摘要
为了解和掌握潮汐对过江隧道江中段沉管高程的影响,对江中段沉管组织了连续36小时沉降观测,结果表明高程达最低、最高的时刻分别与潮位达最高、最低的时刻基本一致,沉管江中段高程与潮汐有较强的相关性,经谐波分析,沉管高程与潮位均表现为以12小时为周期的周期运动,振幅分别达2.8mm、1061.5mm,相位差为170°,潮位达波峰22分钟后高程达波谷。由此可以得出结论:隧道沉管竣工后经较长一段时间的稳定期,沉管高程的这种日变化规律主要是由潮汐变化引起。
In order to learn about the influence of oceanic tide on the tunnel crossing Huangpu River and master the rule of the deformation, a continuous plan was carried out for 36 hours. The monitoring result shown that the height of monitoring was consistent with the oceanic tide . That is, when oceanic tide rose to maximum, height decreased to minimum, vice versa. The height and oceanic tide had stronger relativity. Analysis of Humorous wave interpreted the deformation characteristic to a further extend, both period were 12 hours, amplitudes reach to 2.8mm and 1061.5mm separately , differential phase was 170 degree. Due to the influence of oceanic tide delayed 22 minutes, the differential phase was not just 180 degree. Finally,the conclusion can be draw that the oceanic tide was the main cause of humorous character of height curve .
关键词
过江隧道
沉管
沉降监测
潮汐
the tunnel crossing Huangpu River,immersed tube, subsidence monitoring, oceanic tide
