加筋土结构失稳模式与致灾原因探讨  

Research on instability mode and causes of disasters of reinforced soil structure

作　　者：徐洪路 蔡晓光 王海云[1] 李思汉 肖成志 XU Honglu;CAI Xiaoguang;WANG Haiyun;LI Sihan;XIAO Chengzhi(Key Laboratory of Earthquake Engineering and Engineering Vibration,Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,China;China Earthquake Disaster Prevention Center,Beijing 100029,China;Langfang City Key Laboratory of Research and Application of Geosynthetic Reinforced Soil Structure,Sanhe 065201,China;College of Geological Engineering,Institute of Disaster Prevention,Sanhe 065201,China;School of Civil and Transportation Engineering,Hebei University of Technology,Tianjin 300401,China)

机构地区：[1]中国地震局工程力学研究所地震工程与工程振动重点实验室,黑龙江哈尔滨150080 [2]中国地震灾害防御中心,北京100029 [3]廊坊市加筋土结构研发与应用重点实验室,河北三河065201 [4]防灾科技学院地质工程学院,河北三河065201 [5]河北工业大学土木与交通学院,天津300401

出　　处：《自然灾害学报》2025年第1期203-216,共14页Journal of Natural Disasters

基　　金：地震科技星火项目(XH23067YA);国家自然科学基金联合基金项目(U2139207)。

摘　　要：加筋土结构作为一种新型岩土工程构筑物,在公路、铁路等交通基础设施中的应用逐渐广泛。因设计、施工不当等原因,加筋土结构易产生变形,严重时甚至坍塌,因此有必要探讨结构破坏特性、分析失效原因,以供工程界参考。文中收集了146个加筋土结构破坏案例,统计分析了结构类型、面板类型、筋材类型、填料类型、结构高度、加筋级数和结构用途等结构特性。总结归纳了结构坍塌、面板变形、顶部沉降、地基承载失效和筋材断裂等常见失稳现象。剖析了设计、施工、材料、降雨、地震和使用不当等致灾原因,以期厘清加筋土结构失效的关键因素。提出了相应改善对策以提高工程质量。研究结果表明:加筋土结构的破坏为综合性破坏,面板变形、顶部沉降和地基破坏为最常见的3种原生破坏模式,原生破坏模式会逐渐转化为其它次生破坏模式;降雨、地震和使用不当为导致结构破坏的主要外部因素,施工、设计和材料选用不当为导致结构破坏的主要内部因素。建议选用抗剪切刚度较大的面板形式以增强结构的抗变形能力;严格遵循规范条文对结构进行分级设计和材料选取以提升结构的稳定性;针对降雨和地震等自然灾害,应加强针对性设计,并辅以数值模拟的手段进行性能评估。Reinforced soil structure is gradually used in transportation infrastructure such as highways and railways as a new type of geotechnical engineering structure.Due to its structural characteristics,the reinforced soil structure is prone to deformation and even collapse in severe cases,so it is necessary to study the damage characteristics and analyze the failure reasons for the reference of the engineering community.In this paper,146 failed reinforced soil structures were collected and statistically analyzed for structural characteristics such as structure type,panel type,reinforcement type,filler type,structure height,structure tier,and functional use.Common failure phenomena such as structure collapse,panel deformation,settlement,foundation bearing failure,and reinforcement fracture were qualitatively summarized.Causes of failure such as design,construction,materials,rainfall,earthquakes,and overload were analyzed in order to clarify the key factors for failure of reinforced soil structures.Corresponding improvement countermeasures were proposed to improve the engineering quality.Based on the research results,this paper has drawn the following main conclusions:the destruction of reinforced soil structure is comprehensive destruction,panel deformation,top settlement and foundation failure are the three most common primary failure modes,and the primary failure mode will gradually transform into other secondary failure modes.Rainfall,earthquake and improper use are the main external factors leading to structural damage,and improper construction,design and material selection are the main internal factors leading to structural damage.This paper suggests select panels with large shear stiffness to enhance the deformation resistance of the structure;strictly follow the provisions of the code to carry out graded design and material selection of the structure to improve the stability of the structure;for natural disasters such as rainfall and earthquakes,targeted design should be strengthened,and performance should be ev

关 键 词：加筋土结构 边坡加固 破坏现象 致灾原因 统计分析 

分 类 号：TU476.4[建筑科学—结构工程]