Determination of elastic modulus from stress controlled cone penetration test

Abstract

Measurement of the settlement of a cone submitted to incremental loading allows the determination of a compressibility modulus correlated to those obtained using laboratory tests and moduli derived from other in situ tests. This test can be carried out with standard static penetrometer equipment. After stopping the penetration of a static penetrometer cone at a desired depth, an incremental loading test is carried out until the failure of the ground under the cone is observed. In this manner, a modulus can be obtained on the stress strain relationship. Thus the classical CPT log is enriched by moduli offering new possibilities. The development of the first prototype and its field testing, have permitted the development of the test procedure. The interpretation method, validated using laboratory and field tests and geotechnical centrifuge models can be use by practicing engineers