全站仪Z坐标测量在大断面隧道拱顶下沉量测中的应用

摘要

介绍了全站仪Z坐标测量在大断面隧道拱顶下沉量测中应用的原理和方法，与传统的接触式量测相比，全站仪Z坐标测量具有任意点设站、仅整平不需对中、免量仪器高等优点，极大地提高了现场的工作效率，对类似工程具有参考意义。%〔Abstract〕 The principle and method of non-contact arch settlement measurement to large cross-section tunnel of z coordinate survey by total station are described in this article. Compared the traditional method, it has the advantages of free location, non-prism, not centering but circle settling screw, no height of the instrument and prism and so on. This method improves the efficiency greatly in tunnel arch settlement mea-surement survey, which has reference significance for similar engineering.