剪胀围岩隧道开挖响应曲线的等价圆近似法

苏永华; 张盼凤; 肖旺

doi:10.11779/CJGE2015S1007

剪胀围岩隧道开挖响应曲线的等价圆近似法 English Version

湖南大学岩土工程研究所,湖南长沙 410082

基金项目: 国家自然科学基金项目（51378195,51078136）; 湖南省交; 通科技项目（201224）

详细信息

作者简介:
苏永华(1966- ),男,湖南涟源人,博士(后),教授,博士生导师,主要从事地下结构工程的教学与科研工作。

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出版历程
- 收稿日期: 2015-03-25
- 发布日期: 2015-07-24

Equivalent circular approximation method for response curve tunnel excavation of dilatant surrounding rock

Geotechnical Engineering Institute, Hunan University, Changsha 410082, China

摘要

摘要: 针对岩体受开挖影响进入塑性状态后存在剪胀及非圆形隧道围岩响应状态无法解析求解的现状,选用反映围岩剪胀的本构关系,围绕建立各种断面形状隧道围岩开挖后的响应特征描述函数展开研究。首先,建立各种断面形状隧道开挖数值模型并进行模拟分析,利用其结果绘制矩形、直墙拱形和曲墙拱形等常见断面隧道围岩对开挖的响应曲线。然后在同样条件下绘制矩形、直墙拱形及曲墙拱形断面在5种等价圆形断面方法下,基于Duncan-Fama提出的考虑剪胀的圆形断面隧道开挖围岩响应弹塑性特征曲线。最后,比较它们与数值模拟结果绘制曲线的接近程度,获得与数值模拟结果曲线最接近的等代圆方法,为任意断面形状剪胀围岩隧道开挖响应特征解析函数的建立提供了便利。
- 岩体扩容 /
- 隧道工程 /
- 断面形状 /
- 等价圆方法 /
- 响应曲线
Abstract: In view of dilatancy after rock mass enters the plastic state induced by excavation and the situation that analytic solution for non-circular tunnel surrounding rock response status still can not be solved, the constitutive relation for the surrounding rock that can reflect the dilatancy is selected, and then, the response characteristic functions of the surrounding rock of tunnel for all kinds of section forms after excavation are established. First, numerical model for various cross-section shapes of tunnel excavation is established and analyzed, and the results are used to draw the surrounding rock after excavation, such as response curves of common tunnel sections of rectangle, straight wall arch and curved wall arch. Then, under the same conditions, the elastic-plastic response characteristic curves of cross-sections of rectangle, straight wall and curved wall arch under 5 kinds of equivalent circular section method are drawn based on the analytical method for circular tunnel proposed by Duncan-Fama considering dilatancy. Finally, the closeness degree between the analytical and numerical simulation curves, is compared in order to obtain the equivalent circular method corresponding to the closest analytical curve. It may provide convenienle for the establishment of response characteristic analytic function for dilatant surrounding rock of tunnel with arbitrary cross-section.
- dilatancy of rock mass /
- tunnel engineering /
- section form /
- equivalent circle method /
- response curve

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参考文献(14)

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文章访问数: 279
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剪胀围岩隧道开挖响应曲线的等价圆近似法 English Version

作者简介: 苏永华(1966- ),男,湖南涟源人,博士(后),教授,博士生导师,主要从事地下结构工程的教学与科研工作。

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出版历程

Equivalent circular approximation method for response curve tunnel excavation of dilatant surrounding rock

计量

出版历程

目录

作者简介:
苏永华(1966- ),男,湖南涟源人,博士(后),教授,博士生导师,主要从事地下结构工程的教学与科研工作。