华北平原地面沉降对高速铁路的影响及其对策

研究目的：研究掌握中国华北平原区域地面沉降特征及其对高速铁路工程的影响，提出针对性的防治对策与工程措施，供高速铁路勘测、设计及施工参考。 研究方法：本文结合某高速铁路北京至济南段沿线地面沉降情况，采用统计分析方法对铁路沿线各段落的地面沉降的幅度、速率及线路坡度的改变进行了计算和预测，并参考有关规范标准计算分析了不均匀沉降对高速铁路桥梁、路基及轨道平顺性的影响。 研究结果：研究确定了华北平原地面沉降区内的地表变形特征及其对高速铁路的影响方式、影响程度，并提出了针对性的防治措施和对策。 研究结论：区域性地面沉降会改变线路坡度，同时对桥梁、路基及轨道平顺性会产生一定影响，而局部的不均匀沉降对高速铁路工程的影响相对较大，可通过控制地下水开采、合理选线、采取合理的线路坡度及适宜的工程结构措施加以防治。

The Influence of Surface Subsidence on Construction of High-speed Railway in North China Plain and Its Countermeasures

Research purposes: Through making clear of the characteristics of surface subsidence and its influence on construction of high-speed railway in North China plain,the countermeasures and construction measures for prevention of subsidence are put forward for the purpose of providing reference to survey,design and construction of high-speed railway.Research methods:Combining with the circumstance of surface subsidence along the line between Beijing and Jinan of one high-speed railway,the calculation and prediction are made for the amplitude and velocity of surface subsidence and the slope change along the railway with traditional methods,and also the calculations are made for the influences of uneven surface subsidence on the regularities of the bridge,subgrade and track of high-peed railway according to the relative standards.Research results:Through doing research,the characteristics of surface deformation in subsidence area and its influence manner and degree on high-speed railway are made clear,and the countermeasures and construction measures are put forward for prevention of subsidencer.Research conclusions:The regional surface subsidence can change track slope and produce the certain influence on the regularities of the bridge,subgrade and track of high-speed railway.However the local uneven surface subsidence can produce much influence on construction of high-speed railway,but it can be prevented by controlling groundwater and adopting rational alignment,track gradient and engineering structure.