| 1. |
Drill a plumb vertical shaft, at the location specified for the required foundation as indicated on the construction drawings. The diameter of the completed shaft shall be no greater than the outside diameter of the foundation pipe to be installed (field verify). Advance the shaft a minimum of two (2) feet deeper than the designed bottom of foundation depth. Record the soil type and classification on the MFPF installation report. |
| 2. |
Immediately after the drilled shaft is complete, place a centering collar in the shaft and lower the primary installation anchor through the collar into the shaft. Place hydraulic cylinders over the anchor rod, on top of the anchor housing and lock into place with the upper lock nut. Expand the hydraulic cylinders to the maximum required rod extension or hydraulic pressure for the installation anchor in use. It is extremely critical to field monitor the cylinder stroke length to ensure that the anchor rod is not overextended. Secure the lower lock nut against the anchor housing. Relax and remove the hydraulic cylinders and the centering collar. Record the anchor installation pressure on the MFPF installation report. |
| 3. |
By adding segments, extend the high strength anchor rod to accommodate the total length of the foundation (plus two (2) inches) and the hydraulic cylinders. Place the foundation into position over the installation anchor. Foundation fin orientation must conform to the construction drawings. Position hydraulics on top of the foundation and secure to the anchor rod with the lock nut. Check and adjust orientation, alignment, plumbness and level of the foundation before the first stroke of the cylinders. |
| 4. |
Expand the hydraulic cylinders in order to press the foundation into the earth. This may require several strokes of the cylinders to reach the required elevation. Record the foundation number as well as the installation force in PSI & Tons for each foot of depth below the ground surface on the MFPF installation report. Verify that the final recorded installation pressure meets or exceeds the design injection load. |
| 5. |
Release the anchor lock nut, remove the hydraulics and drop the anchor expanding cone below the anchor plates by driving down the anchor rod. Withdraw the installing anchor through the foundation column. Fill the foundation column using the material that was removed during the drilling operation or as required by the contract documents. Consolidate the back-fill material sufficiently to achieve a stable condition. |
| 6. |
When additional resistance is required to install the foundation, install one pair of satellite anchors aligned on each side of the primary anchor or, if necessary, two pair of satellite anchors aligned perpendicular to each other at the centerline of the primary anchor. The center to center distance between satellite anchors in a pair shall be eleven (11) feet. Install satellite anchors in the same manner as the primary anchor. Record the installation pressure for each satellite anchor on the MFPF installation report. Attach the anchors to the spreader beams positioned above the hydraulic cylinders. Expand the cylinders against the beams utilizing the resistance of the primary and the satellite anchors to install the foundation to the required elevation. |
| 7. |
Remove the spreader beams and hydraulics. Collapse and remove the primary and satellite anchors as in item 5 above. Back fill the anchor shafts and the foundation column using the material that was removed during the drilling operation or as required by the contract documents. Consolidate the back-fill material sufficiently to achieve a stable condition. |
| 8. |
The structure may be erected immediately after the foundation is installed and approved by the Inspector. Use the bolts or studs, washers, lock washers and nuts as specified and/or shown on the approved contract drawings. |
| 9. |
Contact the engineer if rock or obstructions are encountered above the foundation design tip elevation or if actual soil conditions differ from those utilized in the foundation design criteria. |
