The stress characteristics of non-equal length double-row steel sheet piles in coastal pits under wave action
Considering the influence of wave action,the offshore pit project is often supported by non-equal length double-row steel sheet piles,and the existing double-row pile calculation model is not applicable to the calculation of internal force and deformation of such structures.In order to investigate the influence of wave action on the internal force and deformation of this kind of supporting structure according to its loading and arrangement characteristics,the calculation method of pile-soil force,the soil pressure distribution mode of front and back rows of piles,and the form of constraints in the existing calculation model are improved,and the calculation model of non-equal length double-row sheet pile is proposed,which is validated by comparing with the results of finite element,and the influence of wave action on the structural deformation of non-equal length double-row sheet pile structure is analyzed.The results show that:(1)When there is no wave action,the peak bending moment of the piles on the pit side(front)is about twice that of the piles on the seaward side(back),and the bending moments of the piles on the front and back rows are distributed in a parabolic and S-shape,respectively;(2)When there is no wave action,the horizontal displacements of the piles on the front and back rows are,respectively,showing"logarithmic function"and"linear function"type distributions,but the peaks of the horizontal displacements of the piles on the front and back rows are equal and both appear at the top of the pile;(3)Under the action of wave crest,the bending moment and horizontal displacement law of the front and back row piles are basically the same as those without wave,but the maximum values of bending moment and horizontal displacement increase by about 121％and 87％,respectively;(4)The maximum values of bending moment and horizontal displacement of the front and back piles are significantly reduced under the wave trough,but there is no big difference in the distribution of the two piles compared with the no wave condition.
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万方数据
维普
