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Construction method for retaining and protecting foundation pit of building with basemen

A foundation pit support and construction method technology, which is applied in construction, foundation structure engineering, excavation, etc., can solve the problems that the construction of the side wall of the basement cannot be carried out smoothly, and achieve the effects of reducing the calculation height, reducing the cross section, and shortening the calculation height

Inactive Publication Date: 2011-02-02
浙江九恒建筑安全技术股份有限公司
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Problems solved by technology

[0003] The invention solves the problem that the construction of the side wall of the basement cannot be carried out smoothly when the inner support is set in the middle during the support construction of the foundation pit

Method used

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  • Construction method for retaining and protecting foundation pit of building with basemen

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Embodiment Construction

[0029] A construction area of ​​a project is 25398M 2 , a twelve-story frame-shear structure with a second-story basement. The depth of the foundation pit is 8m, and the geology within the scope of the site is miscellaneous fill, silt and clay in sequence. The thickness of miscellaneous fill is 0.8m, the thickness of silt is 11.6m, and the thickness of clay is 16m. Bored piles with reinforced concrete inner support are used. Combined with cement mixing pile water stop wall for support.

[0030] According to the characteristics of the foundation pit, it can be considered to set up internal supports in the middle of the foundation pit. During the construction process, certain technical measures are adopted to gradually replace the internal support structure system of temporary support, so as to ensure the safe and orderly adjustment, transfer and redistribution of stress. Therefore, after the temporary internal support is removed, the project can continue with safety and qualit...

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Abstract

The invention discloses a construction method for retaining and protecting a foundation pit of a building with a basement, which is characterized in that: the top of a retaining and protecting pile is provided with an inner supporter for the foundation pit of a two-floor basement; a position above a bottom board of a first-floor basement 50cm is provided with a second inner supporter; a bottom board and side walls of a second-floor basement are poured first when a foundation is excavated to a designed elevation; and then the bottom board of the first-floor basement is poured. Bottom boards ofthe second-floor basement and the first-floor basement and the side walls of the basement form a box-shaped structure; gaps among the side walls of the basement and the retaining and protecting pile are filled; the second inner supporter is removed by using static blasting; the side walls of the basement are sequentially constructed; and the gaps among the side walls of the basement and the retaining and protecting pile are filled back, and then the first inner supporter is removed. The construction method has the advantages of high safety and good economic benefit.

Description

technical field [0001] The invention relates to a foundation pit support construction method for a building with a basement, which is suitable for the field of building construction. Background technique [0002] The traditional foundation pit support method is to set an internal support on the top, which is obviously uneconomical and unsafe for foundation pits with two-story basements or three-story or more basements. However, if the internal support is set in the middle of the foundation pit, the side walls of the basement cannot be poured in one go. Since the setting of the internal support involves the force mode of the foundation pit, the internal support cannot be removed at will during the construction process, so setting the internal support in the middle of the foundation pit has brought great difficulties. Contents of the invention [0003] The invention solves the problem that the construction of the side wall of the basement cannot be carried out smoothly when...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D17/04
Inventor 朱奎
Owner 浙江九恒建筑安全技术股份有限公司
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