中文摘要：

为了提高导线测量定位精度，在充分考虑传统导线计算特点的基础上，提出了用端点截取法来确定导线相对最弱边的方法，同时改进了复测支导线计算公式，用以确定该边的精度。实测数据验证表明，采用端点截取法确定的导线最弱边即为工程测量实际的最弱边。改进的计算方法简便有效，在缩短计算时间的同时确保了工程生产的精度要求，大大提高了特殊施工条件特别是井下导线测量的工作效率。

英文摘要：

In order to improve the positioning accuracy of trav- erse survey, based on full analyzing the characteristics of tradi- tional traverse calculation, this paper a new presents method that first find the relative weakest traverse side by intercepting the endpoint, then calculate the accuracy of the side by using im- proved calculation formula of repetitive open traverse. The actual measurement data demonstrates that the weakest traverse side determined by intercepting the endpoint is the actual one in engi- neering survey, the improved calculation formula is convenient and effective, can shorten the computing time greatly, mean- while, the accuracy of calculation is high enough for practical purposes, so can greatly improve the efficiency of traverse survey in underground survey or under some special construction conditions.