Stability Analysis of Surrounding Rock and Treatment Structures in Superlarge Karst Cave of Naqiu Tunnel

Table 2

Comparison between field test results and numerical simulation results.

	Field test results (max)	Numerical simulation results (max)
Top pressure value of the pile	2 MPa∼2.5 MPa	2.5 MPa∼3.5 MPa
Pressure value between surrounding rock and retaining wall	0.2 MPa∼0.33 MPa	0.5 MPa∼0.75 MPa
Settlement value of the vault	5∼6.5 mm	4.6 mm
Tunnel convergence value	1.0 mm∼1.2 mm	0.5 mm
Displacement of the surrounding rock of the right arch	0.79 mm∼1.4 mm	2.5 mm
Initial support pressure value	0.95 MPa	1 MPa∼5 MPa