地铁工程穿越岩溶地区处理技术研究

Study of engineering treatment technologies for subway engineering crossing karst area

以在建的武汉地铁2号线广埠屯-光谷广场为工程背景,阐述了岩溶处理的原则,较详细地介绍了地铁区间隧道、车站穿越岩溶不良地质条件下的工程处理措施与方法:溶洞探测、风险区划分、岩溶注浆设计与施工方法以及施工控制要求等,其中重点讨论了岩溶处理方法和灌浆技术指标的控制。目前,该地铁区间段已基本建成,未出现意外地质风险,其有关技术处理方法与措施可为类似地铁工程的设计和施工提供借鉴。

Taking the interval of Guangbutun——Guanggu Square on NO.2 subway line in Wuhan City as an example,we firstly introduce the treatment principles and methods of karst area,then demonstrate the engineering treatments in the condition that tunnels and stations of subway cross karst area,including karst cave detecting,risk area zoning,grouting design,construction methods and principles,etc.Especially,we highlight the treatment method for karst caves and the control indexes of grouting.It can provide valuable informations for design and construction of subway projects crossing karst area.