LI Dayong,ZHANG Yukun,GAO Yufeng,et al.Shear Behavior of Suction Foundation‑Clay Interface under Different Shear Rates[J].Journal of Disaster Prevention and Mitigation Engineering,2022,42(01):231-236.
LI Dayong,ZHANG Yukun,GAO Yufeng,et al.Shear Behavior of Suction Foundation‑Clay Interface under Different Shear Rates[J].Journal of Disaster Prevention and Mitigation Engineering,2022,42(01):231-236. DOI: 10.13409/j.cnki.jdpme.201909017.
Shear Behavior of Suction Foundation‑Clay Interface under Different Shear Rates
Shear tests of suction foundation-clay interface at different shear rates were carried out by using a GDS interface shear tester to explore the installation process. This study is focused on the effect of foundation penetration rate on shear characteristics of suction foundation-clay interface during the penetration process, and the shear characteristics of interface at different shear rates and penetration depths. Test results show that the shear strength of the suction foundation-clay interface increases with the increase in normal stress, but decreases with the increase in shear rate. Moreover, the shear displacement corresponding to the peak strength of the interface is within 1mm and increases with the increase in the normal stress. The interface cohesion increases with the increase in shear rate, while the interface friction angle is opposite. Furthermore, in the shear rate range of 1.0-1.2 cm/min, the increase in interface cohesion becomes the largest. The friction coefficient varies from 0.27 to 0.34, and increases with the decrease in shear rate and decreases with the increase in penetration depth.
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