塑料排水板处理唐曹铁路软基数值模拟分析

Numerical Simulation on Soft Foundation of Tangshan-Caofeidian Railway Treated by Plastic Drainage Board

以唐山至曹妃甸的铁路工程为依托,运用ABAQUS对其进行数值模拟,研究排水板在固结沉降中的作用,并分析了排水板长度和间距对土体的固结沉降影响。结果表明:ABAQUS所得的模拟值能够与实际值较好吻合;排水板能够缩短排水通道,加快超孔隙水压力的消散;长短板交替式真空预压法能够较好地加固地基土。在此基础上对实际工程排水板长度和间距进行了优化。

Based on the railway engineering from Tangshan to Caofeidian,numerical simulation with effect of drainage board on consolidation settlement was carried out with ABAQUS.Moreover,how its length and spacing affect the consolidation settlement of soil mass was analyzed.The results show that the ABAQUS simulation values are consistent with the actual values;the use of drainage board may shorten the drainage channel and accelerate the dissipation of excess pore water pressure;the foundation soil may be consolidated by alternative vacuum preloading with long and short plates.On this basis,it's optimized for the practical engineering of drainage board's length and spacing.