摘要
对影响长大隧道洞横向贯通误差的精度进行了分析,着重从平差方法方面进行了论述,提出了Helmert定权方法,利用Helmert定权方法对五条长大隧道洞内控制网平差处理,分析洞内控制网的点位精度、验后单位权方差和横向贯通误差,达到了提高长大隧道横向贯通精度的效果,解决了长大隧道平面控制网平差精度问题。
The accuracy of the lateral penetration error affecting the long tunnel is analyzed,and the method of adjustment is emphatically discussed. The Helmert method is put forward,and the adjustment of control network adjustment in the five long tunnel tunnels is treated by Helmert fixed weight method,and the point position precision of the control network in the tunnel,the post inspection unit weight variance and the lateral penetration error are analyzed. It has achieved the effect of improving the lateral penetration accuracy of long tunnels,and solved the problem of adjustment accuracy of long tunnel horizontal control network.
作者
宋继化
Song Jihua(China Railway First Survey and Design Institute Group Co. , Ltd, Xi＇an 710043 , China)
出处
《山西建筑》
2018年第12期200-202,共3页
Shanxi Architecture
