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地学领域高质量科技期刊分级T2区（2023）

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Volume 44 Issue 1
Jan.  2025
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Article Navigation >  Bulletin of Geological Science and Technology  > 2025  >  44(1): 205-215
CHEN Qiong，CUI Deshan，ZHANGYANG Jinghao，et al. Development and application of a novel ring shear apparatus[J]. Bulletin of Geological Science and Technology，2025，44（1）：205-215 doi: 10.19509/j.cnki.dzkq.tb20230340
Citation: CHEN Qiong，CUI Deshan，ZHANGYANG Jinghao，et al. Development and application of a novel ring shear apparatus[J]. Bulletin of Geological Science and Technology，2025，44（1）：205-215 doi: 10.19509/j.cnki.dzkq.tb20230340
shu

Development and application of a novel ring shear apparatus

doi: 10.19509/j.cnki.dzkq.tb20230340
  • 1.

    Faculty of Engineering, China University of Geosciences (Wuhan), Wuhan 430074, China

  • 2.

    Yongchang Science and Education Instrument Manufacturing Co. Ltd., Changzhou Jiangsu 213300, China

More Information
  • Author Bio:

    E-mail：chenqiong@cug.edu.cn

  • Corresponding author: E-mail: cuideshan@cug.edu.cn
  • Received Date: 14 Jun 2023
  • Accepted Date: 07 Oct 2023
  • Rev Recd Date: 30 Sep 2023
    • Available Online: 16 Jul 2024
    Abstract
  • Objective

    This study aims to investigate the total stress, pore water pressure, and effective stress of samples by developing a new ring shear apparatus capable of measuring and controlling pore water pressure, effectively revealing the evolution characteristics of stress, strain, and pore water pressure in the samples.

    Methods

    A self-developed automatic ring shear apparatus that can control drainage conditions has achieved the control of pore water pressure during ring shear tests, and measuring parameters such as pore water pressure, sample drainage volume, torque, and axial displacement. Taking the Huangtupo landslide slip zone soil as an example, consolidation drained ring shear tests, consolidation undrained ring shear tests, variable pore pressure ring shear tests, and permeability tests were conducted separately.

    Results

    The results demonstrated that the ring shear chamber withstands pore water pressure from 0 to 1000 kPa using a side seal and three-way valves at the top and bottom. When the inlet valve at the bottom of ring shear box was opened and the volume pressure controller was controlled, the pore water pressure can be controlled, and the sample drainage or absorption volume under various pore pressures can be measured. With the outlet valve at the upper ring shear box opened, and a pore water pressure sensor connected, the undrained pore water pressure was measured in the range of 0-1000 kPa. During the test, the shear expansion and contraction were measured by an axial displacement sensors, with range of 0-10 mm, while ring shear force was measured with a torque sensor up to 300 N·m. Additionally, the new ring shear apparatus can be used to conduct tests on the influence of dynamic changes in pore water pressure on ring shear strength, as well as the constant head permeability during consolidation or ring shear processes.

    Conclusion

    The novel ring shear apparatus can accurately conduct ring shear tests on samples under large deformation and varying pore pressure conditions, offering technical support for revealing the evolution mechanism of pore water pressure during long-distance landslide sliding.

     

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