Determination of parameters of the bucket grab for excavation works

Moscow State University of Civil Engineering, Yaroslavskoe shosse, 26, 129337, Moscow, Russia

Corresponding author: cil@bk.ru

Abstract

The construction of underground structures in an urban environment is accompanied by the solution of a number of complex geotechnical problems, including those associated with the creation of a deep underground cavity and a volume of hundreds of thousands of cubic meters. For soils of different categories, the difficulty of developing strata lying at different depths, sometimes up to 50 meters, is utilized by cable grabs. The article is devoted to the possibility of preliminary determination of parameters of the bucket grab for excavation works. For this purposes, existing empirical dependencies and the similarity method are used, which allow choosing optimal parameters of the bucket for specific ground conditions. Analytical calculations showed that the discrepancy between the values of the geometric parameters obtained by each of the methods lies in the range of up to 13%, and the power parameters differ in the range up to 25%. The use of the obtained values of the required parameters, with the indicated discrepancies in their magnitudes, allows to determine the optimum values of any parameter of the bucket for concrete excavations in the development of the underground space of cities.