The face failure of tunnels has been extensively studied. However, the effect of particle
shape on the failure process still remains unclear. In this paper, the progressive face failure …

Cutterhead torque is an important operational parameter that reflects the obstruction degree
of geological environment to shield tunneling machine. Accurate multi-step prediction for …

Shield machine is an essential device for underground space development, and unmanned
intelligent control of self-driving shields is productive research in tunnel construction …

Accurately acquiring the geological information of the tunnel face will help to set the optimal
operational parameters, so that the shield machine can achieve better tunneling …

Cutterhead torque is an important parameter for the design and operation of earth pressure
balance (EPB) shields. Based on the analysis of several completed project cases from job …

A self-moving ultrasonic actuator (SUA) that operated by the longitudinal traveling wave and
possessed high carrying/towing capability is developed in this article. The SUA is …

Driven by the growing requirements for long-distance tunnels, autonomous steering control
is a productive research to surpass the limitations of manual operation in steering control of …

The hydraulic thrust system that emphasizes grouped controlling of the shield machine is
used for driving forward and pose adjustment. To control and regulate the pose of the shield …

Tunnel boring machine is extremely sensitive to geological changes, and the accurate
prediction of geological conditions ahead of the tunnel face is helpful for safe and efficient …

The independent meter-in and meter-out valves control approach makes the two chamber
pressures of the hydraulic actuator completely controllable, and offers possibilities for …