EP1411177A1 - Verfahren und Einrichtung zum Messen der Tragfähigkeit eines in den Boden durch Schwingung eingeführten Objektes - Google Patents

Verfahren und Einrichtung zum Messen der Tragfähigkeit eines in den Boden durch Schwingung eingeführten Objektes Download PDF

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Publication number
EP1411177A1
EP1411177A1 EP03290053A EP03290053A EP1411177A1 EP 1411177 A1 EP1411177 A1 EP 1411177A1 EP 03290053 A EP03290053 A EP 03290053A EP 03290053 A EP03290053 A EP 03290053A EP 1411177 A1 EP1411177 A1 EP 1411177A1
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EP
European Patent Office
Prior art keywords
force
vibrator
ground
centrifugal force
pile
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.)
Granted
Application number
EP03290053A
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English (en)
French (fr)
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EP1411177B1 (de
Inventor
Christian Houze
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.)
PTC SA
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PTC SA
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Publication date
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Publication of EP1411177A1 publication Critical patent/EP1411177A1/de
Application granted granted Critical
Publication of EP1411177B1 publication Critical patent/EP1411177B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D33/00—Testing foundations or foundation structures

Definitions

  • the present invention relates to a method and a device for determination of the bearing force of an object (for example a stake or a sheet pile) driven into the ground by vibratory drilling.
  • an object for example a stake or a sheet pile
  • the insertion of the object results both from the weight of the object and from its accessories, the force which may be applied to it as well as the centrifugal force of the eccentric weights of the vibrator used to generate vibrations:
  • the advantage of this solution stems from the increase in resulting sinking force and decrease in the resistance force exerted by the ground on the object.
  • this parameter interests not only the company which is responsible to push objects into the ground (piles, sheet piles, drains ...) to choose the size of the vibrator to be used, the frequency and / or amplitude of the vibrations ..., but also public works companies which are responsible for carrying out structures, for the determination of these structures, of the type of infrastructure to use, etc.
  • the method according to the invention consists to push the object (or an equivalent object) into the ground and, at least at one level determined sinking, to stop the sinking process then to exercise, over all or part of the object, an increasing driving force, detect the effort threshold from which a displacement of said object is obtained or from said part and to deduct from this effort threshold, a value corresponding to the static bearing force of the object.
  • the insertion of the object in the ground is carried out using a vibrator which can be varied centrifugal force.
  • the method according to the invention will consist in making vary the centrifugal force applied to the object, to determine a force threshold centrifugal marking the passage from a refusal to the start of penetration and to take a parameter representative of this centrifugal force (amplitude, frequency of the weights, ...) and to calculate a static load-bearing force in multiplying the parameter raised by a force proportionality coefficient static / dynamic force.
  • the variation of the centrifugal force can be obtained by a variation in the frequency of vibrations.
  • the measurement of the frequency of the vibrations as well as the determination of the vibrational moment and / or the amplitude of the vibrations (which is a direct measurement of the centrifugal force) will be made by a measuring device involving an accelerometer and a reading.
  • the above object to be driven into the ground may include two elements, namely: a first rigid element directly engaged with the vibrator and a second element guided along the first element, means being provided for ensure a controllable axial locking of the second element on the first and to exert a variable force tending to move the second element by relation to the first in a direction opposite to the direction of penetration.
  • this tubular pile 1 engages telescopically and is fixed a guide tube 7 which extends the pile 1 over a length predetermined.
  • the relative movements of the shuttle tube 8 relative to the tubular pile 1 are provided by two hydraulic cylinders V 1 , V 2 each bearing on the pile 1 and on the shuttle tube 8. These two cylinders V 1 , V 2 , which are oriented parallel to the longitudinal axis of pile 1, are diametrically opposite with respect to said axis.
  • Each cylinder is housed in a protective casing 10 integral with the shuttle tube 8 and mounted sliding along the pile 1.
  • the pile 1 may have a length of the order of 10 m and an internal section of 300 mm
  • the tube guide 7 may have a length of the order of 1.2 m and an external section substantially equal to 300 mm.
  • the shuttle tube 8 can have a length of 1 m and an internal section substantially equal to 300 mm.
  • the stroke of the cylinders V 1 , V 2 may be equal to 0.5 m.
  • the operating mode is as follows:
  • a first phase of driving the pile 1 / shuttle tube 8 is carried out using the vibrator.
  • the aim of this first phase is to reach an appropriate depth (for example 3 m) so that the friction forces exerted by the earth on the pile 1 are sufficient for the pile 1 to be able to play its role of reaction tube. Above this depth, the action of the cylinders V 1 , V 2 on the shuttle tube, risks driving the pile 1 instead of lifting the shuttle tube 8.
  • the measurement is triggered by gradually putting the cylinders V 1 , V 2 under pressure in the direction of the ascent of the shuttle tube 8 towards the pile 1.
  • the pressure value is then taken up. which causes the sliding of the shuttle tube 8 to slide on the guide tube 7. This reading makes it possible to deduce the force exerted by the two jacks V 1 , V 2 , which corresponds to the frictional force exerted by the ground on the surface of the tube shuttle 8.
  • the progressive pressurization of the cylinders can be carried out by means of a auxiliary power supply with very low constant flow.
  • representation of the pressure curve as a function of time ( Figure 6) allows to easily visualize the sliding trigger pressure. Indeed, in the absence of slipping, the pressure rises regularly then stabilizes as soon as the slip occurs.
  • the cylinders V 1 , V 2 are released and then reassembled by vibrating the pile at an intermediate level, for example 50 cm, leaving the shuttle tube in place.
  • This process is repeated in successive contiguous stages until one has reaches the desired maximum depth.
  • Figure 7 shows three measurement cycles C 1 , C 2 , C 3 respectively at 3 m, 4 m and 10 m.
  • the last measurement cycle carried out at the desired maximum depth (cycle during which the pile initially dark at this maximum depth is raised to an intermediate level (here 9.5 m)) can be completed by an additional step consisting of bringing back by driving pile 1 at the maximum depth (here 10 m) and to measure the value of the thrust of the cylinders V 1 , V 2 downwards, necessary to cause a start of downward movement of the shuttle tube 8.
  • This additional step C 4 makes it possible to measure both the contribution to the lift by lateral friction and by peak resistance.
  • the sum of the doubles of each force measured gives the all of the lateral friction on pile 1, friction to which the peak reaction to obtain the real bearing force.
  • the measurement of the pile driving in the ground is obtained by means of a graduation G carried by the pile 1 (can for example consist of marks registered on the stake every meters or 50 cm).
  • this measurement may be carried out by means of an electronic measuring device, so as to be able to obtain automatic operation of the system.
  • a cable mounted on an instrumented reel can be used, the free end is fixed to the lower end of the pile.
  • the reel can be then connected to a processor designed to determine the depth (possibly as a function of time) from the information provided by the reel.
  • winches can be instrumented so as to provide a information on the pile driving depth.

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)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Geophysics And Detection Of Objects (AREA)
EP03290053A 2002-01-14 2003-01-09 Verfahren und Einrichtung zum Messen der Tragfähigkeit eines in den Boden durch Schwingung eingeführten Objektes Expired - Lifetime EP1411177B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0200392 2002-01-14
FR0200392A FR2834791B1 (fr) 2002-01-14 2002-01-14 Procede et dispositif pour la dertermination de la force portante d'un objet enfonce dans le sol par vibrofoncage.

Publications (2)

Publication Number Publication Date
EP1411177A1 true EP1411177A1 (de) 2004-04-21
EP1411177B1 EP1411177B1 (de) 2005-11-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP03290053A Expired - Lifetime EP1411177B1 (de) 2002-01-14 2003-01-09 Verfahren und Einrichtung zum Messen der Tragfähigkeit eines in den Boden durch Schwingung eingeführten Objektes

Country Status (5)

Country Link
EP (1) EP1411177B1 (de)
AT (1) ATE310128T1 (de)
DE (1) DE60302313T2 (de)
ES (1) ES2252627T3 (de)
FR (1) FR2834791B1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009019416A1 (de) 2009-02-18 2010-08-19 Bvv Spezialtiefbautechnik Vertriebs Gmbh Vorrichtung zur Bestimmung der Tragfähigkeit eines Bodenpfahls
CN103217348A (zh) * 2013-04-12 2013-07-24 同济大学 模拟往复交通移动荷载下碎石土路基力学行为的试验装置
CN110512664A (zh) * 2019-09-27 2019-11-29 长沙理工大学 铰链式锚索框架梁加固土质边坡动力模型装置及试验方法
CN113293807A (zh) * 2021-05-19 2021-08-24 武汉大学 一种沙土结构细观试验模型

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB504625A (en) * 1937-10-27 1939-04-27 Gower Bouverie Raynor Pimm Improvements in or relating to the measurement of the resistance experienced by a pile in pile driving
GB1413160A (en) * 1972-12-20 1975-11-05 Shell Int Research Method and means for load testing openended piles penetrating the soil
US4722635A (en) * 1983-10-25 1988-02-02 Ballast-Nedam Groep N.V. Method and device for compacting soil
JPH0517943A (ja) * 1991-07-10 1993-01-26 Fujita Corp 振動打設杭の支持力測定方法
NL9200770A (nl) * 1992-04-28 1993-11-16 Hendrik Van Koten Apparaat voor het optisch en contactloos meten van de grondweerstand van heipalen tijdens heien.
US5608169A (en) * 1994-07-26 1997-03-04 Chiyoda Corporation Device and method for testing the bearing capacity of piles
DE19532931A1 (de) * 1995-09-06 1997-03-13 Karl Rainer Massarsch Verfahren zum Ausbilden von Fundamenten
EP0849405A1 (de) * 1988-12-29 1998-06-24 Takechi Engineering Co., Ltd. Methode zum Bestimmen der Kapazität und Eigenschaften von Gründungspfählen und zu deren Gestaltung, Einrichtung zum Messen der Bodeneigenschaften, Methode zum Einrichten einer Gründungspfahlgrube, insbesondere für einen vor Ort gegossenen Pfahl und Vorrichtung dafür

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB504625A (en) * 1937-10-27 1939-04-27 Gower Bouverie Raynor Pimm Improvements in or relating to the measurement of the resistance experienced by a pile in pile driving
GB1413160A (en) * 1972-12-20 1975-11-05 Shell Int Research Method and means for load testing openended piles penetrating the soil
US4722635A (en) * 1983-10-25 1988-02-02 Ballast-Nedam Groep N.V. Method and device for compacting soil
EP0849405A1 (de) * 1988-12-29 1998-06-24 Takechi Engineering Co., Ltd. Methode zum Bestimmen der Kapazität und Eigenschaften von Gründungspfählen und zu deren Gestaltung, Einrichtung zum Messen der Bodeneigenschaften, Methode zum Einrichten einer Gründungspfahlgrube, insbesondere für einen vor Ort gegossenen Pfahl und Vorrichtung dafür
JPH0517943A (ja) * 1991-07-10 1993-01-26 Fujita Corp 振動打設杭の支持力測定方法
NL9200770A (nl) * 1992-04-28 1993-11-16 Hendrik Van Koten Apparaat voor het optisch en contactloos meten van de grondweerstand van heipalen tijdens heien.
US5608169A (en) * 1994-07-26 1997-03-04 Chiyoda Corporation Device and method for testing the bearing capacity of piles
DE19532931A1 (de) * 1995-09-06 1997-03-13 Karl Rainer Massarsch Verfahren zum Ausbilden von Fundamenten

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ENGLAND M ET AL: "REVIEW OF FOUNDATION TESTING METHODS AND PROCEDURES", PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS. GEOTECHNICAL ENGINEERING, LONDON, GB, 1 July 1994 (1994-07-01), pages 135 - 142, XP002068108, ISSN: 1353-2618 *
PATENT ABSTRACTS OF JAPAN vol. 017, no. 294 (M - 1424) 7 June 1993 (1993-06-07) *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009019416A1 (de) 2009-02-18 2010-08-19 Bvv Spezialtiefbautechnik Vertriebs Gmbh Vorrichtung zur Bestimmung der Tragfähigkeit eines Bodenpfahls
CN103217348A (zh) * 2013-04-12 2013-07-24 同济大学 模拟往复交通移动荷载下碎石土路基力学行为的试验装置
CN110512664A (zh) * 2019-09-27 2019-11-29 长沙理工大学 铰链式锚索框架梁加固土质边坡动力模型装置及试验方法
CN110512664B (zh) * 2019-09-27 2024-06-11 长沙理工大学 铰链式锚索框架梁加固土质边坡动力模型装置及试验方法
CN113293807A (zh) * 2021-05-19 2021-08-24 武汉大学 一种沙土结构细观试验模型
CN113293807B (zh) * 2021-05-19 2023-08-01 武汉大学 一种沙土结构细观试验模型

Also Published As

Publication number Publication date
ES2252627T3 (es) 2006-05-16
FR2834791B1 (fr) 2004-05-14
DE60302313D1 (de) 2005-12-22
EP1411177B1 (de) 2005-11-16
DE60302313T2 (de) 2006-09-28
ATE310128T1 (de) 2005-12-15
FR2834791A1 (fr) 2003-07-18

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