动荷载作用下三轴试样的体积与全表面变形测量方法

doi:10.13722/j.cnki.jrme.2022.0846

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Abstract Volume and deformation measurement is in great significance for characterizing soil and rock mechanical behavior. In this paper，a new dynamic image-based multi-camera and multi-media photogrammetric method is proposed to measure soil deformation during triaxial testing under dynamic loading. With videos captured by multiple cameras from different view angles，dynamic images can be extracted. Together with the camera calibration results based on dynamic images and the multi-media photogrammetric method，volume and deformation of soil during triaxial testing can be measured under dynamic loading. With help of a six single lens reflex camera video capturing system，triaxial test was conducted on a steel cylinder and two silt specimens to validate the feasibility and full-field deformation measurement capability of the proposed method. Triaxial test on steel cylinder shows that the volume measurement can be made based on dynamic images at a high accuracy. The result from the triaxial test on silt specimens demonstrates that the proposed method is capable of continuous soil volume and full-field deformation measurement under dynamic loading. The proposed method overcomes the limitations associated with the conventional methods and extends the application of the multi-media photogrammetric method from static loading condition to dynamic loading condition. Continuous volume and full-field deformation measurement are beneficial for advanced characterization of soil behavior under dynamic loading.

Key words： soil mechanics dynamic load multi-media photogrammetry triaxial test full-field deformation

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	Articles by authors
	HE Shiyu
	LI Lin
	CHEN Zhenwang
	SHEN Keren

Cite this article:

HE Shiyu,LI Lin,CHEN Zhenwang, et al. Volume and full-field deformation measurement on triaxial specimen during dynamic loading[J]. , 2023, 42(7): 1811-1820.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2022.0846 OR https://rockmech.whrsm.ac.cn/EN/Y2023/V42/I7/1811

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