Theoretical Analysis of a Long-term Settlement of a Driven Pile Considering Rheological Effects of the Surrounding Soil

被引：0

作者：

Li J.-P. ^{[1
,2
]}

Cao W.-J. ^{[1
,2
]}

Wang H. ^{[1
,2
]}

Chen H.-H. ^{[3
]}

机构：

[1] Key Laboratory of Geotechnical and Underground Engineering, Ministry of Education, Tongji University, Shanghai

[2] Department of Geotechnical Engineering, Tongji University, Shanghai

[3] Department of Civil and Architectural Engineering and Mechanics, University of Arizona, Tucson, AZ85721, AZ

来源：

Zhongguo Gonglu Xuebao/China Journal of Highway and Transport | 2023年 / 36卷 / 10期

基金：

中国国家自然科学基金;

关键词：

clay strata; compression rheology of pile tip; load transfer Received 28 July 2022; long-term settlement; shear rheology of pile side; subgradc engineering;

D O I：

10.19721/j.cnki.1001-7372.2023.10.009

中图分类号：

学科分类号：

摘要：

between pile and soil. Thus, a theoretical method considering the rheological effects of surrounding soil was proposed for calculating the long-term displacement of the driven pile. The proposed method was verified by performing a comparison with the field results of the two driven piles remaining under a sustained load for 29. 4 years. Then, based on the proposed method, the influence of shear rheology rate, relevant influencing factors, and loading level on the long-term settlement of the driven pile were further analyzed. The results suggest that the rheological effect of the surrounding soil is significant during the initial stage of sustained loading; the pile deformation rate is high at first then gradually decreases with time. The pile settlement caused by rheological properties of the surrounding soil accounts for a significant proportion of the total settlement of clay strata, which is approximately 50 %. Additionally, the long-term settlement increases with higher shear rheology rate and higher loading level.; The effect of the long-term settlement of a driven pile under sustained loading, which depends on the rheological properties of soils and clays, is of critical importance for the safety of a superstructure during its service. Based on the equivalent time-line shear rhcology model and Yin-Graham compression rheology model, the mechanisms of soil rheology at pile shaft and base were investigated by considering the actual stress state of soil around the driven pile under a load condition. Furthermore, considering the pile installation effect, initial settlement and the proposed soil rheology mechanisms, as well as the loading response and rheology of clay, the extended load transfer function was established. Based on the proposed extended load transfer function, the load transfer method was further modified by considering the compatible deformation © 2023 Xi'an Highway University. All rights reserved.

引用

页码：95 / 105

页数：10

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