FR2576049A1 - METHOD FOR PRODUCING A CONCRETE PIEU OR SIMILAR MATERIAL USING A FLAT TUBE COMPRISING FINS AND A TUBE FOR FURTHER USE THEREFOR - Google Patents

Abstract

THE INVENTION RELATES TO A PROCESS FOR MAKING A PILE OF CONCRETE, OR SIMILAR MATERIAL, IN THE SOIL AND A DRIVE TUBE FOR ITS IMPLEMENTATION. THIS PUNCHING TUBE IS CHARACTERIZED IN THAT IT INCLUDES A HOLLOW TUBE 1 OPEN AT LEAST AT ITS LOWER PUNCHING END 1A, PROVIDED EXTERNALLY AND LONGITUDINALLY WITH AT LEAST TWO FINS 4 OF WHICH THE LOWER EDGE 4A NEAR THE EXTERNAL END 2 OF TUBE 1 COMING IN DIRECT CONTACT WITH THE GROUND, THIS TUBE BEING PROVIDED WITH ITS PERIPHERY OF OPENINGS 6 ON EACH SIDE OF EACH FIN 4. WE THUS OBTAIN A VERY LOW PRESSURE RESISTANCE FACILITATING A BETTER RATE OF PRESSURE .

Description

METHOD FOR PRODUCING A CONCRETE PIEU OR MATERIAL

  SIMILAR USING A FILLING TUBE COMPRISING

  FINS AND TUBE OF FONCAGE FOR ITS IMPLEMENTATION.

  The present invention essentially relates to a method of producing a pile of concrete or similar material using a finned tube and a tube of

sinking for its implementation.

  Already known from Belgian Patent No. 885 931 a driving pile having fins 4 fixed or not to the outer surface of the tube 1. These fins are welded to a plate 3 directly or via a cylinder 15 forming a sinking sole that is of a

  section larger than the section of the tube itself.

  The arrangement described in this prior patent is provided so as to provide large outlet orifices 7 between the lower end 4a of the tube and the plate 3 so as to facilitate the injection of concrete into the space cleared by the insertion of the sole formed by the plate 3 section larger than the section of the tube itself. The disadvantage of such a structure lies in the fact that the sinking sole offers resistance to

  the relatively large depression, slowing down the

sinking ration.

  On the other hand, the presence of the sinking sole repels the earth and therefore does not occur a mixture

  intimate concrete or similar material with the earth near

  It is important to achieve an intimate mixing between the earth and the concrete or similar material to make a very important lifting pile. The present invention therefore relates to the new technical problem consisting in the production of a pile of concrete or similar material with high lift

  even in soft soils and with great ease of

  darkly allowing high driving speeds.

  This technical problem is solved for the first

  first time by the present invention satisfactorily. Thus, the present invention relates, according to a first aspect, to a method for producing a pile made of concrete or a similar material in the ground, comprising

  the insertion of a hollow tube into the soil provided externally

  fins, allowing the injection of a hardenable fluid material, for example a mortar, around said tube as the tube is depressed, for example by threshing, said tube being left permanently in the ground characterized in that a tube is provided

  hollow at least at its lower end of

  an outermost and longitudinally spaced portion of at least two fins whose lower edge is adjacent to the open bottom end of the tube coming into direct contact with the ground, said tube being provided at its periphery with openings for the injection of said fluid material; at least on each side of each fin; and in that said fluid material is injected as and when

  measurement of the depression of said tube inside this

  at a pressure sufficient to overcome the force of penetration of the soil within the pipe resulting from the sinking, so that said fluid material flows to

  the outside of the tube on either side of said fins.

  According to a preferred embodiment, this method

  characterized in that transverse elements are provided

  shaped troughs whose base is turned towards the

  floor, arranged at the base of the tube substantially perpendicular

  Culnarily to the tube, in which troughs is housed the lower edge of a fin, thus facilitating the flow and guiding of said fluid material along the fins and away from the tube. According to a preferred embodiment, provision is made

  a non-return valve inside said tube,

  towards its base to limit the penetration

  ground soil inside the tube.

  According to another preferred feature, the section of the fins is constant over most of

of their length.

  According to another characteristic, it is possible to provide a cylindrical envelope around the fins, which is preferably welded to the longitudinal edges of the fins,

  thus making the structure more rigorous.

  According to another characteristic, the fins are shaped in a light, preferably T-section half-beam. According to a second aspect, the present invention also relates to a sinking tube as defined above, that is to say characterized in that it includes

  a hollow tube open at least at its lower end

  undercutter, provided externally and longitudinally

  at least two fins whose lower edge adjoins the open bottom end of the tube intended to come into direct contact with the ground, said tube being provided at its periphery with openings allowing the injection of a fluid material at least each side of each fin. Similarly, preferably transverse elements shaped trough whose base is disposed closest to the lower end of the tube, are fixed substantially perpendicularly to the tube in the vicinity of its base, the lower edge of a fin being housed inside

Z576049

  corresponding height, thus facilitating the flow of

  ment and guidance of the material along the fins and

away from the tube.

  Also, it is possible to arrange, and preferably to fix, a cylindrical envelope around said fins

  thus making the structure more rigid.

  Also, preferably, the fins have a

  constant section over most of their length.

  Also, the fins can be shaped into light half-beams preferably T-section. Finally, the tube is preferably also provided.

  inside a non-return valve.

  This gives the previously announced technical advantages, namely a low resistance to penetration of the tube and a better intimate mixture between the ground and the injected curable fluid material, for example constituted by mortar or a curable synthetic resin. Moreover, preferably the height of the fins

  is two to three times the diameter of the inferior extremity

  tube, and usually this height will be

at 60 cm.

  On the other hand, the fins make a cut of the ground during the depression. In addition, the frictional forces are reduced by the flow of the material

  fluid covering the tube and the fins during driving

  is lying. Finally, after hardening of the hardenable fluid material, as indicated above, the soil, mixed

  intimately to the hardened material, such as concrete, is

  rusted between the fins and the tube by increasing the lift capacity of the pile thus formed. As a general rule, the width of the fins will be such that the wheelbase

  maximum will be three times the diameter of the tube.

  Other features and advantages of the invention

  will appear in the light of the explanatory description which

  will follow made with reference to the accompanying drawings in

which: -

  FIG. 1 shows a first embodiment of a driving pipe or pile according to the invention provided

of fins; -

  - Figure la shows a sectional view along the trace line I-I of Figure 1;

  FIG. 2 represents a second embodiment of

  sation of a pipe or driving pile according to the invention; - Figure 2a shows a sectional view along the trace line II-II of Figure 2; - Figure 3 shows yet another embodiment of a pipe or driving pile according to the invention; - Figure 3a shows a sectional view along the trace line III-III of Figure 3; and - Figure 4 shows a partial sectional view

  another embodiment of a tube or pile of

  according to the invention provided with a non-return valve.

  Referring to Figures 1.and the, according to a first embodiment of a pipe or pile driving according to the invention, designated by the general reference number 1, said tube is hollow and is open at least at its end

  bottom of the sinking having an opening 2.

  According to the embodiment shown, it can be seen that the tube 1 is provided externally and longitudinally with at least two fins 4, and here four vanes arranged at 90, whose lower edge 4a adjoins the lower end of the open tube 1 who is destined to come in

direct contact with the ground.

  According to the invention, said tube 1 is advantageously provided at its opening periphery? 6 cut into the mass of the tube near its lower end la so as to allow the injection of a curable fluid material such as mortar or a curable synthetic resin, at least on both sides

of each fin 4.

  In other words, the apertures 6 can be made beforehand by cutting at the lower end 1a of the tube 1 and then fins 4, for example by welding, are fixed so that their plane is substantially parallel to a plane of symmetry. passing through a diameter of the tube, as clearly visible in Figure la, the fin being substantially disposed at the center or symmetrically with respect to the opening 6 and with its lower edge 4a in the vicinity of the lower end la. Here, the fins 4 are flush with the extrâr tee

bottom of the tube 1.

  On the other hand, and as can be seen in FIGS. 1 and 1a, the section of the fins 4 is constant over most of their length, this section being decreasing in the direction of the tube only at the end and being able to end at a some distance from the edge of the tube, as shown, so as not to finish

the wing tip.

  Preferably, the height of the fins is 2 to 3 times the diameter of the tube, in particular near its lower end. On the other hand, preferably, the width of the fins is such that the total wheelbase of the tube 1 with the fins 4 is at most three times

the diameter of the tube.

  Thus, during the sinking, the resistance to

  cement is reduced. This resistance to penetration is all the more reduced as the curable fluid material, such as a mortar or a curable synthetic resin, is injected under pressure inside the tube, for example by a bypass 10 and comes flow outside along the tube 6 and on both sides of the fins 4 by

the openings 6.

  This will be obtained after hardening, account

  given the constant injection of the hardened fluid

  sand during driving, a pile having a total diameter of not more than three times the diameter of the pipe; therefore, about twice the diameter, the soil is locked between the fins 4 and intimately mixed with the injected material

  cured, such as concrete or a cured synthetic resin.

  The realization of such a pile is particularly suitable when there are limited working heights and

when working in soft ground.

  Referring to Figures 2 and 2a showing an alternative embodiment of the embodiment of Figure 1, the same reference number was used for

identical parts.

  It can be observed here that the only difference with respect to the embodiment of FIG. 1 lies in the fact that transverse elements 12 are further provided, shaped in the trough whose base is disposed closer to the end of the tube 1, that is to say, facing the ground. In addition, these trough elements are preferably arranged substantially perpendicular to the tube as clearly visible in Figure 2a. Also, these trough elements 12 are arranged so that the lower edge 4a of a fin 4 comes to be housed inside the trough,

  preferably substantially in the middle of it as clearly

visible in Figure 2a.

  It is thus understood that during the depression of the tube

  1 in the soil, the fluid hardenable material will have a

  and facilitated guidance along the fins 4 and spaced from the tube 1 so as to ensure an intimate mixture of this hardenable fluid material over the entire dimension of the fin. So

  the width of the trough 12 is at least equal to the width of the opening 6.

  On the other hand, the resistance to penetration will be only slightly increased by the presence of these transverse elements in the form of trough. All the advantages of the first embodiment of FIG. 1 are thus obtained with the above-mentioned additional advantage of a distribution of the curable fluid material over the entire transverse dimension or width of the fins 4. With reference to FIGS. 3a, there is shown another embodiment of the embodiment of FIG. 1 for which the same reference numerals

  were used for identical parts. We can also

  that, according to this variant, provision is made for

  cylindrical envelope 14 around the fins 4. This envelope

  cylindrical loppe is preferably welded to the fins 4, this to stiffen the device and limit the torsional forces exerted on the fins 4, it can be noted, as can be seen in Figure 4, that one can preferably provide a a slight annular flange 16 at the base of the cylindrical envelope 14 so as to minimize the forces exerted on the weld of the envelope

cylindrical on the fins 4.

  On the other hand, this rim 16 being of a limited size, the resistance to the depression will be very slightly modified compared to the first embodiment,

of Figure 1.

  On the other hand, and as can be seen in FIG. 1, the fins may be shaped into light half-beams, preferably of T-section. Finally, with reference to FIG.

  can be provided inside an anti-tamper

  return 18 formed here by the combination of a flat element 20 here substantially circular provided in its center a

  opening 22 which can be closed by a closure element

  24 held prisoner and guided by an inverted conical element 26 provided with openings 28 suitable for the passage

  correct fluid curable material.

  It is thus conceivable that this non-return valve 18

  avoids soil penetration inside the tube

when sinking it.

  Naturally, the invention is not limited to the embodiments described and shown which have been given only as examples. The invention thus comprises all the means constituting technical equivalents of the means

  described and their various combinations.

  On the other hand, it will be understood that the tube is preferably

  It is left standing in the ground and is filled with hardened material, such as synthetic concrete or concrete, resulting in maximum lift even at shallow depths.

Claims (13)

R E V E N D I C A T I - O N S   1.- Method for producing a concrete pile   or similar material in the soil, including the inser-   a hollow tube (1) provided externally with fins   (4), for injecting a fluid hardened material   sand, for example a mortar or curable synthetic material, around said tube, as and when the tube is driven, for example by threshing, said tube being left permanently in the ground, characterized in that provides a hollow tube (1) open at least at its end   lower (la) sinking, provided externally and longitudinally   at least two fins (4), whose lower edge (4) adjoins the open bottom end (2) of the tube coming into direct contact with the ground, said tube being provided at its periphery with openings (6). allowing the injection of said curable fluid material at least on either side of each fin (4), and in that said material is injected as the tube (1) is depressed at the interior of said tube with a pressure sufficient to overcome the force of penetration of the soil inside the tube (1) resulting from the sinking, so that the hardenable fluid material flows out of the   tube (1) on either side of said fins (4).   2. A process according to claim 1, characterized in that there are transverse elements (12) shaped   trough, the base of which is arranged closest to the end   lower mite (la) of the tube (1), arranged substantially perpendicular to the tube, in which trough (12) is housed the lower edge (4a) of a fin (4), facilitating the flow and the guiding the curable fluid material along the fins and away from the tube. 3. Process according to claim 1 or 2,   characterized in that a cylindrical envelope is   drique (14) around the fins (4).   4. Method according to one of claims 1   at 3, characterized in that the fins have a   constant section over most of their length.   5.- Method according to one of claims 1 to   4, characterized in that the fins are shaped in half-beams, preferably T-section. 6.- driving pipe for making a pile, characterized in that it comprises a hollow tube (1) open at least at its lower end (la) sinking, provided externally and longitudinally at least two ai] ettes (4) whose lower edge (4a) approaches the lower end (2) open of the tube (1) coming into direct contact with the ground, said tube (1) being provided at its periphery with openings (6) allowing the injection of a fluid curable material at least on both sides each fin (4).   7.- driving pipe according to claim 6, characterized in that it is provided with transverse elements (12) shaped in the trough whose base is disposed closer to the lower end (la) of the tube (1), and substantially perpendicular to the tube, in which troughs (12)   to accommodate the lower edge (4a) of a fin (4).   8.- Jacking pipe according to claim 6 or 7, characterized in that the fins (4) above have a   constant section over most of their length.   9. Jacking pipe according to claim 7 or 8, characterized in that the fins (4) have a form of a light half-beam, preferably T-section.   10. Jacking pipe according to one of the claims   6 to 9, characterized in that a cylindrical envelope (14) is arranged around the fins (4) preferably fixed by welding to it.   11. A sinking tube according to one of the   cations 6 to 10, characterized in that the length of the fins (4) is two to three times the diameter of the tube (1).   12.- Jacking pipe according to one of the   6 to 11, characterized in that the total wheelbase of the sinking tube at the fins (4) is at   maximum of two to three times the diameter of the tube (1).   13. Jacking pipe according to one of the   cations 6 to 12, characterized in that it comprises a non-return valve (18) inside the tube (1) in the vicinity from its lower part.