干湿循环荷载作用下土石坝的稳定性

Research on stability of embankment dam under dry-wet cycle loading

土石坝的稳定性对加强水利工程建设管理和工程建设质量控制具有重要意义。为了研究干湿循环荷载作用下土石坝的稳定性,本文利用有限元软件ABAQUS建立土石坝有限元模型,对土石坝进行稳定性分析,了解干湿循环后土石坝变形发展。研究结果表明:1)随着干湿循环次数的增加,土石坝最大位移逐渐增大,同时,随着均质土石坝干湿状态的变化,土石坝坝体出现不同的位移变化带;2)随着干湿循环次数的增加,坝体所受主应力逐渐增大,均质土石坝整体所受应力由上往下逐渐增大,3)最大主应力出现在坝底中心靠上游位置,上游所受应力明显大于下游。

The stability of embankment dam is of great significance to strengthen the management of water conservancy engineering construction and quality control of engineering construction.In order to research the stability of embankment dam under dry-wet cycle loading,the finite element software ABAQUS is used to establish the finite element model of embankment dam,the stability of embankment dam is analyzed,and the deformation development of embankment dam after dry-wet cycle is understood.The results show that:1)With the increase of the number of dry and wet cycle,the maximum displacement of the embankment dam gradually increases,and at the same time,with the change of the dry and wet state of the homogeneous embankment dam,different displacement change zones appear in the embankment dam body.2)With the increase of the number of dry and wet cycle,the main stress of the dam body gradually increases,and the stress of the whole homogeneous embankment dam gradually increases from top to bottom.3)The maximum principal stress occurs in the upstream position of the center of the dam bottom,and the upstream stress is significantly greater than the downstream stress.The results can provide a certain reference for normal construction and safe use of embankment dam.