STRUCTURAL EXCAVATION AND BACKFILL
PART 1 GENERAL
1.1SECTION INCLUDES
A.Excavation for and backfilling of bridges, foundations, box culverts, pipe
culverts, drains, and other structures.
1.2RELATED SECTIONS
A.Section 02056: Embankment, Borrow, and Backfill
1.3REFERENCES
A.AASHTO LRFD Bridge Construction Specifications
1.4DEFINITIONS NOT USED
1.5SUBMITTALS
A.Drawings for Temporary Works, for review.
1.Includes shoring, bracing, and cofferdams.
PART 2 PRODUCTS
2.1BACKFILL FOR STRUCTURES
A.Embankment Material. Refer to Section 02056.
2.2DRAINAGE PIPE BACKFILL
A.Refer to Section 02056.
PART 3 EXECUTION
3.1PREPARATION
A.Design and construct temporary works according to AASHTO LRFD
Bridge Construction Specifications, Section 3 (Temporary Works).
Structural Excavation and Backfill
B.Provide a cofferdam for underwater work.
1.Remove all cofferdams, sheeting, and bracing when no longer
needed.
3.2EXCAVATION
A.Structural excavation includes:
1.Excavating for structure foundations.
2.Control and removal of water.
a.Dewater the excavation if ground water is encountered.
b.Continue dewatering activities as necessary to prevent
damage to the work.
3.Installation and removal of facilities required to complete the work
unless specified or allowed to remain in place.
B.Excavate rock and other hard strata to elevations and dimensions shown.
1.Clean and cut to a firm surface as shown.
a.Foundation cannot contain loose material.
2.Clean out seams and fill with concrete, mortar, or grout.
C.Over-excavate and waste unsuitable material for the structure foundation
to at least 1 ft below the elevation shown when directed by the Engineer.
1.Cost of over-excavation is paid as extra work when directed by the
Engineer.
D.Clean the areas in and near channels which were affected by operations,
to prevent scour and waterborne debris.
E.Dispose of all unused excavation material.
3.3BACKFILL AND COMPACTION
A.Backfill and compact excavated spaces not occupied by abutments,
foundations, and other permanent work as described. Refer to Section 02056.
1.Backfill to the surface of the surrounding ground, with a sufficient
allowance for settlement.
2.Bring backfill up uniformly on all sides of structures.
END OF SECTION
Structural Excavation and Backfill
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Source: Utah Standard Specifications for Road and Bridge Construction, 2026 Edition. Pages 278–279 of 1,331. View official source ↗