PHC管桩水平承载力试验研究

doi:10.16285/j.rsm.2015.S2.087

›› 2015, Vol. 36 ›› Issue (S2): 617-622.doi: 10.16285/j.rsm.2015.S2.087

PHC管桩水平承载力试验研究

施峰^{1, 2}，郝世龙^{1, 2}

1. 福建省建筑科学研究院，福建福州 350025；2. 福建省绿色建筑技术重点实验室，福建福州 350025

收稿日期:2015-04-30 出版日期:2015-08-31 发布日期:2018-06-14
作者简介:施峰，男，1964年生，硕士，总工程师，主要从事地基基础学科的研究、开发与应用方面的工作

Field test for horizontal bearing capacity of PHC pipe piles

SHI Feng^{1, 2}, HAO Shi-long^{1, 2}

1. Fujian Academy of Building Research, Fuzhou, Fujian 350025, China; 2. Key Laboratory of Fujian Green Building Technology, Fuzhou, Fujian 350025, China

Received:2015-04-30 Online:2015-08-31 Published:2018-06-14

摘要/Abstract

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。

关键词: PHC管桩, 单桩水平承载力, m法

Abstract: Based on statistics of lateral load test data of 56 prestressed high-strength concrete(PHC) pipe piles in Fuzhou area, the horizontal bearing capacity of PHC piles in Fuzhou area is studied by combining m-method recommended by China’s technical code for building pile foundation. The range of m value for different soil around piles in Fuzhou area is confirmed by comparing back analysis value based on lateral load test data of different types of piles with value recommended by the code. The applicability of two kinds of mechanical models recommended by the code are validated by comparing with the bending moment curve simulated by the ABAQUS finite element software. The results show that the m method is applicable in calculating horizontal bearing capacity of single PHC pile in Fuzhou area. Physical and mechanical properties of overlying fill soil have an evident influence on the horizontal bearing capacity of PHC piles in silt. It’s applicable to adopt the "tip of pile supported in the bedrock surface or soil" model recommended by the code’s appendix to calculate horizontal bearing capacity of PHC piles in Fuzhou area.

Key words: prestressed high-strength concrete(PHC) pipe pile, horizontal bearing capacity of single pile, m-method

中图分类号:

TU 473

施峰，郝世龙 , . PHC管桩水平承载力试验研究[J]. , 2015, 36(S2): 617-622.

SHI Feng , HAO Shi-long , . Field test for horizontal bearing capacity of PHC pipe piles[J]. , 2015, 36(S2): 617-622.

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PHC管桩水平承载力试验研究

Field test for horizontal bearing capacity of PHC pipe piles

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