Sentence examples for ballast thickness from inspiring English sources

However, the reduction in stiffness induced by modifying the configuration under the ballast (by, for example, adding elastic mats) causes an increase in settlement, the latter exerting the strongest influence (even more so than the change in ballast thickness) on track performance.

Ballast thickness; Sub-ballast thickness; Super-compacted layer thickness; Embankment resilient modulus; Ballast resilient modulus; Sub-ballast complex modulus.

The parameters on which we have illustrated the sensitivity's study are the following: Ballast thickness; Sub-ballast thickness; Super-compacted layer thickness; Embankment resilient modulus; Ballast resilient modulus; Sub-ballast complex modulus.

Figure 7 has pointed out the trend of transfer function modulus H f) by varying frequency and ballast thickness.

The data show that a narrow ballast thickness (H = 0.35 m) gives a less rigid response, with the exception of the last peak.

Ballast thickness: from 0.35 to 0.50 m; Sub-ballast thickness: from 0.08 to 0.20 m; Super-compacted layer thickness: from 0.25 to 0.45 m; Embankment resilient modulus: from 6.0E+07 to 1.2E+08 N/m2; Ballast resilient modulus: from 3.5E+07 to 5.0E+07 N/m2; Sub-ballast complex modulus2 [14]: from 1.00E+09 to 5.0E+09 N/m2.

In the combination No. 13 we obtain a nearly equal result increasing the sub-ballast thickness up to 0.20 m.

Figure 8 shows the analysis responses in the case of the variation of the sub-ballast thickness, in terms of transfer function modulus.

As expected, the shakedown limits decreased as the ballast stiffness and thickness increased, especially for relatively small frictional coefficient; while increased with raising rail's yield stress.

This paper therefore focuses on a laboratory study of the mechanical performance of a number of different track sections, assessing the effect of using various types of elastic elements with varying properties, various types of sub-ballast, and different thicknesses of ballast layer.

Sub-ballast in asphalt concrete: Thickness 12.0 cm; Absolute value of the complex modulus |E*| ≥ 2,000.0E+06 N/m2,000.0E+06