Abstract：Slurry drilling method is widely employed in pile construction. Sediments at base and clay slurry along hole shaft cannot be avoided in construction procedure with this method. Engineering practice proves that base sediments and slurry can severely reduce the pile’s bearing capacity and increase the settlement of the bored cast-in–situ piles. Based on the results of the field experiments，the bearing features of cast-in-situ bored piles with grouted toe in gravel bearing stratum are analysed. It is pointed out that the friction of cast-in-situ bored piles (lenth/diameter ratio of 54.1～57.1) with grouted toe in gravel bearing stratum is three times of that of the commom bored piles. The settlement of the bored cast-in-situ piles with grouted toe can be largely decreased. Most of deformation of bored cast-in-situ piles with grouted toe is elastic，and residual deformation is quite small. The experiment results can give some references to pile construction and design.
王旭赵善锐丁小军. 砾卵石层中桩底灌浆钻孔灌注桩承载性质研究*[J]. 岩石力学与工程学报, 2003, 22(S2): 2903-2907.
Wang Xu1，Zhao Shanrui2，Ding Xiaojun1. STUDY ON BEHAVIOR OF BORED PILES WITH GROUTED-BASE ON GRAVEL STRATUM. , 2003, 22(S2): 2903-2907.
2003, Vol. 22 
