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北京是地质灾害多发城市,通过对门头沟清水镇某建设用地进行调查,确定了评估区内主要地灾类型为泥石流、崩塌、滑坡及断裂。在此基础上,运用量化评分、赤平投影等方法,对上述地灾类型进行了评估。认为区内石流沟属轻度易发,危害性小;崩塌规模小,危害程度不大;虽然有产生滑坡的条件,但因年降水量小,故滑坡致灾性小;区内亦未发现因断裂造成的破坏现象,故断裂对场地稳定性影响不大。这为下步工程建设和地灾防治提供了依据。
Beijing is a city with multiple geological disasters. Through a survey of a construction site in Qingshui Town, Mentougou, Beijing, the main types of earthquakes in the assessment area are debris flows, landslides and landslides. On this basis, we use the methods of quantitative evaluation and stereographic projection to evaluate the above types of disaster. It is considered that the stone flow ditch in the area is mildly prone and has little danger. The scale of the collapse is small and the degree of hazard is not so great. Although the condition of landslide is generated, the landslide is less disastrous because of the small amount of annual precipitation. Found that the damage caused by the fracture, so the fracture has little effect on the stability of the site. This provides the basis for the construction of next step and disaster prevention.