【摘要】 结合南通长江堤防渗透试验数据,利用Plaxis岩土工程专用有限元软件对南通市长江堤防典型地段分别进行不同潮位及设计水位条件下的非稳定渗流数值模拟。模拟结果表明,在已监测江水位条件下堤体渗透基本不受外江水位变化的影响;设计水位条件下的各地段江堤稳定安全系数都在1.5以上;对各典型潮位下各监测断面水位的模拟结果与其实测结果具有良好的一致性。南通市长江堤防渗流稳定安全性能优良。应用实际表明,Plaxis软件具有良好的实用性能,适合用于堤防渗流稳定安全评估。更多还原

【Abstract】 In connection with in situ seepage experiments of dikes of the Yangtse River, unsteady seepagethrough dikes was numerically simulated using Plaxis (a commercial geotechnical engineering software) atdifferent tide levels and designed water table. The results showed that seepage through dikes would be es-sentially not influenced by variation in river water table, the calculated safety factors of all measured crosssections were larger than 1. 5, and the simulated water tables of different monitoring points were almostthe same as measured values. Thus conclusions can be drawn that Yangtse River dikes within Nantonghave good seepage stability, and Plaxis proves to be effective for dike seepage safety assessment.更多还原