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Anti-settling mud and grouting slurry for shield construction
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A shield and anti-sinking technology, used in shaft equipment, shaft lining, mining equipment, etc., can solve the problems of low safety protection, high price, and inability to quickly form sufficient strength.
Active Publication Date: 2021-04-09
CHINA TIESIJU CIVIL ENG GRP CO LTD
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[0003] At present, commercially available mud materials are often used to fill the gaps in the upper periphery of the shield machine to achieve the effect of supporting and preventing settlement. However, these mud materials are not only expensive but also too weak and non-solidifying. They can only become thick mud and cannot Rapidly develops sufficient strength, insufficient protection for particularly weak formations
[0004] In addition, materials such as bentonite mud used to build mud films currently used in shield tunneling under pressure to open and change tools can form mud films, but the strength of the established mud films is not high, which is safe for workers who change tools under pressure. low protection
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Embodiment 1
[0023] Grouting grout for shield construction
[0024] It is composed of liquid A and liquid B. Liquid A is composed of anti-sedimentation mud and water for shield tunneling construction, and the mass ratio of anti-settling mud and water for shield tunneling construction is 1.2:1. Liquid B is water glass. The mass percentage of grouting grout for construction is 5%;
[0025] The anti-settling mud for shield construction consists of the following components in parts by weight: calcium-based bentonite 35, sodium-based bentonite 35, lime 27, cement 2, carboxymethyl cellulose 0.8, polyacrylamide 0.2.
Embodiment 2
[0027] Grouting grout for shield construction
[0028] It is composed of liquid A and liquid B. Liquid A is composed of anti-sedimentation mud and water for shield tunneling construction, and the mass ratio of anti-settling mud and water for shield tunneling construction is 1.5:1. Liquid B is water glass. The mass percentage of grouting grout for construction is 7%;
[0029] The anti-sedimentation mud for shield construction consists of the following components in parts by weight: calcium-based bentonite 34, sodium-based bentonite 31, lime 24, cement 3.3, carboxymethyl cellulose 0.5, polyacrylamide 0.3.
Embodiment 3
[0031] Grouting grout for shield construction
[0032] It is composed of liquid A and liquid B, liquid A is composed of anti-sedimentation mud and water for shield tunneling construction, and the mass ratio of anti-settling mud and water for shield tunneling construction is 0.55:1, liquid B is water glass, and liquid B occupies the shield The mass percentage of grouting grout for construction is 4.5%;
[0033] The anti-sedimentation mud for shield construction consists of the following components in parts by weight: calcium-based bentonite 32, sodium-based bentonite 30, lime 30, cement 4, carboxymethyl cellulose 1.0, polyacrylamide 0.4.
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Abstract
The invention discloses an anti-settling mud for shield construction and a grouting slurry for shield construction. The anti-settling mud for shield construction comprises calcium-based bentonite, sodium-based bentonite, lime, cement, and cellulose derivatives. objects, polymers. The grouting slurry for shield construction includes A liquid and B liquid, the A liquid includes anti-settling mud and water for shield construction, and the B liquid is water glass. The invention is non-toxic and environment-friendly, can be used for filling the gaps in the upper periphery of the shield machine, and can also be used for building a protective mud film before the shield is opened with pressure to change the tool, and has good anti-sedimentation effect and high mud film strength.
Description
technical field [0001] The invention relates to the field of shield construction materials, in particular to an anti-settling mud and grouting slurry for shield construction. Background technique [0002] With the continuous development of the city, the upsurge of urban subway construction is on the rise. However, at present, shield tunnels are constructed to pass through soft strata, strata with poor soil self-stability, and pass through buildings under complex geological conditions. For the safety of structures and construction workers, reinforcement and improvement methods are usually carried out for geologically complex and unfavorable areas and areas passing through structures, such as: using high-pressure grouting methods such as MJS, CCP, JSG, and CJG on the ground, or advancing into the cave Inject cement slurry and other measures. [0003] At present, commercially available mud materials are often used to fill the gaps in the upper periphery of the shield machine t...
Claims
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Application Information
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