Construction method of foundation pit support structure with prefabricated steel-concrete composite support

A foundation pit support and prefabricated assembly technology, which is applied in infrastructure engineering, construction, excavation, etc., can solve the problems of increasing the cost of construction waste treatment, the inability to effectively recycle steel beams, and the long time of concrete, etc., to achieve high rigidity, The effect of light weight and fast construction speed

Active Publication Date: 2021-04-27
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, steel-concrete composite beams are used as supporting members, and like reinforced concrete supporting members, it takes a long time to pour concrete on site
In addition, when the support is removed after the foundation pit support project is completed, not only will there be a lot of vibration and noise, but the demolition period will be relatively long
From the perspective of material recycling, in the composite beam support, since the steel beam and the cast-in-place reinforced concrete part are integrated by welding studs, the steel beam cannot be effectively recycled when it is dismantled, and it can only be discarded, which increases the cost of construction waste disposal

Method used

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  • Construction method of foundation pit support structure with prefabricated steel-concrete composite support
  • Construction method of foundation pit support structure with prefabricated steel-concrete composite support
  • Construction method of foundation pit support structure with prefabricated steel-concrete composite support

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Embodiment Construction

[0041] The present invention will be further elaborated below by specific examples.

[0042] A foundation pit supporting method of a prefabricated assembled steel-concrete composite support as shown in the accompanying drawing, comprising the following steps:

[0043]Step 1, referring to Fig. 10(a), a circle of steel purlins 10 is set along the surrounding wall of the foundation pit, and the front row of steel columns and the rear row of steel columns are respectively driven into the front and rear sides of the foundation pit along the vertical direction. Column 8, front steel column and rear steel column 8 respectively comprise a plurality of steel columns arranged at left and right intervals; The distance between them is 6-9m, and the distance between the two front and rear steel columns 8 corresponding to each other is 6-9m, so that the structure design is reasonable, the plane layout is reasonable, and the construction is convenient.

[0044] Step 2, welding a steel corbe...

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Abstract

The invention discloses a method for supporting a foundation pit with a prefabricated assembled steel-concrete combination support, which comprises the following steps: setting a circle of steel purlins along the enclosure wall of the foundation pit; ; Weld steel corbels on the outer wall of each steel column; fix the front and rear two steel waist beams on the upper flange of the steel column steel corbels with high-strength bolts respectively; Multiple groups of steel-concrete composite support structures are installed at intervals; a hydraulic jack is placed between the vertical plate of each angle steel and the steel purlin, and the hydraulic jack evenly loads the pressure on the prefabricated steel beams and prefabricated concrete slabs through the angle steel. The combined support of the present invention is composed of prefabricated concrete blocks and steel beams, which is convenient for installation and dismantling, fast in construction speed, reusable, can play a supporting role by applying pressure with a jack, and can adjust the size of the supporting force.

Description

technical field [0001] The invention relates to a foundation pit support structure and a construction method thereof, in particular to a prefabricated assembled steel-concrete composite support structure and a construction method thereof for foundation pit support. Background technique [0002] Foundation pit support is a temporary support, reinforcement, protection and groundwater control measure for the foundation pit to protect the construction of the main underground structure and the surrounding environment of the foundation pit. [0003] Commonly used deep foundation pit support structures include cantilever support, soil nail wall support, internal support support, anchor support, cement-soil gravity support wall, underground diaphragm wall, and combined support. The cantilever support has the disadvantages of poor water-stopping ability, long construction period, sensitivity to excavation depth, and easy to produce large deformation. Soil nail wall support has disad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D17/04
CPCE02D17/04
Inventor 罗云标王敬贺张稳军刘会州
Owner TIANJIN UNIV
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