Uplift behavior and load transfer mechanism of prestressed high-strength concrete piles

作     者：赖颖 金国芳 

作者机构：College of Civil EngineeringTongji University 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2010年第17卷第1期

页      面：136-141页

核心收录：

学科分类：081401[工学-岩土工程] 08[工学] 0814[工学-土木工程] 

基　　金：Project(50621062) supported by the National Natural Science Foundation of China 

主　　题：prestresed high-strength concrete piles full-scale test uplift capacity load transfer mechanism 

摘      要：Prestressed high-strength-concrete (PHC) tube-shaped pile is one of the recently used foundations for soft soil. The research on uplift resistance of PHC pile is helpful to the design of pile foundations. A field-scale test program was conducted to study the uplift behavior and load transfer mechanism of PHC piles in soft soil. The pullout load tests were divided into two groups with different diameters, and there were three piles in each group. A detailed discussion of the axial load transfer and pile skin resistance distribution was also included. It is found from the tests that the uplift capacity increases with increasing the diameter of pile. When the diameter of piles increases from 500 to 600 mm, the uplift load is increased by 51.2%. According to the load-displacement (Q-S) curves, all the piles do not reach the ultimate state at the maximum load. The experimental results show that the piles still have uplift bearing capacity.