CAJ | 학술논문

现代桥梁不断向大跨度、高耐久性、使用安全方向发展,对桥梁工程主要材料混凝土的强度、耐久性、工作性、体积稳定性、经济性等各项性能指标提出了更高的要求。拉萨高海拔地区气候独特,昼夜温差大、日照时间长、地震频率高,混凝土的原材料在质量上或级配上存在很大的不稳定性,文章结合拉萨纳金大桥工程,对其主梁采用的特殊配合比的高性能混凝土进行试验研究和配合比优化,有效地保证了工程质量。
현대교량불단향대과도、고내구성、사용안전방향발전,대교량공정주요재료혼응토적강도、내구성、공작성、체적은정성、경제성등각항성능지표제출료경고적요구。랍살고해발지구기후독특,주야온차대、일조시간장、지진빈솔고,혼응토적원재료재질량상혹급배상존재흔대적불은정성,문장결합랍살납금대교공정,대기주량채용적특수배합비적고성능혼응토진행시험연구화배합비우화,유효지보증료공정질량。
The modern bridges are built as per the direction of long-span,high durability,and service Safety.It has higher requirements in concrete performance indexes including strength,durability,workability,volume stability,economic efficiency and so on.The raw materials for concreting at high altitude in Lhasa have great instability in concrete gradation and material quality.There is great instability of the raw materials in gradation and quality.Combined with unique climate of high altitude area in Lhasa,large temperature difference between day and night,long sunshine time,high frequency of earthquakes,it is suggested to build the main tower and main girder of Najin Bridge with high performance concrete of special gradation.Through experimental study on high performance concrete,it is feasible to apply high performance concrete for main tower and main girder of Najin Bridge construction and it will effectively control the engineering quality.