Deep foundation pit supporting inner support changing method

A technology for deep foundation pit support and support piles, which is applied in excavation, infrastructure engineering, water conservancy engineering and other directions to achieve the effects of small workload, high safety and stability, and low cost

Inactive Publication Date: 2019-08-30
CHINA MCC17 GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the technology in this area is not yet mature and needs to be further developed

Method used

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  • Deep foundation pit supporting inner support changing method
  • Deep foundation pit supporting inner support changing method

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Embodiment 1

[0020] Such as Figure 1-2 As shown, in the present embodiment, a deep foundation pit support internal support change method, the deep foundation pit support internal support change structure includes a support change belt and a force transmission member, the support change belt is set on the supporting pile and Between the floor slabs, the force transmission member is set in the post-cast belt of the floor slab, the force transmission member is welded with cylindrical head welding nails, and is connected to the floor steel bar. The thickness of the support belt is the same as that of the floor slab, and the force transmission member The depth of the end of the slab is not less than 500mm, the diameter of the cylindrical head welding nail is 19mm, the spacing is not more than 100mm, the force transmission member is 25a I-beam, and the following steps are adopted:

[0021] Step 1: Clean the contact parts of the supporting pile and the supporting block before the construction of th...

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Abstract

The invention discloses a deep foundation pit supporting inner support changing method and belongs to the technical field of deep foundation pit supporting. The deep foundation pit supporting inner support changing method comprises the following steps: S1, before support changing block construction, cleaning the contact part of a support pile and a support changing block; S2, adopting concrete tofill the space between a bottom plate and the support pile to form a support changing strip, and pouring grooves between every two adjacent support piles; S3, additionally arranging joist steel force-transferring components at positions, at a post-cast strip, of the bottom plate, and arranging one joist steel force-transferring component every 2.5 m; and S4, when the strength of the support changing block reaches 80% of the design strength, symmetrically detaching the support one by one. The method has the following characteristics: the workload of support changing is less, concrete is saved,and the cost is low; when the strength of the support changing block reaches 80% of the design strength, the inner support can be detached, the characteristic of shortening the construction period isrealized, and the safety and stability are high.

Description

Technical field [0001] The invention relates to the technical field of deep foundation pit support, and more specifically, to a method for changing the inner support of deep foundation pit support. Background technique [0002] In deep foundation pit projects, especially in civil construction foundation pit projects in urban centers, the scale of the basement is large, the safety factor of the foundation pit is high, and the construction period is tight. At this time, it is necessary to set up replacement support belts and force transmission members to shorten the removal and replacement period and speed up The progress of project construction, meanwhile, this approach saves costs, is safe and environmentally friendly, and has good economic and social benefits. At present, the technology in this area is not yet mature and needs further development. Summary of the invention [0003] 1. The problem to be solved [0004] In view of the problems and deficiencies in the prior art, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/04E02D29/045
CPCE02D17/04E02D29/045E02D2600/20
Inventor 汪亚伟
Owner CHINA MCC17 GRP
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