Analysis of Stability and Reinforcement of Faults of Baihetan Arch Dam

2011 ◽  
Vol 243-249 ◽  
pp. 4506-4510 ◽  
Author(s):  
Fu Hai Guan ◽  
Yao Ru Liu ◽  
Qiang Yang ◽  
Ruo Qiong Yang
Keyword(s):  
Numerical Simulation ◽  
Model Test ◽  
Stable State ◽  
Arch Dam ◽  
Geomechanical Model ◽  
Measuring Point ◽  
Geomechanical Model Test ◽  
Unbalanced Force ◽  
Damage Law ◽  
Analysis Of Stability

With the deformation reinforcement theory (DRT), numerical simulation of Baihetan arch dam and foundation is carried out. According to the unbalanced forces distribution, fault F18and shear zone LS3318are the key reinforcement regions and unbalanced force of each fault is the corresponding optimal reinforcement force which is to maintain a stable state. To verify the validity of the results of numerical simulation, geomechanical model test of Baihetan arch dam is carried out. By analyzing displacement of corresponding measuring point in the overloading process, and observing failure of transverse section at each elevation, the results show that the unbalanced force distribution of each fault is consistent with the damage law of faults in geomechanical model test.

Study on Predictin of Surface Subsidence of an Exremely Shallow Large-Span Double-Arch Tunnel

2011 ◽  
Vol 396-398 ◽  
pp. 2245-2248
Author(s):  
Xin Zhi Li ◽  
Shu Cai Li ◽  
Shu Chen Li ◽  
Xian Da Feng ◽  
Chao Yuan ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Model Test ◽  
Surface Subsidence ◽  
Tunnel Construction ◽  
Geomechanical Model ◽  
Large Span ◽  
Geomechanical Model Test ◽  
Construction Methods ◽  
Surface Subsidence Control ◽  
Great Wall

The Qi-Great Wall tunnel which crossed the Qi -Great Wall ruins was a large span double-arch tunnel with two-way and six-lane and the maximum depth was less than 5 meters, in order to protect the safety of thr surface ruins in the tunnel construction progress, surface subsidence control was particularly important. Through comprehensive geomechanical model test and numerical simulation , the surface subsidence wich generated in the process of construction according to construction methods of excavation and support was studied, the distribution of surface subsidence got through two methods was fitted well,and research results could provide guidance for the construction.

Geomechanical model test study on stability of concrete arch dam

2004 ◽  
pp. 557-562 ◽  
Author(s):  
Lin Zhang ◽  
Jianye Chen ◽  
Xiaoqiang Liu ◽  
Lin'guang Liu
Keyword(s):  
Model Test ◽  
Arch Dam ◽  
Geomechanical Model ◽  
Concrete Arch Dam ◽  
Geomechanical Model Test ◽  
Test Study

scholarly journals Failure Mechanism and Numerical Simulation of Splitting Failure for Deep High Sidewall Cavern Under High Stress

2021 ◽  
Author(s):  
Fan Li ◽  
Qiangyong Zhang ◽  
Wen Xiang ◽  
Guangyuan Yu
Keyword(s):  
Numerical Simulation ◽  
Model Test ◽  
Strain Gradient ◽  
High Stress ◽  
Three Dimensional ◽  
Strain Gradient Theory ◽  
Geomechanical Model ◽  
Geomechanical Model Test ◽  
3D Geomechanical Model ◽  
Splitting Failure

Abstract With the increase of the depth of the underground engineering, the phenomenon of splitting failure of the deep rock will appear, which is very different from the shallow cavern. In order to reveal the formation mechanism of splitting damage, mechanical model tests and numerical simulations of splitting damage were carried out respectively. Using the Pubugou Hydropower Station as the engineering background, a three-dimensional (3D) geomechanical model test was conducted relying on a high stress three-dimensional load test system. The splitting damage phenomenon of high sidewall cavern was observed, and the oscillation variations of displacement and stress were measured. Based on strain gradient theory and continuum damage mechanics, an elastic-plastic damage softening model for splitting damage was established. The relationship between rock damage and energy dissipation was analyzed. Based on the strain energy density theory, the splitting damage criterion based on the strain gradient is established. A numerical analysis method for splitting damage was proposed, and a regional disintegration calculation program was developed based on a commercial finite element code. The numerical simulation results are in basic agreement with the 3D geomechanical model test.

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