Shield synchronous grouting

A synchronous grouting and shield technology, applied in the field of tunnel grouting, can solve the problems of insufficient fluidity and shrinkage resistance of slurry, failure to consider environmental protection and energy saving, insufficient stability and consolidation, etc., and achieve high shrinkage resistance. , good stability and consolidation, high fluidity

Inactive Publication Date: 2019-05-28
江苏蓝圈新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purpose of synchronous grouting is to fill the annular gap as soon as possible so that the segments can support the formation as soon as possible, prevent the ground from being deformed too much and endanger the safety of the surrounding environment, and at the same time act as a waterproof and structural reinforcement layer outside the segments. The problem is that the fluidity and shrinkage resistance of the slurry are insufficient, and the stability and consolidation are not enough, so that it can not be well injected into the formation through the shield support ring and the inner pipeline system of the shield tail. The use of materials has not taken into account environmental protection and energy saving , so it is imperative to realize a shield synchronous grouting that can solve such problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: Add 360 parts of water in the mixing drum of the mixer, and then add 100 parts of cement, 600 parts of sand, 150 parts of fly ash, 30 parts of heavy calcium powder, 1 part of cellulose ether, and 40 parts of nano-bentonite , 10 parts of desulfurized gypsum powder, 20 parts of silica fume, 10 parts of lime, and the cement uses 42.5R ordinary Portland cement to improve the corrosion resistance of the grouting stone body, so that the segment is wrapped in the corrosion-resistant grouting stone body In order to weaken the corrosion of groundwater to segmental concrete, the higher the viscosity of cellulose ether, the better the water retention. Since the cellulose structure contains hydroxyl and ether bonds, the oxygen atoms on the hydroxyl and ether bond groups associate with water molecules to form hydrogen bonds. Make free water into bound water and entangle the water, so as to play a role in water retention. The higher the viscosity of cellulose ether, the ...

Embodiment 2

[0018] Add 400 parts of water into the mixing drum of the mixer, and then add 130 parts of cement, 650 parts of sand, 180 parts of fly ash, 32 parts of heavy calcium powder, 1.2 parts of cellulose ether, 45 parts of nano-based bentonite, and desulfurized gypsum powder. 15 parts, 25 parts of silica fume, 15 parts of lime, 42.5R ordinary Portland cement is used as cement to improve the corrosion resistance of the grouting stone body, so that the segment is in the package of the corrosion-resistant grouting stone body, weakening the groundwater For the corrosion of segmental concrete, the higher the viscosity of cellulose ether, the better the water retention. Since the cellulose structure contains hydroxyl and ether bonds, the oxygen atoms on the hydroxyl and ether bond groups associate with water molecules to form hydrogen bonds, making free water become The higher the viscosity of cellulose ether, the better the water retention. Since the cellulose structure contains hydroxyl a...

Embodiment 3

[0021]Add 435 parts of water into the mixing drum of the mixer, and then add 150 parts of cement, 700 parts of sand, 210 parts of fly ash, 35 parts of heavy calcium powder, 1.5 parts of cellulose ether, 50 parts of nano-based bentonite, and desulfurized gypsum powder. 20 parts, 30 parts of silica fume, 20 parts of lime, and 42.5R ordinary Portland cement is used as cement to improve the corrosion resistance of the grouted stone body, so that the segment is in the package of the corrosion-resistant grouted stone body and weaken the groundwater. For the corrosion of segmental concrete, the higher the viscosity of cellulose ether, the better the water retention. Since the cellulose structure contains hydroxyl and ether bonds, the oxygen atoms on the hydroxyl and ether bond groups associate with water molecules to form hydrogen bonds, making free water become The higher the viscosity of cellulose ether, the better the water retention. Since the cellulose structure contains hydroxyl...

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PUM

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Abstract

The invention discloses shield synchronous grouting. The shield synchronous grouting is prepared from the following components in parts by weight: 100-150 parts of cement, 600-700 parts of sand, 150-210 parts of flyash, 30-35 parts of heavy calcium powder, 1-1.5 parts of cellulose ether, 40-50 parts of sodium-based bentonite, 20-40 parts of admixture, 10-20 parts of desulphurization gypsum powder,550-650 parts of water, 20-30 parts of silicate powder and 10-20 parts of lime. The slurry prepared with the shield synchronous grouting has high flowability and shrinkage resistance and favorable stability and cohesion, is injected into stratum through a shield support ring and a shield tail inner pipeline system, heavily uses industrial waste of flyash at the same time, and is environmentally friendly. 42.5 R ordinary silicate cement is adopted as a synchronous grouting material to improve corrosion resistance of a grouting stone body, enable a pipe segment to be coated by corrosion-resisting grouting stone body, reduce the corrosion of ground water on pipe segment concrete, and fill an annular gap as soon as possible. Therefore, the pipe segment supports the stratum as early as possible, and deformation of the ground is prevented from being too great to endanger surrounding environment.

Description

technical field [0001] The invention relates to the technical field of tunnel grouting, in particular to a shield synchronous grouting. Background technique [0002] Shield synchronous grouting is applied while the shield tunnel is advancing, and its main function is to control the settlement of the ground and protect the tunnel from displacement. When the scutellum is separated from the shield tail, a circular gap with a width of about 3.5 mm will be formed between the soil body and the segment. The purpose of synchronous grouting is to fill the annular gap as soon as possible so that the segments can support the formation as soon as possible, prevent the ground from being deformed too much and endanger the safety of the surrounding environment, and at the same time act as a waterproof and structural reinforcement layer outside the segments. The problem is that the fluidity and shrinkage resistance of the slurry are insufficient, and the stability and consolidation are not...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
Inventor 王兴文徐荣平步晖涵
Owner 江苏蓝圈新材料股份有限公司
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