水电与新能源
水電與新能源
수전여신능원
HYDROPOWER AND NEW ENERGY
2013年
4期
24-26,32
,共4页
小湾水电站%水垫塘%抗冲耐磨混凝土%施工技术
小灣水電站%水墊塘%抗遲耐磨混凝土%施工技術
소만수전참%수점당%항충내마혼응토%시공기술
The Xiaowan Hydropower Station%water cushion pool%scour resistance concrete%construction technique
针对小湾水电站坝后水垫塘抗冲耐磨混凝土施工，工程量大，设计标号高，水胶比小，外掺材料多，跨高温、雨季，且抗冲耐磨混凝土粘稠性强，易发干发白、产生干缩裂缝，混凝土振捣困难，抹面平整度难以控制等特点，提出了混凝土配合比优化设计，混凝土拌和，过流面表面不平整处理，早期塑性干缩预防，后期收缩裂缝、温度裂缝预防，雨季施工防雨等措施，保证了施工质量和进度，取得了良好的社会经济效益。
針對小灣水電站壩後水墊塘抗遲耐磨混凝土施工，工程量大，設計標號高，水膠比小，外摻材料多，跨高溫、雨季，且抗遲耐磨混凝土粘稠性彊，易髮榦髮白、產生榦縮裂縫，混凝土振擣睏難，抹麵平整度難以控製等特點，提齣瞭混凝土配閤比優化設計，混凝土拌和，過流麵錶麵不平整處理，早期塑性榦縮預防，後期收縮裂縫、溫度裂縫預防，雨季施工防雨等措施，保證瞭施工質量和進度，取得瞭良好的社會經濟效益。
침대소만수전참패후수점당항충내마혼응토시공，공정량대，설계표호고，수효비소，외참재료다，과고온、우계，차항충내마혼응토점주성강，역발간발백、산생간축렬봉，혼응토진도곤난，말면평정도난이공제등특점，제출료혼응토배합비우화설계，혼응토반화，과류면표면불평정처리，조기소성간축예방，후기수축렬봉、온도렬봉예방，우계시공방우등조시，보증료시공질량화진도，취득료량호적사회경제효익。
Some difficulties has been encountered in the scour resistant concrete construction of water cushion pool in Xiaowan Hydropower Station: large construction quantity with high design grade , small ratio of water and gel , many mixed materials, high-temperature rainy season , thick abrasion-resistant concrete easy to dry and white which leads to dry shrinkage crack , difficult concrete vibrator and uneven surface .Measures such as optimization design , concrete mix-ing, flow surface roughness treatment , plastic shrinkage prevention in early stage , shrinking and temperature cracks pre-vention in later stage , rain proof in rainy season are proposed in order to ensure construction quality and progress and to achieve good social and economic benefits .
