Design Parameters for Geotextile-Reinforced Unpaved Road by Applying Dimensional Analysis

IF 1.1 Q3 ENGINEERING, CIVIL
Jayalakshmi Dheiveekan, S.S. Bhosale
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Abstract

Abstract Soil swelling in road layer is the complex phenomenon. The paper aims to derive a concise expression for two challenging design parameters when the subgrade layer is expansive in geotextile-reinforced unpaved road. The design parameters considered in the present study are the mobilized bearing capacity and swelling pressure for expansive soil. Herein the dimensional analysis via Buckingham’s π method is applied to derive the design parameters by forming the dimensionless group for prototype and model system. The model testing for the swelling pressure and mobilized bearing capacity are carried out in the laboratory by using consolidometer ring and CBR set up. The test results reveal the swelling pressure of 22.03kN/m2 for the soil sample having 76% as degree of saturation. A linear relation is observed between swelling pressure and degree of saturation and becomes equal upon surcharge. The mobilized bearing capacity for the expansive soil sample is 0.47kg/cm2. The failure pattern observed during testing is general shear failure in unsoaked condition and punching soil failure in soaked condition. The paper provides geometric ratio of 1:6 for model and prototype and also suggests modification in Giroud and Han generic equation by including the developed dimensionless group.
应用尺寸分析法确定土工织物加固未铺设路面的设计参数
摘要 路面土层膨胀是一种复杂的现象。本文旨在推导出土工织物加固的未铺设路面中,当路基层为膨胀土时,两个具有挑战性的设计参数的简明表达式。本研究考虑的设计参数是膨胀土的动员承载力和膨胀压力。本文采用白金汉π法进行尺寸分析,通过对原型和模型系统进行无量纲分组,得出设计参数。利用固结环和 CBR 装置,在实验室对膨胀压力和动员承载力进行了模型试验。测试结果显示,饱和度为 76% 的土样的膨胀压力为 22.03kN/m2。膨胀压力与饱和度之间呈线性关系,并在加载时变为相等。膨胀土样的动员承载力为 0.47kg/cm2。测试过程中观察到的破坏模式是未浸水状态下的一般剪切破坏和浸水状态下的冲孔土破坏。论文将模型和原型的几何比定为 1:6,并建议通过加入开发的无量纲组来修改 Giroud 和 Han 的通用方程。
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
CiteScore
2.00
自引率
58.30%
发文量
69
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