Construction method optimizing deep foundation pit changing supporting construction sequences

A technology of construction sequence and construction method, which is applied in basic structure engineering, excavation, construction, etc., can solve the problem of long time for strength, small space for the edge of the base plate and supporting structure, and difficulty in cleaning debris and backfilling rammed soil construction operations, etc. problems, to achieve the effect of shortening the construction period and reducing the risk of the foundation pit

Inactive Publication Date: 2013-08-21
TIANJIN SANJIAN CONSTR ENG
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Problems solved by technology

[0007] The disadvantages of the traditional method of changing the construction sequence of braces are: 1. The space between the edge of the foundation floor and the support structure is small, and it is very difficult to clean up debris and backfill the rammed soil.
2. The strength of braced concrete is often low, and it takes a long time to wait for it to reach the specified strength

Method used

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  • Construction method optimizing deep foundation pit changing supporting construction sequences
  • Construction method optimizing deep foundation pit changing supporting construction sequences

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Embodiment

[0022] see figure 1 , a construction method for optimizing the construction sequence of deep foundation pit replacement. It adopts the reverse method for sequential construction. The support structure system of the foundation pit is composed of bored grouting support piles 8 and water-stop curtains 9. Leave the original soil layer 5 below the brace structure 2, after the foundation pit grooves and the foundation brick formwork 6 are built, pour the brace structure 2 and the cushion layer 4 at the same time, and use the brace structure 2 and the foundation brick formwork 6 as the bottom plate at the same time For the outer formwork, pour the base plate 3 after the waterproof construction is completed, and the upper horizontal support structure 1 can be dismantled when the strength of the concrete of the support structure 2 and the base plate 3 reaches the strength that the horizontal support structure 1 can be removed.

[0023] In the present invention, as figure 2 As shown, ...

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Abstract

The invention relates to a construction method optimizing deep foundation pit changing supporting construction sequences. Top-down method sequence construction is adopted, and a supporting structural system of a foundation pit is formed by a drill hole potting supporting pile and a waterproof curtain. When foundation pit grooving is carried out, an original soil layer below a changing supporting structure is reserved, after the foundation pit grooving and construction of foundation brick dies are completed, the changing supporting structure and a cushion layer are poured simultaneously, the changing supporting structure and the foundation brick dies are utilized at the same time to serve as a bottom plate outer die, pouring of a foundation mat is carried out when waterproof construction is finished, and an upper part horizontal supporting structure can be dismantled when both strength of the changing supporting structure and strength of concrete of the foundation mat reach strength when the horizontal supporting structure can be dismantled. The construction method optimizing the deep foundation pit changing supporting construction sequences has the advantages of eliminating cleaning of sundries and back-fill consolidation soil operation construction, shortening a construction period, and reducing risks of the foundation pit.

Description

[0001] technical field [0002] The invention relates to a construction method for brace replacement of deep foundation pits, in particular to a construction method for optimizing the construction sequence of brace replacement for deep foundation pits, and belongs to the technical field of building construction. Background technique [0003] With the acceleration of urbanization in our country, the demand for land resources is becoming increasingly tense. In order to make full use of the land use area, buildings are developed deep underground, thus entering deep foundation pit construction. During the construction of deep foundation pits, it is necessary to speed up the construction progress of deep foundation pits and reduce the risk of foundation pits. [0004] The support replacement in foundation pit engineering is to take certain technical measures under specific conditions to gradually replace the internal support structure system that plays a role in temporary supp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/02
Inventor 陈印桥赵迎斌张永贤刘宇郑兴国臧柳阎子君张铭
Owner TIANJIN SANJIAN CONSTR ENG
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