南京长江第四大桥基准索股架设的垂度测量

摘要

The influence factors of datum strand erection is analyzed , and it elaborates the sag measurement process of the datum strand.The paper introduces the sag measurement method , which bases on one -way atmospheric refraction coefficient correction .It proves the surveying method is correct , and the datum strand reaches the requirements of adjusting and stable observation .The method has the model significance to other suspension bridge .%分析了影响基准索股垂度的主要因素，并阐述了基准索股垂度测量的流程；提出了基于单向大气折光系数改正的垂度测量方法。实践表明，该测量方法正确，基准索股达到了调整及稳定观测的要求，对其他悬索桥施工有借鉴意义。