| 斜坡软弱地基路堤工程特性的数值模拟 |
| |
| 引用本文： | 刘晋南,蒋鑫,邱延峻. 斜坡软弱地基路堤工程特性的数值模拟[J]. 中国铁道科学, 2011, 32(2) |
| |
| 作者姓名： | 刘晋南 蒋鑫 邱延峻 |
| |
| 作者单位： | 西南交通大学,高速铁路线路工程教育部重点实验室,四川,成都,610031 |
| |
| 基金项目： | 国家重点基础研究发展计划项目，中央高校基本科研业务费专项资金资助项目 |
| |
| 摘 要： | 在斜坡软弱地基上修筑填方路堤容易出现滑塌失稳、侧向变形过大等重大工程事故.运用非线性有限元及剪切强度折减法,模拟路堤分步建造的施工力学行为,建立斜坡软弱地基在路堤自重荷载作用下的数值分析模型,从土体变形和稳定安全性2方面研究表层软弱层、地面横坡对路基结构工程特性的影响.结果表明:斜坡软弱地基不能被简单视为斜坡地基和软弱地基的等权重线性叠加;表层软弱层、地面横坡可加剧结构的侧向位移、竖向沉降,改变潜在滑移面的形态,导致路堤结构稳定性降低;实际工程中应高度重视下坡脚方向侧向位移和表层软弱层的处理;运用非线性有限元法结合剪切强度折减法,能同时进行斜坡软弱地基在路堤自重作用下变形与稳定性分析.
|
| 关 键 词： | 斜坡软弱地基 填方路堤 强度折减法 土体变形 稳定安全性 |
Numerical Simulation on the Engineering Behavior of Embankment over Sloped Weak Ground |
| |
| LIU Jinnan,JIANG Xin,QIU Yanjun. Numerical Simulation on the Engineering Behavior of Embankment over Sloped Weak Ground[J]. China Railway Science, 2011, 32(2) |
| |
| Authors: | LIU Jinnan JIANG Xin QIU Yanjun |
| |
| Affiliation: | LIU Jinnan,JIANG Xin,QIU Yanjun(MOE Key Laboratory of High-Speed Railway Engineering,Southwest Jiaotong University,Chengdu Sichuan610031,China) |
| |
| Abstract: | Major engineering accidents such as slump,large lateral deformation occurred when people constructed fill embankment on sloped weak ground.Using nonlinear finite element method and strength reduction method,simulating the mechanical behaviour of the embankment of staged construction,building numerical analysis model of embankment over sloped weak ground which is only loaded with gravity,analyzing the relationship between deformation and stability on soil body,combining the results of geotechnical centrifuge... |
| |
| Keywords: | Sloped weak ground Fill embankment Strength reduction method Soil deformation Stability safety |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
