Design Process of Deep Soil Mixed Walls for Excavation Support
Design Process of Deep Soil Mixed Walls for Excavation Support
Design Process of Deep Soil Mixed Walls for Excavation Support
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<strong>of</strong> horizontal supports (h). The system stiffness (S) is determined from the wall stiffness and the spacing <strong>of</strong> the horizontal<br />
supports (Fig. 5) as<br />
S =<br />
EI<br />
γ w<br />
h 4<br />
(1)<br />
where E is the modulus <strong>of</strong> elasticity <strong>of</strong> the wall material, I is the moment <strong>of</strong> inertia <strong>of</strong> a unit length <strong>of</strong> the wall, γ w is the unit<br />
weight <strong>of</strong> water, and h is the average spacing between supports. Calculations <strong>of</strong> the factor <strong>of</strong> safety against basal heave are<br />
used to determine an estimate <strong>for</strong> the maximum lateral deflection <strong>of</strong> the wall. Approximate pr<strong>of</strong>iles <strong>of</strong> lateral de<strong>for</strong>mations<br />
and settlement behind the wall can be determined following guidelines presented by Clough et al. (1989).<br />
Figure 2. DSM Wall <strong>Design</strong> Flowchart (After Ruther<strong>for</strong>d, 2004).<br />
International Journal <strong>of</strong> Geoengineering Case Histories ©, Vol. 1, Issue 2, p. 59<br />
http://casehistories.geoengineer.org
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