Abstract
By installing FBG sensors on the geogrids, smart geogrids can both reinforce and monitor the stability for geogrid-reinforced slopes. In this paper, a geogrid-reinforced sand slope model test is conducted in the laboratory and fiber Bragg grating (FBG) sensing technology is used to measure the strain distribution of the geogrid. Based on the model test, the performance of the reinforced soil slope is simulated by finite element software Midas-GTS, and the stability of the reinforced soil slope is analyzed by strength reduction method. The relationship between the geogrid strain and the factor of safety is set up. The results indicate that the measured strain and calculated results agree very well. The geogrid strain measured by FBG sensor can be applied to evaluate the stability of geogrid-reinforced sand slopes.
Highlights
It is common to improve the stability of a slope using reinforced geosynthetics such as geogrids and geotextiles
The data agree well with each other, indicating that the fiber Bragg grating (FBG) could measure the strain of geogrid accurately
According to of numerical simulation, it was found that the stress/strain state as well as the According to numerical simulation, it was found that the stress/strain state as well as the stability condition of the geogrid reinforced slope changed under the action surcharge loads
Summary
It is common to improve the stability of a slope using reinforced geosynthetics such as geogrids and geotextiles. Zamara et al [11] successfully applied FBGs to measure the geosynthetic reinforced landfills in the field. Finitein element method numerical approach is oftenofused to simulate the behavior of The geogrids soft clay, and Li(FEM)-based et al [14] studied the viscous behavior geogrid-reinforced laboratory. A strength reduction methodand based on FEM reinforced body, which arethe helpful for theRecently, investigation of the deformation failure lawswas of developed. Helpful investigation of the deformation and failure lawsgeogrid-reinforced of geogrid-reinforced slopes In this in paper, a static loading test on were a medium-sized geogrid-reinforced slope model was conducted the laboratory. FBG sensors installed along the geogrid to measure its strain conducted in the laboratory.
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