NL1031876C2 - Securing reinforcing band around concrete pile, comprises securing band around set pile and then tightening or pressing it into place - Google Patents

Abstract

The band (13, 15) is secured around the at least partially set concrete pile (11) and then tightened or pressed around the pile. A hollow pile formed by extrusion or slip molding is used. The band comprises wound or intermeshed (e.g. woven) synthetic yarns (16) or metal wires and is located at a distance from the end of the pile. An independent claim is also included for a set concrete pile with at least one reinforcing band secured around one or both ends via this method.

Description

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PIPE PROVIDED WITH WEAPON TAPE

The present invention relates to a method for applying a reinforcement band along the circumference of a concrete pile and to a concrete pile provided with a reinforcement tape.

The use of piles 10 for supporting buildings has been known in the prior art for a long time.

The piles are driven into the ground on location under relatively large forces. Only a small part of the pile protrudes above the ground after pile-driving.

To prevent crumbling of the head of the pile during the pile driving it is customary to provide a pile with reinforcement reinforcement in the form of wires of reinforcing steel (spiral reinforcement). In the case of hollow concrete piles it is particularly important to provide the head with such reinforcement reinforcement since these piles 20 are particularly susceptible to crumbling during the pile driving. Hollow concrete piles have the advantage that they can be manufactured from less material than solid piles. This has a favorable effect on production costs. Furthermore, the weight is lower than that of solid piles 25, so that the transport costs are also lower. However, it is necessary to apply some form of reinforcement reinforcement to a hollow pile, this also applies to a solid pile.

From Dutch patent application NL 1022001, the provision of a reinforcement reinforcement in the inner structure of a concrete pile, more specifically a hollow pile, is known. In particular, so-called spiral reinforcement is used as reinforcement reinforcement. The disadvantage of this, however, is that for applying such a reinforcement complicated spiral winding units must be added to an extrusion machine that is already complicated in itself and that large rollers with winding wire have to be placed on a trailer. be carried away. Due to the complexity of such a device, the chance of malfunctions during the manufacture of a pile is relatively high. An additional disadvantage is that it must be determined in advance where the spiral reinforcement is to be applied. Furthermore, a relatively large amount of reinforcement material must be used, which has an unfavorable influence on the costs of the pile.

The present invention has for its object to provide a solution to the above-mentioned problems.

A first aspect of the present invention relates to a method for applying at least one reinforcement band around at least one end of a concrete structure. pile comprising providing at least a partially cured concrete pile and applying a reinforcement band around the circumference of the pile, wherein the reinforcement band is tensioned or pressed around the pile.

An advantage of this method is that it is no longer necessary to provide the reinforcement reinforcement, in particular spiral reinforcement, in the pile before or during the concreting process, such as, for example, in the head and / or the base of the pile. As a result, the so-called slip forming or extruding of a concrete hollow pile can take place relatively quickly and easily. An additional advantage is that less reinforcement material is required. This has a favorable effect on the costs of the pile. Furthermore, a great deal of freedom is obtained for determining the length of the pile, since the reinforcement band can be fitted at any desired location.

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The reinforcement band is arranged around at least one end of a concrete pile. This is preferably the upper end of the pile, i.e. the section being driven. The application of the belt prevents the end of the pile from pulverizing and / or tearing. The forces directed outwards in the concrete are thus absorbed by the piling strokes as a result of the shortening and deformation.

Furthermore, the reinforcement band can be tensioned around the circumference of the pile 10. This tensioning makes the reinforcement belt better able to absorb the forces that are released when the pile is driven into the ground. This tightening can be achieved, inter alia, by heating the tire prior to applying the tape.

It is preferable if the tensioning force is at least a third of the breaking force of the tire.

The reinforcement belt can also be applied by pressing around the pile. An advantage hereof is that the reinforcement band can be applied quickly, which has a favorable effect on the production costs. To this end, the upper part of the pile is preferably (mechanically) tapered in order to increase the dimensional accuracy.

The reinforcement belt can be pressed around the pile by, for example, slightly stretching the reinforcement belt on a mandrel and sliding it under pre-tension around the pile.

The inner circumference of the reinforcement band is hereby preferably smaller at the outset than the outer circumference of the pole.

Furthermore, it is preferable to machine the pile mechanically, in such a way that sharp corners are removed from the pile, as a result of which the material of the reinforcement strip would deform at these corner points and would break at low tensile stress.

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Furthermore, it is preferable if the pile is hollow.

An advantage of this is that the pile is relatively light. This has a favorable effect on, among other things, transport costs.

Moreover, less concrete is used, which has a favorable effect on production costs.

The hollow pile is preferably provided by means of extrusion or sludge forming. In addition to pouring into a gutter / mold, sludge molds can also be used to manufacture a massive pile. These are very effective methods or methods for manufacturing solid and hollow piles.

Furthermore, it is preferable if the tape comprises windings or a braid. The windings are herein preferably wound around the pile under bias. Metal wires are preferably used for the windings. However, the use of plastic wires is also possible. Plastic wires are preferably provided with a resin after wrapping the pile in order to hold the windings together. Furthermore, it is also possible to pre-process the threads 20 into a fabric. The advantage of such a fabric is that the wires are very well connected to each other, so that they do not shift relative to each other during or after pile-driving. Furthermore, with a fabric the number of windings can be limited and the adhesion of the winding end by gluing or applying a clamp is easier than with windings with loose wires.

The reinforcement band is preferably made of plastic or metal. An advantage of plastic is that the reinforcement band is relatively light. This has a favorable effect on, among other things, labor costs and actions. Furthermore, it is particularly preferred if the reinforcement band is made of metal, most preferably of steel. By using a 1 * 5 steel reinforcement band, relatively high loads of the reinforcement band are possible, so that relatively thin material can be used, which reduces the energy required for bending and limits the tensile stresses at the bending points.

In a preferred embodiment, the reinforcement band is arranged at some distance from the end of the pile. The advantage of this is that the pile driving device does not touch the tire during pile driving, as a result of which serious damage to the reinforcing tape and the pile, as well as the loosening of the reinforcing tape is avoided. Also when the reinforcement band is arranged at the lower end of the pile, i.e. the end that goes into the ground, it is preferable to arrange the reinforcement band at some distance from the end. The distance between the end of the pile and the reinforcement belt is preferably 0.01 to 0.50 meters, more preferably this distance is 0.01 to 0.15 meters to prevent splitting during pile-driving and from 0, 4 to 1.5 meters to prevent splitting during the so-called head racing.

It is preferable if a part of the hollow part of a hollow pile of the fully or completely cured pile is provided with a filler such that upon curing a valve is formed. As filler, use is preferably made of unhardened concrete, after which it hardens. The advantage of this is that no soil can get into the pile. Furthermore, the load-bearing capacity of the pile pile pile pile driver is increased by fitting the valve (the so-called splitting forces are limited).

The solid or hollow piles according to the invention are preferably square, hexagonal, octagonal or substantially round. The rule is that as the number of corners of the pile cross-section increases, the effect of a 6-tensioned reinforcement band to prevent splitting becomes greater.

A second aspect of the present invention relates to a hardened concrete pile, which pile is provided with at least one end with at least one reinforcement band extending around the circumference of the pile and wherein the reinforcement band is tensioned or pressed around the pile. An advantage of such a pile is that less reinforcement material is required. This has a favorable effect on the costs of the pile. Moreover, it is achieved that the head of the pile does not tear or break during pile driving.

Preferably, the tensioning force is a third part of the breaking force of the tire.

Furthermore, it is preferable if the pile is provided at at least one end with a rejuvenation around which the reinforcement band is pressed. As already indicated, this has a favorable effect on the dimensions.

Furthermore, it is preferable if the pile is substantially hollow. A hollow pile has the advantage that it is relatively light, which has a favorable effect on the transport costs and that less concrete has to be used, which has a favorable effect on the production costs.

Furthermore, it is preferred if the tape comprises windings or a braid. Metal wires are preferably used for the windings. However, the use of plastic wires is also possible. Plastic wires are preferably provided with a resin after wrapping the pile in order to hold the winding wires built up of many relatively thin wires 30 together and to protect them against mechanical damage. Furthermore, it is also possible to pre-process the threads into a fabric.

The advantage of such a fabric is that the wires are very well connected to each other, so that they do not shift relative to each other during or after pile-driving. A further advantage of a fabric is that the number of windings is limited and the adhesion of the winding end by gluing or applying a clamp is easier than with windings with loose wires.

In a preferred embodiment of the present invention, the reinforcement band comprises a perishable material, preferably a corrosive material. If it is necessary for the reinforcement band to perform a structural function after being driven into the ground, it is preferable if the reinforcement band is of non-corrosive material.

It is particularly preferred if the reinforcement band is substantially made of plastic or metal.

The advantage of plastic is that the reinforcement band is relatively light. This has a positive effect on, among other things, labor efforts and costs. Furthermore, it is particularly preferred if the reinforcement band is made of metal, most preferably of steel. Due to the use of a steel belt, relatively high loads of the reinforcement belt are possible.

In a preferred embodiment, the reinforcement band is arranged at some distance from the end of the pile. The advantage of this is that the pile driving device does not touch the tire during pile driving, whereby serious damage to the reinforcement tape and the pile is avoided. Even when the reinforcement tape is arranged at the lower end of the pile, i.e. the end 30 that goes into the ground, it is preferable to arrange the reinforcement tape at some distance from the end. Preferably the distance between the end of the pile and the reinforcement band is 0.01 to 0.50 meters, more preferably this distance is 0.01 to 0.15 meters.

It is preferred if the reinforcement band is arranged around a tapered end or in a notch in the pile. The advantage of this is that with a mechanical rejuvenation or notch the circumference becomes more accurate and sharp corners can be rounded off, so that large material stresses are limited by strong bending. An additional advantage is that no thickening can be observed on the outside of the pile, which prevents mechanical damage during storage, movements and piling.

The driven pile preferably comprises a second or further belt which extends along the circumference of the pile at a distance from the first belt. By applying a second tire, protection is also obtained of the pile against tearing or pulverizing during the so-called speeding of the head for the purpose of applying a foundation beam. A second belt can also be applied near the other end of the pile if the nature of the bottom is such that cracking or pulverization of the pile can be expected during the pile driving.

In a preferred embodiment, at least one end of the pile is provided with a concrete valve. The advantage of such a valve is that no soil can get into the pile, as a result of which, among other things, splitting forces cannot occur from the inside. Furthermore, the loading capacity of the pile pile during and after pile-driving increases by fitting the valve.

A final aspect of the present invention relates to a pile available according to the method described above.

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Mentioned and other features of the pile and the methods for applying a belt around a pile according to the invention will be further elucidated hereinafter on the basis of a number of exemplary embodiments which are only given by way of example without the invention being thereby considered to be limited. Reference is made to the attached drawings in which:

Figure 1 shows a view of a pile driving device as well as a pile pile according to the invention;

Figure 2 shows in detail a part of the pile-driving device according to the invention in side view; Figure 3 is a plan view of a hollow pile according to the invention which is provided with one reinforcement band;

Figure 4 shows in plan view a hollow pile according to the invention which is provided with two reinforcement bands 20

Figure 5 is a plan view of a hollow pile according to the invention, wherein the reinforcement band is arranged at a distance from the end. Figure 6 shows a section along the line VI-VI of the pile of Figure 5.

Figure 7 shows a substantially hollow pile according to the invention which is provided with a concrete valve 30

Figure 8 shows a section along the line VIII-VIII of the pile of Figure 7

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Figure 9 shows a schematic side view of an extruder for the manufacture of a hollow pile

Figure 10 shows a schematic side view of a slip-forming device for manufacturing a hollow pile

Figure 11 shows a hollow pile with knife bands in view.

Figure 1 shows a view of a pile driving device 1 for driving concrete piles 3 into the ground 2. For driving pile 3 into the ground 2, a so-called pile cap 4 is used. The pile driving device 1 is provided with a guide device 5. Figure 2 shows in detail a side view of the pile driving device 1 of Figure 1. The pile pile 3 is provided with a metal (steel) at its upper end 6. Tensioned reinforcement band 7. This metal reinforcement band 7 extends along the circumferential direction of the pile 3 and is tightly fitted against the outer surface of the pile 3. Because this belt 7 is arranged around the pile 3 it is prevented that the pile splits or that, among other things, the pile head is pulverized by the pile-driving device 1.

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Figure 3 shows a view of a hollow pile 8 according to the invention. The concrete pile 8 is provided, just below the upper end 9 of the pile 8, with a tensioned reinforcement band 10. This band ensures, inter alia, that when the pile is driven into the ground, the upper end of the pile 8 is not pulverized or split.

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Figure 4 shows in side view a hollow pile 11 according to the invention. The pile 11 is provided on the top side near the head 12 with a tensioned reinforcement band 13. This reinforcement band ensures, inter alia, that when the pile 11 is driven into the ground, the head 12 of the pile 11 does not split or pulverize. Furthermore, the pile 11 is also provided on the underside 14 with a tensioned reinforcement band 15. This reinforcement band 15 is made of plastic threads 16 which have been formed into a fabric. The reinforcement belts 13 and 10 are arranged so tightly around the outer surface of the pile that they can absorb the outwardly directed forces during the pile driving without the pile pile 11 pulverizing or splitting.

Figure 5 shows a hollow concrete pile 17 according to the present invention, wherein the distance "A" is the distance between the end 18 of the pile 17 and the upper side of the reinforcement band 19. The distance "A" here is approximately 0.45 meter and protects the pile against cracks and crumbling during the so-called head racing. The cavity 20 extends over almost the entire longitudinal direction of the pile 17.

Figure 6 shows in cross-section along the line VI-VI the pile of Figure 5. The hollow pile 17 is provided with reinforcement 21 which extends in the longitudinal direction of the pile 17. The reinforcement 21 extends in the solid part 22 of the concrete pile 17. Along the circumference of the pile 17 a tensioned metal reinforcement band 19, 30, preferably made of steel, is arranged. The force with which the reinforcement band 19 is tightened is at least a third of the breaking force of the steel reinforcement band 19. In this way such a force of the reinforcement band is exerted on the wall of the pile that splitting of the pile or pulverization of the pile head during pile driving can be avoided.

Figure 7 shows concrete pile 23. In the longitudinal direction, the pile 23 is provided with a cavity 24. This cavity extends in the longitudinal direction of the pile. However, at the top of the pile 23, the cavity 24 is closed with a concrete valve 25, such that a solid head 26 is formed. This concrete valve 25 is provided after the concrete pile 23 has hardened partially. To this end, part of the outside 27 of the pile 23 was removed such that access was made to the cavity 24. This cavity 24 was then filled in the portion of the head 26 with uncured concrete. In this way the solid head 26 was obtained. Because the head 26 of the pile is solid, the pile can be loaded even more by the pile block of the pile-driving device than a pile with an open head. If desired, the underside of a hollow concrete pile can also be provided with a solid part in the same way. Thanks to the solid head or underside, the pile can also be used with a less easily permeable surface. The pile is furthermore provided with a belt 28 along the circumference, which further contributes to the fact that the pile 23 does not tear or that the head 26 pulverizes during pile-driving.

Figure 8 shows in cross-section along line VIII-VIII the upper part of the concrete pile 23 of Figure 7. In the wall of the pile 23 reinforcement 29 is included in the longitudinal direction for extra sturdiness during transport and pile-driving. Furthermore, the cavity 24 at the end of the pile is provided with a concrete valve 25. This concrete valve 25 ensures that a solid head 26 has been formed. Furthermore, a reinforcement band 28 is provided in the circumference of the pile. This belt is tightened around the head 26. This reinforcement belt ensures that the pile 23 does not tear or pulverize during driving.

Figure 9 shows an extrusion device 30 for manufacturing a hollow concrete piles by means of extrusion. This device is provided with a lower mold part 31 of a molding device fixedly disposed on a supporting surface and a feed member arranged in a form relative to the lower mold part 31, in the form of a funnel 32 and a support support part 33, wherein the funnel 32 and the support support part 33 are fixedly arranged with respect to each other. The support-supporting part 33 carries via extruded parts, not shown, an extruder assembly which is provided with a bearing housing 34, a transport member in the form of a worm part 35 and a tube part 36, all such that at least the worm part 35 is rotatable about its axis 20 prepared. The funnel 32 carries on its underside an upper mold part 37 that domes the pipe part 37 and is provided at the bottom outlet of the funnel 32 with an opening 38 for bringing the uncured (liquid) concrete mixture 38 between the mold parts 31, 37. Further the lower mold part 31 is provided with means (not shown) for applying (prestressed) longitudinal reinforcement.

As the machine advances, the extruded concrete mix 38 "dries" relatively quickly such that a somewhat stable concrete mass 39 is obtained at the end of the extruder. The length of the pile is determined by sawing this mass to size after hardening. Reinforcement belts can then be applied to the desired locations.

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Figure 10 shows a slip-forming device 40 for slip-forming concrete hollow piles. The device is provided with a lower mold part 45 of a molding device fixedly arranged on a support surface and a feed members in the form of hoppers 41,42 and a support supporting part 44 which are displaceably disposed with respect to the mold part 45, the hoppers 41,42 and the hopper 41,42 support member 44 are fixedly arranged with respect to each other. The supporting support part 44 carries via horizontal parts, not shown, downwardly extending a horizontal tube which tube 46 provides the elongated cavity in the hollow pile. The whole can be transported in the longitudinal direction of the molded part 45 by means of transport means (not shown). The funnel 42 carries an upper molded part 47 on its underside which domes the pipe part 46 and is provided with an opening for the bottom outlet of the funnel. pouring concrete onto and around the pipe part 46 such that a hollow concrete pile is formed after the whole has been sawn to length.

Figure 11 shows a hollow concrete pile 48 which has been obtained with the aid of the device from figure 9 or 10. The concrete pile 48 is sawn to size along the line B-B.

Reinforcing belts 49 are provided along the circumference of the pile 48. In order to ensure sufficient rigidity during transport and pile-driving, the pile 48 is provided with longitudinal reinforcement 50.

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Claims (26)

Method for applying at least one reinforcement band around at least one end of a concrete pile comprising providing an at least partially cured concrete pile and applying a reinforcement band around the circumference of the pile, the reinforcement band being tensioned or around the pile is pressed. The method of claim 1, wherein the tensioning force is at least a third of the breaking force of the tire. 3. Method as claimed in claim 1, wherein before the pressing of the reinforcement band around the circumference of the pile, the pile is rejuvenated there. The method of any one of claims 1-3, wherein the pile is substantially hollow. 5. Method as claimed in any of the claims 1-4, wherein the hollow pile is provided by means of extrusion or slip molding. The method of any one of claims 1-5, wherein the reinforcement band comprises windings or a braid of wires. 7. Method as claimed in any of the claims 1-6, wherein the reinforcement band is substantially of plastic or metal. A method according to any of claims 1-7, wherein the reinforcement tape is arranged at a distance from the end of the pole. 9. Method as claimed in claim 8, wherein the distance between the end of the pile and the reinforcement belt is 0.01 to 0.5 meter, preferably 0.01 to 0.15 meter. 1031876 "J» 10. Method as claimed in claims 1-8, wherein at least a part of the hollow part of the pile is provided with a filler, preferably unhardened concrete. 11. Method as claimed in any of the claims 1-10, wherein the section of the pile is square, hexagonal, octagonal or substantially round. 12. Pile of hardened concrete, which pile is provided at at least one end with at least one reinforcement band extending around the circumference of the pile and wherein the reinforcement band is tensioned or pressed around the pile. Pile according to claim 12, wherein the tensioning force is at least a third of the breaking force of the tire. Pile according to claim 12., wherein the pile is provided at at least one end with a rejuvenation around which the reinforcement band is pressed. Pile according to any of claims 12-14, wherein the pile is substantially hollow. Pile according to any of claims 12-15, wherein the reinforcement band comprises windings or a braid of wires. 17. Pile according to any of claims 12-16, wherein the reinforcement band comprises a perishable material, preferably corrosive material. Pile according to any of claims 12-16, wherein the reinforcement tape comprises a non-perishable material. Pile according to any one of claims 12-18, wherein the reinforcement band is substantially of plastic or metal. Pile according to one of claims 12-19, wherein the reinforcement belt is spaced from the end of the pile. The pile according to claim 20, wherein the distance between the end of the pile and the reinforcement belt is 0.01 to 0.50 meters, preferably 0.01 to 0.15 meters. Pile according to any of claims 12-21, wherein the reinforcement band is in a notch in the pile. Pile according to any of claims 12-22, wherein a second reinforcement band extends along the circumference of the pile at a distance from the first band. 24. Pile according to one of claims 12-23, wherein at least one end of the pile is provided with a concrete valve. Pile according to any of claims 12-24, wherein the section of the pile is square, hexagonal, octagonal or substantially round. Pile pole available according to the method of claims 1-12. 1031876