王治华, 贾伟洁. 2017: 基于数字滑坡技术的三峡新滩滑坡研究. 工程地质学报, 25(3): 762-771. DOI: 10.13544/j.cnki.jeg.2017.03.024
    引用本文: 王治华, 贾伟洁. 2017: 基于数字滑坡技术的三峡新滩滑坡研究. 工程地质学报, 25(3): 762-771. DOI: 10.13544/j.cnki.jeg.2017.03.024
    WANG Zhihua, JIA Weijie. 2017: STUDY ON XINTAN LANDSLIDE IN THREE GORGE BASED ON DIGITAL LANDSLIDE TECHNIQUE. JOURNAL OF ENGINEERING GEOLOGY, 25(3): 762-771. DOI: 10.13544/j.cnki.jeg.2017.03.024
    Citation: WANG Zhihua, JIA Weijie. 2017: STUDY ON XINTAN LANDSLIDE IN THREE GORGE BASED ON DIGITAL LANDSLIDE TECHNIQUE. JOURNAL OF ENGINEERING GEOLOGY, 25(3): 762-771. DOI: 10.13544/j.cnki.jeg.2017.03.024

    基于数字滑坡技术的三峡新滩滑坡研究

    STUDY ON XINTAN LANDSLIDE IN THREE GORGE BASED ON DIGITAL LANDSLIDE TECHNIQUE

    • 摘要: 以6.12新滩滑坡前后的航摄图像及数字地形为信息源,采用数字滑坡技术,以更广阔的时空视野,更准确的地理配准及更直观清晰的表达方式,从切层滑坡类型之一的角度,再次宏观分析6.12新滩滑坡活动特征,指出该滑坡是分段分区活动的,各区段的规模、活动方式、方向各不相同,且分区段多级驱动;基岩裂隙对滑坡有一定的控制作用,姜家坡—新滩斜坡滑坡活动将持续间断地发生,难以完全停止。基于数字滑坡技术早期识别该类滑坡的关键工作方法除了详细调查滑坡所处地质环境外,主要是监测斜坡活动,主要监测内容有:① 主要滑坡物质来源的崩塌活动及其下堆积的变化,确定滑前崩塌堆积的预警(最大)面积;② 监测各段各区块活动,特别是驱动区块的活动;③ 监测堆积坡上显示的基岩裂隙变化。由于斜坡的地质与地形条件,建议进行长期连续性的监测。

       

      Abstract: This paper uses the aerial images before and after the 6.12 Xintan Landslide and digital terrain as the information source. It adopts digital landslide technique, and takes a broader view of space-time. It aims to have more accurate geographical registration and more intuitive and clear expression. From the angle of one of the typical layer landslide types, it analyzes the characteristics of the 6.12 Xintan Landslide activities again in macro view. It suggests that the landslide is a piecewise partition activity. In the meantime, the size of each section, the activity way and the direction of each part are different. The landslide is driven by partition period of multistage movement. It is found that bedrock fissure control the landslide activities to a certain extent. Landslide activity of Jiangjiapo-Xintan slope can happen continuously and is difficult to stop completely. In addition to detailed investigation of geological environment of Xintan Landslide, the key method of digital landslide technique for identify initial failure of this type of layer landslide is to monitor the Jiangjiapo-Xintan slope. The main monitoring contents should include the follow three work. (1) The collapse activities of the main landslide material source areas, the change of the collapse debris accumulation below, and acquiring the warning(maximum) area size of the accumulate debris before slip. (2) The activities of each section on each stage, especially the activities of driving section. (3) The change of bedrock fissure shown on the debris accumulation slope. Because the geological and topography environment of Jiangjiapo-Xintan slope, long-term and successive monitoring is strongly recommended.

       

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