考虑岩石破碎的嵌岩桩承载机理

王开源 ,  景旭 ,  沈宇鹏 ,  赵小林 ,  徐金翠 ,  李志强

科学技术与工程 ›› 2025, Vol. 25 ›› Issue (15) :6463-6476

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科学技术与工程 ›› 2025, Vol. 25 ›› Issue (15) :6463-6476 DOI: 10.12404/j.issn.1671-1815.2404130
建筑科学

考虑岩石破碎的嵌岩桩承载机理

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Load Bearing Capacity of Rock-socketed Pile Considering Rock Fragmentation

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摘要

为了研究岩石破碎对嵌岩桩承载力的影响,应用统计理论建立了考虑岩石破碎的混凝土-岩石剪切模型。将该模型的计算结果与实验结果对比,验证了该模型的准确性。利用考虑岩石破碎的混凝土-岩石剪切模型和嵌岩桩荷载传递机理,建立了考虑岩石破碎的嵌岩桩荷载传递方程并采用Runge-Kutta法求解。将该方程的计算结果与现场静载实验结果接近对比,验证了该方程的准确性。研究结果表明通过统计理论建立岩石破碎的力学模型是可行的。考虑岩石破碎的嵌岩桩荷载传递方程与现场静载实验结果吻合,可以描述桩-岩相对位移-桩侧摩阻力曲线的屈服变形阶段和应变软化阶段。进行参数敏感性研究,深入分析了岩石破碎对混凝土-岩石剪切机制和嵌岩桩承载机制的影响。

Abstract

In order to study the influence of rock fragmentation on the bearing capacity of rock-socketed pile, a concrete rock-shear model considering rock fragmentation was established using statistical theory. The calculation results of the model were compared with the experimental results to verify the accuracy of the model. Using a concrete rock shear model considering rock fragmentation and the load transfer mechanism of rock-socketed pile, a load transfer equation of rock socketed pile considering rock fragmentation was established and solved using the Runge-Kutta method. The calculation results of the equation were compared with the results of on-site static load experiments, which verified the accuracy of the equation. The research results indicate that it is feasible to establish a mechanical model for rock fragmentation through statistical theory. The load transfer equation of rock socketed pile considering rock fragmentation is consistent with the results of on-site static load experiments, which can describe the yield deformation stage and strain softening stage of the pile-rock relative displacement-pile side friction curve. The parameter sensitivity research was conducted, and the influence of rock fragmentation on the concrete-rock shear mechanism and rock-socketed pile bearing mechanism was conducted in-depth analysis.

关键词

山区高速公路 / 嵌岩桩 / 混凝土-岩石剪切 / 荷载传递方程 / 岩石破碎 / 统计理论

Key words

mountain expressway / rock-socketed pile / concrete-rock shear / load transfer equation / rock fragmentation / statistical theory

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王开源, 景旭, 沈宇鹏, 赵小林, 徐金翠, 李志强. 考虑岩石破碎的嵌岩桩承载机理[J]. 科学技术与工程, 2025, 25(15): 6463-6476 DOI:10.12404/j.issn.1671-1815.2404130
WANG Kai-yuan, JING Xu, SHEN Yu-peng, ZHAO Xiao-lin, XU Jin-cui, LI Zhi-qiang. Load Bearing Capacity of Rock-socketed Pile Considering Rock Fragmentation[J]. Science Technology and Engineering, 2025, 25(15): 6463-6476 DOI:10.12404/j.issn.1671-1815.2404130

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基金资助

中央高校基本科研业务费专项(KCJBZY23003536)

国家自然科学基金(42172291)

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