An automatic process for estimating ground stability and settlement of circular tunnels is developed practitioners in this paper using finite difference method FLAC code. The numerical model aims to simulate the movement relaxation soil around shield lining annulus that occurs due overcutting grouting tunnel void by a boring machine. To achieve this, uses pressure technique progressively reduce...

In order to cope with multi-dimensional mine disasters in deep mines, enhance the adaptability of open tunnel-boring machine (TBM) actual working face environment, and improve excavation speed TBM, based on project Gaojiapu Coal Mine Zhengtong Industry, Shaanxi Province, this paper comprehensively considers difficulties encountered by TBM process improves system its supporting equipment. The re...

Extensive research has confirmed the successful prediction of rock mass quality in tunnel boring machine (TBM) construction using learning methods based on big data collected during process. However, developed model cannot be applied to a new project owing different mechanical and environmental features involved projects. This study tries combine datasets three TBM projects whose cutterhead dia...

To date, the accurate prediction of tunnel boring machine (TBM) performance remains a considerable challenge owing to complex interactions between TBM and ground. Using evolutionary polynomial regression (EPR) random forest (RF), this study develops two novel models for performance. Both can predict penetration rate field index as outputs with four input parameters: uniaxial compressive strengt...

The gripper cylinder that provides braced force for Tunnel Boring Machine (TBM) might fail due to severe vibration when the TBM excavates in the tunnel. Early fault diagnosis of the gripper cylinder is important for the safety and efficiency of the whole tunneling project. In this paper, an online condition monitoring system based on the Empirical Mode Decomposition (EMD) method is established ...

Abstract Prediction of machine performance is a fundamental step for planning, cost estimation/control and selection the type when using tunnel boring (TBM). Penetration rate (PR) utilization (U) are two principal measures TBM evaluating feasibility in given ground condition. However, despite widespread use TBMs established track records, accurate estimation could still be challenge, particular...

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...

saymareh dam and hydro-power plant are under construction on saymareh river in ravandi anticline, ilam province. during boring the power tunnel which crosses the anticline, a large volume of water was encountered. this volume of water was not observed in the past. considering the water quality of springs, water level of dam site piezometers, geological and hydrogeological inspections, isotope a...