EP3152366B1 - Vibroflotator - Google Patents

Description

The invention relates to a deep vibrator tube assembly for a deep vibrator for the production of vibrating columns, a device with such a deep vibrator tube assembly and a deep shaking method for the production of vibrating columns. Genus-like deep vibrator, as besispielsweise from the DE 197 07 687 A1 known in principle, are generally used in three methods for ground improvement, which differ from each other in terms of operation and load transfer. With the Rütteldruckverfahren coarse-grained soils are compressed in itself. In the vibratory tamping method load-bearing columns made of gravel or crushed stone are placed in mixed and fine grained, non-compactible soils. With the third method pile-like foundation elements are produced over which relatively high loads can be removed, if a permanent load-bearing composite with Stopfsäulen is not guaranteed. The different Tiefenrüttelverfahren are also described in the brochure "Die Tiefenrüttelverfahren" (Prospectus 10-02D) of the applicant.
In Rüttelstopfverdichtung Schleusenrütter are usually used in the coarse-grained addition material emerges with compressed air support at the Rüttlerspitze. Due to the special equipment required, caddy-guided cradles have been developed to provide additional pressure during countersinking and compaction. When Rüttelstopfverfahren is working in alternating steps. The gravel or gravel emerging from the vibrator stroke is compressed when it is pressed and displaced laterally into the soil. in this way, tamping columns are created which, in combination with the ground, remove loads.

From the DE 101 45 288 A1 For example, there is known a method for producing stuffing columns for improving the soil properties of soil by means of a sluice vibrator. For this purpose, the lock vibrator is shaken to a lowest point. Subsequently, the sluice shaker is withdrawn from a lower opening while flowing out of column material such as ballast. To compress the column material, stuffing movements are performed at intervals. The lock vibrator has a laterally passing lock tube with a lower opening. At the upper end of the lock vibrator is connected via a flexible coupling with a drill pipe, via which the feed material flows.

From the DE 101 15 107 A1 is a deep vibrator known with a Rüttlerrohr and rotatably mounted in the Rüttlerrohr eccentric. The vibrator tube is coupled via a coupling to an extension tube. The motor for driving the eccentric is arranged above the extension tube.

From the DE 197 07 687 C1 a device for making stuffing columns in the ground is known. The device comprises a device carrier with a leader, a slide which can be moved on the leader and a deep vibrator with drive head and material delivery tube. At the upper end of the carriage a cantilever with a winch for a container is provided, with which a feed lock material can be supplied. In the upper end position of the cantilever overhangs the leader upwards. For a given length of Mäklers can thus produce relatively long columns.

With the known Rüttlervorrichtungen or Rüttelverfahren only sink depths can be achieved, which are less than the machine height, respectively, the above ground clearance.

The present invention is therefore based on the object to propose a deep vibrator tube arrangement for a deep vibrator for the production of vibrating columns, which allows sink depths that are greater than the machine height or the above-ground available space. The object further consists in a corresponding device with such a deep vibrator tube assembly and to propose a suitable deep shaking method for the production of vibrating columns.

A solution is to provide a deep vibrator tube assembly for connecting a deep vibrator to a device comprising: a first tube body connectable to the device; a second tubular body connectable to the depth vibrator; wherein the first tubular body and the second tubular body are telescopic relative to each other. An advantage of the telescopic deep vibrator tube assembly is that it can be used to make columns whose depth is greater than the space available above the floor or the height of the depth shaker. It is also possible to use smaller depth shakers with the same countersink depth. A further advantage of the variable-length tube arrangement is that the transport length of the depth shaker devices can be reduced.

By deep vibrator tubing arrangement, it is meant that the tubing assembly is suitable and designed for use in a depth shaker device. In the installed state, the tube arrangement connects a deep vibrator arranged at the lower end to a mast of the device. In this respect, the tube assembly may also be referred to as a telescoping extension tube. The first tubular body is connectable to the device, whereby the interposition of further elements such as a slide or other pipe or adapter body should be included. In this respect, the connection of the first tubular body with the device can also be referred to as at least indirect. The second tubular body is at least indirectly connectable to the deep vibrator, with which the interposition of further elements such as a clutch or an adapter body should be included. The first tubular body and the second tubular body have for connection to a respective connection component corresponding connection means, which may be designed, for example in the form of flange or screw or pockets for receiving clamping bolts.

Due to the telescopability, the total length of the tube assembly can be changed. For this purpose, a plurality of tubular bodies are provided which are longitudinally displaceable with each other. In this case, one of the tubular body is designed as an inner tube with a smaller diameter, while the other tubular body as an outer tube with a larger Diameter is designed, in which the inner tube is retractable. Preferably, the inner tube is assigned to the mast (first tubular body) and the outer tube assigned to the deep vibrator (second tubular body). In this way, the larger diameter tubular body is provided at the lower end so that reduced frictional forces on the subsequent bottom result from the subsequent smaller diameter tubular body when placed in the ground. In principle, however, a reverse design would be conceivable, that is outer tube above and inner tube below.

In the retracted position, the tube assembly has a first length, in the extended position, the tube assembly has a larger second length. It is understood that in principle more than two tubular bodies can be used, which are telescopic relative to each other.

According to a preferred embodiment, the deep shaker tube assembly comprises locking means with which the first tubular body and the second tubular body are detachably connectable to each other at least in a retracted position and in an extended position. It is understood that an embodiment is also possible in which the two tubular bodies can be fixed relative to one another in one or more intermediate positions between the retracted and extended positions. This can optionally be achieved with great flexibility in terms of the depth of the columns to be produced. It is provided in particular that the locking means can be converted into a locking position in which the tubular bodies are firmly connected to each other, and in a release position in which the tubular bodies are axially displaceable relative to each other. The actuation of the locking means can be done manually or automatically by means of a controller.

Preferably, the locking means comprise a plurality of locking units, which are arranged distributed over the circumference. Particularly favorable is the use of three circumferentially distributed locking units. Hereby, a particularly secure connection and good support of optionally acting between the two tubular bodies tilting moments is achieved. However, in principle one, two, four or more than four locking units can be used. The Locking units can be arranged according to a first possibility in a plane. According to a second possibility, the locking units can also be arranged in two or more axially spaced-apart planes, whereby a particularly good support of tilting moments is achieved. The latter option is particularly suitable for automated actuation of the locking units, since several or all locking units can be operated simultaneously.

According to a preferred embodiment, the locking units each have a locking element and a receptacle into which the locking element can engage. The receptacle, which may be designed, for example, as a recess or cup-shaped body, is also referred to as a receiving element. It is envisaged that the locking element is assigned to one of the two tubular body and the receptacle to the other of the two tubular body, wherein the locking element can be brought by radial displacement with the associated receptacle in engagement. A locking element and an associated receptacle are preferably designed opposite to each other, such that the locking element engages in the clamped state positive and play-free in the associated receptacle. In particular, the locking element may be designed as a rotationally symmetrical body with a conical end portion and the receptacle as a cup-shaped body with a conical inner wall.

After a first possibility, the locking elements are assigned to the outer tube or supported on this, while the recordings are assigned to the inner tube. This embodiment is particularly suitable for manual actuation of the locking units, which can be performed from the outside. In a second possibility, the locking elements are assigned to the inner tube or supported on it, while the receptacles are associated with the outer tube. This embodiment is particularly suitable for automated operation, which is feasible via control lines from the inside.

For the first possibility may be provided in particular that the locking elements supported on the associated pipe body by means of clamping bolts or are tense. By screwing in the clamping bolt, the locking element is moved radially inward, and engages in the fully tensioned state without play in the respective receptacle of the other tubular body. In this way, the first tubular body and the second tubular body are firmly connected to each other.

For the second possibility may be provided in particular that the locking elements are supported on the associated tubular body by means of a piston and radially movable by hydraulic pressurization of the piston, wherein the locking elements engage in a clamped state in the respective receptacles of the other tubular body, so that the first tubular body and the second tubular body are fixedly connected to each other. By the hydraulic actuation several or all locking elements can be actuated simultaneously. The pistons each sit radially displaceably in a cylinder of one of the tubular bodies and are firmly connected to the locking element, for example via a screw connection. By hydraulic pressurization of the piston and the locking element connected thereto is acted upon radially in the direction of the other tube body, and engages in the receptacle formed there.

According to a preferred embodiment, at least one annular seal is provided between the first tubular body and the second tubular body, which seals the annular gap between the first tubular body and the second tubular body. In particular, a ring seal may be provided at the upper end of the second tubular body and a ring seal at the lower end of the first tubular body. The at least one ring seal prevents undesired penetration of dirt into the annular gap and allows a pressure build-up within the tube assembly to supply the deep vibrator, for example, with compressed air or water.

The telescopic extension tube can be structurally adapted to the respective method or the respective device. Thus, the tube assembly may be configured according to a first embodiment for carrying out a Rüttelstopfverfahrens. In this case, the two tubular bodies each have a material tube through which material can flow to compress the soil, as well a cable tube which is arranged laterally adjacent to the material pipe and through which an electrical cable for the lock vibrator is feasible. Preferably, in this embodiment, at least one reinforcement is provided on an inner wall of the material pipe in the region of the locking units, which protects the locking unit from material flowing through. The reinforcement may be designed as a ring which is fixed in the tubular body above the locking units, for example by means of welding. According to a second embodiment, the tube arrangement can be designed for carrying out a vibration pressure method in which a material supply is not provided. In this case, the tubular body each have an inner channel through which an electrical cable for the pressure shaker is feasible. If necessary, a water rinse to the deep vibrator can be conveyed through the inner channel. According to a further embodiment, the telescopic extension tube can also be designed for carrying out a method for producing pile-like foundation elements. In this case, the tube arrangement, which is at least similar or identical as designed for the Rüttelstopfverfahren includes a material tube through which a curable suspension is supplied as an addition material. The pile-like foundation elements thus produced are also referred to as Betonstopfsäulen or Fertigmörtelstopfsäulen.

The solution of the above-mentioned object further consists in a device for deep shaking comprising: a device with a mast; a deep vibrator tube assembly which is height adjustable on the mast and which has one or more of the above-mentioned configurations; a deep vibrator attached to a lower end of the deep vibrator tube assembly; and a cable tensioning device, which is designed such that the electrical cable for the deep vibrator during telescoping of the first tubular body is tracked relative to the second tubular body tensioned.

The device according to the invention offers the same advantages which have already been mentioned in connection with the deep vibrator tube arrangement. In particular, can be made with the same size of Tiefenrüttelvorrichtung columns with greater depth, or, at the same depth depth can be a smaller Tiefenrüttelvorrichtung be used. In addition, the device has a particularly low transport length. The apparatus may be configured to carry out the vibrating pressure method, the vibrating-pot method and / or to produce pile-like constituent elements.

According to a preferred embodiment, the cable tensioning device comprises a plurality of deflection rollers, over which the electrical cable is guided, and a weight which acts on at least one of the deflection rollers in order to tension the cable. The cable tensioning device ensures that the electrical cable for the deep vibrator remains intact when telescoping the tube assembly.

The device may comprise a carriage which is held vertically adjustable on the mast, wherein it is provided in particular that the deep vibrator tube assembly and the cable tensioning device are secured to the carriage and are moved together with this. Alternatively, the deep vibrator with pipe arrangement can also be used hanging on a crane or excavator.

The solution of the above-mentioned object further consists in a deep shaking method for producing pillars in the ground with a device which may have one or more of the mentioned embodiments, comprising the steps of: driving the deep vibrator into the ground with the tube assembly retracted to a first depth; Releasing the locking means effective between the first tubular body and the second tubular body; Extending the tube assembly from the retracted to an extended position, wherein the electrical cable is tracked by means of the cable tensioning device; Closing the locking means so that the first tubular body and the second tubular body are axially fixed together in the extended position; Retracting the deep vibrator into the ground with the pipe assembly extended to a second depth greater than the first depth; Building a first column section in the ground by pulling the deep vibrator with the tube assembly extended; Releasing the locking means acting between the first tubular body and the second tubular body in the extended position; Retracting the tube assembly from the extended to a retracted position, wherein the electrical cable is tracked by means of the cable tensioning device; Closing the locking means, so that the first tubular body and the second tubular body are axially fixed to each other in the retracted position; Construction of a second column section above the first column section by pulling the deep vibrator with retracted tube assembly.

The method according to the invention achieves the same advantages as with the device or the tube arrangement. It is understood that all process features apply to the above-mentioned device or pipe arrangement and, conversely, all device features for the process.

Figur 1

eine erfindungsgemäße Tiefenrüttler-Rohranordnung in einer ersten Ausführungsform
A) in einer ersten Seitenansicht;
B) im Längsschnitt gemäß Schnittlinie 1B-1B aus Figur 1 A;
C) in einer zweiten Seitenansicht;
D) in Draufsicht;
E) in Ansicht von unten;
F) die Verriegelungsanordnung gemäß Figur 1B im Detail;

Figur 2

eine erfindungsgemäße Tiefenrüttelvorrichtung mit einer erfindungsgemäßen Tiefenrüttler-Rohranordnung
A) in Seitenansicht;
B) in perspektivischer Ansicht von schräg vorne mit ausgefahrener Tiefenrüttler-Rohranordnung;
C) in perspektivischer Ansicht von schräg vorne mit eingefahrener Tiefenrüttler-Rohranordnung;
D) die Verriegelungsanordnung gemäß Figur 2C im Detail;

Figur 3

die Kabelspannvorrichtung der erfindungsgemäßen Tiefenrüttelvorrichtung gemäß Figur 2 im Detail
A) in einer ersten Seitenansicht;
B) in einer zweiten Seitenansicht;
C) die Klemmvorrichtung gemäß Schnittlinie 3D-3D aus Figur 3A als Detail;
D) eine Umlenkrollenlagerung gemäß Schnittlinie 3C-3C aus Figur 3A als Detail;

Figur 4

ein erfindungsgemäßes Tiefenrüttelverfahren zur Herstellung einer Rüttelstopfsäule mittels einer Vorrichtung gemäß den Figuren 2 und 3
A) im Ausgangszustand;
B) mit bei eingefahrener Rohranordnung in den Boden bis zu einer ersten Tiefe eingebrachtem Tiefenrüttler;
C) in ausgefahrenem Zustand der Rohranordnung;
D) mit bei ausgefahrener Rohranordnung in den Boden bis zu einer zweiten Tiefe eingebrachtem Tiefenrüttler;
E) nach Erstellen eines ersten Säulenabschnitts durch Ziehen des Tiefenrüttlers bei ausgefahrener Rohranordnung;
F) in erneut eingefahrenem Zustand der Rohranordnung;
G) nach Erstellen einer vollständigen Säule durch Ziehen des Tiefenrüttlers mit eingefahrener Rohranordnung (im Endzustand);

Figur 5

eine erfindungsgemäße Tiefenrüttler-Rohranordnung in einer zweiten Ausführungsform;
A) im Längsschnitt;
B) die Betätigungsvorrichtung der Rohranordnung nach Figur 5A in perspektivischer Ansicht, teilweise geschnitten, in eingefahrener Stellung;
C) die Betätigungsvorrichtung der Rohranordnung nach Figur 5A in perspektivischer Ansicht, teilweise geschnitten, in ausgefahrener Stellung;

Figur 6

eine erfindungsgemäße Tiefenrüttelvorrichtung mit einer Tiefenrüttler-Rohranordnung gemäß Figur 5
A) in Seitenansicht;
B) in perspektivischer Ansicht von schräg vorne mit in den Boden bei eingefahrener Rohranordnung eingebrachtem Tiefenrüttler;
C) in perspektivischer Ansicht von schräg vorne mit in den Boden eingebrachtem Tiefenrüttler bei ausgefahrener Rohranordnung;

Figur 7

ein erfindungsgemäßes Tiefenrüttelverfahren zur Herstellung einer Rüttelstopfsäule mittels einer Vorrichtung gemäß Figur 6
A) im Ausgangszustand;
B) mit bei eingefahrener Rohranordnung in den Boden bis zu einer ersten Tiefe eingebrachtem Tiefenrüttler;
C) in ausgefahrenem Zustand der Rohranordnung;
D) mit bei ausgefahrener Rohranordnung in den Boden bis zu einer zweiten Tiefe eingebrachtem Tiefenrüttler;
E) nach Erstellen eines ersten Säulenabschnitts durch Ziehen des Tiefenrüttlers bei ausgefahrener Rohranordnung;
F) in erneut eingefahrenem Zustand der Rohranordnung;
G) nach Erstellen einer vollständigen Säule durch Ziehen des Tiefenrüttlers mit eingefahrener Rohranordnung (im Endzustand).

Preferred embodiments will be explained below with reference to the drawing figures. Hereby shows:

FIG. 1

a deep vibrator tube assembly according to the invention in a first embodiment
A) in a first side view;
B) in longitudinal section according to section line 1B-1B FIG. 1 A;
C) in a second side view;
D) in plan view;
E) in bottom view;
F) the locking arrangement according to FIG. 1B in detail;

FIG. 2

a Tiefenrüttelvorrichtung invention with a Tiefenrüttler tube assembly according to the invention
A) in side view;
B) in a perspective view obliquely from the front with extended Tiefenrüttler tube assembly;
C) in a perspective view obliquely from the front with retracted Tiefenrüttler tube assembly;
D) the locking arrangement according to Figure 2C in detail;

FIG. 3

the cable tensioning device according to the Tiefenrüttelvorrichtung invention FIG. 2 in detail
A) in a first side view;
B) in a second side view;
C) the clamping device according to section line 3D-3D FIG. 3A as a detail;
D) a deflection roller bearing according to section line 3C-3C FIG. 3A as a detail;

FIG. 4

an inventive Tiefenrüttelverfahren for producing a Rüttelstopfsäule by means of a device according to the Figures 2 and 3
A) in the initial state;
B) with deep vibrator inserted into the ground with the pipe assembly retracted to a first depth;
C) in the extended state of the pipe assembly;
D) with deep vibrator inserted into the ground with the pipe arrangement extended to a second depth;
E) after creating a first column section by pulling the deep vibrator with the tube assembly extended;
F) in re-retracted state of the tube assembly;
G) after creating a complete column by pulling the deep vibrator with retracted tube arrangement (in the final state);

FIG. 5

a deep vibrator tube assembly according to the invention in a second embodiment;
A) in longitudinal section;
B) the actuator of the tube assembly according to FIG. 5A in a perspective view, partially cut, in the retracted position;
C) the actuator of the tube assembly according to FIG. 5A in perspective view, partially cut, in the extended position;

FIG. 6

a Tiefenrüttelvorrichtung invention with a deep vibrator tube assembly according to FIG. 5
A) in side view;
B) in a perspective view obliquely from the front, with a deep vibrator inserted into the ground when the tube arrangement has been retracted;
C) in a perspective view obliquely from the front with a deep vibrator inserted into the floor with the pipe arrangement extended;

FIG. 7

an inventive Tiefenrüttelverfahren for producing a Rüttelstopfsäule by means of a device according to FIG. 6
A) in the initial state;
B) with deep vibrator inserted into the ground with the pipe assembly retracted to a first depth;
C) in the extended state of the pipe assembly;
D) with deep vibrator inserted into the ground with the pipe arrangement extended to a second depth;
E) after creating a first column section by pulling the deep vibrator with the tube assembly extended;
F) in re-retracted state of the tube assembly;
G) after creating a complete column by pulling the deep vibrator with retracted tube assembly (in final state).

The FIGS. 1A to 1F will be described together below. It is shown a deep vibrator tube assembly 2 according to the invention for a vibrating or Fertigstopfvorrichtung.

With a jig-tamping device, columns can be created for ground improvement or drainage columns in the ground. With the vibratory tamping method load-bearing columns made of gravel or gravel are installed, especially in mixed and fine grained, non-compactible soils. For this purpose, a deep vibrator (not shown here) to be connected to the pipe arrangement 2 is introduced into the ground. The tube assembly 2 or the associated deep vibrator is guided by a suitable device, such as an excavator, a crane or a caterpillar. The deep vibrator has an electronically driven imbalance, which puts the vibrator in horizontal vibration. The deep vibrator can in Shaped a form of Schleusenrüttlers be exits at the Rüttlerspitze at the additional material which flows through the pipe assembly.

With a Fertigstopfvorrichtung be created by introducing a curable suspension, such as concrete, pile-like foundation elements in the ground, can be removed on the relatively high loads. The foundation elements are made in the same way as in the jar-tamping process. The methods mentioned can also be combined with each other.

The deep vibrator tube assembly 2 comprises a first tubular body 3, which is to be connected at least indirectly to the device (not shown here), and a second tubular body 4, which is to be connected at least indirectly with the deep vibrator (not shown here). For connection to the apparatus, the deep vibrator tube assembly 2 at the first end 5, which in the installed state corresponds to the upper end, first connecting means 6, which are designed in the form of screw, without being limited thereto. At the lower end 7 of the tube assembly 2 second connecting means 68 are provided, with which the tube assembly with the deep vibrator or an intermediate elastic coupling (not shown) can be connected.

The tube assembly is designed so that the first tube body 3 and the second tube body 4 are telescopically relative to each other and in at least two positions for the transmission of forces firmly connected to each other. The FIGS. 1A to 1C show the tube assembly 2 in the retracted position, in which the tube assembly 2 has a short first length L1. As already mentioned above, the present pipe arrangement is designed for use in connection with a lock vibrator. For this purpose, the two tubular body 3, 4 each have a material pipe 8, 9, can flow through the material from the device to the lock vibrator, and a cable tube 10, 11 which is laterally adjacent to the respective material pipe 8, 9 and through which an electrical cable to Control and power supply of Schleusenrüttlers can be passed.

It can be seen that the device facing the first pipe body 3 in the the Deep vibrator facing the second tube body 4 is retracted. In this respect, the first tubular body 3 may also be referred to as inner tube and the second tubular body 4 as outer tube. In order to enable the telescoping, the material tube 8 and the cable tube 10 of the first tube body 3 each have smaller outer diameter than the corresponding inner diameter of the material tube 9 and the cable tube 11 of the second tube body 4th

Between the first tubular body 3 and the second tubular body 4 releasable locking means 12 are provided. The locking means 12 can be transferred to a release position in which the two tubular body 3, 4 are longitudinally displaceable relative to each other, and in a closing or locking position in which the two tubular body 3, 4 are firmly clamped together. Specifically, the locking means 12 are designed so that the first tubular body 3 and the second tubular body 4 are firmly connected to each other at least in a retracted first position with a short length L1 and in an extended second position with a greater length L2.

The locking means 12 comprise a plurality of locking units 13 which are arranged distributed over the circumference. In the present embodiment, three circumferentially distributed locking units 13 are provided in a locking plane, wherein also a different number and other arrangement in several levels is conceivable. Each locking unit 13 has a locking element 14 which is firmly clamped to the second tubular body 4, and a counter-identical receiving element 15 which is fixedly connected to the first tubular body 3. The FIGS. 1B 1F and Fig. 1F show the locking means 12 in the closed position, in the inserted state of the pipe assembly 2. By the same is meant that the locking elements 14 in the clamped state positively and play-free engage in the associated receptacle 15, so that the two tubular body 3, 4 in this Connection area are firmly clamped together.

The locking elements 14 are designed bolt-shaped and each have a flange portion 16 which is radially supported on a support surface of the second tubular body 4, and a conical end portion 17 which passes through radial passage openings 24 in the tube wall of the outer tube 4 into the associated receptacle 15 of the inner tube 3 can engage. The receiving elements 15 are cup-shaped and have a flange portion 18 which is radially supported relative to the inner tube 3 and an inner conical cup portion 19, in which the cone portion 17 of the locking element 14 can engage. The receiving elements 15 are fixedly connected to the inner tube 3. For this purpose, the inner tube 3 has a welded-ring section 20 with circumferentially distributed openings 21, in each of which an associated receiving element 15 is inserted and fixed. The welded-in ring portion 20 has a greater wall thickness than the axially adjoining pipe sections.

For releasing or clamping the locking elements 14, a plurality of clamping bolts 22 are provided, which are screwed into an internal thread in the outer tube 4 and can be supported with a bolt head on the locking element 14. With release bolts 23, which are each screwed into an internal thread of the locking element 14 and which are supported with their end on a support surface of the outer tube 4, the locking elements 14 can be released again if necessary and removed from the receptacles 15. The number of clamping bolts 22 is greater than the number of release bolts 23.

It is especially in FIG. 1B recognizable that the inner tube 3 has two groups of receptacles 15, 15 ', namely a first group of receptacles 15 in a (upper) first end portion of the inner tube 3 and a second group of receptacles 15' in a (lower) second end portion of Inner tube 3. In the retracted state of the tube assembly 2, the locking body 14 can be brought into engagement with the first receptacles 15. In this state, the tube assembly 2 has a short first length L1 as in FIGS FIGS. 1A to 1C shown. After releasing the locking body 14 from the receptacles 15 of the first group of the first tube body 3 can be pulled out of the second tube body 4 until the joining plane of the outer tube 4 is arranged in axial overlap with the second group of receptacles 15 '. In this position, the locking body 14 can be inserted and clamped in the receptacles 15 'of the second group, wherein a larger second length L2 of the tube assembly is defined. It can be provided stops which a relative retraction movement or Extending movement of the two tubular body 3, 4 axially limited. The stops are to be designed so that the joining plane of the outer tube 4 is in reaching the Einfahranschlags in the first joining plane of the inner tube 3 and upon reaching the Ausfahranschlags in the second joining plane of the inner tube 3. Covering the joining planes, the openings 24 for the locking bodies 14 are aligned with the respective receptacles 15, 15 '.

To protect against wear, reinforcements 25, 25 'are provided above or in the area of the first and second joining planes of the inner tube 3, which protect the receiving elements 15, 15' from material flowing through the material tube 8. The reinforcements 25, 25 'are each designed as rings connected to the inner tube, for example by means of welding, which are arranged axially above the respective annular section 20 or the associated receiving elements 15, 15' and cover these radially inwards. In this way, the receiving elements 15, 15 'are protected from the material to be introduced.

Between the material pipe 8 of the first pipe body 3 and the material pipe 9 of the second pipe body 4, a first sealing arrangement 26 is provided, which seals the annular gap formed between the material pipes 8, 9. The seal assembly 26 includes a plurality of ring seals 27 above and below the joint plane. The ring seals 27 are arranged in an inner wall of the second material tube 9 and can be adjusted by a clamping mechanism. For this purpose, the annular seals 26 are acted upon axially, so that the annular gap between the material pipes 8, 9 can be closed again when worn. The seal assembly 65 has the function that prevents unwanted ingress of dirt into the annular gap and a pressure build-up within the tube assembly 2 is made possible to supply the connected to the tube assembly 2 Tiefenrüttler example, compressed air or water. Between the cable ducts 10, 11, a sealing arrangement 28 is likewise provided, which seals the annular gap formed there. The seal arrangement 28 comprises a plurality of ring seals 29, which are arranged between an outer wall of the first cable tube 8 and a sealing body 30. The seal assemblies 25, 28 allow in addition to the sealing function a good sliding of the two tubular body 3, 4 relative to each other. Both seals 25, 28 are easily replaced and can be adjusted depending on the abrasion.

The FIGS. 2A to 2D and 3A to 3D will be described together below. It is a Tiefenrüttelvorrichtung 32 invention shown in a first embodiment with a Tiefenrüttel tube assembly 2 according to the invention according to the FIGS. 1A to 1F , The present depth vibrator 32 is configured to perform the shaking method without, however, being limited thereto. The device can equally be used for producing pile-like foundation elements.

The device 32 comprises a mobile device 33, which in the present case is designed in the form of a tracked device, without being limited thereto. On the device 33, a support frame 34 is attached, which is also referred to as Mäklermast. The Mäklermast 34 is pivotally relative to the device 33 by means of a power-operated actuator 35. On the Mäklermast 34 guide rails 36 are provided, on which a carriage 37 is movably guided. On the carriage 37, the actual depth shaker 38 is attached. The depth shaker 38 includes the tube assembly 2 and the depth shaker 39, which is connected to the tube assembly 2 via a flexible coupling 40. At the upper end of the Mäklermastes 34 a cantilever 41 is provided with a winch 42, with a container 43 along the Mäklermast 34 is movable. In a lowered position to the ground, the container 43 can be filled with material, such as gravel, which then - in an elevated Mäklermast, upper position - can flow from the container 43 into the upper end 6 of the tube assembly 2. The material flows through the tube assembly 2 in the associated deep vibrator 39, at the tip 44 it exits into the ground.

In order that the electrical cable for the deep vibrator 39 is not damaged, a cable tensioning device 45 is provided, which as a detail in the FIGS. 3A to 3D is shown. The cable tensioning device 45 is designed so that the electric cable 46 is always tensioned for the deep vibrator 39 when telescoping the first tubular body 3 relative to the second tubular body 4 and is tracked. The cable tensioning device 45 is attached to the carriage 37 and can be moved together with this on the mast 34. As in particular in FIG. 3A can be seen, the cable tensioning device 45 comprises a support arm 47, on which a plurality of first guide rollers 48 are rotatably supported by bearings 49, and a relative to the support arm 47 height adjustable adjusting arm 50 with second pulleys 51. The electrical cable 46 is at one end of the support arm 47 in a Clamping device 52 fixed, which as a detail in Figure 3D is shown, and guided over the first and second guide rollers 48, 51, from where the cable 46 opens into the upper opening of the first cable tube 10. On adjusting arm 50, a weight 53 is fixed, whose mass is designed so that it counteracts the weight of the cable 46 to keep it stretched. On the adjustment arm 50 further engages a safety cable 54, which is part of a load-securing device 55, which prevents a drop of the adjustment arm 50 when the cable 46 breaks.

Due to the telescoping of the tube assembly 2, it is possible to create columns in the ground, which have a greater depth T2 than the height H of the Mäklermastes 34. An inventive method by means of a device according to the invention according to the FIGS. 2A to 2D and 3A to 3D will be described below on the basis of FIGS. 4A to 4G explained.

FIG. 4A shows the device 32 in the starting position with located above the bottom edge 56 Tiefenrüttler 39. As already mentioned above, the deep vibrator 39 is designed as a sluice, with the coarse-grained addition material for the preparation of a soil column can be introduced into the soil. In a first step, the deep vibrator 39 is introduced into the bottom 57 up to a first depth T1. This condition is in FIG. 4B as in Figure 2C shown. The depth T1 is reached when the locking means 12 are slightly above the bottom edge 56, so that they can be actuated by an operator. Now, the locking means 12 can be solved, which is accomplished by opening the clamping screws 22 and removing the locking elements 14 from the recesses 15. Subsequently, the upper first tubular body 3 can be moved out by raising the carriage 37 from the lower second tubular body 4, wherein the second tubular body 4 and attached thereto Tiefenrüttler 39 due to their own weight in given Depth T1 remain in the bottom 57. While moving apart, the Rüttlerkabel 46 is automatically kept taut with the help of the cable tensioning device 45 and tracked. The fully extended state of the tube assembly 2 is achieved when the lower second group of receiving elements 15 'of the inner tube 3 is in a plane with the openings 24 of the outer tube 4. After reaching this position, which in FIG. 4C and also in FIG. 2B is shown, the locking means 12 are closed, so that the two tubular bodies 3, 4 are fixed against each other. This is achieved by inserting and clamping the locking elements 14, which then positively engage in the associated receptacles 15 ', so that the two tubular body 3, 4 are firmly connected. Now the deep vibrator 39 can be further shaken into the ground 57, until reaching the final depth T2. This condition is in Figure 4D shown.

Now, the construction of the column 58 is started in the bottom 57, with additional material optionally exits with compressed air support pulling the Tiefenrüttlers 39 at the Rüttlerspitze 44. The carriage 37 is moved to the upper position or to the stroke end, wherein a first column section is created from the depth T2 to the depth T1. After reaching the upper position, the locking means 12 are again freely accessible above the bottom edge 56. This state is in Figure 4E shown. Now the locking means 12 are released again, which is done by opening the clamping screws and removing the locking elements 14. Subsequently, the carriage 37 is inserted with the attached first pipe body 3 back into the second tubular body 4. During the telescoping or retracting operation, the deep vibrator cable 46 is held tensioned and tracked with the aid of the tensioning device 52, the necessary tensile force corresponding to the generated cable friction in the cable ducts 10, 11 being applied by the adjustable counterweight 53. When the retracted state of the tube assembly 2 is reached, which in FIG. 4F and the Figures 2C . 2D is shown, the locking means 12 of the tube assembly 2 can be closed again, which is done by inserting and clamping the locking body 14. Now, the upper column section is created by stepwise pulling and shaking the Tiefenrüttlers 39 in the retracted state of the tube assembly 2. The final state with completed column 58 is in FIG. 4G shown.

The FIGS. 5A to 5C , which will be described together below, show a pipe assembly 2 according to the invention in a second embodiment. The present pipe arrangement 2 largely corresponds to the pipe arrangement according to the FIGS. 1A to 1F , so that reference is made to the above description in terms of similarities. The same, respectively corresponding details are provided with the same reference numerals as in the FIGS. 1A to 1F , In the following, particular attention is paid to the differences.

A first difference is that the tube assembly 2 according to the FIGS. 5A to 5C designed for use in a Rütteldruckverfahren. In Rütteldruckverfahren densification of coarse-grained soils by Tiefenrüttler takes place at a relatively low frequency. The vibrator can be used hanging on a crane or excavator. Under the influence of the vibrations of the deep vibrator, the soil grains are brought into a denser storage, whereby a volume reduction of the soil occurs. A material addition to the soil does not occur in Rütteldruckverfahren. In this respect, the first and the second tubular body 3, 4 also each have only one channel 10, 11, through which the Rüttlerkabel 46 is passed. A material pipe is not provided.

Another peculiarity of the tube assembly 2 is the design of the locking means 12, which are designed to be controllable. For this purpose, the locking units 13 each have a hydraulically actuable piston 59 which is seated radially movable in a cylinder 60 associated with the inner tube 3. The piston-cylinder unit 59, 60 is designed double-acting, that is, by pressurizing a first cylinder chamber via a first hydraulic line 61, the associated piston 59 is acted upon radially outward, and by pressurizing a second cylinder chamber via a second hydraulic line 62 of the piston after moved radially inward. On the piston 59, a respective locking element 14 is fixed, by means of a screw, without being limited thereto.

In moved radially outward position of the piston 59 engage the associated locking elements 14 in the respective receptacles 15, 15 'of the outer tube 4 on. The receptacles 15, 15 'are presently formed in the form of circumferential annular grooves formed in the inner wall of the outer tube 4. In the radially projecting position of the piston 59, the inner tube 3 and the outer tube 4 are firmly clamped together. By moving the pistons 59 radially inward, the locking elements 14 release the receivers 15, so that the inner tube 3 can be moved relative to the outer tube 4. Compared with the above embodiment, in this case a kinematic reversal is provided insofar as that the locking elements 14 are the inner tube 3 and the receptacles 15 associated with the outer tube 4. This has advantages with respect to the production and control of the hydraulic lines, which are associated with the upper tubular body 3. The locking elements 14 are provided in a lower pipe section 63, which has a thickened wall opposite the adjoining pipe section 64, so that the piston-cylinder units 59, 60 can be accommodated here. The two pipe sections 63, 64 are welded together. At the lower pipe section 63, an annular cover member 65 is screwed sealingly, which terminates end-side sections of the hydraulic channels.

In the fully retracted position, which in the Figures 5A and 5B is shown, proposes the cover member 65 against an outer tube 4 associated with the end stop 66. The stopper 66 is formed by an end face of the end portion 7 of the tubular body 4, which is inserted into the axially adjacent pipe section 67 and welded thereto. The pipe section 67 has areas with greater wall thickness, in which the radial receptacles 15 are formed. The end portion 7 has circumferentially distributed pockets as connecting means 68 for connection to the deep vibrator 39. Between the inner tube 3 and the outer tube 4 upper and lower sealing means 26, 28 are provided.

It can be seen that the outer tube 4 has a first group of receptacles 15 at the lower end and a second group of receptacles 15 'at the upper end, wherein the two groups of receptacles 15, 15' form the retracted or extended position of the tube assembly 2. The receptacles 15 of the first group are distributed over the circumference in two planes. In this case, three receptacles 15 are provided distributed over the circumference per locking level, wherein the Receivers 15 of the two locking levels are circumferentially offset from each other. The same applies to the receptacles 15 'of the second group, which represent the extended state of the tube assembly 2.

An advantage of the present hydraulic actuation embodiment is that the locking elements 14 can be actuated simultaneously, automated, whereby the shaking process can be performed quickly and efficiently.

The FIGS. 6A to 6C and 7A to 7G will be described together below. It is a Tiefenrüttelvorrichtung 32 invention shown in a second embodiment with a Tiefenrüttel tube assembly 2 according to the invention according to the FIGS. 5A to 5C , The present depth vibrator 32 is configured to perform the vibrating pressure method.

The depth shaker 32 according to the FIGS. 6A to 6C and 7A to 7G largely corresponds to the above embodiment according to the Figures 2 and 3 , to the description of which reference is made. The same, respectively corresponding details are therefore provided with the same reference numerals as in the FIGS. 1 to 5 ,

The device 32 has a mobile device 33 in the form of a tracked device. On a support arm of the tracked device a Mäklermast 34 is fixed, which is pivotable relative to the device 33 by means of a power-actuated actuator 35. On the Mäklermast 34 guide rails 36 are provided, on which a carriage 37 is movably guided. On the carriage, the actual depth shaker 38 is attached. The depth shaker 38 comprises the tube assembly 2 according to FIGS FIGS. 5A to 5C and the deep vibrator 39, which is connected to the pipe assembly 2 via a flexible coupling 40. In contrast to the above embodiment no container is provided in the present case, as a material addition does not take place in the soil during the Rütteldruckverfahren.

A cable tensioning device 45 holds the electric cable 46 for the deep vibrator 39 when telescoping the first tube body 3 relative to the second tube body 4 always curious and leads this after. For further details of the cable tensioning device 45, reference is made to the description of the first embodiment.

Due to the telescoping of the tube assembly 2, it is possible to create columns in the ground, which have a greater depth T2, as the height H of the Mäklermastes 34. The inventive method by means of the device according to the FIGS. 6A to 6C is in the FIGS. 7A to 7G shown. This corresponds to the method of the first embodiment, to the description of which reference is made.

FIG. 7A shows the device 32 in the starting position with located above the bottom edge 56 Tiefenrüttler 39, which is designed as Druckrüttler. In the first step, the deep vibrator 39 is shaken into the ground 57 up to the first depth T1, the soil being compacted in this first section (FIG. FIG. 7B ). Subsequently, the locking means 12 are released by hydraulic pressurization in the opening sense, and the upper first tubular body 3 is moved out by raising the carriage 37 from the lower second tubular body 4. While moving apart, the Rüttlerkabel 46 is held under tension using the cable tensioning device 45 and tracked. After reaching the upper end position ( FIG. 7C ), the locking means 12 are hydraulically closed again, so that the two tubular body 3, 4 are fixed together. Now the deep vibrator 39 is further shaken into the ground 57 until reaching the final depth T2 ( Figure 7D ). Subsequently, the compression takes place from bottom to top in predetermined elevation stages and time intervals until reaching the end of the stroke or an extended position ( Figure 7E ). After reaching the stroke end, the locking means 12 are released hydraulically again, and the carriage 37 is inserted with the attached first pipe body 3 back into the second tubular body 4. During the retraction process, the Rüttlerkabel 46 is held under tension with the help of the jig 52 and tracked. After reaching the inserted state ( FIG. 7F ), the locking means 12 are closed again. Now, the compression of the upper column section takes place in defined elevation stages and time intervals of the deep vibrator 39. The final state with ready-compacted column 58 is in FIG. 7G shown.

The pipe arrangements 2 according to the invention or the devices 32 equipped therewith have the advantage that it is possible to produce columns whose depth is greater than the space available above the floor edge 56 or the height H of the device 32. It is likewise possible to with the same depth of insertion, smaller devices 32 to use. Another advantage of the variable-length tube assembly 2 is that the transport length can be reduced.

LIST OF REFERENCE NUMBERS

2

Deep vibrator pipe arrangement

3, 4

(first, second) tubular body

5

first end

6

first connection means

7

second end

8, 9

(first, second) jacket pipe

10, 11

(first, second) cable tube

12

locking means

13

locking unit

14

locking element

15

admission

16

flange

17

end

18

flange

19

cup portion

20

ring section

21

opening

22, 23

bolt

24

Through opening

25

reinforcement

26

sealing arrangement

27

ring seal

28

sealing arrangement

29

ring seal

30

sealing body

32

Tiefenrüttelvorrichtung

33

device

34

Mäklermast

35

actuator

36

guide rail

37

carriage

38

Tiefenrüttelwerkzeug

39

deep vibrator

40

clutch

41

cantilever

42

winch

43

container

44

top

45

Cable tensioner

46

electric wire

47

Beam

48

first pulley

49

camp

50

adjusting arm

51

second deflection roller

52

jig

53

Weight

54

safety rope

55

Overload protection device

56

bottom edge

57

ground

58

pillar

59

piston

60

cylinder

61, 62

(first, second) hydraulic line

63, 64

pipe section

65

cover element

66

attack

67

end

68

connecting means

H

height

L

length

T

depth

Claims (15)

1. Depth vibrator pipe assembly (2) for connecting a depth vibrator (39) to a device (33), comprising:

   a first pipe body (3) which is connectable to the device (33);

   a second pipe body (4) which is connectable to the depth vibrator (39);

   characterised in that the first pipe body (3) and the second pipe body (4) are telescopeable relative to one another.
2. The depth vibrator pipe assembly (2) according to claim 1,
   characterized in
   that locking means (12) are provided via which the first pipe body (3) and the second pipe body (4) are detachably connectable to one another at least in a retracted position and in an extended position.
3. The depth vibrator pipe assembly (2) according to claim 2,
   characterized in
   that the locking means (12) comprise a plurality of locking units (13) which are arranged distributed over the circumference.
4. The depth vibrator pipe assembly (2) according to claim 3,
   characterized in
   that first locking units (13) are arranged in a first plane and second locking units (13) are arranged in a second plane, wherein the first plane and the second plane have an axial distance from one another.
5. The depth vibrator pipe assembly (2) according to claim 3 or 4,
   characterized in
   that the locking units (13) each comprise a locking element (14) and a compatible receptacle (15, 15'), wherein the locking element (14) is associated with one of the two pipe bodies (3, 4) and the receptacle (15, 15') is associated with the other one of the two pipe bodies (4, 3), and wherein the locking element (14) can be brought into engagement with the respective receptacle (15, 15') by radial displacement.
6. The depth vibrator pipe assembly (2) according to claim 5,
   characterized in
   that the locking elements (14) are supported on the associated pipe body (3, 4) by clamping bolts (22) and are radially movable, wherein the locking elements (14) in the clamped state engage in the respective receptacle (15, 15') of the other pipe body (4, 3) so that the first pipe body (3) and the second pipe body (4) are firmly connected to one another.
7. The depth vibrator pipe assembly (2) according to claim 5,
   characterized in
   that the locking element (14) is supported on the associated pipe body (3, 4) by a piston (59) and is radially movable by hydraulic pressurization of the piston (59), wherein the locking elements (14) in the braced state engage in the respective receiving elements (15, 15') of the other pipe body (4, 3) so that the first pipe body (3) and the second pipe body (4) are firmly connected to one another.
8. The depth vibrator pipe assembly (2) according to any one of claims 1 to 7,
   characterized in
   that at least one sealing arrangement (26, 28) is provided between the first pipe body (3) and the second pipe body (4) which seals the annular gap between the first pipe body (3) and the second pipe body (4).
9. The depth vibrator pipe assembly (2) according to any one of claims 1 to 8,
   characterized in
   that the first pipe body (3) and the second pipe body (4) are designed for use for a bottom-feed vibrator and each comprise a material pipe (8, 9) through which material for compacting the ground can flow as well as a cable conduit (10, 11) which is disposed laterally adjacent to the material pipe and through which an electrical cable (46) for the bottom-feed vibrator can be guided.
10. The depth vibrator pipe assembly (2) according to claim 9,
    characterized in
    that a reinforcement (25) is provided on an inner wall of the material pipe (8, 9) in the region of the locking units (13) which protects the locking unit (13) from through-flowing material.
11. The depth vibrator pipe assembly (2) according to any one of claims 1 to 8,
    characterized in
    that the first pipe body (3) and the second pipe body (4) are designed for use for a pressure vibrator and each have an inner channel through which an electrical cable (46) for the pressure vibrator can be guided.
12. Device (32) for depth vibration comprising:

    an apparatus (33) with a mast (34),

    a depth vibrator pipe assembly (2) according to any one of claims 1 to 11, which is held height-adjustably on the mast (34),

    a depth vibrator (39) which is fastened to a lower end (7) of the depth vibrator pipe assembly (2),

    a cable tensioning device (45) which is designed in such a manner that the electrical cable (46) for the depth vibrator (39) is guided in a tensioned condition during telescoping of the first pipe body (3) relative to the second pipe body (4).
13. The device (32) according to claim 12,
    characterized in
    that the cable tensioning device (45) is attached to the mast (34) and comprises a plurality of deflection pulleys (48, 51) via which the electrical cable (46) is guided, and a weight (53) which acts upon at least one of the deflecting rollers (51) in order to tension the cable (46).
14. The device (32) according to claim 12 or 13,
    characterized in
    that a carriage (37) is provided which is held in a height-adjustable manner on the mast (34) wherein the depth vibrator pipe assembly (2) and the cable tensioning device (45) are fastened to the carriage (37).
15. Depth vibration method for producing columns in the ground with an device according to any one of claims 12 to 14, comprising the steps:

    penetrating the depth vibrator (39) into the ground with retracted pipe assembly (2) as far as a first depth (T1);

    releasing the locking means (12) effective between the first pipe body (3) and the second pipe body (4);

    extending the pipe assembly (2) from the retracted into an extended position wherein the electrical cable (46) is guided by the cable tensioning device (45);

    closing the locking means (12) so that the first pipe body (3) and the second pipe body (4) are axially firmly connected to one another in the extended position;

    penetrating the depth vibrator (39) into the ground with extended pipe assembly (2) as far as a second depth (T2) which is greater than the first depth (T1);

    constructing a first column section in the ground upon pulling the depth vibrator (39) with extended pipe assembly (2);

    releasing the locking means (12) effective between the first pipe body (3) and the second pipe body (4) in the extended position;

    retracting the pipe assembly (2) from the extended into a retracted position, wherein the electrical cable (46) is guided by the cable tensioning device (45);

    closing the locking means (12) so that the first pipe body (3) and the second pipe body (4) are axially firmly connected to one another in the retracted position;

    constructing a second column section above the first column section upon pulling the depth vibrator (39) with retracted pipe assembly (2).

Images