In mechanized tunneling, so-called tunnel boring machines (TBMs) drill through the ground in an automatized manner. Therefore, drilling process is very efficient but maintenance costs are high. Seismic exploration seems appropriate to identify changing conditions front of TBM reduce from damages and corresponding dwell times. Today's seismic techniques using only a small amount information, whi...

Some microbes, among them a few species of cyanobacteria, are able to excavate carbonate minerals, from limestone to biogenic carbonates, including coral reefs, in a bioerosive activity that directly links biological and geological parts of the global carbon cycle. The physiological mechanisms that enable such endolithic cyanobacteria to bore, however, remain unknown. In fact, their boring cons...

Introduction: The application of intelligent learning methods to the mining characteristics and rules time-series data has gained increasing attention with rapid development deep learning. One critical such is assistant driving tunnel boring machines (TBMs), for which optimization parameters essential improve construction efficiency. However, existing prediction models TBM are “static” cannot d...

• A load model of shield machine is developed considering the pose. The static characteristics thrust parallel mechanism are studied. new proposed to determine total and grouped thrusts. verified by an engineering case. hydraulic system that emphasizes controlling used for driving forward pose adjustment. To control regulate precisely, it great significance solve thrusts (thrusts different cyli...

For tunneling in urban areas, understanding the interaction and behavior of tunnels foundation adjacent structures is very important, various studies have been conducted. Superstructures areas are designed constructed with piled rafts, which more effective than conventional foundation. However, settlement a raft induced by mostly focuses on settlement. In this study, therefore, pile settlements...

Practical Tunnel-boring Machine (TBM) guidance systems usually use sophisticated instruments to obtain the orientation of the TBM. These systems require frequent calibration and work shutdown, making the procedure complex and time consuming. Besides, the majority of current TBM guidance solutions cannot provide the position of the invisible cutter head analytically including commonly used laser...