水下隧道主体结构混凝土裂缝控制技术  

Concrete Crack Control Technology for the Main Structure of Underwater Tunnels

作　　者：邵凯歌 王世帅 SHAO Kaige;WANG Shishuai(Qingdao Jinxin Sanlin Building Materials Co.,Ltd.;Qingdao Heda Engineering Construction Co.,Ltd.)

机构地区：[1]青岛金鑫三林建材有限公司 [2]青岛和达工程建设有限公司

出　　处：《广东建材》2025年第3期144-147,共4页Guangdong Building Materials

摘　　要：以某水下隧道为例,主体结构超长,浇筑混凝土体量大,底板、侧墙与顶板受制于工艺条件需分步浇筑,受混凝土不同步收缩应力和温度应力的影响,裂缝控制难度大。考虑材料、结构、环境、约束等因素,提出了新型水管联通系统的控裂技术路线,结合其他配套控裂措施进行现场实施应用。结果表明:新老混凝土结合面温差最优可控制在4℃左右,最大收缩应变控制在120×10^(-6)以内;混凝土入模温度控制在28℃以内;结合配套控裂措施在隧道主体结构进行了实施应用,混凝土无贯穿性裂缝产生。Taking a certain underwater tunnel as an example,the main structure is excessively long and the volume of poured concrete is large.The bottom plate,side walls,and top plate are subject to process conditions and need to be poured in stages.Due to the influence of asynchronous shrinkage stress and temperature stress of concrete,crack control is difficult.Taking into account factors such as materials,structure,environment,and constraints,a new crack control technology route for water pipe interconnection systems has been proposed,combined with other supporting crack control measures for on-site implementation.The results show that the optimal temperature difference between the new and old concrete interface can be controlled at around 4℃,and the maximum shrinkage strain can be controlled at 120℃×10^(-6);Control the temperature of concrete entering the mold within 28℃;Combined with supporting crack control measures,the main structure of the tunnel has been implemented and applied,and there are no penetrating cracks in the concrete.

关 键 词：水下隧道 温度平衡 入模温度控制 裂缝控制 

分 类 号：U459.5[建筑科学—桥梁与隧道工程]