EP2102418A2 - Système de fondation pour la formation d'un pieu de fondation dans le sol - Google Patents

Système de fondation pour la formation d'un pieu de fondation dans le sol

Info

Publication number
EP2102418A2
EP2102418A2 EP07860869A EP07860869A EP2102418A2 EP 2102418 A2 EP2102418 A2 EP 2102418A2 EP 07860869 A EP07860869 A EP 07860869A EP 07860869 A EP07860869 A EP 07860869A EP 2102418 A2 EP2102418 A2 EP 2102418A2
Authority
EP
European Patent Office
Prior art keywords
drill head
foundation system
drive
housing
foundation
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Withdrawn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
EP07860869A
Other languages
German (de)
English (en)
Inventor
Marinus Teunis Van Leeuwen Jr.
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.)
Gebr Van Leeuwen Harmelen BV
Original Assignee
VERTICAL DEV BV
Vertical Development BV
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
Application filed by VERTICAL DEV BV, Vertical Development BV filed Critical VERTICAL DEV BV
Publication of EP2102418A2 publication Critical patent/EP2102418A2/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Withdrawn legal-status Critical Current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
    • E02D7/26—Placing by using several means simultaneously
    • 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
    • E02D7/24—Placing by using fluid jets
    • 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
    • E02D7/28—Placing of hollow pipes or mould pipes by means arranged inside the piles or pipes
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B4/00—Drives for drilling, used in the borehole
    • E21B4/16—Plural down-hole drives, e.g. for combined percussion and rotary drilling; Drives for multi-bit drilling units

Definitions

  • the invention relates to a foundation system for the excavating in the ground of a pit to be filled with a hardenable mass for the forming after hardening of a foundation pile.
  • a foundation system in which a bucket with a scoop base is screwed into the base, which bucket is then filled with soil, after which the bucket is raised out of the ground in order to discharge the soil. This process is repeated until a desired depth has been reached.
  • the pit is filled during excavation with a bentonite-containing suspension which serves as a support liquid.
  • the bucket should be moved once downwards and upwards through the support liquid. A pit is thus gradually excavated in the ground.
  • the pit is subsequently filled with concrete which in this case expels the support liquid, so after hardening a concrete foundation pile is formed.
  • a drawback of the prior-art system is that this gradual excavation and subsequent forming of a foundation pile is a time-consuming process, soil being excavated effectively for less than 10 percent of the required time.
  • a further drawback is that the excavated soil can become contaminated with the support liquid.
  • EP 00160736 discloses a foundation system in which a bucket is provided at the lower end of a telescopically extendable tube assembly for the excavating of soil.
  • the object of the present invention is to overcome at least some of the above-mentioned drawbacks or else to provide a usable alternative.
  • the object of the invention is to provide an environmentally-friendly foundation system allowing in a broad range of soil types reliable, rapid and efficient excavation of a pit which can subsequently be filled with a hardenable mass for the forming of a foundation pile.
  • WO 03/085208 has previously disclosed a system for the forming of a foundation element in the ground, using a drill head provided with its own drive unit.
  • the drive unit is located within a housing and is powered from an energy source located above ground.
  • the drill head is in this case not connected to the lower end of a rod-like drive-in member and is not lowered into the ground by a drive-in member.
  • the drill head itself digs down into the ground.
  • tube segments are pressed into the ground with the aid of a press installation in the pit excavated by the drill head.
  • these tube segments are not intended to drive the drill head forward into the ground but rather are, if necessary, drawn into the ground along with the drill head.
  • these tube segments are intended to be left behind in the ground where they form the pit wall of the foundation element. Once the desired depth has been reached, the drill head is then removed, through the tube segments which are left behind, up out of the pit thus formed, for which purpose the drill head is configured with smaller radial dimensions than the tube segments.
  • the drill head comprises a flushing chamber which is positioned above the digging member in the housing and has a supply and discharge extending from the drill head to a position above ground.
  • the supply is used in this case for the pressurized introduction during drilling of a flushing liquid into the flushing chamber.
  • the discharge is used to discharge during drilling the supplied flushing liquid mixed with soil removed by the digging member out of the flushing chamber. Soil which is removed by the digging member passes directly into the flushing chamber. The removed soil is in this case pressed continuously into the flushing chamber by the digging member and the drill head which advances downwards together with the rod- like drive-in member. The soil which is released can mix in the flushing chamber with the flushing liquid and easily be discharged via the discharge.
  • the pressure of the flushing liquid supplied in the flushing chamber is preferably set to an excess pressure slightly higher than the prevailing groundwater pressure in the surrounding soil.
  • the excess pressure is in this case approx. 0.1 - 0.3 bar. This excess pressure ensures that the soil at the site of the digging member can be discharged in a controlled manner. This reduces the risk of undesirable disturbances in the surrounding soil and thus the risk of scouring and subsidence.
  • the use of the flushing chamber at a slight excess pressure allows the discharge rate of the soil mixture to be precisely adapted to the desired drilling speed.
  • the underside of the flushing chamber is delimited in the housing by a base plate provided with inlets. This increases the efficiency with which the flushing liquid mixes with the removed soil particles.
  • the invention also relates to a method according to claims 26 - 28, to an assembly consisting of a drive-in member and a drilling head according to claim 29 and also to a foundation pile according to claim 30.
  • Figure 4 is a view corresponding to Figure 2 containing different types of drilling members.
  • Figures 5a, b, c and d show successive steps corresponding to Figure 3 utilizing a Kelly bar and a crane installation.
  • the foundation system is denoted in its entirety by reference numeral 1.
  • the foundation system 1 comprises a rod-like drive-in member 2 formed in this case by a telescopically extendable rod.
  • the lower end of the drive-in member 2 is connected to a drill head 3.
  • the drill head 3 comprises a housing 4 containing a drive unit 5 formed in this case by a hydraulic motor, and in particular a hydraulic motor having two directions of rotation, which is powered by means of a hydraulic line 6 from a pressure reservoir located above ground.
  • the drive unit 5 connects to a drive shaft 7 which is mounted in the housing 4 so as to be able to rotate and to which a digging member 8 is connected.
  • the digging member 8 is in this case formed by a wheel dredge, located on the underside of which are a plurality of cutter heads 9 which extend downwards and between which feed-through openings are provided for allowing removed soil particles to pass upwards.
  • a pit 16 is excavated in the ground 17 by activating the drive unit 5 and at the same time lowering the drive-in member 2 into the ground.
  • an insert sleeve 18 is pressed into the ground.
  • the insert sleeve 18 serves to guide the drill head 3 during excavation of an initial portion of the pit precisely into a desired position in the ground 17 and also to prevent undesirable collapsing of the crushable pit portion. Once the drilling process has been completed, this insert sleeve 18 can, if necessary, be removed again from the ground.
  • the foundation system 1 further comprises a supply 20 for the supplying during drilling of a support liquid to the previously excavated pit portion.
  • the support liquid is, in particular, a bentonite-containing suspension.
  • the supply 20 in this case opens at the top in the excavated pit portion.
  • a possible method for the forming of a foundation pile in the ground using the foundation system 1 includes the following steps.
  • the assembly consisting of the drive-in member 2 and drill head 3 is gradually lowered into the ground using the digging member 8 which is driven in rotation.
  • a pump connected to the supply 20 is activated for gradually supplying the support liquid into the pit.
  • the rotational speed of the digging member 8, the drive-in speed of the drive-in member 2 and the pump speeds of the pumps connected to the supply and discharge are in this case precisely coordinated with one another.
  • the outer circumferential wall of the housing 4 of the drill head 3 enters during excavation of the remainder of the pit 16 into direct contact with the surrounding soil 17.
  • the drive-in member 2 is telescoped, as a result of which the drill head 3 is brought back upwards through the support liquid 1.
  • a reinforcement can, if necessary, be attached in the excavated pit and a hardenable foundation mass is conveyed into the pit 16.
  • the support liquid will in this case be displaced upwards out of the pit 16.
  • the support liquid is pumped out of the pit and stored for subsequent use at the same time as the hardenable foundation mass is supplied.
  • FIG. 2 shows an alternative embodiment of the drill head.
  • the drill head 30 comprises in this case a housing having a cylindrical circumferential wall part 31.
  • the housing contains a mounting flange 32 on which a drive 33 is mounted for the driving of a digging member 36 mounted on a drive shaft 35.
  • the drive 33 is in this case formed by a hydraulic motor.
  • the hydraulic motor has the advantage that it takes up little space, can produce a high output and is not sensitive to moisture and dirt.
  • the upper side of the hydraulic motor can be connected to a hydraulic feed line (not shown) .
  • Located below the mounting flange 32 is a base plate 40 provided with inlets. A flushing chamber 43 is delimited between the mounting flange 32 and the base plate 40.
  • a supply (not shown) for the supplying at a slight excess pressure of a flushing liquid and a discharge 45 for the discharging from the flushing chamber 43 of the supplied flushing liquid mixed with the soil particles removed by the digging member 36.
  • the removed soil is automatically pressed into the flushing chamber 43 via inlets in the digging member 36 and the base plate 40 respectively.
  • the flushing chamber the removed soil particles mix with the flushing liquid and this mixture can be conveyed upwards to outside the excavated pit via the discharge 45.
  • the flushing liquid enters the flushing chamber 43 via the supply, strikes the base plate 40 and then sprays up on all sides. The resulting vortex advantageously ensures thorough mixing of the flushing liquid with the soil.
  • the inlets are preferably configured so as to widen toward the top. As a result, the soil particles entering the inlets will pass into the flushing chamber 43 as they are discharged.
  • a bypass containing an activatable valve can be provided between the supply and the discharge 45.
  • the supply and discharge also contain activatable valves. The pipes can be efficiently flushed by activating these valves in a suitable manner.
  • the drill head 30 further comprises on its upper side a second digging member 50.
  • the digging member 50 can be driven by a drive 51 which in this case is also formed by a hydraulic motor.
  • a cover plate 52 provided with inlets is located below the digging member 50.
  • a second flushing chamber 54 extending annularly around the drive 51. Also provided on this flushing chamber 54 are a supply (not shown) for the supplying at a slight excess pressure of a flushing liquid and a discharge 55 for the discharging from the flushing chamber 54 of the supplied flushing liquid mixed with soil particles removed by the digging member 50.
  • the drive 33 for the first digging member 36 is disconnected and the supply and discharge 45 after the flushing chamber 43 are shut off.
  • the drive 51 before the second digging member 50 is activated and the supply and discharge 55 after the second flushing chamber 54 are activated.
  • the drill head 30 can be drawn upwards out of the pit 60 by means of the rod-like drive-in member 57 (Fig. 3d) .
  • the second digging member 50 in this case also eliminates any non-uniformity from the bore hole located above the drill head 30.
  • the digging member comprises a plurality of fold-in digging elements 70 distributed over the circumference.
  • the fold-in digging elements 70 extend in the radial direction as a kind of spoke and are able to hinge about hinge pins 71 connected to the remainder of the digging member.
  • the digging elements are thus free to automatically hinge downwards as soon as the drill head 30 is raised.
  • the digging elements 70 are free to automatically hinge upwards to a folded-out position as soon as the drill head 30 is placed on the ground and drilling is commenced.
  • This has the advantage that, in the folded-out position, the digging elements 70 can have radial dimensions which are somewhat larger than the remainder of the drill head, whereas in the folded-in position they assume smaller radial dimensions.
  • the digging elements 70 do not obstruct the drill head as it is drawn upwards out of the ground, thus reducing the risk of damage to the excavated drill pit wall and allowing the withdrawal forces advantageously to be reduced.
  • the drill head 30 can also be rotated while the outer tube is fixed. This also gives rise to engagement. Disengagement can be carried out by rotating the drive 81 or the drill head 30 respectively in the opposite direction.
  • Figure 5c shows a position in which two inner tubes 84, 85 are guided out of the outer tube 82 and engage with respect thereto, after which the crane installation 80 has lowered the engaged tube assembly into the ground over a specific stroke while driving the drill head 30.
  • the installation for the lowering into the ground of the drive-in member together with the drill head is preferably configured to act on the outer circumferential wall of the drive-in member. It is also possible to provide in the drill head a different type of drive unit, for example an electric drive such as an electric motor.
  • the digging member preferably has radial dimensions which are greater than or equal to those of the outer circumferential wall of the housing of the drill head.
  • the digging member may be of a different type.
  • the drill head has, in particular, radial dimensions larger than those of the drive-in member. More particularly, the outer circumferential wall of the housing of the drill head has radial dimensions which are at least two times larger than those of the drive-in member.
  • the outer circumferential wall of the housing can have any desired shape.
  • the housing is cylindrical in its configuration.
  • the outer circumferential wall of the drill head rests against the surrounding soil of the pit excavated by the digging member and thus reinforces the pit wall owing to the sliding forces which are produced.
  • the outer circumferential wall is not in direct contact with the surrounding soil. This advantageously restricts the forces required.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Geology (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Piles And Underground Anchors (AREA)

Abstract

L'invention concerne un système de fondation destiné à excaver le sol d'un puits à remplir d'une masse durcissable afin de former après durcissement un pieu de fondation, comprenant un élément de type tige à enfoncement (2), une tête de forage (3) reliée à l'extrémité inférieure de l'élément à enfoncement (2), une installation destinée à abaisser dans le sol l'élément à enfoncement (2) avec la tête de forage (3). La tête de forage (3) comprend un logement (4) possédant un arbre d'entraînement (7) pouvant être mis en rotation par rapport au logement (4), une unité d'entraînement (5) destinée à mettre en rotation, par entraînement de l'arbre d'entraînement (7), au moins un élément de creusage (8) positionné sur la partie inférieure de la tête de forage (3) et placé dans le logement (4), une unité d'alimentation (6) s'étendant de la source d'énergie au-dessus du sol vers l'unité d'entraînement (5) dans le logement (4) de la tête de forage (3).
EP07860869A 2006-12-13 2007-12-11 Système de fondation pour la formation d'un pieu de fondation dans le sol Withdrawn EP2102418A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1033050A NL1033050C2 (nl) 2006-12-13 2006-12-13 Funderingsysteem voor het vormen van een funderingspaal in de grond.
PCT/NL2007/000306 WO2008072950A2 (fr) 2006-12-13 2007-12-11 Système de fondation pour la formation d'un pieu de fondation dans le sol

Publications (1)

Publication Number Publication Date
EP2102418A2 true EP2102418A2 (fr) 2009-09-23

Family

ID=38191144

Family Applications (2)

Application Number Title Priority Date Filing Date
EP07860870A Withdrawn EP2102419A2 (fr) 2006-12-13 2007-12-11 Tête de forage destinée à l'excavation dans le sol d'un trou, et système de fondation pour former un pieu de fondation dans le sol
EP07860869A Withdrawn EP2102418A2 (fr) 2006-12-13 2007-12-11 Système de fondation pour la formation d'un pieu de fondation dans le sol

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP07860870A Withdrawn EP2102419A2 (fr) 2006-12-13 2007-12-11 Tête de forage destinée à l'excavation dans le sol d'un trou, et système de fondation pour former un pieu de fondation dans le sol

Country Status (3)

Country Link
EP (2) EP2102419A2 (fr)
NL (1) NL1033050C2 (fr)
WO (2) WO2008072951A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2007882C2 (en) * 2011-11-28 2013-05-30 Van Leeuwen Harmelen Bv Geb Excavator for discharging bottom parts from a bottom floor.
EP2703596B1 (fr) * 2012-08-31 2015-02-18 BAUER Maschinen GmbH Dispositif de forage et procédé d'établissement d'un forage
EP2730703B1 (fr) * 2012-10-15 2015-03-25 BAUER Maschinen GmbH Procédé et dispositif destinés à l'établissement d'un élément de fondation
EP2743403B1 (fr) * 2012-12-12 2015-03-25 BAUER Maschinen GmbH Dispositif et procédé destinés à l'établissement d'un élément de fondation
CN113640046A (zh) * 2021-08-17 2021-11-12 茆荣 一种土壤检测用的分层取样系统

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Publication number Priority date Publication date Assignee Title
JPS5117201B1 (fr) * 1971-05-13 1976-06-01
IT1125326B (it) * 1979-02-21 1986-05-14 Casagrande & C Spa Perfezionamenti alle colonne telescopiche per fondazioni e colonne telesopiche per fondazioni cosi' perfezionate
US4330155A (en) * 1980-03-26 1982-05-18 Santa Fe International Corporation Bore hole mining
DE3516312C1 (de) * 1985-05-07 1986-10-16 Gesellschaft für Strahlen- und Umweltforschung mbH München, 8042 Oberschleißheim Bohrmaschine mit einem ueber ein verlaengertes Bohrgestaenge antreibbaren Bohrkopf
US5378085A (en) * 1993-10-01 1995-01-03 S. M. W. Seiko Methods for in situ construction of deep soil-cement structures
JP2505977B2 (ja) 1993-12-03 1996-06-12 成幸工業株式会社 地下連続壁の形成方法
NL1021143C2 (nl) * 2002-04-04 2003-10-07 Van Leeuwen Harmelen Bv Geb Werkwijze voor het aanbrengen van ten minste één funderingspaal in de Werkwijze voor het aanbrengen van ten minste één funderingspaal in de grond. grond.
AT501696B1 (de) * 2004-03-30 2008-03-15 Alwag Tunnelausbau Gmbh Verfahren und vorrichtung zum bohren von löchern in boden- oder gesteinsmaterial

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2008072950A3 *

Also Published As

Publication number Publication date
WO2008072950A3 (fr) 2008-07-31
NL1033050C2 (nl) 2008-06-16
WO2008072951A2 (fr) 2008-06-19
WO2008072951A3 (fr) 2008-08-07
EP2102419A2 (fr) 2009-09-23
WO2008072950A2 (fr) 2008-06-19

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