摘要
船闸闸室墙在中间浮式系船柱附近的混凝土易产生裂缝,影响船闸工程整体稳定性。通过对闸室混凝土的温度应力展开仿真分析和实际船闸工程混凝土裂缝调研,发现整浇闸墙中间系船柱附近和上下游侧墙中间下部混凝土在施工期易产生竖向裂缝。因此,考虑闸墙中部采用后浇带的方式,并且比较了后浇带不同施工方案,发现采用后浇带能降低闸室上下游侧墙混凝土的最大主应力,防止裂缝的产生;但仅采用后浇带的方式,会导致中间浮式系船柱附近的后浇混凝土开裂风险增加;因此,可通过改变后浇带浇筑顺序和采用微膨胀混凝土的方式,提高中间浮式系船柱附近混凝土的抗裂能力。
The ship lock wall is prone to cracks in the concrete near the middle floating bollard,which affects the overall stability of the ship lock project.The temperature stress of the lock chamber concrete were studied through the simulation analysis and the actual ship lock engineering of concrete cracks were investigated.It was found that vertical cracks were easily formed in the concrete near the middle bollard of the cast-in-place lock wall and in the middle of lower parts of the upstream and downstream side walls during the construction period.Therefore,the method of post-caste concrete in the middle of the ship lock wall was considered,and different construction schemes of post-caste concrete were compared.Then it was found that the use of post-caste concrete could reduce the maximum principal stress of the upstream and downstream side walls of the shiplock chamber and prevent the occurrence of cracks.And using the method of post-caste concrete would increase the risk of cracking of the post-cast concrete near the intermediate floating bollard.While changing the pouring sequence of the post-cast concrete and adopting micro-expansion concrete could improve the crack resistance of the concrete near the intermediate floating bollard.
作者
徐路
覃茜
阮永刚
祁勇峰
孙新峰
XU Lu;QIN Xi;RUAN Yonggang;QI Yongfeng;SUN Xinfeng(Anhui Province Group Limited for Yangtze-to-Huaihe Water Diversion,Hefei 230092,Anhui,China;Research Center of Water Engineering Safety and Disaster Prevention of Ministry of Water Resources,Changjiang River Scientific Research Institute,Wuhan 430010,Hubei,China;China State Construction Engineering Corporation,Qingdao 266033,Shandong,China)
出处
《水利水电技术（中英文）》
北大核心
2023年第S01期41-46,共6页
Water Resources and Hydropower Engineering
基金
安徽省引江济淮集团有限公司科技项目(YJJH-ZT-ZX-20190823179)
国家自然科学基金项目(52009011)
湖北省自然科学基金(2021CFB154)。
关键词
闸墙
浮式系船柱
后浇带
分层浇筑
温度应力
lock wall
floating bollard
post-pouring strip
layered pouring
thermal stress
