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Foundation pit support structure and construction method thereof

A foundation pit support and construction method technology, which is applied in the direction of foundation structure engineering, excavation, sheet pile walls, etc., can solve the problems that affect the construction progress and cost, complex construction technology, non-recyclable, etc., and achieve good promotion value and construction The effect of simple process and convenient processing and production

Active Publication Date: 2020-09-01
SHANGHAI CONSTRUCTION GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that the traditional foundation pit support structure system not only has complicated construction technology, takes up a large space, but also cannot be recycled, which affects the construction progress and cost, the purpose of the present invention is to provide a foundation pit with good water-stop effect and high construction efficiency. Pit supporting structure and its construction method

Method used

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  • Foundation pit support structure and construction method thereof
  • Foundation pit support structure and construction method thereof
  • Foundation pit support structure and construction method thereof

Examples

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Effect test

Embodiment 1

[0041] Combine below Figure 1 to Figure 10 The structural composition of the foundation pit supporting structure of the present invention is described.

[0042] Please refer to Figure 1 to Figure 10 , a foundation pit support structure, comprising foundation pit surrounding protection piles and at least one water stop structure arranged between adjacent foundation pit protection piles, the water stop structure includes a steel plate 10, a flexible rubber water stop plate 20 and a pile head 30. There is a bending part at the top of the steel plate 10; the flexible rubber water-stop plate 20 includes a vertical plate 21 and female locks 22 provided on both sides of the flexible rubber water-stop plate. The top of the vertical plate 21 of the flexible rubber water-stop plate is embedded in the steel plate 10 Inside the bend at the top. The pile head 30 includes a triangular pyramid structure 31 with an open upper end and connecting parts 32 arranged symmetrically at both ends...

Embodiment 2

[0053] Please continue to refer Figure 1 to Figure 10 , the present invention takes bored pile 41 as an example to illustrate the construction method of this foundation pit support structure, and this construction method comprises the steps:

[0054] Step S1: positioning the retaining pile around the foundation pit and using a pile driver to complete the hole-forming construction of the bored pile 41;

[0055] Step S2: Bind the reinforcement cage, weld the C-shaped male lock 24 on the reinforcement cage, and complete the construction of the bored pile 41, and the C-shaped male lock 24 is provided with a long PC pipe with a closed bottom;

[0056] Step S3: Provide a water-stop structure, the water-stop structure includes a steel plate 10, a flexible rubber water-stop plate 20 and a pile head 30, the top of the steel plate 10 is provided with a bending portion, the flexible rubber water-stop plate 20 includes a vertical plate 21 and a The O-shaped female lock 22 provided on th...

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Abstract

The invention discloses a foundation pit support structure and a construction method thereof, relates to the technical field of geotechnical engineering foundation pit support, and provides the foundation pit support structure with good water stop effect. The foundation pit support structure comprises foundation pit fender posts and at least one water stop structure arranged between the foundationpit fender posts, wherein the water stop structure comprises a steel plate, a flexible rubber water stop plate and a pile head; the flexible rubber water stop plate comprises a vertical plate and negative lock catches positioned at the two sides of the vertical plate; the top end of the steel plate is provided with a bending part; the pile head comprises a triangular cone structure, and a steel plate limiting slot is formed above the triangular cone structure; the two ends of the pile head are provided with connecting parts which are matched with the negative lock catches; the lower end of the steel plate is inserted into a steel plate limiting slot; the upper end of the vertical plate is embedded into the bending part of the steel plate; the lower end of the vertical plate is fixedly connected to the triangular cone structure; the negative lock catches of the flexible rubber water stop plate are sleeved by the connecting part of the pile head; and the negative lock catches of the flexible rubber water stop plate are in matched connection to positive lock catches of the fender posts. The water stop curtain does not need to additionally arrange for foundation pit engineering with water interception requirements, so that the manufacturing cost is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering foundation pit support, in particular to a foundation pit support structure and a construction method thereof. Background technique [0002] In recent years, with the acceleration of urbanization and the increasing development and utilization of underground space, the depth of foundation pits has become deeper and deeper, and the requirements for supporting structures have become higher and higher. In order to ensure the safety of the pit excavation process, it must also have a certain degree of economy. [0003] At present, the commonly used deep foundation pit enclosure structure systems include steel sheet piles, biaxial mixing piles, triaxial mixing piles, bored cast-in-place piles, and underground diaphragm walls, etc. Among them, the discrete bored cast-in-place piles need to be equipped with a water-stop curtain to ensure Water-stop effect during deep foundation pit excava...

Claims

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Application Information

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IPC IPC(8): E02D17/04E02D19/18E02D5/34E02D5/28E02D5/72
CPCE02D5/28E02D5/34E02D5/72E02D17/04E02D19/18
Inventor 颜超周婉孙廉威张竹庭史苏清
Owner SHANGHAI CONSTRUCTION GROUP
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