The practical space analysis method is brought forward according to characters of acting forces and the large rectangular aqueduct bridge with multi-longitudinal beams.

• 摘要本文根据大型多纵梁矩形渡槽槽身结构及其受力特点，提出实用空间分析法，使复杂的空间结构计算分离成相互联系的两个平面问题。