茅草街大桥湖区淤泥质软土地层大孔径钻孔灌注桩施工技术.pdfVIP

2008 4 1 06 CONSTRUCTION TECHNOLOGY 37 4 茅草街大桥湖区淤泥质软土地层大孔径 钻孔灌注桩施工技术 1 2 刘 霁 , 聂赛武 ( 11 湖南城市学院, 湖南 益阳 413000; 21 湖南省益阳公路桥梁建设有限责任公司, 湖南 益阳 413000) [ ] , , , , , , , , , 54 , [ ] ; ; ; [ ] TU753165 [ ] A [ ] 1002-8498(2008) 04-0106-03 Construction Technology of Large-diameter BoredPiles in Mucky Soft Soil Foundation of Maocaojie Bridge 1 2 Liu Ji , Nie Saiw u ( 1.H u. nan City University , Yiyang , H u. nan 413000, China ; 2.Hu. nan Yiy ang Road Bridge Construction Co. , L td . , Yiyang , Hu. nan 413000, China) Abstract:As an oversize ridge, Maocaojie ridge is located in mucky soft soil layer of Dongting Lake. Based on poor mechanic properties, low earing capacity and difficult construction of the foundation, preparing task and construction scheme were made according to construction conditions. Reverse circulation method with low gear was adopted during construction of large-diameter ored pile which was followed with reverse circulation method to clear ore. Underwater concrete of ored piles were poured y lifting conduit method, while overwater concrete pouring adopted drawing all technique. According to the inspection when construction was finished, all the fifty-four ored piles reach the requirements of design and standard. Key ords: ridge engineering; ored pile; soft soil foundation; construction technology , 1916m,2 @ 1916m , 1831 , 32 , <150cm 28 , <220cm 4 , 72m8m, 30 ,2915~ 36m,