Research on Creep Characteristics of Blow⁃filled Cured Lightweight Soils under the Action of Wet⁃dry Cycles

YANG Shaopeng; YANG Aiwu; LANG Ruiqing

doi:10.13409/j.cnki.jdpme.20221124002

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Research on Creep Characteristics of Blow⁃filled Cured Lightweight Soils under the Action of Wet⁃dry Cycles

更新时间：2025-09-25

- Research on Creep Characteristics of Blow⁃filled Cured Lightweight Soils under the Action of Wet⁃dry Cycles
- Journal of Disaster Prevention and Mitigation Engineering Vol. 44, Issue 2, Pages: 478-487(2024)
- 作者机构：
  
  1.东华大学环境科学与工程学院,上海 201620
  2.天津城建大学天津市软土特性与工程环境重点实验室,天津 300384
- 作者简介：
- 基金信息：
- DOI：10.13409/j.cnki.jdpme.20221124002
  CLC： TU447
- Received：24 November 2022，
  
  Revised：2023-01-31，
  
  Published：25 April 2024
- 稿件说明：
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杨少朋,杨爱武,郎瑞卿.干湿循环作用下吹填固化轻质土蠕变特性研究[J].防灾减灾工程学报,2024,44(02):478-487.

YANG Shaopeng,YANG Aiwu,LANG Ruiqing.Research on Creep Characteristics of Blow⁃filled Cured Lightweight Soils under the Action of Wet⁃dry Cycles[J].Journal of Disaster Prevention and Mitigation Engineering,2024,44(02):478-487.
杨少朋,杨爱武,郎瑞卿.干湿循环作用下吹填固化轻质土蠕变特性研究[J].防灾减灾工程学报,2024,44(02):478-487. DOI： 10.13409/j.cnki.jdpme.20221124002.

YANG Shaopeng,YANG Aiwu,LANG Ruiqing.Research on Creep Characteristics of Blow⁃filled Cured Lightweight Soils under the Action of Wet⁃dry Cycles[J].Journal of Disaster Prevention and Mitigation Engineering,2024,44(02):478-487. DOI： 10.13409/j.cnki.jdpme.20221124002.

摘要

采用新型固化技术对高含水率吹填土进行固化处理，通过三轴流变仪，考虑干湿循环次数、围压和初始静偏应力等因素研究其对吹填固化轻质土蠕变变形和抗剪强度指标的影响规律。试验结果表明：吹填固化轻质土具有密度小、质量轻及强度高等优点。在一定程度上，增大围压可有效缓解吹填固化轻质土的蠕变变形，而初始静偏应力对其影响较小，前7次干湿循环对土体破坏应力的影响最大，而后基本保持不变。抗剪强度指标

、

值均随初始静偏应力的增加而逐渐降低，随干湿循环次数的增加呈现出先减小而后逐渐稳定的趋势，且前7次干湿循环，二者均呈指数函数降低；7次以后，变化均较小并逐渐稳定。基于

、

值与时间关系曲线，分别构建了不同偏应力作用下吹填固化轻质土

、

值的预测公式。根据蠕变曲线发展态势，通过回归分析，引入围压、初始静偏应力和干湿循环次数等因素，建立了吹填固化轻质土蠕变变形预测模型，并验证了其可行性。研究结果可为实际工程场地提供理论依据。

Abstract

A new curing technique was used to treat blow-filled soils with high moisture content. The influence of this technique on creep deformation and shear strength indices of cured lightweight blow-filled soils was studied using triaxial rheometer

considering the number of wet-dry cycles

confining pressure

and initial static deflection stress. The test results showed that the blow-filled cured lightweight soils featured the advantages of low density

light mass

and high strength. Increasing the confining pressure

to some extent

could effectively alleviate the creep deformation of the soil

whereas the initial static deflection stress had less effect on it. The first seven wet-dry cycles had the greatest effect on the soil's damage stress

after which it remained basically stable. The shear strength indices

c and φ

decreased gradually with the increase in initial static deflection stress

and showed a pattern of initial decrease followed by a gradual stabilization with the increase of wet-dry cycle numbers. Both indices decreased exponentially over the first seven wet-dry cycles

and after that

the changes were smaller and gradually formed stability. Based on the relationship curves between c

φ values

and time

predictive equations for c and φ values of blow-filled cured lightweight soils under different deflection stresses were constructed

respectively. By examining the development of creep curves and using regression analysis with confining pressure

initial static deflection stress

and wet-dry cycle numbers as variables

a predictive model for the creep deformation of blow-filled cured lightweight soils was established

and its feasibility was verified. The results can provide a theoretical basis for practical engineering applications.

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references

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