Kingscote Streets Upgrades - Kangaroo Island Council

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On completion of construction of the scour protection apron the surrounding ground disturbed during the works shall be reinstated by filling as necessary and grading to conform to adjacent ground conditions. 4.3.21 Connection to Existing Drain Construction of the design drains includes connecting to the existing drain or drains in the locations shown on the drawings. Design information provided on the location of existing drainage lines and structures may not be sufficiently accurate and is based in situ construction. The use of precast drainage structures shall be at the Contractor's risk. The Contractor shall ensure that interference with an existing drain does not impede the functioning of that drain, and the Contractor shall program the work to take account of likely flows and shall take all necessary measures to handle the existing flows and any consequences arising from the temporary interference shall be the responsibility of the Contractor. The connection of the design drain to the existing drain shall be constructed to the details shown on the drawings. 4.3.21.1 Connection to Existing Concrete Channel, Pipe, Box Culvert or Junction Box The connection of the design drain to the existing concrete structure shall be a direct connection through the wall of the existing structure. The hole to accommodate the design drain shall be made in the wall of the structure using cutting or drilling tools as approved by the Superintendent to give a neat opening. The design drain shall be let into the hole so made and the joint shall be grouted in using a 1:3 cement and sand mortar trowelled to a smooth surface. The end of the design drain shall be cut and trimmed so that the joint is finished flush with the internal wall of the existing structure. To ensure adhesion of the jointing materials, the end of the drain and the surface of the wall of the existing structure shall be thoroughly cleaned off and saturated with water before the joint is made. A concrete bandage shall be placed around the joint on the external surfaces. All concrete work shall be in accordance with the requirements of the Concrete and Concrete Work section of this specification. 4.3.21.2 Connection by New Junction Box The connection of the design drain to the existing drain shall be at a new junction box to be constructed on the existing drain. The existing drain shall be exposed by excavation at the required location, and a junction box constructed to the details shown on the drawings. The portion of the existing drain within the junction box shall be broken out and removed. The ends of the existing drain shall be cut and trimmed such that the joints are finished flush with the internal walls of the new junction box. Alternatively, and subject to the prior approval of the Superintendent, the Contractor may elect to remove the portion of the existing drain no longer required by the design conditions prior to the junction box construction. The joints between the ends of the existing drain and the walls of the junction box shall be grouted in using a 1:3 cement and sand mortar trowelled to a smooth surface. The construction of the junction box shall comply with the requirements of the Drainage Structures clause in this section of the specification. 4.3.21.3 Connection to Existing Open Earth Channel The connection of the design drain to the existing open earth channel shall be made by the construction of a reinforced concrete headwall at the end of the design drain. Ref No. 20120236SA1 Kingscote Streets Upgrades Technical Specification 19
All concrete work shall be in accordance with the requirements of the Concrete and Concrete Work section of this specification. 4.3.22 Open Earth Channels Open earth channels shall be constructed in the locations and to the lines, levels, grades and dimensions as shown on the drawings. The construction shall be carried out in accordance with the relevant requirements of the Site Preparation and Earthworks section of the specification. The surplus material from the excavation of the open channel unlined drains shall be disposed of in the manner described in the Site Preparation and Earthworks Section of this specification. 4.4 Quality Requirements – Stormwater Drainage 4.4.1 Inspections The following Hold Points are required during the construction of stormwater drainage: H-SD1 H-SD2 Excavation complete Pipe-laying complete H- SD3 Backfilling complete Note: If the drain is backfilled before the pipeline is check-levelled and inspected by the Superintendent (Stage 2), either part or ALL of the backfilling may be required to be removed by the Contractor to facilitate checking and inspection. Inspection can be made promptly if a request is received the previous day. All materials and methods used are to be in accordance with sound drainage practice and to the satisfaction of the Superintendent. The Superintendent may require tests on the job at any stage of construction. 4.4.2 Quality Testing 4.4.2.1 Compaction Testing Compaction tests are to be carried out at the frequency specified in the Site Preparation and Earthworks section of this Specification. 4.4.2.2 Concrete Supply The Contractor shall undertake quality testing of concrete incorporated into kerbing at the following minimum frequency: Table 4.3 Item Compressive Strength Slump Concrete testing Frequency Minimum Testing Frequency One test cylinder from the first truck, and one on average per 5 trucks One slump every second truck Concrete sampling and testing shall be undertaken in accordance with AS 1012. At completion of the kerbing the Contractor shall clear all water tables of dirt and debris and conduct a water test to demonstrate that all water tables are free draining. 4.4.2.3 Flow Test Immediately prior to the practical completion inspection, the Contractor is to undertake a flow test of all pipes including PVC pipes in the presence of the Superintendent. Any blockages or concerns with the flow test raised by the Superintendent shall be investigated by the Contractor and repaired as necessary. The section of pipe is to be flow tested again following repair. Ref No. 20120236SA1 Kingscote Streets Upgrades Technical Specification 20
Page 1 and 2: Kingscote Streets Upgrades Technica
Page 3 and 4: Table of Contents 1 General Provisi
Page 5 and 6: 5.2.2 Quality Testing 23 5.2.3 Tole
Page 7 and 8: Table 4.2 Compaction requirements f
Page 9 and 10: Table Error! No text of specified s
Page 11 and 12: The Contractor shall be responsible
Page 13 and 14: • Lateral supports - provide late
Page 15 and 16: • Material, which, after compacti
Page 17 and 18: All areas disturbed by the excavati
Page 19 and 20: 3.3.8.2 Placing Fill The method of
Page 21 and 22: 3.4.2 Materials Suitable materials
Page 23 and 24: 3.4.5 Tolerances Construction Toler
Page 25 and 26: 4.2.4 Concrete Concrete grade for d
Page 27 and 28: 4.3.8 Pipe Surround Bedding materia
Page 29: No pumping will be permitted during
Page 33 and 34: 5 Pavement Subgrade This section of
Page 35 and 36: 5.2.4 Acceptance Criteria Areas whe
Page 37 and 38: 6.3.3 Compaction of Granular Paveme
Page 39 and 40: The following test procedures shall
Page 41 and 42: 7 Spray Seals This section of the s
Page 43 and 44: • retains aggregate after applica
Page 45 and 46: The application temperatures for pr
Page 47 and 48: 7.5 Quality Requirements - Spray Se
Page 49 and 50: 8 Kerbing This section of the speci
Page 51 and 52: Wherever the work of placing concre
Page 53 and 54: 9 Verges, Footpaths and Driveways T
Page 55: Footpaths and driveways Absolute ±

Kingscote Streets Upgrades - Kangaroo Island Council

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