Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: AASHTO HB-17 DIVISION II SEC 1:2002
• Năm ban hành / Publication date: 2002
• Tình trạng / Status: A - Còn hiệu lực
• Tên tiếng Anh / Title in English: Division II Construction - Structure Excavation and Backfill
• Thay thế cho / Replace: AASHTO DIVISION II SEC 1:1996
• Số trang / Page: 3

Phạm vi áp dụng / Scope of standard

GENERAL

Structure excavation shall consist of the removal of all
material, of whatever nature, necessary for the construction of
foundations for bridges, retaining walls, and other major
structures in accordance with the plans or as directed by the
Engineer.

If not otherwise provided for in the contract, structure
excavation shall include the furnishing of all necessary equipment
and the construction and subsequent removal of all cofferdams,
shoring, and water control systems which may be necessary for the
execution of the work.

It shall also include, if not otherwise specified, the placement
of all necessary backfill, including any necessary stockpiling of
excavated material which is to be used in backfill, and the
disposing of excavated material, which is not required for
backfill, in roadway embankments or as provided for excess and
unsuitable material in Subsection 203.02, AASHTO Guide
SpeciJications for Highway Construction.

If the contract does not include a separate pay item or items
for such work, structure excavation shall include all necessary
clearing and grubbing and the removal of existing structures within
the area to be excavated.

Classification, if any, of excavation will be indicated on the
plans and set forth in the proposal.

The removal and disposal of buried natural or manmade objects
are included in the class of excavation in which they are located,
unless such removal and disposal are included in other items of
work. However, in the case of a buried manmade object, if (I) its
removal requires the use of methods or equipment not used for other
excavation on the project, (2) its presence was not indicated on
the plans or in the special provisions, (3) its presence could not
have been ascertained by site investigation, including contact with
identified utilities within the area, and (4) the Contractor so
requests in writing prior to its removal, the removal and disposal
of such object will be paid for as extra work, and its volume will
not be included in the measured quantity of excavation.