Influence Research and Engineering Applications of Overload Frequency on Dam Stability Model Tests Results

被引：0
|
作者：
Zhu Z. [1 ,2 ]
Qi L. [1 ,2 ]
Yang B. [2 ]
Chen Y. [2 ]
Zhang L. [2 ]
机构：
[1] Sichuan Water Conservancy Vocational College, Chengdu
[2] School of Water Resources & Hydropower, State Key Lab. of Hydraulics and Mountain River Eng., Sichuan Univ., Chengdu
来源：
Qi, Ling (516989558@qq.com) | 1600年 / Sichuan University卷 / 52期
关键词：
Dam stability; Degree of influence; Engineering application; Geo-mechanical model test; Overloading frequency; Reasonable value;
D O I：
10.15961/j.jsuese.201900809
中图分类号：
学科分类号：
摘要：
Geomechanical model test is one of the important methods to study the stability and safety of dams. It selects a certain overload frequency to carry out step-by-step overloading test to obtain the results of displacement, strain, failure process and failure mode of the model dam, and to evaluate the stability and safety of the prototype dam project. Therefore, the choice of overload frequency directly affects the reliability of the test results and requires in-depth research. Aims at the impact of overload frequency on model test results and the selection of reasonable overload frequency, the geomechanical model tests with different overload frequencies (ΔP=0.2P, 0.5P, 1.0P) are carried out. The influence of overload frequency on the results of geomechanical model test is analyzed. Combined with the numerical calculation and the results of the rigid body limit equilibrium method, the reasonable value of the overload frequency is comprehensively analyzed and determined, that is, ΔP=0.2P. On this basis, the research results are applied to the stability study of the typical dam section of Danba hydropower station, and the geomechanical model test is carried out. Through the test, the displacement distribution characteristics and displacement curve, failure process and failure mode and overload stability safety coefficient of the dam and dam foundation of Danba hydropower station are obtained. The stability of the dam foundation of the typical dam section of Danba hydropower station is evaluated. The research results provide a scientific basis for the loading method of the dam stability geomechanical model test and help to improve the reliability of the test results. © 2020, Editorial Department of Advanced Engineering Sciences. All right reserved.
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页码：95 / 102
页数：7
相关论文
共 12 条
  • [1] Zhang C., Crucial techniques high dams and hydroPower projects, Journal of China Three Gorges University (Natural Sciences), 26, 3, pp. 193-197, (2004)
  • [2] Shen T., Development of geomechanic model experiment techniques, Journal of Yangtze River Scientific Research Institute, 18, 5, pp. 32-35, (2001)
  • [3] Yang B., Xiong K., Chen Y., Et al., Deformation monitoring information of geo-mechanical model test and its application in engineering, Journal of Sichuan University (Engineering Science Edition), 47, 4, pp. 17-24, (2015)
  • [4] Dong J., Zhang L., Xu Y., Et al., Application of catastrophe theory to determine the instability criterion for geo-mechanical model test, Advanced Engineering Sciences, 49, 4, pp. 18-25, (2017)
  • [5] Zhang L., Liu Y., Yang Q., Et al., Geomechanical model test on global stability of a arch dam at Dagangshan, Chinese Journal of Rock Mechanics and Engineering, 33, 5, pp. 971-982, (2014)
  • [6] Yang B., Zhang L., Chen Y., Et al., Experimental and numerical comprehensive analysis on overall stability of Jinping Ⅰ high arch dam, Journal of Hydraulic Engineering, 48, 2, pp. 175-183, (2017)
  • [7] Chen Y., Zhang L., Yang B., Et al., Geomechanical model experiment of global stability of Lizhou arch dam on Muli River, Chinese Journal of Rock Mechanics and Engineering, 31, pp. 3928-3935, (2012)
  • [8] Zhang Q., Li S., Li Y., Et al., 3D geomechanical model test research on stability and supporting for surrounding rock mass of a large-scale diversion tunnel, Chinese Journal of Rock Mechanics and Engineering, 26, pp. 4051-4059, (2007)
  • [9] Zhu W., Li Y., Zhang L., Et al., Geomechanical model test on stability of cavern group under high geostress, Chinese Journal of Rock Mechanics and Engineering, 27, 7, pp. 1308-1314, (2008)
  • [10] Dong J., Xie H., Zhang L., Et al., Experimental study of 3D geomechanical model on global stability of Dagangshan double curvature arch dam, Chinese Journal of Rock Mechanics and Engineering, 26, 10, pp. 2027-2033, (2007)
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