Rock-socketed Pile With Bedrock Angle Changes On The Seismic Performance Of Composite Foundation Research

The economic expansion development of mountainous area and urban areaconstruction, a lot of bridge and buildings location have more restrictions, in thiscondition, the thickness of upper overburden rock are generally thin, need todesign for the rock socketed pile form, rock socketed pile to the small settlement,high bearing capacity, has been widely used in the practical engineering, theloading bearing mechanism and its transmission characteristics has beeninvestigated, the rock socketed pile and non-rock socketed pile form there arecertain differences, and both in the force transmission performance and load inthe process also differs from that of single pile bearing capacity of rock socketedpile in the properties of many, but the rock socketed pile group pile bearingperformance research less. And with the rock socketed pile embedded in rockinclined plane change, composite foundation and upper structure stressperformance is how to change, this research also relatively less.In recent years, frequent earthquakes, all kinds of buildings, bridges are inthe research gradually strengthened its seismic performance, seismic rockembedded pile should be given enough attention. During the earthquake, the pilefoundation is usually due to the resistance moment is insufficient and damage,even if does not have the phenomenon of rupture, the use of larger displacement will also affect the appearance of buildings, structures, but now pile foundationseismic design general according to experience to determine the seismicperformance evaluation standard, no mature theory, research on seismic aspectsof embedded rock pile more it is less and less.In this paper, using the finite element software ABAQUS to establishmodel, the rock socketed pile and non-rock socketed pile several circumstances,under the action of earthquake, the pile, raft and superstructure force simulation,research and analysis of the pile end of bedrock4meters, the pile end is locatedin the bedrock surface and the pile end is embedded into the inclined plane for0degrees,15degrees and30degrees of bedrock in applying these models, thecase of an earthquake, respectively, compared the bending moment of pile raft,horizontal displacement, stress and settlement and the horizontal displacementof the upper building, by contrast, study and explore the conditions change withthe influence rules of these properties which, through analyzing the wholedisplacement the situation of pile foundation-structure and superstructureacceleration time history curve, a preliminary discussion on the angle changes,the seismic performance of structure. Hope in the mountain building and bridgeconstruction, relates to the rock socketed pile project to play a certain referencerole.