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Volume 6 – Geotechnical Manual, Site Investigation and Engineering ...

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Chapter 1 PLANNING AND SCOPE<br />

2L<br />

H<br />

Dams/Reservoirs/<br />

Levees<br />

D<br />

D = Impermeable Stratum or Bedrock, or Not less than 2 x maximum hydraulic head expected, or ½<br />

H- 2H<br />

B<br />

B<br />

L<br />

Unit load<br />

P<br />

Total load<br />

P=P.L.B.<br />

L<br />

L1<br />

B1<br />

P1<br />

S1<br />

S1<br />

Foundation<br />

Structure<br />

D<br />

MAT OR SINGLE FOOTING<br />

S<br />

S<br />

GROUP OF FOOTINGS<br />

D = 2B (square) to 6B (strip)<br />

D<br />

D<br />

Roads/<br />

Farm Roads<br />

(i) Roads: At least 5m below finished road level (near existing ground <strong>and</strong> in cut<br />

(ii) Farm Roads: D = 1m to 2m (light traffic); 2m to 3m (heavy traffic)<br />

Figure 1.3 (a)<br />

March 2009 1-11

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