A Water-stopping Method of Horizontal Dynamic Controlled Freezing Between Pipes

Abstract

The invention discloses a horizontal dynamic controlled freezing water-stopping method between pipe curtains, the steps of which are: arranging a temperature measuring pipe in the jacking pipe; laying a controlled freezing pipeline system in the jacking pipe; connecting the controlled freezing pipeline with freezing equipment ; Perform controlled freezing operation on the soil in the pipe jacking room, and form a water-stop freezing curtain in the pipe jacking room; after there is no water-stop requirement in the pipe jacking room, the soil is thawed and processed by thawing and tracking grouting. The invention has the advantages of good water-stopping effect, little impact on the surface, safety and reliability, and easy operation, and can be realized under harsh and complicated special geological conditions such as soft soil and high-pressure water, and has strong environmental adaptability, especially suitable for complex Under geological conditions, there are buildings on the upper part or in the section with strict requirements on the surface, the water sealing construction between the pipe curtains.

Description

technical field [0001] The invention relates to the field of water sealing between pipe curtains, and more particularly relates to a horizontal dynamic controllable freezing water-stopping method between pipe curtains, which is suitable for water sealing construction between pipe curtains in the construction process of municipal pipe curtains. Background technique [0002] Since the pipe screen method was first applied to the channel project of Kawase-Inae in Japan in 1971, it has been widely used as a non-excavation technology in the construction of connecting channels such as crossing roads, railways, structures, and airports. In the construction of the pipe curtain method, the single pipes are connected on the side of the steel pipe by the lock to form a pipe row, and the water-stopping agent is injected into the gap of the lock to meet the water-stop requirement and form an advanced support. [0003] The existing water-sealing construction technology between the pipe cur...

AI Technical Summary

Problems solved by technology

This construction method cannot be used in strata with complex geological conditions and rich water content

From the perspective of water-stop effect, if the jacking deviation is too large, it will lead to cracking or deformation of the lock, or poor grouting effect will make the pipe curtain unable to form a closed space, and due to the existence of the lock, its initial The water sealing at the locking position of the well and the receiving well cannot be guaranteed, and the water sealing effect is poor, so it is difficult to apply to the formation conditions such as soft soil and high-pressure water; High requirements, difficult correction, difficult to apply to the construction of long-distance underground structures

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