| Abstract: | Conclusions
| 1. |
For the example of sinusoidal pulses applied to the end of a pipe, we have shown that a pulse with the greatest amplitude
at fixed shock energy will drive the pipe furthest into the ground.
|
| 2. |
Other conditions being equal, the greatest distance to which the pipe is driven in the ground is directly proportional to
the amplitude of the initial pulse applied to the end of the pipe.
|
| 3. |
The residual strain (stress) in the pipe due to the presence of external friction increases with the length of the shock pulse.
|
| 4. |
The damping of the shock-pulse amplitude is linear, regardless of the elastic properties of the ground, as long as individual
sections of the pipe slip relative to the ground. The damping coefficient is directly proportional to the frictional coefficient
of the pipe in the ground and does not depend on the shock-pulse configuration.
|
| 5. |
Analysis shows that the distance to which the pipe is driven in the ground may be increased by a factor of more than 1.5,
at constant shock energy, by eliminating the intermediate mass from the model of the shock-pulse generator; in practice, the
intermediate mass corresponds to the housing of the shock machine rigidly connected to the anvil.
|
Institute of Mining, Siberian Branch, Russian Academy of Sciences, Novosibirsk. Translated from Fiziko-Tekhnicheskie Problemy
Razrabotki Poleznykh Iskopaemykh, No. 2, pp. 48–58, March–April, 1998. |
