| 摘要 |
A pipe joint for large diameter steel pipe in the range of 54 to 140 inches or greater, reinforced plastic-mortor pipe larger than 42 inches, ductile-iron pipe larger than 30 inches, and glass reinforced plastic pipe larger than 20 inches which includes a spigot having an annular groove formed between two spaced ribs for receiving an annular gasket which extends outwardly beyond the ribs. Under usual circumstances, when the spigot is positioned within the bell of the adjacent pipe, the gasket engages the interior surface of the bell as well as the surfaces of the annular groove in the spigot. However, during assembly in those instances where the bell and/or the spigot are out of round, the spigot can be forced toward the bell so that the gasket engages the inner surface thereof around its entire periphery and can be held temporarily thereagainst by means of jacks and braces. In either event, once properly positioned the joint is completed by placing grout between an extending lip of the spigot and the inner surface of the bell. When the grout hardens it will maintain the gasket in position against the surface of the bell even after the braces and jacks are removed and will enhance the ability of the joint to resist transverse shear. If subsequent leakage occurs, repair can be made by replacing a portion or all of the grout with a sealant.
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