Hollow beam supporting structure and construction method thereof

A technology of supporting structure and construction method, which is applied in the direction of basic structure engineering, underwater structures, excavation, etc., and can solve the problems of strengthening the supporting strength of hollow beams, setting prestressed tendons in open hollow beams, and not being open.

Pending Publication Date: 2020-10-27
SHANGHAI ZHIPING FOUNDATION ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, none of the above-mentioned comparative documents discloses setting prestressed tendons in hollow beams, nor does it disclose that the support strength of hollow beams is strengthened by crown beams and waist beams

Method used

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  • Hollow beam supporting structure and construction method thereof
  • Hollow beam supporting structure and construction method thereof
  • Hollow beam supporting structure and construction method thereof

Examples

Experimental program
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Embodiment 1

[0028] In this embodiment, the basement of a community is excavated, and the following construction techniques are used, see the attached figure 1 :

[0029] 1. Level the site, measure and set out the line, construct the support pile 1, the column 5 and the column pile 6, there are 8 support piles 1, and they are distributed in a rectangle, and the column 5 and the column pile 6 are arranged in the rectangle surrounded by the support pile 1 , the upright column 5 is located on the top of the upright pile 6, and there are four upright columns 5 and upright pile 6 respectively; the hollow beam 4 is prefabricated, and the shape of the hollow beam 4 needs to be prefabricated first, and the hollow beam 4 contains the main reinforcement 4-1 and the stirrup 4-2, Hollow 4-3, and hollow beam shape is square, in the present embodiment, hollow 4-3 is circular, see attached figure 2 , the cross-sectional area of ​​the hollow 4-3 accounts for 80% of the cross-sectional area of ​​the holl...

Embodiment 2

[0040] In this embodiment, the excavation construction is carried out on the submerged part of a certain subway, and the following construction technology is adopted,

[0041] 1. Construct support piles, columns and column piles along the section direction of the subway tunnel; the hollow beams are made of cast-in-place, and the cast-in-place hollow beams contain main reinforcement and stirrups. image 3 , in the present embodiment, the hollow is square, and the ratio of the cross-sectional area of ​​the hollow to the cross-sectional area of ​​the hollow beam is 70%, which fully reduces the weight of the hollow beam; The hollow inner wall is parallel and evenly distributed, and there are also multiple stirrups, and each stirrup is basically perpendicular to the main reinforcement. The main reinforcement is made of ordinary steel bars, and the stirrups are made of special steel bars.

[0042] 2. Excavate to the first support level, construct the crown beam, the crown beam adopt...

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Abstract

A hollow beam supporting structure comprises supporting piles, top beams, wrist beams and hollow beams, wherein main ribs and stirrups are disposed in the hollow beams, and each hollow beam comprisesa hollow. The hollow beam supporting structure can be prefabricated on site or in a factory, so the curing time for an ordinary reinforcement concrete support is saved; the hollow beam supporting structure can be repeatedly used, so the waste problem of a disposable material of the ordinary reinforced concrete support is solved; the hollow beam supporting structure is of a hollow structure, so thedefect of the high dead weight of the ordinary reinforced concrete support is overcome, by means of a dual-layer supporting system of the top beams and the wrist beams, supporting force of the systemis dispersed; and by arranging prestress ribs in the hollow beams, the supporting strength of the hollow beams is improved.

Description

technical field [0001] The invention relates to the technical field of building foundation pit engineering, in particular to a support structure using hollow beams and a construction method thereof. Background technique [0002] With the rapid increase of the current urban population, the excavation of underground space is developing in a deep and large direction. The commonly used support form for deep and large foundation pits is basically a plate-type vertical support system + horizontal support system; the conventional support system is reinforced concrete. Support and steel support; reinforced concrete supports are more rigid than steel supports, and are not easy to lose stability, which is beneficial to the protection of the surrounding environment. At the same time, the layout of reinforced concrete supports is flexible, which is convenient for block construction, and a large excavation space can be reserved to facilitate earthwork Excavation reduces the construction ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/04E02D29/05
CPCE02D17/04E02D29/05
Inventor 易娟胡宝山刘长伟李家红
Owner SHANGHAI ZHIPING FOUNDATION ENG CO LTD
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