DETERMINATION OF THE HYDRAULIC CHARACTERISTICS OF SOILS FROM PIEZOMETRIC VARIATIONS

DETERMINATION DES CHARACTERISTIQUES HYDRAULIQUES DES SOLS A PARTIR DES VARIATIONS PIEZOMETRIQUES

The piezometric level of an alluvial water table, which is connected with a river, is a direct function of the level of the latter and any variation in the level of the river is reflected in the level of the alluvial water table. The study of the variations should facilitate the determination of the hydraulic properties of the water table. The first part of the article analyzes various cases: horizontal propagation in a free or captive water table, vertical propagation in compressible or non-compressible silt overlaying gravel. In each case formulae are derived for a homogeneous medium, which can be applied to the damping and dephasing of the water movement. It is shown that it is impossible to obtain the permeability coefficient value, for which it is necessary to measure the flow and coefficient of consolidation of compressible soil, because damping is too rapid. The second part of the article deals with the application of the above theories to the study of the properties of the subgrade of three embankments in the seine valley, the seine being subjected to marling and seasonal floods. The main conclusion is that, if it is not possible to obtain the value of the soil hydraulic parameters. The observation of the fluctuation in pressure in compressible media shows that the terrain is satisfactorily drained and that consolidation will be rapid. /TRRL/

• Corporate Authors:

  Laboratoire Central des Ponts et Chausees (LCPC)

  Boulevard Lefebvre 58
  Paris Cedex 15,   France  F-75732
• Authors:
  • Rat, M
  • Vautran, J
• Publication Date: 1973-3-4

Language

• French

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 103-119
• Serial:
  • Bulletin de Liaison des Lab des Ponts et Chaussees
  • Issue Number: 64
  • Publisher: Laboratoire Central des Ponts et Chausees (LCPC)

Subject/Index Terms

• TRT Terms: Alluvium; Analysis; Compressibility; Consolidations; Damping (Physics); Drainage; Embankments; Gravel; Height; Hydraulics; Hydrology; Motion; Permeability; Piezometers; Pore water pressures; Rivers; Silts; Soil mechanics; Subgrade (Pavements); Subsoil; Surveys; Water table
• Old TRIS Terms: Discharge; Subsoil analysis
• ITRD Terms: 4030: Alluvium; 5905: Compressibility; 5791: Consolidation (soil); 4323: Discharge (flow); 2937: Drainage; 2801: Embankment; 4575: Gravel; 6489: Height; 4332: Hydrology; 1088: Inland waterway; 9048: Modification; 5483: Movement; 5921: Permeability; 6107: Piezometer; 5762: Pore water pressure; 5412: Pressure; 5925: Properties; 4149: Silt; 4156: Soil; 5408: Speed; 2950: Subgrade; 4355: Water; 4394: Water table
• Subject Areas: Geotechnology; Highways; Hydraulics and Hydrology; I41: General Soil Surveys;

Filing Info

• Accession Number: 00125299
• Record Type: Publication
• Source Agency: Laboratoire Central des Ponts et Chausees (LCPC)
• Files: ITRD, TRIS
• Created Date: Dec 3 1975 12:00AM