反演分析中量测误差的传递与仪表选择的研究  

A STUDY ON TRANSMISSION OF READING ERRORS IN BACK ANALYSIS AND SELECTION OF MEASURING INSTRUMENTS

作　　者：杨林德[1] 吴蔺[1] 周汉杰[1] 

机构地区：[1]同济大学,上海四平路200092

出　　处：《土木工程学报》2000年第1期77-82,共6页China Civil Engineering Journal

摘　　要：本文通过研究仪表读数误差对位移反分析计算结果精度的影响，建立可用于在工程实践中指导量测仪表选择的准则和方法。文中除结合弹性平面应变问题的位移反分析方法给出理论证明外，对以往工程实践中量测仪表和参与反演计算的量测数据选择的合适性也作出了判断。研究结果可为信息化施工的现场监测提供指导，并有较大的意义。Based on the principle of back analysis for 2D plane strain problems to determine initial rock stresses and material behavior parameters of a rock mass, this paper focuses on evaluating the effect of reading errors, which happened duing measuring at a construction site and were related to the accuracy of meter reading, measurement techniques and calculation in back analysis. The formulas to show the influence level of reading erorrs to the results of back analysis are derived at first, then a criterion is established to choose the proper instruments in practical engineering to measrue the displacement induced by excavating with the view of back analysis. An examle is given at the end of the paper to describe the displacement distribution around an opening, evaluate the influence level of reading errors to the results of back analysis, and conclude what kind of instruments can be used to measure the displacements for the purpose of back analysis.

关 键 词：地下工程 位移量测 反分析方法 仪表选择 

分 类 号：TU91[建筑科学—建筑理论]