摘要
针对韩江榕江练江水系连通后续优化工程中超深地下连续墙施工面临的水下环境混凝土材料易分散、强度劣化等技术难题,以提升水下不分散混凝土性能与施工质量为目标,开展水下不分散混凝土配合比优化试验。研究结果表明,当抗分散剂掺量为3.0%、粉煤灰掺量为15%及水胶比为0.41时,水下不分散混凝土可兼具较优的工作性能及水陆抗压强度比。综合采用混凝土配合比优化、法兰密封管节应用、水下监测仪布设等措施和设备,有效解决了墙体质量不均、堵管、导管埋深控制难等施工问题,显著提高了超深地下连续墙的施工质量与效率。该研究成果可为水下不分散混凝土的相关研究与类似工程施工提供参考。
In view of the technical problems such as easy dispersion and strength deterioration of concrete materials in underwater environment in the construction of ultradeep underground diaphragm wall in the follow-up optimization engineering of Hanjiang River,Rongjiang River and Lianjiang River water system connection,this paper conducts underwater nondispersing concrete mixture proportion optimization test with the goal of improving the performance and construction quality of underwater nondispersing concrete.The research results show that when the dosage of anti-dispersing agent is 3.0%,the dosage of fly ash is 15%and the water to binder ratio is 0.41,the underwater nondispersing concrete can have better working performance and water-to-land compressive strength ratio.By comprehensively adopting measures and equipment such as concrete mixture proportion optimization,flange sealed pipe section application,underwater monitor layout,etc.,the construction problems such as uneven wall quality,pipe plugging,and difficult control of conduit burial depth are effectively solved,and the construction quality and efficiency of ultra-deep underground diaphragm wall are significantly improved.The research results can provide reference for the related research on underwater nondispersing concrete and the construction of similar engineering.
作者
李娜娜
刘穗虎
钟哲
LI Nana;LIU Suihu;ZHONG Zhe(Guangdong Construction Engineering Group Co.,Ltd.,Guangzhou 511340,Guangdong,China;Guangdong Engineering Technology Research Center of Water Resources and Hydropower,Guangzhou 511340,Guangdong,China;Guangdong Engineering Technology Research Center of Water Conservancy New Materials and Structures,Guangzhou 511340,Guangdong,China)
出处
《工程技术研究》
2025年第19期100-103,共4页
Engineering and Technological Research
关键词
水下不分散混凝土
超深地下连续墙
水胶比
施工工艺
underwater nondispersing concrete
ultra-deep underground diaphragm wall
water to binder ratio
construction process
