No document
Search & filter
Search for a publication
Search & filter
List of products by author: L. Ahmed
-
Evaluation and analysis of laboratory tests of bolt-anchored, steel-fibre-reinforced shotcrete linings
Abstract: Results from laboratory tests on statically loaded bolt-anchored, steel-fibre-reinforced shotcrete linings in interaction with rock are here evaluated using a 2D finite element model. Calculations are made to determine the state of stress in the rock-shotcrete interface near the rock joints. Plane-stress elements are used with a non-linear material model, capable of describing cracking and...
0,00 € -
Vulnerability of newly sprayed shotcrete on hard rock during blasting operations
Abstract: Blasting operations during tunnelling through hard rock causes propagating vibrations that can damage rock support systems and installations. The effect from vibrations on young and recently applied shotcrete (sprayed concrete) has been studied through finite element modelling and testing, in situ and also in laboratory. The study aims at an establishment of recommendations and guidelines for...
0,00 € -
Vulnerability of shotcrete on tunnel walls during construction blasting
Abstract: Detonation of explosives during excavations of tunnels and underground spaces give rise to stress waves that transport energy through the rock and these may, depending on the magnitude of the waves, cause severe damage to permanent installations and support systems within the rock, such as shotcrete. Today there are no reliable and established guidelines for when blasting can be allowed close...
0,00 €
