Vibration Induced by Subway Trains: Open-Trench Mitigation Analysis in the Time and Frequency Domains

Table 5

Numerical simulation cases.

Case	Purpose of analyses	Depth, (m)	Width, (m)	Distance, (m)	Type of isolation trench
1	Trench width	18	0.5, 1, 2	9	Open trench
2	Trench depth	6, 12, 18	2	9	Open trench
3	Trench position	18	2	5, 9, 13	Open trench