柔性溢洪道边坡稳定性研究  

Study on Stability of Flexible Spillway Slope

作　　者：岳凡 于沭[2] 李炎隆[1] 周嘉伟 司政[1] 李鹏[1] YUE Fan;YU Shu;LI Yanlong;ZHOU Jiawei;SI Zheng;LI Peng(Institute of Water Resources and Hydro-Electric Engineering,Xi'an University of Technology,Xi'an 710048,China;Department of Geotechnical Engineering,China Institute of Water Resources and Hydropower Research,Beijing 100048,China)

机构地区：[1]西安理工大学水利水电学院,陕西西安710048 [2]中国水利水电科学研究院岩土工程研究所,北京100048

出　　处：《人民黄河》2021年第8期144-147,共4页Yellow River

基　　金：国家自然科学基金重点项目(41731289);国家自然科学基金面上项目(51879285);中国科学院学部咨询评议项目(2018-Z02-A-008)。

摘　　要：为保障柔性溢洪道边坡稳定性,引入土工布加筋措施加固土边坡,并对其加筋形式进行了研究。运用基于塑性力学上限定理的边坡稳定分析方法和库仑滑移模式对不同竖直加筋间距和不同强度土工布的安全系数进行了计算分析,结果表明:采用200 g/m^(2)土工布加筋间距0.3 m、300 g/m^(2)土工布加筋间距0.5 m最为经济且满足安全要求。柔性溢洪道建成后,土工袋对土体施加了侧向围压,因此土工袋边墙对加筋土边坡没有土压力,而当边坡有滑移趋势时,土工袋边墙会产生抗滑力增强边坡的稳定性。In order to ensure the slope stability of the flexible spillway,this paper introduced the geotextile reinforced soil slope to the flexible spillway and concluded the reinforcement forms.The safety factor of different vertical reinforcement spacing,reinforcement length and geotextile with different strength was calculated and analyzed based on the upper bound theorem of plasticity and coulomb slip mode.The result shows that 200 g/m^(2) geotextile with a 0.3 m reinforcement spacing and 300 g/m^(2) geotextile with a 0.5 m reinforcement spacing are the most economical and can meet the safety requirements.When the flexible spillway is completed,the geobag impose lateral confining pressure on the soil,so the side wall of geobag has no pressure on the reinforced soil slope.When the slope has the tendency to slide,the side wall of geobag will produce anti slide force to increase the stability of the slope.

关 键 词：柔性溢洪道 土工布加筋 边坡稳定 安全系数 

分 类 号：U213.1[交通运输工程—道路与铁道工程]