Assessing the Open Trenches in Screening Railway Ground-Borne Vibrations by Means of Artificial Neural Network

Table 3

Mechanical characteristics of the soil medium.

Type of soil	𝐺 (MN/m^2)	ρ (N/m^4 sec^2)	ν	ξ	𝑉𝑠 (m/sec)	𝑉𝑟 (m/sec)
Clay	20.7	1583.8	0.3	0.06	114.3	108.1
Sand	138	1682.8	0.3	0.04	286.3	270.9