三维水下黏质斜坡海床变形冲蚀特征试验研究  

Experimental study on seabed deformation and erosion characteristics of three-dimensional submerged clayey slope

作　　者：窦玉喆 孙淼军 国振[1] 渠立标 朱佳慧 赵洪洋 DOU Yuzhe;SUN Miaojun;GUO Zhen;QU Libiao;ZHU Jiahui;ZHAO Hongyang(College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China;Power China Huadong Engineering Corporation Limited,Hangzhou 311122,China;Marine Geotechnical Engineering Investigation Technology and Equipment Zhejiang Engineering Research Center,Hangzhou 311122,China;Ocean College,Zhejiang University,Zhoushan 316021,China)

机构地区：[1]浙江大学建筑工程学院,浙江杭州310058 [2]中国电建集团华东勘测设计研究院有限公司,浙江杭州311122 [3]海洋岩土工程勘察技术与装备浙江省工程研究中心,浙江杭州311122 [4]浙江大学海洋学院,浙江舟山316021

出　　处：《中南大学学报（自然科学版）》2023年第5期1863-1874,共12页Journal of Central South University:Science and Technology

基　　金：海南省重大科技计划项目(ZDKJ202019);浙江省重点研发计划项目(2021C03014);浙江省自然科学基金资助项目(LR22E080005)。

摘　　要：以舟山某海域的某三维斜坡海床为原型,开展一系列大型波浪港池试验,探究波浪作用下三维黏质斜坡海床的孔压响应、变形及冲蚀破坏特征。研究结果表明:当波高较小时,黏质斜坡海床内部的超孔压累积不明显,多表现为振荡孔压;当波高逐渐增大时,黏质斜坡发生由坡顶到坡脚的浅层破坏,在靠近坡脚处出现明显的黏土碎屑状堆积,海床内超孔压表现为先累积后消散,其变化规律与海床冲蚀失稳特征密切相关。Taking a three-dimensional sloping seabed in a sea area of Zhoushan as the prototype,a series of wave harbor basin tests were carried out to explore the pore pressure response,deformation and erosion failure characteristics of the three-dimensional clayey sloping seabed under wave action.The results show that when the wave height is small,the accumulation of excess pore pressure in the seabed of clay slope is not obvious,and most of it is oscillatory pore pressure.When the wave height increases gradually,a shallow failure occurs from the top of the clayey slope to its foot,and the clay debris accumulates obviously near the foot of the slope.The excess pore pressure in the seabed accumulates first and then dissipates,and its variation characteristics are closely related to the characteristics of seabed erosion instability.

关 键 词：波浪浅水化 三维黏质斜坡海床 孔隙水压力 冲蚀 失稳 

分 类 号：TU43[建筑科学—岩土工程] P73[建筑科学—土工工程]