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在某高速公路隧道在由西向东掘进过程中,遇到断裂带,发生了大规模塌方。随后采取了各种支护措施,共耗资数百万元,运出塌落岩土近14000m~3,经过数月工作,该隧道不仅没有延伸,反而倒退了4m,并最终在地表形成一直径30m、深20m的陷坑,施工开挖工作被迫中断。该隧道掘进工作的顺利实施与否关系到高速公路能否按期通车,出现如此大规模的塌方并且多种支护方案均告失
In a highway tunnel running from west to east in the process of encountering the fault zone, a large-scale collapse occurred. Subsequent support measures took a total cost of millions of dollars, shipped out of collapsed rock and soil nearly 14000m ~ 3, after months of work, the tunnel not only did not extend, but back down 4m, and eventually form a diameter on the surface 30m, 20m deep pit, construction excavation was forced to interrupt. Whether the tunneling work is carried out smoothly or not depends on whether the expressway can be opened to traffic on schedule and such large-scale landslides occur