نتایج جستجو برای: SWCC

تعداد نتایج: 108  

2014
S. J. Matlan M. Mukhlisin M. R. Taha

Characterization of the engineering behavior of unsaturated soil is dependent on the soil-water characteristic curve (SWCC), a graphical representation of the relationship between water content or degree of saturation and soil suction. A reasonable description of the SWCC is thus important for the accurate prediction of unsaturated soil parameters. The measurement procedures for determining the...

2017
Weiping Liu Xiaoyan Luo Faming Huang Mingfu Fu

It is important to determine the soil–water characteristic curve (SWCC) for analyzing slope seepage and stability under the conditions of rainfall. However, SWCCs exhibit high uncertainty because of complex influencing factors, which has not been previously considered in slope seepage and stability analysis under conditions of rainfall. This study aimed to evaluate the uncertainty of the SWCC a...

2016
Won-Taek Hong Young-Seok Jung Seonghun Kang Jong-Sub Lee

The objective of this study is to estimate multiple-cycles of the soil-water characteristic curve (SWCC) using an innovative volumetric pressure plate extractor (VPPE), which is incorporated with a membrane and time domain reflectometry (TDR). The pressure cell includes the membrane to reduce the experimental time and the TDR probe to automatically estimate the volumetric water content. For the...

2013
Christopher A. Bareither Craig H. Benson

The Bouwer-Rice correction method to account for large particles excluded during laboratory testing to measure the soil water characteristic curve (SWCC) was evaluated on samples of well-graded alluvium. A large-scale hanging column apparatus was used so that tests could be conducted on specimens containing all particle sizes. The analyses show that SWCCs measured on the fraction of alluvium fi...

2008
S. Sreedeep D. N. Singh

Several methodologies have been developed and used by researchers for measuring either total suction ψ (sum of matric suction ψm and osmotic suction ψo), or only ψm. While employing different methodologies for establishing the soil-water characteristic curve, SWCC, there is a possibility that the factors such as the type of the soil suction measured, measurement range, equilibration time, prese...

بررسی ویژگی‌های هیدرولیکی خاک همچون نقطه پژمردگی و ظرفیت زراعی برای مطالعه و مدل‌سازی حرکت آب و املاح در خاک لازم است. به دلیل تغییرات زمانی و مکانی این ویژگی‌ها، روش‌های غیرمستقیم در تخمین آن‌ها توسعه داده‌شده است. در این پژوهش از 10 مدل مختلف به‌منظور انتخاب بهترین مدل برای تخمین منحنی مشخصه رطوبتی (SWCC) در خاک‌های رسی، لوم رسی و لوم شنی استفاده شد. بدین منظور ابتدا SWCC خاک‌های موردمطالعه ب...

2009
Yvonne Lins Tom Schanz Delwyn G. Fredlund

The determination of soil-water characteristic curve (SWCC) is of major concern in unsaturated soil mechanics. For decades experimental and theoretical studies are performed to investigate the constitutive relationship between soil suction and volumetric water content. The major objective of our study is to generate an extensive experimental database for sand with a relevant suction range of ju...

1999
Ronny Krashinsky

Split-C is a single program, multiple data (SPMD) programming language. Split-C provides the ability to use a shared address space abstraction on a distributed shared memory (DSM) system, such as a network of workstations (NOW). The existing Split-C compiler translates all references to shared variables owned by another processor into network transactions. We implement SWCC-Split-C, a modified ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه بوعلی سینا - دانشکده علوم کشاورزی 1388

چکیده ویژگی های هیدرولیکی خاک (منحنی مشخصه رطوبتی، swcc و هدایت هیدرولیکی، hc) اهمیت کلیدی در فیزیک خاک دارند. این ویژگیها با روشهای مستقیم و غیرمستقیم قابل اندازه گیری اند که هر کدام از این روشها مزایا و معایب خاص خود را دارند. با وجود پیشرفتهای زیادی که در مورد روش های اندازه گیری آنها انجام گرفته است، هر دو گروه روشها وقتگیر، هزینه بر و خسته کننده اند. از این رو استفاده از روشهای غیرمستقیم...

2010
Charbel Khoury

Unsaturated soils are commonly widespread around the world, especially at shallow depths from the surface. The mechanical behavior of this near surface soil is influenced by the seasonal variations such as rainfall or drought, which in turn may have a detrimental effect on many structures (e.g. retaining walls, shallow foundations, mechanically stabilized earth walls, soil slopes, and pavements...

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