JP3186634U - Leak cap - Google Patents

Abstract

Provided is a leak cap for preventing a filler from leaking out of a filler injection hole penetrating through a lining concrete when repair work is performed.
A leak cap 40 is attached to a filler injection pipe 15 penetrating through lining concrete, and a fixing cylinder portion 41 fixed to a mounting device 34 by screw coupling, and a downward direction from the fixing cylinder portion 41 And a leak visually recognizing portion 42 for receiving the filler that has leaked through the injection tube 15 and the fixing cylinder portion 41. Even if the filler leaks out from the injection tube 15, the leak cap 40 can receive it, so that it is possible to reliably prevent the filler from splashing or splashing into a general vehicle passing through one side lane.
[Selection] Figure 3

Description

  The present invention relates to an instrument used for a lining back cavity filling tunnel repair method in which a filler is injected into a cavity formed between a lining concrete provided in a tunnel and a natural ground and repaired.

There may be cavities on the tunnel lining, especially on the back of old tunnels excavated using the sheet pile method. The lining on the back of the lining is a restoration method that fills the back of the lining of the tunnel, that is, the gap between the ground and the sheet pile, and returns the tunnel to its original shape.
As conventional techniques related to such a restoration method, “Backside cavity filling device” disclosed in Patent Literature 1, “Tunnel backside filling device” disclosed in Patent Literature 2, “Cavity filling method” disclosed in Patent Literature 3, Techniques such as “a tunnel back-injection method and an injection device used for the method” disclosed in Patent Document 4 exist.

JP 2012-180722 A Japanese Patent Laid-Open No. 7-91184 JP 2007-146522 A Japanese Unexamined Patent Publication No. 2013-91981

When repairing a tunnel by filling the backside cavity, the road leading to the tunnel cannot be closed and the repair work cannot be performed. Usually, repair work with traffic restrictions (one-way traffic) in the tunnel is carried out. .
By the way, when filling the backside cavity under one-way traffic due to lane restrictions, the filler is filled into the gap between the ground and the sheet pile through a plurality of injection holes opened in the covering concrete. An aerial work vehicle performs work while sequentially shifting the injection holes for filling the filler.

  At that time, a filler is injected using a certain injection hole, and then a filler is injected using an adjacent injection hole, and the filler is injected while sequentially switching the holes to be used. Usually, the injection holes are installed at a pitch of 5 m in the longitudinal direction of the tunnel, and the filler is injected in order from the injection holes on the lower side (injection holes on the lower side). Then, the work is performed so that the gap between the natural ground and the sheet pile is closed with a filler from one end side to the other end side without a gap.

  The filling material is injected from the injection hole until the injection pressure rises to a predetermined pressure. Therefore, in some cases, the filler may leak from the adjacent injection hole or the like. If the filler leaks from the injection hole opened in the lining concrete, the filler may not only scatter to the work lane but also hit a general vehicle passing through the oncoming lane. Therefore, great care must be taken to prevent leakage of the filler.

  This device was made based on this background, and was pierced into lining concrete when repair work was performed in a situation where lanes were restricted and ordinary vehicles were passing on one side of the road. It is an object of the present invention to provide a device that can prevent a filler from dropping or leaking from a hole for filling the filler, and can check whether or not the filler is properly injected and filled.

The device according to claim 1 is an instrument used in a tunnel lining method for filling a cavity on the back side of a lining, in which a filler is injected into a cavity formed between a lining concrete provided in a tunnel and a natural ground. A leak cap attached to a filler injection hole penetrating through the lining concrete,
A fixing cylinder part that fits into the hole, and is formed integrally with the fixing cylinder part, protrudes downward from the fixing cylinder part, and has a bottomed cylindrical shape formed of a transparent member. The hole and the fixing cylinder part And a leak visually recognizing portion for receiving the filler leaking through the leak cap.

  The fixing cap portion of the leak cap may have a fixing structure for fixing to a fitting provided on the injection end face side of the injection hole.

  The leak cap according to the present invention is attached in advance to a hole in a filling work standby state among a plurality of filler injection holes penetrated through the lining concrete. When the filler leaks from the hole in which the leak cap is attached, the leak of the filler can be confirmed surely and quickly, and it can be visually confirmed to which position the filler is filled. Therefore, the injection hole to be used can be switched to the next injection hole, and the switching movement can be performed at an appropriate timing.

  In addition, even if the filler leaks from the injection hole adjacent to the injection hole used for injection, it is received by the leak cap, so the filler is scattered or filled into a general vehicle that passes through one side lane. The material can be reliably prevented from scattering.

FIG. 1 is a schematic diagram of construction of tunnel repair work by filling the backside cavity. FIG. 2 is a schematic view of the repair method by filling the backside cavity. FIG. 3 is a view for explaining the configuration of the leak cap according to the embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a construction outline diagram showing an outline of a repair work site for filling a backside cavity.
In the lining on the back of the lining, an aerial work vehicle 2 is arranged in the tunnel 1, and the aerial work vehicle 2 is generated between the ground on the back through the lining concrete 3 constituting the ceiling portion of the tunnel 1. Inject the filler into the cavity.

Mortar is supplied from the mortar hopper 4 to the aerial work vehicle 2. Further, an additive such as a plasticizer is supplied from the plasticizer pump 5. In the aerial work platform 2, the supplied mortar and additive are mixed by the mixing unit 6 in the vicinity of the injection portion and injected into the cavity on the back surface of the lining concrete 3.
The mortar supplied to the mortar hopper 4 is a mortar containing air milk, and is supplied by, for example, the large-sized ready-mixed car 7. The mortar is manufactured at a ready-mix factory or a temporary construction plant.

FIG. 2 is a diagram showing an outline of repair work by filling the backside cavity.
In a tunnel excavated using the sheet pile method, a cavity (gap) 12 may be formed between the natural ground 10 and the sheet pile 11. In the sheet pile method, the natural ground 10 is excavated by a combination of the steel support 13 and the sheet pile 11, and the lining concrete 14 is placed on the inner surface of the excavation including the steel support 13. In the case of the sheet pile method, a cavity (gap) 12 is likely to be formed on the back surface of the lining concrete 14, that is, between the sheet pile 11 and the natural ground 10, and if this cavity 12 is left as it is, the earth pressure applied from the natural ground 10 is covered. There is a possibility that the concrete 14 does not act evenly, and the lining concrete 14 is cracked or leads to a risk of collapse.

  Therefore, lining on the back side of the lining concrete 14 is performed by filling the cavity 12 on the back side with a filler. In the lining on the backside of the lining concrete, the size and spread of the cavity 12 on the back side of the lining concrete 14 are inspected in advance, and one end side of the cavity 12 (for example, the left side in the figure, usually called the height under water). From the lower side) to the other end side (for example, the right side in the figure). Therefore, a plurality of filler injection holes 17a and 17b are opened in the lining concrete 14 at a predetermined interval (usually, a pitch of 5 m in the tunnel longitudinal direction). An injection tube 15 for injecting filler is inserted and fixed in each injection hole 17a, 17b. Further, a cap 40 is attached to the leak according to the present invention at the lower end of each injection tube 15.

  When injecting the filler, the leak cap 40 of the injection tube 15 used for injection is removed, and the ball valve device 20 is connected to the lower end of the injection tube 15. Then, the filler mixed in the mixing unit 6 of the aerial work vehicle, that is, the filler added and mixed with the mortar is filled into the cavity 12 through the hose 16, the ball valve device 20, and the injection pipe 15. Is done.

The start and stop of filling material injection is performed by the ball valve device 20.
By the way, when filling the filler from the injection tube 15 inserted into the injection hole 17a, a part of the filler may enter from the upper end of the injection tube 15 inserted into the adjacent injection hole 17b and leak downward. is there. When the filler leaks from the injection pipe of the adjacent injection hole 17 b, the leaked filler is scattered from the ceiling portion of the tunnel 1. When the injection hole 17b is closer to the center of the road, there is a problem that the leaked filler is applied to a general vehicle or the like passing through one side lane.

  Therefore, it is necessary to prevent the filler from leaking out so that the filler does not scatter from the injection pipe inserted into the adjacent injection hole 17b in the standby state of the filling operation or the unused injection pipe. . In addition, if the filler leaks from the injection pipe 15 of the adjacent injection hole 17b, it can be confirmed that the filling of the appropriate amount of the filler has been completed, and it is time to switch the injection hole to be used to the next injection hole. it can. For this purpose, the leak cap 40 according to the present invention is attached to the lower end of the injection pipe 15 waiting for filling work or the unused injection pipe 15.

FIG. 3 shows, as an example, a longitudinal sectional view (FIG. 3A) showing a configuration of a leak cap 40 according to the present invention attached to the injection hole 17b, and a perspective view of the mounting device 34 (FIG. 3B). It is.
With reference to FIG. 3 (A) and FIG. 3 (B), the injection | pouring pipe | tube 15 is inserted in the injection hole 17b penetrated by the lining concrete 14. FIG. Moreover, the attachment tool 34 is inserted into the lower end of the injection hole 17b from below, and is fixed to the lower surface of the lining concrete 14 with two anchor bolts 35, for example.

The attachment device 34 has a flange 36 at the lower end, a circular connection hole 37 is formed in the center of the flange, and long holes 38 for anchor bolts 35 are provided on both the left and right sides thereof. A cylindrical body 39 communicating with the connection hole 37 protrudes from the upper surface of the flange 36. The circumferential surface of the connecting hole 37 and the circumferential surface of the cylindrical body 39 form a series of inner circumferential surfaces and are threaded.
At the time of attachment, the lower end of the injection tube 15 is screwed into the upper end of the cylindrical body 39 of the attachment device 34. The injection tube 15 is inserted into the injection hole 17b from the tip. When the flange 36 of the fixture 34 into which the lower end of the injection pipe 15 is screwed is brought into contact with the lower surface of the lining concrete 14, the distance L between the tip of the injection pipe 15 and the underground is adjusted to about 50 mm. Yes.

Then, the anchor bolt 35 is driven into the lower surface of the lining concrete 14 through the long hole 38 of the flange 36, and the injection tube 15 and the fixture 34 are fixed to the injection hole 17b.
Note that an adhesive 50 may be provided between the inner peripheral surface of the injection hole 17 b and the outer peripheral surface of the injection tube 15, and the gap between the injection tube 15 and the injection hole 17 b may be fixed with the adhesive 50.
The leak cap 40 includes a cylindrical body formed of a transparent member, and has a bottomed 43 shape at the lower end. When the leak cap 40 is functionally divided, the upper part is a fixing cylinder part 41 that is screwed into the connection hole 37 of the mounting tool 34 and is located below the fixing cylinder part 41 downward. A cylindrical leakage visual recognition part 42 having a protruding bottom 43 is provided. A screw is cut on the outer peripheral surface of the fixing cylinder portion 41, and this screw is screwed into a screw hole extending upward from the connection hole 37 of the attachment device 34. As a result, the leak cap 40 can be attached to and detached from the attachment device 34.

  Since it is such a structure, the filler that has leaked through the injection tube 15 is received by the leak visualizing portion 42 of the leak cap 40 and accumulated therein. Therefore, the leaked filler can be prevented from splashing downward from the injection hole 17b and the injection pipe 50. Moreover, it can be confirmed reliably by the presence or absence of the filler accumulated in the leak visual recognition part 42 that the filler has leaked.

Although it is desirable that the leak visualizing part 42 is formed integrally with the fixing cylinder part 41, the leak visualizing part 42 may be configured otherwise. In short, any material that can receive and visually check the filler that falls downward through the injection tube 50 can be used.
The present invention is not limited to the embodiments described above, and various modifications can be made within the scope of the claims.

DESCRIPTION OF SYMBOLS 1 Tunnel 2 Aerial work vehicle 3 Covering concrete 10 Ground mountain 11 Sheet pile 12 Cavity 13 Steel support 14 Covering concrete 15 Filling material injection pipe 17a, 17b Filling injection hole 20 Ball bearing device 40 Leak cap 41 Fixing Tube part 42 Leak visible part 43 Bottom

Claims (2)

This is a tool used in the tunnel repair method for filling the backside of the cavities where the filler is injected into the cavity between the lining concrete provided in the tunnel and the ground, and repaired. A leak cap attached to a hole for filling filler,
A fixing tube portion that fits into the hole;
Filling material that is integrally formed with the fixing cylinder, protrudes downward from the fixing cylinder, has a bottomed cylindrical shape formed of a transparent member, and leaks through the hole and the fixing cylinder. A leak viewing part for receiving,
A leak cap comprising:   The leak cap according to claim 1, wherein the fixing cylinder portion of the leak cap has a fixing structure for fixing to a fitting provided on the injection end face side of the injection hole.

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