A Rational Method for Design of Railroad Track Foundation

Shahu, J. T.; Yudhbir, _; Kameswararao, N.S.V.

doi:10.3208/sandf.40.6_1

Cited by 36 publications

(19 citation statements)

References 11 publications

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“…The value of parameters has been selected by taking realistic values of the physical parameters for the beam, reinforcing and soil layers, applied load and velocity [3,13,14,20]. Thus the obtained ranges of nondimensional parameters are as follows:…”

Section: Resultsmentioning

confidence: 99%

Response of beams on a tensionless extensible geosynthetic-reinforced earth bed subjected to moving loads

Maheshwari

Chandra

Basudhar

2004

Computers and Geotechnics

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Section: Resultsmentioning

confidence: 99%

Response of beams on a tensionless extensible geosynthetic-reinforced earth bed subjected to moving loads

Maheshwari

Chandra

Basudhar

2004

Computers and Geotechnics

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“…The above range of parameters has been selected by taking realistic values of the physical parameters for the beam, reinforcing and soil layers, applied load and velocity (Das, 1999;Selvadurai, 1979;Shahu et al, 2000).…”

Section: Resultsmentioning

confidence: 99%

Steady State Response of Beams on a Tensionless Geosynthetic-Reinforced Granular Fill-Soft Soil System Subjected to Moving Loads

Maheshwari

Chandra

Basudhar

2005

SOILS AND FOUNDATIONS

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In this paper, geosynthetic reinforced granular fill-soft soil system subjected to a moving load with constant velocity over an infinitely long beam is analyzed. The foundation is assumed as tensionless foundation (to react only in compression). The upper reinforced granular bed is modeled by a rough elastic membrane embedded in Pasternak shear layer overlying a series of compressible Winkler springs representing the underlying soft soil. The parametric studies reveal that the flexural response of the infinite beam as well as of the reinforcement, are greatly affected by the velocity, intensity of load and compressibility of granular fill. The interfacial frictional coefficients, shear modulus of granular layers and coefficient of lateral earth pressure do not significantly affect the response of the beam and the reinforcement for the range of parameters studied.

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“…The properties of the geosynthetic layer have been adopted to be the same as those for Raymond [7]. The range of values of coefficient of subgrade reaction for the upper soil layer has been decided by considering the upper layer to be dense sand (in the case of foundation beam) or ballast layer (in the case of rail tie) [11,12]. Wide range of values of non-dimensional parameters has been worked out by considering these practical ranges of parameters and is given as follows:…”

Section: Resultsmentioning

confidence: 99%

“…Relative flexural rigidity of the beams (R) [7,11] i.e. the upper beam is in perfect contact with the ground surface, for the parameters, rigidity ratio R = 15 000, stiffness ratio r = 5, length ratio X r = 2.5 and normalized weight of the upper beam w = 0.0025.…”

Section: Resultsmentioning

confidence: 99%

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Analysis of beams on tensionless reinforced granular fill‐soil system

Maheshwari

2007

Num Anal Meth Geomechanics

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SUMMARYIn this paper, a beam subjected to end concentrated loads has been modeled and analyzed to estimate its flexural response. The beam has been assumed to rest on reinforced earth beds with reinforcing elements having some finite bending stiffness. The reinforcing elements have been idealized as beams with smooth surface characteristics. The foundation system has been assumed to react only in compression (tensionless foundation), i.e. the separation between the upper beam and the ground surface has been taken into consideration. Winkler springs of different stiffnesses have been used to idealize the upper dense and lower poor soils. As the analysis considers the separation between the upper beam and the soil, the weight of the upper beam has been taken into account. The governing differential equations have been derived and presented in a non-dimensional form. These equations have been solved using finite difference method with the help of appropriate boundary and continuity conditions. The response of the foundation system has been compared with the case when the beam is in perfect contact with the ground surface. The parametric study shows that the response of the model is greatly affected by the length ratio of beams, ratio of stiffness of upper and lower soil layers, ratio of flexural rigidity of upper and lower beams and weight of the upper foundation beam.

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A Rational Method for Design of Railroad Track Foundation

Cited by 36 publications

References 11 publications

Response of beams on a tensionless extensible geosynthetic-reinforced earth bed subjected to moving loads

Response of beams on a tensionless extensible geosynthetic-reinforced earth bed subjected to moving loads

Steady State Response of Beams on a Tensionless Geosynthetic-Reinforced Granular Fill-Soft Soil System Subjected to Moving Loads

Analysis of beams on tensionless reinforced granular fill‐soil system

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