摘要
研究区裂缝增多且坡体大范围下挫,最大裂缝宽度达1 m,造成下部路床隆起,随时可能发生大规模滑坡,直接威胁高速公路工程和施工人员的安全,估算滑坡体方量约25万m^(3),具有较大潜在危害。根据已滑动岩土体规模及滑坡平面形状、滑动面埋深,滑坡变形规律及力学性质特征,判断得出,该滑坡属于中型牵引滑坡;采用现场勘查结合软件试算,对其稳定性进行了评价。正常工况下,滑坡稳定性系数为0.872~0.990,处于不稳定状态,该滑坡治理任务非常迫切,提出了防治技术,结合滑坡类型、变形特征、危害对象及稳定性分析,确定采用抗滑桩支护+削方减载+坡脚反压+裂缝回填+截排水沟+路基换填相结合的综合防治工程措施。研究为滑坡防治工程的设计提供了地质依据。
In view of the increase of cracks and the large scale decline of the slope,the maximum crack width is up to 1 m,causing the uplift of the lower roadbed,which may lead to large scale landslide at any time,directly threatening the safety of the expressway project and construction personnel,the estimated landslide volume in the study area is about 250000 m^(3),which has great potential hazards.According to the scale of the sliding rock and soil mass,the plane shape of the landslide,the buried depth of the sliding surface,the deformation law of the landslide and the mechanical property characteristics,this paper judges that the landslide is a medium-sized traction landslide.The stability of the landslide was evaluated by field investigation combined with software trial calculation.Under normal working conditions,the landslide stability coefficient is 0.872~0.990,which is unstable state.The landslide treatment task is very urgent.The prevention and control technology was proposed.Based on the analysis of landslide types,deformation characteristics,hazard objects and stability,a comprehensive prevention and control engineering measure combining anti-slide pile supporting,cutting and load reduction,back pressure of slope foot,crack backfilling,intercepting and drainage ditches,and roadbed replacement is determined to be adopted.The study provides geological basis for the design of landslide prevention and control engineering.
作者
吴祖成
田飞
乔少南
侯利阳
朱亚林
姚宗贵
Wu Zucheng;Tian Fei;Qiao Shaonan;Hou Liyang;Zhu Yalin;Yao Zonggui(The Fifth Geological Exploration Institute,Henan Provincial Bureau of Geology and Mineral Exploration and Development,Zhengzhou 450001,China)
出处
《能源与环保》
2023年第8期16-23,共8页
CHINA ENERGY AND ENVIRONMENTAL PROTECTION
基金
河南省地质灾害风险调查基金项目(豫财地灾合字〔2021〕第26号、豫财地灾合字〔2021〕第50号)。
关键词
滑坡稳定性
中型牵引滑坡
不稳定状态
抗滑桩
坡脚反压
landslide stability
medium-sized traction landslide
unstable state
anti-slide pile
back pressure of slope foot
