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

Table 6

Design parameters for trench—vibration-sensitive site.

𝑑/ℎ	Clayey soil layer [𝜆𝑟=4,00m]			Sandy soil layer [𝜆𝑟=10,00m]
	𝑑	𝑙	𝑤	𝑑	𝑙	𝑤
1/5	—	—	—	0.2𝜆𝑟	0 .8 𝜆𝑟	0.05𝜆𝑟
1/2	1.25𝜆𝑟	>3𝜆𝑟	all	0.5𝜆𝑟	0.8𝜆𝑟	0.05𝜆𝑟
2/3	0.5𝜆𝑟	all	all	0.2𝜆𝑟	≥ 0.8𝜆𝑟	all