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截止2011年底,我国高速公路通车里程已达85000km。随着高速公路里程的不断攀升,高速公路建设难度也在不断增大。本案例高速公路与500kV高压线路共用17km走廊带,所以高压铁塔基础稳定性受高速公路桥梁桩基与高压铁塔距离影响。通过使用Midas/GTS对高速公路桥梁桩基与铁塔距离在5.5m,7.5m,10m和15m的情况进行模拟,同时考虑土体变形、水的渗流和长期沉降等因素,分析模拟结果,提出桥梁桩基与铁塔基础净距评判表,为类似公路工程提供借鉴。
As of the end of 2011, the mileage of our country’s expressways reached 85,000km. As highway mileage continues to rise, the difficulty of highway construction is also growing. In this case, the highway and the 500kV high voltage line share a 17km corridor zone, so the stability of the foundation of the high-voltage tower is affected by the distance between the pile foundation of the expressway bridge and the high-voltage tower. By using Midas / GTS to simulate the distance between the pile foundation and the tower of expressway bridge at 5.5m, 7.5m, 10m and 15m, taking into account factors such as soil deformation, seepage of water and long-term settlement, the simulation results are analyzed and the bridge Pile foundation and tower base clearance evaluation table for similar road projects to provide reference.