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Tunnel top arch free-of-cavity lining method

A top arch and cavity technology, applied in the field of top arch lining, can solve the problem of not being able to observe the pouring situation of the top arch formwork pouring port

Active Publication Date: 2018-07-24
CHINA RAILWAY NO 5 ENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: Aiming at the current observation means, when pouring at the pouring port of the top arch, the pouring situation behind the pouring port of the top arch formwork cannot be observed, and a lining that can observe the secondary lining of the top arch in all directions is provided method

Method used

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  • Tunnel top arch free-of-cavity lining method
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  • Tunnel top arch free-of-cavity lining method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: The observation tube in this embodiment is an integrated observation tube with an integrated camera.

[0035] An observation hole is set on the arch template of the lining trolley, and a closing device 4 is welded under the observation hole. The closing device 4 is composed of a fixed flange and an insert plate 10. The fixed flange is connected with the positioning flange 5 on the observation tube 2 by hinge bolts. , to facilitate the disassembly and assembly of the observation tube 2, the upper end surface of the fixed flange of the closing device 4 is provided with a chute, and an inserting plate 10 is arranged in the chute, the inserting plate 10 is close to the vault formwork, and the inserting plate 10 is used to take out the observation tube 2 , Move the insert plate 10 to block the observation hole, and the concrete will not leak out. There is a positioning tube 16 in the center of the positioning flange 5, and a pin hole is provided on the cylinder...

Embodiment 2

[0052] Embodiment 2: In this embodiment, the end formwork of the trolley is removed, and it is used in the case where both ends of the lining trolley are overlapped and already lined, and the upper end of the observation tube 2 is opened, and the sealing method is adopted from the inside of the tube upward.

[0053] (1) Opening of roof arch formwork for the second lining of the tunnel

[0054] At the highest point of the roof arch formwork of the lining trolley, on the side of the pouring port 3 close to the lining of the upper ring, a distance of 1 lining thickness is added to install the observation pipe 2 and 2 grouting pipes 1 (one of which is the grouting pipe 1 as an intermediate vent or end-die vent or spare grout pipe). General lining trolley roof arch formwork has 4 pouring ports. According to the number of pouring ports, 5 sets of holes are reserved for installing observation pipe 2 and 2 grouting pipes 1, and the middle 3 groups are for installing observation pipe 2...

Embodiment 3

[0068] Embodiment 3: This embodiment is a lining method that does not remove the observation probe 12 at the top of the original end mold. It is used when one end has been lined and overlapped with a ring lining and the other end has not been lined, and the upper end of the observation tube 2 in this embodiment The opening is sealed by pressing down from the outside of the tube. Specific steps are as follows:

[0069] (1) Opening holes in the formwork of the roof arch of the lining platform

[0070] At the highest point of the roof arch formwork of the lining trolley, on the side of each filling port 3 close to the lining of the upper ring, a distance of 1 lining thickness (in order to ensure that the observation tube 2 and the grouting tube 1 are all in the space of the steel bars, The distance is only an approximate value), drill observation holes and grouting holes, add observation tubes 2 and 2 grouting tubes 1 (one of which is used as the middle exhaust pipe or end mold ...

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Abstract

The invention discloses a tunnel top arch free-of-cavity lining method. A top arch formwork is hollowed and an observation pipe is installed, the pouring situation is observed when concrete is poured,and whether grouting with formwork is carried out or not is defined according to the observed situation. According to the tunnel top arch free-of-cavity lining method, monitoring of the situation ofsecond lining perfusion is carried out by arranging the observation pipe on a top arch of a trolley, an observation probe can be used for extending into the observation pipe for observing the concretepouring situation in an observation formwork, cavities can be prevented from being formed, and a plurality of observation pipes can be installed on the formwork to realize omni-directional monitoring.

Description

technical field [0001] The invention relates to a tunnel lining method, in particular to a top arch lining method. Background technique [0002] When the lining trolley is used for the secondary lining of the tunnel, there are cavities in the concrete, which will have a great impact on its strength. Generally, the lining trolley is easy to produce cavities in the top arch part, and it is not easy to find the cavity during the pouring process. The voids were only discovered when the lining trolley was demoulded; even after demoulding, the voids were not visible, but there were already voids inside the concrete. The main reasons are: (1) When the lining trolley pours the upper part of the roof arch, since there is no pouring window, only the pouring port, the pouring personnel cannot observe the pouring situation of the upper part of the roof arch as in the pouring window, that is, they cannot clearly Observe the perfusion in the upper part of the arch. (2) In the places whe...

Claims

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Application Information

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IPC IPC(8): E21D11/10
CPCE21D11/10E21D11/102E21D11/105Y02E10/20
Inventor 陈德斌冯春田夏真荣傅强罗武装
Owner CHINA RAILWAY NO 5 ENG GRP
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