三角形量测法在隧道变形监测中的应用研究  

Application of diagonal measurement method in the displacement monitoring of tunnel

作　　者：曾鼎华[1] 张永兴[1] 阴可[1] 陈建功[1] 

机构地区：[1]重庆大学土木工程学院,重庆400045

出　　处：《水文地质工程地质》2005年第5期113-115,共3页Hydrogeology & Engineering Geology

基　　金：国家自然科学基金(50378096);教育部科学技术重点项目(03138)

摘　　要：通过对隧道变形监测中三角形量测法原理、计算公式的分析,认为公式中的三角形三边长度并不是收敛计的读数,两者相差一个收敛计本身的附加长度,这是使监测数据产生误差的原因之一。同时探讨了忽略收敛计附加长度引起的误差对监测结果的影响,并结合工程实例介绍了在实测过程中应注意的问题及误差原因。By analyzing the principle and formula for the displacement monitoring of tunnel, we found that the side-length of the triangle in the formula is not exactly equal to the convergence gauge＇s reading, which is longer for an additional length of the gauge itself. This is a reason for the error of monitoring result. Meantime, the affection caused by the ignorance of convergence gauge＇ s length was discussed in an actual case. Some critical issues and error-causes in practice were presented as well.

关 键 词：三角形量测法 隧道监测 拱顶下沉 误差分析 

分 类 号：P221.1[天文地球—大地测量学与测量工程] U452.11[天文地球—测绘科学与技术]