Simulation testing and theoretical analysis were made to study generating mechanics and moving evolutionary process of "granular arch" structure of upper immediate roof in top coal caving.
通过相似模拟实验和理论分析，研究了综放条件下上位直接顶“散体拱”结构的形成机理和移动演化过程。
RC-masonry combination arch bridge makes rc arch ribs as former spanning structure and falsework of upper masonry's construction. Finally, reinforced concrete and masonry together form arch ring.
它提出了以RC拱肋作为先期的跨越结构和后期高强石砌体砌筑的施工支架，最终由石砌体和RC拱肋共同形成主拱圈的构思。
The paper introduced the characteristics of rigid frame arch bridge, by upper and lower structure calculation, proposed its compound-simple calculation.
介绍了刚架拱桥的特点并通过上、下部结构计算，提出了对拱腿水平力影响线图和斜撑水平力影响线图进行合成简化计算。
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