A numerical assessment of the efficiency of partial saturation as a countermeasure against lique faction-induced uplift of tunnels
[ X ]
Tarih
2024
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Taylor and Francis
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Tunnels located in liquefiable soils are prone to flotation following earthquakes. When the shaking-induced pore water pressure buildup continues, saturated soil surrounding the tunnels liquefies, flotation occurs and the soil loses its shear resistance against the uplift force from the buoyancy of the tunnel. Mitigation of liquefaction-induced uplift of tunnels is one of the concerns of geotechnical engineers. This article aims to investigate the efficacy of the available mitigation techniques using a finite element program with an emphasis on the prediction of excess pore water pressures in the surrounding soil and the uplift of the tunnel. In addition to the conventional techniques, a newly developed technique "Partial Saturation" was modeled to examine its effect on the reduction of the tunnel uplift. A parametric study was done to compare the effectiveness of partial saturation with other mitigation techniques. Results showed that the partial saturation technique would effectively dissipate the excess pore water pressure in the soil around the tunnels. It also performs well in the reduction of the uplift of the tunnel. The most appealing advantage of this technique against the other available mitigation techniques is that it can be employed easily without disturbing the soil around the tunnels. A new methodology to numerically simulate the partially saturated sands was described in this paper.
Açıklama
Anahtar Kelimeler
Partial saturation, Liquefaction, Tunnel, Uplift, Numerical modeling, PLAXIS2D
Kaynak
Journal of Earthquake Engineering
WoS Q Değeri
Q2
Scopus Q Değeri
Q1
Cilt
Sayı
Künye
Al-Khateeb, S. D. A., Issa, M. J. K., Seyedi, M. (2024). A numerical assessment of the efficiency of partial saturation as a countermeasure against lique faction-induced uplift of tunnels. Journal of Earthquake Engineering. 10.1080/13632469.2024.2434528
