May_1970 — Page 38

Pakt-in-Place® Piles

獎

Earth-filled auger acts as packer to con- tain pressure in hole and force mortar to intrude surrounding soil.

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DILINA

Annular grooves and typically rough surface of these excavated Pakt-in-Place piles leave no doubt as to their excellent skin friction qualities.

For unstable soils, Intrusion-Prepakt has originated and perfected a pressurized cast-in-place design known as the Pakt-in-Place pile. The installation of this unique pile requires no casing. Rather, it permits intimate contact between soil and concrete in developing maximum possible skin friction values. This has been demonstrated repeatedly both by observation of excavated test piles (see photo, upper right) and by direct comparison of load test data on Pakt-in-Place piles versus conventionally-driven cased piles. This means that greater loads can be supported at shallower depths-with a consequent saving to clients in time and money.

I-P's procedure for installing Pakt-in-Place piles is similar to that for Cast-in-Place. The operational difference is the method of introducing Intrusion mortar into the augered hole. Flexible grout lines are connected to the top of the auger flight. Intrusion motar is pumped through the auger shaft to fill the hole as the auger is being withdrawn. The earth- filled auger acts as a pressure packer to force the fluid mortar deep into sub-strata fissures. Where weak soil zones are encountered, the mortar pressure expands the pile cross section, thus consolidating the sur- rounding area.

Pakt-in-Place piles may be placed to the same depth as Cast-in-Place. Diameters of 13 to 19 inches are sufficient for normal applications. Pakt-in-Place piles may be placed indoors or out, by custom-built equip- ment suited to the particular job-all without vibration-without casing.

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INTRUSION PREPAKT

Foundation Contractors, 725, Prince's Building, Hong Kong. Tel: 232181

Far East BUILDER, May 1970