亚洲快线海底光缆香港段路由条件及评价

根据在亚洲快线海底光缆香港段(水深小于300m区域)开展的路由勘察中获取的浅地层剖面、侧扫声纳、柱状取样、多波束等数据,同时结合该区域的自然环境特征,对路由区的海底工程地质条件、自然环境条件等进行了详细的分析。通过分析发现,路由区海底地形无大的起伏,平均坡度小于0.3%;路由区跨越了淤泥/粘土质、砂质以及沙波区海底,其中发现的沙波最大波高达3~4m;路由区地震活动强度小,属于地壳稳定性较好的地区;路由区海底面存在沉船、抛弃物等海底障碍物。综合所有获取的数据和信息,在路由跨越大型沙波及距离障碍物太近的区域,对路由线路进行了适当调整,调整后的路由基本适合海底光缆的铺设,同时也提出了一些建议。

Conditions and Evaluation of the Route of Asia Submarine-cable Express(Hongkong Segment)

Based on survey with multibeam system,side scan sonar,subbottom profiler,gravity core sampler in Hongkong route survey area,we analyze and evaluate the natural environment and engineering geologic conditions in the route area in details including:seabed terrain is flat and the average slope is less than 0.2 degree;the route crosses silt/clay/sand and sand waves seabed areas,the highest sand wave height is up to 3~4m;the route area belongs to stable crustal region;wreck and some obstacles are found on the seabed in the route area.After adjusting the route in the area where crossing the huge sand waves and close to the obstacles,the conclusion is that the natural and engineering environment of the submarine fibre-optic cable route area is suitable for cable laying.On the same time some suggests are given for the cable laying.