土工基础

土工基础 ›› 2024, Vol. 38 ›› Issue (5): 859-864.

• 测试技术 • 上一篇    下一篇

动荷载作用下结构性软黏土震陷特性研究

朱 燚1，尚英杰2，杨爱武1   

  1. （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）
  • 收稿日期:2022-12-11 修回日期:2022-12-16 出版日期:2024-10-31 发布日期:2024-10-23
  • 作者简介:朱燚（1998-），男，硕士研究生，研究方向为软土的力学特性。

Study on the Seismic Trap Characteristics of Structural Soft Clay Soils Under Dynamic Loading

ZHU Yi1, SHANG Yingjie2, YANG Aiwu1   

  1. (1.College of Environmental Science and Engineering, Donghua University, Shanghai 201620;
    2.Tianjin Key Laboratory of Soft Soil Characteristics and Engineering Environment, Tianjin Chengjian University, Tianjin 300384)
  • Received:2022-12-11 Revised:2022-12-16 Online:2024-10-31 Published:2024-10-23

摘要： 动荷载作用下的软黏土震陷特性与其结构性密切相关，研究结构性软黏土的震陷特性对于预防软土地区震陷灾害具有重要意义。通过配比试验，配制了四种含水率相同、物质成分相近而结构强度不同的人工结构性软黏土，对其进行动三轴试验，研究在循环动荷载作用下结构性软黏土的震陷特性。结果表明：对于同一种结构强度的软黏土，循环动荷载幅值越大、围压越小，其震陷量越大；结构性软黏土对循环动荷载的抵抗能力与土体结构强度呈现非线性关系。研究成果可为相关工程建设提供参考。


关键词: 结构性软黏土, 结构强度, 震陷量, 震陷特性

Abstract: The seismic properties of the soft clay under the dynamic loading are closely related to its structural properties, and the study of the seismic properties of the structural soft clay is of great significance for the prevention of seismic hazards in soft soil areas. Since it is difficult to obtain the soft clay with the same material composition but different structural properties in nature, four artificial structural soft clay samples with the same moisture content and similar material composition but different structural strength are prepared in this paper through comparison tests. The results show that for soft clay soils of the same structural strength, the larger the amplitude of the cyclic dynamic load and the smaller the enclosing pressure, the larger the seismic subsidence; the resistance of structural soft clay soils to cyclic dynamic loads shows a non-linear relationship with the structural strength of the soil. In addition, an analytical model is constructed to estimate the seismic subsidence of soft clay soils considering the influence of the structural strength. The results can provide scientific basis for the relevant engineering projects.

Key words: Structural Soft Clay, Structural Strength, Seismic Subsidence, Seismic Subsidence Characteristic

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