| 摘要 |
A grout bag assembly (1) is provided comprising an inflatable grout bag ( 2) (hereinafter termed a primary inflatable grout bag) having a top (4), bot tom (6) and at least one side (8) and having in an expanded condition an axi s extending between the top and bottom thereof. A secondary, independently i nflatable, grout bag (14) expandable in the same direction as the primary in flatable bag is attached to one end of the primary inflatable grout bag. The secondary grout bag is employed, in use, subsequent to be installation of t he primary grout bag to compensate for shrinkage in the height of the primar y grout bag and to thereby supplement the overall axial dimension of the gro ut bag assembly, in use.
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