玉滩水库枢纽工程基础处理设计

Foundation Treatment Design of Yutan Reservoir Extension Project

重庆市玉滩水库扩建工程为大(2)型Ⅱ等工程,枢纽工程由主坝、Ⅰ～Ⅶ共7座副坝、溢洪道、左右岸灌溉引水隧洞等建筑物组成,各建筑物基岩主要为泥岩、砂岩和粉砂岩,属软岩,风化强烈,完整性较差,透水性为弱—较强,并发育有软弱夹层,但一般规模较小,延伸长度不大。经对各建筑物进行有针对性的基础处理,如基础开挖、帷幕灌浆、固结灌浆和钻设锚杆等,使各建筑物均能满足工程正常运行要求。

Yutan Reservoir Extension Project falls into Class II(2),it is composed of main dam,I^VII auxiliary dams,spillway,right bank and left bank irrigation diversion tunnels.The bedrocks are mainly mud rock,sand rock and silt rock,belonging to soft rock,they are characterized by strong weathering,poor integrity,poor to strong permeability,and weak interlayer is developed with small scale and little extension.After taking some foundation treatment measures such as foundation excavation,curtain grouting,consolidation grouting and drilling anchor rod,all the structures can meet the requirements of normal operation of the project.