超长铁路隧道洞内平面控制网横向贯通误差仿真计算分析与应用  

Simulation Analysis and Application of Lateral Breakthrough Error of Horizontal Control Network in Super Long Railway Tunnel

作　　者：谷思文 刘成龙 武瑞宏[3] 杨雪峰[1,2] 杨帆 GU Siwen;LIU Chenglong;WU Ruihong;YANG Xuefeng;YANG Fan(Faculty of Geosciences and Environmental Engineering,Southwest Jiaotong University,Chengdu 611756,China;State-Province Joint Engineering Laboratory in Spatial Information Technology for High-speed Railway Safety,Chengdu 611756,China;China Railway First Survey and Design Institute Group Co.,Ltd.,Xi'an 710043,China)

机构地区：[1]西南交通大学地球科学与环境工程学院,成都611756 [2]西南交通大学高速铁路运营安全空间信息技术国家地方联合工程实验室,成都611756 [3]中铁第一勘察设计院集团有限公司,西安710043

出　　处：《铁道标准设计》2023年第3期148-152,共5页Railway Standard Design

基　　金：中铁第一勘察设计院集团有限公司科研课题(院科(CZ)19-31)。

摘　　要：当前在建某高原铁路全线有17座20 km以上超长隧道,但我国尚未正式公布超长铁路隧道测量的相关规范要求,仅在某暂行规范中制定了20~25 km的超长隧道横向贯通误差的相关限差。为验证暂行规范中限差的合理性并对长度超过20 km的超长铁路隧道洞内横向贯通中误差的限差提出推荐值,设计进行仿真计算实验。模拟计算3种常用平面控制测量网下各20组20~44 km范围内7种长度的超长隧道在观测精度分别为隧道二等和平面二等精度时的洞内横向贯通中误差,得到以下成果:(1)给出两种不同观测精度下洞内横向贯通中误差的分布情况和限差推荐值;(2)观测精度为平面二等精度时,暂行规范中洞内横向贯通中误差的限差值偏大,且随着隧道长度增加,自由测站边角交会网精度最优;(3)观测精度为隧道二等精度时,暂行规范中隧道洞内横向贯通中误差的限差值偏小,且交叉导线网精度最优。At present,17 extra-long tunnels of more than 20 km each along the whole line of a plateau railway are under construction.However,China has not officially announced the relevant code for survey of extra-long tunnels,and only formulated the relevant tolerance of lateral breakthrough error for 20~25 km extra-long tunnels in Provisional Code.In order to verify the rationality of the tolerance in Provisional Code and put forward the recommended value of the tolerance of the lateral breakthrough mean square error for extra-long tunnels of more than 20 km,simulated calculation experiment is designed to calculate lateral breakthrough mean square errors of 20 groups of 20~44 km tunnels of 7 different lengths in three common plane control networks when the observation accuracy is second-order tunnel control network and second-order plane control network.The following results are obtained:(1)Distribution of mean square error and recommended value of the lateral breakthrough mean square error in tunnel under two different observation accuracy;(2)When the observation accuracy is second-order plane control network,the tolerance of the lateral breakthrough mean square error in tunnel in Provisional Code is too big;with the increase of tunnel length,the best network is free-station linear-angular intersection network;(3)When the observation accuracy is second-order tunnel control network,the tolerance of the lateral breakthrough mean square error in tunnel in Provisional Code is too small,and the best network is crossover traverse network.

关 键 词：铁路隧道 超长隧道 洞内横向贯通中误差 平面控制网 仿真计算 

分 类 号：U212.24[交通运输工程—道路与铁道工程] U459.1[建筑科学—桥梁与隧道工程]