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Cast-in-place pile construction method for underground engineering structure

A technology of underground engineering and construction methods, which is applied in the direction of foundation structure engineering, sheet pile walls, buildings, etc., can solve problems affecting the quality of cast-in-situ piles, affecting the smooth progress of projects, engineering accidents and risks, etc., and achieve good control of risks, Guarantee the effect of stability and great applicability

Active Publication Date: 2018-07-24
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The construction method of cast-in-place piles not only affects the smooth progress of the project, but even affects the quality of piles. Improper construction methods can easily cause engineering accidents and risks.

Method used

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  • Cast-in-place pile construction method for underground engineering structure
  • Cast-in-place pile construction method for underground engineering structure
  • Cast-in-place pile construction method for underground engineering structure

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Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments to facilitate a clear understanding of the present invention, but they do not limit the present invention.

[0024] As shown in the figure, the present invention provides a construction method for cast-in-place piles for underground engineering structures, comprising the following steps:

[0025] 1. Within the construction scope of the cast-in-place pile 8, excavate the soil 3 above the roof 4 of the existing structure on a slope; after excavation, the soil 3 above the roof 4 of the existing structure forms an hourglass-shaped pit body, and the exposed existing structure The area of ​​the top plate 4 is larger than the section of the steel casing 6, so that the steel casing 6 can enter the existing structure top plate 4;

[0026] 2. Within the construction scope of the steel casing 6, it is ensured that the steel casing 6 can pass throug...

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PUM

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Abstract

The invention provides a filling pile construction method for an underground construction structure. The method comprises the following steps that a, soil bodies on a top plate of the existing structure are excavated to expose the top plate of the existing structure; b, a first through hole is drilled in the top plate of the existing structure, and the effect that the hole diameter of the first through hole is no smaller than that of a steel casing is ensured; c, a blind hole is formed in a bottom plate of the existing structure, a second through hole and the first through hole are coaxial, the hole diameter of the second through hole is no smaller than that of the steel casing, and the effects that the second through hole does not get through, and concrete is reserved at the bottom of the hole are ensured; d, light well point precipitation is conducted on the edge of the second through hole; e, the steel casing is placed, the bottom end of the steel casting moves downwards to penetrate through the first through hole, and then gets through the second through hole, and is placed under the bottom plate of the existing structure; f, gaps on the outer wall of the steel casing are backfilled with cement paste; g, the soil bodies outside the part, above the existing structure, of the steel casing are backfilled with cement soil; and h, a filling pile is constructed in the steel casing, the steel casing is pulled out after the filling pile is completed, and plain concrete is used for sealing the holes. The problem that construction is difficult when filling piles encounter built underground structures is solved.

Description

technical field [0001] The invention belongs to the engineering fields of rail transit engineering, underground space development engineering, underground passage engineering, housing construction engineering, reconstruction and expansion, etc., and in particular relates to a construction method of cast-in-place piles for underground engineering structures. Background technique [0002] As a common structural form of foundation engineering and foundation pit enclosure, cast-in-situ piles often need to pass through existing underground structures in practical applications, such as abandoned civil air defense projects and municipal underground structures that are often encountered in the construction of foundation pit enclosure structures. The construction of structures, even the construction of engineering piles and underpinning piles in the downward reconstruction and expansion project of the existing basement, requires the construction of cast-in-place piles through the unde...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D15/04E02D5/38E02D19/10
CPCE02D5/38E02D15/04E02D19/10
Inventor 朱炎兵赵星罗会平王一博董俊张波陈辉王鹏胡正波
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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