堆场堆载作用下岸坡及高桩码头响应特性研究  

Study on the characteristics of bank slope and pile-supported wharf under yard loads

作　　者：周峰[1] 汪振 戴启权 聂智超 ZHOU Feng;WANG Zhen;DAI Qiquan;NIE Zhichao(Tianjin Port(Group)Co.Ltd.,Tianjin 300461,China;Tianjin Research Institute for Water Transport Engineering,Ministry of Transport,Tianjin 300456,China)

机构地区：[1]天津港(集团)有限公司,天津300461 [2]交通运输部天津水运工程科学研究所,天津300456

出　　处：《水道港口》2024年第5期739-746,共8页Journal of Waterway and Harbor

基　　金：国家重点研发计划项目(2022YFB3207400);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科研创新基金项目(TKS20220207)。

摘　　要：堆场长期堆载会导致软土发生明显变形,影响岸坡稳定并威胁临近码头结构在运维期的安全性。以天津港高桩码头结构为工程背景,建立软土、高桩码头与荷载的三维有限元分析模型,研究了堆场堆载作用下软土岸坡及高桩码头结构响应特性。研究结果表明:堆场堆载会导致地表出现明显沉降变形,同时接岸结构下方软土会发生侧向运动;后承台靠近堆场处的桩基会发生显著的水平变形并在顶部产生明显的弯矩响应,易于导致桩帽位置处混凝土开裂损伤;堆载宽度的减小对土体与结构的位移峰值影响较小,但会显著影响堆场土体的沉降范围;在后承台无堆载工况下,桩帽与上部结构间会出现相对滑移,易于造成构件之间的错位破损。Long-term loading of the yard can lead to significant deformation of the soft soil,affecting the stability of the bank slopes and threatening the safety of the adjacent wharf structures during the operation and maintenance period.Based on the engineering prototype of a typical pile-supported wharf in Tianjin port,the three-dimensional finite element analysis model considering soft soil,pile-supported wharf and loading was developed.The structural response characteristics of soft soil and pile-supported wharf under yard loads were investigated.The results show that yard loads can lead to significant settlement of the ground surface,as well as lateral movement of soft soils underneath the shore connecting structure.The piles on the rear platform undergo significant horizontal deformation and generate significant bending moment response at the top,which can lead to concrete cracking damage at the pile cap.The reduction in width of yard loads has a small effect on the peak displacements of the soil and structure,but significantly affects the settlement range of the soil.Relative slip between the pile cap and the superstructure occursin the absence of heaped loads on the rear platform,which can cause misalignment and breakage between the members.

关 键 词：高桩码头 软土 堆场堆载 岸坡体系 结构响应 

分 类 号：U656.1[交通运输工程—港口、海岸及近海工程]