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| 3D MONITORING | GEOKON
X-AXIS
The X-axis, as shown above, uses a 1/4" x 3/4" stainless steel bar to transfer
parallel motion along the axis of the crack. This sensor requires two holes about
32 mm (1.25") apart, both 10 mm (3/8") in diameter and 32 mm deep. The holes
must be perpendicular to the crack, and about an inch or two away. Once the
anchors are installed with the spacers on top, attach the 5-5/8" long stainless
steel bar using the provided threaded rods, lock washers, and nuts.
Note:
The spacers used here are 1/8" shorter to accept the width of the bar. The
spacing, chosen from Table 1 in Section 2.2.1, is then measured perpendicular
from the 1/4-20 tapped hole in the stainless steel bar. Install another expansion
anchor and spacer at this location, then attach the crackmeter with rod end
bearings using the threaded rod, lock washer, and nuts provided.
Perform the following installation steps:
1.
Using a masonry drill (or other suitable equipment), drill two 3/8 inch (10
mm) diameter holes, 1.25" (32 mm) deep, 1.25" apart. The holes should be
positioned perpendicular to, and one-two inches in from, the crack.
2.
Insert an expansion anchor into each of the holes, slotted end down.
3.
Insert the provided setting tool, small end first, into the anchors. Expand
each anchor by hitting the large end of the setting tool with several sharp
hammer blows.
4.
Remove the PVC slotted sleeve or dowel pin securing the transducer shaft.
5.
Place the spacers on top of the anchors and attach the 5.625" long stainless
steel bar to the anchors using the provided threaded rods, lock washers,
and nuts.
Note:
The spacers used here are 1/8" (3.2 mm) shorter than the others to
accommodate the width of the bar.
6.
Drill another 3/8" (10 mm) diameter, 1.25" (32 mm) deep holes, one directly
below the 1/4-20 tapped hole in the stainless steel bar.
7.
Using the spacing from Table 1 in Section 2.2.1, make another 3/8" (10 mm)
diameter, 1.25" (32 mm) deep hole perpendicular from the one made in the
previous step.
8.
Insert expansion anchors into the holes created in steps five and six with the
slotted ends down.
9.
Place the spacers on top of the anchors and attach the crackmeter that has
rod end bearings to the anchors using the threaded rod, lock washer, and
nuts provided.
Y-AXIS
The Y-axis monitors any movement perpendicular to the crack. It is mounted the
same way in as the standard crackmeter installation, referenced in Section 2.2.4,
with 3/8" diameter x 1 1/4" deep holes on each side of the crack, and at a
spacing chosen from Table 1 in Section 2.2.1. Custom spacers are provided to
be installed between the expansion anchors and the rod end bearings.
Perform the following installation steps:
1.
Determine the proper setting distance using Table 1 in Section 2.2.1.
2.
Using a masonry drill (or other suitable equipment), drill two 3/8 inch (10
mm) diameter holes, 1.25" (32 mm) deep at the proper locations.
3.
Insert the expansion anchors into the holes, slotted end down.