Distribution of Articles published per year
(2013 - 2018)
(2013 - 2018)
Total number of journals
Article 0 Reads 0 Citations Convergence-confinement curve analysis of excavation stress and strain resulting from blast-induced damage Published: 01 March 2018
Tunnelling and Underground Space Technology, doi: 10.1016/j.tust.2017.12.005
Using the convergence-confinement curves methodology, we analysed excavation behaviour for a range of rock masses of different geotechnical qualities, taking into account blast-induced damage. The novelty of the research is (i) we include blast-induced damage to the rock mass in ground reaction curve construction, and (ii) we analyse results for 54 rock mass and rock geotechnical quality scenarios. The research, an application of a previously developed methodology (González-Cao et al., 2013), provides practical guidelines for the preliminary design phase for an excavation resulting from blasting. Our main conclusions are (i) that rock mass quality has a greater bearing on the plastic radius and excavation maximum displacement than blast-induced damage, and (ii) that the plastic radius and maximum displacement around an excavation increase with the level of blast-induced damage, most especially for poor quality rock masses. This would justify the need to limit blast-induced damage in poor quality rock masses.
Article 0 Reads 0 Citations Analysis of the hydrological safety of dams combining two numerical tools: Iber and DualSPHysics Published: 01 February 2018
Journal of Hydrodynamics, doi: 10.1007/s42241-018-0009-6
The upgrade of the hydrological safety of dams is a critical issue to avoid failures that can dramatically affect people and assets. This paper shows a numerical methodology to analyse the safety of the Belesar dam (NW, Spain) based on two different numerical codes. First, a mesh-based code named Iber, suited to deal with large 2-D domains, is used to simulate the impoundment. The initial conditions and the inlet provided to Iber correspond to the maximum water elevation and the maximum expected inflow to the impoundment defined in the technical specifications of the dam, which are associated to the more hazardous operation conditions of the dam. Iber provides information about the time needed for water to attain the crest of the dam when floodgates are closed. In addition, it also provides the velocity of discharge when gates are opened. Then, a mesh-free code named DualSPHysics, which is especially suited to deal with complex and violent 3-D flows, is used to reproduce the behaviour of one of the spillways of the dam starting from the results obtained with Iber, which are used as inlet conditions for DualSPHysics. The combined results of both model show that the left spillway can discharge the surplus of water associated to the maximum inflow to the reservoir if the gates of the spillways are opened before the overtopping of the dam was observed. In addition, water depth measured on the spillway is considerably lower than the lateral walls, preventing overtopping. Finally, velocities at different points of the spillway showed to be in good agreement with theoretical values.
Article 0 Reads 3 Citations Towards simulating floating offshore oscillating water column converters with Smoothed Particle Hydrodynamics Published: 01 August 2017
Coastal Engineering, doi: 10.1016/j.coastaleng.2017.05.001
Article 0 Reads 0 Citations Numerical modelling of hydrological safety assignment in dams with IBER Published: 24 May 2017
Sustainable Water Resources Management, doi: 10.1007/s40899-017-0135-2
The hydrological safety of dams is a key factor to be analysed in order to avoid human and economic losses. The exceedance structures of the dams play a crucial role in its hydrological safety. They are usually designed by means of hydrological methods that solve analytical solutions that follow several simplifications. The numerical code IBER, which can combine a hydrologic study with a hydraulic model, could provide more accurate results in order to obtain peak flows and to calculate exceedance levels of a dam. In the present work, both analytical and numerical methods are applied to analyse the hydrological safety of “La Esperanza” dam (Tulancingo, Hidalgo State, Mexico). Numerical results show that this dam could be at hydrological risk for peak flow values associated to return periods higher than 15 years. In order to improve the hydrological safety of the dam, a series of modifications of the geometry of the exceedance structures are also simulated using the IBER software.
Article 0 Reads 1 Citation Ground reaction curves for circular excavations in non-homogeneous, axisymmetric strain-softening rock masses Published: 01 December 2013
Journal of Rock Mechanics and Geotechnical Engineering, doi: 10.1016/j.jrmge.2013.08.001