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takamasa Fukuda 1-25-1, Nishishinjuku, Shinjuku-ku, Tokyo Taisei Corporation

Claims (3)

[Claims] Claims: 1. A plurality of shield tunnels are constructed in parallel in a state surrounding a predetermined underground area, and adjacent shield tunnels are connected to each other. In the construction method of constructing a large tunnel by excavating the internal space as a floor slab, first, at the stage of constructing a shield tunnel, configure joints according to the strength of the shield tunnel, and excavate the internal space to construct a large tunnel At the stage, the method of reinforcing the segments is to construct joints according to the strength of the large tunnel. 2. When a large tunnel is constructed, a plate is fixed inside the joint surface of the segment in a state perpendicular to the surface plate of the segment, and an end plate of the joint surface of the segment is parallel to the plate. After the orthogonal groove is opened at the joint, the joint surfaces of the two segments are brought into contact with each other. 2. The method for reinforcing a segment according to claim 1, wherein the two segments are integrally formed by stitching the plate and the attachment plate together with bolts. 3. When a large tunnel is constructed, a shelf plate is fixed inside the joint surface of the segment in a state parallel to the surface plate of the segment, and an end plate of the joint surface of the segment is parallel to the shelf plate. After the parallel groove is opened, the joint surfaces of the two segments are brought into contact with each other, and then a steel contact plate with a length that spans both segments is inserted into the parallel groove to make contact with the shelf provided on the segment. 2. The method for reinforcing a segment according to claim 1, wherein the two segments are integrally formed by sewing the shelf plate and the attachment plate together with bolts.