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Construction method for in-situ water-injection pure soil compaction pile composite foundation

A construction method and composite foundation technology, applied in soil protection, infrastructure engineering, construction, etc., can solve problems such as insufficient foundation bearing capacity and limited treatment depth, reduce noise and muddy water pollution, save construction machinery, and improve work efficiency. efficiency effect

Active Publication Date: 2018-04-13
CHINA RAILWAY NO 3 GRP CO LTD +1
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to give full play to the characteristics of in-situ water-injected plain-soil compaction piles, and adopt a specific in-situ water-injected plain-soil compaction pile composite foundation construction method for the problem of insufficient foundation bearing capacity, so as to overcome the problem of limited treatment depth

Method used

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  • Construction method for in-situ water-injection pure soil compaction pile composite foundation
  • Construction method for in-situ water-injection pure soil compaction pile composite foundation
  • Construction method for in-situ water-injection pure soil compaction pile composite foundation

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Embodiment Construction

[0033] The design parameters and construction technical requirements of the plain soil compaction pile, the bladder design parameters and construction technical requirements, the manufacturing process of the connecting steel wire, etc. will not be repeated in this embodiment, and the embodiments related to the structure of the present invention will be focused on.

[0034] figure 1 It is a schematic cross-sectional view of the in-situ water injection plain soil compaction pile composite foundation of the present invention. refer to Figure 8 The shown pipe sinking pile machine for in-situ water injection plain soil compaction pile construction mainly includes immersed pipe 10, bladder 19, vertical water injection pipe 23, water injection pipe A22, annular water injection pipe 24, pile tip 15 and rear Expansion device; the pile point 15 is connected to the bottom of the immersed tube 10, and the pile point is provided with a tamping expansion plate 16. There are three annular...

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Abstract

The invention relates to a construction method for an in-situ water-injection pure soil compaction pile composite foundation. The construction method mainly comprises the steps of site clearing and flattening; surveying and setting out; construction equipment assembling in-position; hole guiding; water injection for humidifying; pipe pulling for secondary punching; falling-back soil bottom tamping; padding humidifying; hole interior layering padding, compaction tamping and hole forming; top loosened layer removing; and spreading and compaction. Through the construction method, the composite foundation can be formed, and the construction method has the advantages that construction machines are saved, the construction cost is reduced, the working efficiency is improved, noise and muddy waterpollution are reduced, residue soil is removed, and the environment is protected.

Description

technical field [0001] The invention relates to the field of foundation treatment in loess areas, in particular to a construction method of in-situ water injection plain soil compaction pile composite foundation, which is suitable for deep soft foundation treatment of highways, dams, house construction and other projects. Background technique [0002] my country has a vast territory, complex geological conditions and large differences between regions, and there are many types of loess foundations with wide distribution; especially in Northwest Gansu, there are deep loess foundations. With the further development of my country's economy, the requirements for the loess area in Northwest China will inevitably increase, which will also make the number and scale of loess projects in Northwest China continue to expand. It is an urgent problem to be solved in the field of geotechnical engineering to seek ultra-deep loess foundation treatment methods with advanced technology, reason...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/12
Inventor 王志强魏子龙洪武张云志张红福孙鹏德刘国强王存吉谢壮
Owner CHINA RAILWAY NO 3 GRP CO LTD
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