Research on In Situ Stress Distribution of the Railway Tunnels in Southwest China Based on the Complete Temperature Compensation Technology

Table 1

Surface location of each measuring point and parameters of the test hole for in situ stress.

No.	Location	Mileage	Hole depth (m)	Borehole inclination	Buried depth (m)	Surrounding rock grade	Surrounding rock properties
1#	Manmo Tunnel	DK413 + 505	19.3	3.5°	320	IV	Mudstone intercalated with sandstone, shale, and conglomerate
2#	No. 2 inclined shaft of the Mamushu Tunnel	X2DK0 + 009	18.1	3.1°	450	III	Mudstone, shale intercalated with sandstone
3#	Exit of the Mamushu Tunnel	DK430 + 985	20.5	3°	120	IV	Mudstone intercalated with sandstone
4#	Exit of the Mamushu Tunnel	DK430 + 560	18.6	3.6°	220	IV	Shale intercalated with mudstone, sandstone, slate, and marl
5#	No. 3 inclined shaft of the Mamushu Tunnel	DK429 + 480	19.6	2.6°	540	IV	Quartz sandstone intercalated with sandstone and mudstone

Note. Upward inclination of the borehole is positive.