锚地船舶反复抛锚作用下的隧道埋深研究  

Study on Tunnel Depth under the Action of Repeated Anchoring of Ships in Anchorage

作　　者：李延伟[1,2] 田五六[1,3] 左殿军[2] 王子悦 LI Yanwei;TIAN Wuliu;ZUO Dianjun;WANG Ziyue(Intelligent Transport Systems Research Centre(ITSC),Wuhan University of Technology,Wuhan 430063,China;National Engineering Laboratory for Port Hydraulic Construction Technology,Tianjin Research Institute for Water Transport Engineering,Ministry of Transport,Tianjin 300456,China;Beibu Gulf University,Qinzhou 535000,China;Suzhou Transportation Emergency Command Center,Suzhou 215100,China)

机构地区：[1]武汉理工大学智能交通系统研究中心,武汉430063 [2]交通运输部天津水运工程科学研究院港口水工建筑技术国家工程实验室,天津300456 [3]北部湾大学,钦州535000 [4]苏州市交通运输应急指挥中心,苏州215100

出　　处：《中国造船》2024年第4期103-112,共10页Shipbuilding of China

基　　金：国家自然科学基金项目(51979132);中央级公益性科研院所基本科研业务费专项资金项目(TKS20230407)。

摘　　要：为了研究在下穿锚地段过江隧道工程设计中如何合理确定最小埋深,以某过江隧道工程为例,采用模型试验手段预测锚地水域河床的极限冲刷深度。利用ABAQUS有限元软件数值研究锚地水域船舶多次抛锚作业对河床土体的作用,给出了船舶反复抛锚入土影响深度。结果表明,极限冲刷后锚地河床最低点高程为-28.2 m。在此地形条件下,船舶反复抛锚作业对土体的扰动使得河床表面土层的抗剪强度降低。30 000 t级海船反复抛锚的船锚入土深度为3.61 m,冲击力影响深度为2.61 m;50 000 t级海船反复抛锚的船锚入土深度为3.90 m,冲击力影响深度为2.89 m。从安全角度出发,隧道顶高程至少应控制在-34.99 m以下。研究结论可为穿越锚地和停泊区水域的水下过河建筑物埋深设计提供指导。To determine the minimum buried depth reasonably for the design of the underwater tunnel crossing under anchorage waters,the cross-river tunnel project is taken as an example,and an experimental study is conducted to predict the ultimate scour depth of the riverbed in the anchorage waters.The finite element sofiware ABAQUS was used to study the action of multiple anchoring on the soil of the riverbed,and its influence on depth into the soil was given.The results showed that the lowest elevation of the bed of the anchorage is-28.2 m,and the disturbance of soil mass caused by repeatedly anchoring reduces the shear strength of the soil layer on the bed surface.The depth of embedment is 3.61 m and the impact depth is 2.61 m for a 30000-tonnage ship in repeated anchoring,while the depth of embedment is 3.9 m and the impact depth is 2.89 m for a 50000-tonnage ship.From the viewpoint of safety,the tunnel should be buried at least-34.99-meter below.The research can provide theoretical guidance for the buried depth design of underwater crossing structures in anchoring and berthing areas.

关 键 词：反复抛锚 极限冲刷 入土深度 冲击力影响深度 隧道工程 

分 类 号：U697[交通运输工程—港口、海岸及近海工程]