大直径长钢护筒陆地施工方案比选  

Scheme Comparison for Construction of Large Diameter and Long Steel Casings on Land

作　　者：张立奎[1] 米长江[2] 欧阳祖亮[2] 鲜亮[2] 

机构地区：[1]安徽省高速公路总公司,安徽合肥230051 [2]中交第二公路工程局有限公司,陕西西安710065

出　　处：《桥梁建设》2009年第A01期70-72,共3页Bridge Construction

摘　　要：马鞍山长江公路大桥悬索桥南边塔位于浅滩区,桩基采用54根φ2.5 m钻孔灌注桩,其永久钢护筒外径2.8 m,壁厚22 mm,长16.2 m,临时钢护筒长9 m,壁厚14 mm。钢护筒采用先钻孔后振动下沉的施工工艺。振沉效果良好。The south tower of the suspension bridge of Maanshan Changjiang River Highway Bridge is located in the shoal area and the foundation for the tower is composed of totally 55 numbers of φ2.5 m bored piles. The external diameter of the permanent steel casing used for each of the bored piles is 2.8 m, the wall thickness of the casing is 22 mm and the length is 16.2 m while the length of the temporary casing for the pile is 9 m and the wall thickness is 14 mm. The construction technology for the casing is to first bore the hole in the ground and then to sink the casing down by vibrating. The effect of sinking of the casing by vibrating is satisfactory.

关 键 词：马鞍山长江公路大桥 钻孔灌注桩 钢护筒 施工 方案比选 

分 类 号：U445.551[建筑科学—桥梁与隧道工程] U231.3[交通运输工程—道路与铁道工程]