长江河道堤防裂缝成因分析与处理方法  

Analysis of causes and treatment methods for cracks in the Yangtze River Embankment

作　　者：薛子龙 万景红 马雨衍 朱震东 姚璐 XUE Zilong;WAN Jinghong;MA Yuyan;ZHU Zhendong;YAO Lu(Nanjing Yangtze River Administration Office,Nanjing 210011,China;General Irrigation Canal Management Office of Jiangsu Province,Huai’an 223200,China)

机构地区：[1]南京市长江河道管理处,江苏南京210011 [2]江苏省灌溉总渠管理处,江苏淮安223200

出　　处：《江苏水利》2024年第9期69-72,共4页Jiangsu Water Resources

基　　金：南京市水务科技项目(202301)。

摘　　要：长江堤防南京段路面裂缝主要呈现为横向裂缝与纵向裂缝,横缝长度、缝宽、深度总体上均小于纵缝,横缝主要由地基不均匀沉降及温度应力引起,纵缝主要由滑坡及重物荷载引起。土壤自重应力、剪切应力、温度应力均能引起堤防裂缝,其中剪切应力是造成堤防裂缝的最主要形式,由于土壤存在内摩擦角φ,土体剪切破坏时的破裂面与大主应力作用面的角度呈45°+φ/2。缝隙灌浆、护坡加固与开挖回填是处理堤防路面裂缝的有效措施,能够减小土壤颗粒之间的缝隙,增加堤防的整体强度和稳定性,提高堤防的整体安全性能。The road surface cracks in the Nanjing section of the Yangtze River embankment mainly present as transverse cracks and longitudinal cracks.The length,width,and depth of the transverse joints are generally smaller than those of the longitudinal joints.The transverse joints are mainly caused by uneven settlement of the foundation and temperature stress,while the longitudinal joints are mainly caused by landslides and heavy loads.Soil self weight stress,shear stress,and temperature stress can cause cracks in embankments,among which shear stress is the most common form of crack formation.Due to the presence of internal friction angleφin the soil,the angle between the fracture surface and the large principal stress action surface during soil shear failure is 45°+φ/2.Gap grouting,slope reinforcement,and excavation backfilling are effective measures for dealing with cracks in embankment pavement,which can reduce the gaps between soil particles,increase the overall strength and stability of the embankment,and improve the overall safety performance of the embankment.

关 键 词：长江堤防 横向裂缝 纵向裂缝 剪切应力 内摩擦角 

分 类 号：TV871[水利工程—水利水电工程]