钢管斜桩自平衡法静载试验研究  

Self-balance Static Loading Experiment of Inclined Steel-pipe Pile

作　　者：霍少磊[1] 朱小军[1] 龚维明[1] 

机构地区：[1]东南大学土木工程学院,江苏南京210096

出　　处：《施工技术》2014年第1期23-25,44,共4页Construction Technology

基　　金：国家科技支撑计划(2011BAG07B01);国家自然科学基金(51079030);国家"973"计划(2013CB036304)

摘　　要：根据南京长江夹江跨江步行桥的工程特点,为适应长江中下游冲刷水流的水文条件,确定其基础形式为钢管斜桩,采用打桩船锤击钢管斜桩,完成该步行桥的基础施工。钢管斜桩在目前国内为数不多,与普通钢管桩相比,施工及测试难度较大。为了确定钢管斜桩的承载力,国内首次采用自平衡法对2根钢管斜桩进行现场试验。试验表明,其中1根钢管斜桩承载力不够,使用打桩船对其进行锤击,其后进行第2次自平衡静载试验,试验结果显示承载力满足设计要求。Based on the characteristics of the pedestrian bridge in the Nanjing Jiajiang Yangtze River, to adapt to water scouring hydrologic conditions on the midstream and downstream, inclined steel-pipe pile is determined to be the foundation form and piling barge is adopted to hammer the pile to accomplish the foundation construction of this pedestrian bridge. Inclined steel-pipe pile is rarely used in the current domestic, compared with ordinary steel pipe piles, its construction and testing is more difficult. Self- balance method is used for the first time in China to determine the bearing capacity of the two inclined steel-pipe piles. The tests indicate that one of the two inclined steel-pipe piles＇ bearing capacity is not enough, so piling barge is used to hammer the pile, then the self-balance static loading experiment is used at the second time, the test results show that the bearing capacity meets the design requirements.

关 键 词：桩基础 钢管桩 斜桩 自平衡法 静载试验 

分 类 号：TU753.6[建筑科学—建筑技术科学]