Composite type TBM synchronous grouting material and grouting method

A technology of synchronous grouting and grouting materials, which is applied in the direction of chemical instruments and methods, earthwork drilling, drilling compositions, etc., can solve the problems of segment out-of-roundness, which is not conducive to the stability of the three-dimensional position of the segment, and reduce the Fluidity, avoiding the expansion of surrounding rock cracks, and ensuring the effect of engineering quality

Inactive Publication Date: 2017-08-18
CHONGQING CONSTR ENG GRP +1
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  • Abstract
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Problems solved by technology

The engineering geology of the interval mainly belongs to the landform of structural denudation hills and slopes. The current terrain has small undulations and gentle terrain. The stratum is mainly composed of artificial plain fill, silty clay, pebble soil and sandy mudstone. The filling amount between the rocks is less than 50%, and the solidified layer of the consolidated slurry cannot be condensed quickly, and the segment can be effectively lifted and supported laterally, which is not conducive to the stability of the three-dimensional position of the segment after forming, resulting in Quality defects such as loss of roundness, sinking, and wrong platform

Method used

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  • Composite type TBM synchronous grouting material and grouting method
  • Composite type TBM synchronous grouting material and grouting method
  • Composite type TBM synchronous grouting material and grouting method

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Embodiment Construction

[0031] A composite TBM synchronous grouting method,

[0032] 1) Clean the pipeline of the grouting system;

[0033] 2), evenly add the grouting materials except the quick-setting agent, and continuously stir and mix the grouting materials to obtain the primary slurry;

[0034] 3) During the excavation process, when there is an annular gap between the segment and the formation, and between the segment and the shield tail shell, a liquid accelerator delivery pump is installed near the grouting system to mix the accelerator with the primary The slurry is injected into the annular gap;

[0035] 4) During the grouting process, the grout is injected into the annular gap in 4-6 strands;

[0036] 5) When dark grout is found at the TBM cutterhead, stop grouting.

[0037] In conjunction with the specific implementation scheme, this technical solution is further described:

[0038] A composite TBM synchronous grouting material, the grouting material is composed of the following weigh...

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Abstract

The invention discloses a composite type TBM synchronous grouting material and a grouting method. The technical scheme key point of the composite type TBM synchronous grouting material is that the grouting material is composed of raw materials, by weight, of 7%-15.3% of cement, 35%-47% of sand, 10%-16% of fly ash, 2.9%-3% of expansive soil, 0.7%-4% of an accelerator and the balance water. According to the composite type TBM synchronous grouting material, the solidification time is greatly shortened, the problem of insufficient grouting is solved, the operation efficiency is improved, and the engineering quality is ensured.

Description

[0001] 【Technical field】 [0002] The invention relates to a composite TBM synchronous operation, in particular to a composite TBM synchronous grouting material and a grouting method. [0003] 【Background technique】 [0004] The type of shield machine is a single-circle composite TBM, with a maximum excavation diameter of 6885mm. Due to the good self-stability of the surrounding rock in the tunnel section, the excavation surface does not need reinforced support. The excavation is carried out in an open mode, and the lining segment adopts high-precision steel molds The general-purpose lining wedge-shaped reinforced concrete segment produced, after the shield machine excavates, there will be a certain annular gap between the segment and the formation, and between the segment and the shield tail shell, in order to control the deformation of the formation, reduce settlement, and It is beneficial to improve the impermeability of the tunnel and the early stability of the segment lini...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10E21D9/06C04B28/00C09K8/467
CPCE21D11/10C04B28/00C09K8/467E21D9/0607E21D11/105C04B14/06C04B18/08C04B14/10C04B2103/12
Inventor 汪平黄小良李进王曙光汪岳健冉鹏吉伟李慧英
Owner CHONGQING CONSTR ENG GRP
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