城市地下道路立交隧道合理间距及支护加强范围研究

发布时间：2018-06-23 15:50

本文选题：城市地下道路 + 立交隧道　；参考：《现代隧道技术》2015年06期

【摘要】：文章围绕北京城市地下道路立交隧道设计施工中亟待解决的横纵向合理间距确定这一关键问题,以城市地下道路三车道隧道为例,基于北京城区地质条件的分层概化,采用数值模拟方法计算分析了30种工况(5种竖向间距和6种水平间距)下围岩变形规律与稳定性特点,指出竖向间距和水平间距对地表沉降、立交部位洞周位移和地层塑性区等的影响规律,提出了建议的立交隧道横纵向合理间距和结构加强范围。结果表明,水平间距对立交隧道地层变形影响显著,宜取1倍隧道洞径以上;且无论水平间距多大,受立交隧道施工影响较为显著的区域主要集中在距立交中心点3倍洞径的圆形区域。
[Abstract]:This paper focuses on the key problem of determining the reasonable distance between horizontal and longitudinal in the design and construction of Beijing urban underground road interchange tunnel. Taking the three-lane tunnel of urban underground road as an example, based on the stratified generalization of geological conditions in Beijing urban area, The deformation law and stability characteristics of surrounding rock under 30 working conditions (5 vertical spacing and 6 horizontal spacing) are calculated and analyzed by using numerical simulation method. It is pointed out that vertical spacing and horizontal spacing affect ground subsidence. On the basis of the influence rules of the displacement around the tunnel and the plastic zone of the stratum at the interchange site, the reasonable horizontal and longitudinal spacing and the strengthening range of the structure of the overpass tunnel are put forward. The results show that the horizontal spacing has a significant effect on the formation deformation of the interchange tunnel, and it is appropriate to take the tunnel diameter more than 1 times, and no matter how large the horizontal spacing is, The area affected by the construction of the interchange tunnel is mainly located in the circular area 3 times the diameter of the tunnel from the center of the interchange.
【作者单位】：北京工业大学城市与工程安全减灾教育部重点实验室;北京城市交通协同创新中心;北京交通大学城市地下工程教育部重点实验室;
【基金】：国家科技支撑计划课题资助项目(2012BAJ01B03)
【分类号】：U412.373.1;U452

【共引文献】