巫山神女峰机场高填方边坡稳定性分析方法研究

以西南地区巫山神女峰机场高填方边坡为例，文章采用不平衡推力法、简化Bishop条分法和有限元强度折减法对某典型剖面在天然、暴雨、清坡天然和清坡暴雨4种不同工况下的稳定性进行对比分析。分析结果表明：该典型剖面暴雨工况下所得的安全系数为1.163，小于建筑边坡工程技术规范规定的安全稳定系数值1.35，表明暴雨工况下存在边坡滑移的风险；其他3种工况下计算所得安全系数均大于规范值，表明边坡处于稳定状态。对于天然与暴雨工况，清表糙坡处理后3种方法下的安全系数较未清坡时分别增加了98%、88%、73%和118%、109%、118%。由此表明，在实际工程中，清表糙坡的工程措施能够显著加强高填方边坡稳定性。

This paper takes the high fill slope of Wushan Shennü Peak Airport in southwest China as an example, adopting unbalanced thrust method, simplified Bishop strip method and finite element strength reduction method to conduct comparative analysis on the stability of a typical profile under four different working conditions: nature, rainstorm, nature with cleared slope and rainstorm with cleared slope. The analysis results show that in rainstorm condition, the safety factor of the typical profile is 1.163, which is below the security and stability factor of 1.35 in the technical code for building slope engineering, indicating that rainstorm carries the risk of slope sliding. The safety factors calculated under the other three working conditions exceed the core value, indicating that the slope is in a steady state. For natural and rainstorm conditions, the safety factors of the three methods after slope surface roughness treatment increase by 98%, 88%, 73% and 118%, 109%, 118%, respectively, compared with untreated slope. The results show that in practical engineering, the measures to remove surface roughness can significantly enhance the stability of high fill slope.