A6 Attachment 4 Revised Section 33 46 36 Toe Drains.pdf

Big Sandy Dam Reservoir Enlargement Eden Project, Wyoming Solicitation No. 140R4020R0015

Toe Drains 33 46 36 - 1

SECTION 33 46 36

TOE DRAINS

PART 1 GENERAL

1.01 MEASUREMENT AND PAYMENT

A. 8-inch Diameter Slotted PVC Pipe:

1. Measurement: Length of pipe installed.

a. Length along pipe centerline between ends in place.

b. No allowance for lap at joints.

2. Payment: Linear foot price offered in the Price Schedule.

B. 8-inch Diameter Solid PVC Pipe:

1. Measurement: Length of pipe installed.

a. Length along pipe centerline between ends in place.

b. No allowance for lap at joints.

2. Payment: Linear foot price offered in the Price Schedule.

C. 10-inch Diameter Solid PVC Pipe:

1. Measurement: Length of pipe installed.

a. Length along pipe centerline between ends in place.

b. No allowance for lap at joints.

2. Payment: Linear foot price offered in the Price Schedule.

D. 12-inch Diameter Slotted PVC Pipe:

1. Measurement: Length of pipe installed.

a. Length along pipe centerline between ends in place.

b. No allowance for lap at joints.

2. Payment: Linear foot price offered in the Price Schedule.

E. 12-inch Diameter Solid PVC Pipe:

1. Measurement: Length of pipe installed.

a. Length along pipe centerline between ends in place.

b. No allowance for lap at joints.

2. Payment: Linear foot price offered in the Price Schedule.

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F. Drain Cleanouts:

1. Measurement: Number of drain cleanouts installed

2. Payment: Drain cleanout price offered in the Price Schedule.

a. Includes steel pipe and locking cap and cover.

1.02 REFERENCE STANDARDS

A. American Waterworks Association (AWWA)

1. AWWA C900 Standard for Polyvinyl Chloride (PVC)

Pressure Pipe and Fabricated Fittings, 4 in.

through 12 in. (100 mm through 300 mm) for Water Distribution

B. American Association of State Highway and Transportation Officials (AASHTO)

1. AASHTO SSHB-02 Standard Specifications for Highway

Bridges, Seventeenth Edition

C. ASTM International (ASTM)

1. ASTM D1784-11 Rigid PVC Compounds and Chlorinated

PVC Compounds

2. ASTM D2837-13 Obtaining Hydrostatic Design Basis for

Thermoplastic Pipe Materials or Pressure Design Basis for Thermoplastic Pipe Products

3. ASTM D3139-11 Joints for Plastic Pressure Pipes Using Flexible Elastomeric Seals

4. ASTM F477-14 Elastomeric Seals (Gaskets) for Joining Plastic Pipe

1.03 SUBMITTALS

A. Submit the following in accordance with Section 01 33 00 - Submittals.

B. RSN 33 46 36-1, Approval Data:

1. Excavation plan:

a. Method for excavating trench.

2. Pipe Data:

a. Details and materials for pipe connections and anticipated field fabricated joints.

b. Pipe slot pattern.

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3. Installation plan:

a. Manufacturer’s installation instructions.

b. Method to protect pipe and hold pipe in place during backfill.

c. Method for working backfill material under haunches.

d. Method for cleaning pipe after installation.

e. Method for protecting pipe after backfill is placed.

f. If the Contractor proposes to use construction equipment that exerts a load greater than H-20 loading on top of pipe, submit details of proposed methods, crossing location, equipment type, loading conditions, and other pertinent details.

4. Testing and video inspection plan:

a. Details, procedures, and sequences of testing and video inspection of drain and outfall.

C. RSN 33 46 36-2, Certifications:

1. Manufacturer's certification that raw materials and pipe meet specification requirements.

D. RSN 33 46 36-3, Samples:

1. Three, 1 foot long samples of each size of slotted pipe and solid pipe sampled from each lot of pipe to be used in work.

2. Label each sample with project name, specifications number, manufacturer’s name, product name, date of manufacture, and manufacturer’s lot identification number.

E. RSN 33 46 36-4, Inspection Videos:

1. DVD format with audio recording documenting video inspection of drains.

1.04 DELIVERY, STORAGE, AND HANDLING

A. Pipe:

1. Store and handle in accordance with manufacturer’s recommendations.

2. Do not use rope, cable, or chain slings for handling pipe. Canvas slings not less than 12 inches wide may be used for handling pipe.

3. Protect pipe from damage and prevent dirt from getting inside pipe when lowering pipe into trench, laying pipe, and positioning pipe.

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PART 2 PRODUCTS

2.01 POLYVINYL CHLORIDE (PVC) PIPE

A. Slotted Pipe:

1. DR 18 Polyvinyl Chloride (PVC) solid wall pipe conforming to AWWA C900.

2. Type I, Grade I PVC compound with a cell classification of 12454 per

ASTM D1784.

3. Slots:

a. Slotted pipe details are provided on drawing 153-D-60024.

b. Slots shall be manufacturer provided.

B. Solid Pipe:

1. DR 18 Polyvinyl Chloride (PVC) solid wall pipe conforming to AWWA C900.

2. Type I, Grade I PVC compound with a cell classification of 12454 per

ASTM D1784.

C. Pipe Joints:

1. Water-tight joints.

D. Fittings and Couplings:

1. Fittings: Supplied or as recommend by pipe manufacturer.Shall meet the requirements of AWWA C900 2016.

2. Epoxy-coated ductile iron.

3. Mechanically restrained.

4. Exterior protected with Poly Wrap.

3.5. Elbows shall be 22.5 degrees or less.

E. Flexible Couplings.

2.02 OUTFALL SCREEN

A. Stainless Steel Wire Screen:

1. Stainless steel, ASTM A240, Type 304.

2. Mesh Openings per Linear Inch: 1 by 1

3. Wire Diameter, Minimum: .120 inches

B. Collar for Screen:

1. Stainless steel, Type 304.

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2. Thickness: 0.25 inches.

3. Width, Minimum: 0.5 inches.

C. Screws for attachment:

1. No. 14.

2. 1/4-inch thread diameter.

3. Stainless steel.

4. Self-drilling, self-tapping.

2.03 DRAIN CLEANOUTS

A. Steel Casing: ASTM A53, standard weight, galvanized, type E or S, grade B.

B. Caps:

1. Caps manufactured by Royer Quality Castings, Inc., 380 South Reading Avenue, Boyertown, PA 19512; or equal, with the following essential characteristics:

a. Aluminum alloy.

b. Sized to fit cleanout pipe.

c. Two-piece locking well cap.

1) Lower half attaches to steel pipe with minimum of 3 set screws.

2) Upper half locks over lower half and covers set screws.

3) Cap pieces lock together by single padlock.

2.04 SAND FILTER AND GRAVEL DRAIN MATERIALS

A. In accordance with Section 31 24 14 – Filter, Zone 2A Material and Section 31 24 15 – Gravel Drain, Zone 3A Material.

PART 3 EXECUTION

3.01 PREPARATION

A. Keep excavation free from water to ensure proper installation of pipe and filter and drain materials. Refer to Section 31 03 30 - Removal of Water from Excavation.

3.02 PIPE INSTALLATION

A. Install pipe at locations indicated on drawings or directed by the COR.

B. Lay pipe to elevations, lines, and grades shown on drawings or as approved by COR.

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C. Make connections to existing pipes as shown on drawings.

D. Cap or plug ends of pipe during periods of no work.

E. Protect pipe ends from damage. Remove or replace broken, cracked, or unsuitable pipe and replace at no additional cost to the Government.

F. Before and during assembly of a joint, keep parts free of mud, oil, or grease. Keep the pipe interior free from deposits of mud, sand, gravel, or other foreign matter and in good working condition until the contract is complete and accepted.

G. Use long radius PVC sweep fittings or series of 22.5 degree fittings at any location where pipe changes direction by more than 22.5 degrees.

H. Use standard angle and elbow configurations for bends and branch where pipe changes direction by less than 22.5 degrees.

I. Do not bend straight pipe segments or angle joints to accommodate changes in direction.

J. Provide a minimum of five feet between fittings where more than one fitting is required.

K. Cover outfall ends of drain pipes with stainless steel screen as shown on drawings.

Securely attach to end of pipe with stainless steel bands.

L. Do not exceed manufacturer recommended deflection angles at joints.

3.03 BACKFILL

A. Backfill with materials as shown on drawings.

B. Maintain pipe grade and alignment during placement of material adjacent to and over pipe. Provide complete circumferential support for pipe to prevent uneven pressures and unacceptable ring deflections.

C. Use special compaction techniques in accordance with Section 31 23 02 – Compacting Earth Materials.

D. Do not backfill until installed pipe has been inspected and approved by the COR.

E. Initially, place backfill on both sides of pipe and rod until backfill completely fills spaces under pipe haunches and between pipe and trench.

F. Do not permit any vehicle or equipment travel over pipe until backfill material has been placed to a minimum depth of 3 feet over the top of pipe, or to a greater depth when recommended by the pipe manufacturer.

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1. After minimum earth covers are in place, the maximum equipment loading allowed over the pipe shall be H-20 loading in accordance with the AASHTO

SSHB.

2. Before using construction equipment that exerts a load larger than H-20 loading on the top of the pipe, submit details of the proposed methods, crossing location, equipment type, and loading conditions to COR for approval.

3.04 CLEANING DRAINS

A. Maintain inside of pipes clean during construction.

B. Before performing plug test, clean drain lines and outfalls to remove deposits of mud, sand, gravel or other foreign matter.

C. Use cleaning methods only as approved by COR.

3.05 PLUG TEST

A. Plug:

1. Torpedo-shaped, rigid plug.

2. Tapered at both ends.

3. Diameter: 1-inch less than inside diameter of pipe to be tested.

4. Length: Sufficient length to eliminate possibility of wedging the plug in drainage pipe, by tipping, but not so long as to prevent it from navigation bends in drain and outfalls when pulled.

B. Line: Free of protrusions that could snag pipe or joints.

C. Testing pipe:

1. Test pipe for obstructions and deformations by pulling plug through pipe.

2. Maximum pull: 150 pounds of steady pull with no jerking.

D. Obstructions and deformations: Repaired at expense of Contractor by a method approved by the COR.

E. When repairs required, retest pipe after pipe repairs completed.

3.06 CONTRACTOR FIELD QUALITY TESTING

A. Video Inspections of Toe Drain Pipes:

1. Perform one video inspection of existing toe drain pipe once the drain has been exposed at each cleanout location.

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2. Perform one video inspection on slotted portions of drains with no greater than five feet of cover as directed by COR.

3. Perform one video inspection on slotted and solid portions of drains with full cover as directed by COR.

4. Obstructions and deformations: Repaired at expense of Contractor by a method approved by COR.

5. Perform inspection of drains according to the following:

a. Inspect entire length of new pipe drains as indicated on drawings when all fill material is placed over pipe.

b. Use compass camera for initial inspection. Camera shall be capable of locating pipe elevation and coordinates.

1) Camera-crawler onboard compass unit capable of displaying heading, pitch, and roll data on video monitor screen.

a) Heading: Rotation about the z-axis.

b) Pitch: Rotation about the x-axis.

c) Roll: Rotation about the y-axis.

6. Video Camera:

a. Closed-circuit television video camera specifically designed and built for pipe inspection.

b. Capable of accessing pipe installed on a 0.44 slope.

c. Capable of negotiating corners and bends.

d. Equipped with 360-degree radial view rotating head and zoom lens.

e. Operable in 100 percent humidity.

f. Include footage indicator and audio recording to allow documentation of locations and problems along pipe.

g. Capable of recording images in color.

h. Capable of providing 1,000 feet of tether.

i. Operated and controlled via cable tether.

7. Lighting for Video Inspection:

a. Allow clear, focused image of entire periphery of pipe, observable on television monitor.

b. Include variable intensity control, remotely controlled from monitoring station.

c. Adjust lighting to minimize glare.

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8. Perform inspection in presence of COR. Notify COR, in writing, of date and time of inspection at least 7 days before inspection.

9. Rate of Camera Movement along Pipe, Maximum: 30 feet per minute.

10. Record one reach of pipe per DVD. One reach of pipe shall be one continuous section as indicated on drawings.

11. Provide convenient access for Government personnel to view monitoring during inspection.

12. Record inspection on color video tape in DVD format.

13. Mark each DVD and DVD case with date; time; pipe segment location; contract name and number; and Contractor name, address, and phone number.

14. Document camera location by superimposing continuous distance record on recorded image.

15. Provide voice-over recording of date, time, and pipe segment location on DVD.

16. Document obstructions and anomalies observed in pipe as part of audio record.

17. Clean and flush deposits of mud, sand, gravel or other foreign matter encountered during the final DVD inspection. After cleaning, re-inspect pipe to assure no deposits of mud, sand, gravel or other foreign matter remain in pipe.

END OF SECTION

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