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Subway station deep foundation pit part reverse construction structure and method

A technology for subway stations and construction methods, applied in infrastructure engineering, underwater structures, excavation, etc., can solve problems such as large investment, difficult construction, and difficult planting reinforcement, and achieve high structural safety and engineering reliability High effect of high engineering safety

Inactive Publication Date: 2018-12-14
CHINA RAILWAY 12TH BUREAU GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to overcome the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a partial reverse construction method for the deep foundation pit of a subway station. Difficulty, large investment, poor accuracy of pre-embedded sleeves, difficulty in planting bars, and difficult implementation of outsourcing waterproofing

Method used

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  • Subway station deep foundation pit part reverse construction structure and method
  • Subway station deep foundation pit part reverse construction structure and method

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Experimental program
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Embodiment

[0050] 1) Envelope structure 6, central column 7: first-order construction:

[0051] ① The processing of the reinforcement cage of the enclosure structure 6 should pay attention to the setting of the positioning block of the pre-embedded hanging bar 1;

[0052] ② The distance between the main bars of the enclosure structure 6 should fully consider the installation of the pre-embedded hanging bars 1;

[0053] The pile position deviation, axis and vertical axis direction of the central column 7 should not be greater than 50mm, and the verticality deviation of the pile body should not be greater than 1%.

[0054] 2) Pre-embedded hanging bar 1: pre-embedded hanging bar 1 in the reinforcement cage of enclosure structure 6, one-step construction:

[0055] ① The pre-embedded hanging rib 1 can be positioned through the positioning block of the enclosure structure 6;

[0056]② The pre-embedded hanging bars 1 can calculate the specifications and spacing of the hanging bars 3 accordi...

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Abstract

The invention discloses a subway station deep foundation pit part reverse construction structure and method. The subway station deep foundation pit part reverse construction structure comprises retaining structures, the retaining structures are connected through plate ring beam structures, stand columns are supported below the plate ring beam structures, hanging steel bars are pre-buried on the retaining structures to be connected with hanging steel bars on the plate ring beam structures through stretching screws, reserved along-building side wall steel bar connecting sleeves are arranged on the plate ring beam structures, and a structural side wall is arranged on one side of the retaining structures. The subway station deep foundation pit part reverse construction structure has the advantages of convenient construction, safety and reliability, and economical and practical properties, and the safety risks and economic losses caused by unreasonable and uncertain factors such as damage to the retaining structures, damage to the integrity of outer-wrapping flexible waterproof and inaccurate positioning of embedded sleeves are avoided.

Description

technical field [0001] The invention belongs to the technical field of deep foundation pit construction, and in particular relates to a construction structure and a construction method for partial inversion of deep foundation pits in subway stations. Background technique [0002] The principle of the partial reverse method technology is to construct the beam-slab structure layer by layer from top to bottom for the underground structure of the proposed structure, and then construct the side wall structure from bottom to top. That is, continuous walls or close-packed piles are constructed around the basement of the building as the enclosure structure of the basement pit, and at the same time, intermediate support piles are constructed at relevant positions inside the building to form an inverted vertical load-bearing system. A layer of earthwork is excavated, and a layer of soil mold is poured to construct a basement beam-slab structure. The beam-slab structure and the enclosu...

Claims

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Application Information

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IPC IPC(8): E02D17/02E02D17/04E02D29/045
CPCE02D17/02E02D17/04E02D29/04
Inventor 沈海瑞任正云龙辉张瑞哲
Owner CHINA RAILWAY 12TH BUREAU GRP
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