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Technology for solving problem of tunnel lining vault disengaging

A vaulting and voiding technology, applied in the direction of tunnel lining, tunnel, shaft lining, etc., to achieve the effects of small shrinkage, cost reduction, and high bonding strength

Inactive Publication Date: 2018-10-09
BEIJING TIEKE SHOUGANG RAIL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of low bonding strength between grouting material and concrete, long construction period and low construction efficiency in the existing tunnel lining vault void disease treatment process, the present invention provides a process for solving the void problem of tunnel lining vault

Method used

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  • Technology for solving problem of tunnel lining vault disengaging
  • Technology for solving problem of tunnel lining vault disengaging

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Such as figure 1 As shown, the present invention provides a kind of technology that solves the tunnel lining arch void problem, and concrete process is as follows:

[0039] S01: Determine the position of the void area of ​​the vault and the size of the void area of ​​the vault through the detection device;

[0040] In this embodiment, the detection device is a radar scanning device, which scans the tunnel to determine the position and specification of the void area.

[0041] S02: Determine the location and number of grouting holes according to the size of the void area of ​​the vault;

[0042] According to the specifications of the void area of ​​the vault determined by the radar scanning device, the number and location of the grouting holes are specifically determined. The distance between the grout holes is 1m-1.5m. Such a distance setting is beneficial to ensure the flow radius of the grouting material. The specific distance value should be determined according to ...

Embodiment 2

[0058] The micro-expansion grouting material in this embodiment has the following characteristics:

[0059] A. The micro-expansion grouting material has high fluidity. The basic fluidity of the traditional grouting material is about 320mm, while the initial fluidity of the grouting material in this embodiment is 390mm. Under the grouting pressure, the fillable radius of the micro-expansion grouting material is greatly increased, and the fillable radius is less than 2mm. Gaps, filling effect is good.

[0060] B. The volume expands slightly after mixing with water. The grouting material has an expansion rate of 0.7% in the plastic stage, which can actively and effectively fill the void area.

[0061] C. The coagulation time is fast. This means that the plugging can be carried out within 1 to 2 hours after the grouting is completed, which improves the construction efficiency.

[0062] D. High bonding strength with concrete. The micro-expansion grouting material has good tens...

Embodiment 3

[0066] Such as figure 2 Shown is a schematic diagram of a grouting rod for a process to solve the problem of hollowing out of a tunnel lining vault according to an embodiment of the present invention. 2. Locking hoop 3, rubber bladder 4, grouting pipe 5 and movable hoop 6; one end of grouting pipe 5 is connected to grouting port 1, and the other end is connected to grouting port 7; water injection port 2 and rubber bladder 4 The rubber bag 4 is set on the grouting pipe 5, and the two ends of the grouting pipe 5 are exposed, and one end of the rubber bag 4 is fixed on the grouting pipe 5 through the locking hoop 3, and the locking hoop 3 Near the side of the grouting port 1, the movable collar 6 used to limit the displacement direction of the rubber bladder 4 during the expansion process is located at the other end of the rubber bladder 4, and the front end of the rubber bladder 4 can slide on the grouting pipe 5; at the same time, close to the movable collar 6 The exposed se...

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Abstract

The invention provides a technology for solving the problem of tunnel lining vault disengaging. The technology comprises the steps that the location and size of a disengaging area of a vault are determined by a detection device; the location and quantity of a grouting hole are determined according to the size of the disengaging area of the vault; the drilling operation is carried out at the location of the identified grouting hole; a grouting bar is installed in the drilled grouting hole; grouting materials are mixed with water to form uniform grouting materials through grouting equipment, andthe grouting materials are injected into the disengaging area of the vault through the grouting bar; and after the disengaging area of the vault is filled with the grouting materials, the grouting hole is subjected to plugging operation. A traditional grouting pipe is replaced by the grouting bar to improve the construction efficiency, and meanwhile, the grouting bar can be recycled for use to reduce the cost. The grouting materials adopt micro-expansion grouting materials, the micro-expansion grouting materials can be expanded to be fully combined with concrete in the moulding stage, the shrinkage rate is small after hardening, and the bond strength with concrete is high, and the problem of disengaging from concrete after hardening in the traditional process is solved.

Description

technical field [0001] The invention belongs to the technical field of tunnel engineering, and in particular relates to a technique for solving the void problem of a tunnel lining vault. Background technique [0002] In the tunnel lining construction, due to the special position of the vault, there may be unavoidable problems in the construction due to the reservation of pouring, unreasonable setting of plugging holes, poor control of pumped concrete pressure, shrinkage of concrete, uneven support and other reasons. As a result, the vault and the concrete lining support surface are not closely bonded, and the concrete capping of the arch is prone to voids and cavities. Tunnel lining voiding is one of the most common phenomena in tunnel quality defects, and it is also one of the main internal causes of other tunnel lining disease variations. Serious lining voiding will directly affect the bearing capacity of the lining structure, endangering pedestrians and traffic Safety. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10
CPCE21D11/105
Inventor 杨富民孙成晓陈玉琪李晨何军利闫俊洁
Owner BEIJING TIEKE SHOUGANG RAIL TECH CO LTD
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