SURCHARGE
PART 1 GENERAL
1.1SECTION INCLUDES
A.Surcharge to mitigate long-term settlement of fill areas.
1.2RELATED SECTIONS
A.Section 02056: Embankment, Borrow, and Backfill
B.Section 02229: Temporary Retaining Walls
C.Section 02721: Untreated Base Course (UTBC)
1.3REFERENCES Not Used
1.4DEFINITIONS
A.Surcharge – Temporary fill used to reduce long-term settlement.
1.5SUBMITTALS
A.Target surcharge density and fill height for information.
B.Topographic survey data for review. Refer to Articles 1.6 and 3.1
1.Demonstrate complete placement of fill providing the full surcharge
height and extents shown.
1.6SETTLEMENT DURATION TIME
A.Settlement duration time begins when the full surcharge is in place as
verified by the Engineer.
Surcharge
PART 2 PRODUCTS
2.1MATERIALS
A.Surcharge Material
1.Granular borrow, embankment for bridge, UTBC, or borrow.
a.Refer to Sections 02056 and 02721 as applicable.
b.Meet the density requirements shown to provide the required
surcharge pressure.
PART 3 EXECUTION
3.1PLACEMENT AND MONITORING
A.Verify all geotechnical instrumentation is properly installed and operating.
B.Borrow may not be placed over embankment for bridge, granular borrow,
UTBC, MSE backfill, or free draining backfill.
C.Use a temporary retaining wall to construct and maintain slopes steeper
than 1.5H:1V. Refer to Section 02229.
D.Perform a spot check of the final surcharge surface in the presence of the
Engineer.
E.Perform a topographical survey of the final surcharge surface and submit
to the Engineer.
3.2RELEASE AND REMOVAL
A.Maintain surcharge in place until the Engineer has provided a written
surcharge release notification.
B.Meet material and compaction requirements for material left in place after
settlement is complete.
C.Regrade the material left in place to reestablish the design slopes and
grades after settlement where necessary.
END OF SECTION
Surcharge
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Source: 2027 Standard Specifications, 2027 Edition. View official source ↗