土木工程与管理学报2018，Vol.35Issue(1)：110-116,7.
塑料排水板处理超软土地基的数值模拟分析
Numerical Simulation Analysis of Plastic Drainage Plate to Treat Super-soft Ground
摘要
Abstract
Using the method of prefabricated vertical drains with preloading for soft foundation treatment can accelerate the drainage consolidation of the ground in super-soft soil area with high water content,high compressibility and low bearing capacity. In this paper,aiming at the example of a super-soft soil foundation engineering in Xiapu tidal flat,the plastic drainage plate was simplified by the drainage line and Chai's two-dimensional equivalent method respectively, and the corresponding numerical simulation analysis was carried out in PLAXIS 2D finite element software. By analyzing the calculation results of the two simplified models of plastic drainage plate compared with the measured data,the following conclusions can be drawn: (1) the surface settlement, deep settlement, deep horizontal displacement and excess pore water pressure of the subgrade were in agreement with the measured data, and the deviation was within the allowable range. (2) the calculation result of the equivalent permeability coefficient method was reliable by comparing the two simplified models, so Chai's two-dimensional equivalent method can be extended to other finite element analysis of prefabricated vertical drains with preloading method, making up for the limitation of simplified analysis of plastic drainage plate by using the similar finite element software. (3) By using PLAXIS software,it is found that the method reduces the calculation complexity of the traditional consolidation theory for prefabricated vertical drain and has certain applicability, which can be used to guide the similar engineering design and construction.关键词
塑料排水板/超软土地基/等效渗透系数/超静孔压/数值模拟Key words
plastic drainage plate/super-soft ground/equivalent permeability coefficient/excess pore water pressure/numerical simulation分类
建筑与水利引用本文复制引用
董超强,苗雨,钱志创..塑料排水板处理超软土地基的数值模拟分析[J].土木工程与管理学报,2018,35(1):110-116,7.基金项目
国家自然科学基金(51378234) （51378234）
