2. Karangahape Main Works

2.1 Overview of Works

The Karangahape Station main works are described in detail in the CEMP and summarised in Table 2-1 below.

It should be noted that construction of the Mercury Lane and Beresford Square station entrance superstructures and other building units, along with the internal station fit out and public realm reinstatement works will form part of separate DWPs to be prepared in the future prior to the commencement of the respective works.

Table 2-1: Overview of Main Works Construction Activities

Works location

General establishment works

Mercury Lane

Beresford Square

Construction Support Areas Overview of construction activities

• Installation of hoardings and temporary traffic management around active construction zones • Construction of the temporary shaft at Mercury Lane to provide access for tunnel construction. Works will include excavation, piling and construction of the above ground acoustic enclosure surrounding the shaft. • Mining of platform tunnels (likely using a roadheader) from the temporary shaft through to the Beresford Square station box. • Diaphragm wall construction and piling around the perimeter of the Mercury

Lane station box. • Construction of the Mercury Lane station box, involving: - top down construction works - excavation and floor slab construction; and - bottom up construction works - rock breaking and excavation, construction of floor slab construction and rail platforms. • Off-site disposal of excavated material from the temporary shaft construction, mining of platform tunnels and station box construction. • Diaphragm wall construction and piling around the perimeter of the Beresford

Square station box. • Construction of the Beresford Square station box, involving: - top down construction works - excavation and floor slab construction; and - bottom up construction works - rock breaking and excavation, construction of floor slab construction and rail platforms. • Off-site disposal of excavated material from the station box construction.

Continued establishment of Construction Support Areas (CSA) at Beresford Square and Mercury Lane (following on from the establishment works undertaken as part of the early works and authorised by the early works plans). This will include the bentonite plant, water treatment plant and temporary spoil storage areas.

Operation of the Beresford Square and Mercury Lane CSAs.

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Karangahape Station Main Works