Wear-resistant optimized arrangement design method of shield spoke type cutterhead front cutter

Abstract

The invention discloses a wear-resistant optimized arrangement design method for a shield spoke type cutterhead front face cutter. The wear-resistant optimized arrangement design method comprises the steps that a cutterhead form is selected, wherein an eight-spoke type cutterhead composed of four main spokes and four auxiliary spokes is adopted as a cutterhead; the arrangement levels of the tearing knives are designed, wherein the tearing knives are designed into n levels in the radius increasing direction; a tearing cutter is arranged, wherein only one high tearing cutter B is arranged on each radius path of the cutter head; designing the arrangement levels of the cutters: designing k levels of the cutters along the radius direction from small to large; the cutter and the tearing cutter are arranged according to radius paths, namely, the cutter and the tearing cutter do not exist at the same time on the same radius path of the same cutter beam. According to the method, the traditional cutterhead cutter arrangement concept that the longer the cutting path is, the more the cutters are arranged is abandoned, fewer cutters are arranged, configuration is more concise, and the effect of low abrasion is achieved through fewer cutter configuration, so that cutter replacement of the long-distance shield is avoided, the construction period is shortened, and the construction cost is reduced.

Description

technical field [0001] The invention relates to the technical field of shield tunneling equipment, in particular to the design of cutterhead cutters for shield tunneling, in particular to a wear-resistant optimization design method for front cutterhead cutters of shield tunneling. Background technique [0002] In the stratum with poor gradation of sand, pebbles and pebble boulders, high quartz content, and strong abrasiveness, the cutterhead and cutter are prone to wear, and even the cutter may collapse and fall off, resulting in serious situations such as cutterhead failure. In typical sand and pebble formations such as Beijing, Shenyang, Chengdu, etc., the construction of earth pressure balance shields generally adopts spoke cutterheads with an opening ratio greater than 60%, and long-term engineering applications and field evaluations have also proved that this kind of cutterhead selection type correctness. But the facts show that the wear of the tool is still very serio...

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Problems solved by technology

[0003] In order to solve the above problems, the purpose of the present invention is to propose a wear-resistant optimization design method for the front cutter of the shield spoke type cutterhead, so as to solve the problem of high wear or conservative configuration in the conventional selection and configuration of the cutter

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