中文摘要：

地裂缝监测是科学防治和有效治理地裂缝灾害必不可少的工作之一。本文结合现场工程实例,将基于BOTDR和FBG的定点分布式光纤传感监测技术应用于裂缝监测领域,详细介绍了BOTDR和FBG定点分布式感测原理,对感测光缆进行了室内标定试验,并以江阴市地裂缝为监测点进行了现场测试试验。结果表明：基于BOTDR与FBG的定点分布式光纤传感技术可有效捕捉到分布于2个定点间地裂缝的发生和发展过程;能有效的对已发育地裂缝进行监测,并能较好地预测潜在的地裂缝发育趋势,该技术稳定性好,测量精度可以达到0.15mm;通过网络化铺设方式加强地裂缝活跃区域的监测,提高地裂缝监测的密度,因此该技术在地裂缝监测领域有着较好的应用前景,对防治该类型地质灾害具有很好的现实意义。

英文摘要：

The monitoring plays an important role in the prevention and management of ground fissures. In this study,BOTDR and FBG fixed-point distributed optical fiber sensor monitoring technology is used to monitor ground fissures,fixed-point distributed sensing principle based BOTDR and FBG is introduced,calibration test of sensing cable is carried out,and field monitoring of ground fissures located on Jiangyin is studied. The results showed that the occurrence and development of ground fissures between two points can be obtained by BOTDR and FBG fixed-point distributed optical fiber sensor monitoring technology,the developed ground fissures and its trends can be given effectively,this technology has good stability and its measurement accuracy is 0. 15 mm. The monitoring density of ground fissures can be improved by means of gridded laying of optical fiber. Therefore,it is a good prospect to use this technology in the monitoring of ground fissures and the prevention of the geological disasters.