PHC管桩水平承载力试验研究

发布时间：2018-03-21 09:46

本文选题：PHC管桩　切入点：单桩水平承载力　出处：《岩土力学》2015年S2期 　论文类型：期刊论文

【摘要】：在统计福州地区56根预应力高强混凝土(PHC)管桩单桩水平静载荷试验资料基础上,结合《建筑桩基技术规范》规范推荐的m法计算,讨论了福州地区PHC管桩的水平承载力取值问题。对不同桩型的单桩水平静载试验进行m值反算,与规范推荐的m值相比较,探讨了福州地区不同桩周土层的m值取值范围。用规范推荐的两种力学模型分别计算了某试桩的弯矩曲线,与ABAQUS有限元软件模拟得到的弯矩曲线对比,验证了规范推荐的两种模型的适用性。结果表明,本地区采用m法确定PHC管桩的单桩水平承载力是适用的;上覆填土层的物理力学性状对淤泥层中PHC管桩水平承载力影响较大,宜采取规范附录中的"桩端支撑在非岩石类土中或基岩面"的模型计算本地区PHC管桩的水平承载力。
[Abstract]:On the basis of statistics of 56 prestressed high strength concrete (PHCs) pipe pile water static load test data in Fuzhou area, combined with m method calculation recommended by Technical Code of Building pile Foundation, In this paper, the horizontal bearing capacity of PHC pipe pile in Fuzhou area is discussed. The m value of water static load test of different pile types is calculated and compared with the m value recommended by the code. In this paper, the range of m values of soil layers around different piles in Fuzhou area is discussed. The bending moment curves of a test pile are calculated by using two kinds of mechanical models recommended by the code, and compared with the bending moment curves simulated by ABAQUS finite element software. The applicability of the two models recommended by the code is verified. The results show that the m method is applicable to determine the horizontal bearing capacity of single PHC pile, and the physical and mechanical properties of overburden soil have great influence on the horizontal bearing capacity of PHC pipe pile in silt layer. The horizontal bearing capacity of PHC pipe piles in this area should be calculated by adopting the model of "pile end bracing in non-rock soil or bedrock face" in the appendix of the code.
【作者单位】：福建省建筑科学研究院;福建省绿色建筑技术重点实验室;
【分类号】：TU473.1

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