典型工况下填方路基稳定安全系数取值探讨

Study on Safety Factors of Embankment Stability Under Typical Working Conditions

针对现行相关规范填方路基稳定安全系数与所处正常工况、暴雨或连续降雨工况、地震荷载作用工况这3种典型工况不相匹配的问题,通过算例和相关规范稳定安全系数取值分析,对填方路基稳定安全系数取值进行了探讨,提出3种典型工况条件下,基于简化毕肖普法的路基稳定安全系数建议值。研究结果表明：不同等级公路在正常工况、暴雨或连续降雨工况、地震荷载作用工况这3种典型工况下,路基稳定安全系数取值分别为1.3~1.35,1.15~1.25,1.10~1.20。

Current spec stability could not matc earthquake. Calculation ifications for determination of safety factors of highway embankment h actual engineering conditions, such as normal condition, heavy rain and method for safety factors of highway embankment was discussed through examples of engineering and analysis of related specifications for evaluation of safety factors. Determination of safety factors was proposed under 3 typical working conditions based on concise Bishop method. The results show that recommendation of safety factor is 1.3 to 1.35 for normal condition, 1.15 to 1.25 for heavy rain or long-term rainfall, and 1.10 to 1.20 for seismic load for different highways.