<p>The 10.6 km long Sabzkuh water conveyance tunnel is currently under construction in the High Zagros structural zone, located in western <br />Iran, through conventional (in section T1) and mechanized (in section T2) methods. The section T1 of the ...

<p>Traffic congestion and environmental factors are creating a demand for greater utilization of underground spaces in urban areas. In mechanized excavation of subway tunnels, the Earth Pressure Balanced Shield (EPBS) has been developed in the recent decades ...

The tunnel of the Tabriz urban railway line 2 (TURL2), Iran, will pass through an underground commercial center on its way. Too little distance between the tunnel crown and the underground structure foundation will probably cause collapse or excessive settlement ...

Overstressing of the rock surrounding a tunnel can result in either brittle fracture of the intact rock or shear failure along pre-existing discontinuities such as joints or shear zones. These two types of failure can co-exist and the extent to which the failures ...

<p>The possibility of partial failure of large slurry shield-driven tunnels is investigated by an upperbound approach in limit analysis and a three dimensional numerical modeling for the Shanghai Yangtze River Tunnel. The results of the upper-bound limit analysis ...

<p>The state of art of tunnel earthquake damages and tunnel earthquake damage mechanism are briefly introduced in this paper. According to tunnel&rsquo;s traffic function and damage descriptions based on the investigation, tunnel damages are divided into five ...

The large number of rock falls, the danger associated with such events and the frequency of their occurrence, especially in the deep mining activities in South Africa, has led to the development of a smart material (Smartbolt TM). Some 50% of underground fatalities ...

During a Tunnel Boring Machine (TBM) project in Kunming city, Southwestern China the engineering geological conditions encountered at a distance of 7km consisted of folded, faulted, weak rocks, high ground stress and groundwater problems. The problems of collapse, ...

The highly variable nature of deeply weathered Oporto granite posed significant challenges in the driving of the 2.3km long Cline and the 4km long S line of the Oporto Metro project. Two 8.7m diameter Herrenknecht EPB TBMs were used to excavate these tunnels ...

<p>A general requirement of mine site closure is that waste rock dumps, generated by the excavation of large quantities of overburden in open cut mines, should be rehabilitated to create stable, sustainable landforms. However, many factors affect the success ...