Analysis of monitoring results of foundation of Left-Bank Powerhouse of Three Gorges Project

摘要

It briefly analyses the basic information on foundation seepage flow and pressure and rock mass sedimentation deformation & horizontal deformation of founation rock mass, on which Left-Bank Powerhouse dam section No. 1 to No. 5 are based, during the construction of superstructure. The preliminary analysis shows that deformation of rock mass is reasonable and foundation anti-leakage and drainage facilities have achieved the anticipated effect. Principally the rock body behind the main drainage wall of the foundation is basically in dry condition. The seepage pressure of the dam foundation and the joint face of deep rock mass are far smaller than the designed value. The dam foundation seepage pressure is safe, and the structure runs normally.