Method for testing and predicating wearing of excavating device cutter in soft soil environment

Abstract

The invention a method for testing and predicating the wearing of an excavating device cutter in a soft soil environment. The method simulates the actual working condition of engineering through a test technique, and predicts the wearing of the cutter in the actual engineering. The method can be used to scientifically and effectively test the wearing condition of the excavating device cutter in the soft soil environment, the onsite inspection and maintenance of the cutter are guided through the test of the wearing of the cutter, and the actual wearing amount of the cutter is calculated to determine the replacing cycle of the cutter, so inspection and maintenance personnel has no need to frequently enter a pressure chamber in the engineering and detect, the workload is reduced, and the excavating engineering process is improved; and the method fully considers the characteristics of the influences of the soft soil on the wearing of the cutter, and the optimal test running time is determined through preliminary test to make the test result scientific and close to the actual working condition, so the error of the test is reduced to well guide the engineering practice.

Description

technical field [0001] The invention relates to a wear test and prediction method of cutting tools of excavation equipment in soft soil environment. Background technique [0002] Mechanized excavation methods have become more and more common in tunnel construction. As important tunnel construction equipment, roadheaders are widely used in railway tunnels, urban rails and other projects. As the key part of the roadheader, the tool wear is inevitable. In the process of tunnel excavation, especially in the process of excavation in soft soil layers, the inspection and maintenance of cutting tools are usually carried out under pressurized conditions, so the inspection and maintenance personnel must bear the high pressure environment of the soil bin. Inspection and maintenance personnel must first increase the pressure before entering the warehouse, and can only work after reaching the pressure of the soil warehouse. After the tool change is completed, the pressure needs to be lo...

AI Technical Summary

Problems solved by technology

In the existing test device, if the continuous tool test time is too long, the particle shape or particle size distribution of the soil is changed during the test, and the change of the soil particle characteristics may affect the wear characteristics of the soil, the test results of tool wear and The actual situation is quite different, and the test and expected results are also inaccurate

However, the existing soft soil test does not take into account the influence of the duration of the test on the test results, so the existing test results have a large deviation from the actual engineering tool wear