DEVELOPMENT OF A FINITE ELEMENT CALCULATION SCHEME FOR DETERMINING THE STRAIN STRESS OF A TUNNEL CONTOUR IN A HETEROGENEOUS TRANSTROPIC MASSIF, TAKING INTO ACCOUNT GEOSTATIC AND TECTONIC FORCES
Keywords:
transtropic massif, tunnel contour, finite element method, geostatic pressure, tectonic stresses, isoparametric element, overrelaxation.Abstract
This article presents a finite element method for modeling the stress-strain state of a tunnel contour built in a heterogeneous inclined-layered massif with a transtropic structure. The authors developed an algorithm for jointly accounting for geostatic loads based on Dinnik's hypothesis and horizontal tectonic forces varying with depth according to the empirical Hast relationship. Using quadrangular eight-node isoparametric elements, a computational model of the underground structure was developed and the application of the successive over-relaxation method for effectively solving a system of equations was substantiated.
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