多桩型刚性承台下刚性长短桩复合地基载荷试验分析_周同和.pdf

DOI 10.11779/CJGE201501012 – TU470 A 2015 (1964 ) E-mail zth1964@126.com Bearing capacity tests on multi-type-pile composite foundation with rigid cap 1 1, 2 2 2 ZHOU Tong-he , WANG Fei , ZHAO Hong , GAO Guang-yun (1. Multi-Functional Design and Research Academy of Zhengzhou University, Zhengzhou 450001, China; 2. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China) Abstract: Based on two groups of four-pile field tests on a multi-type-pile composite foundation, the pile-soil stress, load sharing mechanism and its development character of the multi-type-pile composite foundation are analyzed. Based on the test results of horizontal displacement of deep soils in multi-type-pile stress and loading process, the theory of stress diffusion angle of the multi-type-pile composite foundation is discussed. The problems of stress compound method in calculating parameters for the bearing capacity of composite foundations are discussed. This work will contribute to the theoretical and technical development of the composite foundation. Moreover, to solve these problems needs effective tests and filed measurements in the future. Key words: multi-type-pile; composite foundation; bearing capacity; exerting coefficient; ratio of rigidity [1-3]