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

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...

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, the soil layer needs to be reinforced, but the soil layer in the receiving well area When the sand is heavy, simply adopting the receiving well area reinforcement method combined with the water stop device cannot effectively prevent soil erosion, and if water and soil erosion cannot be effectively prevented, it may cause ground subsidence in the construction area, causing urban traffic and construction damage. It will cause great harm, and in severe cases, it can interrupt traffic and collapse buildings

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