Drainage pipe blockage resulting from crystals is one of the causes for cracking and leakage tunnel lining. Therefore, effective prevention drainage caused by crucial to ensure safety stability lining structures during operation system. Based on a large number indoor model tests numerical simulation analyses, binding energy between four materials calcium carbonate aqueous solution (“solid + liq...

considerations on the explosion resistant design of special infrastructures have increased in the recent years. amongst the various types of infrastructures, road and railway tunnels have a unique importance due to their vital role in connection routes in emergency conditions. in this study, the explosion effects of a projectile impacting on a railway tunnel located in a jointed rock medium has...

Abstract The measured swelling pressures against tunnel linings range between a fraction of one MPa and 6–7 MPa. A strong spatial heterogeneity is often observed. paper integrates these considerations into procedure to design in anhydritic formations. Three-dimensional effects proper consideration shown be consistent with monitoring data lining reinforcement stresses. calculation methodology il...

In this paper, a practical project of subway tunnel lining demolition via blasting for the construction station under action load and weight collapsed rock mass was proposed. The overbreak underbreak quality, failure mechanism structure, particle peak velocity (PPV), stress evolution law surrounding caused by were researched using LS-DYNA. Firstly, results show that parameters presented in pape...

The anterior tarsal tunnel syndrome (ATTS) has first been described by Kopell and Thompson in 1963. The anterior tarsal tunnel is formed by the fascia lining the inferior extensor retinaculum and talus as well as the navicular bone. Many ATTS cases with various etiologies have been reported since the first description. We report here an ATSS case resulting from a fibro-osseous structure that oc...

This paper presents a genetic algorithm for automating the design process for underground tunnels. The tunnel cross-sectional profile must enclose a prescribed minimum space polygon, and for stability the bending moments in the shotcrete lining must not exceed certain limits. The engineer seeks to achieve these aims while minimizing the volume of rock to be excavated. We describe the five param...