scholarly journals Effect of Pore Fluid Pressure on the Normal Deformation of a Matched Granite Joint

Processes ◽  
2018 ◽  
Vol 6 (8) ◽  
pp. 107 ◽  
Author(s):  
Qiang Zhang ◽  
Xiaochun Li ◽  
Bing Bai ◽  
Shaobin Hu ◽  
Lu Shi
Keyword(s):  
Linear Relationship ◽  
Host Rock ◽  
Laboratory Experiments ◽  
Fluid Pressure ◽  
Exponential Model ◽  
Pore Fluid ◽  
Fluid Injection ◽  
Pore Fluid Pressure ◽  
Normal Deformation ◽  
Deformation Behaviors

The influence of pore fluid pressure on the normal deformation behaviors of joints is vital for understanding the interaction between hydraulic and mechanical processes of joints. The effect of pore fluid pressure on the normal deformation of a granite matched joint was investigated by laboratory experiments. Experimental results indicate pore fluid pressure significantly affects the normal deformation of jointed sample, and the relative normal deformation of jointed sample during fluid injection consists of the opening of the joint and the dilation of host rock. The action of pore fluid pressure on the joint follows the Terzaghi’s effective stress law. The normal deformation of the joint can be well quantitated by the generalized exponential model. The relative normal deformation of host rock during fluid injection would have a linear relationship with pore fluid pressure, and if affected by gas is more pronounced than water.

scholarly journals Correction to: Stress and pore fluid pressure control of seismicity rate changes following the 2016 Kumamoto earthquake, Japan

2021 ◽  
Vol 73 (1) ◽  
Author(s):  
Kodai Nakagomi ◽  
Toshiko Terakawa ◽  
Satoshi Matsumoto ◽  
Shinichiro Horikawa
Keyword(s):  
Fluid Pressure ◽  
Pressure Control ◽  
Pore Fluid ◽  
2016 Kumamoto Earthquake ◽  
Pore Fluid Pressure ◽  
Seismicity Rate ◽  
Kumamoto Earthquake ◽  
The 2016 Kumamoto Earthquake ◽  
Seismicity Rate Changes

An amendment to this paper has been published and can be accessed via the original article.

scholarly journals Fracture-induced pore fluid pressure weakening and dehydration of serpentinite

2019 ◽  
Vol 767 ◽  
pp. 228168 ◽  
Author(s):  
Melodie E French ◽  
Greg Hirth ◽  
Keishi Okazaki
Keyword(s):  
Fluid Pressure ◽  
Pore Fluid ◽  
Pore Fluid Pressure

scholarly journals Control of pore fluid pressure diffusion on fault failure mode: Insights from the 2009 L'Aquila seismic sequence

2012 ◽  
Vol 117 (B5) ◽  
pp. n/a-n/a ◽  
Author(s):  
Luca Malagnini ◽  
Francesco Pio Lucente ◽  
Pasquale De Gori ◽  
Aybige Akinci ◽  
Irene Munafo'
Keyword(s):  
Failure Mode ◽  
Fluid Pressure ◽  
Pore Fluid ◽  
Seismic Sequence ◽  
Pore Fluid Pressure ◽  
Pressure Diffusion

Connections between subducted sediment, pore-fluid pressure, and earthquake behavior along the Alaska megathrust

Geology ◽  
2018 ◽  
Vol 46 (4) ◽  
pp. 299-302 ◽  
Author(s):  
Jiyao Li ◽  
Donna J. Shillington ◽  
Demian M. Saffer ◽  
Anne Bécel ◽  
Mladen R. Nedimović ◽  
...  
Keyword(s):  
Fluid Pressure ◽  
Pore Fluid ◽  
Pore Fluid Pressure ◽  
Subducted Sediment

scholarly journals Effect of Density and Total Weight on Flow Depth, Velocity, and Stresses in Loess Debris Flows

Water ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1784 ◽  
Author(s):  
Heping Shu ◽  
Jinzhu Ma ◽  
Haichao Yu ◽  
Marcel Hürlimann ◽  
Peng Zhang ◽  
...  
Keyword(s):  
Normal Stress ◽  
Debris Flows ◽  
High Speed ◽  
Goodness Of Fit ◽  
Flow Behavior ◽  
Fluid Pressure ◽  
Pore Fluid ◽  
Flow Depth ◽  
Pore Fluid Pressure ◽  
Mixture Density

Debris flows that involve loess material produce important damage around the world. However, the kinematics of such processes are poorly understood. To better understand these kinematics, we used a flume to measure the kinematics of debris flows with different mixture densities and weights. We used sensors to measure pore fluid pressure and total normal stress. We measured flow patterns, velocities, and depths using a high-speed camera and laser range finder to identify the temporal evolution of the flow behavior and the corresponding peaks. We constructed fitting functions for the relationships between the maximum values of the experimental parameters. The hydrographs of the debris flows could be divided into four phases: increase to a first minor peak, a subsequent smooth increase to a second peak, fluctuation until a third major peak, and a final continuous decrease. The flow depth, velocity, total normal stress, and pore fluid pressure were strongly related to the mixture density and total mixture weight. We defined the corresponding relationships between the flow parameters and mixture kinematics. Linear and exponential relationships described the maximum flow depth and the mixture weight and density, respectively. The flow velocity was linearly related to the weight and density. The pore fluid pressure and total normal stress were linearly related to the weight, but logarithmically related to the density. The regression goodness of fit for all functions was >0.93. Therefore, these functions are accurate and could be used to predict the consequences of loess debris flows. Our results provide an improved understanding of the effects of mixture density and weight on the kinematics of debris flows in loess areas, and can help landscape managers prevent and design improved engineering solutions.

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