Determination of Strength and Deformation Properties of Columnar Jointed Rock Mass Using Physical Model Tests

2018 ◽  
Vol 22 (9) ◽  
pp. 3302-3311 ◽  
Author(s):  
Zhinan Lin ◽  
Weiya Xu ◽  
Wei Wang ◽  
Huanling Wang ◽  
Rubin Wang ◽  
...  
Keyword(s):  
Rock Mass ◽  
Physical Model ◽  
Jointed Rock ◽  
Jointed Rock Mass ◽  
Model Tests ◽  
Physical Model Tests ◽  
Deformation Properties ◽  
Columnar Jointed Rock Mass ◽  
Strength And Deformation

Anisotropic characteristic of irregular columnar-jointed rock mass based on physical model test

2016 ◽  
Vol 21 (5) ◽  
pp. 1728-1734 ◽  
Author(s):  
Zhinan Lin ◽  
Weiya Xu ◽  
Huanling Wang ◽  
Jiuchang Zhang ◽  
Wang Wei ◽  
...  
Keyword(s):  
Rock Mass ◽  
Physical Model ◽  
Model Test ◽  
Jointed Rock ◽  
Jointed Rock Mass ◽  
Physical Model Test ◽  
Columnar Jointed Rock Mass

scholarly journals Study on the mechanical behaviour of Columnar Jointed Rock Mass under uniaxial compression state

2021 ◽  
Vol 861 (7) ◽  
pp. 072106
Author(s):  
Z P Xiang ◽  
S L Huang ◽  
H L Wang ◽  
W Y Xu ◽  
X L Ding ◽  
...  
Keyword(s):  
Rock Mass ◽  
Uniaxial Compression ◽  
Mechanical Behaviour ◽  
Jointed Rock ◽  
Jointed Rock Mass ◽  
Columnar Jointed Rock Mass

scholarly journals The Method of Determining Excavation Damaged Zone by Acoustic Test and the Application in Engineering Cases

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Qian-Cheng Sun ◽  
Hao-Sen Guo ◽  
Zhi-Hua Xu ◽  
Yue Liu ◽  
Xiao Xu
Keyword(s):  
Rock Mass ◽  
Damage Evolution ◽  
Hard Rock ◽  
Damage Zone ◽  
Jointed Rock ◽  
Jointed Rock Mass ◽  
Surrounding Rock ◽  
Excavation Damaged Zone ◽  
Damaged Zone ◽  
Columnar Jointed Rock Mass

It is very important to accurately determine the depth of excavation damaged zone for underground engineering excavation and surrounding rock stability evaluation, and it can be measured by acoustic test, but there is no quantitative method for analysis of the results, and it relies heavily on the experience of engineers, which leads to the low reliability of the results and also limits the application of the acoustic method. According to substantial field test data and the feedback of surrounding rock support parameters, the boundary method is proposed to determine the depth of excavation damaged zone in surrounding rock based on the relation between the ultrasonic velocity of measured point and the background wave velocity of rock mass. When the method is applied to the columnar jointed rock mass of Baihetan and the deep-buried hard rock of Jinping, the excavation damaged zone was well judged. The results in the Baihetan project show that the proposed method of determining excavation damage zone by the acoustic test can well demonstrate the anisotropy characteristics of the columnar jointed rock mass, and the damage evolution characteristics of jointed rock mass at the same position can also be obtained accurately. Moreover, the method also can accurately reveal the damage evolution process of the deep-buried hard rock under the condition of high ground stress, which proved the applicability of this method in jointed or nonjointed rock masses.

scholarly journals Stability of Rubble Mound Breakwaters—A Study of the Notional Permeability Factor, Based on Physical Model Tests

Water ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 934 ◽  
Author(s):  
Mads Røge Eldrup ◽  
Thomas Lykke Andersen ◽  
Hans Falk Burcharth
Keyword(s):  
Physical Model ◽  
Slope Angle ◽  
Model Tests ◽  
Permeability Factor ◽  
Physical Model Tests ◽  
Stability Model ◽  
The Stability ◽  
Rubble Mound Breakwaters ◽  
Layer Composition

The Van der Meer formulae for quarry rock armor stability are commonly used in breakwater design. The formulae describe the stability as a function of the wave characteristics, number of waves, front slope angle and rock material properties. The latter includes a so-called notional permeability factor characterizing the permeability of the structure. Based on armor stability model tests with three armor layer compositions, Van der Meer determined three values of the notional permeability. Based on numerical model results he added for a typical layer composition one more value. Based on physical model tests, the present paper provides notional permeability factors for seven layer compositions of which two correspond to the compositions tested by Van der Meer. The results of these two layer compositions are within the scatter of the results by Van der Meer. To help determination of the notional permeability for non-tested layer compositions, a simple empirical formula is presented.

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