Pipe jacking construction method in complex terrain environment

Abstract

The invention discloses a pipe jacking construction method in a complex terrain environment. A panel type 3.5m large cutter head earth pressure balance pipe jacking heading machine is adopted; cut soil enters a muddy water cabin from gaps of a main cutting edge; soil in the muddy water cabin is broken into mud under the joint action of a stirring bar behind a cutter head and muddy water; and the water and earth pressure of excavation surfaces is balanced by controlling the mud and water pressure and the mud weight of the muddy water cabin, so that the excavation surfaces are always in a stablestate. As for sections with poor soil quality and a large buried depth of pipelines, or sections located in a prosperous region with buildings (structures) or traffic trunks above and strict restrictions on displacement and groundwater by surrounding environments, the large-diameter earth pressure balance pipe jacking method is easy and safety in construction, high in quality, low in investment and short in construction period, extrusion of surrounding pipelines and settlement of the ground are effectively controlled, and smooth operation of ground transportation is ensured while important underground pipelines are protected during construction.

Description

technical field [0001] The invention relates to a construction method for pipe jacking in a complex site environment, belongs to the technical field of construction engineering, and is suitable for the construction of underground excavation pipeline projects in muddy or cohesive soil layers with pipe diameters ranging from 2700mm to 3500mm and buried depths exceeding 9m. Background technique [0002] In the complex environment of the urban core area, the traditional large-scale excavation method can no longer meet the requirements of civilized construction and safety technology, and pipe jacking construction is an underground pipeline construction method that does not need to excavate the surface layer and can pass through Roads, railways, ground buildings and various pipelines. [0003] The main feature of pipe jacking construction is that the single jacking length of the pipe jacking is up to 274 meters, and the single jacking length is long, including concrete straight li...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a construction method for pipe jacking in a complex location environment to overcome the shortcomings of existing pipe jacking construction methods in a complex location environment

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