Summary Reader Response draft 1
According to Harding,(2017), Mixshield is a slurry tunnel boring machine (TBM) that uses an air bubble to control and support pressure at the face made by Herrenknecht. 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, the TBM can excavate and build a ring around the machine continuously (Herrenknecht and Rehm). This is supported by Herrenknecht’s claim that the TBM is able to do so with the help from its erector and thrust system. The erector is controlled by a remote and it positions the segments during ring building whereas the thrusters are positioned around the circumferen...