CAJ | 학술논문

以豫西山区柳家凹黄土滑坡为研究对象,采用现场地质勘探和调绘的方法确定了滑坡的形态和性质;利用原位试验和室内试验确定了滑带土的强度衰减的影响因素和影响规律;采用现场监测等技术手段,确定了滑动深度.在此基础上,分析了柳家凹滑坡的活动历史、成因、范围和影响因素.调查和分析表明,柳家凹黄土滑坡的滑动机制可概括为古滑坡因路堑开挖和降雨而局部复活.古滑坡黄土体结构相对松散,抗剪强度较差.当古滑坡前缘土体被开挖后,古滑体失去前缘支挡,在自重应力和地下水共同作用下,古滑坡体前缘沿黄土层与砾石层交接面滑动带滑移破坏.根据古滑坡复活情况分析,柳家凹黄土滑坡为牵引式滑坡,当滑体前缘滑动后,后面的滑体陆续出现滑动,裂缝向纵深方向发展.
이예서산구류가요황토활파위연구대상,채용현장지질감탐화조회적방법학정료활파적형태화성질;이용원위시험화실내시험학정료활대토적강도쇠감적영향인소화영향규률;채용현장감측등기술수단,학정료활동심도.재차기출상,분석료류가요활파적활동역사、성인、범위화영향인소.조사화분석표명,류가요황토활파적활동궤제가개괄위고활파인로참개알화강우이국부복활.고활파황토체결구상대송산,항전강도교차.당고활파전연토체피개알후,고활체실거전연지당,재자중응력화지하수공동작용하,고활파체전연연황토층여력석층교접면활동대활이파배.근거고활파복활정황분석,류가요황토활파위견인식활파,당활체전연활동후,후면적활체륙속출현활동,렬봉향종심방향발전.
The field geological exploration and survey are used to determine the form and property of Liujiaao loess landslide; in the western mountainous area of Henan province in-situ test and laboratory test are used to determine the influence factors and weakening law of strength of sliding zone soil; field monitoring are used to determine sliding depth. The activity history, formation causes, range and influence factors of Liujiaao loess landslide are analysed based on investigation and tests. Survey and analysis results show that, the sliding mechanism of Liujiaao loess landslide can be summarized as local ancient landslide revives caused by excavation of cutting and rainfall. For ancient landslide, the loess mass structure is relatively loose and shear strength is poor. When the front soil of ancient landslide is cut, ancient landslide loses the front supporting and retaining, and then the front of ancient landslide slips and failures along the sliding zone of interface of loess layer and gravel layer under the interaction of gravity stress and groundwater. According to the analysis of ancient landslide revival, Liujiaao loess landslide is pull-type landslide. After the front of ancient landslide sliding, the latter can slide successively and the crack develops in depth.