整体式闸首底板施工宽缝位置及合缝时间对底板的受力影响  

Influence of position and jointing time of wide construction joints on stress of integral lock head bottom plate

作　　者：杨旭[1] 宁庆臣 YANG Xu;NING Qingchen(CCCC-FHDI Engineering Co.,Ltd.,Guangzhou,510290,China)

机构地区：[1]中交第四航务工程勘察设计院有限公司,广东广州510290

出　　处：《水运工程》2024年第8期323-328,共6页Port & Waterway Engineering

摘　　要：针对我国船闸规范中未对闸首底板设置施工宽缝的相关理论进行规定的问题,本文通过对浙江某船闸工程的案例进行研究,采用ANSYS有限元软件,对设置施工宽缝和未设置施工宽缝两种结构模型进行数值分析,研究施工宽缝的位置及合缝时间对底板受力的影响。研究结果表明:底板的负弯矩随宽缝位置由底板两侧向中间变化而减小,底板的负弯矩随合缝时间的推迟而减小,在设计中应在考虑施工便利等相关因素前提下,尽量使宽缝靠近底板中间轴线,并选择在边墩完成总沉降的60%~80%时进行合缝,以降低弯矩,实现最大的综合效益。为施工宽缝的底板理论研究提供有益的参考,有助于规范设计和施工实践。To the issue that relevant theory of setting wide construction joints for the bottom plate of the lock head in China's ship lock regulations is not specified,this paper investigates a case of the ship lock project in Zhejiang province.ANSYS finite element software is used to numerically analyze two structural models with and without construction wide joints.The aim is to explore the influence of the position and jointing time of wide construction joints on the stress of the bottom plate.The research results indicate that the negative bending moment of the bottom plate decreases as the position of the wide joint changes from both sides towards the middle of the bottom plate,and decreases with the delay of joint time.In the design,it is necessary to consider factors such as construction convenience,and try to make the wide joint close to the middle axis of the bottom plate as much as possible.The joint should be selected when the side pier completes 60%to 80%of the total settlement to reduce the bending moment and achieve maximum comprehensive benefits.This research provides valuable reference for the theoretical study of wide construction joints in bottom plate,and helps to standardize design and construction practice.

关 键 词：闸首底板 施工宽缝 合缝时间 生死单元 ANSYS软件 

分 类 号：U65[交通运输工程—港口、海岸及近海工程]