1,721,026 research outputs found
Reinforcement design and control of rock slopes above tunnel portals in Northern Italy
Full text linkThe stability features of slopes located above the portals of tunnels along important roads are here presented, together with two examples for reinforcement and protection works. The investigation phase and the reinforcement works have considered also the purpose of avoiding the interruption of the traffic when this would cause unacceptable consequences. The first case refers about the construction of a portal along a narrow and steep valley in a volcanick rock formation. The control of the vibration of the blasting action has been carried out for the period of the excavation in order to foresee the occurrence of potential dangerous situations. The second is the case of the portal of the East access to the Highway n.10. Even though the adits are protected by two portals, the occurrence of rock and debris falls from the upper part of the mountain could create a dangerous situation. Above the portals the morphology of the slope is characterized by two subvertical rock slopes, which are separated by an intermediate zone of debris material
FORMULAZIONE POLINOMIALE DI UN INVILUPPO DI ROTTURA PER LE ROCCE
No full textNello studio viene proposta una formulazione analitica per la determinazione di un criterio di rottura per le rocce. L'approccio è caratterizzato da una notevole semplicità dal punto di vista matematico per mantenendo una buona corrispondenza dei risultati analitici con quelli sperimentali e consentendo un confronto tra le varie formulazioni possibili. Con tale metodo è stata condotta la determinazione di un inviluppo di tipo conico per alcune rocce ben definite mediante risultati di prove di laboratorio ricavate dalla letteratura tecnica. Tali inviluppi sono messi a confronto per definire la precisione ottenuta in relazione ai dati sperimentali disponibil
Shear Resistence Tests on Municipal Wastes , Edmonton, 10-15 luglio, pp. 643-650
No full textWaste disposal involves the resolving of various geotechnical problems during the design progress of a landfill. Among these problems is that of analyzing the stability conditions of complex structures also made up of waste materials. A reliable knowledge of the geotechnical parameters of wastes is required for a correct design. This consideration, together with the lack of research so far carried oou on this subject, induced the authors to develop an experimental study with the purpose of better knowing the shear behaviour of urban wastes. In the paper the results of some direct shear tests carried out on municipa waste bales and interposed materials are presented
COMPARATIVE ANALYSIS OF ROCK BURST CASES IN METAL MINES
No full textThe paper presents an analysis of rock burst cases in metal mine
"Shear strength characteristics at geosynthetic interfaces". , S. Margherita di Pula, 13-17 Oct., pp.443-451
No full textThe paper refers about the measurement of the mechanical properties of coupled geosyntheics and soil material in order to obtain reliable geotechnical data useful on landfill stability analyses. The results of some direct shear tests are presented and discussed. The tests have been carried out by open shear box designed and built up by the autgors themselves
Geotechnical Parameters of Sanitary Wastes
No full textThe paper refers about a general approach to geotechnicla problems in waste landfill and, particularly, the determination of the mechanical prperties of wastes, as these materials are a part of the landfill. The results of some direct shear tests carried out on waste bales are represented and interpreted
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