نتایج جستجو برای: sand pile

تعداد نتایج: 34627  

In the recent years, non-connected piled raft foundation has been considered as an economical and practical deep foundation in the situation that high shear and concentrated loads may occur at the connection of the raft and pile head. This paper was presented an experimental study of a square foundation on the effects of parameters such as S/D, L/D and etc. in two cases of connected or non-conn...

Journal: :Underground Space 2021

Because of the deltaic nature Netherlands, deep soft soil deposits are widespread. Due to population density exploitation underground space is vital for commercial developments and transport networks. Piles used as primary support elements in excavations, cut cover tunnels, quay walls, flood defences provide uplift resistance base tunnels basements. This paper examines empirical correlations li...

1999
N. Vandewalle

Sandpiles have become paradigmatic systems for granular flow studies in statistical physics. New directions of investigations are discussed here. Rather than varying the nature of the pile (sand, salt, rice,..) we have investigated changes in the boundary conditions. We have investigated experimentally and numerically sandpile structures on bases having a fractal perimeter. This type of perimet...

2006
John W. Barrett Leonid Prigozhin

Similar evolutionary variational inequalities appear as convenient formulations for continuous models for sandpile growth, magnetization of type-II superconductors, and evolution of some other dissipative systems characterized by the multiplicity of metastable states, long-range interactions, avalanches, and hysteresis. The origin of this similarity is that these are quasistationary models of e...

Journal: :international journal of civil engineering 0
q. q. zhang geotechnical and structural engineering research center, sh. c. li geotechnical and structural engineering research center, f. y. liang geotechnical and structural engineering research center, m. yang professor, key laboratory of geotechnical and underground engineering (tongji university), ministry of education, shanghai, china q. zhang ph.d. candidate, geotechnical and structural engineering research center, shandong university, jinan, china

a simplified approach for nonlinear analysis of the load-displacement response of a single pile and a pile group is presented using the load-transfer approach. a hyperbolic model is used to capture the relationship between unit skin friction and pile-soil relative displacement developed at the pile-soil interface and the load-displacement relationship developed at the pile end. as to the nonlin...

Journal: :Theor. Comput. Sci. 2001
Matthieu Latapy Roberto Mantaci Michel Morvan Thi Ha Duong Phan

spm (Sand Pile Model) is a simple discrete dynamical system used in physics to represent granular objects. It is deeply related to integer partitions, and many other combinatorics problems, such as tilings or rewriting systems. The evolution of the system started with n stacked grains generates a lattice, denoted by SPM(n). We study here the structure of this lattice. We rst explain how it can ...

2009
Aytac Guven

Genetic programming (GP) has nowadays attracted the attention of researchers in the prediction of hydraulic data. This study presents linear genetic programming (LGP), which is an extension to GP, as an alternative tool in the prediction of scour depth around a circular pile due to waves in medium dense silt and sand bed. Field measurements were used to develop LGP models. The proposed LGP mode...

2001
Clémence Magnien Ha Duong Phan Laurent Vuillon

The Chip Firing Game (CFG) is a discrete dynamical model used in physics, computer science and economics. It is known that the set of configurations reachable from an initial configuration (this set is called the configuration space) can be ordered as a lattice. We first present a structural result about this model, which allows us to introduce some useful tools for describing those lattices. T...

Journal: :Journal of Marine Science and Engineering 2021

The large-diameter monopiles are the most preferred foundation used in offshore wind farms. However, influence of pile diameter and aspect ratio on lateral bearing behavior sand with different relative densities has not been systematically studied. This study presents a series well-calibrated finite-element (FE) analyses using an advanced state dependent constitutive model. FE model was first v...

Journal: :Science 2006
J Zhou S Long Q Wang A D Dinsmore

We present systematic and detailed measurements of interparticle contact forces inside three-dimensional piles of frictionless liquid droplets. We measured long-range chainlike correlations of the directions and magnitudes of large forces, thereby establishing the presence of force chains in three dimensions. Our correlation definition provides a chain persistence length of 10 mean droplet diam...

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