京津冀地面沉降地区轨道交通工程地质选线

Geological Route Selection of the Rail Transit Engineering in Ground Subsidence Area of Beijing-Tianjin-Hebei

地面沉降是一种具有隐蔽性、累进性等特点的地质灾害,由于高标准轨道交通工程一般采用无砟轨道,对变形的要求很高,虽然在设计过程中考虑了多种工况的影响,但是对地面沉降的危害往往不够重视。本文主要说明了京津冀地区地面沉降状况和原因,分析了开采地下水引起的地面沉降对高标准轨道工程的影响,提出了地面沉降地区高标准轨道交通工程地质选线原则和综合防护措施。

Land subsidence is a kind of geological disaster with the concealment and progressive characteristics. Because of the high standard on the deformation,ballastless track is commonly used in high standard rail transit engineering. Although it has been considered the variety influence of conditions in the design process,the harm of ground subsidence is often not got enough attention. In the paper,situation and reason for the ground subsidence of Beijing-Tianjin-Hebei was explained,the influence of land subsidence caused by exploitation of groundwater to high standard railway engineering was analyzed,and the principle of geological route selection and comprehensive protection measures for ground subsidence area were put forward at last.