摘要
城市隧道建设过程中,由于地形、地质条件复杂,周边环境敏感因素多,洞口存在滑坡、浅埋、斜交、偏压等不良情况,且对沉降、变形控制要求严格,导致隧道进洞困难。以重庆曾家岩嘉陵江大桥城市阳台进洞段为依托,提出具有抗滑功能且可兼做隧道结构和城市观光平台结构的刚性框架结构方案和"桩板墙+轻质混凝土反压回填+明洞暗作与既有挡墙斜交进洞"方案。通过数值模拟,对隧道进洞施工过程中结构的应力、变形等进行分析,结果表明:该"斜交进洞"方案结构受力合理,能保证边仰坡稳定和结构安全,地表变形控制较好。
In the process of urban tunnel construction,there are landslide,shallow buried,bias and unbalanced stress in the tunnel opening due to the complicated terrain and geological conditions and the sensitive ambient factors,and it has strict requirement to settlement and deformation control,the tunneling is relatively difficult. In this paper,a rigid frame structure scheme with anti-sliding function that can be used as tunnel structure and city sightseeing platform structure,as well as a scheme of ＂ pile-wall/lightweight backfill/hidden construction of open holes oblique with existing retaining wall tunneling＂,are put forward based on Chongqing Zengjiajian Jialing River Bridge＇s city balcony scheme. Through numerical simulation,this paper analyzes stress and deformation of structures during tunneling construction. The results show that the force on structure in the ＂ oblique tunneling＂ is reasonable,it can ensure the slope stability and structural safety,good terrain deformation control.
出处
《公路交通技术》
2016年第6期93-99,共7页
Technology of Highway and Transport
基金
重庆市应用开发(重点)项目(csct2013yykf B30005)
关键词
城市隧道
框架
环境敏感
进洞
urban tunnel
frame
environment sensitivity
tunneling
