Earth pressure type spiral unearthing pipe jacking machine and spiral unearthing method

Abstract

The invention discloses an earth pressure type spiral unearthing pipe jacking machine and a spiral unearthing method. The spiral unearthing pipe jacking machine comprises a driving part and an excavating part connected with the driving part, wherein the excavating part comprises an excavating sleeve connected with the driving part and a spiral unearthing shaft arranged in the excavating sleeve; and the spiral unearthing shaft is hollow, and spiral blades are arranged on the surface of the spiral unearthing shaft. The spiral unearthing shaft is used as a water and mixed material conveying pipeline, a certain proportion of soil improvement mixed materials are injected into a soil excavating site to change the flow plasticity of soil, so that a soil mixture filled in a soil bin is kept in a balanced state with the front soil pressure of an excavation tunnel face and the pressure of underground water, the problems that stratum soil mass is excessively disturbed in the pipe jacking construction process and ground subsidence is caused after pipeline construction are solved, soil is discharged in a spiral soil discharging shaft mode, and the earth pressure type spiral unearthing pipe jacking machine is suitable for a wide range of construction soils and is suitable for construction of a clay layer, a hard soil layer, a sand soil layer, a pebble bed and a moderately-weathered rock stratum.

Description

technical field [0001] The invention belongs to the technical field of pipe jacking, in particular to an earth pressure type screw excavation pipe jacking machine and a screw excavation method. Background technique [0002] The mud-water balanced miniature pipe jacking machine currently available in the market, its basic principle is that after the main shaft of the pipe jacking machine drives the cutter head to rotate when excavating in the tunnel, the earth and rock excavated on the face of the tunnel are sent into the mud bin for secondary crushing by eccentric rotary motion. The mud-water balance pipe jacking machine for construction has a relatively large opening on the front of the cutter head, so that pebbles below 6 to 10 cm can enter the pipe jacking machine. [0003] The characteristic of the mud-water balance pipe jacking machine is that the cutter head is driven by a motor installed on the main shaft. The electric motor drives the small gear through the reducer,...

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Problems solved by technology

[0004] In the geological pipe jacking construction where the underground water system is developed, the thixotropic mud that is circulated and discharged cannot be recycled, and it is easy to escape with the groundwater and pollute the water source, causing secondary pollution

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