Pile Design and Construction Practice, Fifth edition

126 Piling equipment and methods broken rock can be removed by lowering the airlift device shown in Figure 3.39 down the tube, t ...

small-diameter holes in the clay. Equipment has yet to be devised which will quickly and effectively remove the clay adhering to ...

The procedures to be adopted for avoiding ‘waisting’or ‘necking’of the shaft, or the inclusion of silt pockets and laitance laye ...

Piling equipment and methods 129 to the walls of the borehole or to the lining tubes should be cleaned off. The reinforcing cage ...

require ramming or vibrating. The mix proportions should be such as to ensure compliance with the requirements regarding strengt ...

The reader is referred to the ICE Specificationfor the various qualifications to the above tolerances. It will be noted that the ...

132 Piling equipment and methods (3) The falling concrete may jam between the reinforcing bars and not flow outwards to the wall ...

the ground with limited crowd applied, although for less cohesive soil more thrust will be necessary to reach the required depth ...

concrete by tremie pipe. This is because the water in a bored pile is rarely clean, and the silt stirred up by dumping the aggre ...

Piles drilled by tripod rigs are relatively small in diameter, requiring extra care when placing the concrete as this is more li ...

The American Concrete Institute(6.13)recommends using an over-sanded mix for placing concrete in raking pile shells or tubes. A ...

Piling equipment and methods 137 vertical is 1 in 75. Maximum deviation of finished pile from the specified rake is 1 in 25 for ...

3.10WILLIAMS, N. S. Contribution to discussion on pile driving in difficult conditions, Institution of Civil Engineers, Works Co ...

Chapter 4 Calculating the resistance of piles to compressive loads 4.1 General considerations 4.1.1 The basic approach to the ca ...

pile group under its working load, any calculations of the transfer of load that are based on elastic theory which do not take a ...

Resistance of piles to compressive loads 141 be in the range of 10% to 20% of the base diameter. When the stage of full mobiliza ...

The concept of the separate evaluation of shaft friction and base resistance forms the basis of all ‘static’calculations of pile ...

and clays, has shown that if safety factor of 2.5 is taken on the ultimate resistance then the settlement of the pile head at th ...

Serviceability limit statesare concerned with ensuring that the deformations of a structure due to ground movements below the fo ...

for spread foundations in various classes of soils and rocks such as Table 1 of BS8004. Similar tables are not generally availab ...