夹岩水利枢纽工程左岸边坡施工期变形分析

Deformation Analysis of Left Bedding Bank Slope of Jiayan Water Conservancy Project

夹岩水利枢纽工程左岸泄洪洞洞室群布置区域为顺层边坡,其间发育有RJ_(1)~RJ_(5)软弱夹层和F_(5)、f_(15)、f_(17)等断层,在施工后边坡存在滑动破坏的风险。基于左岸边坡地质资料对施工期监测数据进行分析,并对边坡开挖和支护全过程进行数值模拟计算,阐明了边坡变形规律和控制因素,监测数据和数值模拟结果均表明施工期及开挖完成后边坡整体稳定,其开挖和支护设计是合理的。

The arrangement area of spillway cavern group on the left bank of Jiayan Water Conservancy Project is bedding rock slope,and there develops RJ_(1)-RJ_(5) weak interlayer and F_(5),f_(15),f_(17) and other faults.There is a risk of slope sliding after construction.Based on the engineering geological conditions of the left bank slope,the monitoring data during the construction period was analyzed and numerical simulation was carried out for the whole process of excavation and support of the slope to clarify the deformation law and control factors of the slope.The monitoring data and numerical simulation results show that the slope is stable as a whole during the construction period and after the excavation is completed,and its excavation and support design is reasonable.