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Muck improvement technology for earth pressure balance shield construction in sandy cobble stratum

A technology for earth pressure balance shield tunneling and muck soil improvement, which is applied in foundation structure engineering, earth square drilling, soil protection, etc. It can solve the problem that there are few dregs soil improvement tests in sandy pebble strata, and it cannot truly reflect the characteristics of the original soil and the construction environment impact and other issues, to achieve the effect of simple improvement process

Inactive Publication Date: 2015-12-30
BEIJING NO 4 MUNICIPAL CONSTR ENG +1
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0005] The above test and evaluation methods are aimed at specific sampled soil, and cannot truly reflect the characteristics of the undisturbed soil and the influence of the construction environment
At the same time, there are few soil improvement tests in sand and pebble formations considering the influence of site factors.

Method used

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  • Muck improvement technology for earth pressure balance shield construction in sandy cobble stratum
  • Muck improvement technology for earth pressure balance shield construction in sandy cobble stratum
  • Muck improvement technology for earth pressure balance shield construction in sandy cobble stratum

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Embodiment Construction

[0019] This specific embodiment has a simple improvement process, and the improved muck can prevent the dregs from forming mud cakes on the cutter head, accumulating in the soil cabin, blocking the cabin, and causing blockage, gushing, and wear of the cutter head and cutters at the screw conveyor. Wait.

[0020] In order to solve the existing problems of the background technology, the present invention adopts the following technical solutions: its improvement process is as follows:

[0021] 1. Selection of land improver: When constructing in sand and pebble strata, in order to avoid a series of construction problems caused by poor plastic flow of the soil, the usual method is to inject a certain proportion of soil into the excavation surface and the soil chamber There are many types of soil improvement materials used in earth pressure balance shield tunneling, and four types are commonly used, among which foam and bentonite are the most Usually, the formations suitable for fo...

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PUM

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Abstract

The invention discloses a muck improvement technology for earth pressure balance shield construction in a sandy cobble stratum and relates to the technical field of stratum shield construction. The improvement technology comprises the following steps: 1, selection of a land improver; 2, land improvement; 3, construction quality control; 4, a soil mass improvement effect and analysis. The improvement technology is simple, and after improvement, muck can be prevented from forming mud cakes on a cutter head, being accumulated in an earth bin, blocking the bin and causing blocking, spewing, wear of the cutter head and a tool and the like at a screw conveyor.

Description

Technical field: [0001] The invention relates to the technical field of stratum shield construction, in particular to an improvement process for earth pressure balance shield construction dregs in sand and pebble strata. Background technique: [0002] During the construction of the earth pressure balance shield, how to prevent the dregs from forming mud cakes on the cutter head, accumulating in the soil cabin, blocking the cabin, and causing blockage, gushing, and wear of the cutter head and tools at the exit of the screw conveyor is still an issue at present. The main difficulties faced in the construction of shield tunneling. [0003] In the construction of sand and pebble formations, due to the unstable mechanical properties of the formation, high content of pebbles and gravel, large gaps between particles, and no cohesion, the excavated soil has poor plasticity, shield thrust, torque, cutterhead, and cutters. The wear and tear of the screw conveyor is serious, the advan...

Claims

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Application Information

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IPC IPC(8): E21D9/08E21D9/093E21D9/12E02D3/12
Inventor 郭彩霞孔恒陈希林翟永山史磊磊王文治
Owner BEIJING NO 4 MUNICIPAL CONSTR ENG
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