The position of tensile region of the section at mid-supports goes down as the span-depth ratio reduces.
中间支座截面受拉区的位置随着跨高比的减小而下移；
It is suggested that the span-depth ratio of wall-bearing transfer beam should be less than 8 in seismic design, 10 in static design for SRC structure.
建议一般型钢混凝土托墙转换梁的允许跨高比在抗震设防时不大于8，对非抗震设计工程，跨高比不大于10；
At the same time, the stability of big-span tunnel with influence factor such as section size, high-span ratio and depth is studied.
同时，论述了大跨度隧道的稳定性以及断面尺寸、扁平率和隧道埋深对稳定性的影响。
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