Irregular foundation pit support and construction method

A foundation pit support and construction method technology, which is applied in the direction of foundation structure engineering, excavation, artificial island, etc., can solve the problems of large pressure, unclear force transmission of irregular beams, and reduced span, so as to achieve small deformation of the support structure and smooth construction Convenience and low engineering cost

Active Publication Date: 2010-03-10
ZHEJIANG JINYU ENG CONSULTING CO LTD
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Problems solved by technology

[0003] The object of the present invention is to provide a support and construction method for irregular foundation pits. By using the characteristics that the arched beams are under a large pressure and do not generate outward pushing force, the setting of the arched beams in the i

Method used

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  • Irregular foundation pit support and construction method
  • Irregular foundation pit support and construction method
  • Irregular foundation pit support and construction method

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Embodiment Construction

[0049] Project Overview

[0050] A complex building project is a large irregular deep foundation pit enclosure project, covering an area of ​​22450m 2 , consisting of a 10-story office building and a second-floor podium, with a second basement floor, with a total construction area of ​​97,000m 2 , the depth of the foundation pit is 8.6m. The shape of the foundation pit is concave in the north and nearly triangular in the south. The maximum span of the foundation pit is 45m and the minimum span is 26m. The foundation pit is surrounded by roads in the city center, and various municipal pipelines and communication optical cables are buried under it, making the environment complex.

[0051] Due to the irregularity of the plane of the foundation pit and the actual conditions of the on-site engineering construction, the use of a conventional plane-orthogonal well format support system has great limitations, and it is difficult to control the force and plane layout of the entire sy...

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Abstract

The invention discloses an irregular foundation pit support and a construction method; the irregular foundation pit support is characterized in that: an inner support adopts a way that a girt is supported on an arched beam, the arched beam is arranged in the irregular foundation pit, and a cross beam is arranged in the arched beam to enhance lateral rigidity. When the arched beam is less than 15m,four anchored piles are arranged below the arched beam; when the arched beam is more than or equal to 15m, eight anchored piles are arranged below the arched beam. And the anchored piles are uniformly distributed by surrounding the arched beam. The anchored pile and a foundation pit support pile are expansion-head bored piles, the girt is arranged on the bored piles, and the girt is connected with the arched beam by a preload stress steel pipe. Two to three rows of inner supports are adopted, when two rows of the inner supports are adopted, a first row is arranged at the top part of a soldierpile, a second row is arranged in the middle part of the soldier pile and a third row is arranged at the position of 2/3 the middle part of the soldier pile. The irregular foundation pit support hassimple structure, clear stress route, low lost of engineering construction and convenient construction; in addition, the supporting structure has small deformation, and has less effect on the surrounding buildings.

Description

technical field [0001] The invention relates to the construction field, in particular to irregular foundation pit support and construction methods. Background technique [0002] The plane shape of deep foundation pit engineering has a great influence on the stability and deformation of the foundation pit. For irregular deep foundation pit engineering, the stress situation is relatively complicated. If the foundation pit support is improper, stress concentration often occurs and the foundation pit support will be damaged. protection system. In particular, for irregular deep foundation pit projects with large spans, inconsistent spans cause uneven stress, and foundation pits are prone to accidents. Contents of the invention [0003] The object of the present invention is to provide a support and construction method for irregular foundation pits. By using the characteristics that the arched beams are under a large pressure and do not generate outward pushing force, the setti...

Claims

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Application Information

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IPC IPC(8): E02D17/04E02D17/02E02D29/045
Inventor 朱奎
Owner ZHEJIANG JINYU ENG CONSULTING CO LTD
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