复杂基岩重力坝施工中应力稳定性以及加固方案研究  

Study on Stress Stability and Reinforcement Scheme in Construction of Complex Bedrock Gravity Dam

作　　者：陈勇军 CHEN Yong-jun(Guangdong Province Water Conservancy and Hydropower Third Engineering Bureau Co.Ltd.,Dongguan 523000,Guangdong,China)

机构地区：[1]广东省水利水电第三工程局有限公司,广东东莞523710

出　　处：《水利科技与经济》2023年第1期62-67,共6页Water Conservancy Science and Technology and Economy

摘　　要：应力稳定性分析是重力坝设计的重要基础条件,采用有限元软件ABAQUS,结合复杂基岩条件下的工程情况,考虑断裂带和薄弱夹层对作用于坝基岩下的静力分析影响,分析大坝在不同工况下的横倾应力,并对重力坝改造措施的安全性进行评价。当弹性模量比取值为0.25~8.0时,坝脚处的最大拉应力取值区间为1.613~4.024 MPa。折减系数k值为2.7~2.8之间,两个方向位移均发生突变。随着施工高度和蓄水高度的增加,地基上部水荷载均增加。研究成果可为实际工程设计提供技术依据,对类似重力坝的结构分析具有一定的参考价值。Stress stability analysis is an important basic condition of gravity dam design. The research followed finite element software ABAQUS,combined with engineering research under complex bedrock conditions, considering fault zone and weak interlayer, analyzed the influence of static analysis under bedrock on dam lateral stress under different working conditions, and evaluated the safety of gravity dam reconstruction measures. When the elastic modulus ratio is 0.25~8.0,the maximum tensile stress at the dam foot is 1.613~4.024 MPa. The reduction coefficient k is 2.7~2.8, and the displacement in both directions is abrupt. With the increase of construction height and water storage height, the water load on the upper part of foundation increases. The research results provide important technical basis for practical engineering design, and have certain reference value for structural analysis of similar gravity dams.

关 键 词：重力坝 坝踵应力 加固措施 抗滑稳定 

分 类 号：TV642.3[水利工程—水利水电工程]