基于已有GNSS控制网的高精度隧道独立控制网建立方法

The establishment method of high precision tunnel independent control network based on the existing GNSS control network

施工单位在进行高速铁路长大隧道施工前,需要对设计院已建立的GNSS控制网进行复测、加密、建立隧道独立控制网用于指导隧道施工,常用的两种建立隧道独立控制网方法存在不同的缺陷,难以保证隧道实现高精度贯通。为此,本文提出了一种基于已有GNSS控制网的高精度隧道独立控制网建立方法,经多个特长隧道工程实际应用,保证了隧道实现高精度贯通所需精度,达到隧道衬砌无损施工而不侵限的目的。

Construction units before grew up in high speed railway tunnel construction,the need to design institute established GNSS control network for retest,encryption,to build tunnels used to guide the tunnel construction control network,the commonly used two methods of tunnel independent control net has different defects,it is difficult to guarantee the tunnel to realize high precision.Therefore,this paper puts forward a kind of tunnel based on GNSS existing control network with high accuracy,the methods to set up independent control net by multiple extra-long tunnel engineering practical application,to ensure the tunnel to realize high precision through the required accuracy,not abuse at the undamaged tunnel lining construction purpose.