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Foundation pit construction method

A construction method and foundation pit technology, applied in the direction of foundation structure engineering, excavation, sheet pile wall, etc., can solve the problems of site and long construction period, large equipment, surrounding environmental pollution, etc., achieve simple construction, reduce construction land, occupy small area effect

Inactive Publication Date: 2010-08-04
JIANGSU SHUNDA ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods require large equipment and sites during construction, and the construction period is long, causing great pollution to the surrounding environment.

Method used

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Embodiment 1

[0027] This embodiment is the foundation pit of an underground circular three-dimensional garage, using steel sheet piles as the supporting structure, the outer diameter of the foundation pit is 2143cm, and the net inner diameter is 2059cm. 4 ring-shaped internal supports are arranged on the inside of the steel sheet piles in the foundation pit, and the outer edge of the ring-shaped internal supports touches the steel sheet piles to support the steel sheet piles. After excavating 17m in the foundation pit, pour 3.5m of bottom-sealing concrete, and then pour 1m thick reinforced concrete floor.

[0028] The specific implementation steps of the above-mentioned underground circular three-dimensional garage foundation pit are as follows:

[0029] A. Measure the inner diameter of the center line of the steel sheet pile required for stakeout;

[0030] B. Insert and drive positioning piles inside the center line of the steel sheet pile, and install the above-mentioned steel sheet pil...

Embodiment 2

[0039] This embodiment is the same construction process for the foundation pit of the underground three-dimensional garage as in Embodiment 1, the only difference is that the soil layer is almost impermeable or poorly permeable. Therefore, all other construction steps are the same, only steps E-H are different, and the specific differences are as follows: Excavate the soil layer of the cofferdam to the place where groundwater seeps, and use a small pump to drain water outward, as long as the foundation in the cofferdam is not There is standing water. This construction method is relatively simple, as long as the internal support is added while pumping water; then other work such as back sealing can be performed according to conventional ground operations.

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Abstract

The invention mainly discloses a foundation pit construction method. In the method, steel sheet piles are used as the supporting structures along the inner diameter of the foundation pit, the earth is excavated downwards and then the inner supports in the steel sheet piles are kept not deformed by support until the bottom of the foundation pit is sealed. The foundation pit construction method has the following advantages: the steel sheet piles have lighter weight, are simple and convenient to construct and dispense with huge construction equipment; the foundation pit has small floor area and can reduce the construction land to the greatest extent during shortage of construction sites or construction in cities; pollution to the surrounding environment can not be produced and the method has environment-friendly characteristic; construction is fast, the construction efficiency is high and the construction period can be greatly shortened; the steel sheet piles have good interchangeability and watertightness; the method can ensure the whole maintenance structure to be more economic and reasonable while meeting the requirements of different geology, depth and supporting structures by changing the section shapes and the length of the steel sheet piles.

Description

technical field [0001] The invention relates to a foundation pit construction method, in particular to a method for quickly and effectively constructing a foundation pit by using steel sheet piles as a supporting structure. Background technique [0002] Common support structures for foundation pit construction include: pile-row support structures with bored piles or reinforced concrete slabs as the main body, underground diaphragm walls, cement-soil walls, soil nail walls, deep-mixed cement-soil enclosure walls, high-pressure Rotary grouting pile, SMW construction method, etc. These methods all require larger equipment and sites during construction, and the construction period is long, which causes relatively large pollution to the surrounding environment. Contents of the invention [0003] The main task of the present invention is to provide a foundation pit construction method, in particular to a foundation pit construction method with high construction efficiency and a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/04E02D17/02
Inventor 夏建华肖佳鹏陈学栋刘亮亮
Owner JIANGSU SHUNDA ENG TECH
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