陀螺定向在隧道贯通测量中的应用

陀螺定向在隧道贯穿测量中的应用陀螺定向在隧道贯穿测量中的应用 摘要：导线测量是隧道工程贯穿测量的保障，常规导线往往难以满足隧道工程贯穿测量的精度要求，为了提高隧道贯穿精度，需要在适当位置用陀螺全站仪加测隧道导线边，本文首先介绍了陀螺全站仪定向原理，结合中船重工AGT-5 型陀螺全站仪在郑万项目雷家坡隧道进行定向测量，将结果加入隧道内精密导线进行平差，结果加入陀螺定向测量方位角后，导线精度明显提高，确保隧道准确贯穿。 Abstract： Traverse survey is the guarantee of tunnel engineering penetration survey. Conventional conductors are often difficult to meet the accuracy requirements of tunnel engineering penetration survey. In order to improve tunnel penetration accuracy ， it is necessary to add a gyro total station to measure the tunnel conductor edge at an appropriate location. This paper first introduces the orientation principle of gyro total station. Combined with the AGT-5 gyro total station of CSMC， the orientation survey is carried out in the Leijiapo tunnel of Zhengwan project. The results are added to the precise traverse in the tunnel for adjustment. After the results are added to the azimuth angle of gyro orientation survey， the traverse precision is obviously improved to ensure the tunnel is connected accurately. 关键词：陀螺全站仪;子午收敛角;隧道贯穿测量;贯穿误差 Key words： gyro total station;meridian constringent angle;tunnel penetration measurement;penetration error 中 图 分 类 号 ： U452.1+7 文 献 标 识 码 ： A 文章編号：1006-4311（20XX）15-0192-03 0 引言 在铁路长大隧道控制测量中，一般采纳延伸导线方式进行隧道控制测量，随着隧道的掘进，缺少足够的检核条件，导致导线精度越来越低，贯穿误差随之增大。而采纳高精度陀螺全站仪可在隧道内进行陀螺定向测量，通过相关计算可得到隧道内任意导线边的方位角，用来对洞内导线进行检核与修正，以提高控制网的精度。当贯穿导线很长时，在合适的位置加测陀螺定向边用于导线平差，省去中间导线...