Construction method for opening hole between rectangular pipe jacking channels

Abstract

The invention discloses a rectangular pipe jacking construction technology, and particularly discloses a construction method for opening a hole between rectangular pipe jacking channels. The construction method comprises the following steps: construction preparation, freezing hole construction, freezing station mounting, active freezing and maintenance freezing, excavating and building construction, freezing hole plugging, and thaw settlement grouting. Through the arrangement of a freezing hole, and arrangement of preventive measures in the construction process of the freezing hole, the construction safety and the construction effect are ensured; for contact channel excavating and building construction, earth excavation is carried out in a layering and blocking removal way, so that the structural stability after contact channel construction is ensured and damage to a surrounding structure is small; after completion of the contact channel construction, the thaw settlement grouting is performed through grouting holes preserved in the two sides of the hole opened between the pipe jacking channels, and preserved in a top plate and a bottom plate, so that ground settlement and structural deformation are controlled; by the construction method, the construction problem of the hole between the rectangular pipe jacking channels is solved, the construction process is safe, the opened channel structure is stable and reliable, and the construction efficiency is high.

Description

technical field [0001] The invention relates to a construction technology for pipe jacking passages, in particular to a construction method for opening holes between rectangular pipe jacking passages. Background technique [0002] Pipe jacking construction is a non-excavation construction method, which refers to a pipeline burial construction technology that does not excavate or excavates less. The pipe jacking method is to use the jacking force generated by the jacking equipment in the working pit to overcome the friction between the pipeline and the surrounding soil, push the pipeline into the soil according to the designed slope, and transport the earth away. After one section of pipeline has been jacked into the soil layer, the second section of pipeline will continue to be jacked. Its principle is to push the tool pipe or roadheader from the working pit through the soil layer to the receiving pit by means of the thrust of the main top oil cylinder, the pipeline room, a...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the fact that the ground where the urban underground pipe jacking passage is located is mainly a silt layer, the formation is rich in water, has good water permeability, and is a sandy formation that is severely liquefied, making the construction of the interconnection between the pipe jacking passages extremely difficult. In order to solve the problem that the functions of driving and pedestrians cannot be better, a construction method of opening holes between rectangular pipe jacking channels is provided to solve the gap between rectangular pipe jacking channels in silt layers with rich water content and good water permeability. Opening construction, the construction process of this method is safe, the structure of the opened channel is stable and reliable, and the construction efficiency is high

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