| 摘要 |
PCT No. PCT/FR79/00028 Sec. 371 Date Nov. 30, 1979 Sec. 102(e) Date Nov. 30, 1979 PCT Filed Mar. 29, 1979 PCT Pub. No. WO79/00859 PCT Pub. Date Nov. 1, 1979. The invention relates to a process and apparatus for the boring of sites. The tool comprises a container 6 reinforced by a beam 10 assuring the coupling with the drive system 2 and ending in an opening door 28. The container defines an interior volume for the collection of the debris. The lateral knives 50 associated with the openings provided with a gate 53 assures the formation of the excavation. The container 6 is equipped to the exterior with a helix 60 making possible to control the displacement of liquids in the space provided between the container 6 and the bore. The invention relates particularly to boring tools used in the presence of liquids.
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