室内粉质黏土结构性的人工制备及其实验研究  

Artificial preparation and experimental study of indoor silty clay structure

作　　者：朱建明[1] 刘麟 任瑞乐 王柳茜 邵坤 Zhu Jianming;Liu Lin;Ren Ruile;Wang Liuqian;Shao Kun(School of Safety Engineering,North China Institute of Science and Technology,Beijing 101601,China)

机构地区：[1]华北科技学院安全工程学院,北京101601

出　　处：《山西建筑》2023年第24期6-9,共4页Shanxi Architecture

基　　金：河北省自然科学基金(编号:E2017508085)。

摘　　要：针对苏州S1轨道交通线在下穿阳澄湖底部所遇到的粉质黏土的结构性开展室内人工制备结构性土的研究,采用加入少量水泥和食盐构造多组结构性强弱不同的方法来模拟制备人工结构性土,采用已获得的专利“干粉制样法”进行制样,克服了传统湿式制备方法制备土样不稳定和不完整的缺点,通过与原状土实验对比,得出了苏州地区粉质黏土室内结构性土的最佳水泥配比,并对室内制备的人工结构性土开展了三轴固结不排水实验,针对其主应力差和应变的关系、有效主应力比和轴向应变的关系进行了研究,其结果对该地区盾构施工参数的确定具有参考意义。Based on the structure of silty clay encountered by Suzhou S1 rail transit line at the bottom of Yangcheng Lake,this paper carried out indoor artificial structural soil preparation research.The method employed involves adding small amounts of cement and salt to create multiple sets of artificial structural soils with varying strengths and weaknesses,and the“dry powder sample preparation method”was used for the first time to prepare artificial structural soil.In order to overcome the shortcomings of unstable and incomplete soil samples prepared by the traditional wet preparation method,the optimal cement ratio of indoor structural soil of silty clay in Suzhou area was obtained by comparing with the experiment of undisturbed soil.Triaxial consolidation undrained experiment was carried out on the artificial structure prepared in the laboratory.The relationship between principal stress difference and strain,between effective principal stress ratio and axial strain are studied.The results are of guiding significance to the determination of construction parameters of shield tunneling in this area.

关 键 词：粉质黏土 土的结构性 人工制备 干粉制样法 最佳配比 

分 类 号：TU442[建筑科学—岩土工程]