In-Situ Test Study on Lateral Friction of Screw Pile Composite Foundation of High Speed Railway

被引：0
|
作者：
Ye Y. [1 ]
Cai D. [1 ,2 ]
Chen X. [3 ,4 ]
Yang Y. [3 ]
Chen F. [1 ,2 ]
机构：
[1] China Academy of Railway Sciences Corporation Limited, Beijing
[2] Railway Engineering Research Institute, China Academy of Railway Sciences Corporation Limited, Beijing
[3] School of Civil Engineering, Central South University, Changsha, 410075, Hunan
[4] MOE Key Laboratory of Engineering Structures of Heavy Haul Railway, Central South University, Changsha, 410075, Hunan
来源：
Zhongguo Tiedao Kexue/China Railway Science | 2020年 / 41卷 / 02期
关键词：
High speed railway; In-situ test; Lateral friction of pile; Lateral friction ratio; Load transfer mechanism; Screw pile composite foundation;
D O I：
10.3969/j.issn.1001-4632.2020.02.01
中图分类号：
学科分类号：
摘要：
In-situ tests on the lateral friction of screw pile composite foundation were performed on Tai-Jiao high speed railway in order to investigate the evolution of the lateral friction and load transfer process of screw pile in high speed railway composite foundation by analyzing the obtained static-load and pile top settlement curve of single screw pile and the internal force distribution curve of pile body. Results show that the load transfer process of the pile-soil interface of screw pile can be divided into three stages as elastic stage, elastic-plastic stage and limit state stage. In elastic stage, the lateral friction ratio of screw pile is less than or equal to 0.5. In elastic-plastic stage, the lateral friction ratio of screw pile is 0.5~0.7. In limit state stage, the lateral friction ratio of screw pile is 0.7~1.0. The evolution for the lateral fiction of the straight and threaded sections of screw pile can also be divided into three stages. In elastic stage, the lateral fiction of the threaded section is less than that of the straight section. In elastic-plastic stage, the lateral friction of the threaded section is very close to that of the straight section. In limit state stage, the lateral friction of the threaded section is larger than that of the straight section. © 2020, Editorial Department of China Railway Science. All right reserved.
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页码：1 / 10
页数：9
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