Estimation of tunnel diameter convergence is a very important issue for tunneling construction, especially when the new Austrian tunneling method (NATM) is adopted. For this purpose, a systematic convergence measurement is usually implemented to adjust the design during the whole construction, and consequently deadly hazards can be prevented. In this study, a new fuzzy model capable of predicti...

Driven by progress in sensor technology, computer software and data processing capabilities, terrestrial laser scanning has recently proved a revolutionary technique for high accuracy, 3D mapping and documentation of physical scenarios and man-made structures. Particularly, this is of great importance in the underground space and tunnel construction environment as surveying engineering operatio...

the ground reaction curve (grc) is a vital component of the convergence-confinement method, which possesses many applications in the underground space designs. it defines a relation between the tunnel wall deformations and the ground pressure acting on the tunnel walls. generally, grc includes descending and ascending branches. according to many researchers, the descending branch trend for the ...

Underwater shield tunneling will disturb the soil near river, especially in water-rich soft ground. This may cause a groundwater infiltration hydraulic gradient to exceed critical value, leading calamities, such as unexpected flooding or submerged erosion. To ensure security of construction and stability river embankment seepage, it is crucial assess safety underwater tunnel cover thickness. A ...

urban facilities are necessary components of cities. in all grown and developed cities of the world there are tremendous network of facilities such as water and electric ties, water sewage drainage, water piping and gas piping. that has not been installed in proper depth underground and locations and with growing of the cities and consumption of population. they need to be replaced by excavatin...