波流作用下高桩码头动力响应试验研究  

Experimental investigation of dynamic response of pile-supported wharf under wave-current action

作　　者：毕建巍 苏雷 解立波 张昱[2] 凌贤长[1,3] BI Jian-wei;SU Lei;XIE Li-bo;ZHANG Yu;LING Xian-zhang(School of Civil Engineering,Qingdao University of Technology,Qingdao 266520,China;State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024,China;School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,China)

机构地区：[1]青岛理工大学土木工程学院,山东青岛266520 [2]大连理工大学,海岸与近海工程国家重点实验室,辽宁大连116024 [3]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090

出　　处：《水运工程》2023年第2期37-43,73,共8页Port & Waterway Engineering

基　　金：国家自然科学基金项目(42072310、51808307)。

摘　　要：针对外海工程地质环境,以高桩码头为研究对象,设计波流作用下水槽试验方案,开展波流作用下高桩码头动力响应的试验研究,还原了高桩码头真实的使用环境,探讨高桩码头桩身内部响应差异,分析自由场与桩周土孔压和加速度的响应关系。结果表明:1)高桩码头各桩响应差异明显,顺波流方向桩身所受动水压力逐渐减小,桩身弯矩前排桩大于后排桩,中间桩大于两侧桩;2)面板位移和加速度呈周期性变化,扭转随波流作用逐渐减小;3)土层加速度和孔压随波流传播和埋深增加逐渐减小,群桩的存在会增大土层加速度、减小孔压;4)高桩码头设计时,应适当提高中间桩的强度,重视对表层海床土的加固。研究成果可为高桩码头的设计和维护提供一定的参考与借鉴。For the engineering geological environment in deep sea, a wave-current flume test scheme is designed for pile-supported wharf(PSW),and the experimental investigation on the dynamic response of PSW under wave-current action is carried out. The test really reproduces the operating condition of PSW,and the internal response difference of PSW is discussed, and the pore pressure and acceleration in the free field and soil layer around piles are analyzed. The results show that: 1)The responses of each pile in PSW are obviously different, and hydrodynamic pressure on pile decreases gradually along the wave-current direction. The bending moment on the front pile is greater than that on the rear pile, and the bending moment on the middle pile is larger than that on the bilateral pile. 2)The displacement and acceleration of deck change periodically, and the torsion decreases with wave-current action. 3)The acceleration and pore pressure of soil layer gradually decrease with the wave-current propagation and increase of the burial depth, the pile group increases acceleration of soil layer and decreases its pore pressure. 4)In the design of PSW,the strength of middle pile should be appropriately increased and the reinforcement of surface seabed soil should be emphasized. The above research can provide a reference for the design and maintenance of PSW.

关 键 词：波流作用 高桩码头 动力响应 液化场地 模型试验 

分 类 号：U656.113[交通运输工程—港口、海岸及近海工程]