WO1999053147A1 - Pieu en beton et procede servant a le placer dans le sol - Google Patents

Pieu en beton et procede servant a le placer dans le sol Download PDF

Info

Publication number
WO1999053147A1
WO1999053147A1 PCT/NL1999/000209 NL9900209W WO9953147A1 WO 1999053147 A1 WO1999053147 A1 WO 1999053147A1 NL 9900209 W NL9900209 W NL 9900209W WO 9953147 A1 WO9953147 A1 WO 9953147A1
Authority
WO
WIPO (PCT)
Prior art keywords
pile
ducts
shaft
liquid medium
screwed
Prior art date
Application number
PCT/NL1999/000209
Other languages
English (en)
Inventor
Lambertus Roelof Toorenman
Original Assignee
Lambertus Roelof Toorenman
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 Lambertus Roelof Toorenman filed Critical Lambertus Roelof Toorenman
Priority to AT99914802T priority Critical patent/ATE242825T1/de
Priority to EP99914802A priority patent/EP1071854B1/fr
Priority to AU33463/99A priority patent/AU3346399A/en
Priority to DE69908768T priority patent/DE69908768T2/de
Publication of WO1999053147A1 publication Critical patent/WO1999053147A1/fr

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
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/24—Prefabricated piles
    • E02D5/32—Prefabricated piles with arrangements for setting or assisting in setting in position by fluid jets
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/56—Screw piles
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
    • E02D9/005—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof removing the top of placed piles of sheet piles

Definitions

  • the present invention relates to a concrete pile according to the preamble of Claim 1.
  • piers which piers project a certain distance above ground level and are used to support concrete structures.
  • Such piers are used to good effect, inter alia, for supporting viaducts and the like.
  • An important aspect of such piers is that it must be possible to position them in the ground within as short a time as possible and in an environmentally friendly way, in order to limit the costs and inconvenience to a minimum. Especially when building viaducts and the like, this is an important requirement, in order to minimize the disruption to traffic.
  • such piers must have a high load-bearing capacity and must be stably anchored in the ground.
  • piers have been built up by firstly positioning a number of foundation piles in the ground, on which piles a concrete baseplate or pedestal footing is arranged, and ultimately the pier is then built on top of this. It is built up either by casting concrete into the site or by assembling prefabricated elements. Consequently, anchoring and building up the pier takes a long time and entails all the adverse consequences mentioned above.
  • one object of the present invention is to provide a pier which can be anchored in the ground quickly, easily and efficiently. According to the invention, this object is achieved by means of a pile which has the characterizing features given in Claim 1.
  • a pile of this nature can be entirely prefabricated and at the desired location can simply be screwed into a solid layer of earth to the desired depth using a suitable driving tool.
  • the pile By designing the pile as a single unit, with a foundation section which can be screwed into the ground and a pier section which lies above the ground, the overall work involved in positioning the pillar can be carried out considerably more quickly than was previously possible. This is partly because the pier section, which remains visible, of the pile does not require any further work. While the pile is being screwed in, the surrounding ground is only displaced slightly, and the pile can be exposed to its full load-bearing capacity immediately after it has been set up. In addition, materials are saved, since there is no need for any formwork material in the construction. Also, there is an environmental advantage that when the pile is being screwed in, in contrast to the traditional introduction of piles, there is no need to use any polluting pile-drivers. Finally, the pile according to the - 2 - invention provides sufficient resistance to vertical and horizontal forces, as well as to moment forces, with the result that it can be used on its own.
  • pier pile is a pile with a considerable length of approximately 20-30 m and a diameter of approximately 1.5 m.
  • the pier section of the pier pile forms a single unit with the foundation section, it is of essential importance for the pier pile to be screwed into the ground in the correct (vertical) position.
  • the pier pile can be screwed into the ground by means of a suitable driving tool which drives the pier pile in rotation. It is also possible to utilize an auger which is arranged in the hollow space inside the pier pile and guides upwards the earth which enters via the open bottom end. In order to be able to discharge the earth which is guided upwards, this earth will be mixed with sufficient liquid, which liquid is preferably supplied via the hollow core of the said auger. If appropriate, the pier pile may be driven via the auger, although the auger may also be driven separately in an opposite direction of rotation, in which case the reaction forces generated by the pier pile - while it is being screwed in - on the driving tool and the underlying structure are compensated for to some extent. - 3 - The invention is explained in more detail with reference to the appended drawing, which diagrammatically depicts a preferred embodiment of the pile according to the invention.
  • Figure 1 diagrammatically shows a view of a pile according to the invention which has been screwed into the ground;
  • Figure 2 shows a side view of the bottom section of a pile according to the invention
  • Figure 3 shows a vertical section through the pile from Figure 2, with a driving member arranged inside it; and Figure 4 diagrammatically shows the top side of the pile according to the invention, with a device for supplying fluidization liquid.
  • Figure 1 shows the pier pile, which is denoted overall by reference numeral 1, in the position in which it has been screwed into the ground.
  • the pile comprises a continuous, hollow cylindrical shaft 2, which has a top pier section 2a, which lies above ground level
  • FIG. 1 diagrammatically depicts only one grouted anchor. In order to increase the mass of the pile, so as to increase its resistance to transverse forces, it is filled with grout B after it has been screwed into the ground.
  • a number of bushes H are cast into the wall of the shaft, distributed over its circumference, approximately half a metre below ground level, as can be seen from the enlarged detail I in Figure 1. These bushes in fact enclose an elongate blind hole in the said wall, for accommodating an explosive charge. In this way, the pier section of the pier pile can be separated from the foundation section, which remains behind in the ground.
  • FIG. 2 shows the bottom section of the pier pile 1, with an open bottom end 3.
  • the outside of the foundation section is provided with one or more ribs 4, 5 which extend helically along it.
  • - 4 At the open bottom end 3, each rib ends in a steel cutting edge 6, 7. In the embodiment illustrated here, the cutting edges are directed vertically and extend as far as the adjoining rib.
  • centring mandrel which is fitted into the inside of the shaft and is used to manoeuvre the pier pile which is to be screwed in to the correct position.
  • This centring mandrel comprises a hollow axle or core 9, which at its bottom end is provided with a closed, sharp point 9a. In the vicinity of this sharp point, there is an outlet opening 9b, so that liquid can be fed into the inside of the shaft via the hollow axle 9, for purposes which are to be described below.
  • a conveyor screw 10, which extends a certain distance along the axle from the said sharp point, is formed around the axle 9. The top end of the conveyor screw is surrounded by a cylindrical sleeve 11, which is fixedly connected to the external circumference of the conveyor screw.
  • the design is such that the sleeve fits into the space inside the shaft with a slight clearance, thus forming a guide for the hollow axle 9.
  • the diameter of the conveyor screw 10 decreases gradually from the bottom edge of the sleeve 11 to the sharp point 9a.
  • the centring mandrel may be arranged fixedly or removably inside the pier pile, with the point 9a, in the fitted position, always projecting a certain distance beyond the bottom, open end of the shaft and serving as a centring point.
  • the conveyor screw 10 of the centring mandrel functions as an auger for guiding the ground upwards inside the pier pile.
  • the centring mandrel is removably connected to the pier pile. After the pier pile has been positioned at a suitable depth, the centring mandrel can be removed entirely and reused for a following pier pile.
  • the said ribs 4 and 5 together form a two-start screw thread for screwing the pier pile into the ground.
  • these ribs also have the role of providing a stable and strong anchorage for the pier pile, thus conferring a high load-bearing capacity on the pier pile.
  • these ribs each have a bottom, downwardly directed surface 15 which is essentially perpendicular to the external surface of the shaft, which surface, via a bevel 15 a, merges into the external surface of the shaft.
  • a radially outer surface 16 of the rib runs virtually parallel to the external surface of the shaft, and from this radially outer surface a surface 17 runs obliquely upwards towards the external surface of the shaft.
  • the radially outer surface 16 is to some extent hollow in cross section and is covered with a steel strip 18 which is anchored in the concrete.
  • This strip 18 is used as a cutting strip in order to make it easier to screw the pier pile into the ground.
  • the aim of the concave shape is to reduce adhesion of the ground and to improve the cutting action.
  • - 5 - A number of ducts 20, which extend in the longitudinal direction of the shaft from the top edge of the pile, are distributed over the circumference of the shaft.
  • ducts which are indicated by dashed lines in Figure 3, open out on the outside of the shaft, in the area of the screw thread.
  • the purpose of these ducts is to supply a liquid medium or fluidization liquid, in order to be able to reduce the friction between the outside of the pile and the surrounding ground while the pier pile is being screwed in.
  • By varying the volume and/or pressure of liquid medium supplied locally along the circumference of the pier pile it is possible to correct the position of the pile while it is being screwed in.
  • Fig. 4 shows the top side of the pier pile, with an annular reservoir 30, which contains the liquid medium or fluidization liquid, positioned on this top side.
  • a number of metering or control valves 31 can be seen on the outside of the reservoir, which valves are each connected, on the one hand, to a feedline 32 which comes out of the reservoir, and on the other hand to a line 33, which for its part is connected to one of the longitudinal ducts 20 in the wall of the pier pile.
  • Each valve also has a return line 34 which runs from the valve to the reservoir 30, in order to return excess medium.
  • the valves 31 are distributed at intervals of 120° over the circumference. This means that there are three valves and the same number of ducts 20.
  • the annular configuration of the reservoir 30 allows the hollow axle 9 of the centring mandrel to pass through.
  • the liquid medium used is preferably water.
  • the pier pile described above is positioned in the ground by means of a driving tool, which is not shown in more detail.
  • This driving tool preferably acts at the location where the pier pile experiences most resistance when it is being screwed in, i.e. in the area of the screw thread.
  • the driving tool may act on or be connected to the centring mandrel 8.
  • the ground is cut up by the cutting edges 6, 7.
  • the ground is guided upwards by the conveyor screw 10.
  • the injection of liquid in the vicinity of the bottom, open end 3 via the hollow axle 9 and via the outlet 9b improves the conveying of the drilled earth inside the pier pile.
  • the mass of the pier pile is increased by filling the space inside the shaft with suitable mortar or grout and, if appropriate, by introducing a reinforcement.
  • the top end of the pile is then dealt with according to its desired use.
  • the top section of the pile i.e. the section above the screw thread, has a - 6 - smooth finish on its outside, so that the pier section 2a which remains visible does not require any further treatment.
  • the pile according to the invention is made from prestressed concrete and can be entirely prefabricated by means of centrifugal casting, with the cutting edges 6, 7, the ducts 20 and the cutting strips 18 which are arranged along the ribs being cast in and anchored in a suitable way.
  • the ducts 20 may be distributed in groups over the circumference, in which case the ducts of each group open out at different levels in the area of the external screw thread. Also, each duct could have a number of outlet openings lying at different levels.
  • the pile according to the invention is particularly suitable for use as a pier for viaducts and the like.
  • the pile which is entirely prefabricated, can quickly be put in position in the ground, so that the inconvenience to traffic is minimal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (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)
  • Piles And Underground Anchors (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)
  • Bulkheads Adapted To Foundation Construction (AREA)

Abstract

Pieu en béton (1) servant à supporter des structures à une certaine distance au-dessus du niveau du sol (M), telles que des viaducs ou des structures similaires. Ce pieu est caractérisé par le fait qu'il est entièrement préfabriqué et consiste en un arbre creux cylindrique (2) contenant une partie pilier (2a) et une partie fondation (2b). Cette partie fondation possède une extrémité inférieure ouverte (3) et, dans sa zone contiguë à ladite extrémité ouverte, comporte des filets (4, 5) servant à visser le pieu dans le sol. L'arbre dudit pieu contient plusieurs conduits (20) répartis sur sa circonférence et débouchant à l'extérieur de l'arbre dans la zone des filets. L'invention concerne également un procédé permettant de placer ce pieu dans le sol et consistant, pendant le vissage du pieu dans le sol, à injecter un liquide sur sa partie extérieure par l'intermédiaire des conduits (20) et à ajuster sa position en jouant localement le long de la circonférence extérieure du pieu, sur le volume et/ou la pression de l'apport en liquide.
PCT/NL1999/000209 1998-04-09 1999-04-08 Pieu en beton et procede servant a le placer dans le sol WO1999053147A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT99914802T ATE242825T1 (de) 1998-04-09 1999-04-08 Betonpfahl sowie verfahren zu seinem einbringen ins erdreich
EP99914802A EP1071854B1 (fr) 1998-04-09 1999-04-08 Pieu en beton et procede servant a le placer dans le sol
AU33463/99A AU3346399A (en) 1998-04-09 1999-04-08 Concrete pile and method for positioning it in the ground
DE69908768T DE69908768T2 (de) 1998-04-09 1999-04-08 Betonpfahl sowie verfahren zu seinem einbringen ins erdreich

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1008856 1998-04-09
NL1008856A NL1008856C1 (nl) 1998-04-09 1998-04-09 Betonnen ondersteuningspaal en werkwijze voor het in de grond aanbrengen hiervan.

Publications (1)

Publication Number Publication Date
WO1999053147A1 true WO1999053147A1 (fr) 1999-10-21

Family

ID=19766929

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL1999/000209 WO1999053147A1 (fr) 1998-04-09 1999-04-08 Pieu en beton et procede servant a le placer dans le sol

Country Status (6)

Country Link
EP (1) EP1071854B1 (fr)
AT (1) ATE242825T1 (fr)
AU (1) AU3346399A (fr)
DE (1) DE69908768T2 (fr)
NL (1) NL1008856C1 (fr)
WO (1) WO1999053147A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102518121A (zh) * 2011-11-18 2012-06-27 孙有芳 钢砼预制螺旋桩
JP2019163538A (ja) * 2018-02-28 2019-09-26 Ｊｆｅスチール株式会社 機械式ねじおよびその製造方法
WO2020201854A1 (fr) * 2019-04-03 2020-10-08 Jaron Lyell Mcmillan Perforatrice montée sur colonne à pierres sans vibration

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR501464A (fr) * 1919-07-07 1920-04-15 Louis Hocquart Pieux à vis en béton armé pour fondations
GB849413A (en) * 1957-02-13 1960-09-28 Gustave Grimaud Improved foundation pile
JPS58106012A (ja) * 1981-12-17 1983-06-24 Fudo Constr Co Ltd 中空管の貫入工法
JPS59170323A (ja) * 1983-03-18 1984-09-26 Kogen Kizai Kk コンクリ−トパイルの頭部切断方法
EP0127221A1 (fr) 1983-05-03 1984-12-05 Pieter Faber Pieu de fondation en béton et dispositif pour enfoncer celui-ci dans le sol

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR501464A (fr) * 1919-07-07 1920-04-15 Louis Hocquart Pieux à vis en béton armé pour fondations
GB849413A (en) * 1957-02-13 1960-09-28 Gustave Grimaud Improved foundation pile
JPS58106012A (ja) * 1981-12-17 1983-06-24 Fudo Constr Co Ltd 中空管の貫入工法
JPS59170323A (ja) * 1983-03-18 1984-09-26 Kogen Kizai Kk コンクリ−トパイルの頭部切断方法
EP0127221A1 (fr) 1983-05-03 1984-12-05 Pieter Faber Pieu de fondation en béton et dispositif pour enfoncer celui-ci dans le sol

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 007, no. 211 (M - 243) 17 September 1983 (1983-09-17) *
PATENT ABSTRACTS OF JAPAN vol. 009, no. 025 (M - 355) 2 February 1985 (1985-02-02) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102518121A (zh) * 2011-11-18 2012-06-27 孙有芳 钢砼预制螺旋桩
JP2019163538A (ja) * 2018-02-28 2019-09-26 Ｊｆｅスチール株式会社 機械式ねじおよびその製造方法
WO2020201854A1 (fr) * 2019-04-03 2020-10-08 Jaron Lyell Mcmillan Perforatrice montée sur colonne à pierres sans vibration

Also Published As

Publication number Publication date
AU3346399A (en) 1999-11-01
DE69908768T2 (de) 2004-05-19
NL1008856C1 (nl) 1999-10-12
ATE242825T1 (de) 2003-06-15
EP1071854A1 (fr) 2001-01-31
DE69908768D1 (de) 2003-07-17
EP1071854B1 (fr) 2003-06-11

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