The effect of the earth pressure coefficients on the runout of granular material

2007 ◽  
Vol 22 (10) ◽  
pp. 1437-1454 ◽  
Author(s):  
Marina Pirulli ◽  
Marie-Odile Bristeau ◽  
Anne Mangeney ◽  
Claudio Scavia
Keyword(s):  
Granular Material ◽  
Earth Pressure ◽  
Pressure Coefficients ◽  
The Earth

scholarly journals Probabilistic analysis of the active earth pressure on earth retaining walls for c-ϕ soils according to the Mazindrani and Ganjali method

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Julian Osorio ◽  
Juan Camilo Viviescas ◽  
Juan Pablo Osorio
Keyword(s):  
Probabilistic Analysis ◽  
Earth Pressure ◽  
Friction Angle ◽  
Retaining Walls ◽  
Soil Variability ◽  
Active Earth Pressure ◽  
Pressure Coefficients ◽  
Reliability Based Design ◽  
The Earth ◽  
Significant Probability

AbstractThe determination of the earth pressure coefficients (K) in geotechnical engineering is one of the most critical procedures in designing earth retaining walls. However, most earth pressure theories are made for either clay or sands, where the c-ϕ soils are the least analysed. In this paper, an analysis of the earth pressure for drained mixed soils based in Mazindrani and Ganjali (J Geotech Geoenviron Eng 123:110–112, 1997) theory was carried out. Earth pressure coefficients are generally used in a deterministic way and can represent designs under an inadmissible risk. Therefore, Reliability-based design arises as an essential tool to deal with soil variability as one of the main aspects of the geotechnical uncertainties. The influence of the soil variability in the active earth pressure for a c-ϕ soil was performed through probabilistic analysis concerning the Ka coefficient of variation (Cv) of both shear strength parameters. The sensitivity analysis shows a Cv in which the cohesion begins to have a more significant correlation with Ka than the friction angle. The results show an increase of the statistical Ka concerning the deterministic value as the soil variability and the soil slope (β) increase. Although the statistical value does not increase significantly, a statistical analysis on gravity walls and sheet pile walls in c-ϕ soils shows a significant probability of failure (pf) increase. The pf obtained through the c-ϕ variability can be considered inadmissible even if the required FS are met.

Experiences with shored excavations

1987 ◽  
Vol 24 (2) ◽  
pp. 267-278
Author(s):  
W. A. Trow
Keyword(s):  
Soil Mechanics ◽  
Pressure Coefficient ◽  
Earth Pressure ◽  
Foundation Engineering ◽  
Active Earth Pressure ◽  
Case Histories ◽  
Pressure Coefficients ◽  
The Earth ◽  
Earth Pressure Coefficient ◽  
Selection Of

This paper considers shoring of excavations associated with construction of buildings with particular reference to the selection of the earth pressure coefficient. The empirical criteria, given by R. B. Peck and other participants at the International Conference on Soil Mechanics and Foundation Engineering in Mexico City in 1969, are examined. Several case histories of deep excavations are given where acceptable deformations were experienced using active earth pressure coefficients in shoring design. Where failure occurred, it was attributed to causes unrelated to the selection of earth pressure coefficient. Key words: shoring, earth pressure coefficient, deformations.

Coordinated optimization control of shield machine based on dynamic fuzzy neural network direct inverse control

2020 ◽  
pp. 014233122098027
Author(s):  
Xuanyu Liu ◽  
Wentao Wang ◽  
Yudong Wang ◽  
Cheng Shao ◽  
Qiumei Cong
Keyword(s):  
Fuzzy Neural Network ◽  
Control Method ◽  
Earth Pressure ◽  
Screw Conveyor ◽  
Inverse Control ◽  
The Earth ◽  
Coordinated Optimization ◽  
Optimization Control ◽  
Fuzzy Neural ◽  
Shield Machine

During shield machine tunneling, the earth pressure in the sealed cabin must be kept balanced to ensure construction safety. As there is a strong nonlinear coupling relationship among the tunneling parameters, it is difficult to control the balance between the amount of soil entered and the amount discharged in the sealed cabin. So, the control effect of excavation face stability is poor. For this purpose, a coordinated optimization control method of shield machine based on dynamic fuzzy neural network (D-FNN) direct inverse control is proposed. The cutter head torque, advance speed, thrust, screw conveyor speed and earth pressure difference in the sealed cabin are selected as inputs, and the D-FNN control model of the control parameters is established, whose output are screw conveyor speed and advance speed at the next moment. The error reduction rate method is introduced to trim and identify the network structure to optimize the control model. On this basis, an optimal control system for earth pressure balance (EPB) of shield machine is established based on the direct inverse control method. The simulation results show that the method can optimize the control parameters coordinately according to the changes of the construction environment, effectively reduce the earth pressure fluctuations during shield tunneling, and can better control the stability of the excavation surface.

The earth pressure behind full-height integral abutments

2005 ◽  
Vol 90 (6) ◽  
pp. 55-58 ◽  
Author(s):  
Ming Xu ◽  
Alan G. Bloodworth
Keyword(s):  
Earth Pressure ◽  
The Earth ◽  
Integral Abutments ◽  
Full Height

Experimental Study on Earth Pressure of Corrugated Steel Culvert under High Fill Embankment

2013 ◽  
Vol 405-408 ◽  
pp. 1815-1819
Author(s):  
Wen Sheng Yu ◽  
Zhu Long Li ◽  
Xiao Ru Xie ◽  
Li Yuan Guo
Keyword(s):  
Mechanical Property ◽  
Experimental Study ◽  
Reinforced Concrete ◽  
Concrete Slab ◽  
Earth Pressure ◽  
Reinforced Concrete Slab ◽  
The Earth ◽  
Filling Height ◽  
Test Points ◽  
Better Than

To analyze the earth pressure of corrugated steel culvert under high fill embankment, a field test was taken and the change law was got with the filling height increasing, the force state when geotechnical grilles were laid on the top of corrugated steel culvert was compared to that of reinforced concrete slab culvert. Results show that the pressure on the top of corrugated steel culvert is smaller than that on the external in same level when test points are near to culvert, the values of test points above and below geotechnical grilles are close, and the pressure of corrugated steel culvert is smaller than that of reinforced concrete slab culvert when filling height is above 7.3 m. So analysis indicates corrugated steel culvert spreads the upper load better, the geotechnical grille can reduce the pressure effectively through earth pressure redistribution, and the mechanical property of corrugated steel culvert is better than reinforced concrete slab culvert under high fill embankment.

Predicting the Earth Pressure on Integral Bridge Abutments

2012 ◽  
Vol 17 (2) ◽  
pp. 371-381 ◽  
Author(s):  
Alan G. Bloodworth ◽  
Ming Xu ◽  
James R. Banks ◽  
Chris R. I. Clayton
Keyword(s):  
Earth Pressure ◽  
Bridge Abutments ◽  
Integral Bridge ◽  
The Earth
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