GNSS在大型桥梁施工控制测量中的应用  

Application of GNSS in control surveying for large-scale bridge construction

作　　者：何洪涛[1] HE Hongtao(Sichuan Road and Bridge Engineering Co.,Ltd.,Chengdu 610017,China)

机构地区：[1]四川路桥桥梁工程有限责任公司,四川成都610017

出　　处：《经纬天地》2025年第2期45-49,共5页Survey World

摘　　要：桥梁施工工程中存在地基不稳定、土壤沉降等潜在风险,同时,对控制网的精度有着严格的要求,因此需要采取更加高效精确的监测方法进行施工控制测量。针对传统桥梁施工控制测量方法计算效率和精度较低的问题,设计出一种基于全球导航卫星系统的大型桥梁施工控制测量方法,并将其应用于嘉陵江特大桥的施工控制中。结果表明:使用设计方法计算出的最弱点位中误差最大值为0.15 cm,且各控制点的Vx、Vy和Vp值普遍小于无约束平差条件下的Vx、Vy、Vp值,有约束平差条件和无约束平差条件的最大较差为0.31 cm,最大距离较差为0.0036 m,说明其精度较高。试验结果证明了设计方法的有效性和可靠性,为大型桥梁的施工质量控制提供了有力的技术支持。The potential risks such as unstable foundation and soil settlement are existed in bridge construction engineering.At the same time,there are strict requirements for the accuracy of the control network,therefore more efficient and accurate monitoring methods are needed to adopt for construction control measurement.In response to the problems as poor stability and low accuracy of traditional bridge construction control measurement methods,a large-scale bridge construction control measurement method based on global positioning system has been designed and applied in the construction control of the Jialing River Extra Large Bridge.The results showed that the maximum mean square error of the weakest point calculated by the design method was 0.15 cm and the Vx,Vy and Vp values of each control point were generally lower than those under unconstrained adjustment conditions.The maximum difference between constrained and unconstrained adjustment conditions was 0.31 cm and the maximum distance difference was 0.0036 m,both of them indicate higher accuracy.The experimental results have demonstrated the effectiveness and reliability of the design method provide strong technical support for the construction quality control of large bridges.

关 键 词：全球导航卫星系统 桥梁施工 控制测量 

分 类 号：P228[天文地球—大地测量学与测量工程] P258[天文地球—测绘科学与技术]