Pile Design and Construction Practice, Fifth edition

described in Section 9.4. Floating ice on lakes and rivers can jam between piles in groups causing them to lift when water level ...

obtained from a simple triangle of forces as shown. Where lateral forces are transient in character, for example, for wind loadi ...

6.2 Uplift resistance of piles 6.2.1 General The simplest method of restraining piles against uplift is to employ a pile shaft t ...

resistance of cylindrical augered footings and a 30% to 50% reduction in belled footings in clay when sustained loads were carri ...

Two modes of failure are to be examined: (1) The pull-out of the pile from the ground mass and (2) Uplift of a block of ground c ...

in the ground is assumed to be equal to that of the volume of soil it displaces. If the weight of the block of soil is calculate ...

Because buoyancy is a destabilizing factor, EC7 (Clause 2.4.7.4) requires verification of stability by the UPL criteria as given ...

Section 3.3.1. Enlargements cannot be formed in coarse soils unless the borehole is drilled with the support of a bentonite slur ...

If equation 6.5 is adapted to a pile with an enlarged base the weight of the pile is taken in conjunction with the weight of the ...

The shaft length is taken as the overall depth of the pile, from which the depth of the enlargement and any allowance made for t ...

medium transferring the uplift load from the pile on to the anchor. Where large uplift loads are carried, the transfer of load i ...

(2) The allowable bond stress between the anchor and the grout (3) The allowable bond stress between the grout and the rock (4) ...

diameter of the anchor and the influence of the bottom compression fitting in short anchors. The anchor diameter is of significa ...

where mis the modular ratio of steel to grout (take conservatively as 18 in absence of other data for long term, i.e. 28 days or ...

For design environmental conditions with dead loads and maximum or minimum live loads appropriate for combining with extreme con ...

The pull-out resistance of the mass of rock (as shown in Figure 6.12b) is the final criterion of the performance of an individua ...

322 Piles to resist uplift and lateral loading (a) (b) (c) (d) Figure 6.13Pull-out failure in rock anchors (a) Horizontally bedd ...

The calculation of the volume of rock Vcin a single cone with a half-angle of 30 at various angles of inclination  to a horizon ...

In addition to dealing with the use of anchorages for restraining uplift on structures, EC7 (Section 8) makes recommendations co ...

(3) loss of anchorage force by excessive displacement of the anchor head or by creep and relaxation (4) failure or excessive dis ...