Freezing type pipe shed and construction method thereof

Abstract

The invention discloses a freezing type pipe shed and a construction method thereof. The construction method comprises the following steps that an orifice pipe is horizontally embedded into an underground diaphragm wall and is installed and fixed; a drill bit is used for continuously drilling and opening a hole so as to get through the underground diaphragm wall; a pipe shed body is placed in theorifice pipe, and the pipe shed body penetrates through the underground diaphragm wall and extends into the stratum; a freezing pipe is placed in the pipe shed body; an end head closing plate is installed at the tail end opening of the pipe shed body, a hole is formed in the tail end opening of the pipe shed body, a filling grouting pipe is placed in a gap between the pipe shed body and the freezing pipe through the hole, and filling grouting is carried out so as to form a cement mortar layer; and an end head cover plate is arranged at the tail end of the freezing pipe, a liquid supply pipe and a liquid return pipe penetrate through the end head cover plate and are placed in the freezing pipe, low-temperature saline water circulation is carried out in the freezing pipe through the liquid supply pipe and the liquid return pipe so as to freeze soil around the pipe shed body, and a reinforcing body combining the pipe shed body and frozen soil is formed. The freezing type pipe shed and theconstruction method thereof have the advantages that the respective advantages of the two reinforcing modes of the pipe shed body and the freezing pipe are fully exerted; the freezing type pipe shedand the construction method thereof are suitable for dealing with complex working conditions; and the safety is good.

Description

technical field [0001] The invention belongs to the technical field of underground support structures, and in particular relates to a frozen pipe shed and a construction method thereof. Background technique [0002] Pipe shed and freezing are common ground reinforcement and support methods, which have been widely used in underground engineering. The pipe shed is flexible in construction and has a strong bearing capacity, but it is not sealed between two adjacent pipes. When there is groundwater influence, it faces the risk of water and soil loss in the formation or water and sand gushing; the freezing method adopts artificial refrigeration technology to form soft soil Frozen soil with a certain bearing capacity has low strength, and there are problems of frost heaving and thawing settlement. Therefore, when the surrounding environment is complex and needs to bear a large load, the adaptability of the freezing method is poor. Contents of the invention [0003] The object o...

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Problems solved by technology

The construction of the pipe shed is flexible and has a strong bearing capacity, but there is no seal between two adjacent pipes. When there is groundwater influence, it faces the risk of soil erosion or water gushing sand in the formation; the freezing method adopts artificial refrigeration technology to form soft soil Frozen soil with a certain bearing capacity has low strength, and there are problems of frost heaving and thawing. Therefore, when the surrounding environment is complex and needs to bear a large load, the adaptability of the freezing method is poor

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