Abstract

A computer based model of a novel vibro-impact ground moling system is presented as an aid to designing such systems. The equations of motion governing the system are presented and a corresponding laboratory model is described. The model includes elasto-plastic modelling of the end resistance and Coulomb terms for side resistance between the soil and the body of the moling system. Results for both penetration time histories and end resistance time histories from both the model and the rig are presented which show that the model can adequately predict the motion of the mole for design purposes.

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