Geotechnical design report

A geotechnical design report should be produced for each project, even if it is only a single sheet. The report should contain details of the site, interpretation of the ground investigation report, geotechnical design recommendations and advice on supervision, monitoring and maintenance of the works. It is likely that this report will require input from more than one consultant, depending on whether the project is in Geotechnical Category 1, 2 or 3.

The foundation design recommendations should include bearing resistances and characteristic values for soil parameters. It should also clearly state whether the values are applicable to SLS or ULS and whether they are for Combination 1 or Combination 2.

Table 4

Design values of actions derived for UK design, EQU ultimate limit state - persistent and transient design situations

Table 4

Design values of actions derived for UK design, EQU ultimate limit state - persistent and transient design situations

Combination

Expression reference

Permanent actions

Leading variable action

Accompanying variable actions

Unfavourable

Favourable

Main (if any)

Others

Exp. (6.10)

1.1 Gka

0.90 Gka

1.5b Qt

-

1.5C Co,i c Qk,i

a Where the variation in permanent action is not considered significant Gk, j, sup and Gk, j, inf may be taken as Gk b Where the action is favourable, gq, i = 0 and the variable actions should be ignored c The value of C can be obtained from Table NA.A1.1 of the UK NA to BS EN 1990

a Where the variation in permanent action is not considered significant Gk, j, sup and Gk, j, inf may be taken as Gk b Where the action is favourable, gq, i = 0 and the variable actions should be ignored c The value of C can be obtained from Table NA.A1.1 of the UK NA to BS EN 1990

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