Page 242 - 360.revista de Alta Velocidad - Nº 5

López-Bachiller Fernández, Miguel. Sampedro Rodríguez, Ángel. Díaz Minguela, Jesús.

The demands of each layer are those listed below:

Ballast subballast Track Bed Soil Platform

CBR >22 >10 >5 10<CBR<20

E2 Modulus
2
>1.700 kp/cm >1.200 kp/cm >800 kp/cm
2
2
Plate‐bearing
Permeability < 10‐6
LA desgaste < 24 <30

Wet Micro‐Deval < 16 ≤25

Density (% MP) > 98% PM >95% PM >1,75 kg/m3

Max. size ≤10 mm

Fines content ≤5%

LL<50 If
Atterberg limits 0,35<LL<50,
then Ip>0,73(LL‐20)

QS3, or QS2+40 cm
Type of soil
QS3 or QS1+60 cm QS3

240 360.revista de alta velocidad