ABSTRACT
RESOURCES - LABOUR Trial hole gang 1 ganger or chargehand (skill rate 4) 13.32 1 skilled operative (skill rate 4) 13.32 2 unskilled operatives (general) 24.88 1 plant operator (skill rate 3) 16.19 Total Gang Rate / Hour £ 67.71 RESOURCES - PLANT Trial holes 8 tonne wheeled backacter 21.30 3 tonne dumper 9.43 3.7 m3/min compressor, 2 tool 7.18 two 2.4 m3/min road breakers 1.63 extra 50 ft / 15m hose 0.27 plate compactors; vibrating compaction; plate 180kg/600mm 1.74 Total Rate / Hour £ 41.55 TRIAL PITS AND TRENCHES The following costs assume the use of mechanical plant and excavating and backfilling on the same day Trial holes measured by number Excavating trial hole; plan size 1.0 x 2.0 m; supports, backfilling ne 1.0 m deep 0.24 16.25 9.97 - nr 26.22 1.0 - 2.0 m deep 0.47 31.82 19.54 - nr 51.36 over 2.0 m deep 0.53 35.89 22.03 - nr 57.92 Excavating trial hole in rock or similar; plan size 1.0 x 2.0 m; supports, backfilling ne 1.0 m deep 0.28 18.96 11.63 - nr 30.59 1.0 - 2.0 m deep 0.51 34.53 21.20 - nr 55.74 over 2.0 m deep 0.58 39.32 24.10 - nr 63.41 Trial holes measured by depth Excavating trial hole; plan size 1.0 x 2.0 m; supports, backfilling ne 1.0 m deep 0.24 16.27 9.97 - m 26.24 1.0 - 2.0 m deep 0.53 35.93 22.03 - m 57.96 2.0 - 3.0 m deep 0.59 39.99 24.53 - m 64.52 3.0 - 5.0 m deep 0.65 44.06 27.02 - m 71.08 Excavating trial hole in rock or similar; plan size 1.0 x 2.0 m; supports, backfilling ne 1.0 m deep 2.95 199.97 122.58 - m 322.55 1.0 - 2.0 m deep 3.65 247.42 151.66 - m 399.08 2.0 - 3.0 m deep 3.95 267.76 164.13 - m 431.88 3.0 - 5.0 m deep 4.50 305.04 186.96 - m 492.00
Item
Gang hours
Labour £
Plant £
Material £ Unit
Total rate £
Sundries in trial holes Removal of obstructions from trial holes irrespective of depth 1.00 67.79 41.55 - hr 109.33 Pumping; maximum depth 4.0 m minimum 750 litres per hour 0.06 1.30 9.74 - hr 11.03 LIGHT CABLE PERCUSSION BOREHOLES The following costs are based on using Specialist Contractors and are for guidance only. Establishment of standard plant and equipment and removal on completion - - - - sum 543.38 Number; 150 mm nominal diameter at base - - - - nr 46.18 Depth; 150 mm nominal diameter of base in holes of maximum depth not exceeding 5 m - - - - m 19.79 in holes of maximum depth 5 - 10 m - - - - m 22.43 in holes of maximum depth 10 - 20 m - - - - m 29.03 in holes of maximum depth 20 - 30 m - - - - m 34.30 Depth backfilled; selected excavated material - - - - m 1.66 Depth backfilled; imported pulverised fuel ash - - - - m 5.30 Depth backfilled; imported gravel - - - - m 7.91 Depth backfilled; bentonite grout - - - - m 13.18 Chiselling to prove rock or to penetrate obstructions - - - - h 52.76 Standing time of rig and crew - - - - h 46.18 ROTARY DRILLED BOREHOLES The following costs are based on using Specialist Contractors and are for guidance only. Establishment of standard plant and equipment and removal on completion - - - - sum 1855.00 Setting up at each borehole position - - - - nr 165.00 Depth without core recovery; nominal minimum core diameter 100 mm ne 5.0 m deep - - - - m 31.67 5 - 10 m deep - - - - m 31.67 10 - 20 m deep - - - - m 31.67 20 - 30 m deep - - - - m 31.67 Depth with core recovery; nominal minimum core diameter 75 mm ne 5.0 m deep - - - - m 94.97 5 - 10 m deep - - - - m 101.31 10 - 20 m deep - - - - m 107.64 20 - 30 m deep - - - - m 116.34 Depth cased; semi-rigid plastic core barrel liner - - - - m 9.22 Depth backfilled, selected excavated material - - - - m 1.66
Item
Gang hours
Labour £
Plant £
Material £ Unit
Total rate £
SAMPLES From the surface or from trial pits and trenches undisturbed soft material; minimum 200 mm cube - - - - nr 12.80 disturbed soft material; minimum 5 kg - - - - nr 2.85 rock; minimum 5 kg - - - - nr 21.34 groundwater; miniumum 1 l - - - - nr 4.97 From boreholes open tube; 100 mm diameter X 450 mm long - - - - nr 12.80 disturbed; minimum 5 kg - - - - nr 2.85 groundwater; minimum 1 l - - - - nr 4.98 stationary piston - - - - nr 4.98 Swedish foil - - - - nr 21.34 Delft - - - - nr 21.34 Bishop sand - - - - nr 21.34 SITE TESTS AND OBSERVATIONS Groundwater level Standard penetration in light cable percussion boreholes - - - - nr - Vane in borehole Plate bearing in pits and trenches; loading table - - - - nr - in pits and trenches; hydraulic jack and kentledge - - - - nr - California bearing ratio - - - - nr - Mackintosh probe Hand auger borehole mm minimum diameter; 6 m maximum depth - - - - nr - INSTRUMENTAL OBSERVATIONS General Pressure head standpipe; 75 mm diameter HDPE pipe - - - - m 27.84 piezometer - - - - m 41.77 install protective cover - - - - nr 104.40 readings - - - - nr 20.88
Item
Gang hours
Labour £
Plant £
Material £ Unit
Total rate £
LABORATORY TESTS General Classification moisture content - - - - nr 3.96 specific gravity - - - - nr 6.59 particle size analysis by sieve - - - - nr 26.37 particle size analysis by pipette or hydrometer - - - - nr 36.93 Chemical content organic matter - - - - nr 29.00 sulphate - - - - nr 19.78 pH value - - - - nr 6.37 contaminants; Comprehensive - - - - nr 230.64 contaminants; Abbreviated - - - - nr 164.83 contaminants; Mini, Screening - - - - nr 131.86 contaminants; nitrogen herbicides - - - - nr 118.68 contaminants; organophosphorus pesticides - - - - nr 98.90 contaminants; organochlorine pesticides - - - - nr 98.90 Compaction standard - - - - nr 118.67 heavy - - - - nr 118.67 vibratory - - - - nr 131.86 Permeability falling head - - - - nr 52.74 Soil strength quick undrained triaxial; set of three 38 mm diameter specimens - - - - nr 26.37 shear box; peak only; size of shearbox 100 x 100 mm - - - - nr 32.97 California bearing ratio; typical - - - - nr 39.56 Rock strength point load test; minimum 5 kg sample - - - - nr 65.93 PROFESSIONAL SERVICES General Technician - - - - h 25.37 Technician engineer - - - - h 36.21 Engineer or geologist graduate - - - - h 36.21 Chartered - - - - h 50.69 principal or consultant - - - - h 65.18 Visits to the Site technician - - - - nr 25.36 technician engineer / graduate engineer or geologist - - - - nr 36.21 chartered engineer - - - - nr 50.69 principal or consultant - - - - nr 65.18 Overnight stays in connection with visits to the site technician - - - - nr 36.21 technician engineer / graduate engineer or geologist - - - - nr 36.21 Chartered engineer / senior geologist - - - - nr 50.69 principal or consultant - - - - nr 65.18
