Limited by geological survey methods, processes, and cost, it has long been a difficult thing to accurately detect the position of landslide slip surface and monitor the landslide internal deformation. Fiber Bragg grating (FBG) sensing technology has been widely used in geological engineering and geotechnical engineering due to its high-precision property. In this research, FBG sensing technology was applied to the monitoring of landslide internal deformation in Toudu, Chongqing, China. The in situ monitoring by FBG accurately determined the position of the landslide slip surface. Based on the relationship between fiber grating strain and deflection, the formula between landslide internal deformation and fiber grating strain was obtained, and the rationality of the formula was verified by the monitoring data of surface displacement. Finally, the internal deformation at the monitoring point of the Toudu landslide was calculated and the mechanism of the landslide was analyzed.

中文翻译：

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FBG传感技术在滑坡内部变形监测中的应用

受地质调查方法，过程和成本的限制，长期以来很难准确地检测出滑坡面的位置并监测滑坡的内部变形。光纤布拉格光栅（FBG）传感技术因其高精度而被广泛用于地质工程和岩土工程。在这项研究中，FBG传感技术被用于监测重庆市投渡的滑坡内部变形。FBG进行的现场监测可准确确定滑坡滑动面的位置。根据光纤光栅应变与挠度的关系，推导了滑坡内部变形与光纤光栅应变的关系式，并通过地面位移监测数据验证了该公式的合理性。最后，