| 摘要 |
A device according to the invention is characterised in that it comprises a driving-in member 31 substantially in the shape of a half-disc for forming trenches T by moving in translation in the ground, and a filling member consisting of a fork 32 with two prongs (32A, 32B) which, by moving in translation on either side of the trench T, is capable of filling in the latter after insertion of a joint J, before compaction. <IMAGE>
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