水电站厂房基坑全年胶凝砂砾石围堰设计  

Design of all-year cemented sand-gravel cofferdam for hydropower station powerhouse foundation pit

作　　者：冯西杰 王小波 周顺文 FENG Xijie;WANG Xiaobo;ZHOU Shunwen(POWERCHINA Chengdu Engineering Corporation Ltd.,Chengdu 611130,China)

机构地区：[1]中国电建集团成都勘测设计研究院有限公司,四川成都611130

出　　处：《水利水电快报》2025年第4期71-76,共6页Express Water Resources & Hydropower Information

摘　　要：为了进一步研究胶凝砂砾石围堰在雅砻江某水电站应用的可行性,综合考虑该水电站枢纽区地形地质条件、工程布置、施工特点等因素,通过综合经济技术分析,对初拟厂房基坑全年围堰的土石围堰和胶凝砂砾石围堰方案进行了比选;通过计算分析,进一步优选了胶凝砂砾石围堰上下游坡比。结果表明:与土石围堰相比,胶凝砂砾石围堰在料源获取、施工条件、工程占地和工程投资等方面具有一定优势,优选断面可满足设计要求。研究成果可为类似工程的设计提供借鉴。In order to further study the feasibility of using cemented sand-gravel cofferdam in a hydropower station on the Yalong River,according to the topographic and geological conditions,engineering layout and construction characteristics of the hydropower station,the earth-rock cofferdam and cemented sand-gravel cofferdam schemes were compared for the initially proposed all-year cofferdam of the powerhouse foundation pit through a comprehensive economic and technical analysis.Through calculation analysis,the upstream and downstream slope ratio design scheme of the cemented sand-gravel cofferdam was further optimized.The results showed that compared with earth-rock cofferdam,the layout scheme of the cemented sand-gravel cofferdam has certain advantages in terms of material source acquisition,construction conditions,project land occupation,and project investment,and the selected optimal section can meet the engineering design requirements.The research result can provide a references for the design of similar projects.

关 键 词：厂房基坑 围堰 堰基防渗 胶凝砂砾石 雅砻江 

分 类 号：TV551.3[水利工程—水利水电工程]