隧道内深基坑开挖受力机理和变形特点
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- 英文论文题名：Mechanical Mechanism and Deformation Characteristics of Deep Foundation Pit Excavation in Tunnel
- 论文作者：康神豪 ; 崔江余 ; 陈文 ; 王昭
- 英文论文作者：Kang Shenhao ; Cui Jiangyu ; Chen Wen ; Wang Zhao ; School of Civil Engineering ; Beijing Jiaotong University ; BECG Civil Engineering Co. ; Ltd.
- 年：2016
- 作者机构：北京交通大学土木建筑工程学院;北京建工土木工程有限公司;
- 论文关键词：基坑 ; 隧道 ; 变形 ; 应力
- 英文论文关键词：foundation excavation ; tunnel ; deformation ; stress
- 会议召开时间：2016-12-02
- 会议录名称：第十一届建筑物改造与病害处理学术研讨会暨第六届工程质量学术会议论文集
- 语种：中文
- 分类号：U452.11
- 学会代码：SGJS
- 会议名称：第十一届建筑物改造与病害处理学术研讨会暨第六届工程质量学术会议
- 会议地点：中国海南海口
- 主办单位：中国老教授协会土木建筑专业委员会、中国土木工程学会工程质量分会、北京交通大学土木建筑工程学院
- 学会名称：施工技术编辑部
- 页数：5
- 文件大小：1934k
- 原文格式：O
- 会议级别：全国
摘要
本文针对目前城市建设过程中产生的大量深基坑工程,进行对隧道内深基坑开挖对隧道变形及内力影响的研究。本文基于大量工程案例资料,以北京五棵松地下停车库工程有限元计算为基础,采用理论计算分析及数值模拟计算方法,选择岩土数值分析软件MIDAS/NX,建立三维模型,模拟基坑开挖和围护结构施工的实际过程,计算分析基坑施工引起的隧道结构变形;从提取的数据结果可以看出,基坑开挖会引起由于隧道开挖发生沉降的上层土体产生少许隆起,并且使得隧道侧墙有较小的向隧道外侧的水平位移,而侧墙以下至基坑底部的土体则有少许向基坑内的位移。从受力角度来看,基坑开挖使得隧道结构的轴力与剪力有明显的增大,而对于弯矩和扭矩的影响不大。因此从整体来看,对隧道变形的影响不大,而需要改善隧道结构抗压抗拉以及抗剪的能力。
In this paper,a large number of deep foundation excavation engineering is produced in the process of urban construction,and the influence of excavation on deformation and internal force of tunnel is studied.Based on a large number of engineering cases,according to the Beijing Wukesong Underground Garage Engineering finite element calculation,the theoretical calculation and the numerical simulation method,geotechnical engineering numerical analysis software MIDAS/NX are used to establish the three-dimensional model,the the actual process of the retaining structure of foundation excavation and construction are simulated,and the tunnel structure deformation caused by foundation excavation construction are calculated and analyzed;Results from the extracted data can be seen,that the excavation of foundation excavation can cause a little uplift of the upper layer soil which is caused by the settlement of the tunnel excavation,and the lateral wall of the tunnel has a small horizontal displacement at the lateral side of the tunnel,and the soil at the bottom of the side wall to the foundation pit is following a little displacement towards base pit.From the point of force,the axial force and shear force of the tunnel structure are obviously increased,and the influence of the bending moment and torque is not significant.As a whole,there is little effect on tunnel deformation,and it needs to improve the tensile strength and shear strength of the tunnel structure.
In this paper,a large number of deep foundation excavation engineering is produced in the process of urban construction,and the influence of excavation on deformation and internal force of tunnel is studied.Based on a large number of engineering cases,according to the Beijing Wukesong Underground Garage Engineering finite element calculation,the theoretical calculation and the numerical simulation method,geotechnical engineering numerical analysis software MIDAS/NX are used to establish the three-dimensional model,the the actual process of the retaining structure of foundation excavation and construction are simulated,and the tunnel structure deformation caused by foundation excavation construction are calculated and analyzed;Results from the extracted data can be seen,that the excavation of foundation excavation can cause a little uplift of the upper layer soil which is caused by the settlement of the tunnel excavation,and the lateral wall of the tunnel has a small horizontal displacement at the lateral side of the tunnel,and the soil at the bottom of the side wall to the foundation pit is following a little displacement towards base pit.From the point of force,the axial force and shear force of the tunnel structure are obviously increased,and the influence of the bending moment and torque is not significant.As a whole,there is little effect on tunnel deformation,and it needs to improve the tensile strength and shear strength of the tunnel structure.
引文
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