为了开发一种高密度实时监测技术，用于及时了解隧道开挖面前方地层的变形情况，在分布式光纤监测技术的已有成果基础上，采用模型设计、室内试验与应用工艺验证的方法，研究开发一种用于土质隧道围岩超前位移监测的方法，得出监测力学模型与监测方程，提出传感器的制作与标定、布设与安装，系统集成与实时监测的工艺技术。研究成果在工程实践应用中得到了验证，取得了初步的应用效果。

The purpose of the paper is to develop a kind of highfrequency realtime monitoring technology so as to insight into the deformation of the ground ahead of the tunnel face. Model design, indoor experiment and application verification are made on basis of the study results of distributed optical fiber monitoring technology. In the end, a kind of technology that can monitor the deformation of ground ahead of the face of soil tunnels is developed, the mechanical model of the monitoring and the monitoring equation are achieved, and the technology of the fabrication and calibration of the optial fiber sensors, the layout and installation of the sensors, and the system integration and realtime monitoring are proposed. The study results have been applied in actual works and good effects have been achived. 