Sökning: "rock reinforcement"
Visar resultat 1 - 5 av 13 avhandlingar innehållade orden rock reinforcement.
1. Dynamically loaded rock reinforcement
Sammanfattning : .... LÄS MER
2. Structural behaviour of shotcrete in hard rock tunnels
Sammanfattning : Tunnels in hard and jointed rock are normally excavated in an arch shape to enable the rock mass to support its weight. Since the beginning of the 1980's, fibre reinforced shotcrete (FRS) in combination with rock bolts have been the dominating support method for hard rock tunnels. LÄS MER
3. Experimental investigation of steel cables for rock reinforcement in hard rock
Sammanfattning : This thesis describes a detailed experimental investigation of the mechanical behaviour of fully grouted steel cables used for rock reinforcement in hard rock. An attempt is also made to explain the possible modes of deformation and cable failure, based on observations from the experiments. LÄS MER
4. Models for analysis of shotcrete on rock exposed to blasting
Sammanfattning : In underground construction and tunnelling, the strive for a more time-efficient construction process naturally focuses on the possibilities of reducing the times of waiting between stages of construction. The ability to project shotcrete (sprayed concrete) on a rock surface at an early stage after blasting is vital to the safety during construction and function of e. LÄS MER
5. Time dependent material properties of shotcrete for hard rock tunnelling
Sammanfattning : In this thesis different mechanical properties for shotcrete (sprayed concrete) such as compression strength, bond strength, bending tensile strength, elastic modulus, free and restrained shrinkage as a function of its age was investigated. One of the main issues was to investigate the difference between ordinary cast concrete and shotcrete. LÄS MER