Discussion about strength of pre-stressed pipe pile welded joints in common construction activities

摘要

In order to analyze reliability for strength of pre-stressed pipe pile welded joints in common construction activities, perform checking calculation to welded joint strength in various construction activities with the weld check formula in consideration of the influence coefficient of the eccentrically loaded end plate, compare with the shear strength of the pipe pile end plate porthole and the tensile strength of the steel bar pier head, and analyze from overall safety of pipe pile application before obtain the conclusion: the strength of the weld joint made according to relative codes is far more than the strength of the weak part of the pipe pile, but some severe weld defects will make weld joint become the first part to be damaged. One recommendation is increase the joint strength between the anchorage hole of the pipe pile end plate and the pre-stressed steel bar pier head; the other is to make the new welding construction specifications for pipe pile joint, improve requirements to joint welding construction, reduce welding duration, reduce working strength and improve welding quality stability.