Geologic Monitoring of Transformer Substation by Two-Diaphragm Fiber Bragg Grating Earth Pressure Sensor

Abstract

The anti-slide pile and retaining wall are important supporting structure in Slope engineering, and the landslide will happen when the supporting structure cannot support the thrust of landslip. In order to improve survey effects, we take an on-line long time surveying about the anti-slide piles and retaining walls of Yanjin transformer substation to guarantee the safety of power system, and the surveying technology supply an effective way to test the geologic safety. According to the location of anti-slide piles, the 20 earth pressure sensors are separately fixed on the 5 upper anti-slide piles and the 10 lower anti-slide piles and concrete. The surveys of upper reaches indicate that the 3# sensor gets the maximum pressure 129.94KPa in Sep.28th, 2011, and the 6# sensor gets the minimum value 29.50KPa in Jan.31th, 2011. The surveys of downstream indicate that the 2# sensor gets the maximum pressure 1404.54KPa in Aug.21th, 2011, and the 6# sensor gets the minimum value 17.24KPa in Mar.26th, 2011. Combined with the local precipitation during the rainy season in 2011, the earth pressure is followed the change of precipitation.