Boulder stratum earth pressure balance shield wedge-striking cutter mounting structure and design method

Abstract

The invention discloses a boulder stratum earth pressure balance shield wedging cutter mounting structure and a design method. The wedging cutter mounting structure comprises a wedging cutter which is mounted in a cutter box of a shield cutter head; the wedge striking cutter is integrally large in the upper portion and small in the lower portion and comprises an enlarged cutter head on the upper portion and a columnar cutter body on the lower portion, and alloy blocks are arranged on the cutter head and the cutter body. The wedging cutter is installed in a cutter box of the cutter head in a pin joint mode, a buffering reset mechanism is arranged between the bottom of the cutter and the bottom of the cutter box, and the buffering reset mechanism comprises a wedging cutter bottom appearance structure and a buffering rebounding device. According to the boulder stratum earth pressure balance shield wedge-striking cutter mounting structure and the design method, the earth pressure balance shield wedge-striking cutter capable of being applied to the stratum rich in large-particle-size boulder is obtained by designing the wedge-striking cutter mounting structure. The application field of earth pressure balance shield construction is expanded, and the tunneling efficiency of earth pressure balance shield construction in the boulder stratum is improved.

Description

technical field [0001] The invention relates to the technical field of shield tunneling, in particular to shield cutter head and cutter design in shield tunnel construction, in particular to an installation structure and design method of an earth pressure balance shield wedge hammer in a boulder formation. Background technique [0002] With its advantages of safety, reliability, speed, economy, and environmental protection, shield tunneling technology is widely used in construction projects in major cities. Shield tunneling technology has become a commonly used municipal rail transit construction method at home and abroad. Earth pressure balance shield machine is relatively Commonly used, the construction principle of the earth pressure balance shield is to form a balance between the excavated soil and the tunnel face soil to ensure the stability of the tunnel face, and then continue the excavation construction. [0003] Earth pressure balance shield tunneling is mainly comp...

AI Technical Summary

Problems solved by technology

For large pebble boulder formations with high pebble boulder content, large particle size, high strength and strong abrasiveness, the scraper cannot break the large pebble boulders, and due to the strong abrasiveness of the formation, the life of the scraper will be greatly reduced, so the scraper is not suitable as a main cutter for the excavation of large-size pebble boulder formations

[0005] The current general-purpose cutting tools are not suitable for large-sized pebble boulder formations. Therefore, it is necessary to propose a new type of cutting tool for the mechanical characteristics of large-size pebble boulders with high compressive strength and low tensile strength.

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