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ASTM D4719

Historical Version s - view previous versions of standard. More D A pressuremeter modulus and a limit pressure are obtained for use in geotechnical analysis and foundation design. Correlations of the test results to soil strength and stiffness and to engineering design applications are generally empirical, and deviation from the methodology described in this test method may have undesirable effects. Considerations may include whether the test directly measures strength or stiffness, the orientation of loading, the level of induced strain, insertion or borehole disturbance effects, soil sensitivity, soil saturation, drainage effects, and the robustness of the test equipment, etc. This disturbance is particularly significant in very soft clays and very loose sands.


Standard Test Method for Prebored Pressuremeter Testing in Soils

The pressuremeter test is an in situ, stress-strain test performed on the wall of a test cavity using a circular cylindrical probe that is expanded radially. To obtain viable test results, disturbance of the test cavity must be minimized with minimal clearance between the diameter of the probe and the test cavity. Alternatively, when preboring does not provide an acceptable test cavity, the probe may be directly inserted into the ground to form the test cavity. Knowledge of the type of soil to be tested is necessary for assessment of 1 the method of preparing the test cavity, 2 the interpretation of the test data, and 3 the acceptability of the test results. This test method is limited to the type of pressuremeter that is inserted into predrilled boreholes or, under certain circumstances, is inserted by driving or pushing. Strain-controlled tests may yield different results than the procedures described in this test method.

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