A method of advanced grouting for tunnel faces in cement-rich formations

A technology of advanced grouting and cement rock, applied in tunnels, tunnel linings, earthwork drilling, etc., can solve the problems of blocked construction progress, water gushing, mud gushing, and high construction cost of cement-rich tunnels, so as to improve construction efficiency and equipment. Effectiveness of utilization rate, water inflow control, and improvement of construction efficiency

Active Publication Date: 2021-05-28
RAILWAY NO 5 BUREAU GRP FIRST ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual construction process, problems such as water inrush are easily affected by geological influences, especially in water-rich areas, where water and mud gushing are prone to occur during construction, which seriously hinders the construction progress of cement-rich rock tunnels, and the construction cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A method for advanced grouting on the face of a tunnel in a cement-rich stratum, comprising the following steps:

[0030](1) Carry out advanced geological forecasting and detect the fault fracture and groundwater location in front of the tunnel face in cement-rich strata;

[0031] (2) Carry out the grouting design for the face of the tunnel face in rich cement rock stratum according to the detected fault fracture and groundwater position in front of the tunnel face in rich cement rock stratum, and determine the target grouting reinforcement area;

[0032] (3) Set up monitoring points in the target grouting reinforcement area, and the monitoring points are used to monitor the grouting construction and the grouting curing effect;

[0033] (4) Spray concrete on the working surface and pour the grout-stop wall. The thickness of the grout-stop wall is determined according to experience and is related to the scope of the target grouting reinforcement area; Slurry hole positi...

Embodiment 2

[0047] A method for advanced grouting on the face of a tunnel in a cement-rich stratum, comprising the following steps:

[0048] (1) Carry out advanced geological forecasting and detect the fault fracture and groundwater location in front of the tunnel face in cement-rich strata;

[0049] (2) Carry out the grouting design for the face of the tunnel face in rich cement rock stratum according to the detected fault fracture and groundwater position in front of the tunnel face in rich cement rock stratum, and determine the target grouting reinforcement area;

[0050] (3) Set up monitoring points in the target grouting reinforcement area, and the monitoring points are used to monitor the grouting construction and the grouting curing effect;

[0051] (4) Spray concrete on the working surface and pour the grout-stop wall. The thickness of the grout-stop wall is determined according to experience and is related to the scope of the target grouting reinforcement area; Slurry hole posit...

Embodiment 3

[0067] A method for advanced grouting on the face of a tunnel in a cement-rich stratum, comprising the following steps:

[0068] (1) Carry out advanced geological forecasting and detect the fault fracture and groundwater location in front of the tunnel face in cement-rich strata;

[0069] (2) Carry out the grouting design for the face of the tunnel face in rich cement rock stratum according to the detected fault fracture and groundwater position in front of the tunnel face in rich cement rock stratum, and determine the target grouting reinforcement area;

[0070] (3) Set up monitoring points in the target grouting reinforcement area, and the monitoring points are used to monitor the grouting construction and the grouting curing effect;

[0071] (4) Spray concrete on the working surface and pour the grout-stop wall. The thickness of the grout-stop wall is determined according to experience and is related to the scope of the target grouting reinforcement area; Slurry hole posit...

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Abstract

A method for advanced grouting on the face of a tunnel in a cement-rich stratum, comprising the following steps: (1) performing advanced geological prediction; (2) designing the face grouting in the cement-rich stratum to determine the target grouting reinforcement area; 3) Arrange monitoring points in the target grouting reinforcement area; (4) pour the grouting wall, design the advanced grouting hole position and the advanced pipe shed hole position; (5) implement the advanced grouting and advanced pipe shed drilling operations; (6) ) Preparation of advanced grouting fluid and advanced pipe shed grouting fluid; (7) Advanced grouting construction; (8) Advanced pipe shed construction. The present invention performs effective reinforcement and treatment by performing advanced grouting on the tunnel face, avoids construction risks, improves construction efficiency, and reduces construction costs.

Description

technical field [0001] The invention relates to the technical field of tunnel engineering construction, in particular to an advanced grouting method for tunnel faces in rich cement rock formations. Background technique [0002] Tunnel projects are generally underwater, underground or in mountains. Compared with other construction projects, the construction of cement-rich tunnels has more stringent requirements for the design of most tunnel entrances, and its characteristic is high water pressure, so the construction process Permeability and invasiveness must be considered in the process. Mudstone is rich in clay minerals, which will make most of the strength of this rock lower. It is a kind of sedimentary rock that is easy to disintegrate, weak and expand. The rheology and swelling of mudstone are its main geological characteristics. It is because the mudstone itself has low strength and is rich in water, resulting in rheology. In the actual construction process, problems ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/10C04B28/14
CPCC04B28/144C04B2111/00724E21D11/105C04B14/06C04B7/02C04B14/104C04B18/08C04B22/00C04B18/141C04B7/32C04B24/122C04B22/062C04B22/147C04B22/14C04B24/383C04B24/281C04B24/18
Inventor 刘翔邓小卫刘飞翔谢晓波李建刘化平胥俊玮陈敏刘德安杨文国赵建斌彭学军阳军生汤宇胡晓方文应彭静段磊曾玉德王圣彭雨杨方星桦李强何林云程栋杨海龙凌涛
Owner RAILWAY NO 5 BUREAU GRP FIRST ENG CO LTD
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