不同渠水位及其骤降对灌溉渠堑坡稳定性的影响分析

Effects of Different Water Levels to Sudden Drop of Drainage Canal Slope Stability

为了研究渠道内不同水位及其骤降对饱和黏性土灌溉渠堑边坡稳定性的影响,本文结合某大型灌区渠堑典型断面,利用SLOPE/W软件分析了不同渠水位下渠堑边坡的安全系数和不同渠水位骤降至渠底面时渠堑边坡的安全系数。结果表明:不同渠水位稳定时安全系数随渠水位的减小呈先减小后小幅增大的趋势,在渠水位为3 m时,安全系数最小;渠水位骤降时安全系数随渠水位的减小呈增大的趋势,曲线由缓变陡再变缓,最后与稳定时零水位的安全系数相同;比较稳定和骤降时的安全系数,可以看出不同水位安全系数的差随水位的降低逐渐减小。

In order to analyze the different channel water level and its impacts on the saturated cohesive plunged canal cutting slope stability,a typical large-scale irrigation canal cutting section was analyzed under different drainage canal water level cutting slope by using SLOPE / W software. The results show that different canal water level is stable safety coefficient with decreasing canal water level increased slightly decreasing trend,when the water level is 3 meters,the minimum safety factor,safety factor with the drainage canal rapid drawdown water level reduction small showed an increasing trend,and the final level of zero safety factor the same time stable,the safety factor is relatively stable and dips and the difference between different safety factor decreases with the level of water gradually decreases.