摘要
岩石变形过程复杂，且受环境因素的影响，而影响其破坏的初期损伤状态是关键。光纤光栅技术近几年发展迅速，在单点的基础上发展起来的多点光纤光栅传感技术，可以将光栅点构成阵列式布置。鉴于此，本文首次将多点光纤光栅传感技术用于岩石变形过程的检测中，将多个光栅点阵列布置于相似模型的岩层中，通过实验研究了岩石变形与光栅点波长变化的初步关系。这一研究对检测岩石小变形及监测岩土工程的安全性具有重要意义。
The course of rock deformation is complicated and easily influenced by environment factor and the key is the initial damage state that influences the fracture. Recently, the fiber grating sensing technology developed quickly, especially the fiber grating multi - point sensing which is based on the single - point technology and has more particular character, and the gratings can be laid in array. In view of this, the fiber grating multi- point technology is firstly applied to monitor the course of rock deformation in this paper. The fiber gratings are embedded in the rock layers of simulation model in array. By experiment, the preliminary relation between the rock deformation and the wavelength drift of gratings is studied. The study has important significance to detect the small deformation of rock and monitor the safety in geotechnical engineering.
出处
《地下空间与工程学报》
CSCD
2005年第6期986-989,共4页
Chinese Journal of Underground Space and Engineering
基金
国家自然科学基金（503740155）和陕西省重点实验室科研项目（02JS43）.
关键词
光纤光栅
传感技术
相似材料模型
波长
Fiber Bragg Grating （FBG）
sensing technology
analogy material model
wavelength
