MATEC Web Conf.
Volume 275, 20191st International Conference on Advances in Civil Engineering and Materials (ACEM1) and 1st World Symposium on Sustainable Bio-composite Materials and Structures (SBMS1) (ACEM2018 and SBMS1)
|Number of page(s)||9|
|Section||Geotechnical and Tunnel Engineering|
|Published online||13 March 2019|
Vision-based Deformation Measurement for Pile-soil Testing
1 Economy and Technology Research Institute, State Grid Hunan Electric Power Company, Changsha, Hunan, 410004, China
2 School of Civil Engineering, Southeast University, Nanjing, Jiangsu, 211100, China
* Corresponding author: Shanshan Yu, firstname.lastname@example.org
Image measurement technology has been widely used in monitoring the deformation of the soil field around the pile with its advantages of no damage, no contact, full-field measurement, no added quality and high sensitivity. But there are few researches on image-based bearing deformation measurement of the pile. Through an indoor pile-soil semi-model test, the rigid body displacement and load-bearing deformation of a new type of prefabricated steel tube pile foundation under horizontal load was measured based on image features. In this study, the concept of optical extensometer is first applied to the measurement of local average strain of a non-uniform deformed structure. Based on an improved feature point tracking algorithm SURF-BRISK, non-contact measurement of tiny strain of pile body is realized. In addition, based on DIC technology, this study also obtained the progressive development of displacement field of soil around pile. The above work fully reflects the non-contact convenience and full-field richness of the optical measurement method compared with the traditional measurement method.
© The Authors, published by EDP Sciences, 2019
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