Foundation engineering machine and method for producing a trench in the ground

Abstract

A foundation engineering machine and method for producing a trench in the ground include a substantially vertical mast, a diaphragm wall apparatus displaceably supported in a longitudinal direction of the mast for producing the trench, and a bar-shaped holder, at the lower end of which the diaphragm wall apparatus is mounted and with which the diaphragm wall apparatus is linearly displaceable along the mast. An upper first clamping sledge with a first clamp for releasably clamping the bar-shaped holder and a lower second clamping sledge with a second clamp for releasably clamping the bar-shaped holder are movably supported on the mast. The first clamping sledge and the second clamping sledge are movable relative to each other, and the lower second clamping sledge has a connector for mounting an additional lifting device disposed on the ground, with which a force can be applied in the longitudinal direction onto the second sledge.

Claims

1. A foundation engineering machine comprising: a substantially vertical mast, a diaphragm wall apparatus, which is displaceably supported in a longitudinal direction of the mast for producing a trench in the ground, and a bar-shaped holding means, at the lower end of which the diaphragm wall apparatus is mounted and with which the diaphragm wall apparatus is linearly displaceable along the mast, wherein on the mast an upper first clamping sledge with a first clamping means for releasably clamping the bar-shaped holding means and a lower second clamping sledge with a second clamping means for releasably clamping the bar-shaped holding means are movably supported and the first clamping sledge and the second clamping sledge are movable relative to each other, the foundation engineering machine further comprises an additional lifting device which is arranged on the ground and with which a force can be applied in the longitudinal direction onto the second clamping sledge, and the lower second clamping sledge is provided with a connecting means for mounting the additional lifting device.

2. The foundation Foundation engineering machine according to claim 1, wherein the first clamping means and the second clamping means can be actuated independently of each other by a control means for alternately clamping the bar-shaped holding means.

3. The foundation engineering machine according to claim 1, wherein the diaphragm wall apparatus is designed as a diaphragm wall cutter or as a diaphragm wall grab.

4. The foundation engineering machine according to claim 1, wherein the holding means is of greater length than the mast or formed with several bar elements.

5. The foundation engineering machine according to claim 1, wherein the bar-shaped holding means is of tubular design.

6. The foundation engineering machine according to claim 1, wherein at least the upper first clamping sledge is movably driven along the mast.

7. The foundation engineering machine according to claim 1, wherein the connecting means has at least one connecting lug directed transversely to the longitudinal direction, wherein for a releasable connection between a lifting cylinder of the lifting device and the second clamping sledge a locking bolt can be inserted through a fixing eyelet of the lifting cylinder and the at least one connecting lug.

8. A lifting device for a foundation engineering machine according to claim 1, wherein the lifting device has a lower positioning frame for positioning on the ground and at least one lifting cylinder which is fixed on the positioning frame and is provided with a connecting element for connection to a clamping sledge.

9. The lifting device according to claim 8, comprising two or more lifting cylinders which are hydraulic cylinders.

10. The lifting Lifting device according to claim 8, wherein the positioning frame is of ring-shaped or partially ring-shaped design with a central passage for a bar-shaped holding means.

11. A method for producing a trench in the ground using the foundation engineering machine according to claim 1, the method comprising providing the connecting means of the second clamping sledge with at least one connecting lug directed transversely to the longitudinal direction, wherein for a releasable connection between a lifting cylinder of the lifting device and the second clamping sledge a locking bolt can be inserted through a fixing eyelet of the lifting cylinder and the at least one connecting lug, wherein by means of the bar-shaped holding means the diaphragm wall apparatus is sunk into the ground while ground material is being removed, wherein the trench is produced, by way of at least one of the clamping sledges the bar-shaped holding means is moved along the mast, the lower second clamping sledge is releasably connected to the additional lifting device, in which is positioned on the ground, and by means of the second clamping means the second clamping sledge is clamped tight on the holding means and by way of the additional lifting device a lifting force is applied to the holding means and the diaphragm wall apparatus.

12. The method according to claim 11, wherein during sinking at least one further bar element is installed on the bar-shaped holding means for extension.

13. The method according to claim 11, wherein the trench is filled with a hardenable mass to form a diaphragm wall segment in the ground.

14. The method according to claim 13, wherein the hardenable mass is formed in-situ in the trench during the cutting.

15. The method according to claim 11, wherein the lifting force is applied by the lifting device during the extraction of the diaphragm wall apparatus from the ground.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The invention is described further hereinafter by way of a preferred exemplary embodiment illustrated schematically in the drawings, wherein show:

(2) FIG. 1 a side view of a foundation engineering machine according to the invention;

(3) FIG. 2 a perspective view of the foundation engineering machine according to the invention of FIG. 1;

(4) FIG. 3 an enlarged view of detail A of FIG. 2;

(5) FIG. 4 an enlarged view of detail B of FIG. 2; and

(6) FIG. 5 a side view of detail B according to FIGS. 2 and 4.

DETAILED DESCRIPTION

(7) According to FIGS. 1 and 2 a foundation engineering machine 10 pursuant to the invention comprises a carrier implement 12 with a crawler-track running gear 14, on which an upper carriage 16 is supported in a rotatable manner. By way of an adjustment mechanism 18 with setting cylinders a mast 20 which in operation is substantially vertical is pivotably linked to the upper carriage 16 of the carrier implement 12.

(8) Along a linear mast guide 22 on the front side of the mast 20 an upper first clamping sledge 30 and a lower second clamping sledge 40 are displaceably supported in a longitudinal direction of the mast 20. By way of the first clamping sledge 30 and the second clamping sledge 40 a bar-shaped holding means 60 is held and guided parallel to the mast 20. The structure and function of the first clamping sledge 30 and the second clamping sledge 40 will be explained in greater detail hereinafter in conjunction with FIGS. 3 and 4.

(9) At the lower end of the mast 20 an additional lifting device 50 with lifting cylinders 54 is arranged which will be explained in greater detail hereinafter in conjunction with FIGS. 4 and 5.

(10) At a lower end of the bar-shaped holding means 60 a diaphragm wall apparatus 70 designed as a diaphragm wall cutter is mounted. By way of the holding means 60 the diaphragm wall apparatus 70 can be sunk substantially vertically into a ground while a trench is being formed. By way of lines 62 that are connected on the one hand via the mast 20 to the carrier implement 12 and on the other hand to an attachment section 66 at the upper end of the bar-shaped holding means 60 energy and data connections are established between the carrier implement 12 and the diaphragm wall apparatus 70. Here, the lines 62 run from the attachment section 66 at the upper end of the holding means 60 via an inner hollow space of the tubular holding means 60 to the diaphragm wall apparatus 70. The lines 62 are arranged along the mast 20 and the holding means 60 in the manner of a cable track.

(11) In the enlarged illustration of FIG. 3 the upper end region of the mast 20 and the bar-shaped holding means 60 is depicted in greater detail. At the upper end of the bar-shaped holding means 60 a connecting section 64 is arranged which can serve to lift the holding means 60 by means of a crane and which is in addition designed for the attachment of further bar elements for the axial extension of the holding means 60.

(12) At the upper end of the mast 20 a mast head 24 with an additional hoisting means 26 is provided. Along the mast guide 22 the upper first clamping sledge 30 is displaceably or movably driven in the vertical direction or longitudinal direction of the mast 20. For driving purposes, a deflection roller 28 is provided in the region of the mast head 24 for a non-depicted drive rope which is connected on the one hand to a winch 29 on the mast 20, shown in FIG. 1, and on the other hand, after deflection by the deflection roller 28, to a first sledge base body 32 of the first clamping sledge 30.

(13) By way of this first drive rope a pull force can be applied to the first clamping sledge 30 in order to pull the clamping sledge 30 upwards in the longitudinal direction. In a generally known manner provision is also made at the lower end of the mast 20 for a non-depicted further deflection roller of the drive means, in which case a further drive rope is guided from the winch 29 via the lower end of the mast 20 to the first clamping sledge 30 so that a pull force can thus be applied in the downward direction onto the first clamping sledge 30.

(14) Arranged on the first clamping sledge 30 on the first sledge base body 32 thereof are two lateral, opposite-lying clamping cylinders 36 for forming a first clamping means 34. Through the first clamping means 34 a force-locked connection to the bar-shaped holding means 60 can be established so that by way of the first clamping sledge 30 the holding means 60, by being guided along the mast 20, can be moved upwards or downwards in the longitudinal direction. Alternatively or additionally, it is in this case possible to establish a form-locked connection, for example in that locking elements actuated by the clamping cylinders 36 engage in corresponding receiving parts on the holding means 60. For this, the holding means 60 can have several receiving parts at different positions.

(15) In FIGS. 4 and 5 the region of the lower end of the mast 20 with the second clamping sledge 40 and the lifting device 50 is illustrated in greater detail. The second clamping sledge 40 is designed similar to the first clamping sledge 30 and has a second sledge base body 42 which is displaceable along the linear mast guide 22 on the mast 20. While the first clamping sledge 30 is actively driven in the illustrated exemplary embodiment, the second clamping sledge 40 is not movably driven by a drive means provided in a fixed manner on the carrier implement 12 or the mast 20. Hence, the second clamping sledge 40 basically constitutes a passively displaceable element that can be secured on the mast 20 if necessary. On the second sledge base body 42 two lateral clamping cylinders 46 are also arranged opposite each other to form a second clamping means 44 for the force-locked clamping of the bar-shaped holding means 60. In this case, too, a form-locked clamping connection is alternatively or additionally possible.

(16) In normal operation of the foundation engineering machine 10 without installation of the additional lifting device 50 the passive second clamping sledge 40 can serve as a so-called slip-through protection during an extraction of the diaphragm wall apparatus 70 by means of the holding means 60. When extracting the diaphragm wall apparatus 70 in such a normal operation the first clamping sledge 30 is moved downwards along the mast 20 in order to be connected in a force-locked manner to the bar-shaped holding means 60 in a lower position. During such a downward movement of the first clamping sledge 30 the bar-shaped holding means 60 can be clamped and held by the lower second clamping sledge 40.

(17) After a renewed clamping of the holding means 60 by the first clamping sledge 30 the force-locked connection between the holding means 60 and the lower second clamping sledge 40 can be released. In this state the first clamping sledge 30 with the holding means 60 clamped tight thereon can now be moved upwards to extract the diaphragm wall apparatus 70 from a trench 7 in the ground 5.

(18) Subsequently, the second clamping means 44 of the second clamping sledge 40 can be activated again to enable a release of the first clamping sledge 30 and a renewed downward movement of the first clamping sledge 30 for the further extraction of the diaphragm wall apparatus 70.

(19) If the pull force of the first clamping sledge 30 is no longer sufficient during this process, e.g. because the diaphragm wall apparatus 70 is jammed or stuck in the trench 7 in the ground 5 or the total weight consisting of diaphragm wall apparatus 70 and holding means 60 has increased considerably due to additionally installed bar elements, according to the invention an additional lifting device 50 can be mounted at the lower end of the mast 20 and the lower second clamping sledge 40.

(20) The lifting device 50 has a C- or U-shaped positioning frame 52 with a central passage 53 for the bar-shaped holding means 60. Therefore, the positioning frame 52 is positioned on the ground 5. Here, the positioning frame 52 has a length that enables it to bridge the width of the formed trench 7 and rest on the ground 5 on both sides of the formed trench 7, as illustrated graphically in FIG. 5. By way of contact elements 55 an open side of the positioning frame 52 can be placed laterally against the lower end of the mast 20 without any imperative necessity for the positioning frame 52 to be firmly connected to the mast 20.

(21) At the lower end of the mast 20 a supporting foot 21 for supporting the mast 20 on the ground 5 can be provided in a generally known manner.

(22) In a lower region of the second clamping sledge 40 a connecting means 48 is designed which is formed in the illustrated exemplary embodiment by horizontally directed connecting lugs 59. By way of transversely directed locking bolts 58 two lifting cylinders 54 having a fixing eyelet 56 each can be fixed on the respective connecting lugs 49 of the connecting means 48. A lower end of the lifting cylinders 54 is in each case linked to the positioning frame 52 of the lifting device 50.

(23) To apply an additional lifting force in the upward direction the lifting cylinders 54 can subsequently be extended when the second clamping sledge 40 is connected in a force-locked manner by way of the second clamping means 44 to the bar-shaped holding means 60. In this way, the second clamping sledge 40 which is displaceably supported on the mast 20 can be pressed upwards together with the holding means 60. By preference, the lifting cylinders 54 are aligned centrally to the trench 7 in the ground 5 and parallelly to the longitudinal direction of the mast 20 so that virtually no transverse force is exerted onto the carrier implement 12. Hence, through the additional lifting device 50 high lifting forces can be applied when necessary, without the tilt stability of the foundation engineering machine 10 being appreciably affected. The lifting process can be repeated stepwise.

(24) Accordingly, when necessary an additional feed force can also be applied by the lifting device 50 in the downward direction onto the bar-shaped holding means 60 and the diaphragm wall apparatus 70. In this case, the lifting device is anchored in the ground e.g. by means of ground anchors (not shown) to prevent the positioning frame from lifting off during the application of the additional feed force. If there is no need for an additional lifting force, the lifting device 50 can be dismantled again by releasing the connecting means 48 and removed from the foundation engineering machine 10.

(25) In the illustrated exemplary embodiment the diaphragm wall apparatus 70 is designed as a diaphragm wall cutter with an implement frame 72 and cutting wheels 74 arranged thereon. The illustrated diaphragm wall cutter is designed for a so-called CSM®-method, with the circumferential dimensions of the implement frame 72 being smaller than a cutting cross-section. Thus, the implement frame 72 is spaced from the walls of the trench 7 in the ground 5. Through this, suspension can be introduced via a supply line 23 from the foundation engineering machine 10 via a hose line, not depicted in greater detail, into the trench 7 and mixed by the cutting wheels 74 directly in-situ in the trench 7 with removed ground material. The mixture thus produced can constitute a so-called ground mortar which hardens in the trench 7 into a diaphragm wall segment.