Consolidation characteristics and influencing factors of rigid pile-raft foundation of high-speed railway

被引：0
|
作者：
Shang Y.-H. [1 ,2 ]
Xu L.-R. [1 ,3 ]
Chen Z.-F. [2 ]
机构：
[1] School of Civil Engineering, Central South University, Changsha
[2] Institute of Architecture and Engineering, Huanghuai University, Zhumadian
[3] National Engineering Laboratory for High Speed Railway Construction, Central South University, Changsha
来源：
Jilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (Engineering and Technology Edition) | 2022年 / 52卷 / 07期
关键词：
consolidation characteristics; high speed railway; influencing factors; pile-raft composite foundation;
D O I：
10.13229/j.cnki.jdxbgxb20210143
中图分类号：
学科分类号：
摘要：
The typical unit of PHC rigid pile-raft composite foundation in high-speed railway is selected. Considering the undrained objective characteristics of rigid pile，the consolidation equations of soil in reinforcement area and underlying layer are established respectively，and the influence of foundation design parameters on consolidation characteristics is revealed in depth combining with examples. The results show that the consolidation of rigid pile-raft composite foundation has a time-varying effect. The filling period is mainly affected by the consolidation rate of the reinforcement area，and the resting period is mainly affected by the consolidation rate of the underlying layer. Design parameters such as replacement rate，relative reinforcement depth and pile-soil compression modulus ratio all have an impact on the consolidation rate of composite foundations，and the critical ranges are 0.03-0.06，0.5-0.8 and 100-150，respectively. The rationality of the algorithm in this paper has been verified，and the research results can provide a theoretical basis for the design of rigid pile-raft composite foundations for high-speed railways in soft soil areas. © 2022 Editorial Board of Jilin University. All rights reserved.
引用
收藏
页码：1588 / 1597
页数：9
相关论文
共 20 条
  • [1] Jiang Guan-lu, Weri-zi Chen, Liu Xian-feng, Et al., Field study on swelling-shrinkage response of an expansive soil foundation under high-speed railway embankment loads[J], Soils and Foundations, 58, 6, pp. 1538-1552, (2018)
  • [2] Kong Ling-wei, Zeng Zhi-xiong, Bai Wei, Et al., Engineering geological properties of weathered swelling mudstones and their effects on the landslides occurrence in the Yanji section of the Jilin-hunchun high-speed railway, Bulletin of Engineering Geology and the Environment, 77, 4, pp. 1491-1503, (2017)
  • [3] Sun Gang-qiang, Sun Guang-chao, Liu Han-long, Et al., Experimental study of XCC pile-raft composite foundation under different excitation frequencies, Rock and Soil Mechanics, 38, 5, pp. 1379-1384, (2017)
  • [4] Zuo Shen, Wang Min, Xu Lin-rong, Et al., Research on reinforce effect of high-speed railway low and medium compressible soil pile-raft (net) foundation, Journal of Central South University(Science and Technology), 45, 5, pp. 1590-1597, (2014)
  • [5] Chen Hong-yun, Ma Jian-lin, Chen Hong-mei, Et al., Theoretical and experimental studies on forces acting on raft of pile-raft composite foundation, Chinese Journal of Geotechnical Engineering, 36, 4, pp. 646-653, (2014)
  • [6] Wu Hui, Hu Li-ming, Wen Qing-bo, Numerical simulation of electro-osmotic consolidation coupling non-linear variation of soil parameters, Computers and Geosciences, 103, 6, pp. 92-98, (2017)
  • [7] Zhang Feng, Liu Ying, Xu Zhao-yi, Et al., Factors influencing subgrade post-construction settlement of CFG pile composite foundation in Wuhan-Guangzhou high-speed railway, Journal of Southwest Jiaotong University, 50, 5, pp. 783-788, (2015)
  • [8] Cai Yu, Xu Lin-rong, Zhong Qi-rong, Et al., Decision-making model of highway soft foundation processing based on similar spider web structure, Control and Decision, 35, 2, pp. 445-452, (2020)
  • [9] Ma Ming-zheng, Hai Zhen-xiong, Ye Yang-sheng, Et al., Applicable method for settlement calculation of CFG pile composite foundation for high-speed railway, China Railway Science, 2, pp. 7-13, (2014)
  • [10] Wang Peng, Han Yan-bing, Zhou Yang, Et al., Apparent clogging effect in vacuum-induced consolidation of dredged soil with prefabricated vertical drains, Geotextiles and Geomembranes, 48, 4, pp. 524-531, (2020)
12