Segment assembling is one of the principle processes during tunnel construction using shield tunneling machines. The segment erector a robotic manipulator powered by hydraulic system to assemble prefabricated concrete segments onto excavated surface. Nowadays, automation has become definite developing trends further improve efficiency and safety construction; thus, closed-loop motion control an...

Abstract During shield machine construction, the precise determination of control parameters is particularly important for construction safety. By effectively using big data and mining information in it, accurate with geological adaptability can be obtained real time. To this end, study proposes an intelligent online prediction method screw rotation speed Earth pressure balanced (EPB) based on ...

It is very important for controling ground deformation, ensuring safely operation and decreasing energy cost to perform harmoniously control of multi-system in shield tunneling. The decision suport system is proposed based on in-situ observed data in sheild tunneling. The soil charactiristics are identified according to in-situ observed data and fuzzy clustering model of soil layer classificati...

RESULTS: Nine of the 10 arms were male. The APL tendon had a mean of 3.3 ± 1.3 slips. The EPB tendon had one slip in all specimens. Seven compartments (70%) had an identifiable EPB subcompartment and four (57%) were thick. An osseous ridge was seen in 2 specimens, both with a thick subcompartment. The two arms with osseous ridges revealed radiopaque ridges on x-ray. Radiologists’ x-ray reviews ...