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Construction method of socket water stop curtain for dual spindle soil-cement stirring mill

A technology of cement-soil mixer and cement-soil mixing pile, which is applied in the direction of foundation structure engineering, construction, sheet pile wall, etc., can solve problems such as split ends, and achieve the effects of ensuring safety, saving construction sites, and improving integrity

Inactive Publication Date: 2010-02-24
江苏华东建设基础工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problem of splitting between two columnar consolidation bodies during the construction of the water-stop curtain by the existing twin-shaft cement-soil mixer, thereby providing a double-shaft cement-soil mixer socketed with a water-stop curtain Improve the anti-seepage function of the water-stop curtain and ensure the safety of foundation pit construction and surrounding buildings

Method used

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  • Construction method of socket water stop curtain for dual spindle soil-cement stirring mill
  • Construction method of socket water stop curtain for dual spindle soil-cement stirring mill
  • Construction method of socket water stop curtain for dual spindle soil-cement stirring mill

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Embodiment 1

[0033] The basement pit of a project on Daguang Road, Nanjing City, Jiangsu Province is 7m deep, and the four sides of the pit are 170m long. The ground to 4m below the ground is plain fill, the below 4m is silt, and the groundwater level is 1.1m below the ground. In order to prevent the groundwater outside the foundation pit from flowing into the foundation pit and ensure the safety of the foundation pit construction and the buildings around the foundation pit, it is necessary to set up a water-stop curtain around the foundation pit. Since the foundation pit is located in the center of the city, the construction site is limited. At the same time, in order to save the project cost, a single row of water-stop curtain is designed on the periphery of the foundation pit. The design pile bottom depth of cement-soil mixing pile 1 is 13m, and the design pile top depth is the ground. Then, a construction method in which a two-axis cement-soil mixer is socketed with a water-stop curtai...

Embodiment 2

[0037] The basement pit of a project on Hankou Road, Nanjing City, Jiangsu Province is 9m deep, and the four sides of the pit are 200m long. The ground to 3m below the ground is silty clay, 3m to 7m below the ground is silt, 7m below the ground is sandy, and 1m below the ground is groundwater. In order to prevent the groundwater outside the foundation pit from flowing into the foundation pit and ensure the safety of the foundation pit construction and the buildings around the foundation pit, it is necessary to set up a water-stop curtain around the foundation pit. Since the foundation pit is located in the center of the city, the construction site is limited. At the same time, in order to save the project cost, a single row of water-stop curtain is designed on the periphery of the foundation pit. The depth of the pile bottom of the cement-soil mixing pile 1 is 17m, and the design depth of the pile top is the ground. Then, a construction method of a double-axis cement-soil mixe...

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Abstract

The invention relates to a construction method for muff coupling a water-seal curtain with a biaxial soil cement agitator. The construction method comprises the following steps: first step, a field isleveled; second step, a biaxial soil cement agitator is positioned; third step, the agitator is started up, agitation is performed for the first time and an agitator head is descended till the agitator head is descended to a design depth; fourth step, agitation is performed for the second time and the agitator head is ascended, simultaneously the cement mortar is sprayed, the agitator head is ascended to the top of the pile, and a first columnar induration is formed; fifth step, a mortar feeding tube and the agitator head are cleaned with clean water; sixth step, the agitator is moved forwardfor a pile position; seventh step, the third step and the fourth step are repeated to form a second columnar induration, and a soil cement agitator at the rear part of the first columnar induration is sleeved with a soil cement agitator at the front part of the second columnar induration, thereby the branching between the both columnar indurations are eliminated; eighth step, the step fifth, thestep sixth and the step seventh are continually repeated till the water-seal curtain with branching around a foundation ditch is accomplished. The construction method enhances the integrity, the continuity and the barrier property of the water-seal curtain, not only saves space, but also saves the construction cost.

Description

technical field [0001] The invention relates to a method for setting a water-stop curtain on the periphery of a foundation pit, in particular to a construction method for using a conventional double-shaft cement-soil mixer to socket the water-stop curtain. Background technique [0002] In order to ensure the smooth construction of the foundation pit and the safety of surrounding buildings, water-stop curtains are usually arranged around the foundation pit to prevent groundwater outside the foundation pit from flowing into the foundation pit. The water-stop curtain is connected by cement-soil mixing piles formed by mixing cement slurry and soil. At present, the cement-soil mixers used in the construction of cement-soil mixing piles are mostly double-shaft cement-soil mixers. The two cement-soil mixing piles formed by the construction form a columnar consolidation body. In order to prevent the water outside the foundation pit from flowing into the foundation pit, two cement-so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D19/12E02D19/18E02D5/34
Inventor 刘鑫泉刘祖春李玉成丁晓红丁金海许崇华周健华周忠民
Owner 江苏华东建设基础工程有限公司
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