22 14 00 - FACILITY STORM DRAINAGE.pdf

MINISTRY OF HOUSING Western Sector Projects Sitework & Infrastructure OMRANIA and ASSOCIATES Project Specification

FACILITY STORM DRAINAGE SECTION 22 14 00 - 1

SECTION 22 14 00

FACILITY STORM DRAINAGE PART 1: GENERAL

1.01 SECTION INCLUDES

A. Storm water drainage systems including, but not limited to the following:

1. Piped storm water drainage network.

2. Catch basins.

3. Manholes.

4. Concrete channels.

1.02 RELATED SECTIONS

A. Section 03 30 00 Cast in Place Concrete.

B. Section 22 05 00 Common Work Results for Plumbing.

C. Section 22 05 13 Common Motor Requirements for Plumbing Equipment.

D. Section 31 23 16 Excavation.

E. Section 31 23 16.13 Trenching.

F. Section 33 05 13 Manhole and Structures.

G. Section 33 32 16 Package Utility Waste Water Pumping Stations.

H. Section 33 46 00 Subdrainage.

1.03 REFERENCES

A. ANSI A 40 Safety Requirements for Plumbing.

B. ASTM C 14 Concrete Sewer, Storm Drain, and Culvert Pipe.

C. ASTM C 76 M Reinforced Concrete Culvert, Storm Drain and Sewer Pipe (metric).

D. ASTM C 443 Joints for Circular Sewer and Culvert Pipe Using Rubber Gaskets.

E. ASTM C 478 Standard Specification for Precast Reinforced Concrete Manhole Sections.

F. ASTM C 497 Test Method for Concrete Pipe, Manhole Sections, or Tile.

G. ASTM C 518 Corrosion Resistant High Silicon Iron Castings.

H. ASTM C 913 Precast Concrete Water and Wastewater Structures.



I. ASTM C 923 Resilient Connectors Between Reinforced Concrete Manhole Structures and Pipes.

J. ASTM D 698 Test Methods for Moisture-Density Relations of Soils and Soil Aggregate Mixtures, Using (2.49 Kg) Rammer and (304.8 mm) Drop.

K. ASTM D 1557 Test Methods for Moisture-Density Relations of Soils and Soil Aggregate Mixtures, Using (4.54 Kg) Rammer and (457 mm) Drop.

L. ASTM D 1785 Specification for Polyvinyl Chloride (PVC) Plastic Pipe. Schedules 40, 80 & 120.

M. ASTM D 2321 Recommended Practice for Underground Installation of Flexible Thermoplastic Sewer Pipe.

N. ASTM D 2729 Polyvinyl Chloride (PVC) Sewer Pipe and Fittings.

O. ASTM D 2751 Acrylonitrile-Butadiene-Styrene (ABS) Sewer Pipe and Fittings.

P. ASTM D 3033 Type PSP Polyvinyl Chloride (PVC) Sewer Pipe and Fittings.

Q. ASTM D 3034 Type PSM Polyvinyl Chloride (PVC) Sewer Pipe and Fittings.

R. ASTM D 3017 Test Methods for Moisture Content of Soil and Soil and Soil Aggregate Mixtures.

S. SASO 14 Pipes for Potable Water of Unplasticized Plastic (Polyvinyl chloride PVC).

T. SASO 15 Methods of Testing Pipes for Potable Water of Unplasticized Plastic. (Polyvinyl Chloride PVC).

U. Uniform Plumbing Code.

1.04 SUBMITTALS

A. Comply with Section 01 33 00.

1.05 OPERATION AND MAINTENANCE DATA

A. Comply with the requirements of Sections 01 78 23 and 22 05 00.

1.06 DELIVERY, STORAGE AND HANDLING

A. Deliver all products in manufacturer's original protective packaging.

B. Inspect all products at time of delivery for damage and for compliance with specifications.

C. Repair or remove immediately from the site and replace any products that are found to be damaged or not in accordance with the Specification. For repair, obtain the Engineers approval before the proposed action.

D. Handle and store all products as recommended by the manufacturer to prevent damage and deterioration.



E. Supply handling equipment such as lifting beams, reinforced canvas slings, protective padding, struts, cradles, etc., required to handle products without damaging hardware or linings and coatings.

F. Store each pipe unit, stack and handle into the final location in such manner, and by such means, that afford its total protection from damage. The manufacturer's recommendations shall be taken as the minimum requirement.

G. Protect the products against damage and ambient conditions both during transport, site storage and immediately up to the time the products are installed. Protect products from mechanical damage and the effects of sunlight and heat, until backfilling operations have been completed.

H. Consider all safety aspects when locating, planning and constructing pipe stacking areas, and whilst stacking pipes.

PART 2: PRODUCTS 2.01 ACCEPTABLE MANUFACTURERS

Not Used.

2.02 MANHOLES

A. Construct reinforced cast-in-place concrete manholes, cleanouts and valve chambers in accordance with Section 03 30 00. Manhole sizes and levels shall be as indicated on the Drawings.

B. Unless otherwise agreed by the Engineer, construct manholes after laying pipes, except that manhole bases may be constructed earlier to avoid deterioration of the formation.

C. Sizes of manholes shall be related to the depth of the inlet below ground level and the number of branch connections. Refer to schedule of external Storm Water manholes. The minimum size of manholes governed by the number of branch connections shall be 300 mm per branch of 100 mm diameter and 400 mm per branch of 150 mm diameter, with adequate allowances for the angle of entry.

D. Protect exterior surfaces of all manholes in accordance with the provisions of Section 03 30 00.

E. Construct in-situ concrete manholes in accordance with Section 03 30 00. Finish of interior faces shall be fair-faced and exterior faces cast against formwork:

1. Cast concrete bases on a firm formation. A preliminary blinding layer of concrete 70 mm thick shall be placed, prior to the construction of bases.

2. Construct manholes with Class C 35 S reinforced concrete as detailed on the Drawings.

F. Construct pre-cast concrete manholes of pre-cast concrete rings conforming to ASTM C 478. Pipe entries into pre-cast concrete rings shall be pre-formed or core drilled to suit.

2.03 MANHOLE COVERS AND FRAMES

A. Covers and frames shall be the type, size and weight as shown on the Drawings, and as specified in Section 33 05 13. Frames set in 1:3 cement mortar and to the levels shown on the Drawings but with minor adjustment to suit actual finished levels. Level differences shall be



made up by pre-cast concrete raising pieces between the frame and the top of the manhole or shaft.

B. The words "STORMWATER" in Arabic and English shall be cast on the covers.

C. For each type of cover installed, supply five sets of lifting keys.

2.04 MANHOLE STEP IRONS

A. Provide cast iron manhole step irons complying with ASTM A 518.

2.05 GRANULAR BEDDING MATERIAL

A. Granular bedding material for pipelines and where otherwise required by the Specification or on the Drawings shall be well graded, with all material passing 12.5 mm sieve and at least 90% retained on 75 microns sieve as determined in accordance with ASTM D 422.

2.06 PIPEWORK AND VALVES

A. All pipework and valves shall be of sizes indicated on the Drawings and as specified in Section 22 05 00.

2.07 POLYESTER CONCRETE DRAINAGE CHANNELS

A. External drainage channels shall be constructed of polyester concrete with built-in fall of 0.5 to 0.6% and shall be easily interlocked with adjacent section. Channels shall be provided with cast-iron gratings, locked securely in position in at least two places/meter run with anti-vibration fixings. Foul air traps shall be utilized when a proprietary polyester concrete sump is used.

2.08 MARKER TAPE

A. Pipeline marker tape shall be 300 mm wide and 100 micron thick. Tape for installation above non-metallic mains shall be electronically detectable, except in specifically approved circumstances. Elsewhere, tape shall be of polythene, PVC or other plastic material approved by the Engineer. Tape shall be red in color and shall be printed in Arabic and English alternately with the words "CAUTION: BURIED STORM WATER DRAIN .

PART 3: EXECUTION 3.01 GENERAL

A. Install products comprising the Storm Water system in accordance with the approved method statement, manufacturer's instructions and recommendations, appropriate standards or as directed by the Engineer.

B. Excavation for trenches, bedding for pipework, and compaction of backfill shall be in accordance with Section 31 23 16.13.

C. Where a pipelines passes into or out of a structure and where settlement is likely to occur, two flexible joints shall be formed. The first joint shall be as close as practicable to the structure and the second at the further end of the first pipe. This first pipe length shall not be more than 600 mm for pipes up to and including 150 mm diameter and not more than 900 mm for larger



diameters up to 500 mm. Provisions for pipes larger than 500 mm diameter shall be as shown on the Drawings.

D. Where significant settlement is likely to occur, the Engineer may require more than two flexible joints at each location.

E. When a pipeline passes through a wall or other structure less than one pipe length wide, the above requirement shall not apply and a sleeve shall be formed through the structure so that there is a clear space of at least 75 mm wide all round the pipe. Adequate means shall be provided to prevent soil from entering this gap.

3.02 INSPECTION


B. Immediately prior to installation, inspect products for damage. Products that are found to be damaged or not in accordance with their respective standards and specifications shall not be incorporated in the permanent works, and shall be removed from site. Any remedial measures shall have the prior approval of the Engineer before being carried out.

3.03 BENDS AT BASE OF RAINWATER PIPES

A. Form bends at the base of rainwater pipes using two 45 large radius bends.

3.04 MANHOLES CLEANOUTS AND VALVE CHAMBERS

A. Excavation and backfilling shall be carried out in accordance with Section 31 23 16.

B. Cast-in-place and pre-cast concrete manholes and cleanouts shall be constructed in accordance with the requirements of Division 3, to the dimensions and details shown on the Drawings.

C. Channels through manholes shall be properly benched at the bottom of manholes and chambers as shown on the Drawings.

D. The pre-cast manufacturer shall cast all step irons for pre-cast concrete manholes integrally into the pre-cast manhole sections.

E. Where main the drain size increases at a manhole, the main channel shall be constructed to the larger pipe size. Pipe size change shall be effected using an eccentric reducer upstream of the manhole with pipe soffits level.

F. Unless stated otherwise on the Drawings or in the manhole schedule, all branch connections shall discharge over the main channel at half channel height and shall be swept in the direction of flow.

G. Branch connections direct to main drain lines which are not through a manhole or inspection chamber shall be soffit to soffit connections.

3.05 PIPEWORK

A. Excavation and backfilling be carried out in accordance with Section 31 23 16.13.

B. Install pipework in accordance with Section 33 05 00. Anchor and thrust blocks shall be provided as specified therein.



C. Marker tape shall be installed in trenches at a minimum height of 300 mm above all buried drains, pipelines and building connections during backfilling.

3.06 PUMP STATIONS

A. Install pump stations in accordance with Section 33 32 16.

3.07 CONNECTION TO SEWERS

A. Make all necessary arrangements to connect new pipework to existing sewers to the satisfaction of the authority having jurisdiction, including the payment of all connection and supervision charges.

3.08 TESTING

A. Test pipework in accordance with Section 33 05 00.

B. Test manholes as follows:

1. Test all manholes for water tightness not less than 4 weeks after backfilling and before Substantial Completion.

2. Temporarily seal all pipes entering chamber. To permit draining of test water, seal outlet pipe where it enters the next downstream chamber.

3. Fill chamber with clean water to a level of 1.5 m above crown of outlet pipe or top of chamber if less than 1.5 m deep.

4. Allow up to 8 hours for initial absorption and top up to test level before commencing test.

5. Water level shall be maintained within 60 mm of original level for 30 minutes without adding further water.

6. If permitted loss is exceeded, retest after a minimum period of two weeks. If permitted loss is exceeded at retest, remedy defect before recommencing test sequence.

3.09 FINAL CLEANING OF PIPELINES


B. Before handing over any pipeline, pass through a rubber disc plunger or swab and in the case of jointed pipelines, simultaneously flush the line with clean water. Both ends shall then be closed by temporary plugs or bulkheads to prevent entry of dirt or foreign matter.

END OF SECTION

SECTION 22 14 00

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22 14 00 - FACILITY STORM DRAINAGE.pdf