近年来各级公路上都普遍存在屡禁不绝的超载、超限运输现象，使桥梁遭受严重破坏甚至坍塌。
In recent years, Overload is widespread despite repeated prohibitions in the highway at all levels, from which the bridge suffered serious damage or even collapse.
在矿山巷道掘进施工中，经常会遇到不良岩层，若处理不当，会导致巷道严重变形，甚至坍塌，使返修工作量增大。
Bad strata are often encountered in the process of drifting in mines, if improperly treated, they will lead to serious deformation of drift, even collapse, so as to increase the amount of repair work.
桥梁结构在使用过程中由于受到自然环境和人为因素的影响，逐渐发生老化、损伤甚至坍塌破坏，这些病害对桥梁结构的运营安全构成极大威胁。
Because of the natural environment and artificial factors, the bridge performance in service can gradually deteriorate, damage and collapse, which will greatly affect the safety of the structures.
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