飞来峡水利枢纽主河床段土坝砂基振冲加固  

Vibroflotatian Compacting for Sand Foundation of Earth Dam on River in Feilaixia Multpurpose Project

作　　者：黄书荣 

机构地区：[1]广东省水利水电第三工程局,广东东莞523710

出　　处：《西部探矿工程》2002年第z1期105-107,共3页West-China Exploration Engineering

摘　　要：飞来峡水利枢纽主河床段土坝 14 .0m高程以下为人工吹填砂及原河床天然砂砾覆盖层 ,不能满足抗 7度地震的要求 ,采用 15 0kW (液压 )、12 0kW (电动 )和 75kW (电动 )振冲器对其进行振冲加固处理。振冲桩按梅花形布置 ,排距2 .6m、桩距 3 .0m ,填料用粗砂或 2～ 8cm粒径碎石。振冲加密处理后砂基相对密度 >70 % ,可以消除The earth dam foundation on the main bed in Feilaixia Multpurpose Project complex that below 14.0m elevation is backfilling sand and gravel cover The dam foundation can not meet the aseismatic requirement at 7°seismic intensity. Three kinds of vibroflots(150kw?120kw?75kw) were used to strengthen the dam foundation. The arragement of vibration holes are quincunx with a row space of 2.6m and distance between holes of 3m. The filling materials are coarse sand or crushed stone with 2～8cm size. It has been shown that the relative density of the sand foundation is more than 70% by vibroflotation compacting. So that the liquefaction resulted from 7 seismic intensity can be prevented.

关 键 词：坝基 砂层 振冲加固 

分 类 号：TU472.3+1[建筑科学—结构工程]