each anchor, a record shall be kept of gage pressure and of anchor
elongation at each stage of stressing to the Test Load required by PTI 4.
Measurements of the elongation of prestressing steel shall be made in
accordance with PTI 4. If the total movement at the end of 10 minutes at
the Test Load exceeds 1 mm 0.040 inch, the Test Load shall be held an
additional 50 minutes and the movement readings shall be taken at the
interval specified in PTI 4, Paragraph 8.3.3. Test records, including
plots and graphical analysis of test data, shall be furnished upon
acceptance of each proof tested anchor in accordance with paragraph
SUBMITTALS. The proof test results shall be compared with similar anchors
in which performance tests have been performed. If any significant
variation from the proof tests occurs, the Contracting Officer may require
additional performance tests.
3.5.4
Supplementary Extended Creep Test
**************************************************************************
NOTE: Rock anchors installed in competent rock
normally do not exhibit time-dependent movement and
do not require extended creep test. However,
decomposed or weak argillaceous rock may exhibit
creep, and extended creep test should be
considered.At least 2 extended creep tests should be
performed on permanent anchors in soils with a
Plasticity Index greater than 20.
**************************************************************************
Where specified, anchors shall have an extended creep test performed.
Creep test shall consist of cyclically and incrementally loading and
unloading the anchor, and shall be conducted in accordance with PTI 4,
Paragraph 8.3.4. Each maximum load shall be held in accordance with PTI A,
Table 8.3.4. A plot of each family of creep curves shall be submitted
along with the recorded readings taken at time of the test.
3.5.5
Driller Logs
**************************************************************************
NOTE: This paragraph should be used when a record
of the drilling is desired for verification of
design assumptions or to document the actual
conditions encountered. The list of information
must be edited to reflect the work involved (rock or
soil anchor, core drilling, drilling methods, etc.
This paragraph includes a reference to DRILLING LOG,
ENG FORM 1836 and 1836A. The forms, or appropriate
local equivalent, must be added by the specifier.
**************************************************************************
The Contractor shall keep accurate driller logs and records of all work
accomplished under this contract and shall deliver complete, legible copies
of these logs and records to the Contracting Officer upon completion of the
work or at such other time or times as he may be directed. All such
records shall be preserved in good condition and order by the Contractor
until they are delivered and accepted, and the Contracting Officer shall
have the right to examine such records at any time prior to their delivery.
Separate logs shall be made for each hole. The Contractor shall use
DRILLING LOG, ENG FORM 1836 and 1836A [or other approved form which
provides the required information] for his logs. The following information
SECTION 02490
Page 39
Previous Page
