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Effectiveness of a vertical micropile system in mitigating the liquefaction-induced lateral spreading effects on pile foundations: 1 g large-scale shake table tests.
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- معلومة اضافية
- نبذة مختصرة :
Liquefaction-induced lateral spreading caused severe damages to pile foundations during past earthquakes. Micropiles can be used as a mitigation strategy against lateral spreading effects on pile foundations. However, the available knowledge about the possible efficiency of this strategy is quite limited. In this regard, the present study aims to evaluate the effectiveness of a vertical micropile system as a lateral spreading countermeasure using large-scale 1 g shake table tests on 3 3 pile groups. The results showed that the micropile system was not able to effectively reduce the bending moments in piles; however, it considerably reduced the lateral soil pressures exerted on the upslope piles of the group by the upper non-liqueable layer. The employed micropiles restricted the lateral displacement of the upper non-liqueable layer and, partially, that of the liqueable layer, especially at upper depths. Several solutions were offered to enhance their performance including increasing the number of micropiles with a tighter pattern and using stiffer micropiles or fixing them in the underlying non-liqueable layer. [ABSTRACT FROM AUTHOR]
- نبذة مختصرة :
Copyright of Scientia Iranica. Transaction A, Civil Engineering is the property of Scientia Iranica and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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