水位差法模拟波浪荷载作用下大直径圆筒稳定性离心模型试验研究  

Centrifugal model tests on stability of large-diameter cylinders under wave loads simulated by water-level difference method

作　　者：任国峰[1,2] 关云飞 周春儿[3] 顾行文 徐光明 REN Guofeng;GUAN Yunfei;ZHOU Chuner;GU Xingwen;XU Guangming(Geotechnical Engineering Department,Nanjing Hydraulic Research Institute,Nanjing 210029,China;The National Key Laboratory of Water Disaster Prevention,Nanjing 210029,China;Guangdong Province Planning and Design Institute for Water Transpotation Co.,Ltd.,Guangzhou 510050,China)

机构地区：[1]南京水利科学研究院岩土工程研究所,江苏南京210029 [2]水灾害防御全国重点实验室,江苏南京210029 [3]广东省航运规划设计院有限公司,广东广州510050

出　　处：《岩土工程学报》2024年第S01期27-31,共5页Chinese Journal of Geotechnical Engineering

基　　金：国家留学基金资助项目(202003340023);国家重点研发计划“交通基础设施”重点专项2023年度项目(2023YFB2604200)。

摘　　要：某人工岛护岸工程采用大直径圆筒结构,结构直径和高度尺寸较大,工程所处位置波浪条件恶劣。采用水位差法等效模拟波浪荷载,开展波浪荷载作用下大圆筒施工期稳定特性离心模型试验研究,结果表明,在25 a一遇波吸力荷载作用下,筒体位移模式近似平移,侧向位移量约353 mm,筒顶沉降约为187 mm,施工阶段钢圆筒整体稳定;筒壁环向拉应力均值约为90 MPa,处于钢圆筒材料允许应力范围内;筒壁海侧土压力值随水位差增大至峰值后趋于稳定,表明筒体与周围邻近土体之间没有新的相对位移趋势,大直径钢圆筒护岸结构在波浪荷载作用下是稳定安全的。A type of cylinder structure with large diameter and height is employed in an artificial island project subjected to harsh wave conditions.The centrifugal model tests on the stability of large cylinder under wave loads is carried out by using the water-level difference method to simulate the wave loads.The results show that the cylinder translates approximately under 25-year wave suction loads with the lateral displacement of 353 mm and the settlement of the cylinder top of 187 mm,respectively.The mean circumferential tensile stress of the cylinder wall during construction is about 90 MPa,which is within the allowable stress range of steel cylinder materials.The soil pressure at the sea side of the cylinder wall tends to be stable with the increase of the water-level difference to the peak value,indicating that there is no new relative displacement trend between the cylinder and the surrounding soils,and the large-diameter steel cylinder revetment structure is stable and safe under wave loads.

关 键 词：大直径圆筒结构 水位差法 离心模型试验 机理 稳定性 

分 类 号：TU41[建筑科学—岩土工程]