2. Normanby Road Early Works

2.1 Overview of Works

The Normanby Road early works involve demolition of the building at 11 Water Street, establishment of a Construction Support Area, construction of a temporary pedestrian bridge across the NAL and two retaining walls, and diversion of temporary and permanent utilities (such as water, wastewater, stormwater, gas, electricity and communications) along and in the vicinity of Normanby Road.

The early works are required in advance of the main construction works to provide adequate clearance between the CRL works and network utilities to enable construction of retaining walls, the Normanby Road grade separation bridge and the realigned Normanby Road / Boston Road / Nugent Street roundabout.

The Normanby Road early works are planned to extend over eight months, between February 2020 and September 2020. Figure 2.1 shows the area of these works.

Figure 2-1: Extent of the Normanby Road early works area

Refer to the CEMP for a detailed description of the works.

2.2 Topography and Drainage

The Normanby Road early works area encompasses 7 stormwater sub-catchments. The catchments and their boundaries are shown on Figure 2-2. All drainage flows to Motions Creek via the existing and future stormwater system (Figure 2-3). Page 11 | Normanby Road Early Works

The topography of the Normanby Rd early works area ranges in slope from 0.2% to 20%.

The topography of the area will be altered with the lifting of Normanby Road for the grade separation of the road from the rail corridor as part of the subsequent main construction works.

Figure 2-2: Normanby Rd Early Works Stormwater Sub-Catchments

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Figure 2-3: Motions Creek Catchment (Normanby Rd Early Works stormwater sub-catchments within blue box)

A large portion of Normanby Road is subject to the 1% Annual Exceedance Probability (AEP) floodplain and hence is a flood sensitive area. Overland flow paths (OLFPs) and flood sensitive areas in the Normanby Road early works area are shown in Figure 2-4 below.

Figure 2-4: Flood plains and OLFPs within the Normanby Road early works area

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Normanby Road Early Works

The OLFPs in this area will be altered due to the change of alignment of Normanby Road with construction of the permanent road over rail bridge and grade separation. The impact of that change and how it will be managed during main works construction does not form part of this early works ESCP.

2.3 Construction Methodology

The Normanby Road early works will be divided into stages as described in the CEMP and the Construction Staging Plans in Appendix B of the CEMP. The construction sequence is summarised in Table 2.1 below.

2.4 Earthworks

Earthworks associated with the Normanby Road early works will largely comprise:

excavation associated with network utility diversions (involving open trenching using excavators and hydro excavation trucks and directional drilling); contouring to establish Construction Support Area (CSA); and excavation associated with the construction ofone retaining wall and car park regrading at 32 Normanby Road.

The approximate earthworks areas and volumes required for the early works by construction stage are outlined in Table 2.1 below.

Table 2.1 Construction Sequencing, Approximate Earthworks Areas and Volumes

Stage Sub-Stages

Stage 0

Stage 1 (Mar –Apr 2020)

Demolition of the building at 11 Water Street.

1.1 –• Establishment of CSA and alternative car park for 32 Normanby Road within the CSA. • Construction of one retaining wall at 32 Normanby Road. • Installation of permanent south sewer line along the south driveway of 22-24 Normanby Road.

1.2 –• Construction of one retaining wall at 32 Normanby Road. • Installation of south sewer line along Normanby Road.

1.3 –

Construction sequence of works

1. Dismentle the roof, walls and base slab. 2. Minor contouring.

1. Clear site of weeds, trees, debris. 2. Place layer of clean aggregate. 3. Set up barriers, fencing, signs.

1. Remove seal. 2. Prepare foundation. 3. Build wall.

1. Cut and shred trees. 2. Demolish Fence. 100

100

100

Approx. earthworks area (m²)

200

Approx. earthworks volumes (mᶟ)

50

125

10

150

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Normanby Road Early Works

Stage Sub-Stages

Stage 2 (Apr –May 2020)

Demolition of northern boundary fence, kerb and tree removal at 32 Normanby Road. Excavation and installation of south sewer line along Normanby Road.

1.4 –• Installation of permanent stormwater line across Normanby Road.

1.5 –• Installation of south sewer manhole and tie in to existing sewer line along Normanby Road.

1.6 –• Installation of permanent stormwater line across Normanby Road.

1.7 –• Installation of permanent stormwater line and catch pits at 32 Normanby Road. • Installation of private stormwater connections at 32 Normanby Road.

1.8 –• Regrade car park area at 32 Normanby Road in stages.

2.1 –• Construction of piling platform and piling for the temporary bridge at 32 Normanby Road. • Installation of permanent north sewer line across Normanby Road.

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Normanby Road Early Works

Construction sequence of works

3. Dig out roots. 4. Place clean aggregate working surface.

1. Cut seal. 2. Excavate trench. 3. Install pipes and Manholes. 4. Backfill and compact trench. 5. Reinstate road and footpaths.

1. Cut seal. 2. Excavate trench. 3. Install pipes and Manholes. 4. Backfill and compact trench. 5. Reinstate road and footpaths.

1. Cut seal. 2. Excavate trench. 3. Install pipes and Manholes. 4. Backfill and compact trench. 5. Reinstate road and footpaths.

1. Cut seal. 2. Excavate trench. 3. Install pipes and Manholes. 4. Backfill and compact trench. 250

Approx. earthworks area (m²)

20

40

140

1. Strip seal. 2. Fill aggregate in layers and compact.

1. Level aggregate platform. 2. Compact.

1. Deliver piling rig. 2. Drill piles. 3. Concrete piles. 4. Remove piling rig. 1200

80

1. Excavate trench. 2. Install pipes and Manholes. 3. Backfill and compact trench.

1. Construct formwork. 20

Approx. earthworks volumes (mᶟ)

500

40

130

300

0

180

120

Stage Sub-Stages

Stage 3 (Apr –Jul 2020)

Stage 4 (Aug –Sept 2020)

Construction of pile cap, removal of piling platform and installation of permanent stormwater line at 32 Normanby Road. Construction of piling platform and piling for the temporary bridge at 14-22 Boston Road.

2.3 –• Construction of pile cap and removal of piling platform at 14-22 Boston Road. • Reinstatement of car park surface and line marking at 32 Normanby Road.

2.4 –• Removal of temporary car park at 14-22 Boston Road. • Installation of permanent north sewer line across 14-22 Boston Road, 11 Water Street 8-10 Boston Road and the road reserve of Water Street.

3.1 –• Construction of a retaining wall at the south-western corner of the Normanby Road / Boston Road / Nugent Street roundabout. • Construction of temporary bridge foundations at 14-22 Boston Road and 32 Normanby Road.

3.2 –• Installation of span columns and span truss across the NAL rail corridor. • Installation of temporary utilities on span columns.

4.1 –• Installation of temporary gas, water, power and communication lines from the

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Construction sequence of works

2. Tie steel. 3. Pour concrete. 4. remove formwork.

1. Deliver piling rig. 2. Drill piles. 3. Concrete piles. 4. Remove piling rig.

1. Construct formwork. 2. Tie steel. 3. Pour concrete. 4. Remove formwork.

1. Level Aggregate. 2. Compact. 3. Reseal. 4. Line mark carpark.

1. Excavate trench. 2. Install pipes and Manholes. 3. Backfill and compact trench.

1. Clear area. 2. Prepare foundation. 3. Build wall. 4. Backfill behind wall. 5. Compact Backfill. 150

1. Set up for Night works. Stop Trains. 2. Lift columns and secure in place. 3. Lift span and secure in place. 4. lift utilities and secure in place.

140

350

1. Excavate Trench. 2. Install Utilities. 3. Connect Utilities. 4. Backfill and Compact Trench. 0

Approx. earthworks area (m²)

80

Approx. earthworks volumes (mᶟ)

300

500

250

0

150

Stage Sub-Stages Construction sequence of works

temporary bridge to existing lines. Installation of screens on the temporary bridge. 5. Reinstate Road and Footpath. 6. Lift screens into place. 7. Bolt screens.

Approx. earthworks area (m²)

Approx. earthworks volumes (mᶟ)

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