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List of products by author: G. M. Volkmann
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Analysis of Safety Issues and Installation Time of Innovative Pipe Umbrella Installation Methods
Abstract: Pipe umbrella support systems have been used successfully for tunneling in challenging ground conditions since the 1970’s. Due to further developments of the drilling machinery, this pre-support system is used at shallow tunnels in weaker ground conditions on a regular basis. Pipe umbrella pipes are installed stepwise by connecting pipes to each other so the processes “coupling” and...
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Development of Innovative Connections for Pipe Umbrella Support Systems
Abstract: Pipe umbrella support systems have been used successfully for tunneling in challenging ground conditions since the 1970’s. Historically, the drilling unit was the limiting factor for pipe umbrella installations - less attention has been paid to pipe couplings and their influence on labor time and load-bearing capacity. The present paper describes the development of two new alternative...
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