Effect of Local Weak Rock Mass on the Deformation and Stress Distribution of Gravity Dam
This paper discusses the influence of local weak rock mass on the deformation and stress distribution of gravity dam.Combined with a gravity dam project,a three-dimensional finite element model including dam body,bedrock,weak rock mass,fault and joint structure was established,and the deformation and stress distribution under the main load such as dead weight and water load are analyzed using ABAQUS finite element software.The results show that the locally weak rock mass has a significant influence on the deformation and stress distribution of the gravity dam,especially on the settlement and horizontal displacement of the dam mass.Under the finished construction condition,the weak rock mass has the greatest impact on uneven settlement and dam deformation,the settlement of the typical dam heel is less than 2mm,7.84%,the displacement along the river is 12.78%,and the horizontal displacement is 44.87%.The weak rock mass has the greatest influence on the compressive stress at each section,especially at the 1-1 and 2-2 sections,where the increase of the compressive stress at the dam bottom reaches 1.96 times and 6.21%,respectively.In contrast,fault F11 and joints FC09 and FC12 had less effect on the deformation and stress distribution.The research provides important theoretical basis and practical guidance for similar projects.
gravity damweak rock massfaultjointdeformationstresssensitivity analysis
国家科技期刊平台
NSTL
万方数据
