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Title: Soil pressure cell investigation : interim report
Authors: U.S. Army Engineer Waterways Experiment Station.
Keywords: Pressure gages
Soil mechanics
Strains and stresses
Soil mechanics
Soil pressure cell
Publisher: U.S. Army Engineer Waterways Experiment Station.
Engineer Research and Development Center (U.S.)
Description: Technical Memorandum
Purpose: Pressure cells provide a means for the direct determination of stress distribution within earth structures and foundations. This function is particularly important as a check on and aid to the theory of design of such structures. The theories of stress distribution which are employed in the design of earth structures and foundations require certain generalizing assumptions which simplify the conditions of application of the elastic properties of soil. The assumed conditions are, in general, not fulfilled in nature, the degree of discrepancy varying locally and usually to an unknown extent. Consequently. the extent to which this disagreement will affect the validity of the theoretical design is indefinite. The determination of actual stress distributions in prototype or model structures would obviously furnish both a positive cheek on the validity of the assumptions made in the design procedure and a source of empirical information for use in further development of the design theory. The stresses to be measured would be both the solid phase and the liquid phase stresses in tho soil mass and against rigid walls, footings and tunnels, and would be essentially static, since any changes, except perhaps those which might occur during or just preceding a failure would take place over long periods of time. The investigation of pressure cells as sources of information on stresses in earth masses had as its objectives: (A.) The determination of the limiting values of various dimensions and physical properties within which the characteristics of a satisfactory pressure cell must be maintained so that it will measure reliably the true soil pressure. (B.) The determination, through performance tests, of the limitations of various existing pressure cells with regard to service life, reliability, installation and operation procedure and the degree of fulfillment of the requirements established by the first objective. (C.) The rational design of a pressure cell which will best satisfy the conditions of the first objective and incorporate the pertinent factors of the second. NOTE: This file is large. Allow your browsers several minutes to download the file.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Technical Memorandum

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