| 某山区机场高填方滑坡变形特征分析 |
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| 引用本文： | 马翔,赖国泉.某山区机场高填方滑坡变形特征分析[J].中国地质灾害与防治学报,2019,30(4):16-23. |
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| 作者姓名： | 马翔 赖国泉 |
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| 作者单位： | 四川省机场集团有限公司;中铁西北科学研究院有限公司 |
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| 摘 要： | 西南山区某机场高填方边坡在雨季结束后不久产生了变形。通过现场调查,坡体后部土面区出现了三条拉张裂缝,左右侧界也有明显变形迹象,坡脚五级马道水沟挤压变形严重,坡脚挡墙产生一小段垮塌变形。通过地表宏观变形判断坡体处于挤压变形阶段。对此段填方体滑坡及时实施了应急变形监测与工程地质勘察。通过地表变形监测曲线分析,由于错过了初始变形阶段的监测,该滑坡变形一开始就处于等速变形阶段。该滑坡在抗滑桩开挖过程中,变形明显加剧。坡体变形进入加速阶段后,变形速率及变形加速度较等速变形阶段成倍增加。在变形进入临界状态前,及时实施了坡体后部刷方减载,坡脚堆载反压的应急治理措施。应急治理措施实施后,坡体变形速率迅速减小,为永久治理工程的实施争取了时间。
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| 关 键 词： | 高填方滑坡 应急变形监测 应急治理 刷方减载 坡脚堆载反压 |
Analysis on deformation monitoring of a high fill landslide in a mountain airport |
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| MA Xiang,LAI Guoquan.Analysis on deformation monitoring of a high fill landslide in a mountain airport[J].The Chinese Journal of Geological Hazard and Control,2019,30(4):16-23. |
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| Authors: | MA Xiang LAI Guoquan |
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| Affiliation: | (Sichuan Airport Group Co.LTD,Chengdu,Sichuan 610000,China;Northwest Research Institute Co.,Ltd.of C.R.E.C.,Lanzhou,Gansu 730000,China) |
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| Abstract: | The high fill slope of an airport in a mountainous area of southwest China deformed shortly after the end of the rainy season.Through the field investigation,three tensile cracks was observed in the soil surface area at the back of the slope.The left and right boundaries also showed obvious deformation,and the grade 5 raceway at the foot of the slope is seriously extruded.The creep deformation stage of slope is judged by the surface macroscopic deformation.The emergency deformation monitoring and engineering geological survey were carried out in time.Through the analysis on surface deformation monitoring curve,it was found that the deformation of landslide was at the stage of constant velocity at the very beginning,since the stage of initial deformation was missed.The deformation of the landslide was obviously intensified in the process of anti-slide pile excavation,after entering the acceleration stage,the deformation rate and acceleration increased exponentially compared with that of the constant deformation stage.Before the deformation entered the critical state,the emergency measures of load reduction by brush side at the back of slope body and backpressure by heap load at slope foot were implemented in time.Thus,the rate of slope deformation decreased rapidly,which bought time for the implementation of permanent treatment project. |
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| Keywords: | high fill landslide emergency deformation monitoring urgent treatment brushthe lightening backpressure at toe of slope |
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