波浪作用下椭圆形横截面悬浮隧道管段压强特性试验  

Experimental Study of Pressure Characteristics of Elliptical Cross-section Submerged Floating Tunnel Pipeline under Wave Actions

作　　者：李勤熙 蒋树屏 丁浩[3] 李科[3] LI Qinxi;JIANG Shuping;DING Hao;LI Ke(School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China;Traffic Management Bureau of Chongqing Wansheng Economic and Technical Development District,Chongqing 400800,China;China Merchants Chongqing Communication Research&Design Institute Co.,Ltd.,Chongqing 400067,China)

机构地区：[1]重庆交通大学土木工程学院,重庆400074 [2]重庆市万盛经济技术开发区交通局,重庆400800 [3]招商局重庆交通科研设计院有限公司,重庆400067

出　　处：《隧道建设（中英文）》2018年第1期57-64,共8页Tunnel Construction

基　　金：国家交通运输部重大建设科技项目(2013318740050);重庆市研究生教育创新基金项目(CYB17130)

摘　　要：为研究悬浮隧道在波浪力作用下的波动特性,以琼州海峡跨海通道工程为背景,设计一种双向6车道悬浮隧道交通结构,开展9种不同工况下模型比尺为1∶60的水力物理模型试验,分析悬浮隧道结构在不同波浪高度、不同波浪周期下的迎浪面、背浪面和上下表面的压强变化特性。首先,根据悬浮隧道管段迎浪面、背浪面和上下表面波峰、波谷时刻的压强包络线分布规律,发现管段垂向压强差值显著大于水平向。然后,比较周期和波高变化对压强极值的影响,在相同周期下,管段表面压强极值随波高的增大而增大;在相同波高下,压强极值随周期的增大而减小。最后,在一个波浪周期内,悬浮隧道结构出现了多个局部峰值,在不同波高下,峰值次数随周期的增大而规律增加。研究表明:波高是影响结构稳定的主要因素之一,并应重点关注短周期波浪对结构的稳定影响以及结构的垂向受力变化。A two-way six-lane submerged floating tunnel is designed based on the hydrological elements of Qiongzhou Strait;and then the 1∶[KG-*2]60 hydraulic physical model experiment is carried out under 9 different working conditions.The pressure variation of the wave face,the wave back face and the upper and lower surface of the submerged floating tunnel structure under different wave heights and wave periods are analyzed.The analytical results of the distribution rules of pressure envelope lines of wave face,wave back face and upper and lower surface of submerged floating tunnel structure at wave peak and wave trough show that the pressure along vertical direction of segment is much higher than that along horizontal direction of segment.The influences of wave period and wave height on pressure peak are comparatively analyzed.The results show that the pressure peak on segment surface increases with the wave height increase;and the pressure peak on segment surface decreases with the wave period increase under same wave height.Multiple local pressure peaks occur to submerged floating tunnel structure in a wave period;and the time of pressure peak increases regularly with wave period increase under same wave height.The study results show that the wave height is one of the main factors of structural stability;and the influence of short period wave on the structural stability and the variation of vertical stress of the structure should be paid attention to.

关 键 词：悬浮隧道 波浪试验 波动特性 表面压强 椭圆形断面 

分 类 号：U459.5[建筑科学—桥梁与隧道工程]