土工格栅加筋与排水板联合处理软土地基的弹塑性有限元分析研究

Elasto-plastic Finite Element Analysis of Geogrid Reinforced and Plastic Board-Drained Foundation

根据岩土工程的比奥固结理论,采用弹塑性有限元方法分析研究了塑料排水板和土工格栅加筋加固软土地基的效果和机理。分析结果表明,加筋结合排水板处理软土路基能够加速路基的固结,缩短软土层的压缩排水时间,提高路基的抗剪强度,减少路堤的沉降、不均匀沉降和侧向位移,提高路堤的整体稳定性。二者相互配合,可大大缩短工期。

The effectiveness and mechanism of soft soil foundation treatment with geogrid reinforced and plastic board-drained foundation are analyzed by employing the PLAXIS software in combination with Biot's consolidation theory. The results show that the geogrid reinforcement cooperated by plastic drain boards can quicken the consolidation rate of soft soil foundation, increase the shearing strength of soft soil, reduce the embankment's settlement, uneven settlement and horizontal displacement. Therefore, the treatment technique can improve the integrated stability of embankment and greatly shorten the construction period.