Development characteristics and influencing factors of sudden geological disasters in Pinggu District,Beijing
Pinggu district is one of the areas in Beijing with developed sudden geological disasters including collapse,landslide,debris flow,and ground collapse.The geological disasters and hidden dangers in Pinggu District are mainly distributed across the residential areas in middle mountainous areas and along mountainous roads of Zhenluoying,Xiongerzhai,Jinhaihu,and Huang-songyu in northeastern Pinggu.Disasters mainly occur in the main flood season of July and August.The terrain,lithology,and geo-logical structure are the internal geological factors that control disasters.Steep and undulating valleys,high and steep slopes,and dip slope are favorable terrains for geological disaster development.Soft and hard alternating clastic and carbonate rocks forma-tions are prone to collapses and debris flows.Quaternary loose soil and rock masses are prone to landslides and ground collapses.Disasters are more likely to occur near fault and fold zones.Human engineering activities such as slope cutting for house building and road construction,as well as heavy rainfall,are the main external influencing factors.
万方数据
维普
