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Construction method for reducing frost heave pressure during jacking pipe freezing

A technology of frost heave pressure and construction method, which is applied in infrastructure engineering, soil protection, construction, etc., can solve problems such as ground uplift, achieve the effect of safe operation platform, simple operation, and ensure construction quality and safety

Inactive Publication Date: 2018-03-06
CHINA MCC17 GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology is used in the underground excavation section of the Hong Kong-Zhuhai-Macao Bridge in my country. However, during the construction process, due to rapid freezing, the pressure on the road surface cannot be ignored, resulting in serious ground uplift, with the highest section reaching as much as 5cm.

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0012] The invention provides a technical solution: during the manufacture of frozen pipe jacking, the polymer water-absorbing material is injected into the pipe wall of the frozen pipe; When installing the freezing equipment, paint the acrylic resin evenly on the freezing equipment with a thickness of 2mm. After the equipment is connected in sequence, carry out machine debugging. After the machine is officially in operation, due to the relatively low sensitivity of the material to temperature , in a long-term freezing environment, this material begins to absorb moisture in the surrounding soil, and the surrounding soil begins to compact itself, which squeezes the jacking pipe. At this time, the pressure spreads inward, so it will not affect the jacking pipe above other structural layers.

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Abstract

The invention discloses a construction method for reducing the frost heave pressure during jacking pipe freezing. When a frozen pipeline is manufactured, a polymer absorbent material is injected intothe pipe wall of the frozen pipeline; when freezing equipment is mounted, the polymer absorbent material is evenly smeared on the freezing equipment; and during jacking pipe freezing construction, after freezing, the moisture of surrounding soil can be absorbed, so that the soil around a jacking pipe is compacted more densely.

Description

technical field [0001] The invention relates to the construction field of underground excavation technology, in particular to a construction method for reducing frost heaving pressure when pipe jacking freezes. Background technique [0002] Pipe jacking technology is generally used in horizontal construction, and the excavation section is relatively small; while freezing technology is generally suitable for vertical full-section excavation construction, and the construction platform formed by the two technologies is very firm, and there are few Potential safety hazards. Therefore, pipe jacking technology is used in the construction of some urban pipelines, pipe galleries, and comprehensive pipe networks. In some large-area vertical constructions such as mines, freezing technology is generally used. In these technologies, there is no need to consider the surrounding environment. The pressure generated by the extrusion has an impact on other structures. However, if the constr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/115
Inventor 赵海峰郭婷婷赵宏廷方贵根
Owner CHINA MCC17 GRP
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