高速公路定测中特长隧道独立控制网的建立方法及应用

Establishment method and application of independent control network for extra-long tunnel in highway location survey

文章详细介绍了高速公路中特长隧道独立控制网的建立方法。该方法通过改变中央子午线或投影面的方式,减少了投影变形对控制点精度的影响;利用“一点一方向”平差方法,提高了控制网内部的精度。文章结合实际的工程项目,情况对所提方法的实用性和有效性进行了分析说明。

The establishment method of independent control network for extra-long tunnel in highway is introduced in this paper in detail.The impact of projection distortion on the accuracy of control point is reduced by changing the central meridian or projection plane.And the“one point,one direction”adjustment method is used to improve the accuracy within the control network.It is analyzed and explained for the practicality and efficiency of the proposed method in combination with the actual project situation.