市政技术2026，Vol.44Issue(9)：122-131,10.DOI:10.19922/j.1009-7767.2026.09.122
堆载速率对路基及其周边环境影响分析研究
Study on the Influence of Preloading Rate on Subgrade and Surrounding Environment
刘越 1郭艳鹏 2邱龙 3谢伟 1刘依文 4洪旭5
作者信息
- 1. 中铁五局(珠海)工程有限责任公司,广东珠海 519090
- 2. 中山大学地球科学与工程学院,广东珠海 519080
- 3. 珠海联港城市建设管理有限公司,广东珠海 519090
- 4. 珠海市中宏鼎立科技有限公司,广东珠海 519175
- 5. 中铁五局集团第五工程有限责任公司,湖南郴州 423000
- 折叠
摘要
Abstract
To clarify the comprehensive effect and action mechanism of preloading rate for soft soil foundations on subgrade and its surrounding environment,this paper takes the soft soil foundation preloading project of Jingang Avenue in Jinwan District,Zhuhai City as the engineering background.The finite element numerical simulation method is adopted.Multiple working conditions are designed by varying the loading duration of each preloading stage to control the preloading rate.The distribution characteristics of soil displacement field,pore water pressure field and stress field during preloading are systematically analyzed,and the regulatory mechanism of preloading rate governing the evolution of subgrade and surrounding environment is investigated.The results demonstrate that the effect of preloading rate features remarkable stage-dependent properties,and the significant influence zone lies within approximately 10.0 m from the preloading boundary.A low preloading rate imposes minor impacts on the final deformation of adjacent transmission towers,whereas the extended deformation duration may trigger indicator over-limit risks.Despite shortening the construction schedule,rapid preloading substantially amplifies plastic deforma-tion of soils near the preloading edge;its maximum horizontal displacement and maximum outer ground heave are 34％and 61％greater than those under slow preloading,respectively.Excessively rapid preloading causes a sharp rise in excess pore water pressure in soft soils and delayed growth of effective stress.In contrast,slow preloading fa-vors pore water pressure dissipation and synchronous stress development,achieving superior controllability of struc-tural deformation.The outcomes can offer technical references for construction rate control of preloading works on soft soil subgrades.关键词
堆载速率/堆载预压/数值模拟/路基变形/影响机制Key words
preloading rate/preloading/numerical simulation/subgrade deformation/influence mechanism分类
交通工程引用本文复制引用
刘越,郭艳鹏,邱龙,谢伟,刘依文,洪旭..堆载速率对路基及其周边环境影响分析研究[J].市政技术,2026,44(9):122-131,10.
