Research On Effect Of Slide Subjected To Surcharge Loads On The Mechanical Characteristics Of Pier And Pile Foundation

In recent years,along with the advancement of western development,ensuring the safety of construction of highway Bridges by the western region is a problem to be solved right now.In this paper,we mainly study the engineering problems of the piers which aimed at A to B highway Some one bridge.The effects of the stack and heap load sliding around piers of the bridge pile foundation on the mechanical behavior of the piers are studied,providing the theoretical guidance and basis for the bridge structure construction and safety protection.Firstly,the lateral displacement and internal force(bending moment,shear force and axial force)distribution of the piers of the piles are calculated by the displacement method for the deviation of the piers of the highway bridge in the steep slope area.The results show that the load sliding is the main factor influencing the safety of bridges according to the results,significantly displacement and internal force of piers increased after sliding;The lateral displacement and internal force increased nonlinearly with increasing loading when the magnitude of stack influencing deviation and internal force distribution of pile body;Department of pile foundation near the beam where the bending moment and shear force are larger saltation appears adverse stress area.Consequently,it's necessary to avoid the large stack of bridge pile foundation to reduce bridge damages.The theoretical results are close to the measured values of the field,indicating that the analytical method used is effective and feasible.The results of the study provide the basis for the analysis of the deformation and internal force of the piles in the actual engineering,and have reference value for the design and construction of similar projects.Secondly,the three-dimensional numerical simulation model of the 67 #,68 # and 69 # piers of the bridge was established by ANSYS finite element software.The vertical and horizontal about the stress and displacement simulation models of the piers before and after load sliding were obtained.The numerical simulation value,the measured deviation value and the theoretical calculation value of the bending moment are compared to do further study of the impact of the pile on the bridge pile foundation.The results show that the heap size of a certain extent before the loading and unloading slip has little effect on the stress and strain of the piles and the surrounding soil.After the loading and sliding,the size of the pile has a great influence on the stress and strain of the piles and the surrounding soil,The vertical displacement of the pile foundation is not changed greatly,and the others are greatly increased.The maximum value and the offset value of the numerical simulation results are much smaller than the theoretical calculation values.The maximum value of bending moment in the simulation results is slightly smaller than the theoretical calculation value.The difference between the lateral deviation and the theoretical calculation is not more than 18.4%,which is less than 8.4%,which proves the correctness of the numerical simulation results and rationality.Finally,according to the actual engineering disease of a bridge,reasonable prevention and control measures are put forward to rectify the bridge piles of the disease,and to reinforce the damaged beam.After that,it should be safe to protect the bridge and pier foundation,To ensure the safe operation of highway bridges.In this paper,the proposed disease prevention and control measures for the treatment of diseases of a special bridge piers provide a reference for the prevention and treatment of such diseases.