Development and application of multifunctional shear test apparatus for rock discontinuity under dynamic disturbance loading

CUI Guo-jian; ZHANG Chuan-qing; ZHOU Hui; LU Jing-jing; GAO Yang; HU Ming-ming; HU Da-wei

doi:10.16285/j.rsm.2021.6592

Rock and Soil Mechanics (Jun 2022)

Development and application of multifunctional shear test apparatus for rock discontinuity under dynamic disturbance loading

CUI Guo-jian,
ZHANG Chuan-qing,
ZHOU Hui,
LU Jing-jing,
GAO Yang,
HU Ming-ming,
HU Da-wei

Affiliations

CUI Guo-jian: 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China 2. University of Chinese Academy of Sciences, Beijing 100049, China
ZHANG Chuan-qing: 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China 2. University of Chinese Academy of Sciences, Beijing 100049, China
ZHOU Hui: 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China 2. University of Chinese Academy of Sciences, Beijing 100049, China
LU Jing-jing: 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China 2. University of Chinese Academy of Sciences, Beijing 100049, China
GAO Yang: 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China 2. University of Chinese Academy of Sciences, Beijing 100049, China
HU Ming-ming: 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China 2. University of Chinese Academy of Sciences, Beijing 100049, China
HU Da-wei: 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China 2. University of Chinese Academy of Sciences, Beijing 100049, China

DOI: https://doi.org/10.16285/j.rsm.2021.6592
Journal volume & issue: Vol. 43, no. 6
pp. 1727 – 1737

Abstract

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Dynamic disturbance is an important influence factor that causes the sliding instability of rock discontinuity and then triggers strong dynamic geological disasters, such as earthquakes and rock bursts. In order to study the mechanical response and disaster-causing mechanism of rock discontinuity under dynamic disturbance loading, a multifunctional shear test apparatus for rock discontinuity under dynamic disturbance loading (DDST-1800) is independently developed. The test apparatus is composed of normal and shear loading units with quasi-static loading, various normal boundary conditions, dynamic disturbance loading with complex and wide-frequency waveform (0.5−50 Hz), and wide-range shear velocity loading (0.000 1−10 mm /s) functions, pendulum impact system, cyclic shear box unit, data acquisition and control units. This apparatus can conduct the following typical tests by programmed operations: a monotonic or cyclic direct shear test of rock discontinuity under Constant Normal Load (CNL), Constant Normal Stiffness (CNS), Unloading Normal Load (UNL), Variable Normal Stiffness (VNS), and Dynamic Normal Load (DNL) boundary conditions with different shear velocity, superimposed dynamic disturbance shear test of rock discontinuity in both normal and tangential directions of rock discontinuity under pre-set normal and shear stress conditions, velocity and stress step tests, and pendulum hammer-driven impact test of rock discontinuity under pre-set normal and shear stress conditions. Preliminary experimental studies were carried out and the results verified the stability and accuracy of the new apparatus. The research and development of the new apparatus have important scientific significance and engineering value for clarifying the dynamic response characteristics of rock discontinuity under dynamic disturbance loading and deeply understanding the triggering effect and activation instability mechanism of strong dynamic geological disasters such as earthquakes and rock bursts related to rock discontinuity.

Published in Rock and Soil Mechanics

ISSN: 1000-7598 (Print)
Publisher: SCIENCE PRESS , 16 DONGHUANGCHENGGEN NORTH ST, BEIJING, PEOPLES R CHINA, 100717
Country of publisher: China
LCC subjects: Technology: Engineering (General). Civil engineering (General): Engineering geology. Rock mechanics. Soil mechanics. Underground construction
Website: http://rocksoilmech.whrsm.ac.cn/EN/1000-7598/home.shtml

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