摘要
根据地铁盾构施工实践经验,从传统隧道贯通控制导线形式———支导线出发,提出了3种不同的改进测量方案,即:菱形布网、环形布网、矩形布网,并利用数学扭曲法模拟数据用计算机编程计算出4种方案的端点精度进行对比分析,得出如下结论:(1)导线横向误差随导线延伸成递增趋势,导线越长增加速度越快;(2)当采用改进方案时,横向精度明显提高;(3)工作量,菱形法比支导线增加约136.6%,四边形法比支导线增加约100%,环形导线法比支导线法增加约118.3%;(4)环形导线比支导线精度提高约35%,四边形导线精度提高约53.4%,菱形导线法精度提高约44.2%。总之,四边形法是最优方案,建议在实践中推广使用。
According to the practice of the shield subway construction, on the basis of open traverse used in traditional tunnel surveying, the paper puts forward three kinds of improvements namely, main-secondary station diamond traverse,main-secondary station quadrilateral traverse,and annular traverse, and analyzes the end pointerror by mathematic distortion method to simulate corresponding data. The results showed that the lateral error of the traverse increases with the traverse extending, the error increasing rate rises with the traverse extending; when using the improvments accuracies of these procedures errors become smaller obviously, the survey quantity for diamond traverse increases about 136.6% with open traverse, for quadrilateral traverse increases about 100%, for annular traverse increases about 118.3% ; the accuracy of annular traverse increases about 35% , that of quadrilateral traverse increases about 53.4%, that of diamond traverse increases about 44.2%. In short, the quadrilateral traverse is the optimal scheme, and may be suggested to use in the practise.
出处
《南京工业大学学报（自然科学版）》
CAS
2006年第2期56-58,共3页
Journal of Nanjing Tech University(Natural Science Edition)
关键词
地下导线
点位误差
主辅点法
the underground traverse
horizontal error of traverse
main-secondary station
