Grouting slurry and grouting process for underground excavation water stop reinforcement of subway tunnel

A cement slurry and slurry technology, which is used in tunnels, tunnel linings, underground chambers, etc., can solve the problems of not forming experimental proportioning data, failing to achieve rapid water stop, etc., to improve the excavation environment and quickly and effectively stop water. , Good water stop effect

Inactive Publication Date: 2019-05-10
URBAN MASS TRANSIT ENG CO LTD OF CHINA RAILWAY 11TH BUREAU GRP
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AI Technical Summary

Problems solved by technology

However, the traditional single-slurry grouting often fails to achieve rapid water stop and improve the geological environment of the working face, and there is no mature experimental ratio data for each grouting grout composition

Method used

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  • Grouting slurry and grouting process for underground excavation water stop reinforcement of subway tunnel
  • Grouting slurry and grouting process for underground excavation water stop reinforcement of subway tunnel
  • Grouting slurry and grouting process for underground excavation water stop reinforcement of subway tunnel

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Embodiment Construction

[0023] specific implementation plan

[0024] Below in conjunction with embodiment the present invention is further described.

[0025] Embodiment Aiming at a subway construction station, the station is 323.6 meters long, the effective platform center mileage is K43+642.004, the standard section width is 22.1 meters, the effective platform is 186 meters long, the platform is 13 meters wide, and the thickness of the vault cover is about 12.5m. The buried depth is about 28.4m. The main structure is an underground two-storey straight wall and three-arch structure, which is constructed using the PBA method of underground excavation and the reverse construction method. The upper floor is the station hall floor, and the lower floor is the platform floor, which is composed of side walls, beams, slabs, columns and other components. Both sides of the station are connected to the section of mining law. There are mainly 4 layers of water in the station area, phreatic water, 2 layers of...

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Abstract

The invention provides grouting slurry and a grouting process for underground excavation water stop reinforcement of a subway tunnel. The grouting process specifically comprises the following steps: firstly, grouting by adopting water glass-phosphoric acid slurry to achieve a temporary water stop effect; secondly, grouting by adopting cement-water glass double liquid slurry to achieve the effect of stopping water and reinforcing a stratum, and determining the proportion of the prepared slurries, specifically, in the water glass-phosphoric acid slurry, the concentration of water glass is 25 Be', the volume ratio of water to acid is 25 (85% phosphoric acid raw material), and the volume ratio of a phosphoric acid solution to the water glass solution is 1:1 for grouting; in the cement-water glass double liquid slurry, the water cement ratio is 1:1, the baume degree of water glass is 20Be', and the volume ratio of the cement slurry to the water glass is 1:0.75. The grouting process is suitable for subway underground excavation engineering under complex geological conditions such as a water-containing silty-fine sand layer, and the effects of quickly and effectively stopping water, reinforcing a soil layer and improving the excavation environment can be achieved.

Description

technical field [0001] The invention relates to the field of subway tunnel excavation water-stop engineering, in particular to a grouting slurry and a grouting process for underground excavation water-stop reinforcement of subway tunnels; the grouting process is applied to complex geological conditions such as water-containing fine sand layers Next, it is a subway underground excavation project that quickly and effectively stops water, strengthens the soil layer, and improves the excavation environment. technical background [0002] With the rapid development of my country's urban economy, the density of urban population continues to increase, which brings great pressure on traffic travel. In order to alleviate the phenomenon of ground traffic congestion, major cities in my country build subway tunnels, which are usually divided into underground excavation and open tunnels. Excavation and shield construction. However, in subway underground excavation projects, unfavorable ge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E21D11/10E21D11/38
Inventor 刘振帅夏国松龙华东刘波杨振史凯李俊威
Owner URBAN MASS TRANSIT ENG CO LTD OF CHINA RAILWAY 11TH BUREAU GRP
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