Numerical Simulation Research on the Stability of Urban Underground Interchange Tunnel Group

Table 3

Analysis of sectional diagram simulation results.

The serial number	Position	Concentration value (MPa)	The lithology
1	Baopeng gap—K19 + 600	1.5	Plain fill
2	Baopeng ramp—K0 + 700	2.7	Plain fill/moderately weathered granite
3	Baopeng gap—K19 + 480	2.3∼3	Plain fill
4	Qiaocheng-Baopeng ramp interchange—K0 + 920	23.8	Slightly weathered granite
5	Qiaocheng-Baopeng tunnel group—K3 + 760	8∼10	Plain fill/moderately weathered granite /massive weathered granite/slightly weathered granite
6	Qiaocheng long-span J4 gradient section -K3 + 560	8∼9	Plain fill/moderately weathered granite /massive weathered granite/slightly weathered granite
7	Baopeng gap—K19 + 000	2.3∼2.4	Plain fill
8	Baopeng gap—K18 + 720	2∼3	Plain fill
9	Qiaocheng gap—K3 + 240	4.5∼5.6	Slightly weathered granite