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A method of embedding pressure cells applied to tunnels with rich water and weak surrounding rocks

A technology of weak surrounding rock and pressure cell, which is applied to mining equipment, earthwork drilling, force/torque/power measuring instruments, etc., can solve the problem that the pressure cell cannot be rich in water and weak surrounding rock, and achieve the goal of reducing material consumption Effect

Active Publication Date: 2020-12-25
CHINA RAILWAY TUNNEL GROUP CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a pressure cell embedding method applied to tunnels with rich water and weak surrounding rocks, so as to solve the problem that the pressure cells installed in the existing method cannot be closely attached to the rich water and weak surrounding rocks

Method used

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  • A method of embedding pressure cells applied to tunnels with rich water and weak surrounding rocks
  • A method of embedding pressure cells applied to tunnels with rich water and weak surrounding rocks
  • A method of embedding pressure cells applied to tunnels with rich water and weak surrounding rocks

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Embodiment

[0034] A method for embedding pressure cells applied to water-rich and weak surrounding rock tunnels, such as figure 1 As shown, on the surrounding rock surface after blasting and excavation of the water-rich and weak surrounding rock tunnel, submerge the anchoring agent 3 in water, take it out after one minute, tear off the outer packaging of the anchoring agent 3, and then completely wrap the anchoring agent with PVC film 2 for anchoring 3 and bind the PVC film 2 with cable ties to make it a closed body. After the anchoring agent is about to harden for 1-2 minutes, put the anchoring agent 3 wrapped in the PVC film 2 on the surrounding rock surface, and then stick it with the pressure box 4 Tighten the PVC film 2 and forcefully squeeze the anchoring agent 3, so that the anchoring agent 3 and the surrounding rock surface are tightly fitted and leveled.

[0035] Then four long threaded steel bars with a diameter of 8mm and eight short steel bars with a diameter of 8mm are proce...

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Abstract

The invention discloses a burying method of a pressure box applied to a water-rich weak surrounding rock tunnel. The burying method includes the following steps that an immersed anchorage agent is completely wrapped by a PVC film; the anchorage agent wrapped by the PVC film is placed on the surrounding rock surface of the tunnel inner wall when the anchorage agent approaches a hardening state; theanchorage agent wrapped by the PVC film is attached tightly and squeezed by the pressure box; a supporting base is installed at the bottom of the pressure box; and wires in the pressure box are led out to a monitoring box, and the problem that the pressure box installed by an existing method cannot be attached to the water-rich weak surrounding rock tightly is solved.

Description

【Technical field】 [0001] The invention belongs to the technical field of tunnel construction, and in particular relates to a pressure cell embedding method applied to a tunnel with rich water and weak surrounding rock. 【Background technique】 [0002] In the process of tunnel construction, in order to analyze the stress of the initial support and provide reference for the dynamic design of the initial support, it is necessary to monitor the pressure of the surrounding rock and the initial support interface. At present, after tunnel blasting and excavation, there are usually two ways to bury pressure cells. (1) Perform preliminary leveling of the surrounding rock surface on the surrounding rock near the steel arch frame, then attach the pressure box to the leveled surrounding rock surface, and support the four corners of the pressure box through the front ends of the four steel bars. The ends are welded to the steel mesh. (2) Smooth the surrounding rock surface with cement m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F17/00E21F17/18G01L5/00
CPCE21F17/00E21F17/18G01L5/00
Inventor 种玉配熊炎林张帅军杨泽平吕瑞虎高山高广义何伟白中坤杨效广
Owner CHINA RAILWAY TUNNEL GROUP CO LTD
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