通过长期的工程实践和总结,针对西南岩石高边坡特殊的地质特点,提出了边坡表面、浅部、深部和微震监测相结合的新型变形稳定监测方法;利用边坡监测成果,结合地质条件和边坡失稳模式,对大岗山右岸边坡卸荷裂隙密集带变形的施工响应关系进行分析,总结卸荷裂隙密集带的变形特征,并分析其对边坡稳定的影响,最后通过与RFPA3D数值模拟的结果进行对比,常规监测、微震监测、数值模拟成果相互验证了卸荷裂隙密集带对边坡安全稳定的影响主要体现在边坡岩体沿结构面的错动变形上。
Abstract
In the light of special geological conditions of high rock slope in southwest China, we propose a new monitoring method which integrates the monitoring of slope surface, shallow-layer, deep-layer and microseismic monitoring based on long-term engineering practice and summary. According to monitoring results and the geological conditions and slope failure mode, we analyze the deformation of area with dense unloading fissures responding to slope excavation, and summarize the deformation characteristics and analyze its influence on slope stability. The area with dense unloading fissures on the right bank slope of Dagangshan hydropower station is taken as a case study. Furthermore, we compare the conventional monitoring results and microseismic monitoring results with the results of numerical simulation by RFPA3D. The comparison reveals that the influence of dense unloading fissures is mainly reflected in the slope rock mass structure along the surface deformation.
关键词
大岗山水电站 /
边坡监测 /
微震监测 /
卸荷裂隙密集带 /
高陡边坡 /
稳定性影响与分析
Key words
Dagangshan Hydropower Station /
slope monitoring /
microseismic monitoring /
dense unloading fissures /
high-steep slope /
stability analysis
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参考文献
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