Buckling analysis of cast-in-situ rock-socketed piles with highrise pile cap under complicated subgrade reaction modulus

ZOU Xin-jun; ZHAO Ming-hua; LIU Guang-dong

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Buckling analysis of cast-in-situ rock-socketed piles with highrise pile cap under complicated subgrade reaction modulus

更新时间：2026-06-25

- Buckling analysis of cast-in-situ rock-socketed piles with highrise pile cap under complicated subgrade reaction modulus
- Vol. 29, Issue 4, (2008)
- 作者机构：
  
  湖南大学土木工程学院,长沙,410082
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU473.1
- Online First：10 July 2013，
  
  Published：2008
- 稿件说明：
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ZOU Xin-jun, ZHAO Ming-hua, LIU Guang-dong. Buckling analysis of cast-in-situ rock-socketed piles with highrise pile cap under complicated subgrade reaction modulus[J]. 2008, 29(4).
DOI：

ZOU Xin-jun, ZHAO Ming-hua, LIU Guang-dong. Buckling analysis of cast-in-situ rock-socketed piles with highrise pile cap under complicated subgrade reaction modulus[J]. 2008, 29(4). DOI：

摘要

为探讨桩侧地基土反力对高承台嵌岩灌注桩桩身屈曲稳定的影响，假定地基反力系数呈更为复杂的幂分布，基于弹性地基梁理论建立桩土体系总势能方程，采用最小势能原理，导出了桩身屈曲临界荷载与稳定计算长度的解析解，并据此获得了地基反力系数分布模式、桩身自重及桩侧摩阻力等对桩身屈曲稳定的影响规律。工程应用分析结果表明，考虑地基反力系数为一般幂分布时，桩身屈曲分析结果更趋合理。

Abstract

To discuss the influence by the constraint of surrounding soil on the buckling stability of cast-in-situ rock-socketed piles with highrise pile cap

the most general exponential distribution of subgrade reaction modulus was assumed and the total potential energy equation of the pile-soil system was set up based on the simplified elastic beam model. Then

analytical solutions for the buckling length and buckling load of the pile shaft were deduced by applying the principle of minimum potential energy. And based on the obtained solutions

influencing rules by the distribution mode of subgrade reaction modulus

deadweight and side resistance along the pile shaft on the buckling behavior of cast-in-situ rock-socketed piles with highrise pile cap were discussed and obtained respectively in detail. Application of the present method to an engineering example shows that

more reasonable buckling analysis results of the pile shaft may be obtained when the distribution of subgrade reaction modulus is characterized by an exponential function.

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