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METHODS article

Front. Built Environ.
Sec. Geotechnical Engineering
Volume 10 - 2024 | doi: 10.3389/fbuil.2024.1447428

Laboratory evaluation of calcareous sand specimens with inclined sedimentary surface

Provisionally accepted
AN Yongning AN Yongning 1,2LIU Hongjun LIU Hongjun 1*DONG Tong DONG Tong 3*LIU Chao LIU Chao 3*ZHANG Minsheng ZHANG Minsheng 1*
  • 1 College of Environmental Science and Engineering, Ocean University of China, Qingdao, Shandong Province, China
  • 2 Tianjin Research Institute of Water Transport Engineering, Tianjin, China
  • 3 Qingdao University of Technology, Qingdao, Shandong, China

The final, formatted version of the article will be published soon.

    Due to sedimentary processes, the natural and blown-filled calcareous sands are often deposited in inclined and layered formations. These calcareous sands are often in a complex stress state with rotating principal stress axes, leading to intricate mechanical properties. In order to investigate the mechanical behavior of calcareous sands with inclined sedimentary surfaces, a device was developed to prepare the hollow cylindrical specimens by using artificially crushed calcareous sands. Combining this with a hollow cylindrical torsional shear apparatus, undrained monotonic loading and pure principal stress rotation tests were conducted to investigate the static dynamic properties of inherently anisotropic calcareous sands. The results indicate that shear dilatancy property is related to the principal stress direction. The shear dilatancy of calcareous sands decreases as the direction of the principal stress increases.The peak stress ratio decreases with increasing principal stress direction and increases with increasing deposition direction. In the pre-cyclic loading period, the increase in the deposition direction led to an increase in the stability of the specimens and a decrease in the accumulation of excess pore pressure, which further affected the dynamic shear modulus and damping ratio of the calcareous sand. In the late stage of cyclic loading, the inherent anisotropy of the specimen is destroyed, so the excess pressure and hysteresis loop characteristics is beginning to converge.

    Keywords: calcareous sand, inclined sedimentary surface, Anisotropy, Laboratory tests, static and dynamic mechanical behavior

    Received: 11 Jun 2024; Accepted: 29 Oct 2024.

    Copyright: © 2024 Yongning, Hongjun, Tong, Chao and Minsheng. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence:
    LIU Hongjun, College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, Shandong Province, China
    DONG Tong, Qingdao University of Technology, Qingdao, 266300, Shandong, China
    LIU Chao, Qingdao University of Technology, Qingdao, 266300, Shandong, China
    ZHANG Minsheng, College of Environmental Science and Engineering, Ocean University of China, Qingdao, 266100, Shandong Province, China

    Disclaimer: All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.