Evaluating hydraulic parameters in clays based on in situ tests

IF 1.5 Q2 ENGINEERING, MULTIDISCIPLINARY

Open Engineering Pub Date : 2023-01-01 DOI:10.1515/eng-2022-0483

Mariusz Lech, Marek Bajda, Katarzyna Markowska-Lech, Simon Rabarijoely

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引用次数: 0

Abstract

Abstract The permeability of soil is an important factor controlling the flow of water through the subsoil. The article presents the results of studies of hydraulic parameters for overconsolidated clays using in situ tests. Using the excess pore pressure normalization technique, both in the case of monotonic and dilatory dissipation tests, and the time at which 50% dissipation of excess pore water pressure takes place, as well as taking into account the rigidity index of the analyzed soil, it was possible to estimate the permeability and consolidation coefficients for the analyzed clays. Based on these studies, simple relationships between the permeability coefficient and the soil behavior-type index are proposed. Proposed formulas may be applied for overconsolidated cohesive soils with soil behavior-type index values within the range of 2.05–3.30 and described in Robertson’s chart as overconsolidated silty clays, clays and heavily overconsolidated and cemented fine-grained soils. Although our proposal of determining flow parameters has been calibrated only for two analyzed cases, its utility for wider use in other overconsolidated fine-grained soils may also be taken into account.

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基于原位试验的粘土水力参数评价

摘要土壤渗透性是控制地下水渗流的重要因素。本文介绍了超固结粘土水力参数的原位试验研究结果。利用超孔隙压力归一化技术，在单调和延迟耗散试验情况下，以及超孔隙水压力耗散50%的时间，并考虑分析土的刚度指标，可以估计分析土的渗透系数和固结系数。在此基础上，提出了渗透系数与土壤行为类型指标之间的简单关系。所提出的公式适用于土壤行为型指数值在2.05 ~ 3.30范围内的超固结粘性土，在Robertson图中描述为超固结粉质粘土、粘土和重度超固结和胶结细粒土。虽然我们提出的确定流动参数的建议仅针对两个分析案例进行了校准，但它在其他超固结细粒土中的广泛应用也可以考虑在内。

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

Open Engineering ENGINEERING, MULTIDISCIPLINARY-

CiteScore

3.90

自引率

0.00%

发文量

审稿时长

30 weeks

期刊介绍： Open Engineering publishes research results of wide interest in emerging interdisciplinary and traditional engineering fields, including: electrical and computer engineering, civil and environmental engineering, mechanical and aerospace engineering, material science and engineering. The journal is designed to facilitate the exchange of innovative and interdisciplinary ideas between researchers from different countries. Open Engineering is a peer-reviewed, English language journal. Researchers from non-English speaking regions are provided with free language correction by scientists who are native speakers. Additionally, each published article is widely promoted to researchers working in the same field.