高速公路GPS控制网优化设计

Optimization design on the expressway GPS control network

以福建高速永武龙岩段的实际工程为例,基于GPS定位技术,进行了控制网的优化设计。根据GPS网中观测矩阵与统计检验功效、显著水平,推导出基线测量内、外可靠性指标计算公式。根据控制网的灵敏性指标,将原测量方案中的21条独立基线优化为13条独立基线,测量并计算了每一条基线的内、外可靠性。研究结果表明:大多数GPS优化方案基线可靠性高于原实际方案基线可靠性。

Yongwu-Longyan Highway section in Fujian was taken as an engineering example,GPS positioning technology is applied to the optimal design of control network.According to the observation matrix,the statistical test efficacy and the significant levelin the GPS network,the calculation formula of the internal and external reliability indexare derived. According to the sensitivity index of the control network, 21 independentbaselines in the original measurement scheme are optimized to be 13 independent baselines.The internal and external reliability of each baseline is measured and calculated.The results show that the baseline reliability of GPS optimization scheme is higher thanthat of the original scheme.