水文地质工程地质2025，Vol.52Issue(2)：85-93,9.DOI:10.16030/j.cnki.issn.1000-3665.202404058
钢架-土工材料系统预加固流塑土力学机理及参数敏感性分析
Mechanical mechanism and parameters sensitivity analysis of the steel frame-geotextile system for the pre-reinforcement of flow plastic soil
摘要
Abstract
In reclamation projects for port construction,the pre-reinforcement of flow plastic fill soils is critical for promoting deep drainage consolidation and enhancing subgrade bearing capacity.To address the limitations of high-cost and low-efficiency in conventional earth fill methods,this study proposes a"steel frame-geotextile system"pre-reinforcement technology,distinguished by its high efficiency,cost-effectiveness,and material recyclability.This paper explored the mechanical mechanism of the proposed technology,introducing key physical-mechanical parameters to refine the bearing capacity formula.It elucidated the sensitivity relationship between the pre-reinforcement ultimate bearing capacity and geosynthetic parameters,and explored the scientific validity of this pre-reinforcement method.The results demonstrate that the dual foundation structure with a high modulus ratio effectively distributes the overburden load,reducing the additional stress in flowable fill soils.Geotextile,under loading,deforms and generates frictional resistance and anchoring effect,enhancing the load-bearing capacity of flow plastic soils.The pre-reinforcement effectiveness is linearly proportional to the geotextile's equivalent tensile strength and exponentially inversely related to the ultimate strain,with the former exerting a more significant influence.In engineering practice,materials with slightly higher tensile strength should be selected to withstand construction disturbances and prevent pre-reinforcement failure.In the context of the engineering example provided in this study,it is shown that if the conventional earth fill method was used to achieve the same reinforcement efficacy,the required earth fill layer thickness would need to be at least 9.13 m.This highlights the superior efficiency and vast potential for wider application of the proposed method.This study offers both a practical scheme and theoretical guidance for pre-reinforcement in the construction of flow plastic soils for drainage plates.关键词
流塑土/钢架-土工材料系统/预加固/极限承载力/抗拉强度Key words
flow plastic soil/steel frame-geotextile system/pre-reinforcement/ultimate bearing capacity/tensile strength分类
土木建筑引用本文复制引用
汤连生,杜继杰,黄家宁,陈洋,程子华,丁威涯..钢架-土工材料系统预加固流塑土力学机理及参数敏感性分析[J].水文地质工程地质,2025,52(2):85-93,9.基金项目
国家自然科学基金项目(42277142) （42277142）
广州理工学院专项基金资助国家级培育项目(2024gjp002) （2024gjp002）
广州理工学院科研启动经费项目(2023KYQ028) （2023KYQ028）
