坝基措施对高拱坝抗震性能影响的比较研究  

Analysis of Influence of Dam Foundation Treatment Measures on Seismic Performance of High Arch Dam

作　　者：李静 徐强 陈健云 LI Jing;XU Qiang;CHEN Jianyun(Faculty of Infrastructure Engineering,Dalian University of Technology,Dalian 116023,Liaoning,China)

机构地区：[1]大连理工大学建设工程学部,辽宁大连116023

出　　处：《水力发电》2023年第3期63-70,共8页Water Power

基　　金：国家自然科学基金资助项目(52079025)。

摘　　要：拱坝拟建场址的河谷地形、地质条件通常很复杂,坝基处理对于改善拱坝受力状态具有很重要的作用。针对白鹤滩拱坝采取不同的坝基措施(无垫座和扩大基础、设置坝肩垫座、扩大基础),对比分析了在设计地震动下,拱坝位移、横缝开度以及坝体损伤等响应随着地震动强度增大的变化规律。结果表明,采取扩大基础和垫座对于拱坝地震动抗震性能是有利的,坝肩垫座对拱坝整体地震动响应及损伤破坏的影响不大,扩大基础影响较大。The topography and geological conditions of river valley at the proposed site of arch dam are usually very complex,and the treatment of dam foundation has a very important role in improving the stress state of the arch dam.According to the different dam foundation treatment measures of Baihetan Arch Dam(no cushion and expanded foundation,abutment cushion and expanded foundation),the change laws of arch dam displacement,transverse joint opening and dam body damage with the increase of seismic dynamic strength under the designed ground vibration are compared and analyzed.The results show that the extended foundation and cushion are beneficial to improve the seismic performance of arch dam,the abutment cushion has little effect on overall seismic response and damage distribution of arch dam,while the extended foundation has a greater effect.

关 键 词：拱坝 垫座 扩大基础 坝基处理措施 抗震性能 影响 白鹤滩水电站 

分 类 号：TV642[水利工程—水利水电工程] TV312