冻结管断裂位置的确定

立井冻结法施工中 ,冻结管因受到冻结压力、弯曲应力及摩擦力等力的作用 ,经常会发生冻结管破裂、透水淹井等事故。为了解决这类问题 ,依据经典力学的基本理论 ,通过对冻结管的受力分析 ,建立了冻结管的强度准则 ,找出了冻结管最可能发生断裂的理论位置 ,并举例说明了该理论的正确性和适用性 ,对工程设计及施工现场具有较大的指导意义

ANALYSIS OF FRACTURE STRESS FOR FROZEN STEEL PIPE

In shafts constructed by frozen method, the accidents of fracture of frozen steel pipe and saturating water of shaft frequently happen due to the action of frozen force stress, bending stress, friction and so on. In order to solve this kind of problem, the frozen steel pipe is analyzed on the basis of the theory of classic mechanics. The strength norm of the frozen steel pipe is obtained and the theoretic site of the most possible fracture of the frozen steel pipe is found up. The theory's rightness and applicability is explained by example. It is of a guiding significance to engineering design and field construction.