Research On Security Influence Of Slope Creep On Piled Wharf Under Long-term Surcharge Loading

The slope creep,influencing the inland river suspended vertical frame wharf structure with big water level,has attracted great attention of engineering field.Especially to the high-cut bedding slope with Soft soil covering,slope will causes lateral deformation with obvious character of rheology under the backfill and Long-term Surcharge Loading on the rear yard of slope.Extrudingly,numerous horizontal pressure appears on the piles and leads the piles lateral deformation obviously.Meanwhile,allvertical-pile will to be "passive" pile and easily generate potential safety hazard with lateral deformation and moment increasing.To make sure the regular operation of inland wharf,it's necessary to carry out research on security influence of slope creep on piled wharf under long-term surcharge loading.(1)Aim to soft soil creep characteristics under long-term surcharge loading,paper develops Base on Chongqing Wulong Baima Wharf.Research obtains the material creep parameter by conducting creep experiments throuth site sanpling.The paper develop the three-dimensional finite element soil creep model to elaborate interaction between the pile and high-cut bank slope under single syntagme wharf by the finite element analysis software ABAQUS.(2)The creep analysed theory is differentiated as coupled model combining linear Drucker-Prager theory with Singh-Mitchell creep theory.Meanwhile,paper compare elastic-plastic model to externalize creep characteristics and working mechanism of the high and steep slope from the standpoint of dissipation of energy and mechanical property,later grasp the essence of pile-soil coupling interaction and the effect of creep soft soil accurately.(3)Finally,aim to security influence of the piles,paper analyses law of mechanical parameters vary with time,influenced by lateral deformation of the natural high-cut bedding slope under long-term surcharge loading,such as the displacements and moment of wharf pile.Meanwhile,paper considers pile's bending moment and displacement perpendicularity as security parameters,focusing on the coupling factor of the relative stiffness,like creep parameters,soil properties,load size,structure of shore slope,to research influence on the mechanical properties and security of pile.The results show,soft soil creep display Attenuation-stable characteristics,bending moment curve forms "S" type distribution,the horizontal displacement gradually increases with the height of the pile,pile security affected by multiple factors,the numerical simulation can be better combined with the actual situation to study the stability and rationality of wharf pile under pile-soil coupling interaction.It could provides reference and experiences for wharf construction design.