用全站仪进行隧道拱顶及地表沉降观测初探

在测量麻竹高速公路宜保康隧道的拱顶以及地表沉降时,本工程采用了全站仪三角高程法,实践证明,该方法不仅具有快速、高效以及可靠等优点,其精度也能充分满足施工检测的要求。采用全站仪三角高程测量隧道内拱顶和地表沉降时,测量结果不仅能够很好的反映施工过程中围岩和土体的基本变化趋势,还能反映结果受到施工影响产生的异常变化,这些都是现场安排施工和评价支护稳定性的可靠依据。

Using Total Station to Observe Tunnel Vault and Surface Subsidence

In measuring Mazhu expressway Yibaokang tunnel vault and the surface subsidence, the project adopts total station triangle elevation method, the practice has proved that this method is not only rapid, efficient and reliable, its precision can fully meet the requirements of the construction. Using total station trigonometric apparatus to measure tunnel vault and the surface subsidence, the measured results can not only well reflect the basic trend of surrounding rock and soil mass in construction process, can also reflect the changes of the result affected by construction, these are all reliable basis of on-site construction and the evaluation of supporting stability.