向家坝下游高边坡蓄水前后外观变形空间聚集性态对比分析

发布时间：2018-06-02 05:53

本文选题：向家坝水库 + 水库蓄水　；参考：《长江科学院院报》2017年10期

【摘要】：水库蓄水会对周围工程与地质环境造成较大的影响,严重时甚至会引起岸体滑坡。基于空间计量学全局和局部空间自相关系数及其相关分析方法,以向家坝坝体下游坝后左岸人工高边坡为例,在传统研究只考虑二维坐标的情况下,进一步考虑不同测点的三维空间坐标,建立了考虑空间坐标的空间权重矩阵,计算了各个蓄水时段高边坡不同测点的外观变形数据的全局和局部空间自相关系数;对比了不同蓄水时段下游边坡外观变形的空间聚集性态,从而定位高边坡变形监测关键测点。研究结果表明:2种空间自相关系数可以有效探测变形数据的聚集程度,识别聚集区域;水库蓄水会在下游坡形成明显的空间聚集性变形,尤其是在蓄水初期变化最为剧烈,需要在该阶段加强观测。
[Abstract]:Reservoir water storage will have a great impact on the surrounding engineering and geological environment. Based on the global and local spatial autocorrelation coefficients of spatial metrology and their correlation analysis methods, taking the artificial high slope on the left bank of the downstream dam body of Xiangjiaba dam as an example, the traditional research only considers two-dimensional coordinates. Further, considering the three-dimensional coordinates of different measuring points, the spatial weight matrix considering the spatial coordinates is established, and the global and local spatial autocorrelation coefficients of the external deformation data of the high slope at different water storage periods are calculated. In order to locate the key points of deformation monitoring of high slope, the spatial aggregation behavior of slope appearance deformation in different storage periods is compared. The results show that the two spatial autocorrelation coefficients can effectively detect the aggregation degree of deformation data and identify the accumulation area, and the reservoir water storage will form obvious spatial aggregation deformation in the downstream slope, especially in the initial stage of storage. Observation needs to be strengthened at this stage.
【作者单位】：河海大学水文水资源与水利工程科学国家重点实验室;河海大学水资源高效利用与工程安全国家工程研究中心;上海市政工程设计研究总院水利水运设计研究院;
【基金】：国家自然科学基金重点项目(41323001,51139001) 高等学校博士学科点专项基金项目(20120094110005,20120094130003,20130094110010) 江苏省杰出青年基金项目(BK20140039) 水利部土石坝破坏机理与防控技术重点实验室基金项目(KY914002)
【分类号】：TV223

【相似文献】