路基填筑运营过程的数值模拟研究

Numerical Simulation Study on Roadbed from Reclamation Stage to Operation Stage

通过对路基从填筑阶段到运营阶段进行动态数值模拟研究，探讨在各个阶段路基的沉降特性及孔压的变化发展规律。计算结果表明，路基沉降主要发生在施工填筑阶段，在路基填筑完成放置5个月后，地表的固结度为96．7％，路基表层的固结度为87．9％，工后沉降满足高速铁路沉降控制要求。超静孔隙水压随着填筑高度的增加而增大，最大孔压发生在填筑期末，随着时间的增加，孔隙水压逐渐消散，最终路基地基达到稳定状态。

Through a dynamic numerical simulation research on roadbed from the reclamation stage to the operation stage,it probed into each stage on roadbed settling qualities and hole pressure change law of development.The computed result indicated that the roadbed subsidence mainly has the construction reclamation stage,the roadbed reclamation lays aside 5 months later,the surface degree of consolidation is 96.7%,the roadbed surface layer's degree of consolidation is 87.9%,after the labor,subsides satisfies the high-speed railroad subsidence control request.The ultra static hole hydraulic pressure highly increases along with the reclamation increases,the biggest hole pressure occurs in the reclamation end of the period.Along with time increase,the hole hydraulic pressure dissipates gradually in embankment laying aside and operation stage,the final roadbed achieves the steady state.