强降雨条件下岩土互层边坡稳定性分析  

Stability of Rock and Soil Interbed Slopes under the Condition of Heavy Rainfall

作　　者：周勇[1,2] 王栋良[1,2] 赵红[1,2] 王鑫[3] 

机构地区：[1]兰州理工大学甘肃省土木工程防灾减灾重点实验室,甘肃兰州730050 [2]西部土木工程防灾减灾教育部工程研究中心,甘肃兰州730050 [3]华中科技大学武昌分校城市建设学院,湖北武汉430064

出　　处：《甘肃科学学报》2015年第2期60-63,共4页Journal of Gansu Sciences

基　　金：甘肃省自然科学基金项目(1208RJZA158);国家科技支撑计划项目(2011BAK12B07);兰州理工大学红柳青年教师培养计划项目(Q201108);甘肃省高等学校基本科研业务费项目

摘　　要：对强降雨条件下某岩土互层边坡的整体稳定性进行了分析,提出了该边坡不采取支护措施时的合适坡角,并探索了预应力锚杆和框架预应力锚杆柔性支护结构对岩土互层边坡的支护效果。研究结果表明:不采取任何支护形式的岩土互层边坡层理倾角为30°,在考虑强降雨影响时最大安全坡角为40°;强降雨对岩土互层边坡的整体稳定性影响不容忽视,且坡角越大边坡安全系数降幅越大;预应力锚杆以及框架预应力锚杆柔性支护结构对岩体互层边坡支护效果比较显著,但应该考虑强降雨对岩土互层边坡整体稳定性的影响且加大安全储备。The overall stability of a rock and soil interbed slope under the condition of heavy rainfall was analyzed,aproper angle of the rock and soil interbed slope without supporting measures was proposed,and the supporting of the rock and soil interbed slope with the prestressed anchor and grillage flexible supporting structure was explored.The results showed that under the condition of heavy rainfall,about 40°was the maximum safe slope angle of the rock and soil interbed slope（at a bedding dip of 30°）,without any protection measures;the effects of heavy rainfall on the overall stability of the rock and soil interbed slope could not be ignored,and the greater the slope angle was,the more slope safety factors declined;the supporting of the rock and soil interbed slope with the supporting measures was effective,but the influence of heavy rainfall on the overall stability of the rock and soil interbed slope should be considered and the slope safety factors should be increased.

关 键 词：岩土互层 强降雨 预应力锚杆 框架预应力锚杆柔性支护结构 整体稳定性 

分 类 号：TU413[建筑科学—岩土工程]