Presentation on theme: "2013 Construction and Material Specifications Hydraulics and Environmental Summary Gary Angles, Office of Construction Administration."— Presentation transcript:
12013 Construction and Material Specifications Hydraulics and Environmental Summary Gary Angles, Office of Construction Administration
2207 TEMPORARY SEDIMENT AND EROSION CONTROLS This item has been removed from the 2013 C&MS. Stormwater Controls are included in SS832.Cleaned up references to OHWM in the specs and SCDsRevised updated MOPProposed CGP public notice January 11
3Item 601 Slope and Channel Protection DescriptionRemoved interlock precast concrete blocks and added Articulating Concrete Block Revetment SystemRiprapB. Revised definition for articulating concrete block revetment system and removed interlock precast concrete block.Tied concrete block matAdded reference to and to install per the manufacturer’s recommendation.Articulating concrete block revetment systemNew material type description.Basis of paymentAdded: Articulating Concrete Block Revetment System.Removed: Water Quantity Swale Aggregate, Tied Concrete Block Mat for Water Quantity Swale and Interlock Concrete Blocks.
4The Articulating Concrete Block Revetment System is a segmented mat used for hard armoring along stream banks, lakes and major channels.Articulating Concrete BlockRevetment SystemTied Concrete Block Mat is a rolled product used at bridge ends and underdrain outlets.Tied Concrete Block Mat
5Item 602 MASONRY 602.02 - Materials Removed reference to R and added C granular material types.Construction requirements8E. Added section for pre-cast structures for wing walls and headwalls and removed slab footers and cut off walls.Double PE seal requiredMore to follow RE: Standard method ofmeasurement
6Items 603 and 604Removed item 603 and 604. Performance based 611 will replace the 603 and 604.Item 611
8Item 651 TOPSOIL STOCKPILED Construction requirements653 reference removed and specific material handling describedItem 653 TOPSOIL FURNISHED and PLACEDMethod of measurementThe Department will measure compacted Topsoil Furnished and Placed by the number of CY accepted in place.
9Item 671 EROSION CONTROL MATS ConstructionA. Removed Type D.Coconut fiber with biodegradable tissue (no longer manufactured)C. Removed this entire sectionEliminated mat type not being used. Described Type H mats that were a modified version of type A mats.
11Item 611 PIPE CULVERTS, SEWERS, DRAINS, AND DRAINAGE STRUCTURES This is a Performance Based Specification that encompasses 2010 items: 603, 604 and SS 802.SS 802 is now item 611.
12Why Change?Method based specifications were being faulted when conduit was poorly installed by the ContractorResulted in the Department accepting poorly installed conduit or incurring additional costs during construction
13Background1997 – SS802 optional performance based installation specification included on all projects with 603 and 604.
14Background2008 SS 802 was revamped with the intent of developing a performance based standard specification2009 SS 802 was required on a number of projects state wide in an attempt to pilot the specification.2012 Projects that are sold after March 31, 2012 and have any Item 603 or Item 604 work and have a construction cost estimate of 10 million dollars or more.2013 Implement C&MS 611 (Page 471)
15General DifferencesThe contractor develops and executes his own installation plan for all conduit and drainage structures.Requires documented coordination between the material supplier and the installer.
16General Differences (cont’) Conduit and drainage structures require both Installation and Performance Inspection that is tied to payment.Contractor is required to repair or replace conduits and drainage structures that do not meet the performance requirements.611 Substantially expanded the acceptable inspection methods and equipment versus SS 802.
17How it worksContractor selects the drainage component materials allowed by contract (as shown in the plan).Contractor develops an installation plan appropriate for the materials selected.Contractor installs, monitors and documents the installation.Based on contract criteria, the Contractor provides inspection / 3rd party evaluation and certification of Performance.
18ConduitConduit shown in the plans is designed for hydraulic capacity and durability onlyStructural design is performed by the Contractor in coordination with the conduit Manufacturer
19Submittals Shop Drawings Installation Plan Construction Inspection FormsPerformance Report
20Shop DrawingsHave a Registered Engineer prepare, sign, seal and date all calculations. Second Registered Engineer checks and seals the submittal as well.Allow at least 15 days for the review.Note:D load special design reinforced concrete pipeConcrete precast 3 sided, arches and round sectionsSubstitutions involving box culverts and or 3 sided, arches and round sections.
21Installation Plan Trench dimensions Identify locations where the conduit is installed in acut installationfill installationType of bedding and backfill material with lift thicknessCompaction density and equipment proposed for bedding and backfillIdentify the starting location for each run of conduitMaximum allowable joint gap between conduit sectionsOther installation details as necessary
22Installation Plan (cont.) Provide written confirmation from the conduit manufacturer that the pipe material and strength supplied are appropriate for the material and density requirements described in the installation plan regarding backfill and bedding as well as height of cover. This confirmation by the conduit manufacturer will not relieve the Contractor of the responsibility for obtaining the required results.
23Construction Inspection Forms Perform work only in the presence of the Contractor’s representative doing the inspection. Submit construction inspection forms to the Engineer for each run of conduit and each drainage structure.Form CA-P-1 for conduitForm CA-P-3 for drainage structures. “I certify that the information on this form is accurate and all deviations from the current installation plan have been noted.”
24Performance ReportPerformance report required for each Performance InspectionSeparate report for each change in conduit size or change in material typeReport includes the following:Project informationDate of inspectionType and size of conduitConduit diameter report from the ManufacturerTime of video recordingLocation – latitude and longitude where conduit crosses centerline of roadway – for culvertsSummary of all defects and locationsSize of Mandrel and how the size was calculated if using MandrelResults from crawler mounted camera with laser profiler if using laser profiler
25Performance ReportSubmit performance report within 5 days of completing a performance inspection to the Project Engineer
26Performance Inspection Notify the Engineer at least five workdays before conducting a performance inspection.A performance inspection is not required for projects that meet all of the following:All conduit is Type C (Sewers not under pavement)Conduit plan quantities are less than 100 feetAll conduit has less than 16 feet of maximum fill height
27Performance Inspection (Cont’) Inspection is performed between days after: thecompletion of the finished grade when not below pavementafter the completion of the aggregate base when below pavement.after completion of conduit correctionEngineer may adjust this time frame if the contract duration will not permit a 30 day waiting period.
28Performance Inspection (Cont’) Inspection required for Conduits and Drainage StructuresInspection required for any conduit that requires correctionInspection may be performed by ContractorEnsure the Project Engineer is present during all performance inspection activitiesProject Engineer must be notified at least 5 workdays before conducting a performance inspection
29Manual or Remote Inspection Either Manual or remote inspection are required to measure cracks, deflections, and joint gaps in conduit.Conduits with a rise 48 inches and greater Manual InspectionConduits with a rise of 36 to 48 inches Manual or Remote InspectionConduits with a rise of 12 to 36 inches Remote InspectionDrainage Structures are inspected Manually
30Manual InspectionManual inspections require entering the conduit or drainage structure to record video and to make measurements - coordinate confined space access per OSHA requirements.
31Remote InspectionUse a crawler mounted camera to record video with the equipment described in Supplemental Specification 902.Remove all debris from the conduits being inspected according to Dewater the conduit if the water level hinders the performance of the equipment.
32Conduit Inspection - Flexible Conduit Evaluate:If infiltration is observed.All racking, buckling or denting.Vertical alignment of conduit – (Ensure there are no vertical sags in the conduit that trap water)Repair or replace conduit if the joint gap exceeds the tolerance (as described in the installation plan) for a length greater than or equal to 1/3 of the circumferenceRepair all coating damageRepair or replace conduit if deflection > 7.5%.
33Conduit Inspection - Rigid Conduits Evaluate if infiltration is observedEvaluate if joint gap exceeds the tolerance* for a length less than 1/3 of the circumferenceEvaluate vertical alignment of conduit – Ensure there are no vertical sags in the conduit that trap water. Repair or replace conduit if the joint gap exceeds the tolerance* for a length greater than or equal to 1/3 of the circumferenceRepair or replace conduit if cracks > 0.10 inchRepair or replace conduit if spalls or slabbing are observed* Maximum joint gap listed in the installation plan
34Conduit EvaluationHave an independent Registered Engineer evaluate the conduit and any defects as required by AASHTO LRFD Bridge Construction Specifications (Section 26, 27 and 30) with modifications according to this specification.The independent Registered Engineer cannot be an employee of the Contractor or the conduit manufacturer.
35Conduit Evaluation Certification Sign off “I certify that repairs are not required for the conduit to function as designed and that the conduit meets the design life requirements described in the version of the Department’s Location and Design Manual, Volume 2, Drainage Design, used in the original design.”“I certify that this repair plan was designed to ensure the repaired conduit will function as designed and will meet the requirements described in the version of the Department’s Location and Design Manual, Volume 2, Drainage Design, used in the original design.”
36Drainage Structure Evaluation Drainage Structure Evaluation. Have an independent Registered Engineer evaluate the drainage structures and any defects listed in the table below.Certification of Engineer’s findingrepairs are not required …meets the design lifethis repair plan was designed to ensure the repaired drainage structure will function as designed…
37Surface SettlementsRepair any surface settlement within the trench limits or within 4 feet of a drainage structure. Have an independent Registered Engineer evaluate the conduit according to or the drainage structure according to Perform all repair work at no additional cost to the Department.
38Basis of PaymentPayment for all inspection(s) is included with the contract unit price of the corresponding pay item.All required repairs, including any settlement problems, must be made prior to acceptance.Department will not make additional payment for repair work on conduit installed under this specification.
39Basis of PaymentThe Department will pay for accepted quantities according to the following schedule:60% After installation of conduit or drainage structure10% After performance inspection is completed30% After acceptance of the conduit or drainage structure
40SS 902 – Conduit Inspection Equipment Covers equipment used to inspect conduitCrawler Mounted Camerawith Laser ProfilerMandrel
41SS 811 - CONDUIT AND DRAINAGE STRUCTURES Method based specification for conduits and drainage structuresOld CMS 603 and 604 combinedExclusive use for Local Governments onlyNot permitted for ODOT let projectsWill be eliminating from ODOT Specifications in January 2015
42SS 811 - CONDUIT AND DRAINAGE STRUCTURES Designer is responsible for furnishing conduit meeting structural, hydraulic and durability designRefer to archived L&D Vol. 2, for Height of Cover FiguresRefer to SCD DM-1.4 for Conduit Installation
43SS 940 - 14 FT TO 20 FT PRECAST REINFORCED CONCRETE BOX CULVERTS Large Reinforced Concrete Boxes do not require special designs like 2010 specificationsVia Boiler Plate (SS 800), SS 940 can be used for reinforced boxes with spans feet