Abstract During the tunneling process of shield machine, accurate determination parameters is guarantee safe operation machine. Through real-time construction data analysis and mining at next moment are obtained in real-time. Based on this, this paper proposes an intelligent prediction method for multi-region thrust EPB machine based Sparrow Search algorithm-Long Short-term Memory (SSA-LSTM). B...

Recently, many studies have been conducted on the stratum deformation induced by earth pressure balance (EPB) shield tunneling in soft soil and sand. Movement laws vary largely among different strata. However, at present, relevant research mainly focuses sand, whereas little attention has paid to movement law of round gravel with higher instability. In this study, a field monitoring test was ca...

This study demonstrates a three-dimensional numerical simulation of earth pressure balance (EPB) shield tunnelling using coupled discrete element method (DEM) and finite difference (FDM). The analysis adopted the actual size spoke-type EPB tunnel boring machine (TBM) consisting cutter head with cutting tools, working chamber, screw conveyor, shield. For model to reproduce in situ ground conditi...

Soil conditioning is a key factor in increasing tunnel face stability and extraction efficiency of excavated soil when excavating tunnels using an earth pressure balance (EPB) shield boring machine (TBM). Weathered granite soil, which abundant the Korean Peninsula (also Japan, Hong Kong, Singapore), has different characteristics than sand clay; it also particle-crushing characteristics. Conditi...

In the tunnelling industry, a large share of market is occupied by EPB (Earth Pressure Balance) machines. To operate this kind machine, radical change in rheological behaviour excavated soil must be performed, and achieved adding water, foam, and, eventually, polymers. The stability foam assessed through half-life test. main limitation test that only one value used characterization degradation ...

Uncertainty is often the most significant source of risk associated with a project in tunnel and underground construction. Unforeseen uncertainties can lead to construction problems leading reduced advances delays, cost increases, damage existing infrastructure and/or building equipment. The M5 metro line, which subject study, located Uskudar – Umraniye - Cekmekoy Sancaktepe district on Asian s...

Earth pressure balance tunnel boring machines (EPB-TBMs) are favorably applied in urban tunneling projects. Despite their numerous advantages, considerable delays and high maintenance cost are the main disadvantages these machines suffer from. Reliability, availability, and maintainability (RAM) analysis is a practical technique that uses failure and repair dataset obtained over a reasonable ti...