象鼻岭水电站BT2堆积体治理设计

Harnessing Design for BT2 Alluvial Deposit in Xiangbiling Hydropower Station

象鼻岭水电站工程BT2堆积体位于进水口上游约50 m,213国道改线段通过堆积体前缘,国道改建切脚开挖,BT2堆积体产生变形,出现后缘拉裂、前缘剪出等破坏。经过多方案研究采取了减载、支挡、排水等综合治理措施,后经历了多次暴雨、水库蓄水和1次6.5级地震,经监测成果分析,BT2堆积体经过治理后已处于稳定状态,达到了预想效果。

BT2 alluvial deposit in Xiangbiling Hydropower Station is 50 m away from upstream of the power intake. The rebuilt national highway No.213 passes the front edge of the deposit. Construction of the national highway cuts the foot of the BT2 deposit and the de-posit deforms accordingly. Then the rear edge of the deposit cracks because of tensioning and the front edge shears. The comprehensive harnessing measures such as load reduction,support and drainage,etc. are taken through comparison o couples of schemes. Through analysis on the monitoring data,it finds that the deposit is stable after it is experienced rainstorms,impounding and one 6.5 degree arthquake. The expected harnessing effect is achieved.