Pipe jacking machine holing-through construction method of rectangular channel construction in deep soil layer

Abstract

The invention relates to a pipe jacking machine holing-through construction method of a rectangular channel construction in a deep soil layer. The construction method is characterized in that: after fender posts of a launching shaft at the outer side of a space enclosing structure of a station is finished, a holing-through part of a rectangular pipe jacking pipe is reinforced before the excavation and two rows of phi three-shaft agitating piles are used for constructing; the pipe jacking machine holing-through construction method comprises the following steps of: positioning and sloping a counter-force frame and a launching frame on the launching shaft according to an actual axis; after the rectangular pipe jacking pipe is spliced in the shaft in place, starting to install a water stopping device; after carrying out secondary chiseling on tunnel portal concrete and installing a front approach bridge in a hole circle, adopting a small oil cylinder to synchronously jack a machine into the hole circle; after the installation, jacking the device by the rectangular pipe jacking pipe and stopping the machine until a cutter point touches a triple high-pressure jet grouting pile to be reinforced; and filling a large cutter head region by fly ash slurry and pulling out H-type steel in the three-shaft agitating pile at the inner row. The pipe jacking machine holing-through construction method of the rectangular channel construction in the deep soil layer, provided by the invention, has the advantages that the independence and the waterproof performance of soil bodies meet the holing-through requirements, the area of the reinforce region is reduced and the pipeline safety is protected.

Description

technical field [0001] The invention relates to a tunnel-entry construction method for a pipe-jacking machine in the construction of a rectangular channel in a deep-covered soil layer. Background technique [0002] At present, with the advancement of social urbanization and the rapid development of municipal engineering construction, more and more attention has been paid to the development and utilization of underground space. In particular, the emergence of the rectangular pipe jacking technology field ensures the construction of underground tunnels under the conditions of no ground excavation, pipeline relocation, and traffic closure. Compared with circular pipe jacking machines, it can improve the utilization rate of underground space. However, due to the complex underground environment encountered in underground construction, such as completed buildings, groundwater, quicksand, etc., a little carelessness will bring major dangers, resulting in damage to completed buildin...

AI Technical Summary

Problems solved by technology

However, due to the complex underground environment encountered in underground construction, such as completed buildings, groundwater, quicksand, etc., a little carelessness will bring major dangers, resulting in damage to completed buildings or the collapse of the construction site.

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