%0 Journal Article
%A JIANG Jie
%A CHEN Jun
%A XIAO Meng
%A WEI Yong-chao
%A MA Shao-kun
%T Prediction of Ultimate Bearing Capacity of Bored Pile of LargeDiameter in Soft Rock Foundation in Nanning
%D 2017
%R 10.11988/ckyyb.20160904
%J Journal of Yangtze River Scientific Research Institute
%P 73-77
%V 34
%N 12
%X 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.
%U http://ckyyb.crsri.cn/EN/10.11988/ckyyb.20160904