Design and Practice of High Mountain Slope Engineering in Rail Transit Parking Lot
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摘要: 以某城市轨道交通停车场建设项目为例，介绍了碎块状强风化砂岩超高山体边坡工程设计要点。该项目为地下停车场，埋深约13 m，停车场与边坡支护结构相分离，边坡最大高度55.0 m，综合考虑场地地层以及周边环境要求，边坡支护采用桩锚+锚杆格构梁的支护方案。项目实施过程中对边坡进行全过程监测，监测结果表明，该支护方案合理安全，可供类似工程参考。Abstract: Taking an urban rail transit parking lot construction project as an example, the key points of the engineering design of the fragmented strongly weathered sandstone super-mountain slope are introduced. The project is an underground parking lot with a buried depth of about 13 m. The parking lot is separated from the slope support structure and the maximum height of the slope is 55.0 m. Considering the requirements of the ground and surrounding environment, the support scheme of pile anchor + anchor bar lattice beam is adopted for slope support. During the implementation of the project, the whole process of slope monitoring is carried out. The monitoring results show that the support scheme is reasonable and safe, which can be used as reference for similar projects.
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Key words:
- high slope /
- highly weathered sandstone /
- slope design /
- parking lot
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表 1 南侧边坡典型剖面锚索参数表
锚索位置 入射角度/（°） 锚索配筋 锚索总长/m 锚固段长度/m 自由段长度/m 轴力标准值/kN 轴力设计值/kN 锁定值/kN 第一道 15 4根钢绞线 20.5 13.0 7.5 340 510 305 第二道 15 4根钢绞线 18.5 12.5 6.0 335 500 300 第三道 15 4根钢绞线 14.5 9.5 5.0 255 380 230 
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表 2 不同工况下边坡稳定安全系数计算表
工况 总下滑力/kN 总抗滑力/kN 最小安全系数 一般工况 19547.537 29673.920 1.518>1.35 地震工况 20395.221 29174.783 1.430>1.15
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