Chef de projet : NOM Prnom - Repositório Aberto da Universidade ...
Chef de projet : NOM Prnom - Repositório Aberto da Universidade ...
Chef de projet : NOM Prnom - Repositório Aberto da Universidade ...
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Premier Symposium Méditerranéen <strong>de</strong> Géoengineering «SMGE09» Alger 20 et 21 juin 2009<br />
Table 6. Deflections obtained with PLAXIS ® .<br />
Hypotheses<br />
Deflections [μm]<br />
Df 1 Df 2 Df 3 Df 4 Df 5 Df 6 Df 7 Df 8 Df 9<br />
1 118 66 44 35 24 16 10 6 3<br />
2 156 88 57 44 27 17 10 6 3<br />
3 101 53 34 26 17 11 7 5 3<br />
4 76 49 33 26 17 11 7 5 3<br />
5 90 60 40 30 18 11 7 4 3<br />
6 177 83 45 32 18 10 6 4 3<br />
7 92 45 26 19 12 8 6 4 3<br />
Figure 6 shows the <strong>de</strong>flection basins obtained taking into account the various hypotheses. The<br />
same figure also shows the <strong>de</strong>flections of three FWD tests (20 kN load) performed in situ during<br />
one of the campaigns (Pk3+750, Pk3+875, Pk3+975).<br />
Figure 6. Deflection basins obtained through numerical mo<strong>de</strong>ling and in situ test campaign.<br />
From the analysis of results, it is possible to conclu<strong>de</strong> that the layers of lime treated soil can<br />
present values of the <strong>de</strong>formation modulus ranging from 300 to 600 MPa. The equivalent<br />
<strong>de</strong>formation modulus calculated using the maximum <strong>de</strong>flection obtained at the Pk3+750 test<br />
(210 μm) is 200 MPa. This value is higher than the one specified in the <strong>de</strong>sign (120 MPa).<br />
4. CONCLUSIONS<br />
The use of lime treated soils during the construction of the substructure of road pavements is an<br />
ancient technique, yet not common in transportation infrastructure construction practice in<br />
Portugal. Nevertheless, during the construction of the two highways that technical solution was<br />
applied. The falling weight <strong>de</strong>flectometer equipment was used to perform in situ tests.<br />
The use of numerical analysis of obtained results allowed to estimate the values of the<br />
<strong>de</strong>formation modulus of the lime treated capping layer. It was observed that the values of the<br />
<strong>de</strong>formation modulus obtained are higher than the pre-established ones.