摘要
为研究波浪作用下沉管管段沉放过程的运动特性,开展了实验室沉管沉放的试验研究,量测了沉管管段的运动响应及沉放系统的缆绳受力,分析了管段运动位移和缆绳受力随相对波高H/h、相对宽度b/λ和相对沉深d/h的变化规律.结果表明:较小管段沉深情况下,管段的运动表现出强非线性特征;管段的运动响应随b/λ和d/h的增加而很快减小.管段沉深较小时,波高对管段的无量纲运动位移的影响较明显;迎浪侧的缆绳最大张力稍大于背浪侧的缆绳最大张力.较小的管段沉深情形下,两侧的缆绳张力相位差较明显;缆绳张力随b/λ的减小而增大,随H/h的减小和d/h的增大而减小.
Experiment was carried out to investigate the motion responses of the tunnel element in the immersion under wave actions and the tensions acting on the controlling cables of its immersing system. The variation of motion responses of the tunnel element and cable tensions against relative wave height H/h, relative width b/λ and relative immersing depth d/h were obtained. Results show that motions of the tunnel element have strong nonlinearity when the immersing depth is relatively small. The motion responses decrease rapidly with the increase of b/λ and d/h. The wave height has effects on the non-dimensional displacements of the tunnel element and the effects are obvious in the case of small immersing depth. The maximum tension of the offshore side cable is slightly higher than that of the onshore side cable. The phase difference of the cable tensions is obvious in the case of small immersing depth. The cable tensions increase with the decrease of b/λ, and decrease as the wave height decreases and the immersing depth increases.
出处
《大连海事大学学报》
CAS
CSCD
北大核心
2009年第2期10-14,共5页
Journal of Dalian Maritime University
基金
国家自然科学基金重点项目资助(50439010)
教育部重大项目资助(305003)
关键词
沉管隧道
运动响应
缆绳张力
沉管沉放
immersed tunnel
motion response
cable tension
tunnel immersion
