Pressure-preserving conventional triaxial compression loading apparatus and method for performing conventional triaxial compression test on pressure-preserving specimen using same

US11692918B2 · kind B2 · utility

Assignee

• China University of Mining and Technology-Beijing · CN

Inventors

• Ruidong Peng · Beijing, CN
• Hongwei Zhou · Greenville, US
• Wenhao Jia · Xi'an, CN
• Yu Yang · Beijing, CN
• Kai Si · Beijing, CN
• Jianqiang Wang · Shanghai, CN

Key dates

• Filing date: May 31, 2022
• Grant date: Jul 4, 2023
• Expiry date: May 31, 2042

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E30/30
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A pressure-preserving conventional triaxial compression loading apparatus of the present invention includes a pressure vessel, an upper piston rod, a lower piston rod, and an annular oil bag assembly. Hollow chambers of the pressure vessel in vertical communication sequentially include an upper chamber, an upper sealed chamber, a confining pressure chamber, a lower sealed chamber, and a lower chamber from top to bottom. The annular oil bag assembly is placed in the confining pressure chamber. When an annular inner chamber of an annular oil bag is filled with medium, an outer wall of the annular oil bag and an inner wall of the confining pressure chamber are attached together. A fidelity specimen is placed in a specimen chamber defined by a lower end surface of the upper piston rod, an upper end surface of the lower piston rod, and an inner wall of the annular oil bag. A variety of measuring sensors are disposed in the annular inner chamber of the annular oil bag. The pressure-preserving conventional triaxial compression loading apparatus of the present invention may accommodate a fidelity specimen, and use the annular oil bag assembly and the upper and lower piston rods to perform …