Fig. 2

Plan and profile views of the Tuanjie Tunnel. The satellite imagery in Fig. 2 was sourced from the online website of “Google Earth”. The version number is “10.67.0.5”.

Plan and profile views of the Tuanjie Tunnel. The satellite imagery in Fig. 2 was sourced from the online website of “Google Earth”. The version number is “10.67.0.5”.