巴中车站高边坡破坏机理分析及整治措施

广巴铁路乐巴段的巴中车站(D1K154+700~D1K155+080)左侧高边坡最高达50 m,地层为全、强风化中生代红色泥岩、砂岩,卸荷作用强烈。原边坡加固工程施工后,历经地质变化、停工、暴雨、地震等不利因素影响,产生破坏。在补充勘察的基础上,重新对边坡的稳定性进行了分析、计算及再评估,采用桩板墙和锚杆(索)框架梁等综合措施进行加固,确保了边坡施工及铁路运营的安全。

Analysis on Failure Mechanism of High Slope at Bazhong Railway Station and the Countermeasures

The high slope, which locates at the left side of Bazhong Station (D1K154+700～D1K155+080) in Leba-Bazhong Section of Guangyuan-Bazhong Railway, is 50 m in height with the strata there of fully or intensely weathered Mesozoic red mudstone and sandstone, leading to strong unloading effect. After reinforcement of the original slope, the failure arose out of geological variation, work stoppage, rainstorm, earthquake and other unfavourable factors. Thus the slope stability was analyzed, calculated and evaluated again depending on the supplementary surveys so that comprehensive measures, such as slab-pile wall and anchor bolt (cable) framework, were used for reinforcement to ensure the safety in the slope construction and railway operation.