NUMERICAL ANALYSES ON THE STABILITY OF THE UNDERGROUND CAVERNS COMPLEX IN SHUANGJIANGKOU HYDROELECTRIC POWER STATIONS USING FLAC3D
For the time being in China, a great number of hydroelectric power stations are under construction. A large number of high mountains and deep canyons exist in these regions. As a result, the construction of hydroelectric projects is confronted with problems induced by high depth, high in situ stress, high hydraulic pressure, long excavation, and so on. The Shuangjiangkou Hydropower station is located on the Dadu River in Sichuan Province, China. The detailed geological conditions arc described in this paper. From the in-situ rock stress measurement, the maximum principal stress near the underground cavern complex is up to 38MPa. In the study of the stability of the surrounding rock masses in large underground cavern complex, a 3D numerical simulation was performed using Flac3D. This software can simulate the behavior of 3D structures built of rock or other materials that undergo plastic flow when their yield limits are reached. FISH is a programming language embedded in Flac3D that enables the users to define new variables and functions. Some reasonable numerical results have been achieved using Flac3D. The plastic zones and related principal stresses vectors after finishing the whole excavations were determined. Most of the plastic zones are distributed in the vicinity of the side walls of the main power house and the surge chamber. Five representative key points at the side wall in the main power house were empirically selected to estimate the stability of the underground caverns complex. The whole displacement variations of the five key points have been gained in the process of excavations. The maximum displacement value is approximately 15cm, and it is concluded that the underground caverns complex is stable in the process of construction. This research obtained the expected effects and provided guidance for the design and construction of the power station.
YONG LI WEI-SHEN ZHU XIAO-JING LI QIAN-BING ZHANG
Geotechnical and Structural Engineering Research Center, Shandong University, Jinan, 250061, P.R.Chi Geotechnical and Structural Engineering Research Center.Shandong University, Jinan, 250061, P.R.Chin
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
535-540
2009-08-21（万方平台首次上网日期，不代表论文的发表时间）