EP2596177A1 - Battage de pieux - Google Patents

Battage de pieux

Info

Publication number
EP2596177A1
EP2596177A1 EP11809077.8A EP11809077A EP2596177A1 EP 2596177 A1 EP2596177 A1 EP 2596177A1 EP 11809077 A EP11809077 A EP 11809077A EP 2596177 A1 EP2596177 A1 EP 2596177A1
Authority
EP
European Patent Office
Prior art keywords
pile
vibrational
rate
vibration
driver
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP11809077.8A
Other languages
German (de)
English (en)
Inventor
David Alan Bies
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AU2010903198A external-priority patent/AU2010903198A0/en
Application filed by Individual filed Critical Individual
Publication of EP2596177A1 publication Critical patent/EP2596177A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/18—Placing by vibrating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/18—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency wherein the vibrator is actuated by pressure fluid
    • B06B1/183—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency wherein the vibrator is actuated by pressure fluid operating with reciprocating masses

Definitions

  • This invention relates to pile driving or similar such as drill string driving and is directed both to an arrangement for facilitating pile driving or the like and to a method of pile driving or the like. This description is being given in relation to pile driving but it is also applicable to drilling where the unit to be driven is a drill string with a drill head at its lower end.
  • a pile is held aligned in a direction in which it is to be embedded within the earth and there is then a conventional impacting hammer that is also aligned in the direction of the pile and it is raised and then allowed to fall on to an uppermost end of the pile to effect an impact loading thereon and thus cause the pile itself to enter further into the ground.
  • a vibrational generator when securely attached to the pile, was effective, or most effective when driven at the resonance of the combined system consisting of: the mobilized mass of the vibrational generator, the connective device attaching the vibrational generator to the pile, the pile and the substrate into which the pile penetrates, particular at the tip of said pile.
  • An object of this invention therefore is to provide an improvement in high frequency pile driving or drill stem driving or at least provide the public with a useful alternative.
  • SUMMARY OF THE INVENTION in one form there is proposed a method of driving a pile or drill string into the ground which method includes the steps of securing a vibrational driver to an upper end of the pile to be driven so that vibration of the driver in an elongate direction of the pile is effected to both push and pull the pile in correspondence to the vibrational drivers effort, and the driver is then caused to vibrate at a vibration rate sufficiently high so that the rate of vibration will be for at least some period of the vibration higher than a resonant frequency of the pile in its institu position together with its attached driver, and being sufficiently low so that the rate of vibration will be for at least some period of the vibration lower than a resonant frequency of the pile in its institu position together with its attached driver, measuring hydraulic fluid drive pressures of the driver, and effecting a raising or lowering vibrational rate in response to detect pressure characteristics I
  • a change in the vibrational rate in response to detected status is effected by an electrically generated signal which effects a change in the vibration rate.
  • an hydraulic pressure wave is detected with characteristics which can be interpreted either manually or by reference to a computer algorithm to indicate that the actual vibrational rate is either above or below a resonant vibrational frequency.
  • a resonant vibrational frequency is a natural frequency which is determined by the characteristics of the pile itself, its interchanging relationship with the soil or other earth through which it has been driven, together with the attachment mechanism and the mobilized body of the vibrational generator.
  • the resonant frequency required is a natural frequency which is determined by the characteristics of the assembly of the generator, the connection mechanism and the pile but also includes factors such as the influence of the soil into which the pile is being driven, particularly at the pile tip, and also the sides of the pile in terms of the their adhesion or even stickiness of the soil as they pass through, which may be reduced or overcome substantially through the rotation of the pile.
  • the advantage of the resonant vibrational frequency detection technique coupled with an efficient vibrational driver is that it can be assumed that such a vibrational driver can be caused to vibrate at least through a range where it is able at times to be higher than a vibrational frequency required and at other times lower than a vibrational frequency required.
  • vibrational generator By attaching the vibrational generator to a pile so that it will cause both the pile to lift and lower in response to the vibrational driver means that it is the total combination which will exhibit the characteristics needed to assess a resonant frequency appropriate for that time.
  • Figure 1 is a perspective view of a pile partially inserted into the ground and having securely affixed to the top of the pile, a vibrational pile generator, J
  • FIG. 2 is an exploded view of the elements by which in this case the vibrational power generator is secured to the top of the pile,
  • Figure 3 is a perspective view of the combination of pile driver and pile as in figure 1
  • Figure 4 is a cross sectional view of a vibrational power generator according to an earlier patent disclosure of which I was an inventor, and
  • Figure 5 is a cross sectional perspective view of the combination of the generator coupled to a pile so that they will be constrained to act together.
  • pile 1 which comprises a conventional pile constructed of a single metal member and being of elongate length and constant cross sectional shape and size along its length.
  • a vibrational power generator 2 Positively and rigidly secured to a top of the pile 1 is a vibrational power generator 2 which is secured in this way so that when the vibrational generator causes an uplift, this has a lifting effect on the pile 1 , and likewise when the vibrational generator is effecting a downward pressure, likewise the effort is also then on to the head of the pile 1 but also so that in both cases, the direction of the vibrational effort is in the elongate direction and aligned with the elongate direction of the pile 1.
  • the vibrational power generator 2 is shown in more detail in Figures 4,5 and 6 where there is a rotary valve 6 which is rotated at a frequency selected in response to perceived criteria in relation to the vibrational effect of the generator, there being hydraulic fluid being caused to pass in alternate directions by the rotation of the valve 6 to either lift or lower the piston element 7 with respect to a body 8.
  • I therefore attach a pressure meter in the hydraulic circuit and feed the resultant pressures as compared to time into an analyser which is a computer based analyser which simply compares a wave shape being received with that which is typical at resonance and will then effect a control of the rotary valve speed in the vibrational power generator 2 so that when it is lower than a perceived resonant frequency, it will then increase the speed, and when it is higher than a perceived resonant rate, it will then lower the vibrational frequency rate.
  • J is a computer based analyser which simply compares a wave shape being received with that which is typical at resonance and will then effect a control of the rotary valve speed in the vibrational power generator 2 so that when it is lower than a perceived resonant frequency, it will then increase the speed, and when it is higher than a perceived resonant rate, it will then lower the vibrational frequency rate.
  • the resonance of a pile, using an eccentric mass vibrational generator, referred to as a force source, can result in the uncontrolled or galloping oscillation of the pile and vibration generator system, due to the lack of control of the force,(which is proportional to the square of the frequency and thus cannot be altered at a given frequency, generated by the system at a target frequency, which may result in destructive accelerations and forces upon the system.
  • the resonance force and amplitude of the pile, connector and vibrational generator can be controlled and limited by the operator, independently of frequency, in a number of ways including the limiting of the capacity of the hydraulic fluid volume or restriction of the hydraulic fluid pressure, resulting in the ultimate and infinite control over the amplitude and force of vibration in safe, efficient, productive and controlled operation of the system for pile driving.
  • the advancement of the pile at resonance is hindered by the shape of the standing wave developed in the pile at resonance, consisting of a node of zero movement at the centre of the pile at the natural frequency corresponding to the first mode of vibration of the system, which will experience friction of the soils and will be thus restrained from advancement into the ground without additional benefit of any of the force of gravity, a translational force applied to the vibrational generator in the direction of desired advance or the application of rotation to the pile via the vibrational generator.
  • the vibrational generator 2 exhibits a simple exterior slidably movable cylinder which may be rotated via the biasing isolator, mounted upon a rotary bearing, capable of generating high torque and velocity to the pile for the overcoming of I
  • the combined vibration and rotation of the pile can be synchronised such that the tip, or attached bit to the pile tip, will rotate and strike, at an optimal radial advancement, a fresh piece of soil or rock, which under this timed and clocked advancement, the bit features will maximise their effectiveness in striking and breaking the soil or rock.
  • the mechanism has an advantage of producing a sinusoidal excitation with very high peak force as the frequency increases. However, this same force must be resisted by shaft bearings. This proves to be a downfall of the mechanism in that present bearing technology to the best of our knowledge is not capable of withstanding high forces at very high frequencies, in a range of interest of this application and patent. . For a device designed to operate at a single constant frequency this downfall may be managed and a functional system, at limited power, might be constructed. However, for a system that requires a variable or wide frequency range this technology fails for a number of reasons.
  • a most troubling effect of the force source lies in response of the excited system to that cyclic excitation force.
  • the coupled system prile or drill string
  • the system will act as a spring and multiply in energy as the system exchanges the elastic and dynamic energy of excitation. This may be used to conduct work with great advantage, provided the system can shed energy to the system upon which the work is done. This expenditure of energy is referred to as damping. If the work or damping is greater than the excitation energy the system is over damped and lacks the true benefit of resonance. If a system is balanced with work done equivalent to the energy introduced the system can be efficient and safe.
  • high frequency vibrators cannot use variable moment eccentric mass mechanisms and thus start from 0 Hz and pass through all frequencies to arrive at the target frequency. This generally results in the excitation of the pile driver head or drill mast, supports or other portions of the crane or base machine experiencing excitation at its natural or resonant frequency. This can result in destructive galloping oscillation of the machine components, fatigue and failure.
  • This invention is directed to a mechanism that provides a velocity source of cyclic excitation which therefore relies upon an entirely different mechanism and means of producing vibration.
  • a velocity force is generated as described by use of a piston cylinder type device to generate a cyclic load. In this manner a push pull can be produced, which, with a control valve can generate varying cyclic excitation with independent control over frequency, force and amplitude.
  • the detractions of such a device include a non sinusoidal loading history and a limited range of peak force and amplitude. The advantage of the independent control over frequency, amplitude and force far outweigh these detractions.
  • the mechanism By limiting the available flow, if the system under excitation is available to gallop and begins to do so, the mechanism will implicitly limit the runaway increase in amplitude as it chokes displacement possibly through cavitation or suction restraints.
  • the user can tune the work to limit the stress and or strain in the system and maximize the life or effectiveness of the tooling under excitation.
  • light wall pipe or drill tooling with discreet joints may be efficient to use for the purpose at hand, be it the desired final capacity of a pile or the handling of a light drill pipe.
  • the mass and strength of the pipe may be limited to certain discrete stresses or strains for a limited number of cycles.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)

Abstract

Cette invention concerne un procédé de battage dans le sol d'un pieu ou d'une tige de forage au moyen d'une sonnette vibratoire solidarisée à une extrémité supérieure du pieu ou de la tige de forage à battre dans le sol, de telle façon que les vibrations de la sonnette dans un sens de la longueur du pieu sont mises en œuvre tant pour pousser que pour tirer le pieu conformément à l'effort de la sonnette vibratoire, et le pieu ou la tige de forage est battu(e) à résonance.
EP11809077.8A 2010-07-19 2011-07-19 Battage de pieux Withdrawn EP2596177A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AU2010903198A AU2010903198A0 (en) 2010-07-19 Pile driving
PCT/AU2011/000915 WO2012009756A1 (fr) 2010-07-19 2011-07-19 Battage de pieux

Publications (1)

Publication Number Publication Date
EP2596177A1 true EP2596177A1 (fr) 2013-05-29

Family

ID=45496373

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11809077.8A Withdrawn EP2596177A1 (fr) 2010-07-19 2011-07-19 Battage de pieux

Country Status (5)

Country Link
US (1) US20130272797A1 (fr)
EP (1) EP2596177A1 (fr)
AU (1) AU2011282472A1 (fr)
CA (1) CA2805650A1 (fr)
WO (1) WO2012009756A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5167302B2 (ja) * 2010-04-01 2013-03-21 新日鐵住金株式会社 脱気工程を含む鋼杭打設工法
US20160024738A1 (en) * 2014-07-24 2016-01-28 Christopher Allen Caldwell Vibrational soil improvement
CN108344498B (zh) * 2018-03-19 2023-07-18 大连理工大学 一种基于脉冲激励差值响应分析的地基指定深度水平向动阻抗的测定装置与方法
PL4001510T3 (pl) * 2020-11-13 2023-09-11 Eurodrill Gmbh Urządzenie do generowania impulsów uderzeniowych albo wibracji dla maszyny budowlanej

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0366686B1 (fr) * 1987-06-24 1995-02-01 BIES, David Alan Generateur d'energie vibratoire
US5090485A (en) * 1987-07-30 1992-02-25 Pomonik George M Pile driving using a hydraulic actuator
GB2220988B (en) * 1988-07-22 1992-08-26 Paul Snowden An hydraulically operated impact or vibratory device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2012009756A1 *

Also Published As

Publication number Publication date
US20130272797A1 (en) 2013-10-17
WO2012009756A1 (fr) 2012-01-26
AU2011282472A1 (en) 2013-01-31
CA2805650A1 (fr) 2012-01-26

Similar Documents

Publication Publication Date Title
US9587443B2 (en) Resonance enhanced rotary drilling module
US7264055B2 (en) Apparatus and method of applying force to a stuck object in a wellbore
US9068400B2 (en) Resonance enhanced rotary drilling
US8925648B2 (en) Automatic control of oscillatory penetration apparatus
US20130272797A1 (en) Pile Driving
CA3011247A1 (fr) Ensemble d'empilement de force pour utilisation avec un systeme d'excavation souterraine
RU2740881C2 (ru) Исполнительный механизм для резонансно-усиленного вращательного бурения
US20190153800A1 (en) Systems and method utilizing piezoelectric materials to mitigate or eliminate stick-slip during drilling
GB2489227A (en) Resonance enhanced drill test rig
RU2452853C1 (ru) Способ волнового воздействия на залежь и устройство для его осуществления
US3303782A (en) Deep well sonic pumping process and apparatus
US10370901B2 (en) Steering system
JP2019124070A (ja) 支持層到達確認方法および起振装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20130117

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20170201