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Double arc surface steel pile, underground support structure and construction method of underground support structure

A technology of supporting structure and construction method, which is applied in basic structure engineering, excavation, sheet pile wall, etc., can solve the problems of prolonged construction period and construction cost, small deformation, poor water retaining effect, etc., to shorten construction period and reduce Construction cost, the effect of avoiding construction

Active Publication Date: 2020-09-01
JIANGSU DONGHENAN GEOTECHNICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the support structure of the foundation pit, the cast-in-situ pile has become a commonly used support pile due to its advantages such as high rigidity, strong bending resistance, relatively small deformation, and good economic benefits. However, due to its own construction characteristics, Two adjacent cast-in-situ piles cannot be overlapped, and there should be at least 100-200mm gap between the piles, and the water-retaining effect is poor. In order to compensate for the water-retaining effect, it is generally used in combination with cement-soil mixing piles. The piles are used to resist bending, and the cement-soil mixing piles form a water-stop curtain to retain water
[0004] The combined use of cast-in-situ piles and cement-soil mixing piles ensures the water-retaining effect, but prolongs the construction period and construction cost

Method used

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  • Double arc surface steel pile, underground support structure and construction method of underground support structure
  • Double arc surface steel pile, underground support structure and construction method of underground support structure
  • Double arc surface steel pile, underground support structure and construction method of underground support structure

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Experimental program
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Embodiment 1

[0027] refer to figure 1 , a double-arc steel pile A10, which includes a web A11; a pair of flanges, for the convenience of description, the pair of flanges are respectively referred to as the first flange A12 and the second flange A13, the pair of flanges Edges are provided on opposite sides of the web A11. The web A11 is a strip-shaped steel plate, and a first flange A12 and a second flange A13 are respectively provided on both sides of the web A11 in the width direction.

[0028] The flange has an arc-shaped outer surface concaved toward the web. Wherein, the outer surface A122 of the first flange A12 is concave toward the direction of the web A11 and is arc-shaped. The outer surface B132 of the second flange A13 is concave toward the direction of the web A11 and has an arc shape.

[0029] In this embodiment, the central angle α of the outer surface A122 of the first flange A12 is 60°. figure 1 In the figure, for clarity, the arc center A121 of the outer surface A122 of...

Embodiment 2

[0034] This embodiment is an improvement on the basis of Embodiment 1, please refer to figure 2 , the difference between the double-arc steel pile B40 in this embodiment and that in Embodiment 1 is that a web is added. In this embodiment, two parallel webs are provided, which are respectively web B41 and web C44. A web is connected to the inner surface C423 of the first flange B42 and the inner surface D433 of the second flange B43. The cross-section of the double-arc steel pile B40 is axisymmetric with respect to a symmetrical axis B112. The axis of symmetry B112 passes through the arc center C421 of the outer surface of the first flange B and the arc center D431 of the outer surface of the second flange B.

[0035] The web B41 and the web C44 are located approximately in the middle region between the first flange B42 and the second flange B43.

Embodiment 3

[0037] This embodiment is an improvement on the basis of Embodiment 1, please refer to image 3 , the double-arc steel pile C50 in this embodiment is different from that in Embodiment 1 in that two webs are added. In this embodiment, three parallel webs are provided, namely, web D51, web E54 and web F55, the three webs are connected to the inner surface E523 of the first flange C52 and the inner surface F533 of the second flange C53, and the cross section of the double-arc steel pile C is symmetrical with respect to a symmetry axis C113 Symmetrical shape, the axis of symmetry C113 passes through the arc center of the outer surfaces of the first flange C and the second flange C.

[0038]The web D51 is located in the middle of the first flange C52 and the second flange C53. Web E54H and web F55 are located symmetrically on both sides of web D51 and are connected at the edges of the two flanges. The cross-section of the double-arc steel pile C50 is axisymmetric with respect to ...

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Abstract

The invention discloses double-arc-surface steel piles firstly and provides an underground supporting structure secondly. Each double-arc-surface steel pile comprises a pair of flanges arranged in a spaced mode, and a web arranged between the pair of flanges and connected to the pair of flanges. Each flange is provided with a circular-arc-shaped outer side face deviating from the corresponding web. The underground supporting structure is formed by the double-arc-surface steel piles and cast-in-place piles in an alternately arranged mode. A gap is formed between each double-arc-surface steel pile and the corresponding cast-in-place pile which are adjacent. According to the double-arc-surface steel piles and the underground supporting structure, the gap between every two adjacent cast-in-place piles can be effectively closed through the corresponding steel pile, and the water retaining requirement can be met without a water-stop curtain formed by cement soil stirring piles. The inventionfurther provides a construction method of the underground supporting structure. The construction method comprises the steps that (1) the double-arc-surface steel piles are sunken; and (2) the cast-in-place piles are constructed, and the supporting structure is formed. Through the method, the underground supporting structure with the good water retaining effect can be formed.

Description

technical field [0001] The invention relates to a support structure component, a support structure and a construction method of the support structure in the construction process of an underground structure, in particular to a double arc surface steel pile, an underground support structure and a construction method of the underground support structure. [0002] technical background [0003] In the support structure of the foundation pit, the cast-in-situ pile has become a commonly used support pile due to its advantages such as high rigidity, strong bending resistance, relatively small deformation, and good economic benefits. However, due to its own construction characteristics, Two adjacent cast-in-situ piles cannot be overlapped, and there should be at least 100-200mm gap between the piles, and the water-retaining effect is poor. In order to compensate for the water-retaining effect, it is generally used in combination with cement-soil mixing piles. The piles are used for be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D17/04E02D5/34E02D5/28E02D19/18
CPCE02D5/28E02D5/34E02D17/04E02D19/18
Inventor 李仁民王建兰刘飞
Owner JIANGSU DONGHENAN GEOTECHNICAL TECH CO LTD