软土地基筑坝固结变形分析

为研究利用塑料排水板处理的深厚淤泥质软土地基在筑坝过程中的固结变形行为，利用修正剑桥模型结合Biot固结理论，建立软土地基上分层填筑过程中的有限元分析模型，计算出坝体和地基的沉降、水平位移以及孔隙水压力分布情况。将计算结果与现场实测数据进行对比，得出：坝体上游最大水平位移接近0.28 m,实测该断面上游最大水平位移为0.25 m；监测管位置计算出的竖向沉降最大值在1.8 m左右，实际沉降管测得的沉降值为1.76 m。计算结果与实际数据较为吻合，计算误差在合理范围内。并在此基础上分析了坝基和坝体固结变形分布特征和超孔隙水压力消散的情况，为本工程和其他类似工程的安全建设和稳定运行提供了理论依据和切实可行的分析方法。

Deformation and Consolidation Analysis of Dam Established on Soft Soil Foundation

For researching the deformation and consolidation of dam established on deep and thick silt soft soil foundation treated by plastic draining plate,and with the use of the modified Cambridge model based on Biot consolidation theory,the fi-nite element analysis model soft soil foundation was established to calculate out the distribution of the dam and foundation set-tlement,horizontal displacement and pore water pressure.Comparing the calculated results with measured data,the conclusion is that the maximum horizontal displacement of the upper reaches of the dam is close to 0.28 m,the maximum horizontal dis-placement of the upper section is 0.25 m.The maximum value of the vertical settlement at the monitoring position is calculated at about 1 .8 m,and the measured settlement value is 1 .76 m.Therefore,the calculated results are in good agreement with the actual data.The error lies in the acceptable range.Then,based on this,the distribution characteristics of the consolidation de-formation and the dissipation of pore water pressure are analyzed.It provides the theoretical basis and practical analysis method for the safe construction and stable operation of the project and other similar projects.