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Thick sand layer milling equal-thickness cement soil continuous steel wall forming and slurry parameter control method

A parameter control, cement-soil technology, applied in sheet pile wall, construction, infrastructure engineering, etc., can solve the problem of unable to reach the effective insertion depth of rigid skeleton.

Active Publication Date: 2021-10-22
SHANGHAI FOUND ENG GRP
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Problems solved by technology

Cannot meet the requirements of the effective insertion depth of the stiff skeleton

Method used

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  • Thick sand layer milling equal-thickness cement soil continuous steel wall forming and slurry parameter control method
  • Thick sand layer milling equal-thickness cement soil continuous steel wall forming and slurry parameter control method
  • Thick sand layer milling equal-thickness cement soil continuous steel wall forming and slurry parameter control method

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific implementations.

[0032] like Figure 1 to Figure 6 As shown, the construction control method of the present invention is mainly used for thick sand layer milling and other thick cement-soil continuous steel wall A into wall and mud parameter control, and the concrete steps of the method are as follows:

[0033] S1: Pre-construction preparation and new pulp mixing:

[0034] The preliminary preparations mainly include the construction of the guide wall, the debugging and alignment of the milling equipment, and the mixing of fresh mud. Fresh slurries include bentonite slurries and cement slurries. The new bentonite slurry can be put into use only after 24 hours of fermentation. The new pulp is repeatedly stirred during the fermentation process to ensure uniform and full fermentation. After fermentation, the specific gravity of bentonite slurry is controlle...

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Abstract

The invention relates to a thick sand layer milling equal-thickness cement soil continuous steel wall forming and slurry parameter control method. The method comprises the following steps: (1) conducting early-stage construction preparation and new slurry mixing; (2) milling and sinking for the first time; (3) lifting for the first time; (4) milling and sinking for the second time; (5) lifting and spraying for the second time; and (6) inserting profile steel, shifting the next groove section for construction, and repeating the steps from S1 to S6 till construction of an enclosure body is completed. According to the scheme, a wall forming mode of 'two-time milling and three-time spraying (two-time groove milling and three-time spraying)' is adopted for the milling type cement-soil stirring wall of a thick sand stratum, a wall forming and slurry parameter control method in a double-slurry mode under targeted different sections and procedures of bentonite and cement slurry is adopted, and the wall forming uniformity of the cement-soil wall and the insertion of the lock catch profile steel under the action of dead weight are effectively ensured. The problems of wall forming uniformity of the underground cement continuous steel wall in the thick sand stratum and insertion of the profile steel under the dead load are solved, and guarantee is provided for implementation of the underground continuous steel wall process.

Description

technical field [0001] The invention relates to a foundation pit engineering enclosure construction, in particular to a method for forming a wall by milling an equal-thickness cement-soil continuous steel wall with a ground-thick sand layer and a construction control method for mud parameters. Background technique [0002] The continuous steel wall of the groundwater soil of equal thickness, compared with the traditional ground wall cement soil instead of concrete, and the continuous locking section steel instead of the original wall steel bar. It has the characteristics of convenient construction, small footprint, and suitable for urban areas with high requirements for construction speed and environmental impact. At present, active research and exploration are also being carried out in China. [0003] Among them, Dongtong Geotechnical Technology (Hangzhou) Co., Ltd. applied for "a kind of foundation pit enclosure cement-soil rigid wall CN206034455U", and Shanghai Foundatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D15/02E02D5/18E02D19/18
CPCE02D15/02E02D5/187E02D19/18E02D2300/0023
Inventor 李耀良郭宏斌李吉勇罗云峰张哲彬沈斌邹铭朱韦亮黄周琰陈志强杨子松
Owner SHANGHAI FOUND ENG GRP
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