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List of products by author: A.-L. Hammer
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Analysis of multilateral interaction between shotcrete, yielding support and squeezing ground by means of two...
Abstract: Squeezing behaviour, which might be observed in tunnelling through the weak ground under high in-situ stresses, yield large deformations at tunnel boundaries. To control this ground convergence and provide tunnel stability, it is essential to implement some precaution measures such as implementing the yielding supports. These yielding elements are installed and embedded between the lining...
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Integration of yielding elements in various computational methods for calculations in different planning and...
Abstract: Squeezing behavior in tunneling can occur through weak ground and high overburden. It results in high convergences at the tunnel cavity. The integration of yielding elements into the sprayed concrete lining is a well-proved method to prevent the overloading of sprayed concrete linings. The predefined load-deformation behavior of the yielding elements enables a planned ground deformation of the...
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Practical Application of a Cement-free Shotcrete for Tunnel Refurbishment
Abstract: Existing road and railway tunnels in Central Europe increasingly show signs of aging and deterioration, which is particularly evident in the tunnels’ inner lining. Due to dramatic tunnel fires, and novel research findings, German authorities have reviewed and revised several guidelines for the design of tunnel structures in recent years. In the national research project KOINOR, a cement-free...
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