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- Liquan Xie
- Department of Hydraulic Engineering, College of Civil Engineering, Tongji University, Shanghai, 200092, China.
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- Xin Liang
- Department of Hydraulic Engineering, College of Civil Engineering, Tongji University, Shanghai, 200092, China.
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- Tsung-Chow Su
- Department of Ocean & Mechanical Engineering, Florida Atlantic University, 777 Glades Road, Boca Raton, FL 33431, USA.
抄録
<jats:p> The hole erosion test (HET) is commonly used to study the occurrence of internal soil erosion when water concentrated leaks occur. This erosion is known as “piping” in soil mechanics. Piping erosion is invisible and occurs randomly within the soil body. Therefore, to gain a better understanding of how piping erosion develops, it would be helpful to utilize a viewable HET design in which the dynamics of the piping hole can be observed directly. In this note, a new HET apparatus is presented that can be used to observe the development of piping erosion and to monitor the dynamic pressure condition during the hole erosion process. A preliminary model test was carried out based on the new viewable HET apparatus and “pressure heads” monitoring technique. The results successfully verified the performance of the proposed apparatus and experimental methods during the process of hole erosion, indicating that the hole shape changes during continuous erosion and is not fully symmetrical because of the initial profile of the hole. The internal hole becomes increasingly curved when subjected to continuous piping flow. Test results agree with the numerical simulation reported in 2015 by Riha and Jandora, who considered the effect of the hole entrance shape. </jats:p>
収録刊行物
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- Canadian Geotechnical Journal
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Canadian Geotechnical Journal 55 (10), 1502-1509, 2018-10
Canadian Science Publishing