【摘要】 针对目前水电站地下厂房尾水岔管混凝土施工不能实现整体连续浇筑的技术难题,提出了无支架混凝土施工方法。基于流体力学原理和薄壳结构变形规律,建立了尾水岔管混凝土浇筑无支架钢衬液压理论,以钢衬薄壳最低点各种荷载产生的法向压力之和为零的平衡条件,确定了尾水岔管钢衬灌注液体深度与浇筑混凝土高程的解析关系,实现了薄壳钢衬受载后环向应力始终处于微拉应力状态,避免了钢衬簿壳环向受压产生屈曲失稳的风险;并有效地保障了尾水岔管混凝土浇筑过程中薄壳钢衬作为模板要求的刚度与强度。更多还原

【Abstract】 So far,the concrete of the water tail branch pipe of workshop building underground in water power station can’t be continuous poured. In order to solve the problem,a new building technique in which the fixed mount isn’t necessary was suggested. Based on the principle in fluid mechanics and deforming law of shell structure,a theory of equilibrium on hydraulic pressure acting on the form board without fixed mount was established.The theory will be used to investigate continuous pouring the concrete. And according the theory,the relationship between the depths of the fluid filled in the steel liner of tail water branch pipe and the height of the concrete poured was also suggested.更多还原