【作者】 王强； 方理刚；

【Author】 WangQiang;FangLiGang Department of Civil And Architectural Engineering,Central South University,Changsha 410075 China Department of Civil And Architectural Engineering,Central South University,Changsha 410075 China

【机构】 中南大学土木建筑学院；

【摘要】 为了确保高速公路的安全,需要对高速公路边坡进行评估。本文分析了表耒高速公路K244+400～K244+800段谢家湾路基开挖引起的滑坡原因。现场实测得知,路基开挖后该边坡处于即将滑动的极限平衡状态,应用极限平衡原理,采用三个剖面,建立平衡方程,应用最小二乘法反演了滑动面的内摩擦角Φ和黏聚力C。由反演的C和Φ,采用条分法计算了在一定的安全下需要提供的抗滑力F。本文针对锚桩支护方案,进行了平面布置与结构计算与分析,最后对边坡锚索的锚固力及其损失进行了长时间的监测。更多还原

【Abstract】 Ensuring the stability of highway slope requires an evaluation of the slope. This paper describes somereasons inducing the failure of the slope located in from K244+400 to K244+800 of Leiyang-Yizhangexpressway. As is known from monitoring in-situ, the newly-cut slope is in the limit equilibrium status. Accordingto limit equilibrium principal of slope, a back analysis has been made to determine the cohesive factor C andinternal friction angle φ of pre-existing potential instable discontinuities. Based on the C and φ determinedabove, for the sake of safety, anti-slipping force that required to supply to support potentially unstable slope hasbeen calculated by limited equilibrium method. Anti-slipping pile scheme was adopted by way of detailedcomparison on technology and economy in the design. Consequently, plane layout and structure design ofpre-forced cable and anti-slipping pile have been done. Finally, the reasons of anchoring force losses have beenanalyzed.更多还原