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首页> 外文期刊>Ground improvement >Field tests of laterally loaded flexible piles in soil with top cement-treated layers
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Field tests of laterally loaded flexible piles in soil with top cement-treated layers

机译：顶部水泥处理层的侧向荷载柔性桩的现场测试

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A series of laterally loaded tests on flexible piles inserted in bonded residual soil was conducted. To evaluate the main aspects of shaft mobilisation under lateral loading, a series of tests was performed under two different pile configurations: in naturally bonded residual soil and in artificially top cemented sand layers reinforcing the naturally bonded residual soil. The length to diameter ratio (LID) of the piles was selected as 20, representing the behaviour of a free-headed, flexible pile. The size of the cylindrical cement-treated sand layers around the pile ranged from 2 D to 4D and 0.1L to 0.3L. The treated layer was a mixture of Osorio sand and early-strength Portland cement. Experimental results showed a significant increase in the lateral load performance of flexible piles when the top soil layer was treated with cement. The ultimate lateral load capacity (H_(ult)) increased six fold - from about 50 kN in naturally bonded residual soil to around 300 kN in artificially cemented sand layers embedded in naturally bonded residual soil, and a considerable reduction of the displacements measured at the pile head was observed.
机译：在插入粘结的残余土壤中的柔性桩上进行了一系列侧向荷载试验。为了评估侧向荷载作用下竖井动员的主要方面，在两种不同的桩配置下进行了一系列测试：在天然粘结的残留土中和在人工顶置的水泥砂层中增强了天然粘结的残留土。桩的长径比（LID）选择为20，代表自由头的柔性桩的行为。桩周围的圆柱形水泥砂处理层的尺寸范围为2 D至4D和0.1L至0.3L。处理过的层是奥索里奥砂和早强硅酸盐水泥的混合物。实验结果表明，当顶层土层用水泥处理时，柔性桩的侧向荷载性能显着提高。极限侧向承载能力（H_（ult））增加了六倍-从天然粘结残余土中的约50 kN增至埋在天然粘结残余土中的人工胶结砂层中的约300 kN，并显着降低了土体的位移观察到桩头。

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