524.01 Description.
materials necessary to provide the completely functional bridge end joints systems (armor plates, anchor bolts, extrusions, channels, seal elements, etc., except the lubricant -adhesive used to install the seal element) for the structure, for the partial installation of the seal systems (that portion of the seal systems required to be installed in the bridge decks), and for all equipment, tools, labor, and incidentals necessary to complete this item of work.
6.Item 522- G. The accepted bridge joint seal, measured as noted above, will be paid for at the contract price bid per linear foot which shall be full compensation materials, equipment, tools, labor and incidentals necessary to furnish and install the seals.
b.Payment will be made under Item No .: 522-A Furnishing and Installing Bridge (Interior o r End) Joint Seal System ___ inch {mm} Total Joint Movement - per linear foot {meter} 522-B Furnishing and Partial Installation of Bridge End Joint Seal System ___ inch {mm} Total Joint Movement - per linear foot {meter} 522-C Partial Installation of Br idge End Joint Seal System - per linear foot {meter} 522-D Furnishing and Installing Bridge (Interior or End) Joint Seal Systems, Station ______ - per lump sum 522-E Furnishing and Partial Installation of Bridge End Joint Seal Systems, Station ______ - per lump sum 522-G Bridge Joint Seal - per linear foot {meter} REINFORCED CONCRETE BOX CULVERTS
524.01 Description.
This Section shall cover the work of constructing reinforced concrete box culverts i n accordance with the details shown on the plans. The Contractor shall have the option of constructing either cast-in-place or precast concrete culverts if the required type of culvert is not shown on the plans.
524.02 Materials.
a.Applicable Sections . The requirements given in the following Sections shall be applicable (unless modified by the requirements given in this Section) to the construction of box culverts. Section 214, Structure Excavation and Backfill for Drainage Structures and Minor Structure s Section 501, Structural Portland Cement Concrete Section 502, Steel Reinforcement Section 831, Precast Concrete Products
b.Concrete for Culverts Cast in Place . Concrete for cast in place culverts shall be Class B concrete .
c.Joint Sealers for Precast Concrete Culverts . Joint sealer shall be one of the types meeting the requirements given in Article 846.01, unless shown otherwise on the plans.
524.03 Construction Requirements.
a.Excavation, Backfilling and Water Quality Protection .
1.Excavation an d Backfilling . Excavation and backfilling shall be in accordance with the requirements given in Section 214. In addition to the requirements given in Section 214, precast concrete culverts shall be placed on a bedding layer of backfill. The requirement fo r a bedding layer will be met if extra depth excavation and backfill is required. If extra depth excavation and backfill is not required, the bedding layer shall be a minimum compacted thickness of 4 inches {100 mm} of foundation backfill placed at least 2 feet {600 mm} wider than the extent of the outside walls (1 foot {300 mm} on each side of the culvert).
524.03 Construction Requirements.
2.Water Quality Protection . The Contractor shall be fully responsible for protecting the quality of the water at the site of the culvert by preventing erosion and by capturing and removing sediment at diversion channels and cofferdams. Unless otherwise shown on the plans, provisions for water quality protection at the culvert site shall be designed and implemented by the Contractor. Details of these pro visions shall be included in the Stormwater Management Plan.
b.Type of Required Culvert . The type (either cast in place or precast) of required culvert may be shown in the pay item descriptions for the culvert construction. The Contractor shall cons truct that type of culvert if the type designation is shown. The Contractor shall have the option of constructing either cast -in-place or precast concrete culverts if the required type of culvert is not shown in the pay item description.
c.Preparation for Culvert Extension. The extension of a culvert shall include the cutting or breaking away of portions of the existing culvert and the preparation of the exposed structural material for joining with the new culvert materials.
d.Culverts Constructed with Cast in Place Concrete .
1.Sequence of Concrete Placement for Slabs and Walls . Concrete for the bottom slab shall be placed and allowed to set before the placement of concrete for the walls and top slab. The walls and top slab in culverts that have an overall height of 8 feet {2400 mm} or less may be constructed with a continuous pl acement of concrete. The walls and top slab in culverts that have an overall height greater than 8 feet {2400 mm} shall be constructed by separate placements of concrete. When the walls and top slab are constructed by separate placements of concrete, the concrete in the walls shall be strong enough to allow the placement of the concrete without damage to the walls.
2.Preparation of Construction Joints . All construction joints shall be thoroughly cleaned of all debris. The concrete surface shall be carefu lly chipped and roughened in accordance with the method of bonding construction joints given in Section 501.
3.Required Construction Joints. Construction joints shall be provided on all culverts over 60 feet {18 m} in length with the spacing of the joints set to provide approximately equal length sections along the culvert. One construction joint will be required for culvert lengths between 60 feet {18 m} and 90 feet {27 m}. Two construction joints will be required for culvert lengths greater than 90 feet {27 m} and less than 135 feet {41 m}. Three construction joints will be required for culverts from 136 feet {41 m} to 170 feet {52 m} in length. For culverts over 170 feet {52 m} in length, construction joints shall be spaced at approximately equal interva ls of not less than 40 feet {12 m} nor more than 55 feet {17 m}. All required construction joints shall be constructed normal to the center line of the culvert.
4.Tolerances . The height and width of the openings shall not vary by more than 1 % from the pl an dimensions. The slabs and walls shall not be thinner than the plan dimensions, but may be thicker by 5 % more than the plan dimensions. The interior surfaces shall not vary by more than 1/4 of an inch {6 mm} from a 10 foot {3 m} straightedge placed a nywhere on any interior surface. The clearance of the reinforcing steel shall not be less than the plan clearance and shall not be greater than 3/8 of an inch {9 mm} more than the required plan clearance.
e.Culverts Constructed with Precast Concrete Uni ts.
1.Standard Details for Precast Concrete Culverts . For culverts with more than 2 feet {600 mm} of cover the precast units shall be manufactured in accordance with the details given in AASHTO M 259 {M 259M} "Precast Reinforced Concrete Box Sections for Culverts, Storm Drains, and Sewers". For culverts with less than 2 feet {600 mm} of cover the precast units shall be manufactured in accordance with the details given in AASHTO M 273 {M 273M} "Precast Reinforced Concrete Box
524.04 Method of Measurement.
Sections for Culverts, Storm Drains, and Sewers with Less Than 2 feet {600 mm} of Cover Subjected to Highway Loading". Each precast unit shall be a one piece design cast as a monolithic unit.
2.Submittal of Details . Details and design calculations, sealed by a Licensed Professional En gineer, shall be submitted as Shop Drawings in accordance with all of the requirements given in Article 105.02 when the conditions of loading differ from what is given in ASTM C 1577. Details and design drawings shall be submitted as Working Drawings for a ll pipe entrances, connections to drainage structures, bends in culvert alignment, wingwalls, aprons and guardrail attachment.
3.Transition for Extending Culverts . A uniform transition shall be constructed where new or existing cast in place culverts are extended with precast units. A doweled or tongue and groove connection shall be provided at the junction of the precast unit and the cast in place section. Details and design calculations for the transition shall be submitted in accordance with the requi rements given in Article 105.02 for the submittal of Working Drawings.
4.Installation and Connection of Precast Units. Precast units shall be laid to the same line and grade requirements noted in Item 530.03(a)2. for pipe. The units shall be connected so that there are no gaps between the ends of the units and the inner surfaces are flush and even. Sealant shall be applied to the mating surfaces of each unit. The method of sealing the joints shall be the method given for co ncrete pipe in Subitem 530.03(d)3a. Unless shown otherwise on the plans, the Contractor shall have the option to use any of the type joint sealers given for rigid pipe in
Article 846 — 01.
5.Backfill . Precast units shall be backfilled in accordance with th e requirements given for pipe in Subarticle 530.03(e).
6.End Sections for Precast Concrete Culvert Units . End sections for precast units, if required, shall be constructed in accordance with the details shown on the plans.
524.04 Method of Measurement.
Payment for reinforced concrete box culverts will be based on units of cubic yards {cubic meters} of Culvert Concrete and pounds {kilograms} of Steel Reinforcement. The quantity of concrete and reinforcing steel for both cast in place and precast concrete cu lverts shall be based on the height and width of the openings, the number of barrels, the length of the culvert, and the quantity of concrete and reinforcing steel per unit length of the culvert shown on the plans for the construction of cast in place culv erts. The quantity of concrete and reinforcing steel shown for precast culverts will always be the quantity required for the construction of a cast in place culvert with the same height and width of openings, number of barrels and length. Wingwalls, par apets, toewalls, and apron quantities shall also always be based on the quantities given on the plans for cast in place construction regardless of a requirement for the installation of precast units. No additional payment will be made where barrel lengths, apron areas, backfilling, or items of work have to be increased due to the Contractor selecting the option to furnish and install precast units. Fill concrete required between barrels of precast units will not be measured or paid for separately. Steel Rei nforcement will be measured and paid for under Section 502. Excavation and Backfill will be measured and paid for under Section 214 with the limitation that payment for foundation backfill for a bedding layer for precast concrete culverts will only be made for a thickness of 4 inches {100 mm} and a width of 2 feet {600 mm} wider than the extent of the outside walls. Separate payment will not be made for any other items of work involved.
529.02 Materials.
524.05 Basis of Payment.
a.Unit Price Coverage . The contract price for Culvert Concrete and Culvert Concrete Extension shall be full compensation for all labor, tools, equipment, and incidentals necessary to construct the complete culvert and related structures (toe walls, wing walls, parapets, connections to draina ge structures, etc.). The contract price shall also be full compensation for design and submittals, construction of cofferdams, temporary diversion channels, protection of water quality at cofferdams and diversion channels, flood protection and falsework a nd formwork. Payment will not be separated for individual culverts.
b.Payment will be made under Item No .: 524-A Culvert Concrete ( * ) - per cubic yard {cubic meter} 524-B Culvert Concrete Extension ( * ) - per cubic yard {cubic meter} * Enter either Cast In Place or Precast if the type of construction must be designated. SECTION 529 RETAINING WALL
529.01 Description.
Retaining walls shall be constructed at the locations and within the limits shown on the plans. Standard det ails may be shown on the plans for the construction of cast -in-place reinforced concrete retaining walls. The details for the construction of other types of retaining walls may also be shown on the plans. The submittal and approval of the design and detai ls of a retaining wall is required if the details of the retaining wall are not shown on the plans.
529.02 Materials.
a.Selected Backfill Material . Selected backfill material for Mechanically Stabilized Earth (MSE) Walls and Gravity Walls shall be well g raded, angular, commercially produced sand or crushed stone (material containing slag will not be allowed) free from organic matter and/or other deleterious material. The following types of materials will be allowed: • Concrete sand meeting the requirements of Section 802, Fine Aggregates (F.M. waived). • Section 801 Coarse Aggregate crushed material that is smaller than #467 with 10% or less passing the #200 {75 µm} sieve. • Crusher run material with 100% passing a 2 -inch {50 mm} sieve and with 10% or less passi ng the #200 {75 µm} sieve.
b.Cast-in-Place Reinforced Concrete Retaining Wall . Concrete for cast -in-place reinforced concrete retaining walls shall be Class A concrete in accordance with the material requirements given in Section 501. Reinforcing steel shall be furnished and placed in accordance with the material requirements given in Section 502. The bituminous expansion joint filler and waterstop shall meet the requir ements given in Section 832. Dowels at expansion joints shall be plain Grade 60 bars meeting the requirements given in AASHTO M 31. Pipe sleeves at expansion joints shall be Grade 36 sleeves meeting the requirements given in AASHTO M 270. Cast-in-place wal ls shall have a deposit (belt), not less than 1 foot {300 mm} wide and 1 foot {300 mm} deep, of approved local or commercial free draining material placed full length along the back face of the vertical walls at the line of weepholes. This material shall c onform to the requirements given in Subarticle 214.02(b).
c.Mechanically Stabilized Earth Retaining Wall . Approved ALDOT MSE wall systems are shown in the "Material, Sources and Devices with Special Acceptance Requirements" manual, List II -22, "MSE Wall Systems". The materials required for a mechanically stabilized earth retaining wall shall meet the requirements of the approved MSE wall system. The material and construction requirements shall be shown on the details of the wall submitted
Source: Alabama Standard Specifications for Highway Construction, 2022 Edition. Pages 399–401 of 934.