长江科学院院报2017，Vol.34Issue(12)：73-77,83,6.DOI:10.11988/ckyyb.20160904
南宁软岩地基大直径灌注桩极限承载力预测
Prediction of Ultimate Bearing Capacity of Bored Pile of Large Diameter in Soft Rock Foundation in Nanning
摘要
Abstract
The bearing capacity of cast-in-place bored pile of large diameter in soft rock foundation in Nanning is difficult to determine due to softening and disintegration characteristics when soaked in water.Static load test was conducted to determine the bearing capacity of bored pile in the soft rock interbedding foundation of an elevated platform project in the railway station of Nanning Ciy.Both exponential function fitting method and numerical back analysis were used to accurately predict the load-settlement relation and ultimate bearing capacity of test pile which did not reach the ultimate state.Results show that the load-settlement curve of bored pile in soft rock interbedding foundation is an adjustment curve and the pile works as end bearing friction pile.As common design methods of pile foundation at present underestimates the bearing capacity of pile in this foundation,exponential function which is used to describe the load-settlement behaviour of test pile and numerical back analysis can be combined to estimate the ultimate bearing capacity of test pile.关键词
灌注桩/静载试验/极限承载力预测/指数模型/数值反演分析Key words
bored pile/static load test/prediction of ultimate bearing capacity/exponential model/numerical back analysis分类
建筑与水利引用本文复制引用
江杰,陈骏,肖萌,韦永超,马少坤..南宁软岩地基大直径灌注桩极限承载力预测[J].长江科学院院报,2017,34(12):73-77,83,6.基金项目
国家自然科学基金项目(51568006,41362016) （51568006,41362016）
中国博士后科学基金项目(2017M612865) （2017M612865）
广西重点实验室系统性研究项目(2016ZDX11) （2016ZDX11）
广西岩土力学与工程重点实验室资助课题(14-KF-03,13-KF-02) （14-KF-03,13-KF-02）
广西博士后专项资助项目 （）
