Research of settlement calculation for vacuum preloading

SHI Jian-yong; LEI Guo-hui; AI Ying-bo; WEI Dan; SONG Xiong-wei

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Research of settlement calculation for vacuum preloading

更新时间：2026-06-25

- Research of settlement calculation for vacuum preloading
- Vol. 27, Issue 3, (2006)
- 作者机构：
  
  河海大学岩土工程研究所,南京,210098
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU443
- Online First：06 November 2013，
  
  Published：2006
- 稿件说明：
移动端阅览
SHI Jian-yong, LEI Guo-hui, AI Ying-bo, et al. Research of settlement calculation for vacuum preloading[J]. 2006, 27(3).
DOI：

SHI Jian-yong, LEI Guo-hui, AI Ying-bo, et al. Research of settlement calculation for vacuum preloading[J]. 2006, 27(3). DOI：

摘要

真空预压的沉降计算参数（压缩系数）是通过压缩试验得到的，但地基土在真空预压荷载作用下的受力状态与压缩试验中土样的受力状态是不同的，用压缩试验得到的压缩系数进行真空预压处理的沉降计算是不合理的。为了探讨这个问题，进行线弹性条件下的理论分析、模拟真空预压应力路径的全自动应力控制三轴（GDS）压缩试验、真空预压的现场监测等工作，初步讨论了弹性条件竖向荷载相同时等向与单向压缩量的比、模拟真空预压应力路径的压缩系数与单向压缩时的压缩系数的试验关系，真空预压现场监测和单向压缩量计算结果对比表明了上述分析的合理性。

Abstract

The compression coefficient in settlement calculation for vacuum preloading is based on the oedometer test

but the stress state in ground for vacuum preloading is different from oedometer test

the results of settlement calculation is unreasonable used parameter from oedometer test. The theoretic analyses in elastic condition

compression test by trixail apparatus with automatic controlled stress that can simulate the stress path in vacuum preloading

and field monitoring in project of vacuum preloading are presented. The ratio of isotropic to one dimensional consolidation in elastic condition under same load

compression coefficient from trixial test and oedometer test are discussed. Settlement results of field monitor and calculation show above consideration is reasonable.

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