Research On Vertical Load-bearing Characteristics Of The Large-diameter Bridge Foundation

In mountain highway construction, to meet the alignment and protect the natural environment, often using the bridge structure to across slopes regions.How to ensure that the steep ramp area of the bridge foundation design's rationality and engineering's safety is worth to pay more attention,and in-depth understanding of load bearing mechanism and carrying capacity is the basic premise to solve the problem.Paper analyzes the main difference of force characteristics between slope and flat pile in the vertical load. Using finite element analysis software, carry out calculation on the slope pile foundation's bearing capacity with different slope, pile length, pile diameter, analysis the changes of slope pile carrying capacity and deformation law of pile lateral soil. Through comparison with the bearing capacity of flat pile foundation, obtain the changes of slope pile's effective pile length.To further study bridge foundation's load-bearing characteristics in the slope region. Paper also combine with the existing method calculating the bearing capacity of flat pile foundation and the specificity of slope areas bridge foundation, use regression analysis derived the empirical formula for the pile foundation effective pile length and bearing capacity in slope region, and verified its reliability.Thesis results provide a basis for the slope of the bridge foundation design and construction technology, the project has a certain practical value and theoretical significance.