Mud water balance shield tunnelling machine and pipe jacking tunnelling construction method by applying mud water balance shield tunnelling machine

Abstract

The invention discloses a mud water balance shield tunnelling machine. The mud water balance shield tunnelling machine comprises a rotatable cutter disc and a cutting mechanism, wherein the cutter disc is provided with a conical surface with the cross section decreasing gradually and a propulsion surface, and the propulsion surface is provided with a material inlet; and the cutting mechanism comprises a first cutting component and a second cutting component, the first cutting component comprises cutters arranged on the cutter disc, the cutters comprise hobbing cutters and scraping cutters, thehobbing cutters comprise the first hobbing cutters distributed on the propulsion surface and the second hobbing cutters circularly distributed on the conical surface, the scraping cutters comprise the first scraping cutters distributed to the material inlet, the second scraping cutters distributed on the propulsion surface and the third scraping cutters circularly distributed on the conical surface, and the second cutting component comprises twist legs which support the cutter disc and rotate and a disc body which forms a crushing gap with the twist legs. According to the mud water balance shield tunnelling machine and a pipe jacking tunnelling construction method by applying the mud water balance shield tunnelling machine, crushed stone obtained by cutter crushing (primary crushing) canenter a crushing bin from the material inlet and further enter the crushing gap to be subjected to secondary crushing under mutual rotational shearing between the twist legs and the disc body.

Description

technical field [0001] The invention relates to the technical field of underground excavation pipeline construction, in particular, to a mud-water balance shield machine and a pipe jacking construction method using it. Background technique [0002] The construction of power tunnels usually adopts the open and cut method to improve construction efficiency. However, for the construction of power tunnels that need to cross special road sections such as existing highways with heavy traffic volume, the open and cut method is not applicable. For road sections where the open cut method is not applicable, a new construction method, pipe jacking construction, has been developed. Pipe jacking construction belongs to the non-excavation construction method, which is a pipeline burying construction technology with no excavation or less excavation. The pipe jacking method uses the jacking force to overcome the friction between the tunneling equipment pipeline and the surrounding soil, s...

AI Technical Summary

Problems solved by technology

In the face of such geological conditions, if traditional manual excavation is used for pipe jacking construction, dewatering treatment is required, resulting in large subsidence and deformation of the ground, making it difficult to ensure the safety of construction personnel. Pipe jacking construction is difficult to handle when large obstacles are encountered on the excavation surface, and when the groundwater level is high, the mud outlet of the screw conveyor may erupt, which will bring major safety hazards to the construction

In addition, the cutter head of the existing shield machine is difficult to cut the large-size pebble formation

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