摘要
既有拱桥在检测时,拱圈竖向线形测量工作量大、危险性高、操作不方便,为解决这个难题,提出一种在拱桥侧面适当位置架设免棱镜全站仪测量拱圈竖向线形的方法,并给出详细操作步骤。分析该方法测量误差的主要来源,并根据误差传播定律,推导拱圈竖向线形测量中误差的计算公式。工程实例证明,该方法具有简单、实用价值高、适应性强等优点,是桥梁拱圈竖向线形检测的一种较好方法。
For detection of existing arch bridges,the measurement for vertical linetypes faces large workload,high danger and inconvenient operation.To solve this problem,this paper proposes a method of setting up a total-station instrument without prism at proper position on the side of bridge arch to measure vertical line types and gives out detailed operating steps;analyzes main sources of measurement errors of this method and deduces computational formulae for errors in measurement for vertical line types of arch rings according to the law of propagation of errors.Project examples prove this method has advantages of simplicity,high practical value and strong adaptability,etc.and is a better method of detection for vertical line types of bridge arch rings.
出处
《公路交通技术》
2012年第4期94-97,共4页
Technology of Highway and Transport
基金
山区桥梁与隧道工程国家重点实验室培育基地开放基金(CQSLBF-Y11-4)
重庆市教育委员会科学技术研究项目(KJ120402)
关键词
拱圈
免棱镜
竖向线形
精度
arch ring
without prism
vertical line type
accuracy
