Airbag pile-pulling device and pile-pulling construction method

A technology of air bag and pile body, applied in sheet pile wall, foundation structure engineering, construction and other directions, can solve the problems of low pile pulling efficiency, inconvenient transportation, large structure, etc., and achieve high pile pulling efficiency, stable upward pulling, Effects with low space requirements

Pending Publication Date: 2018-12-07
NANJING GEOTECHNICAL & UNDERGROUND SPACE TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional pile extractor generally has a large structure and is inconvenient to transport, especially for the high requirements on the construction site and space. When the operating space of pile extraction is limited, the efficiency of pile extraction is low, and the phenomenon of pile breakage often occurs

Method used

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  • Airbag pile-pulling device and pile-pulling construction method
  • Airbag pile-pulling device and pile-pulling construction method
  • Airbag pile-pulling device and pile-pulling construction method

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Embodiment Construction

[0039] In order to make the purpose and technical solutions of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention. Apparently, the described embodiments are some, not all, embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] Such as figure 1 Shown: The structure of the bottom steel plate: prefabricated four fan-shaped steel plates, which can be spliced ​​into a circle, and the overlapping parts of the steel plates are connected by bolts, and the spliced ​​circular steel plates are used as a reaction support platform. And the center of the circular steel plate reserves a hol...

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Abstract

The invention relates to the field of geotechnical engineering, in particular to an airbag pile-pulling device and a pile-pulling construction method. A through hole is formed in the center of a reaction support platform of the airbag pile-pulling device; a pile body penetrates through the center hole of the reaction support platform; and the upper end surface of the reaction support platform is provided with L-shaped steel plates, and a peripheral steel plate is arranged on each L-shaped steel plate. Top-layer steel plates are arranged between the L-shaped steel plates. A through hole is formed in the center of each top-layer steel plate, and the pile body penetrates through the through holes. An airbag is arranged between the reaction support platform and the top-layer steel plates. Pilebody holders are arranged on the top-layer steel plates to hold the pile body. According to the airbag pile-pulling device and the pile-pulling construction method, the pile-pulling device adopts a splicing method and is flexible and convenient, and has low requirements for the construction space. High-pressure gas cylinders, air pumps and the like can be selected as loading gas sources, and thepressure and loading rate of the airbag can be precisely controlled by a pressure regulating valve device to ensure uniform pressure transmission of the airbag and ensure smooth lifting of the pile body.

Description

technical field [0001] The invention relates to the field of geotechnical engineering, in particular to an airbag pile pulling device and a pile pulling construction method. Background technique [0002] Nowadays, urban construction is developing vigorously, the development of above-ground buildings has become saturated, and the construction of underground spaces is also in full swing. However, the development and construction of underground space is often limited by the pile foundation of existing buildings (structures). For example, when the subway passes through the urban underground, it is inevitable to encounter pile foundation projects left by abandoned buildings (structures) on the ground. These pile foundation works have become a major obstacle for the subway shield tunneling construction, especially its internal steel structure, which is catastrophic for the shield tunnel, which may cause damage to the shield machine cutter head and work failure of the screw convey...

Claims

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Application Information

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IPC IPC(8): E02D9/02
CPCE02D9/02
Inventor 王志华高洪梅张举华陈炜昀孙晋晶李方明夏云刚
Owner NANJING GEOTECHNICAL & UNDERGROUND SPACE TECH CO LTD
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