长期服役高桩码头岸坡-结构体系侧向变形实测与数值模拟  

Lateral deformation measurement and numerical simulation of slope-structure system of high pile wharf in long-term service

作　　者：赵驰宇 李雨润 戴启权 李海锋 ZHAO Chiyu;LI Yurun;DAI Qiquan;LI Haifeng(School of Civil Engineering and Transportation,Hebei University of Technology,Tianjin 300400,China;Tianjin Research Institute for Water Transport Engineering,Tianjin 300456,China;Tianjin Port Yuanhang International Ore Terminal Co.,Ltd.,Tianjin 300452,China)

机构地区：[1]河北工业大学土木与交通学院,天津300400 [2]交通运输部天津水运工程科学研究所,天津300456 [3]天津港远航国际矿石码头有限公司,天津300452

出　　处：《水运工程》2024年第6期63-70,共8页Port & Waterway Engineering

基　　金：天津市交通运输科技发展计划项目(2022-43);中央级公益性科研院所基本科研业务费专项资金项目(TKS20220102)。

摘　　要：长期服役高桩码头的侧向变形会导致桩顶变位,进而影响桩帽与横梁之间的连接,使得码头的工程安全处于危险状态。依托天津港某长期服役码头,开展结构位移和地基深层土体水平位移长期监测,在监测结果的基础上开展数值模拟分析,研究长期服役高桩码头岸坡-结构体系在蠕变影响下土体水平位移、沉降以及桩身水平位移、沉降等相应规律,并且研究岸坡后方不同填土厚度对岸坡-结构体系侧向变形的影响。结果表明,土体蠕变是长期服役高桩码头岸坡-结构体系侧向变形的一个重要影响因素,土体的蠕变变形主要集中于后方堆场沉降和坡面表层淤泥质黏土的竖向位移。岸坡土体的蠕变速率随时间增大而减小。桩身的竖向位移从桩顶到桩底不断减小;码头结构的受力最不利位置处于桩顶附近,各排架桩基在水平位移方面差异明显,越靠内侧越大。随着填土厚度不断增大,岸坡-结构体系侧向变形不断增大。The lateral deformation of a long-term service high pile wharf leads to pile top dislocation,which affects the connection between the pile cap and the crossbeam,and put the engineering safety of the wharf in a dangerous state.Based on a long-term service wharf in Tianjin port,we carry out the long-term monitoring of structural displacement and deep soil horizontal displacement,and conduct the numerical simulation analysis based on the monitoring results to study the corresponding laws of soil horizontal displacement and settlement and pile horizontal displacement and settlement of the slope-structure system of long-term service high pile wharf under the influence of creep,and study the influence of different fill thickness behind the slope on the lateral deformation of the slope-structure system.The results show that soil creep is an important factor influencing the lateral deformation of the slope-structure system of the high pile wharf in long-term service,and the creep deformation of the soil is mainly concentrated in the settlement of the rear yard and the vertical displacement of the silty clay on the surface of the slope.The creep rate of the bank slope soil decreases with increasing time.The vertical displacement of the pile body decreases continuously from the top to the bottom of the pile;the most unfavorable position of the wharf structure is near the top of the pile,and the difference in horizontal displacement of each row of frame pile base is obvious,the more inward the pile is.With the increasing thickness of the fill,the lateral deformation of the slope-structure system increases continuously.

关 键 词：高桩码头 岸坡 长期服役 土体蠕变 位移 现场实测 数值分析 

分 类 号：U656.113[交通运输工程—港口、海岸及近海工程]