塑料排水板地基的三维数值分析

摘要

目前塑料排水板地基的三维数值分析较为少见,考虑地基土的成层性和塑料排水板渗透系数的各向异性,建立了塑料排水板的三维地基模型,计算结果表明,塑料排水板加快了地基沉降的发展速率.之后建立了天然地基的三维模型,变化处理区土体的渗透系数来接近考虑塑料排水板的沉降计算结果,得到的等效渗透系数为原值的16.5倍,可见塑料排水板显著提高了原地基的渗透性.%At present,3-D numerical analysis of ground with plastic drainage plates is rare.Considering the layered property of ground and the anisotropy of permeability in plastic drainage plates,a 3-D model of ground with plastic drainage plates is established.According to the calculation results,plastic drainage plates accelerate the development of settlement.Afterwards,a 3-D model of natural ground is established and the permeability coefficient in the treated area is changed to approach the settlement calculation result of the model considering plastic drainage plates.It can be found that the equivalent permeability coefficient is 16.5 times of the original value.It is obvious that the permeability of the original ground can be evidently improved by using plastic drainage plates.