Design method for cutterheads of high-pressure water jet full-face rock tunnel boring machine

Abstract

The invention discloses a high-pressure water jet full-section rock boring machine cutterhead design method, which belongs to the technical field of full-section rock boring machine excavation, and relates to a high-pressure water jet full-section rock breaking cutterhead design method. In the design method, the overall layout of the cutterhead adopts two cutterheads in the form of synchronously rotating cross-shaped spokes with the same structure. The second cutterhead is installed counterclockwise by 45° relative to the first cutterhead. Each cutterhead is composed of five Component composition. The design method has changed the integral hob structure of the traditional TBM cutter head. Two cross-shaped spoke layouts are adopted. The rock is broken through the impact of water jets on the four spokes and the rotary extrusion of the cutter. It utilizes the high processing efficiency of water jets. , low energy consumption, and easy to implement, using high-pressure water to make rocks crack and expand or even break, which reduces the resistance of the tool to breaking rocks and prolongs the life of the tool.

Description

technical field [0001] The invention belongs to the technical field of full-section rock excavation machines, and relates to a design method for a cutter head of a high-pressure water jet full-section rock-breaking excavation machine. Background technique [0002] In recent years, full-face rock boring machines have been widely used in the construction of water conservancy projects, railway transportation, subway projects, oil and gas pipelines and national defense tunnels in China. But most of these projects use traditional tunneling methods, which use rotating disc-shaped cutterheads and pressure on the blade face to cut through the rock. Although compared with the original drill and blast method, the TBM tunneling device overcomes the shortcomings of its low degree of mechanization, low labor productivity, low equipment utilization and low safety. However, due to the harsh working environment, high hardness of the rock, and severe wear of the hob, constant maintenance an...

AI Technical Summary

Problems solved by technology

Chinese patent number: CN103244119A, the patent name is "Arrangement Method and Structure of High-Pressure Water Jet in TBM Cutterhead". The water nozzle method improves the rock-breaking efficiency through the characteristics of rock joint expansion or crushing under the impact of high-pressure water, but because the original overall disc structure of the cutter head is not changed, the cutter head structure is huge and the manufacturing cost is high.

However, due to the need for rock holes in the rock breaking process, it is not suitable for continuous rock breaking operations with large sections

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