Pile Design and Construction Practice, Fifth edition

This is because a hammer blow acting on top of the pile causes the tube to expand and push out the soil at the instant of striki ...

Piling equipment and methods 107 plate augers by spinning them after withdrawal from the hole and from buckets either by spinnin ...

108 Piling equipment and methods drives respectively; maximum depth with mechanical drive is 102 m at 2500 mm diameter using max ...

Piling equipment and methods 109 Figure 3.27‘Flydrill 5500’ with bucket auger removing spoil from 4.75 m dia monopiles at the Ba ...

Table 3.6Some hydraulic self-erecting crawler boring rigs Maker Type Standard Main Maximum Typical Maximum stroke winch diameter ...

Piling equipment and methods 111 Various types of equipment are available for use with rotary augers. The standard and rock auge ...

Hinged cutters Profile of completed base Housing Borehole casing Kelly (a) (b) Figure 3.28Types of drilling tools (a) Standard a ...

Piling equipment and methods 113 Figure 3.30Top-hinged under-reaming bucket. rams attached to the clamps enable the casing to be ...

114 Piling equipment and methods 24 m deep at a 1 in 4 rake, but difficulties can occur when extracting the casing during concre ...

Piling equipment and methods 115 Figure 3.32Numa hammer with extending under-reaming drill bit for simultaneously drilling and i ...

116 Piling equipment and methods 3.3.5 Reverse-circulation drilling rigs Reverse-circulation drilling rigs operate on the princi ...

Piling equipment and methods 117 drilling 4000 mm diameter holes with a drill string weighing 130 tonne. The largest Teredo rig, ...

118 Piling equipment and methods purpose-built crawlers and excavate a square hole, Ell-, Tee-, or rectangular slots under bento ...

Piling equipment and methods 119 prised out by spade when the cutter is raised to the surface. Drilling is effected in coarse-gr ...

accompanied by settlement of the ground surface around the pile borehole. Rocks are drilled by chiselling and using a baler to r ...

slurry which is adequate to smear the wall of the borehole and give it the necessary short-term support. After drilling with thi ...

122 Piling equipment and methods lowered to the bottom of the borehole. A flexible metal sheet covers the whole of the underside ...

Piling equipment and methods 123 Similar base grouting techniques were used at six sites in the Docklands area of London beneath ...

not occur, or when 1000 litres of fluid had been injected to limit hydrofracture of the soil below the gravel. Shaft grouting of ...

Care should be taken to prevent damage to the creosote protection by avoiding the use of slings or hooks which gouge the pile de ...