一种水下预埋封闭钢管置换岩塞体贯通既有水库施工技术探讨  

Research on the Construction Technology of Underwater Embedded Closed Steel Pipe Replacing Rock Blocking Body and Connecting Existing Reservoir

作　　者：周杜 杨遵俭 刘运雄 周海水 罗泽毅 ZHOU Du;YANG Zun-jian;LIU Yun-xiong;ZHOU Hai-shui;LUO Ze-yi(Hunan Construction Investment Group Co.,Ltd.,Changsha 410000,Hunan Province,China)

机构地区：[1]湖南建工集团有限责任公司,湖南长沙410000

出　　处：《中国农村水利水电》2023年第11期210-214,218,共6页China Rural Water and Hydropower

基　　金：湖南省住房和城乡建设厅建设科技计划项目(KY202210);湖南建工集团科技计划项目(JGJTK2021-24)。

摘　　要：针对取水工程取水口施工采用常规的施工技术受环境条件和地质条件制约大,且环境污染大、施工工期长、施工投入高、需要大型设备及船舶等问题,该施工技术创造性的改变了传统的先内后外的施工顺序,通过预埋水下封闭钢管置换岩塞体,通水时间不受汛期滞约,利用浮箱水上平台进行取水口管槽水下开挖、预埋钢管下沉就位、水下混凝土包封固定取水口钢管以及防渗、岸坡恢复等一系列工艺措施,用预埋钢管置换了岩塞体,使贯通变成了只是简单的水下静水切割钢管盲板,不仅确保了取水口贯通质量,施工安全,库区蓄水正常运行而且对施工区周边环境和既有构筑物基本无影响。For the water intake construction using conventional construction methods by environmental conditions and geological conditions constraints,and environmental pollution,long construction period,high construction investment,the need for large equipment and ships and other problems,the construction technology creatively changes the traditional first inside and then outside the construction sequence,through the pre-buried underwater closed steel pipe to replace the rock plug body,water access time is not subject to the flood lag,the use of floating box water platform for taking the mouth of the pipe trough underwater excavation,pre-buried steel pipe sinking in place,underwa⁃ter concrete encapsulation fixed take the mouth of the steel pipe and seepage,shore restoration and a series of process measures,with preburied steel pipe replacement of the rock plug body,not only to ensure the quality of the mouth of the penetration,construction safety,nor⁃mal operation of the reservoir storage and the construction area surrounding environment and existing structures basically no.The construc⁃tion area is not only safe but also has no impact on the surrounding environment and existing structures.

关 键 词：取水口 预埋钢管 置换岩塞体 不分散混凝土 防渗透注浆 

分 类 号：TV213.4[水利工程—水文学及水资源]