Deformation measurement and numerical stimulation of large-scale underground cavern

作者：Xu, Zhe; Wang, Ying Yi^*; Li, Ke; Huang, Xing Chun

来源：Journal of Shanghai Jiaotong University, 2015, 49(7): 1005-1009 and 1016.

DOI：10.16183/j.cnki.jsjtu.2015.07.015

• 3-D numerical modeling
• Deformation Characteristics
• Deformation measurements
• Horizontal displacements
• Numerical stimulations
• Surrounding rock mass
• Underground cavern
• Vertical displacements

Taking a large-scale underground cavern of hydropower station for example, a 3D numerical model was established to obtain the deformation characteristics of the surrounding rock mass after excavation of the cavern, and the influence of pre-stress loss of the anchor rope on the surrounding rock mass deformation and stress state was analyzed. The rationality of the simulation method and the feasibility of the support measures was analyzed by comparing the simulation results with the measured results. The results show that the max horizontal displacement occurs at the middle of the sidewall, while the max vertical displacement occurs in the top of the arch, and in the intersect area of the cavern the deformation is significant. The simulation results are very close to the measured results which can show the actual excavation process and the deformation characteristics of the surrounding rock mass. The horizontal displacement significantly increases when the pre-stress loss in anchor rope comes to a certain degree.

• 出版日期2015
• 单位上海交通大学