摘要
海底隧道不同于陆上隧道,海水位变化相对隧道埋深较小,隧道两端出口比海底部分要高,不能采用自然排水。深埋海底隧道二次衬砌承受较大的外水压力。调查了国内外海底隧道衬砌结构型状及支护参数,针对海底隧道的特殊性,归纳了海底隧道设计理念和设计方法。针对某公路海底隧道特定地质条件和工程设计要求,分别采用马蹄形、椭圆形、圆形3种衬砌结构型式,并用有限元软件对这3种衬砌结构二次衬砌在不同荷载作用下进行强度验算。对计算结果优化比选,选出一种技术可行、经济合理的衬砌结构,得出一些有意义的结论。
Subsea tunnel is different from land tunnel and sea water level changes slightly relative to subsea tunnel depth. Automatic drainage is not adopted for subsea tunnel because its two exits are higher than underwater segment. Great hydrostatic pressure loads on the second lining structure. Lots of lining types about domestic and overseas subsea tunnels are investigated. According to subsea tunnel characteristics, subsea tunnel design theory and method are presented. Considering the geology and hydrology conditions of certain subsea tunnel, three lining structure types are adopted such as U-shape, ellipse and circle shapes. These three lining structures are computed with finite element method. Some valuable conclusions are made as follows： （1） lining of horse shape may sustain much water pressure in the condition of limited drainage; （2） it is reasonable that lining of ellipse sustains geological stress in great water pressure; （3） it is the most reasonable that lining of circle sustains geological stress while lining of full impermeability is adopted in subsea tunnel.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2005年第21期3894-3902,共9页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金杰出青年基金项目(50229901)
关键词
隧道工程
海底隧道
衬砌结构型式
工程类比
荷载结构法
tunnelling engineering
subsea tunnel
lining structure type
engineering analogy
load structural method
