桥梁地下结构对堤防渗流分布规律的影响分析

当建设跨越河流的设施时,建设在堤防附近的设施基础会对堤防渗流场的分布规律产生影响.为了确保堤防稳定性及长期安全运行,有必要对建设设施基础前、后堤防的渗流场进行分析.采用三维有限元数值模拟方法对某堤防建设大桥基础前、后进行了稳定-非稳定渗流有限元分析,计算结果表明:桥梁基础对渗流场的影响不大,堤身渗流逸出点的渗透坡降变化很小,各个土层的渗透坡降变化相差不超过4%,建设桥梁不会显著影响堤防的渗流稳定性.

Analysis of Seepage while Building Underground Structures of Bridge Nearby Embankment

The seepage field and motion characteristics may be changed due to piers built in embankments in the project of highway bridge across a river;thus affecting the penetration of seepage of the embankment.Therefore,three-dimensional finite element simulations of the embankments with pier construction and no pier construction are carried out and analyzed in order to ensure the stability of the initial project and long-term safe operation.The results show that the piers have little effect on the seepage field.The seepage gradient in seepage points varies indistinctively;and there is little change in the penetration of the various soil infiltration gradient,no more than 4%,between before and after the construction of piers.Then construction of piers can meet the seepage stability requirements.