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Frictional Pullout Resistance and Settlement Criteria ofReinforced soil system | ||
| Journal of Engineering and Sustainable Development | ||
| Article 1, Volume 13, Issue 2, 2009, Pages 70-85 | ||
| Author | ||
| Hayder. M. Mekkiyah | ||
| Abstract | ||
| An analytical approach, adopted to find the frictional pullout resistance andsettlement of foundations resting on reinforced soil based on the test results of circularfooting and site data from plate bearing tests (PLT) for in-situ testing of (PLT) with adiameter of ( 0.75m) , is summarized. The soil was reinforced using biaxial geomesh. Thesettlement was determined by considering the compatibility of strain (settlement) betweensoil and reinforcement element underneath the foundation. Empirical equations were usedto estimate the settlement either from the superstructure loads or from in-situ plate loadtests on the reinforced soil system, while the frictional pullout resistance of reinforcementcalculated and compared with test results based on the new empirical equation. The studyconcerned two different types of geomesh(CE111 and CE121). It was found that initialhorizontal and vertical movement of the reinforcement is needed to mobilize the reinforcingstrength. Further, the initial settlement at small loads could be avoided when thereinforcement was placed closer to the base of the footing (U<< B/2) and there was animprovement in the bearing capacity value of the footing. When the reinforcement is placedaway from the base of the footing, the initial settlement decreased with a slightimprovement in the bearing capacity compared with that of un-reinforced soil. Nondimensionalfactors were developed for the settlement and frictional pullout resistancebased on the experimental site test results. | ||
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