Pile-driving ram and method of controlling the same
AssigneeVan Kooten B.V.
InventorHans Gunther Schnell
Life of this patent
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Abstract
In a method of regulating the supply of driving-medium per stroke cycle to a pile-driving rammer the driving-medium supply per stroke cycle is adjusted for driving piles into the ground in the shortest time in dependence upon the value, measured by at least one scanner, of the result of at least two preceding strokes of the rammer and more in accordance with the driving-medium supply adjusted during the stroke which gave the better result. In order to improve the energy transfer from a diesel hammer upon the pile apart from a basic fuel per combustion cycle at least one substance affecting the combustion velocity is supplied to the Diesel hammer in accordance with the pile-driving operation.
Claims32
A method of regulating the supply of fuel per stroke cycle to a pile-driving Diesel rammer, comprising the steps of measuring a parameter of the pile during each stroke of the rammer;
- adjusting the fuel supply per stroke according to the value of said parameter, measured during at least two preceding strokes of the rammer and more in accordance with the fuel supply adjusted during the stroke which gave the better result;
- said measuring step comprising measuring the value of the energy induced in the pile by a rammer stroke and integrating the measured value over time.
A method of regulating, during a pile driving process, the fuel supply per combustion cycle to a Diesel rammer during its continuous driving operation comprising the steps of supplying a basic fuel and at least one substance affecting the combustion velocity during combustion cycles to the Diesel hammer after the starting ignition of the hammer and completion of the starting cycle thereof.
A method of regulating, during a pile driving process, the fuel supply per combustion cycle to a Diesel rammer comprising the steps of supplying a basic fuel and at least one substance affecting the combustion velocity during combustion cycles to the Diesel hammer after starting the hammer;
- said step of supplying a substance affecting the combustion velocity comprising the step of supplying a greater or smaller quantity of fuel decelerating the combustion or a greater or smaller quantity of fuel accelerating the combustion to the Diesel hammer in accordance with the pile driving operation.
A method of regulating, during a pile driving process, the fuel supply per combustion cycle to a Diesel rammer comprising the steps of supplying a basic fuel and at least one substance affecting the combustion velocity during combustion cycles to the Diesel hammer after starting the hammer, wherein when in a pile-driving operation involving the risk of excessively rapid combustion, said supplying step comprises supplying a smaller quantity of combustion-decelerating substance as the risk of excessively rapid combustion decreases.
A method of regulating, during a pile driving process, the fuel supply per combustion cycle to a Diesel rammer comprising the steps of supplying a basic fuel and at least one substance affecting the combustion velocity during combustion cycles to the Diesel hammer after starting the hammer;
- wherein when in a pile-driving operation involving the risk of an excessively slow combustion, said supplying step comprises supplying a greater quantity of combustion-accelerating substance as the risk of excessively slow combustion increases.
A Diesel rammer for driving a pile into the ground comprising:
- a cylinder including a piston slidably positioned therein;
- at least one fuel supplying means for suppling fuel to said cylinder;
- control means for regulating said fuel supply including an output connected to said fuel supply means;
- measuring means for measuring energy induced into said pile, said measuring means including an integrator means for integrating the energy induced per stroke of the Diesel rammer, said integrator having an output;
- at least one memory means connected to said output of said integrator means and to said output of said control member;
- and comparator means connected to said memory means, to said output of said integrator means and to said output of said control means, for comparing the results of at least two hammer strokes and their respective adjustments of the fuel supply, said comparator having an output providing an output signal for affecting said fuel supply.
Dependencies are inferred from the claim text.