随机取向纤维对矿质土抗剪强度的影响

Q3 Earth and Planetary Sciences

Polish Journal of Soil Science Pub Date : 2019-11-21 DOI:10.17951/pjss.2019.52.2.235

T. Zydroń, A. Gruchot

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引用次数: 0

摘要

本文的目的是确定两件事:加固类型和数量对土壤抗剪强度的影响以及加固效率与土壤含水量的关系。抗剪强度测定采用直剪仪，在80x80mm方形截面的箱体内进行。法向应力范围为25 ~ 150 kPa，剪切速度为1.0 mm×min -1。试验在两种含水率下的中砂和粘性粗粉土上进行，并添加了两种增强材料——聚烯烃纤维和40x3 mm箔条。加筋量分别为土体干质量的0.5%和1.0%。试验结果表明，聚烯烃纤维分散加固砂质土，可提高砂质土的抗剪强度。而箔条对抗剪强度的影响较小。然而，在黏性土壤中使用两种类型的加固都增加了其抗剪强度，这种影响在高含水量时尤为明显。

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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Influence of randomly oriented fibres on shear strength of mineral soils

The purpose of the paper was to determine two things: the influence of type and amount of reinforcement on shear strength of soil and the relation between the efficiency of reinforcement and soil moisture content. Shear strength was determined in a direct shear apparatus in a box with a square section of 80x80 mm. The range of normal stress was from 25 to 150 kPa and the shear velocity was 1.0 mm×min -1 . The tests were carried out on medium sand and clayey coarse silt at two moisture contents and with two types of reinforcement - polyolefine fibres and 40x3 mm foil stripes. The addition of reinforcement was 0.5 and 1.0% in relation to the dry mass of soil. Test results indicated that using polyolefine fibres as dispersed reinforcement in a sandy soil increased its shear strength. Whereas the influence of using foil stripes on shear strength was little. However, using both types of reinforcement in a cohesive soil increased its shear strength and this influence was particularly clear at higher moisture content.

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来源期刊

Polish Journal of Soil Science Earth and Planetary Sciences-Earth-Surface Processes

CiteScore

1.00

自引率

0.00%

发文量

期刊介绍： The Journal focuses mainly on all issues of soil sciences, agricultural chemistry, soil technology and protection and soil environmental functions. Papers concerning various aspects of functioning of the environment (including geochemistry, geomophology, geoecology etc.) as well as new techniques of surveing, especially remote sensing, are also published.