考虑桩身压缩的综合系数法计算超长桩基础沉降

张忠苗; 杨 淼; 房 凯

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考虑桩身压缩的综合系数法计算超长桩基础沉降

岩土工程研究 | 更新时间：2026-06-25

- 考虑桩身压缩的综合系数法计算超长桩基础沉降
- Composition coefficient method for settlement calculation of overlength pile foundation considering compressibility of pile
- 岩土力学 2012年33卷第3期
- 作者机构：
  
  浙江大学岩土工程研究所,杭州,310058
- 作者简介：
- 基金信息：
- DOI：
  中图分类号： TU473
- 网络首发：2012-03-12，
  
  纸质出版：2012
- 稿件说明：
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张忠苗, 杨淼, 房凯. 考虑桩身压缩的综合系数法计算超长桩基础沉降[J]. 岩土力学, 2012,33(3).

ZHANG Zhong-miao, YANG Miao, FANG Kai. Composition coefficient method for settlement calculation of overlength pile foundation considering compressibility of pile[J]. 2012, 33(3).
张忠苗, 杨淼, 房凯. 考虑桩身压缩的综合系数法计算超长桩基础沉降[J]. 岩土力学, 2012,33(3). DOI：

ZHANG Zhong-miao, YANG Miao, FANG Kai. Composition coefficient method for settlement calculation of overlength pile foundation considering compressibility of pile[J]. 2012, 33(3). DOI：

摘要

实测表明，超长桩基础的桩身压缩量占总沉降量很大比例，因此，等代墩基法刚性体的假定不符合实际，需要一种考虑桩身压缩量的方法来计算超长桩基础沉降。通过对现有超长桩实测数据的分析，得到了嵌岩桩桩身压缩系数拟合方程，同时得出了非嵌岩桩桩身压缩系数约为0.5；推出桩侧沉降比和桩端沉降比，并编制了Matlab计算程序。最后通过工程实例计算考虑桩身压缩的超长桩基础沉降，计算结果与实测结果相吻合。

Abstract

It’s found that the compression of pile shares a high proportion of the overall settlement in overlength pile foundation. Assuming the pile foundation as a rigid body in the equivalent pier method is not appropriate. A method considering compressibility of pile is proposed to calculate the settlement of super-long pile foundation. By analyzing the existing test data of overlength piles

a fitting equation expressed by compressibility coefficient of rock-socketed pile shaft is given; and a coefficient of 0.5 for non-rock- socketed pile is obtained. The formulas for settling ratios of pile shaft and pile tip are deduced. Meanwhile

the Matlab program is realized. At last

considering compressibility of pile

a case study is presented to calculate the settlement of overlength pile foundation; and the calculated and measured results have good agreement.

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