层状地基中楔形桩水平向非线性振动响应分析

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (13) : 126-133.

论文

邓淇元，涂文博，刘林芽，张鹏飞，刘柯兴

作者信息 +

Horizontal nonlinear vibration response analysis of tapered pile in layered foundation

DENG Qiyuan, TU Wenbo, LIU Linya, ZHANG Pengfei, LIU Kexing

Author information +

文章历史 +

摘要

楔形桩是一种集施工简便、承载力高等特点的新型路基处理桩型。为进一步完善楔形桩水平振动分析理论以推广其在工程中的应用，基于动力Winkler地基理论，建立楔形桩-土体水平耦合振动非线性分析模型，针对水平简谐荷载作用下层状地基中的楔形桩水平动力响应问题展开研究，并探讨不同桩身长径比对桩土分段的敏感性，研究楔形角和土体分层特性参数对楔形桩水平向非线性动力响应的规律。结果表明：随着楔形角或桩侧土体模量的增大，楔形桩水平动力特性均会得到显著改善；等体积条件下保持桩端半径不变改变桩长较保持桩长不变改变桩端半径时水平动力性能表现更好；桩侧上层土体性质变化对桩顶动力响应影响更加显著。

Abstract

Tapered pile is a new type of pile for foundation treatment with the features of easy construction, high bearing capacity. To further promote the application of tapered piles in engineering, this paper analyzes the dynamic response of tapered piles in layered foundations under horizontal simple harmonic loading. Based on the dynamic Winkler foundation theory, the pile-soil system is discretized into a series of micro-element segments of equal thickness, and the soil on the pile side is simulated as a vertical taper surface as well as a spring and a damper parallel to the taper surface. The sensitivity of different pile length-to-diameter ratios to the number of pile-soil segments was investigated. The results show that the lateral dynamic characteristics of the tapered pile will be significantly improved with the increase of the taper angle or the soil modulus along the pile shaft, and keeping the pile tip radius constant while varying pile length for different taper angles under the fixed-volume condition yields better lateral dynamic impedance than varying pile tip radius and keeping the pile length constant, and the change of the upper soil properties along the pile shaft shows a more significant effect on the dynamic response of the tapered pile.

导出引用

邓淇元，涂文博，刘林芽，张鹏飞，刘柯兴. 层状地基中楔形桩水平向非线性振动响应分析[J]. 振动与冲击, 2024, 43(13): 126-133

DENG Qiyuan, TU Wenbo, LIU Linya, ZHANG Pengfei, LIU Kexing. Horizontal nonlinear vibration response analysis of tapered pile in layered foundation[J]. Journal of Vibration and Shock, 2024, 43(13): 126-133

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