Numerical Simulation for Soil Surface Explosion Problem - A study of fragments controlling effect using liner plate application –

A rigorous scheme must be formulated in advance before a viaduct is to be exploded, in this case, numerical simulation can provide effective guarantee to the formulation of the scheme. Focusing on the explosion engineering of a large-scale city viaduct, the process of its explosion and collapse were simulated by the LS-DYNA software. The vibration responses of soil surface caused by the explosion and collapse were analyzed, and also the numerical results were compared with the measurement data. The numerical results agreed well with the measurement data, which showed that the simulation method proposed in the paper could simulate the explosion process well and the results could be also an guidline for the similar projections in future.

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Capillary rise quantification by field injection of artificial deuterium and laboratory soil characterization

Hydrology and Earth System Sciences Discussions ◽

10.5194/hessd-7-7757-2010 ◽

2010 ◽

Vol 7 (5) ◽

pp. 7757-7778 ◽

Cited By ~ 1

Author(s):

O. Grünberger ◽

J. L. Michelot ◽

L. Bouchaou ◽

P. Macaigne ◽

Y. Hsissou ◽

...

Keyword(s):

Numerical Simulation ◽

Capillary Rise ◽

Soil Surface ◽

Shallow Aquifer ◽

Salt Balance ◽

Peak Displacement ◽

Retention Curve ◽

Soil Hydraulic Conductivity ◽

Quantification Method ◽

Simulation Based

Abstract. In arid contexts, water rises from the saturated level of a shallow aquifer to the drying soil surface where evaporation takes place. This process plays important roles in terms of plant survival, salt balance and aquifer budget. A new field quantification method of this capillary rise flow is proposed using micro-injections (6 μL) of deuterium-enriched solution (δ value of 63 000‰ vs. V-SMOW) into unsatured soil at 1 m depth. Evaluation of peak displacement from a profile sampling 35 days later, delivered estimates that were compared with outputs of numerical simulation based on laboratory hydrodynamic measurements. A rate of 3.7 cm y−1 was observed in a Moroccan site where the aquifer level was 2.44 m deep. This value was higher, than other estimates based on natural diffusion with the same depth of aquifer, but lower than the estimates established using integration of van Genutchen closed-form functions for soil hydraulic conductivity and retention curve.

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Numerical Simulation of Blast Wave Propagating on the Soil Surface

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.602-605.3256 ◽

2014 ◽

Vol 602-605 ◽

pp. 3256-3260

Author(s):

Xiao Yong Li ◽

Cun Yan Cui ◽

Jing Peng Chen ◽

Yun Chun Jiang ◽

Bei Lei Zhao ◽

...

Keyword(s):

Numerical Simulation ◽

Shock Wave ◽

High Pressure ◽

Comparative Analysis ◽

Blast Wave ◽

Soil Surface ◽

Low Pressure ◽

Pressure Region ◽

High Pressure Region

A numerical simulation of TNT explosion on the soil surface is presented in this paper. It demonstrates how the blast wave propagates on the soil surface and interacts with the soil surface. Compared with the explosion in air, a comparative analysis on the distribution of the shock wave overpressure is implemented. The results show that the space on the soil surface close to the explosion source can be divided into a relatively high pressure region and a relatively low pressure region. Moreover, by defining the scaled height H, the interface of two regions comes about H = 0.35.

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