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我国隐伏岩溶分布的地区十分广泛,但产生塌陷的地区却多在南方,如湖南、广东、广西、贵州和福建等省。塌陷严重者,会使整个矿区报废,毁坏建筑物和大片农田,中断铁路和公路交通等,给国家的生产建设造成巨大损失,并严重地威胁着人民的生命安全。但是,必须指出并非所有的塌陷地区都是那么严重。关键是采用哪种行之有效的勘察手段,通过勘察对这类地区地基的稳定性作出正确的评价。本文通过几个工程实例的分析,对这一课题进行了初步探讨。
Hidden karst areas are widely distributed in our country, but the subsidence areas are mostly in the south, such as Hunan, Guangdong, Guangxi, Guizhou and Fujian provinces. In serious cases, the entire mining area will be scrapped, the buildings and large areas of farmland will be destroyed, the railway and highway traffic will be interrupted, causing huge losses to the country’s production and construction and seriously threatening people’s lives and safety. However, it must be pointed out that not all subsidence areas are so serious. The key is to adopt what kind of effective survey means to investigate the stability of the foundation in such areas to make a correct assessment. This article has carried on the preliminary discussion to this subject through the analysis of several engineering examples.