Analysis of Plastic Zone and Pressure Variance Features of Surrounding Rock of High-Altitude Macker Tunnel: A Case Study in Jiangluling Macker Tunnel in Qinghai

<div>Layout of section measuring points and installation method of multipoint displacement meter. (a) Layout of measuring points, the borehole depth <i>L</i> = 8.0 m and aperture Φ70 mm. (b) Multipoint displacement meter installation diagram, the borehole depth <i>L</i> = 8.0–9.0 m and aperture Φ120 mm.</div>

Advances in Civil Engineering

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Figure 4: Analysis of Plastic Zone and Pressure Variance Features of Surrounding Rock of High-Altitude Macker Tunnel: A Case Study in Jiangluling Macker Tunnel in Qinghai 

Figure 4 | Analysis of Plastic Zone and Pressure Variance Features of Surrounding Rock of High-Altitude Macker Tunnel: A Case Study in Jiangluling Macker Tunnel in Qinghai 