本文对高速铁路线路基础沉降及差异沉降的主要影响因素进行了分析,提出局部地下水开采是影响线路差异沉降的直接诱因。通过对不同差异沉降量下无砟轨道附加荷载及高速行车过程中车辆、轨道和桥梁动力响应的研究,初步提出了运营期线路基础差异沉降控制标准。 In this paper, the main factors affecting the settlement and differential settlement of high-speed railway line foundation are analyzed. It is suggested that the exploitation of local groundwater is the direct inducement of differential settlement. Based on the research on the dynamic response of vehicles, rails and bridges under different differential settlement and the dynamic response of ballastless track under high-speed driving, the preliminary control criteria of differential settlement of line foundation during operation period are proposed.