水泥固化土海堤渗流流固耦合效应分析

摘要

土石海堤作为一种传统的堤防形式广泛运用于水运工程中,但由于土石海堤自身的局限性,及其修建时的施工缺陷、运行不当,往往存在渗透破坏等严重的安全性问题,严重威胁建筑物的安全运行.针对已有工程,提出一种新型的水泥固化土海堤防渗结构形式,利用有限元软件ADINA,采用摩尔-库仑和Druker-Prager弹塑性本构模型,对普通土石海堤与水泥固化土海堤不同堤坡相同工况下流固耦合效应应力场、渗流场与应变场进行数值模拟分析.结果表明:使用水泥固化土不仅减少海堤内、外堤坡比,节约土地资源,而且降低整个工程的工程投资,是一种简捷、可靠的方法.%Earth-rock seawall as a kind of traditional embankment type is widely used in port and waterway engineering.Because of the limitations on earth-rock seawall,its building construction defects and improper operation make it tend to have serious security problems such as seepage failure and a serious threat to the safety of buildings.In view of the existing engineering,this paper puts forward a new type of cement stabilized soil dikes seepage control structure,uses the finite element software ADINA,adopts Moore-Coulomb and Druker-Prager elastic-plastic constitutive model,and analyzes the average earth-rock seawall and cement solidified soil with different seawall embankment slopes the same dirty effect of fluid-solid coupling seepage field and stress field,strain field by numerical simulation.The results show that the cement stabilized soil can reduce the seawall,inside and outside embankment slope gradient to save the land resources,and save the whole of the engineering project investment.It is a kind of simple and reliable method.