Why do you need a large T-Log file? Do your database frequently have huge transaction, like insert\update\delete?
If not, the T-Log should have an optimum size.
Now, if your T-Log reaches the maximum then u can shrink the T-Log by having any of the below methods/::
1. Taking frequent T-log backups.
2. run DBCC Shrinkfile to reduce the file size.
Also u can attach more log files if required.
Regards
Sourav