A particle mechanics approach for the dynamic strength model of the jointed rock mass considering the joint orientation

2019 ◽  
Vol 43 (18) ◽  
pp. 2797-2815 ◽  
Author(s):  
Changtai Zhou ◽  
Chaoshui Xu ◽  
Murat Karakus ◽  
Jiayi Shen
Keyword(s):  
Rock Mass ◽  
Dynamic Strength ◽  
Jointed Rock ◽  
Jointed Rock Mass ◽  
Strength Model ◽  
Joint Orientation ◽  
Particle Mechanics

Analysis of TBM Tunnel Behavior in Jointed Rock Mass

2011 ◽  
Vol 90-93 ◽  
pp. 2033-2036 ◽  
Author(s):  
Jin Shan Sun ◽  
Hong Jun Guo ◽  
Wen Bo Lu ◽  
Qing Hui Jiang
Keyword(s):  
Rock Mass ◽  
Numerical Models ◽  
Jointed Rock ◽  
In Situ Stress ◽  
Jointed Rock Mass ◽  
Joint Orientation ◽  
Joint Spacing ◽  
Factors Affecting ◽  
Dip Angle

The factors affecting the TBM tunnel behavior in jointed rock mass is investigated. In the numerical models the concrete segment lining of TBM tunnel is concerned, which is simulated as a tube neglecting the segment joint. And the TBM tunnel construction process is simulate considering the excavation and installing of the segment linings. Some cases are analyzed with different joint orientation, joint spacing, joint strength and tunnel depth. The results show that the shape and areas of loosing zones of the tunnel are influenced by the parameters of joint sets and in-situ stress significantly, such as dip angle, spacing, strength, and the in-situ stress statement. And the stress and deformation of the tunnel lining are influenced by the parameters of joint sets and in-situ stress, too.

Test Study on Dynamic Mechanical Property of Jointed Rock Mass

2013 ◽  
Vol 868 ◽  
pp. 282-286 ◽  
Author(s):  
Li Min Zhang ◽  
Shu Ran Lv ◽  
Hong Yan Liu
Keyword(s):  
Rock Mass ◽  
Failure Mode ◽  
Failure Modes ◽  
Dynamic Strength ◽  
Strain Ratio ◽  
Jointed Rock ◽  
Jointed Rock Mass ◽  
Tensile Failure ◽  
Dip Angle ◽  
Joint Center

Failure modes of jointed rock mass with different joint dip angle, joint center continuity degree, joint sets, load strain ratio and joint filling width under SHPB test are studied with model tests. The results show that failure modes and dynamic strength of jointed rock mass are much related to joint geometry. To rock mass with a single joint, its strength and failure mode are greatly controlled by the joint dip angle. The dynamic strength of the samples with joint dip angle 0° and 90°, whose failure modes are both tensile failure, is 90% and 71% of that of intact one, respectively. The dynamic strength of the samples with joint dip angle 60° is nearly zero. The dynamic strength of the samples with joint dip angle 30° and 45°, whose failure modes are mainly shear failure with partly tensile failure, is 50% and 18% of that of intact ones, respectively. The dynamic strength of the samples with 1/4, 1/2 and 4/5 joint center continuity degree is 95%, 74% and 28% of that of intact one, respectively. The dynamic strength of the samples with 1, 2 and 3 sets of joints is 54%, 23% and 10% of that of intact one, respectively. The dynamic strength of the intact and jointed samples both increases with load strain ratio, and the sensitivity to load strain ratio of the former is much higher than that of the latter, whose failure mode becomes more complicated accordingly. With increase of joint fillings width, the samples dynamic strength decreases gradually, but its failure mode does not change.

Influence of Joint Orientation on the Behavior of Dam Resting on Jointed Rock Mass Under Static Condition

2018 ◽  
Vol 48 (4) ◽  
pp. 650-662
Author(s):  
Saurabh Kumar ◽  
Prasun Halder ◽  
Bappaditya Manna ◽  
K. G. Sharma
Keyword(s):  
Rock Mass ◽  
Static Condition ◽  
Jointed Rock ◽  
Jointed Rock Mass ◽  
Joint Orientation

A new damage model accounting the effect of joint orientation for the jointed rock mass

2020 ◽  
Vol 13 (7) ◽  
Author(s):  
Changtai Zhou ◽  
Murat Karakus ◽  
Chaoshui Xu ◽  
Jiayi Shen
Keyword(s):  
Rock Mass ◽  
Damage Model ◽  
Jointed Rock ◽  
Jointed Rock Mass ◽  
Joint Orientation
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