胶凝砂砾石过水围堰填筑材料特性研究  

Study on Material Characteristics of Cement-Sand-Gravel Overflow Cofferdam

作　　者：戈雪良[1,2] 陆采荣 张金海[4] 梅国兴 刘伟宝 王珩[1,2] 杨虎 GE Xueliang;LU Cairong;ZHANG Jinhai;MEI Guoxing;LIU Weibao;WANG Heng;YANG Hu(Nanjing Hydraulic Research Institute, Nanjing 210029, Jiangsu, China;State Key Laboratory of Hydrology, Water Resources and Hydraulic Engineering,Nanjing 210029, Jiangsu, China;R & D Center of Hydropower Engineering Safety and Environmental Technology, NEA, Nanjing 210029, Jiangsu, China;Huaneng Lancang River Hydropower Co . , Ltd . , Kunming 650214, Yunnan, China)

机构地区：[1]南京水利科学研究院,江苏南京210029 [2]水文水资源与水利工程科学国家重点实验室,江苏南京210029 [3]国家能源水电工程安全与环境技术研发中心,江苏南京210029 [4]华能澜沧江水电股份有限公司,云南昆明650214

出　　处：《水力发电》2019年第6期46-49,55,共5页Water Power

基　　金：国家重点研发计划(2018 YFC0406804);中央级公益性科研院所基本科研业务专项基金项目(Y417004)

摘　　要：大华桥水电站上游过水围堰采用坝址区附近河床天然砂砾石及工程开挖弃渣料作为骨料配制胶凝砂砾石材料,骨料最大粒径250mm。针对河床天然砂砾料含砂量波动大、含泥量较高的特点,系统研究了20%~35%含砂量范围内,胶凝砂砾石材料水胶比、单位用水量、砂率、28d抗压强度之间的关系,并提出了满足材料性能设计要求的水胶比、单位用水量等关键配合比参数控制范围。基于现场碾压工艺试验,提出了250mm大粒径胶凝砂砾石材料碾压施工关键工艺参数。The natural sand and gravel near the dam site and the excavated slag are used as aggregates for the construction of upstream cement-sand-gravel overflow cofferdam of Dahuaqiao Hydropower Station with a maximum aggregate particle size of 250 mm. As the natural sand and gravel material in river bed has large fluctuation of sand content and high mud content, the relationship between water-cement ratio, water consumption per unit, sand ratio and 28 d compressive strength of cement- sand-gravel material in the range of 20%-35% sand content is systematically studied , and the control range of key mix parameters such as water-cement ratio and water consumption per unit which meet the requirements of material performance design is put forward. Based on in-situ rolling process test, the key technological parameters of 250 mm-size cement-sand-gravel material rolling construction are put forward.

关 键 词：胶凝砂砾石 过水围堰 配合比控制参数 碾压工艺参数 

分 类 号：TV43[水利工程—水工结构工程] TV551.36