组合桩地基土水平抗力系数的比例系数<i><>m</i>的计算方法

黄晓亮; 岳建伟; 李连东; 孙新生

组合桩地基土水平抗力系数的比例系数<>m的计算方法 English Version

1. 河南大学土木建筑学院,河南开封 475001 ； 2. 河南大学材料与结构研究所,河南开封 475001

详细信息

作者简介:
黄晓亮 (1986 – ) ,男,河南省洛阳人,硕士研究生,主要从事地基处理等岩土工程研究工作。

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

Calculation method for horizontal resistance coefficient of foundation soil with composite piles

1. School of Civil and Architectural Engineering, Henan University, Kaifeng 475001, China; 2. Research Institute of Material and Structural Engineering, Henan University, Kaifeng 475001, China

摘要

摘要: 为了提高软土的承载力,组合桩已在工程中被应用。组合桩为预制混凝土桩插入水泥搅拌桩中而形成的新桩,作为一种新型的桩,虽然在实际工程中得到应用,且试桩检测承载力高于设计值,而关于该组合桩微观受力特性的研究较少,该桩的理论还很不完善。其组合桩地基土水平抗力系数的比例系数 <> m 如何确定,规范没有相应的规定和说明。为了探讨组合桩的水平承载特性,通过对 3 根组合桩的水平承载力载荷试验研究和计算分析,探究组合桩地基土水平抗力系数的比例系数 <> m 的计算方法。试验表明应取水平承载力设计值和与之对应的变形来计算该组合桩的 <> m 值；计算时组合桩的抗弯刚度 <> EI 取芯桩和搅拌桩的代数和；组合桩的 <> m 值与《建筑桩基技术规范》中查到的对应的灌注桩的 <> m 值比较接近。
- 组合桩 /
- <> m 法 /
- 水平抗力
Abstract: In order to improve the bearing capacity of soft soil, a new-style composite pile has been used in the project. The new-style composite pile is obtained by inserting a precast concrete pile into a cement-mixing pile. As a new pile, although it is applied in practical engineering and its bearing capacity is higher than the design value, the microscopic study on stress characteristics of the pile is less, and the theory is not perfect yet. How to calculate the ratio of horizontal resistance coefficient of foundation soil with composite piles, there is no corresponding regulations and instructions in norms. To study the bearing capacity of the composite pile under lateral loading, the lateral loading tests on three composite piles are carried out. Through calc ulation and analysis it is explored how to calculate the ratio of horizontal resistance coefficient of foundation soil with composite piles. Experiments show that the design value of horizontal bearing capacity and the corresponding deformation should be used to calculate of the <>m value of the pile; Flexural rigidity of the pile <>EI can take algebraic sum of core pile and mixing pile. The <>m value of the pile is close to that of the filling pile in the Chinese Technical Code for Building Pile Foundations.
- composite pile /
- <>m method /
- horizontal resistance

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参考文献(8)

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