| 摘要 |
<p>The procedure, for use on large-diameter concrete pipes (1, 2) with thin sheet metal reinforcing cores (3, 4), is carried out from the inside of the pipes and consists of removing the concrete covering the inner surface of the joints to expose the metal reinforcing layer and fitting a welded joint in the form of a metal collar (10) over reinforcing rings (5, 6) on the ends of the core metal and covering them with an expansion joint of a supple and impermeable material and a layer of cement (9) and a food-grade finishing mortar (15). The expansion joint is made from a textile material, preferably linen, with a polymer coating.</p> |
