微型土压力盒的标定及修正  

Calibration and Correction of Miniature Earth Pressure Cell

作　　者：韦四江[1] 王大顺 郜进海[1] 苏承东[1] 

机构地区：[1]河南理工大学能源科学与工程学院,河南焦作454000 [2]煤炭工业郑州设计研究院有限公司,郑州450007

出　　处：《地下空间与工程学报》2009年第5期1003-1006,共4页Chinese Journal of Underground Space and Engineering

基　　金：国家自然科学基金项目(50874037);2007年度国家安全生产科技计划项目(07-148);河南理工大学博士论文创新基金项目

摘　　要：微型土压力盒的载荷系数K值与工作介质有很大关系,为研究其在不同介质中的工作特性,室内试验研究了散体材料、粉体材料和相似材料在砝码加载情况下的载荷系数。分析了厂家给定值和标定值的差异及产生原因,指出砂标K值偏差比厂家给定值小50%左右,试验时需要对给定值进行修正;粉体和相似材料的标定值与给定值相差不大,可以直接采用厂家所给数据。Operating characters in different materials of micro earth pressure cell（MEPC） were studied because of key relation between working medium and coefficient of load.Coefficient of load,K was studied in granular medium,powder medium and physical simulation loaded by weights in lab.Difference of K between experiment and given value and its reason were analyzed.The K in sand was lower than those determined from fluid calibrations by about 20 %.So the K in granular medium should be modified.The K in powder medium and physical simulation are approximately similar to the given value, so the K in these medium could be adopted.

关 键 词：微型土压力盒 标定 修正 

分 类 号：U455[建筑科学—桥梁与隧道工程]