ABSTRACT
Moving piling plant for 235× 235mm precast reinforced and prestressed concrete piles in main piling – – – – nr 50.00 275× 275mm precast reinforced and prestressed concrete piles in main piling – – – – nr 50.00 350× 350mm precast reinforced and prestressed concrete piles in main piling – – – – nr 55.00
Bored in situ reinforced concrete piling (tripod rig) Establishment of piling plant for 500mm dia. cast-in-place concrete piles (tripod rig) in main piling – – – – item 6961.50 Moving piling plant for 500mm dia. cast-in-place concrete piles (tripod rig) in main piling – – – – nr 178.50
hours £ £ £ rate £
PILING PLANT – cont
Bored in situ reinforced concrete piling (mobile rig) Establishment of piling plant for 500mm dia. cast-in-place concrete piles (mobile rig) in main piling – – – – item 15300.00 Moving piling plant for 500mm dia. cast-in-place concrete piles in (mobile rig) main piling – – – – nr 144.33
Concrete injected piles (continuous flight augered) Establishment of piling plant for cast-in-place concrete piles (CFA) in main piling
450mm dia.; 650 kN – – – – item 8150.00 600mm dia.; 1400 kN – – – – item 8150.00 750mm dia.; 2200 kN – – – – item 8150.00
Moving piling plant for cast-in-place concrete piles (CFA) in main piling
450mm dia.; 650 kN – – – – nr 40.00 600mm dia. 1400 kN – – – – nr 40.00 750mm dia. 2200 kN – – – – nr 40.00
Driven cast in place piles; segmental casing method Establishment of piling plant for cast-in-place concrete piles in main piling – – – – item 11730.00 Moving piling plant for cast-in-place concrete piles in main piling – – – – nr 25.50 Establishment of piling plant for cast-in-place concrete piles in main piling
bottom driven – – – – item 6000.00 top driven – – – – item 6000.00
Moving piling plant for 430mm dia. cast-in-place concrete piles in main piling
bottom driven – – – – nr 90.76 top driven – – – – nr 62.80
Steel bearing piles Establishment of piling plant for steel bearing piles in main piling
maximum 100miles radius from base – – – – item 4590.00 maximum 250miles radius from base – – – – item 10200.00
Moving piling plant for steel bearing piles in main piling – – – – nr 66.30
Z section sheet steel piles Provision of all plant, equipment and labour including transport to and from the site and establishing and dismantling for
driving of sheet piling – – – – item 7250.00 extraction of sheet piling – – – – item 1800.00
hours £ £ £ rate £
U section sheet steel piles Provision of plant, equipment and labour including transport to and from the site and establishing and dismantling for
driving of sheet piling – – – – item 6600.00 extraction of sheet piling – – – – item 5600.00
Establishment of piling plant for steel tubular piles in main piling
maximum 100miles radius from base – – – – item 6800.00 maximum 250miles radius from base – – – – item 17000.00
Moving piling plant for steel tubular piles in main piling – – – – nr 250.00
PRECAST CONCRETE PILES
Driven precast reinforced concrete piles The following unit costs cover the installation of driven precast concrete piles by using a hammer acting on a shoe fitted onto or cast into the pile unit. The costs are based installing 100 piles of nominal sizes stated, and a concrete strength of 50N/mm² suitably reinforced for a working load not exceeding 600 kN, with piles average 15m long, on a clear site with reasonable access. Single pile lengths are normally a maximum of 13m long, at which point, a mechanical interlocking joint is required to extend the pile. These joints are most economically and practically formed at works. Lengths, sizes of sections, reinforcement details and concrete mixes vary for differing contractors, whose specialist advice should be sought for specific designs. Precast concrete piles; concrete 50N/mm²
235× 235mm; 5-10m in length; main piling – – – – m 25.50 275× 275mm; 5-10m in length; main piling – – – – m 25.50 350× 350mm; 5-10m in length; main piling – – – – m 45.90
Mechanical Interlocking joint 235× 235mm – – – – nr 61.20 275× 275mm – – – – nr 63.75 350× 350mm – – – – nr 122.40
Driving vertical precast piles 235× 235mm; 5-10m in length; in main piling – – – – m 3.31 275× 275mm; 5-10m in length; in main piling – – – – m 3.83 350× 350mm; 5-10m in length; in main piling – – – – m 4.59
Stripping vertical precast concrete pile heads 235× 235mm piles in main piling – – – – nr 34.17 275× 275mm piles in main piling – – – – nr 45.90 350× 350mm piles in main piling – – – – nr 66.81
Standing time 275× 275mm – – – – hr 178.50 350× 350mm – – – – hr 178.50
hours £ £ £ rate £
CAST IN PLACE PILES
Bored in situ reinforced concrete piling (tripod rig) The following unit costs cover the construction of small dia. bored piling using light and compact tripod rigs requiring no expensive site levelling or access ways. Piling can be constructed in very restricted headroom or on confined and difficult sites. Standard dia.s are between 400 and 600mm with a normal maximum depth of 30m. The costs are based on installing 100 piles of 500mm nominal dia., a concrete strength of 20N/ mm² with nominal reinforcement, on a clear site with reasonable access. Disposal of excavated material is included separately. Vertical 500mm dia. cast-in-place piles; 20N/mm² concrete; nominal reinforcement; in main piling – – – – m 193.80 Vertical 500mm dia. empty bores in main piling – – – – m 40.80 Add for boring through obstructions – – – – hr 96.90 Standing time – – – – hr 117.30
Bored in situ reinforced concrete piling (mobile rig) The following unit costs cover the construction of small dia. bored piles using lorry or crawler mounted rotary boring rigs. This type of plant is more mobile and faster in operation than the tripod rigs and is ideal for large contracts in cohesive ground. Construction of piles under bentonite suspension can be carried out to obviate the use of liners. Standard dia.s of 450 to 900mm dia. can be constructed to depths of 30m. The costs are based on installing 100 piles of 500mm nominal dia., a concrete strength of 20N/ mm² with nominal reinforcement, on a clear site with reasonable access. Disposal of excavated material is included separately. Vertical 500mm dia. cast-in-place piles; 20N/mm² concrete; nominal reinforcement – – – – m 127.50 Vertical 500mm dia. empty bores – – – – m 56.10 Add for boring through obstructions – – – – hr 459.00 Standing time – – – – hr 357.00
hours £ £ £ rate £
Concrete injected piles (continuous flight augered) The following unit costs cover the construction of piles by screwing a continuous flight auger into the ground to a design depth (Determined prior to commencement of piling operations and upon which the rates are based and subsequently varied to actual depths). Concrete is then pumped through the hollow stem of the auger to the bottom and the pile formed as the auger is withdrawn. Spoil is removed by the auger as it is withdrawn. This is a fast method of construction without causing disturbance or vibration to adjacent ground. No casing is required even in unsuitable soils. Reinforcement can be placed after grouting is complete. The costs are based on installing 100 piles on a clear site with reasonable access. Disposal of excavated material is included separately. Vertical cast-in-place piles; 20N/mm² concrete
450mm dia.; 650 kN; 10-15m in length; main piling – – – – m 21.78 600mm dia.; 1400 kN; 10-15m in length; main piling – – – – m 51.00 750mm dia.; 2200 kN; 10-15m in length; main piling – – – – m 55.59
Vertical empty bores 450mm dia. – – – – m 26.37 600mm dia. – – – – m 26.67 750mm dia. – – – – m 31.11
Standing time/Boring through obstructions time 450mm dia. – – – – hr 350.00 600mm dia. – – – – hr 350.00 750mm dia. – – – – hr 350.00
DRIVEN CAST-IN-PLACE PILES
Driven cast-in-place piles; segmental casing method The following unit costs cover the construction of piles by driving into hard material using a serrated thick wall tube. It is oscillated and pressed into the hard material using a hydraulic attachment to the piling rig. The hard material is broken up using chiselling methods and is then removed by mechanical grab. Vertical cast-in-place piles; 20N/mm2 concrete
620mm dia.; 10-15m in length; main piling – – – – m 173.40 1180mm dia.; 10-15m in length; main piling – – – – m 188.70 1500mm dia.; 10-15m in length; main piling – – – – m 260.10
Standing time – – – – hr 280.50 Add for driving through obstructions – – – – hr 300.90
hours £ £ £ rate £
DRIVEN CAST-IN-PLACE PILES – cont
Driven in situ reinforced concrete piling The following unit costs cover the construction of piles by driving a tube into the ground either by using an internal hammer acting on a gravel or concrete plug or, as is more usual, by using an external hammer on a driving helmet at the top of the tube. After driving to the required depth an enlarged base is formed by hammering out sucessive charges of concrete down the tube. The tube is then filled with concrete which is compacted as the tube is vibrated and withdrawn. Piles of 350 to 500mm dia. can be constructed with rakes up to 1 in 4 to carry working loads up to 120 t per pile. The costs are based on installing 100 piles of 430mm nominal dia., a concrete strength of 20N/mm² suitably reinforced for a working load not exceeding 750 kN, on a clear site with reasonable access. Establishment of piling plant for cast-in-place concrete piles in main piling
bottom driven – – – – item 8160.00 top driven – – – – item 8160.00
Moving piling plant for 430mm dia. cast-in-place concrete piles in main piling
bottom driven – – – – nr 40.80 top driven – – – – nr 40.80
Vertical 430mm dia. cast-in-place piles 20N/mm² concrete; reinforcement for 750 kN maximum load
bottom driven – – – – m 20.77 top driven – – – – m 20.77
Standing time – – – – hr 178.50 Add for driving through obstructions where within the capabilities of the normal plant – – – – hr 188.70 Stripping vertical concrete pile heads
430mm dia. heads – – – – nr 76.50
REINFORCEMENT FOR CAST-IN-PLACE PILES
Mild steel bars BS 4449; Grade 250 Bar reinforcement nominal size 16mm and under
ne 12m in length 6.74 813.06 138.27 604.25 t 1555.58 Bar reinforcement nominal size 20mm and over; not exceeding 12m in length
20mm nominal size 4.44 535.61 91.09 585.80 t 1212.50 25mm nominal size 4.44 535.61 91.09 585.80 t 1212.50 32mm nominal size 4.44 535.61 91.09 585.80 t 1212.50 40mm nominal size 4.44 535.61 91.09 585.80 t 1212.50
ADD to the above for bars 12-13.5m long – – – 50.00 t 50.00 13.5-15m long – – – 50.00 t 50.00 over 15m long, per 500mm increment – – – 5.00 t 5.00
hours £ £ £ rate £
High yield steel bars BS 4449; deformed, Grade 500C Bar reinforcement nominal size 16mm and under
not exceeding 12m in length 6.74 813.06 138.27 530.00 t 1481.33 Bar reinforcement nominal size 20mm and over not exceeding 12m in length
20mm nominal size 4.44 535.61 91.09 580.00 t 1206.70 25mm nominal size 4.44 535.61 91.09 580.00 t 1206.70 32mm nominal size 4.44 535.61 91.09 580.00 t 1206.70 40mm nominal size 4.44 535.61 91.09 580.00 t 1206.70
ADD to the above for bars 12-13.5m long – – – 50.00 t 50.00 13.5-15m long – – – 50.00 t 50.00 over 15m long; per 500mm increment – – – 5.00 t 5.00
Helical reinforcement nominal size 16mm and under ne 12m in length 6.74 813.06 138.27 604.01 t 1555.34
Helical reinforcement nominal size 20mm and over 20mm nominal size 4.44 535.61 91.09 585.80 t 1212.50 25mm nominal size 4.44 535.61 91.09 585.80 t 1212.50 32mm nominal size 4.44 535.61 91.09 585.80 t 1212.50 40mm nominal size 4.44 535.61 91.09 585.80 t 1212.50
Dowels 16mm dia. × 600mm long 0.10 12.06 2.05 1.74 nr 15.85 20mm dia. × 600mm long 0.10 12.06 2.05 3.16 nr 17.27 25mm dia. × 600mm long 0.10 12.06 2.05 3.62 nr 17.73 32mm dia. × 600mm long 0.10 12.06 2.05 4.43 nr 18.54
STEEL BEARING PILES Steel bearing piles are commonly carried out by a Specialist Contractor and whose advice should be sought to arrive at accurate costing. However the following items can be used to assess a budget cost for such work. The following unit costs are based upon driving 100nr steel bearing piles on a clear site with reasonable access. Supply is based on delivery 75miles from works, in loads over 20 t.
