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 diameter cast-in-place concrete piles (tripod rig) in main piling – – – – item 6825.00 Moving piling plant for 500mm diameter cast-in-place concrete piles (tripod rig) in main piling – – – – nr 175.00
Labour Total hours £ £ £ rate £
Bored in situ reinforced concrete piling (mobile rig) Establishment of piling plant for 500mm diameter cast-in-place concrete piles (mobile rig) in main piling – – – – item 15000.00 Moving piling plant for 500mm diameter cast-in-place concrete piles in (mobile rig) main piling – – – – nr 141.50
Concrete injected piles (continuous flight augered) Establishment of piling plant for cast-in-place concrete piles (CFA) in main piling
450mm diameter; 650 kN – – – – item 8000.00 600mm diameter; 1400 kN – – – – item 8000.00 750mm diameter; 2200 kN – – – – item 8000.00
Moving piling plant for cast-in-place concrete piles (CFA) in main piling
450mm diameter; 650 kN – – – – nr 40.00 600mm diameter 1400 kN – – – – nr 40.00 750mm diameter 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 11500.00 Moving piling plant for cast-in-place concrete piles in main piling – – – – nr 25.00 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 diameter 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 100 miles radius from base – – – – item 4500.00 maximum 250 miles radius from base – – – – item 10000.00
Moving piling plant for steel bearing piles in main piling – – – – nr 65.00
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 7100.00 extraction of sheet piling – – – – item 4750.00
Labour Total hours £ £ £ rate £
PILING PLANT – cont
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 6500.00 extraction of sheet piling – – – – item 5500.00
Establishment of piling plant for steel tubular piles in main piling
maximum 100 miles radius from base – – – – item 6750.00 maximum 250 miles radius from base – – – – item 16750.00
Moving piling plant for steel tubular piles in main piling – – – – nr 248.06
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 25.00 275× 275mm; 5-10m in length; main piling – – – – m 25.00 350× 350mm; 5-10m in length; main piling – – – – m 45.00
Mechanical Interlocking joint 235× 235mm – – – – nr 60.00 275× 275mm – – – – nr 62.50 350× 350mm – – – – nr 120.00
Driving vertical precast piles 235× 235mm; 5-10m in length; in main piling – – – – m 3.25 275× 275mm; 5-10m in length; in main piling – – – – m 3.75 350× 350mm; 5-10m in length; in main piling – – – – m 4.50
Labour Total hours £ £ £ rate £
Stripping vertical precast concrete pile heads 235× 235mm piles in main piling – – – – nr 34.34 275× 275mm piles in main piling – – – – nr 46.13 350× 350mm piles in main piling – – – – nr 67.14
Standing time 275× 275mm – – – – hr 175.00 350× 350mm – – – – hr 175.00
CAST-IN-PLACE PILES
Bored in situ reinforced concrete piling (tripod rig) The following unit costs cover the construction of small diameter 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 diameters are between 400 and 600mm with a normal maximum depth of 30m. The costs are based on installing 100 piles of 500mm nominal diameter, a concrete strength of 20N/mm² with nominal reinforcement, on a clear site with reasonable access. Disposal of excavated material is included separately. Vertical 500mmdiameter cast-in-place piles; 20N/mm² concrete; nominal reinforcement; in main piling – – – – m 190.00 Vertical 500mm diameter empty bores in main piling – – – – m 40.00 Add for boring through obstructions – – – – hr 95.00 Standing time – – – – hr 115.00
Bored in situ reinforced concrete piling (mobile rig) The following unit costs cover the construction of small diameter 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 diameters of 450 to 900mm diameter can be constructed to depths of 30m. The costs are based on installing 100 piles of 500mm nominal diameter, 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 diameter cast-in-place piles; 20N/mm² concrete; nominal reinforcement – – – – m 125.00 Vertical 500mm diameter empty bores – – – – m 55.00 Add for boring through obstructions – – – – hr 450.00 Standing time – – – – hr 350.00
Labour Total hours £ £ £ rate £
CAST-IN-PLACE PILES – cont
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 diameter; 650 kN; 10-15m in length; main piling – – – – m 21.35 600mm diameter; 1400 kN; 10-15m in length; main piling – – – – m 50.00 750mm diameter; 2200 kN; 10-15m in length; main piling – – – – m 54.50
Vertical empty bores 450mm diameter – – – – m 25.85 600mm diameter – – – – m 26.15 750mm diameter – – – – m 30.50
Standing time/Boring through obstructions time 450mm diameter – – – – hr 350.00 600mm diameter – – – – hr 350.00 750mm diameter – – – – 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.
