Dynamic cone penetration device
First Claim
1. In a method of measuring soil denseness wherein a penetrating cone at one end of a cone rod is driven a predetermined distance into the soil by counting the number of strikes of a predetermined force on a striking surface of the cone rod, of a predetermined force, the improvement of reducing soil friction between the cone rod and the soil, comprising the steps of rotating the cone rod at a sufficient speed to reduce friction between the cone rod and the soil while the cone is driven the predetermined distance into the soil.
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Abstract
A dynamic cone penetration device for determining denseness of soil has reduced friction to provide more accurate testing. The device comprises a cone rod having a soil penetrating cone at one end and an anvil at the other end. The cone has a larger diameter than the cone rod, and the anvil has a striking surface for striking with a predetermined force. A rotation system containing a motor rotates the cone rod at a sufficient speed to reduce friction between the cone rod and the soil as the striking surface is struck.
16 Citations
8 Claims
- 1. In a method of measuring soil denseness wherein a penetrating cone at one end of a cone rod is driven a predetermined distance into the soil by counting the number of strikes of a predetermined force on a striking surface of the cone rod, of a predetermined force, the improvement of reducing soil friction between the cone rod and the soil, comprising the steps of rotating the cone rod at a sufficient speed to reduce friction between the cone rod and the soil while the cone is driven the predetermined distance into the soil.
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4. A method of measuring soil denseness comprising the steps of:
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positioning a penetrating cone, located at one end of a cone rod, on soil surface;
striking a striking surface on the other end of the cone rod with a predetermined force to penetrate the soil surface;rotating the cone rod at a sufficient speed to reduce friction between the cone rod and the soil as the penetrating cone penetrates the soil surface; and counting the number of strikes of predetermined force on the striking surface of the cone rod until the penetrating cone has penetrated the soil for a predetermined distance, the number of strikes representing a measurement of soil denseness. - View Dependent Claims (5, 6, 7, 8)
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Specification