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Shield grouting method based on shield muck improvement under water-rich sand layer condition

A water-rich sand layer and muck soil improvement technology, which is applied to earth square drilling, underground chambers, shaft equipment, etc., can solve problems such as unbalanced soil pressure mechanism, environmental pollution by waste dregs, and occupation of land resources.

Active Publication Date: 2021-09-10
中铁(上海)投资集团有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) A large amount of waste muck is produced, occupying land resources
[0005] (2) A large amount of waste residue pollutes the environment
[0006] (3) Unbalanced soil pressure mechanism

Method used

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  • Shield grouting method based on shield muck improvement under water-rich sand layer condition
  • Shield grouting method based on shield muck improvement under water-rich sand layer condition
  • Shield grouting method based on shield muck improvement under water-rich sand layer condition

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Embodiment Construction

[0032] Below, the present invention will be further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of not conflicting, the various embodiments described below or the technical features can be combined arbitrarily to form new embodiments. .

[0033] Such as Figure 1 to Figure 2 As shown, a shield grouting method based on shield dregs improvement under the condition of water-rich sand layer includes the following steps:

[0034] Step a, according to the geological conditions of the tunnel and the surrounding environmental conditions, the shield tunnel is excavated in the earth pressure balance mode; the soil cut by the cutter is filled with the soil cabin, and the pressure is established by the advancement and extrusion of the shield machine, and the earth pressure is used to build up the pressure. It is balanced with the soil pressure and water pressure of the working surface stratum; at ...

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Abstract

The invention discloses a shield grouting method based on shield muck improvement under the water-rich sand layer condition, and belongs to the technical field of constructional engineering. Shield grouting ingredients in a soil bin are stirred through a concrete stirring machine, stirred slurry is transferred to a trolley slurry tank through a slurry vehicle, the slurry in a tank car is stirred evenly, and a transmission pump is started to start pumping the slurry into a slurry tank on a shield tunneling machine from the tank car; the shield tunneling machine needs to conduct synchronous grouting in the normal propelling process of each link so as to guarantee compactness of building gaps; and shield grouting can be carried out in a synchronous grouting manner and a secondary supplementary grouting manner, synchronous grouting is carried out along with tunneling through a synchronous grouting system at the same time, and secondary supplementary grouting is carried out through a segment grouting hole behind a shield tail by utilizing a supplementary grouting system. According to the shield grouting method, waste muck can be improved, a good soil pressure balance mechanism is established, and environmental pollution and resource waste are reduced.

Description

technical field [0001] The invention relates to the technical field of construction engineering, in particular to a shield tunnel grouting method based on shield tunnel dreg improvement under the condition of water-rich sand layer. Background technique [0002] In shield tunneling construction, the excavation surface soil needs to be improved in order to facilitate the excavation of the shield machine. Improve the dregs by adding water, penetrating soil or foaming agent to improve the fluidity of the dregs, so that the dregs cut by the shield machine have good flow plasticity, suitable consistency, low water permeability and small frictional resistance. In order to meet the ideal working conditions when adopting different excavation modes under different geological conditions. The construction of shield tunnels will produce a large amount of waste muck. On the one hand, it requires a specific site for storage, which occupies land resources. At the same time, it needs to be ...

Claims

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Application Information

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IPC IPC(8): E21D9/06E21D9/12E21D11/10C04B28/00C04B111/70
CPCE21D9/06E21D9/0678E21D9/0685E21D9/124E21D9/12E21D9/0671E21D11/10C04B28/00C04B2111/70C04B14/104C04B18/08C04B22/064C04B22/143C04B22/10C04B22/124C04B18/16Y02W30/91
Inventor 张斌李国鹏苏科范喜德方朝刚李波翟洪志钟明汪优梁绍华赵晓薇
Owner 中铁(上海)投资集团有限公司
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