大直径扩底桩水平承载性能影响因素分析

任连伟; 王俊林

大直径扩底桩水平承载性能影响因素分析 English Version

任连伟¹,
王俊林²

1.河南理工大学土木工程学院,河南焦作 454000 ； 2. 郑州大学水利与环境学院,河南郑州 450002

详细信息

作者简介:
任连伟 (1980 – ) ,男,河南周口人,博士,讲师,从事基础工程相关的科研与教学。

中图分类号: TU473.1
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出版历程
- 收稿日期: 2011-08-01
- 发布日期: 2011-12-06

Factors for horizontal bearing capacity of large-diameter belled piles

REN Lian-wei¹,
WANG Jun-lin²

1. School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454000, China; 2. School of Water Conservancy and Environment, Zhengzhou University, Zhengzhou 450002, China

摘要

摘要: 为掌握大直径扩底桩的水平承载性能,运用 FLAC^3D 对人工挖孔大直径灌注扩底桩水平承载性能的影响因素进行了数值模拟分析。首先,模拟结果与现场水平载荷试验结果进行了对比,验证了模型的可靠性,然后分析了土层厚度、土层弹性模量、扩大头尺寸对大直径扩底桩水平载荷性状的影响。模拟结果表明,上部土层的弹性模量对桩身水平位移的影响比较显著,表土层弹性模量宜在 10 MPa 以上；为充分发挥大直径扩底桩的水平承载性能,桩长宜为 7 倍桩径左右,不宜大于 10 倍桩径；从水平承载性能、经济和施工技术综合考虑,扩大头高度与扩大头直径比值宜在 0.5 ～ 0.7 之间。研究结论对指导工程实践有一定的意义。
- 大直径扩底桩 /
- 水平承载力 /
- 数值模拟 /
- 影响因素
Abstract: In order to obtain the behaviors of horizontal bearing capacity of large-diameter belled concrete piles, numerical simulation using FLAC^3D software is carried out for analyzing the factors affecting the bearing capacity. First, the simulated results and field test results are compared to verify the reliability of the simulation model, and then the soil depth, soil elastic modulus, belled head size and main factors affecting the horizontal bearing capacity are simulated and analyzed. The results show that the elastic modulus of the upper layer soil is significant to affect the horizontal displacement of large-diameter belled piles and should be above 10 MPa. In order to give their full play of horizontal bearing capacity, the pile length should be around 7 times the diameter and not be greater than 10 times the diameter. The horizontal bearing capacity, economy and construction techniques are taken into account, and the ratio of the belled head height to the diameter should be between 0.5-0.7. The results have some practical significance for guiding engineering practice.
- large-diameter belled pile /
- horizontal bearing capacity /
- numerical simulation /
- factor

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参考文献(10)

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