论文部分内容阅读
高陡边坡桥墩同时承受上部结构传递的竖向荷载和桩周土体的侧向压力,墩柱受力性能复杂,易出现病害,影响桥梁安全。结合某高速公路桥墩倾斜的工程实例,对高陡边坡桥墩倾斜的机理进行分析,并对倾斜桥墩的安全性能进行评价。通过考虑边坡土体和桥墩的相互作用,采用数值方法对高陡边坡桥墩的受力特征进行研究,分析了墩柱倾斜和开裂的机理,并基于不同荷载下墩柱的内力组合,对墩柱的承载力进行评定。结果表明,边坡潜在滑移面受扰动后产生的坡体推力是引起墩柱倾斜的主要原因,坡体推力与车辆荷载及汽车制动力组合后,桥墩的承载力将不能满足设计要求。
The high-steep slope bridge piers simultaneously bear the vertical load transmitted by the superstructure and the lateral pressure of the soil around the pile. The pier columns have complex mechanical properties and are easily susceptible to disease and affect the safety of bridges. Combined with the engineering example of the slope of a highway bridge pier, the mechanism of slope inclination of high steep slope is analyzed, and the safety performance of inclined pier is evaluated. By considering the interaction between slope soil and bridge piers, the numerical method is used to study the stress characteristics of pier with high and steep slopes. The mechanism of pier inclination and cracking is analyzed. Based on the internal force combinations of pier columns under different loads, The bearing capacity of pier is assessed. The results show that the slope thrust generated after the potential slip surface is disturbed is the main reason causing the column to tilt. When the slope thrust is combined with the vehicle load and the vehicle braking force, the bearing capacity of the piers will not meet the design requirements.