The last seismic events showed that tunnel lining may suffer extensive damage. Employing numerical modeling has a great importance in predicting the performance of tunnels. This paper tests Zaouit Ait Mellal (ZAM) twin tunnels located between cities Marrakesh and Agadir Morocco. Dynamic analysis was adopted by FLAC 2D software using finite-difference elements. Four soil cross-sections were chos...

The geological disasters caused by the ground deformation of goaf have brought huge security risks to ecological environment and society. Therefore, it is imminent realize effective monitoring stability analysis goaf. In this paper, taking gypsum mine in Diaodao District, Jingmen City as an example, through investigation overall structure distribution characteristics goaf, combined with mechani...

Autonomous listening devices are increasingly used to study vocal aquatic animals, and there is a constant need to record longer or with greater bandwidth, requiring efficient use of memory and battery power. Real-time compression of sound has the potential to extend recording durations and bandwidths at the expense of increased processing operations and therefore power consumption. Whereas los...

A Boundary Element Method (BEM) approach was developed for the analysis of pile groups. The proposed method includes: the non-linear behavior of the soil by a hyperbolic modulus reduction curve; the non-linear response of reinforced concrete pile sections, also taking into account the influence of tension stiffening; the influence of suction by increasing the stiffness of shallow portions of so...

The amount of ColI DNA transferred between mating cells of Escherichia coli K-12 increased about fourfold when rifampin-resistant donors were mated with sensitive recipients in the presence of the drug. Conjugational synthesis of ColI in dnaB recipients, shown primarily to reflect conversion of the transferred DNA into double-stranded material, was also enhanced when the recipients were treated...

ABSTRACT: A number of civil engineering projects which include river valley projects, transportation projects and metro rail projects are under construction in India. Various structures, such as underground openings, powerhouse caverns, metro tunnels, dam foundations and slopes are increasingly located in/on rock formations. The rock in its natural state is a very complex material especially wh...