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Real-time monitoring and grouting reinforcement method for weak surrounding rock tunnel building

A technology of grouting reinforcement and real-time monitoring, applied in tunnels, tunnel linings, earthwork drilling, etc., can solve problems such as inability to accurately evaluate, and achieve the effects of safe and controllable measures, reduction of personnel losses, and reasonable measures

Active Publication Date: 2016-06-08
BEIJING MUNICIPAL CONSTR +1
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the disadvantage that the grouting effect of tunnel construction with weak surrounding rock cannot be accurately evaluated, and provide a real-time monitoring grouting reinforcement method for tunnel construction with weak surrounding rock, which can quickly and accurately monitor the effect of the grouting reinforcement method in a timely manner. evaluation, so as to improve the safety of weak surrounding rock tunnel construction, reduce unnecessary personnel losses, and the measures are reasonable and safe and controllable

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  • Real-time monitoring and grouting reinforcement method for weak surrounding rock tunnel building
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  • Real-time monitoring and grouting reinforcement method for weak surrounding rock tunnel building

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so as to facilitate the understanding of engineers and technicians.

[0031] like figure 1 , figure 2 , image 3 As shown, the present invention provides a kind of real-time monitoring grouting reinforcement method that weak surrounding rock tunnel is built, and this method comprises the following steps:

[0032] Step 1. When the tunnel completes the excavation task of about 50cm in one cycle, stop the task and prepare the wet spraying machine.

[0033] Step 2. Use net spray to seal the face of the face, drill holes along the face with a pick or a rock drilling jumbo, and drive in small conduits in advance. The small conduits are driven in along the arch and core soil of the face, and The distance between the small catheters is 0.3-0.5m, and the advanced small catheters penetrate into the face of the operation about 1.5m-3m.

[0034] Step 3....

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Abstract

The invention discloses a real-time monitoring and grouting reinforcement method for weak surrounding rock tunnel building and belongs to the technical field of tunnel engineering. The method comprises the following steps that tunneling is stopped after one cycle tunneling task is finished for a tunnel; a tunnel face is closed through net spraying, a hole is drilled along the tunnel face, and an advanced small pipe is driven in; grouting reinforcement is carried out on the tunnel face through the advanced small pipe; the grouting amount is controlled through grouting pressure, and grouting is finished after the final grouting pressure reaches 2-3 MPa; after grouting is finished, a rock core is drilled in the grouting body, and the grouting condition is examined; the grout filling condition is observed, and the rock core is inspected; if the rock core strength and the grout filling condition reach construction standards, next operation cycle is carried out. According to the method, the safety of weak surrounding rock tunnel building can be improved, unnecessary personnel losses are reduced, measures are reasonable, and safety and controllability are achieved.

Description

technical field [0001] The invention relates to a real-time monitoring grouting reinforcement method for constructing tunnels with weak surrounding rocks, and belongs to the technical field of tunnel engineering. Background technique [0002] At present, with the increase of national infrastructure investment and construction, subway projects and mountain tunnel projects are gradually increasing, and a large part of these tunnel projects involve tunnel construction in weak surrounding rocks. The self-supporting ability of weak surrounding rock is relatively weak, or even has no self-supporting ability. Therefore, the most important thing for construction in weak surrounding rock is to improve the self-supporting ability of surrounding rock. As a feasible method of stabilizing the face, grouting to strengthen the ground has been widely used in the field of tunnel construction. [0003] However, how to control the quality of grouting and how to control the interval between g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10
CPCE21D11/10E21D11/105
Inventor 孔恒王文正黄明利杨建华李琳刘学义石国伶韩雪刚张艳秋马虹霞郑雪梅潘政
Owner BEIJING MUNICIPAL CONSTR
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