施工技术
施工技術
시공기술
Construction Technology
2015年
18期
1-4
,共4页
混凝土%桥梁工程%大体积混凝土%浇筑温度%温度控制
混凝土%橋樑工程%大體積混凝土%澆築溫度%溫度控製
혼응토%교량공정%대체적혼응토%요축온도%온도공제
concrete%bridges%mass concrete%pouring temperature%temperature control
通过对大体积混凝土温度裂缝产生原因的分析，结合海工混凝土性能要求及厦漳跨海大桥工程特点，研究海洋环境下大体积混凝土温控关键技术。根据现场工况，对不同类型的海工大体积混凝土进行温控计算并制定相应温控措施，即优化海工混凝土配合比、控制混凝土浇筑温度、改善混凝土施工性能、通循环冷却水对混凝土进行内部降温、采取表面保温保湿养护措施等。编制可操作性强的温控施工方案以指导全桥大体积混凝土温控施工，对主桥承台、塔柱、引桥承台等关键构件进行现场温度监控指导，根据测温结果及时调整温控措施，有效控制海洋环境下混凝土有害温度裂缝的产生。
通過對大體積混凝土溫度裂縫產生原因的分析，結閤海工混凝土性能要求及廈漳跨海大橋工程特點，研究海洋環境下大體積混凝土溫控關鍵技術。根據現場工況，對不同類型的海工大體積混凝土進行溫控計算併製定相應溫控措施，即優化海工混凝土配閤比、控製混凝土澆築溫度、改善混凝土施工性能、通循環冷卻水對混凝土進行內部降溫、採取錶麵保溫保濕養護措施等。編製可操作性彊的溫控施工方案以指導全橋大體積混凝土溫控施工，對主橋承檯、塔柱、引橋承檯等關鍵構件進行現場溫度鑑控指導，根據測溫結果及時調整溫控措施，有效控製海洋環境下混凝土有害溫度裂縫的產生。
통과대대체적혼응토온도렬봉산생원인적분석，결합해공혼응토성능요구급하장과해대교공정특점，연구해양배경하대체적혼응토온공관건기술。근거현장공황，대불동류형적해공대체적혼응토진행온공계산병제정상응온공조시，즉우화해공혼응토배합비、공제혼응토요축온도、개선혼응토시공성능、통순배냉각수대혼응토진행내부강온、채취표면보온보습양호조시등。편제가조작성강적온공시공방안이지도전교대체적혼응토온공시공，대주교승태、탑주、인교승태등관건구건진행현장온도감공지도，근거측온결과급시조정온공조시，유효공제해양배경하혼응토유해온도렬봉적산생。
This paper studies the key technologies of temperature control of mass concrete in the marine environment through analyzing the causes of temperature cracks of mass concrete, combined with the requirements of marine concrete and the characteristics of Xiamen—Zhangzhou sea-crossing bridge. According to the site condition, the mass concrete temperature control is calculated and the corresponding temperature control measures are formulated for different types of mass marine concrete, namely the optimization of the mix proportion of the marine concrete, controlling the pouring temperature of concrete, improving the performance of concrete construction, using circulating cooling water to cool the internal concrete, adopting surface insulation moisture maintenance measures, etc. Preparation of temperature control construction plan which has strong operability to guide the whole bridge construction, doing in-site temperature monitoring guidance for the key components such as the pile caps and pillars of main bridge and the pile caps of approach bridge, adjustment temperature control measures timely according to the results of the temperature measurement, to effectively control the formation of harmful temperature cracks of concrete in the marine environment.
