Pipeline laying construction method combining non-excavation jacking and liquid nitrogen horizontal freezing excavation laying

A trenchless, combined technology, applied in pipeline laying and maintenance, mechanical equipment, pipes/pipe joints/fittings, etc., can solve problems such as ground subsidence, traffic interruption, building collapse, urban traffic building hazards, etc.

Inactive Publication Date: 2010-06-23
SHANGHAI MECHANIZED CONSTR GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to reduce the interference to the normal traffic on the ground as much as possible in the construction of underground pipelines in prosperous and hungry cities, most of them adopt the non-excavation pipe jacking construction method. It does not excavate the ground soil layer and has little impact on traffic. As long as the working wells are dug at both ends, it can be operated. It is suitable for relatively stable underground soil layers. If the soil layer is soft and has muddy water and quicksand

Method used

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  • Pipeline laying construction method combining non-excavation jacking and liquid nitrogen horizontal freezing excavation laying
  • Pipeline laying construction method combining non-excavation jacking and liquid nitrogen horizontal freezing excavation laying
  • Pipeline laying construction method combining non-excavation jacking and liquid nitrogen horizontal freezing excavation laying

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Embodiment Construction

[0008] Liquid nitrogen horizontal freezing reinforcement is carried out in the entry area 2 of the receiving well 1, and a consolidation area with a certain soil layer strength is formed in the entry area 2. When the pipe jacking machine 3 constructed by the trenchless jacking technology reaches the area near the receiving well 1, Excavate the soil body horizontally in the consolidated hole entry area 2, and excavate and lay pipe joints 4, which are combined with pipe joints jacked by trenchless jacking technology to form underground pipelines.

[0009] During implementation, when the usual reinforcement method in the receiving well area combined with the water stop device cannot effectively prevent water and soil loss in the sandy soil layer, liquid nitrogen horizontal freezing reinforcement can be used in the receiving well area, so that the incoming water can be rapidly made The hole area develops a certain strength, creating a consolidated area, thereby preventing soil eros...

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Abstract

The invention relates to a pipeline laying construction method combining non-excavation jacking and liquid nitrogen horizontal freezing excavation laying. The invention is characterized in that liquid nitrogen horizontal freezing reinforcement is carried out in a receiving well area; a solidification area with certain soil layer strength is formed in an excavation area; and when the non-excavation jacking technology construction approaches the receiving well area, horizontal soil body excavating is carried out in the solidification area to lay pipe sections which are combined with the pipe sections jacked by the non-excavation jacking technology construction, thereby forming underground pipelines.

Description

technical field [0001] The invention relates to a construction method for underground pipeline laying, in particular to a pipeline laying construction method combining non-excavation jacking and liquid nitrogen horizontal freezing excavation and laying. Background technique [0002] At present, in order to speed up the construction of the city and the beauty of the city appearance, more and more pipelines, cables, and communication lines are laid underground from the ground and overhead lines. There are two types of pipe jacking construction methods for excavation. The excavation and laying of pipe grooves requires digging the ground, which has a great impact on traffic. In order to reduce the interference to the normal traffic on the ground as much as possible in the construction of underground pipelines in prosperous and hungry cities, the non-excavation pipe jacking construction method is mostly used. It does not excavate the ground soil layer and has little impact on tra...

Claims

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Application Information

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IPC IPC(8): F16L1/028
Inventor 王国弼金中林周杜鑫朱骏王凯华
Owner SHANGHAI MECHANIZED CONSTR GRP
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