期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2016
卷号：5
期号：12
页码：20347
DOI：10.15680/IJIRSET.2016.0512015
出版社：S&S Publications
摘要：In most large infrastructure projects where the tunnels yesterday's shotcrete part of rock reinforcement.Shotcrete is admixture of cement, aggregate, water and various additives such as accelerators that sprayed on such arock surface. It is also possible to use steel fibers in this mixture, which go at a considerably greater tensile strength. Inthis case, usually rock reinforcement also consist of rock bolts, which bolts are different in length among others can beembedded in the rock. These can then be with washers on the outside of the concrete surface to prevent excessivetension will occur at the bolts. Normally, empirical methods or assumption that the spray concrete acts as a concreteslab to determine how rock reinforcement should be designed. This provides a rock reinforcement that can probably beoversized, which means that there is a need of design methods that provide an accurate picture of how the shotcretework. Previously numerical models used to investigate a sprayed concrete reinforcement. This work is a preliminarystudy to a larger research project on shotcrete. The report reviewing the existing literature on the fields, trying todescribe the practical problems occurs during construction, and using a development of the numerical model previouslyused to analyze the same problem in 3D. The results show that the conclusions made earlier are relatively well in 3Dand that several of the conclusions of the earlier study also consistent with this model. This study concludes withsuggestions for further research and emphasizes the need to use the rock mass as part of rock reinforcement in futuremodels, where especially the adhesion that occurs between shotcrete and rock is an important parameter because thenumber of crimes in the shotcrete seems interact with this parameter.
