Therefore, for the specified case (pile piles), the assumption made is justified by observations in the field.
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Whether the formation of cracks is allowed, or rather their system, with vibro immersion of piles, cannot be said confidently due to the lack of experimental data. At the same time, in our opinion, in tight plastic, semi -hard and solid soils, this is quite possible and even at the first moment necessarily. In softly plastic soils and soils close to fluid, cracks may form, but due to changes in viscosity, they quickly disappear, filling in the squeezed soil. It is also important that as a result of the transition of the soil around the pile into a viscous-tneum, or even a diluted state, not water (pore solution) is squeezed out, but a suspension, sometimes very concentrated. If this is the case, then the additional volume of voids in the array near the immersed pile arises, which facilitates its immersion. Finally, it should also be taken into account that with a vibration load of piles, in contrast to their clogging, apparently, in a more significant volume of the soil, the transformation of physically connected water into free. This means that in the case under consideration, especially if cracks are formed, more favorable conditions are created for immersing a larger number of piles in the same soil volume. In other words, with a vibration pile of piles, compared to their clogging! Under the same conditions, the bulging of the soil should occur after immersion of a larger number of piles.
As can be seen from all of the above, to identify the true picture during the vibration of the piles, it is necessary to set laboratory and field research, the priority program of which, but in our opinion, should include the following questions:
1. Whether cracks (or cracks system) are observed with vibration piles of piles. What are their sizes, direction and depth of distribution, what soil they are filled.
2. What is the physical zone of the vibration of soils around the immersed piles depending on the type of vibro loader, its power, operating mode, piles, their shape, material, etc. D.
3. How the physico-mechanical properties of soils around the clogged piles change at a different distance from the last.