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Cement-soil wall continuous arch structure used for strengthening weak soil in passive region of foundation pit and strengthening method

A cement-soil wall and passive zone technology, which is applied in the engineering field, can solve the problems of low tensile strength of cement-soil and achieve strong anti-sliding ability, cost-saving and economical effects

Active Publication Date: 2015-07-22
WUHAN SURVEYING GEOTECHN RES INST OF MCC
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AI Technical Summary

Problems solved by technology

Due to the low tensile strength of cement soil, this type of structural reinforcement method must be reinforced with sufficient width to meet the requirements

Method used

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  • Cement-soil wall continuous arch structure used for strengthening weak soil in passive region of foundation pit and strengthening method
  • Cement-soil wall continuous arch structure used for strengthening weak soil in passive region of foundation pit and strengthening method

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with embodiment.

[0016] see figure 1 and figure 2 , a foundation pit passive zone reinforcement structure disclosed by the present invention includes: skirt wall 2 , arched wall 3 and pier 4 . Construct the passive area first to reinforce the cement-soil structure, and then construct the support piles. The skirt wall 2 is more than two rows of interlocking cement-soil mixing piles, which are arranged in the bottom of the foundation pit support row pile 1 (underground continuous wall) corresponding to the side of the foundation pit, and one side is connected with the foundation pit support The row of piles 1 (diaphragm wall) overlaps, and the other side engages with the arched wall 3.

[0017] The present invention is further configured as follows: the arched wall 3 is more than two rows of cement-soil mixing piles interlocking with each other, which are arranged in the bottom of the f...

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Abstract

The invention discloses a cement-soil wall arch structure used for strengthening weak soil in a passive region of a foundation pit. The cement-soil wall arch structure is good in stress performance, strong in anti-skidding ability, high in economic efficiency and quite suitable for strengthening a weak soil layer in the passive region of the foundation pit. The novel cement-soil wall arch structure comprises a skirt wall, arch walls and piers. The skirt wall, the arch walls and the piers are all formed by wet-sprayed stirring piles or dry-sprayed stirring piles which are mutually meshed. According to the working mechanism of the cement-soil wall arch structure, pressure of the soil on an active side of the foundation pit is transmitted to supporting protective piles (continuous walls), the supporting protective piles (the continuous walls) transmit the pressure to the skirt cement-oil wall in the passive region, and the skirt cement-soil wall transmits the pressure to the continuous arch cement-oil walls which are connected together through the piers. The cement-soil wall arch structure can fully achieve the anti-pressure performance and the anti-shearing performance of cement soil, and has the advantages of being good in stress effect and cost saving.

Description

technical field [0001] The invention relates to the technical field of engineering, and is a novel cement-soil structural reinforcement method for soft soil reinforcement in passive areas of foundation pits. Background technique [0002] With the development of urban construction, high-rise buildings are gradually increasing, and urban buildings are becoming more and more dense. Due to the needs of function and land saving, as well as the development and utilization of urban underground space, high-rise buildings generally have a relatively deep basement. Especially in cities located along the coastal areas of the river, the project sites are mostly distributed with deep soft soil. For this type of foundation pit, in order to save costs, the passive area of ​​the foundation pit is generally reinforced. The traditional cement-soil reinforcement structure in passive area of ​​foundation pit is grid type or wall type. Due to the low tensile strength of cement soil, this type...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D29/02E02D17/04
Inventor 余敦猛张艳军凌飞余火忠姜清华
Owner WUHAN SURVEYING GEOTECHN RES INST OF MCC
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