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- Title
格栅强度对桩-网复合地基桩-土应力比影响研究.
- Authors
商拥辉; 徐林荣; 商丽; 方前程; 赵莹
- Abstract
This paper aims to explore the effects of different grille intensities to the variation of pile-soil stress ratio of pile-net composite foundations. On the basis of pile-net composite working mechanism foundation, it derives analytically the pile-soil stress ratio. Then it takes the net composite foundation of Ganlong (Ganzhou-Longyan) and Harbin-Dalian (Harbin-Dalian) high-speed rail piles as an engineering examples. It carries out a comparative analysis of the measured data from the pile under the grille strength 100kN·m-1 and 300kN·m-1 conditions to understand the pile-soil stress ratio variation. Finally it establishes a three-dimensional numerical model and further analyses the pile-soil stress ratio variation for the grid strength between 100kN·m-1~400kN·m-1. The results show that:as the grid strength increases from 100kN·m-1 to 300kN·m-1, the pile-soil stress ratio increased considerably. When the grid intensity exceeds 300kN·m-1, the pile-soil stress ratio increases to a lesser extent. By considering the characteristics of the greatest contribution composite foundation bearing, it is recommended to select the grid strength 200kN·m-1~300kN·m-1. Under this condition, the pile-soil stress ratio is from 3.8 to 4.5.
- Subjects
PILES &; pile driving; HIGH speed trains; GRILLES (Architecture); COMPARATIVE studies; SPEED of railroad trains
- Publication
Journal of Engineering Geology / Gongcheng Dizhi Xuebao, 2017, Vol 25, Issue 1, p95
- ISSN
1004-9665
- Publication type
Article
- DOI
10.13544/j.cnki.jeg.2017.01.013