振冲加密技术在碎石土坝坡加固中的应用  

Application of Vibroflotation Compaction Technology in Gravel Soil Dam Slope Reinforcement

作　　者：郭祥初 李秀荣 詹志明 

机构地区：[1]湖北大禹水利水电建设有限责任公司,武汉430061

出　　处：《中国水能及电气化》2015年第2期1-3,共3页China Water Power & Electrification

摘　　要：坛子口水库大坝下游坝坡回填材料为风化碎石土,筑坝时未碾压,比较松散。为解决下游城市生活用水问题及防洪需要,拟对大坝进行加高。为保证大坝安全,大坝加高前拟对下游坝坡风化碎石层进行加固处理。在水库正常蓄水位下,采用振冲加密的方法对下游坝坡进行了加固处理。大坝加高后未出现沉降或裂缝等现象,加固效果显著。Weathered gravel soil is adopted for backfilling downstream dam slope of Tanzikou reservoir dam,which is not rolled during dam construction,therefore the soil is looser. The dam will be heightened according to plan in order to solve downstream urban domestic water consumption problem and flood control demand. Downstream dam slope weathered gravel layer will be reinforced before dam heightening in order to ensure dam safety. Vibroflotation compaction method is adopted for reinforcing downstream dam slope under normal water level in the reservoir. Subsidence or cracks and other problems are not discovered after dam heightening,and the reinforcing effect is significant.

关 键 词：碎石土 振冲加密 液化 相对密度 

分 类 号：TV698.23[水利工程—水利水电工程]