大奔流沟料场高边坡安全监测动态设计

Dynamic safety monitoring design for high slope of Dabenliugou quarry

大奔流沟料场地形、地质条件复杂,人工开挖边坡达500多米,属特高人工边坡。为确保边坡在施工期和运行期的安全稳定,其安全监测尤为重要。秉承动态安全设计的思路,通过将施工过程中的安全监测和揭露的具体地质情况反馈给设计人员,及时调整安全监测设计方案,使之不断优化,逐步完善,最终达到安全、经济、合理的目标。介绍了设计原则、监测项目、动态设计方法。并对施工期的安全监测成果进行了评价。实践证明,大奔流沟的安全监测设计是成功的,为保障施工安全提供了有力支持。

The Dabenliugou quarry,a large quarry of Jinping Hydropower Station with an extra-high excavated slope height of more than 500 m,is characterized as complex terrain and geological condition.The safety monitoring design for the high slope follows the principle of dynamic optimization,namely the information on safety monitoring and geological condition collected during excavation is provided to the designers to optimize the original solutions,reaching safe and economic goal.We present the design principle,monitoring programs and dynamic design solution,and the safety monitoring data collected in excavation period are analyzed.The engineering practice shows that the dynamic safety monitoring solution for the large quarry is successful and guarantees the safe construction.