A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Diagnosis of mineral clogging hazards in subsurface drainage systems
Abstract The paper presents a global review of drain clogging hazard criteria. Some of them are simple granulometric formulae, some include an evaluation of soil structural stability, and some others are based on laboratory tests which reproduce water-flow through a soil core. A recent development is then described. Terzaghi's theory of critical hydraulic gradient explains structural break-up of soil samples by water-flow towards drain pipes. Based on this theoretical approach, a laboratory test has been designed to determine experimental values of the hydraulic gradient causing soil breaking. This test is used to compare the stability of different soil materials and to diagnose mineral clogging hazards. Due to the existence of numerous granulometric criteria there is evidence that no global criterion can be found. If a proper granulometric criterion is suited to a given climatological and pedological context, the hydraulic laboratory test is probably the most cost-effective method to diagnose mineral clogging hazard, especially when no field references are available.
Diagnosis of mineral clogging hazards in subsurface drainage systems
Abstract The paper presents a global review of drain clogging hazard criteria. Some of them are simple granulometric formulae, some include an evaluation of soil structural stability, and some others are based on laboratory tests which reproduce water-flow through a soil core. A recent development is then described. Terzaghi's theory of critical hydraulic gradient explains structural break-up of soil samples by water-flow towards drain pipes. Based on this theoretical approach, a laboratory test has been designed to determine experimental values of the hydraulic gradient causing soil breaking. This test is used to compare the stability of different soil materials and to diagnose mineral clogging hazards. Due to the existence of numerous granulometric criteria there is evidence that no global criterion can be found. If a proper granulometric criterion is suited to a given climatological and pedological context, the hydraulic laboratory test is probably the most cost-effective method to diagnose mineral clogging hazard, especially when no field references are available.
Diagnosis of mineral clogging hazards in subsurface drainage systems
Lennoz-Gratin, Christiane (author) / Lesaffre, Benoît (author) / Penel, Michel (author)
1993
Article (Journal)
English
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