基于FBG技术的土体分层沉降仪试验研究

Study of the instrument for layered soil settlement monitoring based on FBG technology

提出了一种测量土体分层沉降的新技术,基于该技术研制的土体分层沉降仪,可以实现对土体分层沉降的实时在线监测。在某人工岛进行现场试验,建立了以沉降仪为基础的自动监测系统。试验研究表明,经过标定装置标定后的沉降仪,可以精确获得土体分层沉降数据,其测量结果与传统测量方法所得沉降变化趋势基本一致。该技术通过计算机实现了监测数据的自动采集,在一定程度上避免了人工读数所造成的人为误差影响,所采集数据精确、稳定、连续,对野外现场监测具有较好的适用性。

A new method is proposed that can be used to monitor the layered settlement of foundation soil mass. Based on the new technology,the layered settlement monitoring gauge is developed which can realize realtime on-line monitoring of the foundation soil mass. By using the settlement monitoring gauges,an automatic monitoring system is established in one artificial island to collect field data. The field tests indicate that the calibrated settlement gauge can obtain measurements accurately,and the settlement trend agrees well with that of the traditional method. The new technology implements the automatic data collecting that is accurate,stable and continuous by using the computer,and avoids the artificial errors of traditional method. The new method is applicable for the field settlement monitoring.