FLOW-PUMP TECHNIQUE AS A CONSTANT VELOCITY METHOD OF FLOW MEASURMENT IN SOFT ORGANIC SOILS
Journal Title: ELECTRONIC JOURNAL OF POLISH AGRICULTURAL UNIVERSITIES - Year 2011, Vol 14, Issue 4
Abstract
In this paper the results of the relationship between pore pressure differences and time obtained in laboratory flow-pump technique tests in soft organic soils are presented. The Soil-Water Characterist ic is necessary to predict and ca lculate the real amount of vertical and horizontal deformations which depend on consolidation process and are relati vely large in soft organic soils. The consolidation curve is changeable with the different values of load. In the deformation process of soil skeleton, under loading, the porosity decreases and causes the changes of permeability characteristics. Considerable differences in flow parameters between soft, cohesive and uncohesive soils demand to use various methods of water flow measurement in the subsoil under the engineering constructions. The laboratory methods for permeability measurement should model the main course of in-situ flow for fully saturated soils. Because of very week organic soils structure and specific properties, such as, high porosity, low shear strength and high initial permeability which decrease during consolidation, the method of flow measurement should be suitable. The results obtained in flow-pump laboratory tests indicated that the constant velocity method is very optimized and proper to measure the flow parameters in soft peats.
Authors and Affiliations
Edyta Malinowska
Keywords
Related Articles
- EP ID EP114762
- DOI -
- Views 114
- Downloads 0
MORPHOMETRIC ANALYSIS OF EARLY MEDIEVAL DOG SKULLS FROM POMERANIA ALLOWING FOR FOREHEAD POSITION INDEX AND DORSAL NOTCH OF THE FORAMEN MAGNUM
The study aimed at analysis of the metric traits of historic dog skulls allowing for the value of forehead position index as well as the presence or the lack of dorsal notch in the foramen magnum. Examinations included 2...
THE EFFECT OF VARIABLE ENVIRONMENTAL CONDITIONS ON DIMENSIONAL CHANGES IN THIN WOOD-BASED MATERIALS PART II. DESORPTION CHANGES
The study comprised an analysis of dimensional changes in thin wood-based boards caused by cyclical changes in relativehumidity at constant ambient temperature. Analyses were conducted on MDF, HDF, PB and OSB. As a resul...
EFFECT OF MANNANOLIGOSACCHARIDES, INULIN AND YEAST NUCLEOTIDES ADDED TO CALF MILKREPLACERS ON RUMEN MICROFLORA, LEVEL OF SERUM IMMUNOGLOBULIN AND HEALTH CONDITION OF CALVES
The aim of study was to determine effect of applied in calf milk replacer feed additiv mannanooligosaccharides, inulin and yeast nucleotides on rumen microflora, level of serum immunoglobulin and calf health condition. T...
OPERATION TIME CONSUMPTION OF HIGH-POWERED HARVESTER IN SALVAGE FELLING
In the Czech Republic, harvester technologies represent the second most-frequently used technology. Demand for high efficiency in this type of technology is conditioned by the need to cover acquisition and operation cost...
OPTIMISATION OF A SOFA FRAME IN THE INTEGRATED CAD-CAE ENVIRONMENT
Majority of manufacturers of upholstered furniture design construction frames on the basis of craftsman’s intuition and imitation rather than on the basis of engineer practice. The objective of this study was to present...