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十万吨级码头所应用的钢管桩直径为1200毫米,壁厚14～19毫米,单管长达20米,重达9～12吨。用这样的三节单管相接成长达60米的长桩,其中定位焊缝的配置除能满足装配精度的要求以外,尚应满足吊运以及在滚轮支座上支撑所需抗弯强度的要求。长而重的圆形制品,如能掌握定位焊缝的配置方法与惯性矩或抗弯截面模量的关系,并计算出满足抗弯强度所需的最小惯性矩和抗弯截面模量,就可在满足吊运和在滚轮支座上支撑所需抗弯强度的条件下,将定位焊缝段数和尺寸减到最小程度。这不仅能够减小装配时间,而且有利于提高焊缝的质量,这对于提高自动埋弧焊、CO_2气体
Steel pipe piles used for one hundred thousand ton wharves have a diameter of 1200 mm and a wall thickness of 14-19 mm. The single pipe length is 20 meters and weighs 9-12 tons. With such three single-phase connection of up to 60 meters long pile, in which the positioning of the weld configuration in addition to meet the assembly accuracy requirements, should still be lifting and supporting the required bending strength of the roller bearing support requirements . Long and heavy round products, such as positioning weld can grasp the configuration and the relationship between the moment of inertia or flexural modulus, and calculate the flexural strength to meet the minimum required moment of inertia and flexural modulus, to The number and size of positioning welds can be minimized to meet the lifting and bending strength required to support the roller bearings. This not only reduces assembly time, but also help to improve the quality of the weld, which is to improve the automatic submerged arc welding, CO 2 gas