浅层地下水对高标准铁路工程的影响研究

Study on the Influence of Shallow Groundwater on High Standard Railway Engineering

高标准铁路一般采用无砟轨道，对变形限制十分严格。铁路设计中虽考虑了多种荷载的作用，但一般对抽水引起的地面沉降却重视不够。文中根据浅层地下水的性质，阐述了抽水引起的地面沉降机理和影响因素，并结合典型实例，计算分析了抽取浅层地下水引起的小范围地面沉降对路基工程、桥梁单桩承载力以及连续梁应力增量的影响。

Ballastless track is commonly adopted in high standard railway, which has strict deformation limit. Although various loads have been taken into account during railway design, surface settlement caused by dewatering has not been attached enough importance. Based on the property of shallow groundwater, this paper describes the mechanism and influence factors of surface settlement by dewatering. Combined with typical example, it calculates the influence of small-scale surface settlement caused by withdrawing shallow groundwater on subgrade engineering, bridge single pile bearing capacity and continuous beam stress increase.