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Enhanced prefabricated T-shaped sheet pile supporting structure and construction method thereof

A technology of support structure and construction method, which is applied in the direction of foundation structure engineering, sheet pile wall, excavation, etc., which can solve the problem of difficult connection between support steel bars and support piles, insufficient performance of cross-sectional moment of inertia, and difficulty in ensuring drainage effect and other problems, to achieve the effect of reducing the amount of concrete, speeding up the subsequent construction speed, and reducing the construction process

Inactive Publication Date: 2019-06-21
SOUTHWESTERN ARCHITECTURAL DESIGN INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The current foundation pit support structure itself deforms greatly during the support process. The support piles commonly used today are designed according to circular cross-sections. The steel bars play the main bearing role in the tension area, and the concrete in the pile body fails after being stretched and cracked. , and the main stress bars can only be arranged along the periphery of the round pile, so that the stress of the steel bars in each part is not synchronized
In addition, the compression zone of circular cross-section support piles is small, and the performance of the cross-sectional moment of inertia to exert the cross-sectional shape is not sufficient, and the deformation control requirements can only be met by increasing the cross-section; if the pile spacing is too large, the soil between the piles If the support is not excavated in time, it will easily collapse; the soil support reinforcement between the piles and the support piles are not easily connected firmly, and collapse is easy to occur; the construction of the drainage holes between the piles is cumbersome, and the drainage effect is not easy to guarantee

Method used

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  • Enhanced prefabricated T-shaped sheet pile supporting structure and construction method thereof
  • Enhanced prefabricated T-shaped sheet pile supporting structure and construction method thereof
  • Enhanced prefabricated T-shaped sheet pile supporting structure and construction method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] see figure 1 and figure 2 , a reinforced prefabricated T-shaped sheet pile 1 support structure, including a T-shaped sheet pile 1 embedded in the side wall of the foundation pit and supporting the soil on the side wall of the foundation pit, and the T-shaped sheet pile 1 includes and The T-shaped plate longitudinal wing 2 parallel to the side wall of the foundation pit and the T-shaped plate transverse wing 3 perpendicular to the foundation pit side wall, the T-shaped plate longitudinal wing 2 is located at the soil edge of the foundation pit side wall, and the T-shaped plate transverse wing The plate 3 is located in the soil body of the side wall of the foundation pit; the longitudinal wing plate 2 of the T-shaped plate is provided with a horizontally arranged anchor hole 5, and the anchor hole 5 is provided with an anchor 6 passing through the anchor hole 5, and the anchor 6 and the T-shaped plate The longitudinal wing 2 is stressed synchronously, which improves the...

Embodiment 2

[0027] see figure 1 and figure 2 , a construction method of a reinforced prefabricated T-shaped sheet pile 1 support structure, comprising the following steps:

[0028] 1) Calculate and determine the length, diameter, pile spacing and deformation of circular cross-section support piles according to the soil layer distribution of the foundation pit site, the physical and mechanical performance parameters of the soil, and the design size of the foundation pit;

[0029] 2) According to the principle of equal moment of inertia, the circular section moment of inertia of the circular section support pile is converted into the T-shaped section moment of inertia of the T-shaped sheet pile 1, and the size of the T-shaped sheet pile 1 is determined, and determined according to the principle of equal deformation Pile spacing and pile length of T-shaped piles;

[0030] 3) Make the T-shaped sheet pile 1 according to the size of the T-shaped sheet pile 11 determined in 2), and maintain i...

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Abstract

The invention relates to the field of foundation pit supporting structures and construction and discloses a reinforced prefabricated T-shaped sheet pile supporting structure, including a T-shaped sheet pile fixedly embedded in the side wall of a foundation pit and playing a role in supporting soil on the side wall of the foundation pit, the T-shaped sheet pile comprises a T-shaped sheet longitudinal flange parallel to the side wall of the foundation pit and a T-shaped sheet transverse flange perpendicular to the side wall of the foundation pit, the T-shaped sheet longitudinal flange is locatedon the edge of the soil on the side wall of the foundation pit. The invention further discloses a construction method of the reinforced prefabricated T-shaped sheet pile supporting structure. The reinforced prefabricated T-shaped sheet pile supporting structure gives full play to the inertia moment performance of the cross section of the component, reduces the concrete consumption of a tension area, is rapid and simple in construction, can reduce the number of support piles, reduces the risk of soil collapse between the piles, can reduce a certain amount of soil body lateral pressure, and effectively accelerates the construction progress; and synchronous stress pre-stressed pre-stressed anchor cables can be constructed through preformed holes, so that deformation is effectively reduced, the overall stability of the supporting structure is enhanced, and the deformation resistance of the supporting piles is effectively enhanced.

Description

technical field [0001] The invention relates to the field of foundation pit support structure and construction, in particular to a reinforced prefabricated T-shaped sheet pile support structure and a construction method thereof. Background technique [0002] The current foundation pit support structure deforms a lot during the support process. The support piles commonly used today are designed according to the circular cross-section, and the steel bars play the main bearing role in the tension area, and the concrete of the pile body fails after being stretched and cracked. , and the main stress tendons can only be arranged along the periphery of the round pile, so that the stress of the reinforcement in each part is not synchronized. In addition, the compression zone of circular cross-section support piles is small, and the cross-sectional moment of inertia can not fully exert the performance of the cross-sectional shape, so the deformation control requirements can only be m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/10E02D17/04
Inventor 康景文胡熠纪智超陈继彬钟静杨军金星贾登圣傅宇何祥清张宇唐静陈适
Owner SOUTHWESTERN ARCHITECTURAL DESIGN INST