【摘要】 发生于延安市甘泉县马岔沟的黄延高速公路14标段的滑坡灾害,滑坡体小但灾情严重,造成19人死亡、2人受伤。滑坡体滑向285°,滑动块体长约12 m,宽约10 m、厚约3 m,体积约360 m3,为一小型黄土滑坡。调查发现,滑坡体位于黄土沟壑区,属于地质灾害高易发区,后缘有一长大裂缝,为古滑坡体的一部分。形成原因主要是高陡边坡的存在,加之滑坡体上部储水设施引水管漏水,长期浸润,导致滑坡体含水量高达31%以上,最终形成一个规模小、滑距长、速度快的飞跃式滑坡,滑坡体直接砸在坡脚下的工棚上,致灾严重。提出了加强黄土沟壑区工棚、建筑工地选址论证和地质灾害监测的建议。更多还原

【Abstract】 At 21: 10 on October 10,2014,a landslide hazard occurred to the 14 th section of the Huangyan Express Way located at Machagou,Ganquan County,Yanan City. It caused 19 deaths and 2 injuries. The slip mass in 12 m long,10 m wide,3m thick with a volume about 360 m3 sliding 270°. It is a small landslide of loess.According to the investigation,the slip mass is located in the gully loess area which is an easy occurrence area of geological disaster. There is a large and long gap at the back edge which a part of the ancient slip mass. It is formed mainly for the existence of the high and steep slopes. Besides,the long term infiltration of pipe leakage of water storage facilities at the upper side of the slip mass causes the water content as high as over 31%,thus finally causes the formation of a leap type landslide of small scale,long distance and rapid speed. The slip mass directly hit on the word sheds at the foot of the slope and cause serious disasters. Arguments on strengthening work sheds and selection of constructions as well as suggestions on geological disaster monitoring are proposed.更多还原