Insertion device for inserting a foundation element

Abstract

The invention relates to an installation device for inserting a foundation element into the ground, in particular a vibrator or sheet pile press, comprising a force-generating device designed to generate a force for driving the foundation element into the ground in an insertion direction, and a clamping device arranged on an underside of the force-generating device and designed for clamping the foundation element, wherein the clamping device has a clamping bracket for attachment to the force-generating device and two clamping jaws arranged on the clamping bracket, and wherein at least one clamping jaw is displaceable in a clamping direction transverse to the insertion direction by means of a clamping drive for clamping the foundation element.According to the invention, the clamping block has at least one inner recess spaced apart from the clamping jaws, which extends inside the clamping block and is bounded by at least two side wall areas which extend along the insertion direction and are opposite each other transversely to the insertion direction.

Description

[0001] The invention relates to an installation device for inserting a foundation element into the ground, in particular a vibrator or sheet pile press, comprising a force-generating device designed to generate a force for driving the foundation element into the ground in an insertion direction, and a clamping device arranged on an underside of the force-generating device and designed for clamping the foundation element, wherein the clamping device has a clamping bracket for attachment to the force-generating device and two clamping jaws arranged on the clamping bracket, and wherein at least one clamping jaw is displaceable in a clamping direction transverse to the insertion direction by means of a clamping drive, according to the preamble of claim 1.

[0002] A generic driving device, designed as a vibrator or vibratory pile driver, is described, for example, in EP 3 228 392 A1, US 2013 / 272798 A, or EP 3 708 714 A1. Such driving devices are used for driving foundation elements, in particular piles or sheet piles, into the ground. For this purpose, the foundation element is clamped to the underside of the power generation device by means of a clamping device. The power generation device produces directed vibrations with which the foundation element is driven or driven into the ground. The driving device can be mounted on a mast, in particular a pole, of a carrier vehicle, which can apply an additional driving force.

[0003] The clamping block according to the generic state of the art has lateral mounting flanges by means of which the clamping device is detachably attached to the underside of the power generating device via inserted mounting screws.

[0004] An insertion device can also be used in reverse to pull a foundation element out of the ground.

[0005] Similar clamping devices can also be used on other installation devices for foundation elements, such as pile drivers for driving foundation elements or sheet pile presses, in which sheet piles are driven into the ground as foundation elements. One such sheet pile press is described, for example, in EP 1 752 582 B1.

[0006] Overall, high forces are applied to drive in the foundation element, which can be up to 10 meters long or more, in order to drive the foundation element against the resistance of the soil and the frictional forces generated along its length to the desired depth. These high forces must be absorbed and transferred by the clamping device to which the foundation element is attached.

[0007] According to the state of the art, the clamping devices are equipped with a correspondingly robust clamping block on which clamping jaws are mounted. The clamping device is largely made of high-strength tool steel and can reach a mass of several hundred kilograms.

[0008] The invention is based on the TaskThe aim is to specify an installation device and a method for this purpose, with which a foundation element can be efficiently installed into the ground with the simplest possible design of the installation device.

[0009] The problem is solved, firstly, by an insertion device having the features of claim 1 and, secondly, by a method having the features of claim 15. Preferred embodiments of the invention are specified in the dependent claims.

[0010] The insertion device according to the invention is characterized in that the clamping block has at least one inner recess spaced apart from the clamping jaws, which extends inside the clamping block and is bounded by at least two side wall areas which extend along the insertion direction and are opposite each other transversely to the insertion direction.

[0011] The invention is based on the understanding that for efficient force transmission between the force-generating device and the clamped foundation element, a clamping device is advantageous in which the clamping block is not solid and block-like, but rather designed with free side wall areas for targeted energy transmission. According to a finding of the invention, this is achieved by the clamping block having at least one internal recess, which is bounded by at least two side wall areas extending along the insertion direction and opposite each other transversely to the insertion direction.

[0012] Extensive topology studies and modal analyses have shown that the inner areas of a clamping block contribute very little to energy transfer compared to the side wall areas. In fact, massive inner areas, especially when transmitting vibrations due to internal friction, can even lead to an undesirable internal damping effect.

[0013] The design according to the invention, with at least one internal recess forming at least two side wall areas, enables particularly efficient energy transfer. Furthermore, significant material savings of up to 25% or more can be achieved in the design of the clamping block. Even with smaller, conventional clamping devices, this can translate into a weight saving of approximately 75 kg. With larger clamping devices, weight savings of up to several hundred kg can be realized.

[0014] The design according to the invention thus not only reduces the material required for manufacturing, but also enables more efficient operation of the driving device with a greater amplitude in vibrators with a vibration drive and more efficient and longer driving distances. This means that foundation elements can be driven deeper into the ground with the same drive power.

[0015] A preferred embodiment of the invention consists in the at least one recess being designed as a passage extending from a first end face of the clamping block to an opposite second end face of the clamping block. The passage can extend in a transverse direction or, more preferably, in a longitudinal direction. The transverse and longitudinal directions extend perpendicular to the insertion direction. The passage can be open at the top or partially or completely closed at the top by a cover area of ​​the clamping block. In the installed position, an upwardly open passage on the clamping block is covered at the bottom by the force-generating device, so that even in this embodiment a tunnel-like passage with high rigidity is formed.

[0016] A further advantageous embodiment of the invention lies in the fact that at least one recess is arranged symmetrically to a longitudinal center plane and / or a transverse center plane of the clamping block. Such a symmetrical design of the clamping block achieves an equal or largely equal load distribution on both sides of the plane of symmetry. This promotes efficient force transmission and protects the overall structure. The longitudinal center plane can be the vertically extending plane in which the clamping axis lies, i.e., in the direction of the clamping movement.

[0017] According to a further embodiment of the invention, it is preferred that at least one recess in the cross-section has a V-shaped or U-shaped contour. The side walls of this contour extend in the insertion direction and enable particularly good force transmission from the force-generating device to the clamped foundation element.

[0018] A particularly weight-saving and efficient design is achieved according to a further development of the invention by forming one or more recesses which run in one direction of the clamping block.

[0019] A particularly advantageous embodiment of the insertion device according to the invention can be further achieved by providing a central passage in one longitudinal direction of the clamping block and at least two spaced-apart passages in one transverse direction of the clamping block. This allows for a particularly high weight reduction while maintaining high rigidity of the clamping block.

[0020] In particular, according to a further development of the invention, it is advantageous that at least one side wall area is formed by wall webs which are spaced apart from one another by recesses. In particular, this results in a web-like structure instead of a solid clamping block, wherein the individual material webs are separated from one another by the recesses or passages and, with high stiffness and simultaneously reduced dynamic mass, enable efficient energy transfer from the force-generating device to the clamped foundation element.

[0021] For efficient fastening, one embodiment of the invention provides that the side wall regions each transition into a fastening strip at their upper end regions, which is designed for the detachable fastening of the clamping block to the force-generating device. In particular, one or preferably several through holes for fastening screws can be arranged along each fastening strip. The clamping block can thus be detachably fastened to an underside of the force-generating device in a particularly efficient manner.

[0022] According to a further development of the invention, it is advantageous that the installation device is designed as a vibrator, with the power generation device being designed as a vibration generator. With such a vibrator, the foundation element to be installed can be set into vibration, thereby bringing the soil adjacent to the foundation element into a quasi-liquid state. In this state, the foundation element can be efficiently driven into the ground. The foundation element can be a pile, a steel beam, or a sheet pile.

[0023] It is particularly advantageous for the vibration generator to have at least one rotating, driven unbalance unit or at least one piston unit with a reversible piston. These two different types of vibration generators can efficiently produce vibrations for a vibratory roller or a vibratory hammer.

[0024] A further advantageous embodiment of the invention lies in the fact that the installation device is designed as a sheet pile press, wherein the force-generating device comprises at least one pressure cylinder for generating a driving force. In particular, a hydraulic cylinder or an arrangement of hydraulic cylinders can be arranged, which are supported against a carrier device on one side and connected to a support yoke on the other. The support yoke can be considered part of the force-generating device, on the underside of which one or more clamping devices according to the invention are then arranged.

[0025] In principle, the insertion device can also be designed in other suitable ways for driving in a clamped foundation element.

[0026] A further advantageous embodiment of the invention consists in the fact that the clamping bracket is adjustable, in particular rotatable, and mounted on the underside of the force-generating device. This can enable adjustment of the foundation element to be installed, which is particularly advantageous in the case of sheet pile walls.

[0027] In principle, a single clamping device can be provided for a single foundation element. Particularly when using sheet piles, one embodiment of the invention finds it advantageous to arrange several clamping devices side by side. This allows, in principle, several foundation elements to be installed parallel to each other in a single operation.

[0028] According to a further embodiment of the invention, it is preferred that the power generation device is slidably mounted and guided on a mast that is essentially vertical during operation and is arranged on a support device. The power generation device can, in particular, be attached to a carriage that is slidably guided along the mast. A mast with such longitudinal guidance can also be referred to as a masthead. A vertical force can additionally be exerted along the mast from the support device onto the power generation device via a corresponding displacement device. This allows an installation force to be exerted in addition to the weight of the foundation element and the power generation device. In particular, the installation device can thus also exert a force to pull the foundation element out of the ground.

[0029] The invention further relates to a method for inserting a foundation element, in particular a pile or a sheet pile, into the ground, wherein the method is characterized in that the previously described insertion device according to the invention is used for driving the foundation element into the ground.

[0030] The method thus allows the previously described advantages of using the insertion device according to the invention to be achieved. In particular, it enables the efficient insertion of a foundation element into the ground, as well as the efficient extraction of a foundation element from the ground.

[0031] The invention is further explained below with reference to a preferred embodiment, which is shown schematically in the drawings. The drawings show: Fig. 1 a first perspective view of a clamping device according to the invention; Fig. 2 a view of the clamping device of Fig. 1 from the rear; Fig. 3 a side view of the clamping device of the Figures 1 and 2 Fig. 4 a view of the clamping device of the Figures 1 to 3 from the front; Fig. 5 a view of the clamping device of the Figures 1 to 4 from above; Fig. 6 another perspective view of the clamping device of the Figures 1 to 5 ; and Fig. 7 a side view of an insertion device according to the invention with a carrier device.

[0032] A clamping device 30 with a clamping block 32 for the invention is described in the Figures 1 to 6The clamping block 32, which may be made of tool steel, has a first clamping jaw 51 and an opposing clamping jaw 52, ​​which may be fixedly attached to the clamping block 32. The first clamping jaw 51 is displaceable relative to the second, fixed clamping jaw 52 by means of a clamping drive 50, which may be a hydraulic cylinder, for clamping a foundation element (not shown), such as a sheet pile. The clamping block 32 has two mounting strips 46 on its upper side, by means of which the clamping block 32 can be detachably attached to the underside of a force-generating device, such as a vibrator, by means of screw bolts. The two mounting strips 46 may preferably be connected to a cover plate 41.

[0033] According to the invention, the clamping block 32 is constructed in a web-like manner, wherein, in the illustrated embodiment, two side wall regions 34 are formed, between which a V-shaped recess 37 in cross-section is formed in the longitudinal direction as a first passage 40. The V-shaped passage 40 extends from a first end face 35 of the clamping block 32, to which the clamping drive 50 is attached, to the opposite second end face 36 of the clamping block 32.

[0034] The lateral and longitudinally extending side wall sections 34 are each interrupted by two transversely extending recesses 38, 39, which each intersect the passage 40. This divides the two side wall sections 34 into a first front wall web 42, a second middle wall web 43, and a third rear wall web 44. The first transverse recess 38 has an approximately square or parallelogram-shaped cross-section. The second transverse recess 39 is polygonal with a downward projection towards the fixed second clamping jaw 52. Thus, the rear wall web 44, viewed from the rear, has a Fig. 2 It depicts a Y-shaped contour.

[0035] The upper cover plate 41 can be continuous or as shown in the Figures 5 and 6The cover plate 41 can be removed and is provided with two approximately semicircular recesses. This allows for additional weight savings. Alternatively, the cover plate 41 can also be divided into webs or omitted entirely.

[0036] An insertion device 10 according to the invention can form a complete device and can be arranged according to Fig. 7 The carrier device 12 comprises a crawler chassis as an undercarriage and a superstructure rotatably mounted thereon. A mast 14 can be pivotally articulated to the superstructure of the carrier device 12. This mast can be designed as a pole with a lower mast section 15, along which a upper mast section 16 can be vertically guided. A linear guide 17 can be provided along a front face of the upper mast section 16, along which a vibration generator according to the invention can be guided as a force-generating device 20 by means of a guide device.

[0037] The power generation unit 20 can be detachably coupled at its upper side to a feed slide 18 via a quick-release coupling. The feed slide is movable along the linear guide 17 of the mast 14 via a feed mechanism. Hydraulic oil can be supplied from the carrier unit 12 along the mast 14 to the power generation unit 20 via lines 19. In the illustrated embodiment, the power generation unit 20 can be designed as a vibrator with rotating, driven eccentric weights.

Claims

1. Introduction device for introducing a foundation element into the ground, in particular a shaker or sheet pile press, having - a force generating device (20) which is configured to generate a force for driving the foundation element into the ground in an introduction direction, and - a clamping device (30) which is arranged on an underside of the force generating device (20) and is configured to clamp the foundation element, wherein the clamping device (30) has a clamping bracket (32) for attachment to the force generating device (20) and two clamping jaws (51, 52) which are arranged on the clamping bracket (32), and wherein at least one clamping jaw (51) for clamping the foundation element by means of a clamping drive (50) is displaceable in a clamping direction directed transversely to the introduction direction, characterised in that the clamping bracket (32) has at least one inner recess (37, 38, 39) spaced apart from the clamping jaws (51, 52), which recess extends in the interior of the clamping bracket (32) and is bounded by at least two side wall regions (34) which extend along the introduction direction and are opposite transversely to the introduction direction.

2. Introduction device according to claim 1, characterised in that the at least one recess (37) is formed as a passage (40) which extends from a first end side (35) of the clamping bracket (32) to an opposite second end side (36) of the clamping bracket.

3. Introduction device according to claim 1 or 2, characterised in that at least one recess (37, 38, 39) is arranged symmetrically with respect to a longitudinal centre plane and / or a transverse centre plane of the clamping bracket (32).

4. Introduction device according to any one of claims 1 to 3, characterised in that at least one recess (37) has a V-shaped or U-shaped contour in cross section.

5. Introduction device according to any one of claims 1 to 4, characterised in that one or more recesses (38, 39) are formed which run in a transverse direction of the clamping bracket (32).

6. Introduction device according to any one of claims 1 to 5, characterised in that a central passage (40) is formed in a longitudinal direction of the clamping bracket (32) and at least two recesses (38, 39) spaced apart from one another are formed in a transverse direction of the clamping bracket (32).

7. Introduction device according to any one of claims 1 to 6, characterised in that at least one side wall region (34) is formed by wall webs (42, 43, 44) which are spaced apart from one another separated by recesses (37, 38, 39).

8. Introduction device according to any one of claims 1 to 7, characterised in that the side wall regions (34) pass over at their upper end regions in each case into a fastening strip (46) which is configured for the detachable fastening of the clamping bracket (32) to the force generating device (20).

9. Introduction device according to any one of claims 1 to 8, characterised in that the introduction device (10) is configured as a shaker, wherein the force generating device (20) is configured as a vibration generator.

10. Introduction device according to claim 9, characterised in that the vibration generator has at least one rotationally driven imbalance unit or at least one piston unit with a reversing movable piston.

11. Introduction device according to any one of claims 1 to 8, characterised in that the introduction device (10) is configured as a sheet pile press, wherein the force generating device (20) comprises at least one pressure cylinder for generating the driving-in force.

12. Introduction device according to any one of claims 1 to 11, characterised in that the clamping bracket (32) is mounted on the underside of the force generating device (20) in an adjustable, in particular rotatable, manner.

13. Introduction device according to any one of claims 1 to 12, characterised in that a plurality of clamping devices (30) is arranged next to one another.

14. Introduction device according to any one of claims 1 to 13, characterised in that the force generating device (20) is displaceably mounted and guided on a mast (14) which is substantially vertical during operation and is arranged on a carrier device (12).

15. Method for introducing a foundation element, in particular a pile or a sheet pile, into the ground, characterised in that an introduction device (10) according to any one of claims 1 to 14 is used for driving the foundation element into the ground.

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