ZagypanM,FairfieldC A.Continuous surface wave and impact methods of measuring the stiffness and density of railway ballast. NDT and E International . 2002ZagypanM;FairfieldC;A.Continuous surface wave and impact methods of measuring the stiffness and density of railway ballast.NDT and E ...
The existing quality standards concerning density and bearing capacity of a railway track subballast layers have been discovered to be incongruence in some parts. The standard level of bearing capacity has not been reached in some of the recent railway construction and renovation projects. The aim ...
Analyses of Ballast Deformation by Non-tension Stress Model; 用无拉应力计算模型分析道床变形 2. Vibration of railwayballastis a key factor of causing track geometry change an d the increase of track maintenance costs. 铁路道床的振动是引起轨道几何变形和养护维修费用增长的关键因素 ,国内外有关连续散粒...
In addition, the potential benefits of the proposed reinforcement technique in railway ballast are illustrated and discussed.O. AjayiL. Le PenA. ZervosW. PowrieGeomechanics and geotechnics: from micro to macro, vol. 2: International symposium on geomechanics from micro to macro (IS-Cambridge 2014...
A texture, generally comprising indentations perpendicular to the longitudinal axis on the molded object, provides a fnclional surface between the railway crosstie and the ballast beneath the corsstieHENRY W. SULLIVANWILLIAM J. KRYGSMANGREGORY P. KROUSE...
The track is supported on a load distributing layer resting on top of a low density foundation layer. - A railway track construction optionally including a ballast bed (3) is supported by a foundation set into the ground (6), comprising a lightweight foundation layer (5) of a material ...
When planning and designing railway constructions adjacent to existing buildings or constructing buildings near existing tracks, it is crucial to estimate the vibration levels and the probability of exceeding thresholds based on the distance and the evaluated frequency. These two factors are integral to ...
The article provides practical recommendations on the use of force density spectra in vibration prediction along railway lines. Abstract The planning application and approval process of railway tracks is generally accompanied by a vibration immission assessment. Starting with the source spectrum, which is...