2. Contractor shall use extra care when compacting adjacent to pipes and
drainage structures. Backfill and compaction shali proceed along sides of
drainage structures so that the difference in top of fill level on any side of the
structure shall not exceed two feet (2') at any stage of construction.
B. TRENCHES:
1.
we
Bedding as detailed and specified shall be furnished and installed beneath the
pipeline prior to placement of the pipeline. A minimum bedding thickness shall
be maintained between the pipe and undisturbed material, as shown on the
Drawings.
3.03 BACKFILL PLACEMENT AND COMPACTION:
A. GENERAL:
1.
2.
material shall first be placed to a height of at least 12-inches above the top of
the pipe before excavation.
Pipe trenches shall be made as narrow as practicable and shall not be widened
by scraping or loosening materials from the sides. Every effort shall be made
to keep the sides of the trenches firm and undisturbed until backfilling has
been completed.
3.02 EXCAVATION:
A. GENERAL:
1.
2.
PART 2 - PRODUCTS
2.01 MATERIAL:
A.
C.
CRUSHED GRAVEL:
The Gravel Road Base will be NHDOT - Item 304.3 Crushed Gravel, or Item
304.4 Crushed Stone (Fine Gradation).
TRENCH BACKFILL MATERIALS:
1.04
1.05
1.06
1.07
SUBMITTALS: IN ACCORDANCE WITH REQUIREMENTS OF GENERAL
SPECIFICATIONS, SUBMIT THE FOLLOWING:
Material test results performed by a certified laboratory shall be submitted to the
Engineer for all materials proposed for use on the project. If required by the Engineer,
samples shall be submitted for independent testing.
PROTECTION OF EXISTING PROPERTY:
SECTION 02300
EARTHWORK
PART 1 - GENERAL
1.01
1.02
mo Oo PP PS
7
1.03
WORK INCLUDED:
The Contractor shall make excavations of normal depth in earth for trenches and structures,
shall backfill and compact such excavations to the extent necessary, shall furnish the
necessary material and construct embankments and fills, and shall make miscellaneous
earth excavations and do miscellaneous grading.
RELATED WORK:
Section 01110, CONTROL OF WORK AND MATERIALS
PART 3 —EXECUTION
3.01 INSTALLATION:
A. Work shall not be started until all materials and equipment necessary for their construction are
either on the site of the work or satisfactorily available for immediate use as required.
B. _ The sheeting shall be securely and satisfactorily braced to withstand all pressures to which it
may be subjected and be sufficiently tight to minimize lowering of the groundwater level
outside the excavation.
SECTION 02252
SUPPORT OF EXCAVATION
PART 1 - GENERAL
1.01 WORK INCLUDED:
A. This section of the specification covers sheeting and bracing for support of
excavations. The requirements of this section shall also apply, as appropriate, to other
methods of excavation support and underpinning which the Contractor elects to use to
complete the work.
