Numerical Simulation Of Ground Displacement Behaviors Due To Unsteady Seepage Flow

2013 ◽  
Author(s):  
Lingyu raveen ◽  
Haruyuki Yamamoto
Keyword(s):  
Numerical Simulation ◽  
Seepage Flow ◽  
Ground Displacement

GROUND DISPLACEMENT BEHAVIORS CONSIDERING UNSTEADY SEEPAGE FLOW AND NON-LINEAR DEFORMATION

2014 ◽  
Vol 1 (1) ◽  
Author(s):  
Haruyuki Yamamoto ◽  
Lingyu Meng
Keyword(s):  
Numerical Simulation ◽  
Velocity Distribution ◽  
Flow Velocity ◽  
Seepage Flow ◽  
Time Dimension ◽  
Ground Displacement ◽  
Simulation Code ◽  
Linear Deformation ◽  
Space Problem ◽  
Non Linear

One major concern for excavation projects is the ground displacement generated around the excavated zone. In this paper, a 2-dimensional model analysis was made on non-linear ground behavior around excavation due to unsteady seepage of groundwater, taking into account the saturated-unsaturated theory by using Toyo-ura sand. The finite-element method and finite-different method were employed to study the space problem and time dimension, respectively. The numerical simulation code implemented by FORTRAN was applied to predict the flow-velocity distribution and the results of ground displacement. To validate the programming, a simple model was tested for comparison with tri-axial test data. The samples were made of Toyo-ura sand with a relative density of 90%. The programming also calculated flow-velocity distribution and ground displacement results of dewatering in excavation work over time. Results showed that the effect of horizontal displacement caused by seepage flow plays a very important role in the displacement field. This numerical simulation method provides a more reasonable computing scheme compared to traditional methods. All have theoretical meaning and applicable value, and also present useful references for the excavation stability and disaster prediction.

Study on the Capacity Increasing and Dam Heighten of Plain Reservoirs

2013 ◽  
Vol 353-356 ◽  
pp. 2531-2536
Author(s):  
Xiu Guang Song ◽  
Zhi Dong Zhou ◽  
Hong Bo Zhang ◽  
Hong Ya Yue
Keyword(s):  
Numerical Simulation ◽  
Comparative Analysis ◽  
Site Investigation ◽  
Seepage Flow ◽  
Differential Settlement ◽  
Construction Technology ◽  
Dam Stability ◽  
The Stability ◽  
Design Construction

In order to solve the problem of differential settlement, seepage flow and stability between the new and old dam boundary in capacity increasing of the plain reservoirs, the comparative analysis on the stability of the dam slope with different methods on dealing with the new and old dam boundary was performed by numerical simulation with FLAC3D. The result shows that combining the new and old dam by using geogrid indicates superiority for reducing differential settlement, improving the dam stability and safety, etc. In the meantime, on the basis of actual site investigation and theoretical analysis, combined with the requirements of design, construction and management in capacity increasing of the plain reservoirs, the key construction technology was put forward and widely applied foreground, which can improve the quality of the construction, reduce engineering disease and provide references for capacity increasing engineering of in plain reservoirs.

Ground Behaviors due to Seepage Force of Groundwater

2012 ◽  
Vol 594-597 ◽  
pp. 516-521
Author(s):  
Ling Yu Meng ◽  
Haruyuki Yamamoto
Keyword(s):  
Vertical Displacement ◽  
Seepage Flow ◽  
Unconfined Aquifer ◽  
The Finite Element Method ◽  
Seepage Force ◽  
Ground Displacement ◽  
Simulation Code ◽  
Capillary Zone ◽  
Seepage Theory ◽  
Unsaturated Seepage

Well pumping leads to both horizontal and vertical displacement, and fluctuation of groundwater level can cause serious damage to structures in a lagre affected area. Ground behaviors due to seepage force in traditional methods were rarely considered. This paper presents a numerical solution of ground displacement behaviors due to unsteady groundwater flow in unconfined aquifer by considering the effect of capillary zone based on the saturated-unsaturated seepage theory, and the numerical simulation code implemented by FORTRAN is applied to predict the flow velocity distribution and the results of ground displacement. The model uses the finite element method and finite difference method to study the problem. The analysis shows that the seepage force and the effect of capillary zone play a very important role in both seepage flow and displacement field.

scholarly journals NUMERICAL SIMULATION ON DEVELOPMENT OF TIDAL CREEK WITH SEEPAGE FLOW

2012 ◽  
Vol 68 (4) ◽  
pp. I_979-I_984
Author(s):  
Toshiki IWASAKI ◽  
Yasuyuki SHIMIZU ◽  
Ichiro KIMURA
Keyword(s):  
Numerical Simulation ◽  
Tidal Creek ◽  
Seepage Flow

Numerical Analysis on Ground Displacement at Mined-Out Area of Yuecheng Reservoir Project

2012 ◽  
Vol 594-597 ◽  
pp. 194-197
Author(s):  
Shi Wei Duan ◽  
Xian E Xu
Keyword(s):  
Numerical Simulation ◽  
Numerical Analysis ◽  
Simulation Analysis ◽  
Ground Deformation ◽  
Mining Activity ◽  
Ground Subsidence ◽  
Ground Displacement ◽  
Deformation Response ◽  
Reservoir Project ◽  
Roof Strata

Coal mining activity has potential hazards to the safety of the Yuecheng Reservoir Project due to ground subsidence and water seepage. Mohr-Coulomb constitutive model was built and FLAC/FLAC3D program was used for numerical simulation analysis of the ground deformation response with mining of coal, then, displacement characteristics of the roof strata and distribution of overlying stress field were brought out, and the scope of water transmitting fracture zone was calculated.

scholarly journals Numerical Simulation of Sand Migration and Seepage Flow During Seepage Failure by CWENO Scheme

2014 ◽  
Vol 9 (4) ◽  
pp. 521-532
Author(s):  
Kazunori FUJISAWA ◽  
Kosuke TSUJIMURA ◽  
Akira MURAKAMI
Keyword(s):  
Numerical Simulation ◽  
Seepage Flow ◽  
Seepage Failure
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