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Soil cement fixed pile wall based on foundation ditch supporting and construction method thereof

A support technology for cement-soil walls and foundation pits, applied in sheet pile walls, foundation structure engineering, construction, etc., can solve the problems that cement-soil walls cannot be embedded into pebble layers, and achieve the effect of preventing overturning

Inactive Publication Date: 2008-01-09
蓝冰
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Problems solved by technology

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a cement-soil embedded pile wall and its construction method for foundation pit support that can effectively prevent piping, resist overturning damage, and eliminate potential safety hazards in foundation pit excavation. The invention is a foundation pit support construction method that adopts the method of drilling into steel pipes and grouting to form a cemented body to form an embedded pile wall instead of cement-soil wall embedding. The method of inserting steel pipes and grouting into walls solves the shortcomings that cement-soil walls cannot be embedded into pebble layers

Method used

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  • Soil cement fixed pile wall based on foundation ditch supporting and construction method thereof
  • Soil cement fixed pile wall based on foundation ditch supporting and construction method thereof

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example 1

[0020] The soil layer at the bottom of the foundation pit is silty clay, partially silt, with a thickness of 1.0-2.0m, below which is a pebble layer, the groundwater level is -3.5m, and the depth of the foundation pit is 5m, which does not meet the requirements for anti-piping and anti-overturning . Cement-soil walls are used for support and anti-seepage.

[0021] As shown in Figure 2 and Figure 3, the cement-soil wall is arranged according to the drawings, and the cement-soil wall is overlapped by cement-soil mixing piles and arranged in the form of a grid. Carry out the cement-soil mixing pile construction from the ground down, the pile diameter is 500mm, and stop when the pile is formed until the top surface 8 of the pebble layer, and the buried depth of the top surface 8 of the pebble layer is about 6-12m. According to the calculation, in the area of ​​the retaining wall where the pebble layer is buried 6-8m deep, the soil layer at the bottom of the foundation pit is basi...

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Abstract

This is a construction method for pile reinforcing wall. The wall includes a cement wall composed by grouting piles and a reinforcing wall. The reinforcing wall is made by drilling into stone layer and planting into steel pipes and grouting. The cement wall is connected with the reinforcing wall by steel pipes.

Description

【Technical field】 [0001] The invention belongs to the field of foundation engineering, and in particular relates to a cement-soil embedded pile wall for foundation pit support and a construction method thereof. 【Background technique】 [0002] At present, in the process of engineering construction, due to the high groundwater level and good stratum permeability of deep and large foundation pits, closed retaining walls are often used for retaining and anti-seepage in foundation pits, and cement-soil walls are generally used for support and anti-seepage. The embedding depth below the bottom of the foundation pit shall be determined by calculation. However, when the bottom of the foundation pit is shallower than the pebble layer, due to the limitation of the construction technology of the cement-soil mixing pile, the pebble layer cannot be embedded, which often results in insufficient embedding depth of the retaining wall, resulting in foundation pit accidents such as piping and...

Claims

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Application Information

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IPC IPC(8): E02D5/34E02D5/48E02D5/20
Inventor 蓝冰
Owner 蓝冰
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