卸荷引起堆积体边坡变形的空间变异性分析  

Spatial variability analysis of talus slope deformation caused by unloading

作　　者：阮永芬[1] 刘克文[2] 高丙勋 黄兴周[4] 

机构地区：[1]昆明理工大学建筑工程学院,云南昆明650500 [2]十四冶建设云南勘察设计有限公司,云南昆明650031 [3]西南有色昆明勘察设计院股份有限公司,云南昆明650051 [4]保山学院物理系,云南保山675800

出　　处：《排灌机械工程学报》2016年第2期138-144,共7页Journal of Drainage and Irrigation Machinery Engineering

基　　金：昆明理工大学人才培养基金资助项目(639420040011);高等学校博士学科点专项科研基金资助项目(KKQS201306007);横向课题(kkk0201506021)

摘　　要：利用地质统计学原理和遗传算法,确定出卸荷条件下堆积体边坡变形的变异函数,对堆积体边坡进行卸荷条件下变形的时间变异性分析.采用角度误差限和距离误差限,对并不完全呈网格状的实际观测点布置进行网格化处理,求出各方向的变异函数,进行卸荷条件堆积体边坡变形的空间变异性分析,同时构造出方向综合变异指标,分析堆积体边坡卸荷条件下哪个方向的变异性最大,从而关注此方向的变形发展.利用熵权理论对普通克立格方程组的负权值进行修正,用修正后的权值对卸荷条件下堆积体边坡待估点的变形进行普通克立格估值.用所提理论对堆积体边坡卸荷时实际监测到的变形资料进行空间变异性分析,分析结果和实际监测情况较吻合,证明了分析理论的正确性和可行性,也为变形分析提供了一种新的分析方法和思路.The analysis of time variability of talus slope under its unloading process is conducted by the geostatistics theory and genetic algorithm to fit the spatial variation function. The grid processing for the actual observation point layout is carried out by using angle error limit and range error limit,then the variation function of each direction is calculated,furthermore the variability analysis for talus slope under the unloading condition is carried out; meanwhile,the directional synthetic variance index is constructed. By the analysis of the maximum variability in the direction,its displacement change should be detected carefully. The negative weight of ordinary Kriging equations is modified by the entropy theo-ry,and then the ordinary Kriging estimation of estimated point displacement of accumulation body slope under the unloading process is carried out. The theory of the proposed deformation of slope unloading to the actual monitoring data analysis of spatial variability,and the theoretical results fit well with the actual monitoring results. This model is proved to be correct and feasible of the theory,also it provides a new idea and train of thought for the deformation analysis.

关 键 词：卸荷变形 方向变异性 克立格估值 负权值 球状模型 

分 类 号：S284[农业科学—农业水土工程]