A shield grouting wrapping method

A technology of grouting and shield tunneling, which is applied in chemical instruments and methods, earth drilling, building construction, etc., can solve problems such as sealing failure, and achieve the effect of ensuring smooth tunneling, ensuring the tunneling process, and good ground support and reinforcement effects

Active Publication Date: 2021-09-03
CHINA CREC RAILWAY ELECTRIFICATION BUREAU GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, the current shield tail seal only relies on the shield tail brush to fill grease, and the ring formed after the segment is installed is in an eccentric state with the inherent ring of the shield tail seal brush, and the seal will fail

Method used

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  • A shield grouting wrapping method
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Embodiment Construction

[0033] Below in conjunction with accompanying drawing, specific embodiment of the present invention is described in detail, but it should be understood that protection scope of the present invention is not limited by specific embodiment.

[0034] Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.

[0035] The present invention provides a shield grouting wrapping method, comprising the following steps:

[0036] (1) ratio:

[0037] The mixing ratio of modified water glass slurry is: the volume ratio of water glass stock solution (37Be) to water is 1:1, the volume ratio of phosphoric acid stock solution to water is 1:16, and the volume ratio of water glass solution to phosphoric acid solution is 1:1;

[0038] (2) stirring:

[0039] When mix...

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Abstract

The invention provides a shield grouting encapsulation method. The water glass solution and the phosphoric acid solution are prepared according to the ratio of mixing, and the double liquid slurry injection system of the shield machine is used to inject the shield body from the radial grouting hole reserved around the shield body. , form a "protective layer" around the shield body to prevent the slurry from escaping to the shield body when the double slurry is backfilled and reinforced, causing the body to "lock up", and support and strengthen the soil around the shield body; set up a sealing failure device, An effective seal is formed between the shield tail and the segment to prevent muddy water from flowing into the shield machine and ensure the smooth excavation process of the shield machine.

Description

technical field [0001] The present invention relates to tunnel and underground engineering, more specifically, relates to a kind of shield method tunnel construction method. Background technique [0002] In order to ensure the safety of construction and surface construction during the process of entering and exiting tunnels, crossing composite strata, and passing through structures, shields often use cement-sodium silicate double slurry to reinforce the soil or cavity to prevent Surface deformation is too large. However, when double-fluid grout is injected, the grout will flow around the shield body and lock the shield machine after solidification, so the shield machine should be "wrapped" for protection before grouting. [0003] At present, the currently available similar technical construction method is the mud-reducing construction method. Relying on the mud-restraining effect material that never solidifies and has a certain bearing capacity, the mud-restraining effect ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/06E21D11/10C09K17/12C09K103/00
CPCC09K17/12C09K2103/00E21D9/0607E21D9/0635E21D11/105
Inventor 王炜李清宪李康康幸智军祁宝成吴彦君王宁朱辉辉
Owner CHINA CREC RAILWAY ELECTRIFICATION BUREAU GRP
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