Passive Earth Pressure of Normally and Overconsolidated Cohesionless Soil in Terms of Critical-State Soil Mechanics Parameters

2017 ◽  
Vol 17 (1) ◽  
pp. 04016028 ◽  
Author(s):  
Adel Hanna ◽  
Riad Diab
Keyword(s):  
Critical State ◽  
Soil Mechanics ◽  
Earth Pressure ◽  
Cohesionless Soil ◽  
Passive Earth Pressure

Pull-out capacity of single batter piles in sand

1986 ◽  
Vol 23 (3) ◽  
pp. 387-392 ◽  
Author(s):  
A. M. Hanna ◽  
A. Afram
Keyword(s):  
Design Method ◽  
Soil Mechanics ◽  
Earth Pressure ◽  
Axial Loading ◽  
Test Results ◽  
Passive Earth Pressure ◽  
Sand Soil ◽  
Pull Out ◽  
Batter Piles ◽  
Good Agreement

The pull-out capacity of single rigid vertical and batter piles in sand and subjected to axial loading has been investigated. Good agreement was found when test results on instrumented model piles were compared with theoretical estimates. The effect of pile inclination on the pull-out capacity has been explained by means of variable mobilized passive earth pressure on the pile's perimeter. A design method and charts are presented. Key words: pile foundation, pull-out capacity, vertical pile, batter pile, sand–soil mechanics.

Research of Semi-Step Walking Wheel Based on Vehicle-Terramechanics

2013 ◽  
Vol 409-410 ◽  
pp. 1435-1440
Author(s):  
Yi Bing Zhao ◽  
Lie Guo ◽  
Lin Hui Li ◽  
Ming Heng Zhang
Keyword(s):  
Ride Comfort ◽  
Soil Mechanics ◽  
Traction Force ◽  
Earth Pressure ◽  
Passive Earth Pressure ◽  
Lunar Rover ◽  
The Earth ◽  
Adams Software ◽  
Two Sides ◽  
Better Than

One new structure of Semi-step Walking Wheel Modeled on Impeller is constructed based on Vehicle-Terramechanics. Based on Passive earth pressure of soil mechanics put forward by C.A.Coulomb, the front force formula of the vane of Semi-step Walking Wheel modeled on Impeller is reduced and the wheel traction force when a set of vanes insert the earth is derived. Some Kinematics Simulations are conducted for installing Lunar rover model with ADAMS software. The simulation results show that the wheel can travel smoothly on straight road, climb over bump obstacles. Also, the ability of the lunar rover one-side surmounting obstacle is better than the ability of two-sides. The walking wheel inherits high ride comfort of traditional wheel and excellent cross obstacle ability of walking wheel.

Active pressure on gravity walls supporting purely frictional soils

2012 ◽  
Vol 49 (1) ◽  
pp. 78-97 ◽  
Author(s):  
D. Loukidis ◽  
R. Salgado
Keyword(s):  
Critical State ◽  
Soil Mechanics ◽  
Retaining Wall ◽  
Pressure Coefficient ◽  
Earth Pressure ◽  
Friction Angle ◽  
Soil Mass ◽  
Active Earth Pressure ◽  
Foundation Soil ◽  
Surface Plasticity

The active earth pressure used in the design of gravity walls is calculated based on the internal friction angle of the retained soil or backfill. However, the friction angle of a soil changes during the deformation process. For drained loading, the mobilized friction angle varies between the peak and critical-state friction angles, depending on the level of shear strain in the retained soil. Consequently, there is not a single value of friction angle for the retained soil mass, and the active earth pressure coefficient changes as the wall moves away from the backfill and plastic shear strains in the backfill increase. In this paper, the finite element method is used to study the evolution of the active earth pressure behind a gravity retaining wall, as well as the shear patterns developing in the backfill and foundation soil. The analyses relied on use of a two-surface plasticity constitutive model for sands, which is based on critical-state soil mechanics.

Seismic Passive Earth Pressure with Seepage for Cohesionless Soil

2012 ◽  
Vol 30 (1) ◽  
pp. 86-101 ◽  
Author(s):  
Jun-Jie Wang ◽  
Hui-Ping Zhang ◽  
Ming-Wei Liu ◽  
Ye-Ying Chen
Keyword(s):  
Earth Pressure ◽  
Cohesionless Soil ◽  
Passive Earth Pressure
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