Study of a Triaxial Testing System for Unsaturated Subgrade Fillers Using a High-Suction Tensiometer and Photogrammetry
This study examines a triaxial testing system for unsaturated subgrade fillers, utilizing a high-suction tensiometer and photogrammetry to more accurately simulate and analyze their mechanical behavior. Digital image correlation (DIC) technology is combined with non-contact photogrammetry, employing...
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MDPI AG
2025-05-01
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| Online Access: | https://www.mdpi.com/2076-3417/15/10/5380 |
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| author | Yiru Hu Xianzhang Ling |
| author_facet | Yiru Hu Xianzhang Ling |
| author_sort | Yiru Hu |
| collection | DOAJ |
| description | This study examines a triaxial testing system for unsaturated subgrade fillers, utilizing a high-suction tensiometer and photogrammetry to more accurately simulate and analyze their mechanical behavior. Digital image correlation (DIC) technology is combined with non-contact photogrammetry, employing a multi-ray tracing method to reconstruct the 3D model of the sample and monitor its volume changes. Real-time matric suction is measured using a high-suction tensiometer, avoiding traditional suction control methods and enabling a more accurate reproduction of deformation and suction changes in unsaturated soil samples under natural conditions. This study further analyzes key parameters, such as specific volume change, suction change, and shear failure state, under varying moisture content and stress conditions, with parameter calibration for mechanical behavior performed using the BBM model. This system significantly reduces traditional experimental time, offering a new tool for studying the mechanical behavior of unsaturated subgrade fillers, with substantial theoretical value and practical application potential. |
| format | Article |
| id | doaj-art-588cf2ccf9e145c1a25d4d743ed3f456 |
| institution | OA Journals |
| issn | 2076-3417 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj-art-588cf2ccf9e145c1a25d4d743ed3f4562025-08-20T01:56:20ZengMDPI AGApplied Sciences2076-34172025-05-011510538010.3390/app15105380Study of a Triaxial Testing System for Unsaturated Subgrade Fillers Using a High-Suction Tensiometer and PhotogrammetryYiru Hu0Xianzhang Ling1School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, ChinaSchool of Civil Engineering, Harbin Institute of Technology, Harbin 150090, ChinaThis study examines a triaxial testing system for unsaturated subgrade fillers, utilizing a high-suction tensiometer and photogrammetry to more accurately simulate and analyze their mechanical behavior. Digital image correlation (DIC) technology is combined with non-contact photogrammetry, employing a multi-ray tracing method to reconstruct the 3D model of the sample and monitor its volume changes. Real-time matric suction is measured using a high-suction tensiometer, avoiding traditional suction control methods and enabling a more accurate reproduction of deformation and suction changes in unsaturated soil samples under natural conditions. This study further analyzes key parameters, such as specific volume change, suction change, and shear failure state, under varying moisture content and stress conditions, with parameter calibration for mechanical behavior performed using the BBM model. This system significantly reduces traditional experimental time, offering a new tool for studying the mechanical behavior of unsaturated subgrade fillers, with substantial theoretical value and practical application potential.https://www.mdpi.com/2076-3417/15/10/5380unsaturated subgrade fillhigh tensiometerphotogrammetrytriaxial testing |
| spellingShingle | Yiru Hu Xianzhang Ling Study of a Triaxial Testing System for Unsaturated Subgrade Fillers Using a High-Suction Tensiometer and Photogrammetry Applied Sciences unsaturated subgrade fill high tensiometer photogrammetry triaxial testing |
| title | Study of a Triaxial Testing System for Unsaturated Subgrade Fillers Using a High-Suction Tensiometer and Photogrammetry |
| title_full | Study of a Triaxial Testing System for Unsaturated Subgrade Fillers Using a High-Suction Tensiometer and Photogrammetry |
| title_fullStr | Study of a Triaxial Testing System for Unsaturated Subgrade Fillers Using a High-Suction Tensiometer and Photogrammetry |
| title_full_unstemmed | Study of a Triaxial Testing System for Unsaturated Subgrade Fillers Using a High-Suction Tensiometer and Photogrammetry |
| title_short | Study of a Triaxial Testing System for Unsaturated Subgrade Fillers Using a High-Suction Tensiometer and Photogrammetry |
| title_sort | study of a triaxial testing system for unsaturated subgrade fillers using a high suction tensiometer and photogrammetry |
| topic | unsaturated subgrade fill high tensiometer photogrammetry triaxial testing |
| url | https://www.mdpi.com/2076-3417/15/10/5380 |
| work_keys_str_mv | AT yiruhu studyofatriaxialtestingsystemforunsaturatedsubgradefillersusingahighsuctiontensiometerandphotogrammetry AT xianzhangling studyofatriaxialtestingsystemforunsaturatedsubgradefillersusingahighsuctiontensiometerandphotogrammetry |