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Analysis of Post-Liquefaction Axial Capacities of Driven Pile and Drilled Shaft Foundations

机译:打桩桩和钻孔轴基础的液化后轴向承载力分析

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The results presented in this paper were obtained from a large testing program that was conducted to evaluate the post-liquefaction axial load capacities of three drilled shaft and three driven pile foundations constructed at the Turrell Arkansas testing site (TATS), located within the New Madrid Seismic Zone. An increase of side and toe resistances, significant ground and driven piles and drilled shafts top settlements were observed following blasting. This increase and settlements were attributed to the increase of effective stress as the excess porewater pressure dissipated. The liquefaction-induced dragloads that developed, at the neutral plane ranged from 200 to 650 kN. The load and settlement distribution curves for each installed foundation during the application of load to the top of each foundation and after blasting are also discussed. The induced dragloads represented more than 5 and 10% of the total resistance of the drilled shaft and driven pile foundations, respectively.
机译:本文介绍的结果来自一项大型测试计划,该计划旨在评估新马德里内Turrell阿肯色州测试站点(TATS)上建造的三个钻探竖井和三个打桩基础的液化后轴向承载能力地震带。爆破后观察到了侧面和脚趾阻力的增加,大量的地面和打入桩以及竖井顶部的沉降。这种增加和沉降归因于有效压力的增加,因为多余的孔隙水压力消散了。在中性平面上产生的液化引起的阻力在200至650 kN的范围内。还讨论了在将荷载施加到每个基础的顶部以及爆破之后每个已安装基础的荷载和沉降分布曲线。诱导的阻力分别代表钻孔竖井和打入桩基础总阻力的5%和10%以上。

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