Influence of suction on the parameters of the Marchetti Dilatometer Test on a compacted residual soil

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2022-09-21 DOI:10.28927/sr.2022.075921

Cândida Bernardi, O. Oliveira, M. Espíndola, R. Higashi

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引用次数: 0

Abstract

This study had the objective to evaluate the application of the Marchetti Dilatometer Test (DMT) on compacted residual soil, analyzing the influence of suction on the parameters obtained. For this, a sample of residual diabase soil was collected and compacted in the laboratory at its optimum moisture content. Granular matrix suction sensors (GMS) were installed inside the compacted sample to monitor the suction during the experiment. The GMS allowed the monitoring of suction profile variations during the drying of the specimen submitted to ambient conditions. The DMT blade was statically inserted at 6 different points of the specimen surface with measurement of parameters A and B at every 10 cm deep. It was observed that with the increase of suction, there is an increase in both: material index value (ID) and dilatometric module (ED), but a reduction in the horizontal stress index (KD) value. The increase in ED value and reduction in KD value indicates that there is an increase in deformability modulus (E) and a decrease in coefficient of at-rest earth pressure (K0). The DMT correctly detected the trend in variations in geotechnical parameters as a function of variation in soil suction profiles.

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吸力对压实残积土Marchetti膨胀计试验参数的影响

本研究旨在评价马尔凯蒂膨胀试验(Marchetti Dilatometer Test, DMT)在压实残积土上的应用，分析吸力对所得参数的影响。为此，收集了残余辉绿岩土样品，并在实验室中以最佳水分含量压实。在压实样品内部安装颗粒基质吸力传感器(GMS)，监测实验过程中的吸力。GMS允许在提交到环境条件下的试样干燥过程中监测吸力剖面的变化。将DMT刀片静态插入试件表面的6个不同点，每10 cm深度测量参数A和B。结果表明，随着吸力的增加，材料指数值(ID)和膨胀模量(ED)均有所增加，但水平应力指数值(KD)有所降低。ED值增大，KD值减小，表明变形模量(E)增大，静土压力系数(K0)减小。DMT正确地检测了土工参数随土壤吸力曲线变化的趋势。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.