Collapsible Loess of Bridge Pile Foundation Under Vertical Load Bearing Characteristics Research

Settlement of collapsible loess structure is very special,it has the characteristics of discontinuity,sudden,irreversible,so often a threat to the bridge pile foundation. How do you determine the collapsibility loess deformation of bridge pile foundation under vertical load bearing characteristics has been plagued by scholars at home and abroad. According to predecessors' research status,the xinjiang highway bridge of collapsible loess area pile foundation project as the research object,first carries on the non- uniform deformation of bearing experiment,this paper introduces the principle and model experiment device,and the experiment process is given. Based on the experimental results,the research of bridge pile foundation load- bearing characteristics,analyzes the bearing capacity of single pile,the single axial stress of pile,the pile side friction resistance,pile bearing capacity.Through single pile static load test of pile foundation,pile group study,it is concluded that in most of the single pile frictional resistance is the most in the pile body part,settlement of collapsible loess increased with the increase of pile number reduced. Hope it can provide theoretical help for bridge pile foundation load- bearing characteristics collapsible loess study in the future.