Research and Application of Support Resistant Limiting Dampers in the Deep-Buried Large-Section Loess Tunnel

Table 3

Construction progress comparison table.

Scheme	Construction time (days)	Mileage	Tunneling length (m)	Progress rate (m/d)	Process proficiency
I	149	DK390 + 960∼ +520	440	4.0	Very skilled
II	140	DK390 + 520∼ +168	352	2.4	Skilled
III	5	DK390 + 168∼ +152	16	3.2	Unskilled