SHA_Utility_Patch_Details.pdf
PDF 115 KB Posted
- Attached to
- Large Valve Vault Replacement
- Solicitation number
- 107595
- Issued by
- Montgomery County, Maryland
About this file
This is a technical specification document for the State Highway Administration (SHA) detailing standard utility patch repair procedures for pavement openings in Maryland. The document, designated Standard No. MD 578.01 with approvals dated from 1986 to 2022, provides construction guidelines for repairing flexible and rigid pavement affected by utility trench work. The specifications address two primary pavement types: flexible pavement repairs utilizing approved asphalt mix with a minimum 2-inch surface course and base course matching existing thickness, and rigid pavement repairs using Portland cement concrete with a minimum 6-foot repair width. For all utility trench repairs, the top 1 foot must be filled with No. 57 aggregate completely wrapped in SE geotextile as directed by the engineer, with trenches extended to the ditch line. When trenches cross concrete roadways with joint installations, the entire slab between the trench edge and nearest joint must be removed if the distance is less than 6 feet.
All work must comply with SHA Sections 201, 505, and 522, with material conforming to Section 303 and CR-6 specifications. The contractor bears all costs for sawcuts, trench excavation, backfill, approved asphalt or concrete mix, geotextile wrapping, controlled low-strength material (CLSM) or gabion placement, curing, and associated labor and incidentals. Prior to concrete placement, edges of cuts and subbase materials must be cleaned and wetted. Repairs to Portland cement concrete pavement shall follow Standards 577.02, 577.03, 577.04, 577.05, 577.06, or 577.10, ensuring that patches utilize the same material type as removed from the roadway.
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Text version
PORTLAND CEMENT CONCRETE
NO. 57 AGGREGATE
APPROVED ASPHALT MIX
NOTES
GRADED AGGREGATE BASE
REPAIR WIDTH
6'-0"
BASE
WITH PORTLAND CEMENT CONCRETE BASE
2' 2'
REPAIR WIDTH
RIGID PAVEMENT
REPAIR WIDTH
6'-0" MIN.
6'-0" MIN.
APPROVED ASPHALT MIX PAVEMENT
2" MIN. APPROVED ASPHALT MIX SURFACE
FLEXIBLE PAVEMENT
OR AS SPECIFIED
MIN.
6"
OR AS SPECIFIED
MIN.
6"
SAME AS EXISTING.
ASPHALT MIX
DEPTH OF APPROVED
1'-0" MIN. OR AS SPECIFIED
OR AS SPECIFIED
18" MIN.
OR AS SPECIFIED
18" MIN.
1'-0" MIN. OR AS SPECIFIED
1'-0" MIN. OR AS SPECIFIED
SPECIFIED
OR AS
18" MIN.
SPECIFIED
OR AS
6" MIN.
THICKNESS OR AS SPECIFIED
MATCH EXISTING PAVEMENT
THICKNESS OR AS SPECIFIED
MATCH EXISTING PAVEMENT
THICKNESS OR AS SPECIFIED
MATCH EXISTING PAVEMENT
UTILITY TRENCHES
REPAIRING PAVEMENT OPENINGS FOR
MD 578.01
2-25-16
3-6-86
2-23-16
3-18-86
NO. 57 AGGREGATE SHALL BE COMPLETELY WRAPPED IN SE GEOTEXTILE AS DIRECTED BY THE ENGINEER.8.
CLSM - CONTROLLED LOW STRENGTH MATERIAL.7.
ITEMS.
AGGREGATE WRAPPED IN SE GEOTEXTILE, CLSM OR GAB, MATERIALS, TOOLS, LABOR AND INCIDENTALS SHALL BE INCLUDED IN THE PRICE OF THE UTILITY
ALL COSTS FOR SAWCUTS, TRENCH EXCAVATION, BACKFILL, APPROVED ASPHALT MIX, CONCRETE, MATERIAL CONFORMING TO SECTION 303, CR-6, NO. 57 6.
SPECIFICATIONS OR AS SPECIFIED IN THE PERMIT.
ALL WORK SUCH AS TRENCH BACKFILL, CURING OF CONCRETE, MATERIALS USED, ETC. SHALL BE IN ACCORDANCE WITH SECTIONS 201, 505 AND 522 OF THE 5.
SE GEOTEXTILE, CLSM OR GAB.
CLEAN AND WET EDGES OF CUT AND SUBBASE BEFORE PLACING CONCRETE. MATERIAL CONFORMING TO SECTION 303, CR-6, NO. 57 AGGREGATE WRAPPED IN 4.
NEAREST JOINT SHALL BE REMOVED IF THE DISTANCE IS LESS THAN 6 FT.
WHEREVER A TRENCH CROSSES A CONCRETE ROADWAY THAT HAS JOINT INSTALLATIONS THE ENTIRE SLAB BETWEEN THE EDGE OF THE TRENCH AND 3.
THE TOP 1 FT. OF THE TRENCH SHALL BE FILLED WITH NO. 57 AGGREGATE. TRENCH TO BE EXTENDED TO DITCH LINE.2.
577.04, 577.05, 577.06, OR 577.10.
UNLESS NOTED IN THE SPECIFICATIONS. PORTLAND CEMENT CONCRETE PAVEMENT REPAIR SHALL BE IN ACCORDANCE WITH STANDARDS 577.02, 577.03, THIS STANDARD IS TO BE USED IN ACCORDANCE WITH SECTIONS 505 AND 522. THE ROADWAY SHALL BE PATCHED WITH THE SAME TYPE MATERIAL REMOVED 1.
8-26-2210-06-22
STANDARD NO.
APPROVAL
SPECIFICATION
HIGHWAY ADMINISTRATION
APPROVAL
STANDARDS FOR HIGHWAYS AND INCIDENTAL STRUCTURES
CATEGORY CODE ITEMS
APPROVAL
APPROVAL
APPROVED
FEDERAL
REVISIONS
SHA
REVISED
REVISED
REVISED
REVISED
REVISED
REVISED
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