关于围岩及边坡监测资料分析中一些问题的思考  

Observation Data Analysis of Wall Rock and Slope Monitoring

作　　者：王志远[1] 沈慧[1] 

机构地区：[1]国网电力科学研究院/南京南瑞集团公司,江苏省南京市210003

出　　处：《水电自动化与大坝监测》2011年第2期51-55,共5页HYDROPOWER AUTOMATION AND DAM MONITORING

摘　　要：通过对大量实测资料的统计与研究,讨论了影响多点位移计精度的可能因素,认为对于多点位移计观测成果的表述,一般用相对位移即可,只有当大于某值需进一步分析时才计算绝对位移。还从仪器原理角度分析了锚杆应力计高应力值混杂假象的原因,主要是由于仪器是按轴心受力构件设计,不适宜用于抗剪断的部位。呼吁有关单位认真研究判断已有资料真伪及其分析的方法。Several factors which influence the accuracy of multi-point extensometer from the statistical analysis of a large number of observation data are discussed.It is recommended that the relative displacement could be used for describing the measurement results in most occasions and the absolute displacement is calculated only when the relative displacement is greater than a certain value.The main reason for the false appearances in the data monitored is also explained by the anchor bar stress meters.Because the anchor bar stress meter can only take axially load,but not suitable for bending load.When it works under shear force,the stress value may become much greater than the actual value.The author suggests that this phenomenon should be paid enough attention to and the methods that how to distinguish the true from the false appearances should be discussed and studied by correlative researchers.

关 键 词：地下洞室 边坡变形 安全监测 多点位移计 锚杆应力计 

分 类 号：TV698.1[水利工程—水利水电工程]