Zhi Sheng

According to Harding (2017), Mixshield is a slurry tunnel boring machine (TBM) that utilizes an air bubble to manage and stabilize pressure at the tunnel face. The tunnel face refers to the foremost part of a tunnel excavation where the actual digging or cutting of the tunnel occurs. Herrenknecht further explains that the TBM has an automatic air cushion that precisely controls the face support pressure in the excavation chamber (Herrenknecht,2024). The TBM also offers an array of powerful cutting tools such as cutting knives and disc cutters. It is enhanced by jawcrushers positioned in front of the intake screen to further breakdown boulders and stones into conveyable size pieces (Herrenknecht, 2024). According to Herrenknecht and Rehm (2003), the TBM can excavate and build a ring around the machine continuously. This is supported by Herrenknecht’s claim that the TBM can do so with the help of its erector and thrust system. The erector is controlled by a remote and it positions the se...

According to Harding,(2017), Mixshield is a slurry tunnel boring machine (TBM) that utilizes an air bubble to manage and stabilize pressure at the tunnel face. The tunnel face refers to the foremost part of a tunnel excavation where the actual digging or cutting of the tunnel occurs. This is further explained by Herrenknecht. The TBM has an automatic air cushion that precisely controls the face support pressure in the excavation chamber (Herrenknecht,2024). It also offers an array of powerful cutting tools such as cutting knives and disc cutters. It is enhanced by jawcrushers positioned in front of the intake screen to further breakdown boulders and stones into conveyable size pieces (Herrenknecht, 2024). According to Herrenknecht and Rehm (2003), the TBM can excavate and build a ring around the machine continuously. This is supported by Herrenknecht’s claim that the TBM can do so with the help of its erector and thrust system. The erector is controlled by a remote and it position...