哈达山工程土坝砂土振冲加密试验检测分析  

Hadashan Project Earth Dam Sand Soil Vibroflotation Infilling Test Detection and Analysis

作　　者：冯伟[1] 王俊杰[1] 杨伟[1] 

机构地区：[1]中水东北勘测设计研究有限责任公司,吉林长春130021

出　　处：《资源环境与工程》2009年第5期663-666,共4页Resources Environment & Engineering

摘　　要：哈达山水利枢纽工程位于第二松花江下游河段,距第二松花江与嫩江汇合口处约60 km,挡水土坝坝顶全长19304.0 m。枢纽工程区地震动峰值为0.2g,相应地震基本烈度为Ⅷ度,土坝抗震设防烈度为Ⅷ度。鉴于挡水土坝段处于饱水状态下的砂土地基存在地震液化问题,故需对处于饱水状态下的砂土地基进行抗液化处理,初步拟定抗液化处理方案为振冲桩加密。为选择合理的施工技术参数,选择有代表性的地段作为试验区进行试验及综合分析与合理评价。Hadashan hydro-junction project locates in the downstream reach of second Songhua River, 60 km from the junction of second Songhua River and Neng River, and the full length of the water retaining earth dam crest is 1 930.40 m. The peak ground shaking of the junction project area is 0.2 g, relevant seismic basic intensity is eight degree, and seismic fortification intensity of the earth dam is eight degree. In view of the sand foundation of water retaining earth dam section has a problem seismic liquefaction under water retention condition, so the sand under water retention condition foundation needs anti-liquefaction treatment, and a scheme of anti-liquefaction treatment is studied out as vibroflotation pile infilling. In order to choose reasonable parameter of construction technique, we choose representative section as test area for comprehensive analysis and rational evaluation.

关 键 词：振冲 抗震设防烈度 标贯试验 分析 评价 

分 类 号：TU472.31[建筑科学—结构工程]