A kind of installation structure and design method of wedge cutter of boulder formation earth pressure balance shield

Abstract

The invention discloses an installation structure and a design method of a wedge hammer for a boulder stratum earth pressure balance shield. The whole has a large upper part and a small lower part, including the enlarged cutter head of the upper part and the cylindrical cutter body of the lower part, and the cutter head and the cutter body are arranged with alloy blocks; A buffer reset mechanism is arranged between the bottom of the tool and the bottom of the tool box, and the buffer reset mechanism includes an outer shape structure of the bottom of the wedge knife and a buffer and rebound device. The invention provides an installation structure and a design method of a wedge hammer for an earth pressure balance shield in boulder stratum. By designing the wedge hammer installation structure, an earth pressure balance shield that can be applied in a stratum rich in large-sized boulders can be obtained. Wedge striker. The application field of earth pressure balance shield construction is expanded, and the excavation efficiency of earth pressure balance shield construction in boulder formation is improved.

Description

technical field [0001] The invention relates to the technical field of shield tunnel construction, in particular to the design of shield cutter heads and cutters in shield tunnel construction, in particular to a boulder stratum earth pressure balance shield tunnel wedge cutter installation structure and design method. Background technique [0002] Shield construction technology is widely used in the construction of major cities due to its advantages of safety, reliability, speed, economy and environmental protection. Shield construction technology has become a commonly used municipal rail transit construction method at home and abroad. Commonly used, the construction principle of earth pressure balance shield is to ensure the stability of the face by forming a balance between the excavated soil and the soil of the face, and then continue the excavation construction. [0003] The earth pressure balance shield tunneling mainly relies on the cutter head and the cutter installed...

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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