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Double-arc-surface steel piles, underground supporting structure and construction method of underground supporting structure

A technology of supporting structure and arc surface, which is applied in basic structure engineering, excavation, sheet pile wall, etc., can solve the problems of small deformation, poor water retaining effect, prolonging construction period and construction cost, etc., so as to reduce construction cost and avoid Construction, the effect of shortening the construction period

Active Publication Date: 2018-12-07
JIANGSU DONGHENAN GEOTECHNICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] 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
[0003] 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 piles, underground supporting structure and construction method of underground supporting structure
  • Double-arc-surface steel piles, underground supporting structure and construction method of underground supporting structure
  • Double-arc-surface steel piles, underground supporting structure and construction method of underground supporting structure

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Effect test

Embodiment 1

[0026] refer to figure 1 , a double-arc steel pile 10, which includes a web 11; a pair of flanges, for the convenience of description, the pair of flanges are respectively referred to as the first flange 12 and the second flange 13, the pair of flanges Edges are provided on opposite sides of the web 11. The web 11 is a strip-shaped steel plate, and a first flange 12 and a second flange 13 are provided on both sides of the web 11 in the width direction.

[0027] The flange has an arc-shaped outer surface concaved toward the web. The outer surface 122 of the first flange 12 is concave toward the web 11 and has an arc shape. The outer surface 132 of the second flange 13 is concave toward the web 11 and has an arc shape.

[0028] In this embodiment, the central angle α of the outer surface 122 of the first flange 12 is 60°. figure 1 In the figure, for clarity, the center 121 of the outer surface 122 of the first flange 12 is represented by a small circle. The central angle β ...

Embodiment 2

[0033] This embodiment is an improvement on the basis of Embodiment 1, please refer to figure 2 The difference between the double-arc steel pile 40 in this embodiment and Embodiment 1 is that a web is added. In this embodiment, two parallel webs 41, 44 are provided, and the two webs are connected on the first On the inner surface 423 of the flange 42 and the inner surface 433 of the second flange 43, the cross-section of the double-arc steel pile 40 is axisymmetric with respect to a symmetrical axis 112, and the symmetrical axis 112 passes through the first The arc center 421 of the outer surface of one flange and the arc center 431 of the outer surface of the second flange.

[0034] The two webs 41 , 44 are roughly located in the middle region of the first flange 42 and the second flange 43 .

Embodiment 3

[0036] This embodiment is an improvement on the basis of Embodiment 1, please refer to image 3 The difference between the double-arc steel pile 50 in this embodiment and Embodiment 1 is that two webs are added. In this embodiment, three parallel webs 51, 54, 55 are provided, and the three webs are connected in On the inner surface 523 of the first flange 52 and the inner surface 533 of the second flange 53, the cross-section of the double-arc steel pile is axisymmetric with respect to a symmetrical axis 113, and the symmetrical axis 113 passes through the The center of the arc of the outer sides of the first and second flanges.

[0037] The web 51 is located in the center between the first flange 52 and the second flange 53 . The webs 54, 55 are located symmetrically on either side of the web 51 and are connected at the edges of the two flanges. The cross-section of the double-arc steel pile 50 is axisymmetric with respect to a symmetrical axis 113, and the symmetrical axis...

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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. technical background [0002] 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 bending re...

Claims

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Application Information

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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