What are the causes of urban road surface collapse?
1 Answers
Road surface collapse causes include natural collapse and man-made collapse. Below are the specific reasons for road surface collapse: Natural collapse: Surface rocks and soil layers subside downward due to natural factors such as seismic vibrations, rainwater infiltration, gravitational pressure, and underground erosion-induced hollowing. Examples include loess collapse in the Loess Plateau region, lava collapse in volcanic lava distribution areas, and freeze-thaw collapse in permafrost zones. Man-made collapse: Ground subsidence caused by human activities, such as underground mining operations creating certain ranges of goaf areas, causing overlying rocks and soil layers to lose support and resulting in ground collapse; sudden water inflow during tunnel drainage or construction, excessive groundwater extraction, reservoir storage and water diversion, etc.