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US 4,696,607 AGranted
Slurry trench method and apparatus for constructing underground walls
AssigneeFinic, B.V.
InventorArturo L. Ressi di Cervia
Life of this patent
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AssigneeFinic, B.V.
InventorArturo L. Ressi di Cervia
Estimating the term…
A system for constructing narrow underground walls utilizing the slurry trench method is disclosed wherein a first apparatus excavates from one end of a slurry filled trench and a second apparatus is utilized for filling the trench with a wall forming material and at least a part of the excavating and/or filling apparatus is floated on the slurry in the trench. In one disclosed embodiment, narrow cut-off walls are formed by excavating from one end of a slurry filled trench and backfilling the trench at the opposite end by depositing therein a mixture of excavated soil and bentonite slurry from the trench, and includes a relatively large float adapted to be immersed in the slurry to prevent loading on the trench walls and stabilizing the apparatus for excavating purposes. In a further embodiment, in combination with a float-fin, low pressure tires or crawler treads bear a portion of the load and the distribution between the float and the ground engaging apparatus is accomplished by adjusting the bouyancy of the float, and the bouyancy of the float being adjusted by admitting or removing slurry or other liquid from the interior of the float.
In a system for constructing a narrow underground wall, said system including a first apparatus for excavating from one end of a slurry filled trench and a second apparatus for filling the trench with a wall forming material, the improvement comprising floatation means and wherein at least a part of said first apparatus is floated at the surface of the slurry in said trench on said floatation means.
In an apparatus for forming a narrow cutoff wall having means for excavating soil from one end of a long, slurry filled trench and backfilling the trench at the opposite end by depositing therein a mixture of the excavated soil and slurry from the trench, the improvement comprising ground engaging traction means straddling said trench, said ground engaging traction means including float means in said slurry for at least in part supporting said apparatus on said slurry in said trench and in part on said ground engaging traction means.
In a slurry trench method of making a narrow cutoff wall wherein a trench is excavated in the presence of a liquid s1urry and said cutoff wall is formed by a mixture of excavated soil and slurry, said mixture being prepared by mixing machinery which is located outside the trench, and backfilling the trench with the prepared mixture, the improvement comprising partially floating said mixing machinery on the slurry in the trench in advance of the backfill placed in the trench.
A method of reducing the width of a working platform along the line of a slurry trench comprising floating at least a portion of the slurry trench machinery on the slurry in the trench and supporting the remainder on said working platform adjacent said slurry trench.
Slurry trench excavating apparatus having means for excavating soil from one end of a narrow slurry filled trench, the improvement comprising,
Dependencies are inferred from the claim text.