我国煤炭产量高居世界首位，大量煤炭资源的开采，遗留了大面积的采空区场地。随着我国高速铁路的快速发展，一些关键线路难免会穿越采空区场地。采空区地基变形及高速列车密集动荷载下的活化变形对高速铁路安全运行存在着重大安全隐患。如何保障采空区场地高速铁路的安全运营是关键问题，其中采空区场地高速铁路路基变形控制研究是该类问题的核心内容。首先从理论研究、现场实测、模型试验和数值模拟4种研究手段分别总结了国内外高速铁路路基动力学和采空区地表变形的研究现状;接着重点从高速铁路列车动荷载分布及传递规律、高速铁路路基工后沉降相关要求、采空区地基与高速铁路路基相互作用机理、采空区场地高速铁路路基变形问题的可行性研究等4个方面介绍了采空区场地高速铁路路基变形问题的研究;最后简要总结了高速铁路采空区地基治理技术及采空区场地高速铁路路基抗变形措施等相关内容，并结合太原—焦作高铁和合肥—福州高铁线路穿越采空区场地而采取的实际治理方案及路基抗变形措施加以说明。在现有成果分析的基础上，探究了高速铁路动荷载最大扰动深度如何确定、高速铁路采空区地基本构模型如何选择、相似模型试验列车动荷载如何施加和高速铁路采空区地基治理体系如何完善等相关问题，并展望了该领域的发展方向。

China’s coal production ranks first in the world,and the extraction of large amounts of coal resources leaves a large area of goaf site.With the rapid development of high-speed railway in China,some key lines will inevitably pass through some goaf sites.The foundation deformation and the activation deformation under the dense dynamic load of high-speed train have great hidden danger to the safe operation of high-speed railway in goaf site.How to ensure the safe operation of high-speed railway in goaf site is a key problem,and the research on the deformation control of high-speed railway subgrade in goaf site is the core of this kind of problem.First,the research status of high-speed railway subgrade dynamics and ground deformation in mined-out areas are summarized from four research methods:theoretical research,field measurement,model test and numerical simulation.Then,the research on the deformation of high-speed railway subgrade in goaf site is introduced from the following four aspects:the distribution and transmission law of dynamic load of high-speed railway,the requirements of post construction settlement of high-speed railway subgrade,the interaction mechanism between goaf ground and high-speed railway subgrade,and the feasibility study on the deformation of high-speed railway sub-grade in goaf site.Finally,the goaf ground treatment technology and anti-deformation measures of high-speed railway subgrade are summarized,and the field improvement projects and the anti-deformation measures of sub-grade taken by Taiyuan to Jiaozuo and Hefei to Fuzhou high-speed railway line through the goaf site are explained.Based on the analysis of the existing research results,the paper explores how to determine the maximum disturbance depth of the dynamic load of the high-speed railway,how to select the constitutive model of the goaf ground under the action of high-speed railway,how to apply the dynamic load of the high-speed railway in the similar model test and how to improve the treatment system of the goaf ground,and looks forward to the development direction of this research field.

1 高速铁路路基动力学

   1.1 高速铁路路基动力学的理论模型

   1.2 高速铁路路基动力响应现场实测

   1.3 高速铁路路基动力模型试验

   1.4 高速铁路路基数值模拟

2 采空区地表变形的研究

   2.1 采场覆岩及地表移动变形理论

   2.2 采空区地表变形现场监测

   2.3 开采沉陷模型试验

   2.4 采场覆岩及地表移动变形的数值模拟

3 高速铁路采空区场地路基变形研究

   3.1 高速铁路列车动荷载传递及分布规律

   3.2 高速铁路路基工后沉降相关要求

   3.3 采空区地基与高速铁路路基相互作用机理浅析

   3.4 采空区场地高速铁路路基变形问题的可行性研究手段

4 高速铁路采空区地基治理技术

5 问题与展望

   5.1 存在问题

   5.2 展望