圆形顶管的内力计算探讨

摘要

An exhaustive study of load kinds and inner forces about circular jacking pipe which including flexibility pipe ( steel pipe, glass fiber reinforced thermosetting resin mortar pipe ) and rigidity pipe ( reinforced concrete pipe ) were discussed in this paper. Then inner forces ( bending moments and axial forces) calculatwnal factor under action of each load combinations were given out. These factors can be applied conveniently in the engineering design. The writers consider that circular jacking pipe is a free deformation circular ring structure in the soil medium. The assumption 120° bear angle support is no existence.%本文详细地探讨了柔性管道(钢管、玻璃纤维增强塑料夹砂管)、刚性管道(钢筋混凝土管)顶管的受荷种类及内力分析,给出各组荷载作用下的内力(弯矩、轴力)计算式,可供工程设计使用.文中明确指出,圆形项管管体为土层介质中的自由变形圆环结构,不存在120°支承角支座.