【作者】 吕辉；

【导师】 许强；

【作者基本信息】 成都理工大学 ， 防灾减灾工程与防护工程， 2007， 硕士

【摘要】 瀑布沟水电站为国家十五计划开工的重点项目，也是四川省实施西部大开发的重点工程。随着水电站泄洪雾化后，将对左、右岸坡的稳定性产生重要影响。因此，研究不同泄洪雾化时段作用下岸坡的渗流特征、水岩相互作用及稳定性问题既是一个复杂的理论课题，也是一个重大的工程应用问题。本文以大渡河瀑布沟水电站为背景，从溢洪道陡槽段边坡所处的地质环境和工程条件入手，详细地分析了该边坡的岩性组合、岩体结构、工程开挖期间的变形破坏迹象及其机制；查明了变形破坏模式即块体失稳、滑移压致拉裂；弄清了影响边坡长期稳定性的关键性因素即地形地貌、坡体结构特征、不合理的开挖爆破、降雨和雾化作用。在此基础上，较为深入系统地分析了泄洪雾化过程中，不同时段雾化雨影响边坡岩体变形破坏的作用机理，尤其是泄洪雾化过程中该边坡地下水位变化特征、渗流场特征和流固耦合后位移场的变化趋势，运用FLCA^3D软件重点研究了边坡从天然状态、开挖状态和雾化作用下的应力场特征及其变形发展趋势，最后采用极限平衡法和有限差分强度折减法计算出不同工况下边坡安全系数。更多还原

【Abstract】 Pubugou Hydroelectric Power Station is an important project for 15 plans of the nation, and Si-chuan Province key project to implement development of western regions too. it will exert an important influence on the stability of the bank slope in the reservoir area accompanied with hydroelectric Power Station store water and after the released floodwater atomization. Thereby, it is not only an complicated theory problem but also an important application of engineering that to percolation characteristic, water rock interaction and stability question of the bank slope under different function of releasing floodwater in atomized period.This paper takes daduhe pubugou hydroelectric power station as the backgroud, and begins with geological environment and project condition of side slope in the spillway chute, analyse the combination of the rock in slope, the structure of rock mass, the evidence of deformable destruction in the period of project excavation and at the foundation of the mechanism, in deserving to in detail, yield the mode of deformable destruction, namely, the clump destabilization, the pull crack leaded by glide and key factor influences permanent stability of slope.: topographical landform, structural feature of slope, unreasonable excavation and blasting, rainfall and atomizing. And then do a deep research in the mechanism of action of the atomized rain effect the slope rock mass deformation in different period during the atomized process of releases floodwater, study change feature of the groundwater level of the slope, the character of seepage flow and variation tendency of displacement field after the flow catenation during the atomized process of releases floodwater, using FLCA3D software study the stress field feature of slope from natural state, excavate state and under the atomizing and development trend of deformation.更多还原