Stability Evaluation of Vegetation-Covered Highway Slopes Employing Integrated CR-InSAR and Finite Element Simulation.
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| Title: | Stability Evaluation of Vegetation-Covered Highway Slopes Employing Integrated CR-InSAR and Finite Element Simulation. |
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| Authors: | Peng, Wei1 (AUTHOR), Zhou, Jiachen1,2 (AUTHOR), Zhang, Junhui2,3 (AUTHOR) zjhseu@163.com, Zhu, Jun1 (AUTHOR), Xing, Xuemin1,2 (AUTHOR), Zhang, Shiping2,3 (AUTHOR) |
| Source: | Remote Sensing. May2026, Vol. 18 Issue 9, p1350. 19p. |
| Subjects: | Slope stability, Slopes (Soil mechanics), Finite element method, Precast concrete construction, Safety factor in engineering |
| Abstract: | Highlights: What are the main findings? CR-InSAR enables high-precision monitoring of vegetated highway slopes, achieving an RMSE of <0.3 mm against in situ sensors and capturing annual deformation rates of 0.1–0.4 mm/y. InSAR-constrained finite element strength reduction method shows that the current strength reduction factors are 0.11 and 0.12, which are far lower than the critical strength reduction factors of 1.28 and 1.22 for complete failure, which indicates that the cast-in-place and prefabricated frame beams demonstrated comparable support effectiveness. What are the implications of the main findings? The integrated CR-InSAR and finite element framework provides a replicable method for quantitative stability assessment of vegetated slopes, overcoming the limitations of traditional inspections and InSAR in low-coherence areas. Field-validated equivalence of prefabricated and cast-in-place frame beams offers strong support for promoting low-carbon, efficient prefabricated technologies in mountainous highway construction. Highway slopes susceptible to landslides are typically reinforced by vegetation cover and the application of concrete frame beams, but vegetation cover may degrade the accuracy of InSAR deformation monitoring. We installed artificial corner reflectors (CRs) on the frame beams and assessed the stability of the vegetated slope using finite element simulation constrained by InSAR deformation data. A study was conducted on a typical landslide-risk slope within the K87 + 391.5–K87 + 565 section of the Guihuang highway, which is reinforced with cast-in-place and prefabricated concrete beams. Experimental results demonstrate that two adjacent corner reflectors (CRs) on the two types of frame beams of the slope can be successfully identified, with deformation rates ranging from 0.1 to 0.4 mm/y, and the root mean square error (RMSE) of discrepancies between CR-InSAR measurements and slope displacement monitoring sensors is less than 0.3 mm. Meanwhile, the current strength reduction factor values for slopes reinforced with cast-in-place and prefabricated concrete beams, as constrained by InSAR multi-dimensional deformation, are 0.11 and 0.12, respectively which are much lower than the critical strength reduction factors of 1.28 and 1.22 corresponding to full coalescence of plastic strain from the slope toe to the slope crest, which indicates that the cast-in-place and prefabricated frame beams exhibit comparable support performance. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | Highlights: What are the main findings? CR-InSAR enables high-precision monitoring of vegetated highway slopes, achieving an RMSE of <0.3 mm against in situ sensors and capturing annual deformation rates of 0.1–0.4 mm/y. InSAR-constrained finite element strength reduction method shows that the current strength reduction factors are 0.11 and 0.12, which are far lower than the critical strength reduction factors of 1.28 and 1.22 for complete failure, which indicates that the cast-in-place and prefabricated frame beams demonstrated comparable support effectiveness. What are the implications of the main findings? The integrated CR-InSAR and finite element framework provides a replicable method for quantitative stability assessment of vegetated slopes, overcoming the limitations of traditional inspections and InSAR in low-coherence areas. Field-validated equivalence of prefabricated and cast-in-place frame beams offers strong support for promoting low-carbon, efficient prefabricated technologies in mountainous highway construction. Highway slopes susceptible to landslides are typically reinforced by vegetation cover and the application of concrete frame beams, but vegetation cover may degrade the accuracy of InSAR deformation monitoring. We installed artificial corner reflectors (CRs) on the frame beams and assessed the stability of the vegetated slope using finite element simulation constrained by InSAR deformation data. A study was conducted on a typical landslide-risk slope within the K87 + 391.5–K87 + 565 section of the Guihuang highway, which is reinforced with cast-in-place and prefabricated concrete beams. Experimental results demonstrate that two adjacent corner reflectors (CRs) on the two types of frame beams of the slope can be successfully identified, with deformation rates ranging from 0.1 to 0.4 mm/y, and the root mean square error (RMSE) of discrepancies between CR-InSAR measurements and slope displacement monitoring sensors is less than 0.3 mm. Meanwhile, the current strength reduction factor values for slopes reinforced with cast-in-place and prefabricated concrete beams, as constrained by InSAR multi-dimensional deformation, are 0.11 and 0.12, respectively which are much lower than the critical strength reduction factors of 1.28 and 1.22 corresponding to full coalescence of plastic strain from the slope toe to the slope crest, which indicates that the cast-in-place and prefabricated frame beams exhibit comparable support performance. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 20724292 |
| DOI: | 10.3390/rs18091350 |
