One of the most important parameters used for determining the performance of tunnel boring machines (TBMs) is their penetration rate. The parameters affecting the penetration rate can be divided in two categories. The first category is the controllable parameters such as the TBM technical characteristics, and type and geometry of the tunnel, and the second one is the uncontrollable parameters s...

A novel optimization methodology for the disc cutter designs of tunnel boring machines (TBM) was presented. To fully understand the characteristics and performance of TBM cutters, a comprehensive list of performance parameters were investigated, including maximum equivalent stress and strain, specific energy and wear life which were closely related to the cutting forces and profile geometry of ...

Modern tunneling projects will often rely on a Tunnel Boring Machines (TBMs) rather than traditional drill and blast (D&B) methods, because of TBMs’ increased tunneling efficiency[1]. TBMs have a circular drill at the front, which can range in diameter from 1 meter to 19.25 meters, depending on the desired use for the completed tunnel. Applications of tunnels dug by TBMs range from underground ...

Microtunnelling is an increasingly popular means of locating utilities below ground. The ability to predict the total jacking force requirements during a drive highly desirable for anomaly detection, ensure available thrust not exceeded, and prevent damage pipe string and/or launch shaft. However, prediction complicated by site geology, use lubricated overcut, work stoppages, tunnel boring mach...

With the increasing use of tunnel boring machine (TBM), attempts have been made to predict TBM operating parameters. Prediction parameters is still an important step in adaptability for future. In this study, we employ a walk forward (WF) prediction method based on ARIMAX, which can consider time-varying features and geological conditions. This applied two different projects evaluate its perfor...

Recent studies have increasingly investigated construction methods for tunnel excavation because of growing underground space development. Although the New Austrian tunneling method (NATM)—a representative method—can be applied to various ground conditions, as well having good constructability and economic feasibility, it suffers from problems such vibration noise. By contrast, using a boring m...

Abstract The rock fragmentation and crack propagation of anisotropic induced by tunnel boring machine (TBM) tunneling is studied in this paper. First, a numerical model based on the 2D particle flow code (PFC2D) established calibrated to reveal four stages fragmentation. In Stage I (indentation depth 0–0.4 mm), indentation force beneath cutterhead increases decreases dramatically with accumulat...

In tunnel excavation with boring machines, the face is supported to avoid collapse and minimise settlement. This article proposes use of reinforcement learning, specifically deep Q-network algorithm, predict support pressure. The algorithm uses a neural network make decisions based on expected rewards each action. approach tested both analytically numerically. By using soil properties ahead ove...

The growing demand for transportation tunnels in densely populated urban areas has led to the widespread adoption of twin tunnel configurations contemporary infrastructure projects. This research focuses on investigating complex interaction between soil, structures, and excavation tunnels. study employs boring machine (TBM) method utilizes two-dimensional numerical modeling based finite element...