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系梁式桩网结构加固斜坡软弱地基路堤的数值模拟

黄兵,  耿建宇,  蒋鑫,  梁多伟,  邱延峻

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文章导航 > 交通运输工程学报  > 2014 >  14(6): 35-43
黄兵, 耿建宇, 蒋鑫, 梁多伟, 邱延峻. 系梁式桩网结构加固斜坡软弱地基路堤的数值模拟[J]. 交通运输工程学报, 2014, 14(6): 35-43.
引用本文: 黄兵, 耿建宇, 蒋鑫, 梁多伟, 邱延峻. 系梁式桩网结构加固斜坡软弱地基路堤的数值模拟[J]. 交通运输工程学报, 2014, 14(6): 35-43.
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HUANG Bing, GENG Jian-yu, JIANG Xin, LIANG Duo-wei, QIU Yan-jun. Numerical simulation of embankment on sloped weak ground reinforced by pile-net structure with collar beam[J]. Journal of Traffic and Transportation Engineering, 2014, 14(6): 35-43.
Citation: HUANG Bing, GENG Jian-yu, JIANG Xin, LIANG Duo-wei, QIU Yan-jun. Numerical simulation of embankment on sloped weak ground reinforced by pile-net structure with collar beam[J]. Journal of Traffic and Transportation Engineering, 2014, 14(6): 35-43.
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系梁式桩网结构加固斜坡软弱地基路堤的数值模拟

  • 1.

    西南交通大学 土木工程学院, 四川 成都 610031

  • 2.

    西南交通大学 道路工程四川省重点实验室, 四川 成都 610031

  • 3.

    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

  • 4.

    四川成德南高速公路有限责任公司, 四川 成都 610041

基金项目: 

国家自然科学基金项目 51378440

国家973计划项目 2013CB036204

中央高校基本科研业务费专项资金项目 SWJ-TU12CX067

中央高校基本科研业务费专项资金项目 SWJTU12ZT05

详细信息
    作者简介:

    黄兵(1969-), 男, 四川什邡人, 四川成德南高速公路有限责任公司教授级高级工程师, 西南交通大学工学博士研究生, 从事道路工程建设与管理研究

    邱延峻(1966-), 男, 浙江衢州人, 西南交通大学教授, 工学博士

  • 中图分类号: U416.12

Numerical simulation of embankment on sloped weak ground reinforced by pile-net structure with collar beam

  • 1.

    School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China

  • 2.

    Highway Engineering Key Laboratory of Sichuan Province, Southwest Jiaotong University, Chengdu 610031, Sichuan, China

  • 3.

    Key Laboratory of High-Speed Railway Engineering of Ministry of Education, Southwest Jiaotong University, Chengdu 610031, Sichuan, China

  • 4.

    Sichuan Chengdenan Expressway Limited Liability Company, Chengdu 610041, Sichuan, China

More Information

    摘要
  • 摘要: 为研究系梁式桩网结构应用于斜坡软弱地基路堤工程的工作机制, 建立了系梁式桩网结构加固斜坡软弱地基路堤的有限元模型, 开展了与无处治措施时潜在滑动面形态、稳定安全系数、土工格栅拉力、路基顶面沉降及地基侧向位移等力学响应的对比, 并进行了系梁布置形式、弹性模量与厚度等核心设计参数的敏感性分析。研究结果表明: 系梁式桩网结构加固后的斜坡软弱地基路基最大沉降、差异沉降以及地基侧向变形分别减小了88.7%、90.3%、96.6%, 路基的稳定安全系数提高了26.2%;纵横交叉布置系梁有利于提高路堤稳定安全性, 削减地基侧向位移; 适当降低系梁弹性模量不会造成较大不利影响, 系梁厚度不宜过薄。

     

    Abstract: To investigate the working mechanism of pile-net structure with collar beam applied in the embankment on sloped weak ground, the finite element model of embankment on sloped weak ground reinforced by pile-net structure with collar beam was established.Some mechanical responses with or without reinforcement, including potential slip surface behaviors, stability safety factors, geogrid tensions, embankment top surface settlements and ground lateral displacements, were compared.The sensitivities of core design parameters, such as collar beam location type, elastic modulus and thickness, were analyzed.Study result shows that the pile-net structure with collar beam can decrease the embankment maximum settlement, differential settlement and ground lateral deformation by 88.7%, 90.3% and 96.6%, respectively, and improve the stability safety factor by 26.2%.Arranging the collar beam crossbar is beneficial toimprove the embankment stability safety and reduce the ground lateral displacement.Decreasing the elastic modulus of collar beam appropriately will not cause relatively large unfavorable effect, and too thin collar beam is not suitable.

     

    • HTML全文

  • 图  1  有限元计算几何模型

    Figure  1.  Geometry model of finite element calculation

    下载: 全尺寸图片 幻灯片

    图  2  系梁的平面应变化

    Figure  2.  Plane strain simplifications of collar beams

    下载: 全尺寸图片 幻灯片

    图  3  路基潜在滑动面

    Figure  3.  Potential slip surfaces of embankments

    下载: 全尺寸图片 幻灯片

    图  4  稳定安全系数变化

    Figure  4.  Change of stability safety factor

    下载: 全尺寸图片 幻灯片

    图  5  土工格栅拉力分布

    Figure  5.  Distributions of geogrid tensions

    下载: 全尺寸图片 幻灯片

    图  6  路堤顶面沉降

    Figure  6.  Settlements of embankment top surfaces

    下载: 全尺寸图片 幻灯片

    图  7  b-b′断面的地基侧向位移分布

    Figure  7.  Ground lateral displacement distributions at b-b′section

    下载: 全尺寸图片 幻灯片

    图  8  系梁不同布置形式下的位移

    Figure  8.  Displacements under different collar beam arrangement types

    下载: 全尺寸图片 幻灯片

    图  9  不同系梁弹性模量下的位移

    Figure  9.  Displacements under different collar beam elastic moduli

    下载: 全尺寸图片 幻灯片

    图  10  不同系梁厚度下的位移

    Figure  10.  Displacements under different collar beam thicknesses

    下载: 全尺寸图片 幻灯片

    表  1  土体参数

    Table  1.   Soil parameters
    下载: 导出CSV

    表  2  计算模型工况

    Table  2.   Calculation model conditions
    下载: 导出CSV
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