Method for pile-driving

Abstract

A method for optimizing the driving of a pile into the ground by a pile-driving machine using a hammer ram; moving a block for driving the pile towards the end of the pile with an impact energy (Wkin); determining a kinetic variable (Q1) of the impact, proportional to the kinetic energy of the block, when the block is moving towards the pile in the pile driving direction; determining the value of a kinetic variable (Q3) of the return motion, proportional to the kinetic energy of the block, when returning, after an impact on the pile, in a direction opposite to the pile driving direction; calculating a kinetic variable ratio (Q1 / Q3); comparing (Q1 / Q3) with a predetermined target value (Q1 / Q3tav) for (Q1 / Q3), producing the shortest possible total pile driving time (ttot); adjusting the impact energy (Wkin) of the next impact so (Q1 / Q3) of the next impact is changed towards (Q1 / Q3tav).

Description

FIELD[0001]The present disclosure relates to a method for optimizing pile-driving.BACKGROUND[0002]Conventionally, the impact energy of piles to be driven into ground by a pile-driving machine is adjusted by the driver of the pile-driving machine. This is done so that the driver of the machine follows the driving of the pile into the ground visually and / or watches measurement results produced by measuring devices monitoring the motion of the hammer ram, for example the progress of sinking (i.e. the advance) of the pile, or the load carrying capacity determined on the basis of it, and uses this to adjust the impact energy produced by the mass, i.e. block, moving inside the hammer ram (normally by adjusting the height of lifting the block). Normally, based on his experience, the driver tends to select an advance with which the total time taken for driving the pile into the ground would be as short as possible, wherein the total time taken for piling a given area or building can be mini...

AI Technical Summary

Benefits of technology

The present disclosure provides a faster and safer method for driving piles into the ground without damaging them. This is possible because the method allows for the measurement of kinetic variables during the driving process, which helps to determine the advancement of the pile. By controlling the kinetic energy of the impact, each driving impact can be made optimal to minimize the total pile driving time. The method reduces the risk of damaging the pile and ensures that the driving process is always performed in the fastest possible way, regardless of the operator's experience.

Problems solved by technology

On the other hand, if the proportion is low (the kinetic variable ratio is low), it means that a large part of the impact energy has been consumed in sinking, i.e. advancing, of the pile.

Moreover, the method according to the present disclosure reduces the risk of driving the pile using so much impact energy that the pile is damaged.

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