摘要
自地铁建设以来,地铁施工测量要求越来越高,源于高铁建设的CPⅢ测量系统在施工与铺轨方面对于提高精度和测量速度都有非常好的效果。然而,由于地铁施工环境复杂,隧道横向空间小,纵向曲线半径小,给CPⅢ三角高程测量带来了很多问题。本文基于实际工程,对CPⅢ网在地铁中的三角高程数据处理进行探讨,对三角高程中间法平差网型进行改进,探讨用三角高程进行地铁高程控制测量的可行性。结果表明,采用改进的中间法网型进行三角高程测量,能够有效消除大气折光误差的影响,能够满足地铁施工精度要求。
Since the construction of subway,measurement accuracy requirements are increasingly high.To improve the accuracy and measuring speed,CPⅢ surveying system has very good effects in laying and construction. However,due to the complex environment of the subway construction,CPⅢ trigonometric leveling brings a lot of problems. Based on the actual project,this paper discusses the trigonometric leveling data processing of CP Ⅲ net in the subway,and discusses the improvement of the trigonometric leveling net type, and discusses the feasibility of using the trigonometric leveling to control the measurement of the height. It is concluded that the improved trigonometric leveling net type can effectively eliminate the influence of atmospheric refraction error and meet the accuracy requirements of subway construction.
出处
《工程勘察》
2016年第10期52-56,共5页
Geotechnical Investigation & Surveying
基金
上海市自然科学基金项目(15ZR1443700)
