混凝土垫层对抽蓄电站引水系统围岩内水压力分担率的影响

发布时间：2018-09-06 15:57

【摘要】：基于FLAC~(3D)软件,通过对比分析工程实测数据、数值仿真和规范方法结果,研究引水系统回填混凝土标号改变对钢衬变形和围岩内水压力分担率的影响。结果表明,现行规范在计算钢衬环向应力时,未考虑混凝土垫层,可能导致计算应力值偏差,进而影响围岩内水压力分担率;垫层混凝土标号由C15增加到C25,虽可减小钢衬的径向位移和环向拉应力,提高围岩内水压力分担率,但效果不显著。
[Abstract]:Based on FLAC~ (3D) software, the influence of the change of backfill concrete label on the deformation of steel lining and the water pressure sharing rate in surrounding rock is studied by comparing and analyzing the measured data, numerical simulation and the results of specification method. The results show that the current code does not take concrete cushion into account when calculating the circumferential stress of steel lining, which may lead to the deviation of calculation stress value, and then affect the water pressure sharing rate in surrounding rock. When the grade of cushion concrete is increased from C15 to C25, the radial displacement and circumferential tensile stress of steel lining can be reduced, and the water pressure sharing rate in surrounding rock can be increased, but the effect is not obvious.
【作者单位】：国网新源控股有限公司技术中心;中国科学院地质与地球物理研究所;
【基金】：国网新源控股有限公司科研项目(JXKJ-2015-03)
【分类号】：TV732

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