Citation

You ZM, Chen JP. Disaster Adv. 2013; 6(3): 56-61.

Copyright

(Copyright © 2013, Shankar Gargh)

DOI

unavailable

PMID

unavailable

Abstract

Based on the geological conditions and measured data of in-situ stress in DaPing mountain tunnel, the initial geostress field of tunnel area is analyzed by 3D multivariate FE regression. A 3D FE computational model is established to compute geostress in four cases, including gravity, tectonic stress field for horizontal extrusion and shear. And the regression coefficients are solved using the least square method and then the calculation value of the measured points, eventually the regression stress field of the whole area especially important engineering parts. Through comparison between the calculated and measured geostresses of measuring points, it is found that these two are similar which suggests that the geostress field obtained by regression is reasonable and conforms to the historical background of geological structure. The results of the geostress field have important reference value of the dynamic design and construction of projects.