A combined support method of grading in soft stratum with fluid-plastic flushing fill

A technology of soft stratum and scouring soil, which is applied in the field of grading combined support of fluid-plastic scouring soil and weak strata to achieve the effects of reducing construction cost, shortening the overall construction period and fast construction speed

Inactive Publication Date: 2018-03-02
BCEG CIVIL ENG +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a kind of flow-plastic-shaped flush-fill soil to overcome the weak stratum condition of the flow-plastic-shaped flush-fill soil, and adopt a small slope excavation for slope support, so as to solve the stability problem of the slope of the foundation pit. Grading Support Method for Weak Stratum

Method used

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  • A combined support method of grading in soft stratum with fluid-plastic flushing fill
  • A combined support method of grading in soft stratum with fluid-plastic flushing fill

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Embodiment

[0025] Embodiment: Take a certain underground space project in Suzhou as an example below, and further illustrate the use method of the present invention in conjunction with the accompanying drawings. The ground elevation is 2.5 meters, and the excavation depth of the foundation pit is 17.6 meters. The main soil layers in the excavation range of the foundation pit are: ① -1 plain fill, ①-2 flush fill, ③-1 clay, ③-2 silty clay, ④-1 silt, ④-2 silty clay sandwiched with silt, ⑤-1 silty clay layer. Among them, the ①-2 flush filling soil layer is mainly mixed with mud and floating mud at the bottom of the lake, with a water content close to saturation, in a flow-plastic shape, with extremely poor geological conditions, widely distributed, and a depth of about 3-8m. Terrain.

[0026] like figure 1 As shown, adopting a kind of fluid-plastic flushing filling soft strata grading combined support method of the patent of the present invention mainly includes the following steps:

[002...

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Abstract

The invention discloses a flow-plastic-shaped flushing and filling soil weak stratum sloping combination support method. The method comprises the steps that a steel sheet pile is inserted and piled on the slope top of a foundation pit to a relatively stable soil stratum; for a slope body, a round log pile is utilized to be inserted into the relatively stable soil stratum; and high and large slope support is conducted by combining soil nailing wall anchoring and shotcreting support. According to the flow-plastic-shaped flushing and filling soil weak stratum step-slope combination support method, a conventional compound soil nailing wall support method is innovated, various process combination support under the condition of the small slope ratio is achieved with minimum input, and the safety and stability of a slope are guaranteed; under the condition of a flow-plastic-shaped flushing and filling soil weak stratum, the method of sloping support conducted with the multiple process combination has the advantages of high safety, simple process, rapid construction, low cost and the like; and the engineering of foundation pit sloping excavation is conducted under the condition of weak geology, and good promotional value is achieved.

Description

technical field [0001] The invention relates to the technical field of building foundation pit engineering, in particular to a slope grading combined support method for soft strata of fluid-plastic flushing fill. Background technique [0002] The foundation pit support is to ensure the safety of the underground structure construction and the surrounding environment of the foundation pit, and the support, reinforcement and protection measures are adopted for the side wall of the foundation pit and the surrounding environment. The industry standard of the People's Republic of China "Technical Regulations for Building Foundation Pit Support" JGJ120-2012 defines the foundation pit support as follows: in order to protect the safety of the underground main structure construction and the surrounding environment of the foundation pit, temporary supports, Measures for reinforcement, protection and groundwater control. Common forms of foundation pit support mainly include: 1. Pile ro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D17/04E02D17/20E02D5/76E02D3/10E02D19/08
CPCE02D3/10E02D5/76E02D17/04E02D17/20E02D17/207E02D19/08E02D2300/0029E02D2300/0071
Inventor 刘向科唐永福游大江许世雄吴亦舜崔江余张志强左其和龚亚峰闻和咏
Owner BCEG CIVIL ENG
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