Design method of cutter head for full-face rock tunneling machine with high-pressure water jet

Abstract

The invention discloses a design method for cutterheads of a high-pressure water jet full-face rock tunnel boring machine and belongs to the technical field of tunneling of full-face rock tunnel boring machines. In the design method, according to the overall arrangement of the cutterheads, the two cutterheads which are of the completely identical structure, rotate synchronously and arranged in a cross-shaped spoke mode are adopted, the second cutterhead rotates anticlockwise relative to the first cutterhead by 45 degrees so as to be installed, and each cutterhead is composed of five components. According to the design method, the integral hob structure of traditional TBM cutterheads is changed, the arrangement in the form of spokes form two cross shapes is adopted, rock breaking is achieved through the impact of water jet on the four spokes and the rotary squeezing of a tool, and the characteristics that water jet machining is high in efficiency, low in energy consumption and easy to achieve are utilized; and high-pressure water is used for cracking rocks, expanding cracks and even breaking the rocks, the rock breaking resistance of the tool is reduced, and the service life of the tool is prolonged.

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...

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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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