ABSTRACT
EARTH RETENTION AND STABILIZATION The following prices have been assembled from the relevant items in the unit costs section. They are intended to give a broad overall price or help in comparisons between a number of basic construction procedures These approximate estimates are for construction only. They do not include for preliminaries, design/supervision costs, land purchase or OH&P etc. Prices in this section are based on the same information and outputs as used in the unit costs section. Costs per m² or m³ of completed structure
Reinforced in situ concrete retaining wall including excavation; reinforcement; formwork; expansion joints; granular backfill and 100mm land drain; profiled formwork finish to one side typical retaining wall, allowing for profiling finishes
1.0m high m² 490.00 to 570.00 3.0m high m² 440.00 to 500.00 6.0m high m² 520.00 to 600.00 9.0m high m² 580.00 to 670.00
Precast concrete block, earth retaining wall including granular fill; earth anchors and proprietary units or concrete panels, strips, fixings and accessories (Reinforced Earth)
1.5m high m² 370.00 to 430.00 3.0m high m² 340.00 to 390.00 6.0m high m² 370.00 to 430.00
Precast, reinforced concrete unit retaining wall (in situ foundation): including excavation and fill; reinforced concrete foundation; precast concrete units, joints
1.0m high m² 450.00 to 520.00 2.0m high m² 460.00 to 530.00 3.0m high m² 480.00 to 560.00
EARTH RETENTION AND STABILIZATION – cont
Precast concrete crib wall including excavation; stabilization and foundation work
up to 1.0m high m² 300.00 to 340.00 up to 1.5m high m² 290.00 to 330.00 up to 2.5m high m² 290.00 to 330.00 up to 4.0m high m² 270.00 to 310.00
Timber crib walling including preparation; excluding anchoring
up to 1.5m high m² 145.00 to 165.00 up to 3.7m high m² 185.00 to 210.00 up to 5.9m high m² 230.00 to 260.00 up to 7.4m high m² 265.00 to 305.00
Rock gabions including preparation; excluding anchoring
1.0m thick m2 79.00 to 91.00
BRIDGEWORKS
ROAD BRIDGES per m² of deck maximum span between piers or abutments; include for the works described to the bridge decks and abutments, but exclude any approach works
Reinforced in situ concrete viaduct including excavation; reinforcement; formwork; concrete; bearings; expansion joints; deck waterproofing; deck finishings; P1 parapet
span: 15m m² 2025.00 to 4200.00 span: 20m m² 1925.00 to 4000.00 span: 25+ m m² 1875.00 to 3900.00
Reinforced concrete bridge with precast beams including excavation; reinforcement; formwork; concrete; bearings; expansion joints; deck waterproofing; deck finishings; P1 parapet
span: 12m m² 2425.00 to 3650.00 span: 17m m² 2275.00 to 3400.00 span: 22m m² 2175.00 to 3250.00 span: 30+ m m² 2075.00 to 3100.00
Reinforced concrete bridge with prefabricated steel beams including excavation; reinforcement; formwork; concrete; bearings expansion joints; deck waterproofing; deck finishings; P1 parapet
span: 20m m² 2075.00 to 4850.00 span: 30m m² 1950.00 to 4600.00 span: 40m m² 1900.00 to 4450.00
FOOTBRIDGES per m² of deck maximum span between piers or abutments; include for the works described to the bridge decks and abutments, but exclude any approach works
Reinforced in situ concrete with precast beams widths up to 6m² of deck; including excavation; reinforcement; formwork; concrete; bearings expansion joints; deck waterproofing; deck finishings; P6 parapet; maximum span between pirers or abutments per m2 of deck
span: 5m m² 2250.00 to 5300.00 span: 10m m² 2175.00 to 5100.00 span: 20+ m m² 2150.00 to 5000.00
Structural steel bridge with concrete foundations width up to 4m wide per m² of deck
span: 10m m² 2125.00 to 2800.00 span: 12m m² 2100.00 to 2800.00 span: 16m m² 2100.00 to 2800.00 span: 20m m² 2200.00 to 2800.00
Timber footbridge (stress graded with concrete piers) per m² of deck width up to 2m wide per m² of deck
span: 12m m² 1175.00 to 1325.00 span: 18m m² 1175.00 to 1350.00
TUNNELLING FIELD COSTS The following have been extracted from costs recorded on historical projects and are indicative of the costs expected in constructing larger diameter tunnels. All up as constructed cost based on 60m2 to 90m2
tunnels The following exclude the cost of land, wayleaves, portals, vent shafts, etc., and are an indication of the order of magnitude expected but actual costs are dependent on ground conditions, location and ease of access, etc. Rock tunnels; 75m² face
maximum m3 315.00 to 385.00 median m3 260.00 to 320.00 lowest m3 210.00 to 250.00 maximum km 23400000.00 to 28600000.00 median km 19800000.00 to 24200000.00 lowest km 15300000.00 to 18700000.00
Soft ground bored tunnel maximum m3 840.00 to 1025.00 median m3 790.00 to 960.00 lowest m3 730.00 to 890.00 maximum km 11700000.00 to 14300000.00 median km 10800000.00 to 13200000.00 lowest km 9900000.00 to 12100000.00
HIGHWAY WORKS
The following prices are the approximate costs per metre run of roadway, and are based on information from a number of sources including engineers estimates, tenders, final account values etc. on a large number of highways contracts. Motorway and All Purpose Road prices include for earthworks, structures, drainage, pavements, line markings, reflective studs, footways signs, lighting, motorway communications, fencing and barrier works as well as allowance for accommodation works, statutory undertakings and landscaping as appropriate to the type and location of the carriageway. Motorway and All Purpose Road prices do NOT include for the cost of associated features such as side roads, interchanges, underbridges, overbridges, culverts, subways, gantries and retaining walls. These are shown separately beside the cost range for each road type, based on statistical frequency norms.
