Essays about: "rock bolts"
Showing result 1 - 5 of 19 essays containing the words rock bolts.
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1. Soft Values are Game Changers for Manufacturing Companies : Identifying, Creating and Capturing Consumer Values
University essay from Linköpings universitet/Projekt, innovationer och entreprenörskapAbstract : Business strategies for competitive succession have been captivating the attention of scientists and entrepreneurs from all over the world. As more competitive circumstances are reached within a market, the value perspective expressed by consumers becomes increasingly relevant. READ MORE
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2. Environmental and technical evaluation of cement reduction and test methods for fibre reinforced shotcrete in tunnels
University essay from KTH/BetongbyggnadAbstract : The dominating support method for hard rock tunnels today is use of fibre reinforced shotcrete in combination with rock bolts. The fibre reinforced shotcrete secures smaller blocks, while rock bolts are used to support larger blocks in the rock. Application of shotcrete is done by spraying against the rock surface using compressed air. READ MORE
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3. Optimization of support in rock pillars between two parallel tunnels
University essay from KTH/Jord- och bergmekanikAbstract : When two parallel tunnels are excavated under high to moderate horizontal in-situ stresses combined with minor deformations in the pillar between the tunnels, the in-situ stresses can be redistributed over the tunnels in form of two compressive arches and are transferred from the roof to the abutments of the two tunnels. At additional deformations in the pillar, a new redistribution of the stresses can occur creating one compressive arch over both of the tunnels. READ MORE
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4. EVALUATION OF ENVIRONMENTAL AND TECHNICAL PERFORMANCE OF ALTERNATE FIBRES FOR SHOTCRETE IN TUNNELS
University essay from KTH/BetongbyggnadAbstract : 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. READ MORE
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5. Design of tunnel support for single zones with swelling clay
University essay from KTH/Jord- och bergmekanikAbstract : Swelling clay is an important and challenging geological feature in tunnelling projects.The behaviour of swelling clay is influenced by many internal and external factors.This, combined with a lack of experience and knowledge has resulted in challengeswhen accounting for the swelling phenomena. READ MORE