Analysis on the load transfer function of post-grouting bored pile based on self-balanced method
Wan Zhihui1,2 Dai Guoliang1,2 Gong Weiming1,2 Chen Haijun3 Chen Xiangyang3
1. Key of Laboratory for RC and PRC Structure of the Ministry of Education, Southeast University, Nanjing 210096, China;
2. School of Civil Engineering, Southeast University, Nanjing 210096, China;
3. Zhejiang Provincial Institute of Communications Planning, Design & Research, Hangzhou 310006, China
Abstract：Based on the data analysis of self-balanced pile testing in the actual projects, this work presents different load transfer function models for upper and lower pile sections before and after grouting according to characteristics of self-balanced testing technology. Furthermore, the Mindlin displacement solution mixed with load transfer method is used to consider the influence of soil continuity and analyze the bearing characteristics. Finally, a case study is performed to demonstrate the validity of the proposed models. The results indicate that these proposed load transfer function models are correct and reasonable, and the model of post-grouting pile is more consistent with the actual engineering. Moreover, the comparison also implies that the soil continuity of super-long pile has a significant influence on bearing capacity and settlement. Compared with the case of ignoring soil continuity, the displacement of pile head will be larger and safer when considering the soil continuity effect.
万志辉 戴国亮 龚维明 陈海君 陈向阳. 基于自平衡法后压浆灌注桩荷载传递函数的变化分析[J]. 土木工程学报, 2017, 50(8): 98-104.
Wan Zhihui Dai Guoliang Gong Weiming Chen Haijun Chen Xiangyang. Analysis on the load transfer function of post-grouting bored pile based on self-balanced method. 土木工程学报, 2017, 50(8): 98-104.
