100 general provisions
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B. Adjustment to grade
604.04 Excavation and Backfill. Excavate to dimensions that provide ample room for construction. The Engineer will require the removal of unsuitable material below the structure bedding. Replace unsuitable material with Item 603 Structural Backfill. When the Engineer requires the removal and replacement of unsuitable material below the bedding for precast structures and below the structure for cast-in-place structures, the Department will provide compensation according to the Contract or by Supplemental Agreement. Ensure that the backfilling follows the completion of the work as closely as the type of construction will permit. Do not disturb the structure while backfilling. Backfill structures located within the pavement area with structural backfill to the subgrade according to Item 603, Type A or B conduit. Backfill structures outside of the pavement area according to Item 603, Type C conduit.
Take adequate precautions to prevent concrete and mortar from freezing. Do not set brick and masonry units having a temperature of 40 F (4 C) or less with mortar until heated. When required, heat to ensure that a temperature of 50 to 80 F (10 to 27 C) is obtained throughout the entire mass of the material. Cure the exposed surfaces of all brick and block masonry by covering with wet burlap for 48 hours or by applying curing membrane according to Item 511.
After placing the pipe, grout all openings between the pipe and structure less than 4 inches (100 mm) with mortar and grout all openings between the pipe and structure greater than 4 inches (100 mm) with nonshrink mortar. Seal all joints between modules with materials specified in Item 603 for Type A, B, C, D, or F conduit. Cure median inlets with the same materials and methods specified in 622.07. The manufacturer of precast modular items must be certified according to Supplement 1073. 604.07 Concrete (Cast-In-Place). Place and furnish structure concrete as shown on the plans. 604.08 Method of Measurement. The Department will measure Manholes, Inlets, Catch Basins, Monument Assemblies, Reference Monuments, Inspection Wells, Junction Chambers, and Precast Reinforced Concrete Outlets, whether new, reconstructed, or adjusted to grade, by the number of each type of structure complete and accepted. 604.09 Basis of Payment. The Department will pay for accepted quantities at the contract prices as follows: Item Unit Description 604 Each Manholes 604 Each Inlets 604 Each Catch Basins 604 Each Monument Assemblies 604 Each Reference Monuments 604 Each Right-of-Way Monuments 604 Each Inspection Wells 604 Each Junction Chambers 604 Each Manhole, Catch Basin or Inlet Reconstructed to Grade 604 Each Manhole, Catch Basin, Inlet, or Monument Box Adjusted to Grade 604 Each Precast Reinforced Concrete Outlet ITEM 605 UNDERDRAINS 605.01 Description 605.02 Materials 605.03 Pipe Underdrains Construction 605.04 Construction Underdrains 605.05 Prefabricated Edge Underdrains 605.06 Underdrain Outlets 605.07 Aggregate Drains 605.08 Method of Measurement 605.09 Basis of Payment 605.01 Description. This work consists of constructing unclassified pipe underdrains, shallow pipe underdrains, deep pipe underdrains, base pipe underdrains, or rock cut underdrains with or without a filter fabric, construction underdrains, prefabricated edge underdrains and aggregate drains. Use all suitable material in the work. Alternatively legally use, recycle, or dispose of all excavated material according to 105.16 and 105.17. 605.02 Materials. Concrete, Class C 499 and 511 Reinforcing steel 509.02 Filter fabric, Type A 712.09 Backfill unclassified pipe underdrains, shallow pipe underdrains, deep pipe underdrains, base pipe underdrains, or rock cut underdrains with or without a filter fabric, construction underdrains and aggregate drains with granular material consisting of No. 8, 9, or 89 size air-cooled blast furnace slag, limestone, or gravel. Use granular material with a maximum sodium sulfate soundness loss of 15 percent. Backfill prefabricated edge underdrains with granular material consisting of No. 8 size air-cooled blast furnace slag, limestone, or gravel. Use granular material with a maximum sodium sulfate soundness loss of 15 percent. For 605.02.A through 605.02.B, use the pipe of the same size and kind listed in the Proposal. If the kind of pipe is not specifically itemized in the Proposal, use types as listed below.
Corrugated polyethylene drainage tubing (perforated) 707.31 Polyvinyl chloride plastic pipe 707.41 Polyvinyl chloride corrugated smooth interior pipe (perforated per 707.31) 707.42 Polyvinyl chloride solid wall pipe (perforated per 707.31) 707.45
Perforated concrete pipe 706.06 Concrete drain tile, extra quality 706.07 Perforated vitrified clay pipe 706.08 Clay drain tile, extra quality 706.09 Corrugated steel underdrains, Type III 707.01 Corrugated polyethylene drainage tubing, (perforated) 707.31 Polyvinyl chloride plastic pipe 707.41 Corrugated aluminum alloy pipe and underdrains, Type III 707.21
6 inch (150 mm) Corrugated polyethylene drainage tubing (perforated) 707.31
Excavate trenches measured vertically from the subgrade to the bottom of the trench at a depth of 18 inches (450 mm) for base pipe underdrains, 30 inches (760 mm) for shallow pipe underdrains, and 50 inches (1270 mm) for deep pipe underdrains unless otherwise specified in the plans. Furnish a depth of 30 inches (760 mm) for construction underdrains unless otherwise specified in the plans. Excavate trenches for unclassified pipe underdrains to the depth specified in the plans. Excavate trenches to a depth of 6 inches (150 mm) below the rock, shale or coal depth required in 204.05 for Rock Cut underdrains unless otherwise specified in the plans. If underdrains are to be placed within or beneath an embankment, construct the embankment to the elevation of the top of the subgrade before trenching for the underdrain. If filter fabric is specified, line the underdrain trench with filter fabric. Place the filter fabric to completely surround the granular material. Overlap the filter fabric at the top of the trench. Match the overlap to the trench width. At other seams, overlap filter fabric a minimum of 12 inches (0.3 m).
Lay perforated underdrain so that the perforations are in the bottom half of the underdrain. C. Backfilling. Inspect the underdrains before placing any granular material. Place the granular material for the full width of the trench around the underdrain, and extend it to the bottom of the pavement or base as shown on the plans. If underdrains are placed outside of the pavement or base area, extend the granular material to within 4 inches (100 mm) of the finished grade. Fill the remaining depth of the trench with 203 embankment material. D. Protection. Place the pavement over the underdrain trench within 90 days after placing the trench backfill. If the trench remains open for longer than 90 days, remove and replace backfill contaminated by soil. 605.04 Construction Underdrains. Construct construction underdrains as follows: A. Excavation. Construct the trench width to at least 10 inches (250 mm) with a minimum of 2 inches (50 mm) on each side of the underdrain. Excavate the bottom of the trench to allow proper placing of the underdrain. Remove obstructions encountered while excavating for the underdrains. B. Trench Depth and Backfill. Construct the trench depth to that shown on the plans or 30 inches (750 mm). Backfill the trench with granular material for the full width of the trench and to the full height of the trench. C. Outlet. Outlet the construction underdrains as possible into the ditch or drainage structures. There is no change in pipe types for the outlet. D. Removal. Construction underdrains are not to be removed at any time. If the construction practice used requires the construction underdrains to be removed then install replacements as soon as possible. 605.05 Prefabricated Edge Underdrains. Install the prefabricated edge underdrains against the outside wall of a 4-inch (100 mm) trench, and backfill the trench adjacent to the pavement with granular material. Place the granular material in one or more lifts with a vibratory compactor run over the final lift to compact the granular material before placing the asphalt plug. Place the first layer of the granular material simultaneously with the trenching operation to hold the edge underdrains flush against the trench wall. Splice the prefabricated edge underdrains as required before placing in the trench, using material furnished by the manufacturer and according to the manufacturer’s directions. Require the manufacturer to furnish all material required for the splices, and furnish any equipment required for splicing. Construct splices to prevent separation of adjoining sections of the prefabricated edge underdrain panels. 605.06 Underdrain Outlets. Construct pipe outlets concurrently with underdrains. Provide all outlets on the slope with a precast reinforced concrete outlet according to Item 604 and a tied concrete block mat type 1 grouted according to 601.12. Construct the underdrains outlets according to Item 603 using outlet fittings. Require the manufacturer to supply outlet fittings that transition between the underdrains and the outlet pipe. Have the underdrains and outlets on fractured slab projects, such as crack and seat, rubblized, or break and seat projects, in place and functional before fracturing the existing pavement. Mark all underdrain outlets with a wooden lath prior to final seeding. Clean all debris from the outlets after final seeding.
The Department will measure Aggregate Drains by the number of feet (meters) completed and accepted in place, measured along the bottom of the trench. 605.09 Basis of Payment. The Department will pay for pipe outlets under 603 Conduit, Type F. The Department will pay for precast reinforced concrete outlets under 604 Precast Reinforced Concrete Outlet. The Department will pay for tied concrete block mats type 1 grouted under 601 Tied Concrete Block Mat. Rock Cut Underdrains are placed in rock and all required trenching in the rock is included under Rock Cut Underdrain. The Department will pay for accepted quantities at the contract prices as follows:
605 Foot (Meter) ____ " (____ mm) Unclassified Pipe Underdrains 605 Foot (Meter) 6" (150 mm) Construction Underdrains 707.31 605 Foot (Meter) ____ " (____ mm) Shallow Pipe Underdrains 605 Foot (Meter) ____ " (____ mm) Deep Pipe Underdrains 605 Foot (Meter) ____ " (____ mm) Base Pipe Underdrains 605 Foot (Meter) Aggregate Drains 605 Foot (Meter) ____ " (____ mm) Rock Cut Underdrains 605 Foot (Meter) ____ " (____ mm) Prefabricated Edge
Guardrail shall be deep beam rail Type 5, 5A, or 8. Appurtenances shall include bridge terminal assemblies, end terminals, and impact attenuators. Construction of the various types of guardrail include the furnishing, assembling, and erecting of all component parts and materials, complete in place, at the location shown on the plans or as directed, and according to the manufacturer’s recommendations where applicable. 606.02 Materials. Furnish materials conforming to: Concrete, Class C, F, or S 499 and 511 Reinforcing steel 509.02 Deep beam rail and hardware 710.06 Pressure treated guardrail posts and blockouts 710.14 Steel guardrail posts 710.15 Guardrail posts 710.16 Galvanizing 711.02
For guardrail, use deep beam rail Type 5, 5A, or 8. 606.03 Setting Posts. Set or drive posts plumb in a manner that prevents battering or distorting of posts. Trim posts that are set or driven more than 1-inch (25 mm) above grade. Treat trimmed posts with a preservative material specified in 712.06. Backfill post holes with acceptable material, placed in layers, and thoroughly compacted. Space Type 5 guardrail posts 6 feet, 3 inches (1.905 m) on center measured along the centerline of the rail and construct with blockouts. Construct each end of Type 5 guardrail barricades without blockouts and with a flared end section. Space Type 5A guardrail posts 3 feet, 1 1/2 inches (953 mm) on center measured along the centerline of the rail and construct with blockouts. Construct each end of Type 5A guardrail barricades without blockouts and with a flared end section. Space Type 8 guardrail posts 6 feet, 3 inches (1.905 m) on center measured along the centerline of the rail and construct with blockouts. 606.04 Erecting Rail Elements. Erect standard design (single-faced) guardrail of the type shown on the plans. Erect barrier design (double-faced) guardrail as shown on the plans. Erect rail elements in a manner resulting in a smooth, continuous installation. Use shop-curved rail on curves with radii from 5 to 70 feet (1.5 to 22.4 m). Except where otherwise required, such as expansion joint bolts, draw bolts tight. Tighten bolts through expansion joints as tight as possible without preventing the rail elements from sliding past one another longitudinally. Provide bolts long enough to extend at least 1/4 inch (6 mm) beyond the nuts. Do not use splice bolts that extend more than 1/2 inch (13 mm) beyond the nuts. For double-faced guardrail, provide bolts that extend from 1/4 to 1 inch (6 to 25 mm) beyond the nuts. Fabricate all metal in the shop. Do not perform burning or welding in the field. The Engineer may approve making holes in the field, but only for special details in exceptional cases. The Engineer may approve field punching, cutting, and drilling if the Contractor demonstrates that its methods do not damage the surrounding metal. Repair galvanized surfaces that have been abraded such that the base metal is exposed, including threaded portions of all fittings and fasteners, and cut ends of bolts as specified by ASTM A 780. Erect guardrail so that the bolts at expansion joints are located at the centers of the slotted holes. Splice the rail elements by lapping in the direction of traffic. Ensure that the plates at each splice make contact throughout the area of the splice.
For re-erecting, obtain the rail element from specified salvage sources. Furnish the following new materials: posts, blockouts, bolts, washers, and incidental hardware as necessary to complete the guardrail, except: (1) existing steel posts and blockouts that are not damaged and have a good galvanized coating may be reused, and (2) reuse guardrail splice bolts that are undamaged and were not removed during salvage may be reused. 606.06 Impact Attenuators. Before installing the attenuator, make all corresponding shop drawings from the manufacturer available for the Engineer’s inspection. Include installation drawings and instructions with the shop drawings that completely describe the attenuator system. Grade the top of each foundation at the same elevation as the adjacent travel lane and/or paved shoulder. Adjust the location of the anchors to avoid pavement joints.
The Department will measure Anchor Assembly of the type specified by the number each assembly furnished and erected complete. The Department will measure Bridge Terminal Assembly of the type specified by the number of each assembly furnished and erected complete. The Department will measure Impact Attenuator of the type specified by the number of each furnished and erected complete. The Department will measure Guardrail Post of the kind specified by the number of each furnished and erected.
For the extra costs associated with furnishing and installing extra-length posts in lieu of standard-length guardrail posts, payment for 9-foot (2.75 m) guardrail posts is considered full compensation. The Department will pay for accepted quantities at the contract prices as follows:
606 Foot (Meter) Guardrail, Type ___ 606 Foot (Meter) Guardrail, Barrier Design, Type ___ 606 Foot (Meter) Guardrail, Rebuilt, Type ___ 606 Each Anchor Assembly, Type ___ 606 Each Anchor Assembly, Type ___, Barrier Design 606 Each Bridge Terminal Assembly, Type ___ 606 Each Impact Attenuator, Type ___ 606 Each Guardrail Post, 8-foot (2.44 m) 606 Each Guardrail Post, 9-foot (2.75 m)
Fence is designated by the following types: A. Type 47 [47-inch (1195 mm)] woven wire fence fabric with steel line posts. B. Type 47RA [47-inch (1195 mm)] woven wire fence fabric with wood line posts. C. Type CL [60-inch (1525 mm)] chain-link fence fabric with top rail. D. Type CLT [60-inch (1525 mm)] chain-link fence fabric with tension wire. 607.02 Materials. Furnish materials conforming to: Concrete, Class C, F, or S 499 and 511 Reinforcing steel 509.02 Barbed wire 710.01 Woven steel wire fence 710.02 Chain-link fence 710.03 Fence posts, braces, and dimension lumber 710.11 Steel line posts and ties, Type 47 fence 710.11 Expansion shield anchors, self drilling 712.01 Yüklə 7,65 Mb. Dostları ilə paylaş:
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