New Construction Technology of a Shallow Tunnel in Boulder-Cobble Mixed Grounds

<div>Contact pressure distribution between primary support and secondary lining (unit: kPa). (a) Pressure distribution of section 150. (b) Pressure distribution of section 920.</div>

Advances in Civil Engineering

fig19

Figure 19

Figure 19: New Construction Technology of a Shallow Tunnel in Boulder-Cobble Mixed Grounds 