RELATIONSHIP OF TEXTURAL STRESS AND ROCK FAILURE ON THE DIVERSION OF THE TUNNEL
The textural stress has great effect on the stability of rock. According to the measured geo-stress data, through FEM and combined with the linear multivariate regression method, the geo-stress field was analyzed. Based on Yu Maohongs generalized twin-shear strength theory, the failure type was classified into the generalized tension, the generalized compression and the generalized shear. Using these methods, the stress distribution, peculiarity and process of failure in a diversion tunnel of a large-scale hydropower station was analyzed. It was shown that the stress concentration was located at the bottom of the wall and the arch top, the stress in the wall was small and the failure happened at the bottom of the wall and the arch top, and then the bottom board and some areas far from the tunnel. Under the condition without considering textural stress, the stress concentration area located in the wall and the failure happened at the bottom of the wall, then in the middle of the wall and at the arch top, the failure elements were around the tunnel. Based on the deformation observation, it is indicated the textural stress could reflect the real failure process of tunnels.
LING-QIANG YANG YUAN-YUAN LI QING-LIAN SHU
School of Civil Engineering and Architecture.University of Jinan, Jinan 250022, P.R.China
国际会议
The 7th International Symposium on Rockburst and Seismicity in Mines(2009年第七届国际岩爆与微振动性学术研讨会)
大连
英文
1463-1468
2009-08-21（万方平台首次上网日期，不代表论文的发表时间）