Continuous tunneling using a tunnel-boring machine is very popular method when it comes to the construction of large tunnel projects. The use precast reinforced concrete elements, called tubbings, highly economical way secure post excavation. Unfortunately, loss load-bearing capacity has been observed in past joints between tubbings. Reasons for that are among others required reduction cross se...

Pre-tunneling exploration for rock mass classification is a common practice in tunneling projects. This study proposes data-driven approach that allows classification. Two machine learning (ML) models, namely random forest (RF) and extremely randomized tree (ERT), are employed to classify the conditions encountered Pahang-Selangor Raw Water Tunnel Malaysia using tunnel boring (TBM) operating pa...

In this paper, we explore the fundamental physics behind the application of electrical resistivity and induced polarization during tunnel boring machine (TBM) mining. Using finite element (FE) analysis, we model the electric field created when current is injected into the surrounding ground via electrodes in the TBM cutterhead. The FE analysis simulates a variety of materials and conditions inc...

In this paper, a general linear time-varying multiple-axis (LTVMA) vibration model of shield tunnel boring machine (TBM) cutterhead driving system is established. The corresponding multiple inputs and multiple outputs (MIMO) state-space model is also presented. The linear vibration model is analysed, and the vibration-torque transfer function matrix and the vibration-torque static gain matrix a...

Disc cutter is Full face rock tunnel boring machine (TBM) important rock breaking tool, cutting heat generation has an important influence on cutter life, disc cutter cutting temperature characteristic research be imperative. Based on heat conduction theory to establish disc cutter cutting temperature heat conduction model, and derive its solution; analyze influence on disc cutter cutting tempe...

Improving of the quality of the disc cutters’ plane layout design of the full-face rock tunnel boring machine (TBM) is the most effective way to improve the global performance of a TBM. The plane layout design of disc cutters contains multiple complex engineering technical requirements and belongs to a multi-objective optimization problem with multiple nonlinear constraints. Based on analysis o...

An automated modelling and control design environment for serial manipulators has been implemented in Matlab/Simulink. This development was motivated by the need for a fast and insightful modelling tool, given that currently available modelling environments are not well suited for control design. The manipulator configuration is defined within a graphical user interface and the corresponding ma...

Bioerosion by boring sponges is an important mechanism shaping the structure of coral reefs all around the world. To determine the excavation rate by boring sponges, we developed a system in which chemical and mechanical boring rates [calcium carbonate (CaCO(3)) dissolution and chip production, respectively] were measured simultaneously in experimental tanks containing reefal rock inhabited by ...