JPH044074Y2 - - Google Patents

Description

[Detailed description of the invention] "Field of application of the invention" This invention relates to a device for supporting the outer surface of the PC lining plate on the ground in a tunnel lining structure using the PC lining plate.

"Prior Art" Applicants previously proposed a lining method for mountain tunnels, etc., in which four arc-shaped PC lining plates were placed along the ground between the upper ends of the left and right side wall concrete fixed to the tunnel side walls. Assembled in an arch shape, the lower ends of the side wall PC lining plates located on the left and right side walls of this arch are fixed to the side wall concrete, and the upper ends are fixed to the ground via anchor bolts, and the top of the crown part of the arch is fixed. A tunnel lining method for a PC structure was developed by joining the end PC lining plates to the side wall PC lining plates via pin joints.

``Problem that the invention aims to solve'' By the way, in the above-mentioned lining construction method, the left and right top PC lining plates assembled in an arch shape along the ground and the side wall PC lining plates are connected by pin joints, respectively. After the tunnel is constructed, vibrations such as earthquakes or high-speed train entry may occur,
There is a risk that the PC lining board will protrude toward the ground due to wind pressure caused by a typhoon, etc., and the pin joint will come off and the PC lining board will fall off.

"Means for solving the problem" This invention aims to solve the above-mentioned conventional problem.
By arranging a hollow body filled with solidifying material that can expand and contract freely in the gap between the PC lining board and the ground, it is possible to easily prevent the PC lining board from protruding toward the ground. , a PC designed to ensure safety
This paper proposes a support device for lining boards.

``Example'' Below, we will explain an example of this invention shown in the drawings. Figure 1 shows four PCs along the circumferential direction of the ground.
This figure shows a tunnel constructed using lining plates 1a and 1b. Side wall concrete 2, which is made of cast-in-place concrete or hardened PC lining plate, is fixed to the side wall of the excavated tunnel, and is fixed to the upper end. The lower end of the side wall PC lining plate 1a of the arch side wall is fixed via the hardware 3, and the upper end of the side wall PC lining plate 1a is fixed to the earth anchor and lock bolt which have been buried in the ground W in advance in the anchor bolt fixing hole 4. Alternatively, it is fixedly fixed to an anchor bolt 5 such as a joint bolt connected to these.

Then, between the upper ends of the left and right side wall PC lining plates 1a, 1a, the two top PC lining plates 1b, 1b of the arch crown part are pin-joined with nutkuru joints 6, 6, and the mutual axis It is lined with a static fixed arch structure with three-point hinges that stably stands on its own using force.

In the gap between the PC lining plates 1a and 1b and the ground W,
A hollow body 7 that can expand and contract freely is arranged in a direction substantially perpendicular to the PC lining plates 1a and 1b, and is expanded by a consolidating material 8 such as mortar injected into the hollow body 7, and is formed into the ground W. The PC lining plates 1a and 1b are connected to the ground W.
It is supported so that it does not protrude in any direction.

Figure 2 shows an embodiment of the hollow body 7 installed around the anchor bolt 5, in which front and rear plates 9, 9' are made of rubber, soft plastic, non-woven fabric, etc. Cylindrical body 1 that can be expanded and contracted
0 is attached, and central holes 11, 11' for inserting the anchor bolts 5 are provided at the centers of the plates 9, 9'.
The plate 9 at the rear end is fixed to the PC lining plate 1a by tightly fitting the boss 12 provided around the center hole 11 into the fixing hole 4 which also serves as a consolidation material filling hole.
The hollow interior and the center hole 11 are in communication with each other. In addition, the cylinder body 1
A deaeration hole 13 is provided in the plate 9' at the tip.

Note that it is desirable to use a flexible material such as soft plastic for the plate 9' at the tip so that it follows the unevenness of the ground W and comes into close contact with it.

FIG. 3 shows an embodiment of the hollow body 7 placed at a position other than around the anchor bolt 5.
In this case, a consolidation material filling hole 4', such as an air mortar injection port, is previously provided in the PC lining plates 1a and 1b, and the hollow body 7 is attached to the outer surface of the hole 4'. In this case, only the deaeration holes 13 may be provided in the rear plate 9 of the hollow body 7.

Note that the hollow body 7 may have a rear end portion as a rigid cylindrical body and a distal end portion capable of expansion and contraction.

FIG. 4 shows an example in which the cylindrical body 10 is constructed by telescopically combining a plurality of rigid cylindrical bodies 10a, 10b, and 10c with slightly different diameters.
In this case, the rigidity of the hollow body 7 is maintained as a whole, so even when the hollow body 7 is installed so as to expand in a substantially horizontal direction, it will not sag due to the weight of the filling material 8. can be expanded to.

When using the hollow body 7 in the above configuration, the solidifying material filling hole 4 of the PC lining plates 1a, 1b must be filled in advance.
Alternatively, the hollow body 7 is attached to the outer surface of the arch 4', and then the PC lining plates 1a and 1b are sequentially assembled to form a static fixed arch structure. In this case, when installing the PC lining board 1a, the anchor bolts 5 are passed through the center holes 11, 11' of the hollow body 7 and fixed in the fixing hole 4 via the fixing hardware 14 with the nuts 15. The fixing hardware 15 is provided with an injection hole 16 that communicates the inside and outside of the fixing hole 4.

In this state, a consolidating material 8 such as mortar is injected from each consolidating material filling hole 4' or the fixing hole 4 and the injection hole 16 and is press-fitted into the hollow body 7.
While inflating, press its tip to the ground W,
In this state, the consolidation material 8 is hardened.

As a result, the back surfaces of the PC lining plates 1a and 1b are supported by the ground W by the short column-shaped solidified material 8 solidified within the hollow body 7, and wind pressure and other external forces from the inside of the tunnel are prevented. Even if it acts, the protrusion toward the ground is prevented, so safety can be ensured.

In addition, in the area of the anchor bolt 5, as shown in FIG. 5, a bag-shaped hollow body 7 whose inside is filled and sealed with a consolidation material 8 in advance is placed around the anchor bolt 5 on the outer surface side of the PC lining plate 1a. Wrap it around the solidifying agent 8
It may be made to harden.

"Effects of the invention" As described above, according to this invention, in a tunnel lining structure formed in an arch shape by joining a plurality of PC lining plates along the ground through joints, the PC lining can be The outer surface of the PC lining board can be steadily supported by the ground using a simple method, since a hollow body filled with a solidifying material that can expand and contract freely is placed in the gap between the work board and the ground. This makes it possible to prevent dangers such as falling off even if external forces or vibrations are applied from inside after lining, and after assembling the PC lining board, it is possible to prevent the hollow body from falling off regardless of the size of the gap with the ground. By expanding it, the tip can be firmly pressed against the ground.

In addition, when placing a hollow body around the anchor bolt, the anchor bolt is covered with a solidifying material at the same time as supporting the PC lining plate, which prevents corrosion and allows the PC lining to last for many years. The board can be fixed and fixed effectively.

[Brief explanation of drawings]

Fig. 1 is a partial longitudinal sectional front view of a tunnel showing the installed state of the supporting device of this invention, Fig. 2 is a longitudinal sectional side view showing an example of the supporting device of this invention, Figs.
This figure and FIG. 5 are longitudinal sectional side views showing other examples. 1a, 1b...PC lining board, 4, 4'... Consolidating material filling hole, 7... Hollow body, 8... Consolidating material.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. In a tunnel lining structure formed in an arch shape by joining a plurality of PC lining plates along the ground through joints, the PC lining plate and the ground 1. A support device for a PC lining plate in a tunnel PC lining structure, characterized in that a hollow body filled with a solidifying material and capable of expansion and contraction is disposed in a gap between the PC lining plate and the tunnel PC lining structure. 2. The hollow body is installed on the outer surface of the PC lining board so as to be able to expand and contract, and the solidifying material is filled into the hollow body through a filling hole provided in the PC lining board so as to communicate with the interior of the hollow body, and then expanded. A support device for a PC lining plate in a tunnel PC lining structure according to claim 1 of the utility model registration claim.