Steel tube composite pile and design method thereof

Abstract

The invention discloses a steel tube composite pile and a design method thereof. The design method of the steel tube composite pile comprises the steps that the rigidity, the vertical bearing capacity and the horizontal bearing capacity of the steel tube composite pile are calculated; the steel tube composite pile meeting the requirement for the rigidity, the vertical bearing capacity and the horizontal bearing capacity is designed according to the obtained rigidity, the obtained vertical bearing capacity and the obtained horizontal bearing capacity of the steel tube composite pile. The steel tube composite pile comprises a steel tube, shearing rings, an ant-corrosion coating, a slurry cake and a steel concrete pile body. The design method is suitable for calculating the internal strength ultimate bearing capacity of the steel tube composite pile with the common action of the slurry cake, the anti-corrosion coating and the shearing rings, and positive application value for the calculation of the internal strength ultimate bearing capacity of the steel tube composite pile with the slurry cake, the anti-corrosion coating and the shearing rings is achieved.

Description

technical field [0001] The invention relates to the field of deep-sea bridge pile foundation engineering, in particular to a steel pipe composite pile and a design method thereof. Background technique [0002] With the continuous development of the national economy and the continuous increase in steel production, large-diameter steel pipe composite piles are widely used in cross-sea bridges, In major projects such as large deep-water port terminals. [0003] Although composite steel pipe piles have been widely used, there is no calculation method for the design and calculation of steel pipe composite piles considering the effects of mud skin, anti-corrosion coating and shear ring in pile foundation codes at home and abroad. When the ultimate bearing capacity of steel pipe composite piles is calculated according to the internal strength control standard, the calculation results are different from the actual situation when the existing relevant codes are used for calculation....

AI Technical Summary

Problems solved by technology

When the calculation result is too large, the pile foundation is too unsafe; when the calculation result is too small, it will cause waste of materials and increase the cost

[0004] So far, the influence of the shear ring embedding effect of the inner wall of the steel casing and the weakening effect of mud skin / anti-corrosion coating in the pipe on the steel pipe composite pile

At present, the domestic design codes and technical regulations of concrete filled steel pipe structures basically use the constraint effect coefficient (ζ 0 ) to consider the interaction between steel pipe and concrete, the strength bearing capacity N 0 and flexural capacity M 0 The expression of is determined based on the results of large-scale parametric analysis, without considering the strengthening effect of the shear ring and the weakening effect of mud skin / anti-corrosion coating on the CFST structure

In particular, there are unsafe and unreliable technical risks in the design and use of steel pipe composite piles for deep sea bridges

Images