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Radial grouting construction method of one-hole dual-pipe tunnel

A construction method and grouting technology, applied in tunnels, tunnel linings, earth-moving drilling, etc., can solve the problems of poor orifice sealing, leakage of grouting, poor grouting effect, etc. The effect of spreading

Active Publication Date: 2018-09-14
CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP NO 4 ENG
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AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problems of grout leakage and poor grouting effect due to poor plugging of the orifice, and further provides a radial grouting construction method for a one-hole double-pipe tunnel

Method used

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  • Radial grouting construction method of one-hole dual-pipe tunnel
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  • Radial grouting construction method of one-hole dual-pipe tunnel

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Embodiment Construction

[0029] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0030] see Figure 1-Figure 7 Description, a radial grouting construction method for a one-hole double-pipe tunnel, the method is carried out according to the following steps:

[0031] Step 1. Drilling. The bottom of the tunnel is drilled with a down-the-hole machine. After the initial support of the inverted arch at the bottom of the tunnel is completed, the holes are laid out. The side walls and arches are drilled with a drill bit air gun. After the drilling is completed, they are washed with high-pressure water. no debris;

[0032] Step 2. Install the grouting pipe. The grouting pipe 1 is a high-pressure pipe, and two are buried. One grouting pipe 1 is arranged in a full hole. A grouting pipe head of a certain length is reserved for the orifice, and a plum blossom hole of a certain diameter is opened on the pipe body. , t...

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Abstract

The invention discloses a radial grouting construction method of a one-hole dual-pipe tunnel, relates to a grouting construction method, and solves the problems of mortar leakage because the hole opening is not blocked tightly and poor grouting effect. The method comprises the following steps: 1, drilling, namely drilling at the bottom of the tunnel by a down-the-hole machine; 2, mounting groutingpipes, wherein the grouting pipes are high-pressure pipes, and embedding the two grouting pipes; 3, sealing the hole opening, plugging compactly in the area at a certain depth in the hole opening byusing an anchoring agent; 4, performing grouting, using quick joints in the grouting, inserting the quick joints to grouting pipe heads of the embedded grouting pipes and fixedly sealing; and 5, performing detection and acceptance, taking cores to check filling conditions, drilling to take sand cores by a core taking driller, observing the filling conditions of mortar, and further checking the water inflow in a measuring hole, and carrying out a water injection test to test water permeability coefficients. The construction method disclosed by the invention is used in grouting construction of railway tunnels.

Description

technical field [0001] The invention relates to a grouting construction method, in particular to a radial grouting construction method for a one-hole double-pipe tunnel. Background technique [0002] In the tunnel grouting construction, the traditional construction technology: the orifice pipe and the ball valve form the grouting device, and the orifice pipe Steel pipe with a length of 1.5m. The orifice pipe and the ball valve are welded through a variable-diameter steel pipe, and the other end is connected with the rubber pipe of the grouting machine. Orifice pipe installation: The orifice stopper is lead oil hemp wire, which is tightly wound on the steel pipe in a cone shape, the diameter of the middle part is 1 cm larger than the diameter of the borehole, and the length of the stopper is 25 cm. Screw the well-finished orifice pipe into the drilling hole along the winding direction of the hemp silk until it is tightened, and then drive it in with a sledgehammer. In thi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E21D11/10
CPCE21D9/001E21D11/105
Inventor 孙志远韩兆军盖青山王小红张龙赵小兵
Owner CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP NO 4 ENG
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