Soil settlement monitoring and evaluating device based on FBG temperature sensor

The utility model provides a soil settlement monitoring and evaluating device based on an FBG (Fiber Bragg Grating) temperature sensor, which belongs to the technical field of land reclamation and comprises a chassis, an optical fiber sensor, a thermal insulation disc and a monitoring mechanism. The chassis is buried in soil to be detected; the plurality of optical fiber sensors are connected to the chassis, and the optical fiber sensors generate corresponding wavelength change signals through temperature change caused by soil layer settlement; the plurality of thermal insulation discs are arranged on the plurality of optical fiber sensors in a one-to-one correspondence manner, and the thermal insulation discs are used for blocking the influence of the external environment on the soil temperature; the monitoring mechanism comprises an optical fiber modulation-demodulation instrument and a display module which are electrically connected with each other, and the optical fiber modulation-demodulation instrument