Wear prediction method for shield tunneling hob

Abstract

The invention discloses a wear prediction method for a shield tunneling hob. The wear prediction method for the shield tunneling hob comprises the following steps that a unit displacement wear loss caused by a plastic removal mechanism, a unit displacement wear loss caused by a brittle fracture mechanism, a unit displacement wear loss caused by adhesive wear, a unit displacement wear loss caused by fatigue wear, a rock breaking arc length generated when a point on the front side of the hob rotates by one circle, a spatial rock breaking arc length generated when a point on the side face of thehob rotates by one circle, a normal cutting force of the hob, and a horizontal force borne by the hob are acquired; the radial wear and wear size of the front side of a hob ring caused when the hob rotates by one circle are worked out; the wear loss and wear size of the side face of the hob ring caused when the hob rotates by one circle are worked out; the four wear losses are multiplied by corresponding fitting coefficients, and the products are added to obtain the wear size of the front side and the wear size of the hob ring; and a wear prediction model is generated, and the wear is predicted. By the adoption of the wear prediction method, the service life of the shield tunneling hob can be predicted, the prediction precision can be improved, and the problems of severe wear of the hob and frequency opening of a bin are solved.

Description

technical field [0001] The invention relates to shield tunnel construction technology, in particular to a method for predicting wear of shield hob cutters. Background technique [0002] With the rapid expansion of population and the acceleration of urbanization, the problems of poor land resources and ground traffic congestion have become more and more serious. Public facilities, roads and bridges have covered a large area of ​​ground space. Therefore, the development of underground space and the rapid construction of urban subways are crucial to urban construction. very urgent. Due to its fast construction speed, strong adaptability to complex strata, and less interference to the surrounding environment, shield tunneling has been rapidly developed and widely used, and has increasingly become the preferred construction method for urban subways. [0003] During the construction process of the shield method, the hob installed on the cutter head is the main tool for excavating...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method for predicting the tool wear of the shield hob, which can predict the service life of the shield tool when applied, and can improve the prediction accuracy, and solve the problem of severe tool wear and frequent opening And other issues

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