A series of model tests were performed to investigate the load-bearing mechanism a mined railway tunnel lining under water pressure. To characteristics different types linings, fully closed pressure exerting device for noncircular section was invented. large-scale test (1:30) combined and soil pressures conducted mechanical characteristics, deformation, stress distribution, crack development pr...

In this paper, a systematic approach is presented for optimal design of tunnel support lining using two-dimensional finite element analysis models of soil-structure interaction developed in ABAQUS software and the Modified Colliding Bodies Optimization (MCBO) algorithm implemented in MATLAB environment. This approach is then employed to study the influence of variable geometrical and geo-mechan...

Abstract Stability of large underground structures depends on not only rock mass conditions but also excavation stages and support systems. In addition, complexity geological interaction with in situ affect the performance design. The Akyazı tunnel (Trabzon, Turkey) is 2478 m long was designed as 3 lanes double tubes, number at junction part increases to 5. Tunnel cross-sectional area from reac...

Electromagnetic radiation (EMR) technology makes it possible to evaluate changes in the stress-strain state (SSS) “tunnel lining-enclosing rock mass” system at a high level of interference, and create schemes long-term EMR control tunnels (geotechnical monitoring systems). The issues variations signals are extremely important for systems: based on anomalous deviations from normal regime one can...

When constructing tunnels in mountainous areas, the drilling and blasting method is most commonly used because of its economy. Ordinary reinforced concrete itself has defects such as poor crack resistance brittleness. Therefore, when using for ordinary double-line tunnels, vibration phenomena will occur cause cracks first-line which have adverse effects on durability safety tunnel. As a respons...

Hyperstatic Reaction Method (HRM) is a simple but effective method with attractive features in calculating internal forces and deformations of the tunnel lining. The superior ability HRM under static conditions inspires further development this for seismic design. This paper implements an improved estimating seismic-induced lining quasi-static condition. To end, modification parameter (a) appro...

A new theory termed "tunnel-acid-group-potential" (TAGPT), explaining the effect of pHo and pH(i) on ion conductance through different membrane channels, is presented. It is suggested that shifts in pHo and pH(i) lead to changes in values of negative charges generated by acid groups of side chains of some polar (Glu-, Asp-) amino acid residues, lining the tunnel part of the channel. The resulti...