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Construction method for pit-in-pit profile steel interior support of super high-rise building

A layered pit and super-elevation technology, applied in foundation structure engineering, sheet pile walls, excavation, etc., can solve the problems of super-high-rise pit-in-pit construction period, tight foundation pit safety and stability, etc., to solve the inconvenience of installation and recycling, and ensure The effect of closing

Inactive Publication Date: 2020-09-01
CHINA CONSTR SECOND ENG BUREAU LTD
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Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a super-high-rise pit-in-pit-shaped steel internal support construction method, which solves the problems of tight construction period and safety and stability of super-high-rise pit-in-pit

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  • Construction method for pit-in-pit profile steel interior support of super high-rise building
  • Construction method for pit-in-pit profile steel interior support of super high-rise building

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Embodiment Construction

[0024] Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0025] The invention provides a technical solution: a super-high-rise pit-in-pit-shaped steel internal support construction method, which includes the following steps:

[0026] S1. Carry out site inspection and stacking of the steel sheet piles used: for Larsen steel sheet piles, there are generally material inspections and appearance inspections, so as to correct the unqualified sheet piles and reduce difficulties in the piling process. Appearance inspection: including surface defects, length, width, thickness, height, end square ratio, straightness and lock shape; when stacking, attention should be paid to the order, position, direction and layout of the stack, etc., which should be considered in the future The construction is convenient. The sheet piles shou...

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Abstract

The invention relates to the technical field of constructional engineering and discloses a construction method for a pit-in-pit profile steel interior support of a super high-rise building. The construction method comprises steps as follows: S1, adopted steel sheet piles are subjected to receiving inspection and stacked; S2, positioning paying-off is carried out firstly, and then a guide bracket is mounted; S3, Larsen steel sheet piles are subjected to pile driving; S4, a stand column, a first support and a second support are mounted; and S5, the interior support and the steel sheet piles aredismantled to be recovered. According to the construction method for the pit-in-pit profile steel interior support of the super high-rise building, a pile driver strikes the Larsen steel sheet piles and the stand column and then steel enclosing purlin and profile steel support beams are mounted, a complete profile steel support system is formed, after early pouring maintenance of a tower raft is finished, the profile steel supports are dismantled and recovered, nodes of the pit-in-pit profile steel interior support of the super high-rise building are optimized, the nodes comprise collision nodes of the profile steel stand column and reinforcements, connecting nodes of the stand column and the support beams and connecting nodes of the enclosing purlin and the steel sheet piles, and therefore, the problem of inconvenience in subsequent mounting and recovery is effectively solved.

Description

technical field [0001] The invention relates to the technical field of construction engineering, in particular to a super-high-rise pit-in-pit steel internal support construction method. Background technique [0002] With the rapid development of super high-rise buildings, the above-ground part of the house is getting higher and higher, and the underground is getting deeper and deeper. In super-high construction, the excavation of the pit in the tower pit is an important and difficult point in the construction of deep foundation pits. The construction period is tight, the deformation of the foundation pit is large, and the groundwater is abundant. Conventional spray anchor support can no longer meet the construction period and the safety and stability of the foundation pit. In order to meet the requirements of safety, the support system adopting steel internal support solves the above problems very well. [0003] The pit in the super high-rise tower is usually 4.5-8.0m deep...

Claims

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Application Information

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IPC IPC(8): E02D17/04E02D5/04E02D5/16E02D5/76E02D7/18
CPCE02D5/04E02D5/16E02D5/765E02D7/18E02D17/04
Inventor 向长于黄海霞孔祥林
Owner CHINA CONSTR SECOND ENG BUREAU LTD
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