stressing length of anchor, grout mix, grouting pressure, bags of
cement injected, [and] a report of performance test or proof test
[and extended creep test] results, [and hole alignment surveys].
The performance test, proof test [and extended creep test] results
shall include measured lengths of drill holes and anchors, the
loads and elongations recorded during testing, monitoring and
stressing of the anchors, and graphs of test results.
1.5
SYSTEM DESCRIPTION
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NOTE: This guide specification may be used as a
performance specification or a prescriptive
specification by use of tailoring options. For the
performance specification tailoring option, the
Government provides the design loads, locations,
minimum unbonded length, minimum bond lengths, soil-
or rock-grout bond strength, corrosion protection
requirements, and limitations on anchor inclination.
The Contractor is then responsible for selecting
the type of anchor and designing the anchor system
to conform with the prescribed design criteria. In
order to use the performance specification,
sufficient foundation information must be given to
permit the Contractor to accurately estimate the
design and installation costs.For the prescriptive
specification tailoring option, the design of the
anchors must be completely shown on the drawings and
must include location, design load, unbonded and
bonded length, drilling and grouting method, drill
hole size, corrosion protection, and anchor
inclination.
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1.5.1
Scope of work
The work includes design, fabrication and installation of the [soil] [rock]
anchor system. The design of the [soil] [rock] anchor system shall be
provided by the Contractor and shall be completely the Contractor's
responsibility. General design criteria are [shown on the drawings] [given
in paragraph Design Requirements]. The materials, design, stressing, load
testing, and acceptance shall be in accordance with PTI 4 and these
specifications. [Soil] [Rock] anchors may be threaded bar or strand type.
The Contractor shall be responsible for the design of the anchor and
bearing plate, [determining top of rock], determining drilling methods, and
determining hole diameter and bond length. The complete design, including
design computations, fabrication and installation drawings and installation
plan, shall be certified by a registered Professional Engineer and shall be
submitted to the Contracting Officer for approval. Approval of the design
by the Contracting Officer shall not relieve the Contractor of
responsibility for design and performance of the [soil] [rock] anchors.
[Payment for rock anchors, as specified in Section 01270A MEASUREMENT AND
PAYMENT, shall include all costs in connection with designing, fabricating,
and installing the anchors.]
1.5.2
Anchor Design
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NOTE: The following information must be provided to
SECTION 02490
Page 17
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