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Connecting structure and connecting method for PHC precast pile cutting pile top and bearing platform

A technology of prefabricated piles and pile tops, applied in sheet pile walls, foundation structure engineering, construction, etc., can solve the problems of restricting the development and use of PHC prefabricated piles, increasing construction risks, affecting the construction period, etc., achieving simple structure and applicability Wide, increase the effect of bending resistance

Pending Publication Date: 2021-05-28
SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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  • Abstract
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AI Technical Summary

Problems solved by technology

When the PHC prefabricated pile bears a large horizontal force, the connection between the top of the traditional cut-off pile and the cap needs to continue excavating the soil layer in the foundation pit and tying the steel bars. The construction is more complicated, which affects the construction period and increases the construction risk to a certain extent. Limit the development and use of PHC prefabricated piles

Method used

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  • Connecting structure and connecting method for PHC precast pile cutting pile top and bearing platform
  • Connecting structure and connecting method for PHC precast pile cutting pile top and bearing platform

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0015] A new type of structure for the connection between the top of the PHC prefabricated pile and the pile cap. The PHC prefabricated pile 6 forms a hollow core of the pile foundation; A gap of 200mm is reserved between the inner wall of the sleeve 1 and the side wall of the PHC prefabricated pile to form a cavity; the precast pile core and the soil in the cavity are emptied, and the steel sleeve and the side wall of the PHC pipe pile are washed clean. Use C50 back-sealing concrete 4 to seal the cavity, and at the same time set the supporting plate 8 on the pile core, lower the first reinforcement cage 2 and the second reinforcement cage 5 respectively, pour C50 concrete 3 into the cavity and the hollow core of the pile foundation, and then vibrate and compact until the pile top elevation.

[0016] The connection structure of the present invention co...

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Abstract

The invention discloses a connecting structure for a PHC precast pile cutting pile top and a bearing platform. According to the connecting structure, a pile foundation hollow core is formed in a PHC precast pile, the connecting structure is characterized in that the structure comprises a steel sleeve arranged outside the PHC precast pile in a sleeving mode, a gap is reserved between the inner wall of the steel sleeve and the outer wall of the PHC precast pile to form a cavity, the bottom of the steel sleeve is subjected to cavity bottom sealing through bottom sealing concrete, a supporting plate is arranged in the pile foundation hollow core, a reinforcement cage is placed in a cavity outside the pile foundation hollow core and the PHC precast pile, and concrete is poured to the pile top elevation. According to the connecting structure, bending moment is transmitted through the main reinforcement of the reinforcement cage, the bending resistance of a pile foundation connector is improved, the structure stress is reasonable and clear, the structure is simple, construction is convenient and rapid, the economical efficiency is good, and the PHC precast pile cutting technology is greatly improved and popularized.

Description

technical field [0001] The invention relates to the technical field of bridge structure design, in particular to a connection structure and connection method for PHC prefabricated pile cutting pile tops and caps. Background technique [0002] PHC prefabricated pile foundation engineering is low in cost and fast in construction, and it is a pile foundation form with wide applicability. When the PHC prefabricated pile bears a large horizontal force, the connection between the top of the traditional cut-off pile and the cap needs to continue excavating the soil layer in the foundation pit and tying the steel bars. The construction is more complicated, which affects the construction period and increases the construction risk to a certain extent. The development and use of PHC prefabricated piles are limited. For this reason, a new structure for the connection between the top of the PHC prefabricated pile pile and the cap has been designed and developed. It has a simple structur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D27/14E02D5/50E02D5/22
CPCE02D27/14E02D5/50E02D5/223
Inventor 尹成章戴建国周兴林李洞明朱立锋
Owner SHANGHAI MUNICIPAL ENG DESIGN INST GRP
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