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

Table 5

Design parameters for trench—site close to the trench.

𝑑/ℎ	Clayey soil layer [𝜆𝑟=4,00m]			Sandy soil layer [𝜆𝑟=10,00m]
	𝑑	𝑙	𝑤	𝑑	𝑙	𝑤
1/5	—	—	—	0.2𝜆𝑟	2𝜆𝑟	≤0.1𝜆𝑟
1/2	1.25𝜆𝑟	>3𝜆𝑟	all	0.5𝜆𝑟	≥1.2𝜆𝑟	all
2/3	<2.75𝜆𝑟	6𝜆𝑟	all	0.2𝜆𝑟	all	all