KSE DCP K-100, Руководство пользователя

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12
PROCEDURES
3.6.4 Magnetic Ruler (Figure 7)- The optional Magnetic
Ruler is a battery-operated AAA (Qty. 6), data-collection
device for the Dynamic Cone Penetrometer (DCP). It
displays depth, blows, mm/blow, cumulative mm/blow , and
cumulative blow/inch in SI and English. The correlations
are CBR (California bearing ratio) in %; Bearing capacity
in Kips per square foot, and unconfined compression test
in %. A flash drive records the data, information entered
by the operator, and date and time for each test via a
waterproof USB port.
3.7 Data Recording
A form like the one shown in Figure 8 is suggested for data
recording. The recorder enters the header information
before the test.
(1) The actual test data is recorded in column 1
(Number of Blows) and column 2 (Cumulative Penetration
in mm); if the moisture content is available, it is entered in
column 8.
(2) When testing a subsurface layer through a
drilled or cored access hole, the first reading corresponds
to the referenced reading at the top of the layer to be
tested.
(3) The number of blows between readings may
be varied depending on the resistance of the material.
Normally readings will be taken approximately every 50
mm (2”), i.e. 1 blow for soft material, 5 blows for “nor-
mal” materials and 10 blows for very resistive materials.
(4) The tip should be advanced a minimum of 25
mm (1.0 in) between readings. The penetration to the
nearest 1 mm (0.04 in) corresponding to the specific num-
ber of blows is recorded. A reading is taken immediately
when the material properties or rate of advance change
significantly.