Analysis of load transfer characteristics of digging well foundation in slope sections of difficult and dangerous mountain areas
In response to the current severe lag in research on the load-bearing characteristics of digging well foundation in slopes steep mountainous sections of difficult and dangerous mountain areas,this study is based on the actual engineering of the 10 # digging well foundation of the left side of the Leye to Wangmo Expressway Yunlai Super Bridge.By establishing a three-dimensional finite element model that considers the coupling effect of bridge piers,digging well foundations,and rock-soil,the research explores the load-displacement relationship,axial force transmission mechanism,sidewall friction,and base contact pressure variations of digging well foundation in slope sections of difficult and dangerous mountain areas under the combined action of horizontal and vertical loads.The results indicate that the application of horizontal loads leads to increased settlement of digging well foundation's top surface,but different types of horizontal loads have a relatively small impact on the settlement of the top surface.Foundation depth and sidewall friction significantly affect the axial force transmission of digging well foundation,with a sudden decrease in axial force occurring at the base end.Horizontal loads have a significant impact on sidewall friction within a depth range of 2/3L.Sidewall friction exhibits a bimodal distribution,with some stress uplift at the base end.There are two peak values of sidewall contact pressure,located at the foundation's top surface and at 0.93L.
digging well foundationload transfer characteristicssidewall frictioncontact pressure
万方数据
维普
