动荷载作用下结构性软黏土震陷特性研究  

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

作　　者：朱燚 尚英杰[2] 杨爱武 ZHU Yi;SHANG Yingjie;YANG Aiwu(College of Environmental Science and Engineering,Donghua University,Shanghai 201620;Tianjin Key Laboratory of Soft Soil Characteristics and Engineering Environment,Tianjin Chengjian University,Tianjin 300384)

机构地区：[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

出　　处：《土工基础》2024年第5期859-864,共6页Soil Engineering and Foundation

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。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.

关 键 词：结构性软黏土 结构强度 震陷量 震陷特性 

分 类 号：TU435[建筑科学—岩土工程]