US 12,345,013 B2
Shaker for gentle driving of piles
Sergio Sanchez Gomez, Delft (NL); and Andrey Vladimirovich Metrikine, Delft (NL)
Assigned to TECHNISCHE UNIVERSITEIT DELFT, Delft (NL)
Appl. No. 17/638,585
Filed by TECHNISCHE UNIVERSITEIT DELFT, Delft (NL)
PCT Filed Aug. 28, 2020, PCT No. PCT/NL2020/050532
§ 371(c)(1), (2) Date Feb. 25, 2022,
PCT Pub. No. WO2021/040523, PCT Pub. Date Mar. 4, 2021.
Claims priority of application No. 2023723 (NL), filed on Aug. 28, 2019.
Prior Publication US 2022/0290396 A1, Sep. 15, 2022
Int. Cl. E02D 7/18 (2006.01)
CPC E02D 7/18 (2013.01) 14 Claims
OG exemplary drawing
 
1. A shaker for gentle pile driving comprising
a fixator for mechanically fixing a vibrator to a pile,
wherein the vibrator is adapted to provide vertical vibration of the pile at a first vibration frequency and torsion to the pile at a second torsion frequency,
wherein the vibrator comprises at least first and second groups of eccentric masses, each group comprising at least two equal masses, respectively referred to as a primary mass and a secondary mass,
wherein each individual primary mass and secondary mass of each group is positioned at a respective di distance away from a respective side of the vibrator, wherein the respective side of the vibrator spaces a respective mass from a center of the vibrator,
wherein the first primary mass and the first secondary mass is attached to a first horizontal axel,
wherein the second primary and the second secondary mass is attached to a second horizontal axel,
at least one motor, wherein the at least one motor is configured for rotating the primary and secondary masses of each group around their respective horizontal axel such that the first group of masses rotates at a same first angular velocity on the first horizontal axel, and the second group of masses rotate at an opposite second angular velocity on the second horizontal axel, wherein the first angular velocity is different from the second angular velocity, and
a controller
for driving the at least one motor,
for controlling each individual angular velocity of each respective individual group of masses,
for controlling a sum of horizontal forces produced by the respective masses, and
for balancing a sum of vertical forces produced by the respective masses.