摘要
应用B iot固结理论作为控制方程,采用有限元计算并结合工程实例分析研究了排水固结法地基处理水平边界条件对地基沉降的影响。计算结果和现场观测值的研究表明,路基施工过程中水平边界条件受限、横向排水通道被堵影响了地基的排水固结,导致了施工期沉降量和沉降速率变小,对工后沉降量和路基稳定性的控制均不利,但道路运营阶段水平边界条件被封闭,可减少道路运营期间的沉降量、沉降速率和工后沉降量,延长道路的使用寿命,具有一定的工程实践意义。
This paper discussed the influence of horizontal boundary condition on settlement of subgrade im proved with drainage consolidation. This influence is confirmed not only by calculation using finite element method （FEM} but also by field data. It is verified that the drainage consolidation should be affected significantly when the horizontal boundary condition is changed during the construction. Settlement or settlement ratio in construction course would decreased if the transverse drainage route jammed and accordingly do harm to post construction settlement control and subgrade stability. While to close the horizontal drainage channel after construction is in favor of reducing settlement in course of operation and can prolong the facility life.
出处
《地下空间与工程学报》
CSCD
北大核心
2009年第3期587-593,共7页
Chinese Journal of Underground Space and Engineering
关键词
BIOT固结理论
排水固结法
地基沉降
有限元
水平边界条件
Biot consolidation theory
drainage consolidation
subgrade settlement
FEM （ finite element meth-od）
horizontal drainage condition
