Functions of trail voild grout are described and necessary properties of the grout mortar to fulfill these functions are discussed. A simple model is derived to show the loading on the lining along the axes of the tunnel as a function of the mortar properties ad the possible movement of the lining. When it takes a long time for the grout mortar to consolidate or to harden, resilting in buoyancy forces on the lining over a certain length, this can lead to considerable forces in the lining of a tunnel as well as on the TBM. This is shown with some indicative example calclations, for conditions measured in 2 projects and 3 different grout mortars.
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Ruang Koleksi Umum
Rak: 2