| 摘要 |
<p>A grout pack is provided comprising a grout bag (1 ) and a restraining envelope encircling the grout bag. The restraining envelope includes multiple elongate tension elements (8, 10, 15, 16, 18, 21, 30, 35) made of a multitude of fibres twisted, braided or woven to form confinement tension elements for operatively supporting the grout bag. The fibres are preferably polymer fibres and include one or more of polypropylene, nylon, polyesters, polyethylene and aromatic polyamides. The restraining envelope may include an inner mesh layer (7, 20) positioned on the inside of the elongate tension elements. At least some elongate tension elements may assume the form of containment rings (8, 21 ) encircling the grout bag at spaced positions up the height of the grout pack. Alternatively, or in addition, at least some elongate tension elements (10, 15, 18, 30, 35) may extend in generally helical directions of opposite hand in the installed condition of the grout pack. The tension element may assume the form of a rope (8, 10). or a length of webbing (15, 18, 21, 30, 35). The ends of the rope or webbing may be joined in a manner providing for controlled slipping of overlapping ends thereof.</p> |
