地面堆载条件下交叉穿越隧道的竖向位移计算方法研究

doi:10.3973/j.issn.2096-4498.2018.05.015

隧道建设（中英文） ›› 2018, Vol. 38 ›› Issue (5): 818-823.DOI: 10.3973/j.issn.2096-4498.2018.05.015

地面堆载条件下交叉穿越隧道的竖向位移计算方法研究

高继锦，黄彪，张威，陈锦剑^*

（上海交通大学土木工程系，上海 200240）

收稿日期:2017-01-04 修回日期:2017-12-12 出版日期:2018-05-20 发布日期:2018-06-01
作者简介:高继锦(1990—)，男，辽宁盘锦人，上海交通大学土木工程专业在读硕士,研究方向为岩土工程。Email： gjj31415@163.com。*通信作者：陈锦剑， Email： chenjj29@sjtu.edu.cn。
基金资助:
上海市科学技术委员会科研项目（13231200402）

Study of Calculation Method for Vertical Displacement of  Crossed Tunnels under Surface Surcharge Loading

GAO Jijin, HUANG Biao, ZHANG Wei, CHEN Jinjian^*

(Department of Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China)

Received:2017-01-04 Revised:2017-12-12 Online:2018-05-20 Published:2018-06-01

摘要/Abstract

摘要：

为研究地面堆载作用下交叉穿越隧道的竖向位移特性和快速分析评估地面堆载对交叉隧道的影响，考虑土体与隧道、隧道与隧道的相互作用，基于Boussinesq解和Mindlin解，提出交叉穿越隧道竖向位移的解析公式，并通过土与隧道的位移协调、隧道结构的弯曲变形分析进行编程求解。与地表堆载作用下的模型试验和三维有限元结果进行对比分析，计算误差在10%左右，验证本文解析方法的合理性。通过参数分析探讨交叉隧道间距及交叉角度对竖向位移的影响，结果表明：隧道交叉穿越的相互影响导致上部隧道位移减小、下部隧道位移增大；这种影响随隧道间距和交叉角度的减小而增大，交叉隧道由正交变为上下平行时，上部隧道最大位移减小30%，因此在小角度交叉穿越的隧道中更应考虑两隧道的相互影响。

关键词: 交叉隧道, 竖向位移, 简化算法, 地面堆载, 解析解

Abstract:

A simplified analytical formula for vertical displacement calculation of crossed tunnels is proposed to analyze the deformation characteristics of crossed tunnels under surcharge loading and make a quick estimation based on Boussinesq Equations and Mindlin Equations considering interaction between soil and tunnel and that between tunnels. The programming solution is carried out by analyzing displacement coordination of soiltunnel and bending deformation of tunnels. The calculation results of the model are compared with those of 3D finite element under condition of surface surcharge loading, of which the results show 10% of calculation error, which indicates the rationality of the analytical solution method mentioned above. The results of parametric study of the influence of span and angle between crossed tunnels on vertical displacement show that: (1) The vertical displacement of the upper tunnel decreases; while the vertical displacement of the lower tunnel increases under the interaction between crossed tunnels. (2) The vertical displacement of the upper tunnel decreases; while the vertical displacement of the lower tunnel increases with the span or angle between crossed tunnels decrease; the maximum displacement of the upper tunnel reduces by 30% when the angle between crossed tunnels reduces from 90° to 0°; hence the interaction between crossed tunnels should be carefully considered when the angle between crossed tunnels is small.

Key words: crossed tunnels, vertical displacement, simplified calculation method, surface surcharge loading, analytical solution

中图分类号:

U 456

高继锦，黄彪，张威，陈锦剑. 地面堆载条件下交叉穿越隧道的竖向位移计算方法研究[J]. 隧道建设, 2018, 38(5): 818-823.

GAO Jijin, HUANG Biao, ZHANG Wei, CHEN Jinjian. Study of Calculation Method for Vertical Displacement of  Crossed Tunnels under Surface Surcharge Loading[J]. Tunnel Construction, 2018, 38(5): 818-823.

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地面堆载条件下交叉穿越隧道的竖向位移计算方法研究

Study of Calculation Method for Vertical Displacement of  Crossed Tunnels under Surface Surcharge Loading

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