深厚层软土地基袋装砂井处治的数值模拟  

Numerical Simulation of Deep Soft Ground Treatment by Sacked Sand Drain

作　　者：蒋鑫[1] 邱延峻[1] 周成[2] 

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]铁道第二勘察设计院,四川成都610031

出　　处：《中国铁道科学》2005年第1期31-35,共5页China Railway Science

基　　金：铁道第二勘察设计院科研项目(科2003 6)

摘　　要：基于平面变形、空间渗流(PDSS)理论,从路基工后沉降角度出发,用岩土工程静力分析有限元程序PDSS2000,进行袋装砂井处治深厚层软基的数值模拟分析,研究全过程的软基沉降、侧移、孔压分布规律。结果表明,袋装砂井能有效加速软基的排水固结。对于福厦线一般地段,当路基高度为6m时,采用间距为1 0m的袋装砂井处治软基能满足路基工后沉降要求。Based on the theory of plane deformation, spatial seepage, an available finite element software PDSS2000 written for geotechnical engineering static analysis and application was conducted to simulate the mechanical behavior of sand-drained ground beneath railroad embankment from the viewpoint of the post-construction settlement. The research results about soft ground settlement, lateral displacement and pore water pressure distribution character have convincingly argued that sand drains can be used to accelerate the process of consolidation and settlement effectively. Some advice was proposed to control the post-construction settlement of soft ground with sand drains spacing 1 m at triangular pattern with 6 m height embankment for Fuzhou-Xiamen high-speed railway ordinary sections.

关 键 词：软基 BIOT固结 袋装砂井 变形 数值模拟 

分 类 号：U213.14[交通运输工程—道路与铁道工程]