摘要
研究目的:针对郑西客运专线湿陷性黄土区路基工后沉降控制的特殊要求,分析采用既有2种路基工后沉降监测方案存在的不足。根据光纤光栅传感技术的发展和在土木工程监测中的研究与应用,探讨光纤光栅传感器沉降监测系统在客运专线湿陷性黄土区路基工后沉降监测中应用的可行性。研究结论:通过分析与探讨,采用光纤光栅传感器沉降监测系统,可实现长距离(50 km)准分布、多测点、多参量的测量,测量精度高,可精确测出小于0.1 mm(相对基准点)的垂直位移的变化,适于长期实时监测,且不受电磁干扰。能满足郑西客运专线湿陷性黄土区路基进行长期工后沉降监测的要求。
Research purposes： According to the special requirements of monitoring the post-construction subsidence of the subgrade of Zhengzhou-Xi＇an Passenger Dedicated Line in moist loess area,the analysis of the defects of the existing two schemes for monitoring post-construction subsidence is made.Based on the technology development and research of fibre light grid transducer and its monitoring application in civil engineering,the discussion is made on the possibility of using the fibre light grid transducer to monitor the post-construction subsidence of the subgrade of the passenger dedicated line in moist loess area.Research conclusions：From the analysis and discussion it is concluded the fibre light grid transducer can realize long-distance（50m）,quasi-distributed,multi-spots and multi-parameter measurement with the high measurement accuracy.It can accurately measure the vertical displacement change of less than 0.1mm（relative to the reference base）,and it is suitable for long-term monitoring with the good capacity of electromagnetic interference resistance and can satisfy the requirement of long-term monitoring the post-construction subsidence of subgrade of Zhengzhou-Xi＇an Passenger Dedicated Line in moist loess area.
出处
《铁道工程学报》
EI
北大核心
2010年第3期33-36,共4页
Journal of Railway Engineering Society
关键词
湿陷性黄土区
客运专线
工后沉降
光纤光栅传感器
基桩控制网
moist loess area
passenger dedicated line
post-construction subsidence
fibre light grid transducer
foundation-pile control network
