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

Table 2

Depth of the trench and ratio depth/thickness of layer.

Parameters	Assumed values
𝑑 (m)	2, 5, 8, 11,14
𝑑/ℎ	1/5, 1/2, 2/3