Research On Characteirstics And Formation Mechanism Of Sudden Geological Disasters In Tianjin Jixian Mountain Area

The objective conditions of occurrence of sudden geological disasters (landslides,landslides and mudslides) in the mountains of northern Tianjin presence in the heavyrain and sustained rainfall conditions, the history of the local geological disasterscaused some casualties and property losses. since the dawn of written records, suchdisasters resulting in a total of805local people were affected,45people were killedand16people injured;,890houses,100acres of farmland, more than100metersdrains, damaged more than600trees, the direct economic loss of nearly4,000million.In recent years, due to the new rural construction, it is important to build economic,cultural, commercial Ribbon mountains slope cutting and partially closed mines existin the mountain instability and other factors, geological hazard significantly increased.Effective prevention, mitigation, to reduce the losses caused by geological disasters toa minimum, you must first understand the developmental characteristics of geologicaldisasters, distribution, formation mechanism and stability of the situation.In this paper, the research Jixian mountainous area, geological disaster of175points based on finishing data analysis, the development features District suddengeological disasters, distribution were studied on a typical hazard mechanism wereanalyzed. Studies suggest that Jixian geological hazards in mountainous suddencollapse, landslide, debris flow based, including the development of106-pointcollapse hazard, accounting for60%of the total, the largest number of itsdevelopment, the most widely distributed type to dump the formula-based minicollapse; landslide Growth54, accounting for31%of the total, with small rockylandslide based; Debris Flow15, at least its development, and to a small valley debrisflow based.Typical collapse, the formation mechanism of landslides and mudslides that:main factors topography, lithology and geological structure of the formationmechanism of collapse, caused by human activity as the main factor, mining and roadslope cutting is most commonly caused by collapse of human activity. Topographyand lithology main factors for the development of landslides, heavy rainfall and toe excavation is the main factor triggering landslides. Topography is the master factormudslides formed, heavy rainfall or prolonged rainfall as the main trigger factor.