EP3467205A1 - Method for creating a pile in the ground and ground processing device for same - Google Patents

Abstract

The invention relates to a method and a soil cultivation device for creating a pile in the ground. A soil tillage tool with a core tube is inserted into the soil creating a hole in the soil. The core tube is filled with a pile mass. At least upon retraction of the tillage tool from the ground, pile mass is introduced into the hole via the core tube, the pile being formed by the pile mass in the ground. According to the invention, a fill level of the pile mass in the soil working tool is detected by means of at least one sensor which is connected to a controller. By means of the control, an introduction of the tilling tool into the ground and / or a retraction of the tilling tool from the ground is controlled as a function of the detected fill level.

Description

The invention relates to a method for creating a pile in the ground, in which a soil working tool is introduced into the soil with a core tube and a hole is made in the ground, the core tube is filled with a pile mass or is and at least upon retraction of the tillage tool from the ground Pile mass is introduced into the hole via the core tube, wherein the pile is formed by the pile mass in the ground, according to the preamble of claim 1.

The invention further relates to a harrow with a soil tilling tool with a core tube for creating a hole in the ground, wherein the core tube is filled with a pile mass, and a control for introducing and pulling the tillage tool from the ground, according to the preamble of claim 11.

A generic method and a generic tillage implement go out of the EP 1 849 918 B1 out. In this known cultivator a Verdrängerbohrrohr is used, which has at its upper end a tubular bunker for receiving filler. Filling material can be introduced into the tube bunker of the hollow displacement drill pipe via a feed device. After reaching a desired depth of the drill pipe is withdrawn and the well filled with filler from the tube bunker on the drill pipe.

From the EP 1 519 000 B1 a displacement drill pipe is known, which has at its lower end a larger diameter displacer head. A lower one The orifice on the displacer head disengages from the ground as the drill pipe retracts and the displacer head remains in the ground.

Other tillage equipment with a drill pipe for displacement drilling are in the US 6,033,152 A the GB 2 377 235 A and the EP 1 270 869 A1 disclosed. In these positive displacement pipes, concrete material is preferably supplied by means of a concrete pump via a hose line to an upper connection opening on the drill pipe.

To create a pile in the ground, the supply of a precise amount of pile mass is desired. If too little pile mass is introduced into a borehole, the pile is not formed completely or incorrectly. If too much filler is provided, excess pile mass may leak out of the wellbore and contaminate the environment. In particular, when using concrete, this can lead to complex cleaning measures.

From the EP 1 580 325 B1 a pipe bunker for a positive displacement drill pipe is known in which a closure device is provided at an outlet opening, wherein with the closure device a discharge of concrete can be prevented.

The invention has for its object to provide a method and a soil cultivation device for creating a pile in the ground, with which a pile is particularly efficient to produce.

The object is achieved according to the invention on the one hand by a method having the features of claim 1 and on the other hand by a cultivator with the features of claim 11. Preferred embodiments are given in the respective dependent claims.

A basic idea of the invention may be seen to preferably detect a level of pile mass in the soil working tool continuously by means of at least one pick-up, the pick-up being in communication with a controller. In this case, the controller according to the invention may be designed so that it controls depending on the detected level of introduction of the tillage tool into the ground and / or retraction of the tillage tool from the ground. Preferably, in the control Data for the used tillage tool deposited so that the control already determined when introducing the tillage tool into the ground the need for pile mass for filling the borehole and to create the pile. By matching the data to the required amount of pile mass and the amount available in the machining tool can be automatically determined and controlled as needed feed to pile mass.

This can avoid underfilling or overfilling of the borehole, which contributes to increasing the quality of the pile and preventing excess pile pile consumption.

A further advantage of the invention can be seen in the fact that no excessive mass of material, in particular concrete, must remain in the tilling tool. As a result, contamination and damage to the soil tillage tool are avoided by fixed or hardened pile mass. The cleaning and maintenance of the tool is reduced.

In principle, the hole can be created in the ground using any drilling method, in particular also with a material-removing method in which soil material is removed from the ground. A particularly efficient method results according to an embodiment of the invention in that the hole is created by displacing soil material into the surrounding soil. In such positive displacement drilling, the soil material is displaced laterally into the borehole wall, whereby the borehole wall is solidified and additionally supported. By supplying the pile mass as required during the retraction of such a displacement drilling tool, it is ensured that the pile wall is always reliably supported either by the soil working tool or by the filled pile mass.

In principle, the soil working tool can be introduced into the soil by an axial pressing, striking or driving movement. According to a development of the invention, it is particularly expedient that a boring tool, in particular a positive displacement drill, is used as the tilling tool which is driven in rotation. As a result, a borehole can be created in a particularly gentle manner and soil material can be displaced radially into the surrounding floor area.

In principle, the pile mass can emerge at any point, in particular at the lower end of the soil working tool, from one or more openings. According to one embodiment variant of the invention, it is particularly preferred that the pile mass at the lower region of the soil cultivation tool exit from an opening which is closed by means of a releasable closure device, in particular a lost pile shoe. The closure device may be, for example, a flap opening. In a so-called lost closure device, the outlet opening is located at the lower end of the tubular tillage tool. On the opening, a plate-shaped or conically downwardly tapering pile shoe loosely or by a simple mechanical locking device is placed. The pile shoe is held by the propulsion force during insertion of the hole on the tillage tool. When retracting the soil working tool, the pile shoe releases directly or by a previously performed unlocking movement. Now can emerge from the thus opened opening pile mass. The ceiling-shaped closure device remains as a lost pile shoe in the ground. The pile shoe is preferably formed of a metal material or even of concrete material.

For a most efficient determination of the level, it is provided according to a development of the invention that the level is measured without contact, in particular by means of radar. For level measurement, any measuring devices or sensors may be provided, including floats or buttons. Particularly advantageous are non-contact sensors, such as optical sensors, in particular sensors by means of radar are particularly useful. These provide a very accurate measurement with a low maintenance and cleaning costs.

For receiving a particularly large amount of pile mass, it is preferred according to an embodiment variant of the invention that the core tube of the machining tool has an enlarged storage section at its upper end region, in which pile mass is taken up and stored. The Storage portion may be formed as a diameter larger and at least in its lower portion conically shaped tube bunker. In this case, the receiving volume of the core tube with the storage section is designed so that the entire pile mass, which is required for forming a pile in the ground, can be accommodated therein. Thus, when retracting the tillage tool from the ground no additional pile mass must be introduced via a feed more in the core tube. Overall, a particularly efficient and reliable method for creating a pile can be achieved.

According to a development of the invention, it is particularly advantageous that a desired fill level of the pile mass in the core tube is determined and / or adjusted by the controller as a function of a predefinable pile depth. This allows a machine operator to enter into the controller a desired pile depth. Depending on the values of the dimensions of the soil working tool, which are stored in a memory of the control, the control can now determine the demand and thus a necessary level of pile mass in the core tube. If the pile mass is not yet or not completely introduced into the core tube, the controller can determine the current level and initiate necessary pile mass before or during the creation of the hole in the ground or during retraction of the tillage tool in the core tube. For this purpose, via the control, a corresponding feed device, in particular a pump, can convey additional pile mass from a reservoir to pile mass.

A further advantageous control variant results according to a development of the invention in that a depth of penetration is determined and / or adjusted by the controller as a function of a given amount of pile mass. If, for example, a tillage tool has to be emptied at the end of a working day, the controller can determine an existing quantity in the core tube of the tilling tool and, depending thereon, determine the pile depth with which the existing pile mass is used exactly or largely exactly. Typically, the penetration depth thus determined is greater than a predetermined minimum depth for the pile to be created, which is required for static reasons.

Even if a slightly larger pile is created, however, the added benefit of complete drainage of the core tube can be achieved. This significantly reduces cleaning and maintenance of the tillage tool at the end of the work.

A further advantageous variant of the method according to the invention consists in that a pile mass is supplied to the core tube by means of a feed device which is controlled and / or monitored by the control. If the pile mass in the core tube is not sufficient to create a desired pile with a given pile depth, the supply of additional pile mass in a necessary amount can be controlled and monitored by the control during the pile production. The feeder is preferably a pump, in particular a so-called concrete or peristaltic pump. With this concrete or other filling material can be promoted in the core tube of the tillage tool.

In principle, with the method according to the invention, an arbitrary amount can be introduced into an established hole in the bottom in a precisely metered manner. It is particularly advantageous according to a method variant of the invention that the control of the creation of the pile is controlled so that the core tube is emptied when the tillage tool is pulled out of the ground. It is created in a particularly efficient way, a pile, with an excess consumption of pile mass is avoided. It can be taken into account in the control by appropriate correction factors that the required amount of pile mass not only corresponds to the volume of the created bottom hole, but that pile mass can occur in the surrounding soil. By the correction factors, which can take into account a different soil structure, so an amount of additional material can be calculated, which is required for the actual filling of the hole in the soil. The correction factors can be saved or entered by the machine operator.

With regard to the soil working tool, the invention is characterized in that at least one pick-up for detecting a level of pile mass is disposed in the core tube and communicates with the controller and that the controller is formed, an insertion into the ground or retraction the tillage tool depending on the detected level to control.

In particular, the above-described method can be carried out with the cultivator. In this case, the advantages described above can be achieved.

A preferred embodiment of the soil cultivation device according to the invention is that the soil cultivation tool is designed as a drilling tool with a displacement section. The displacer section is located in a lower end region of the tubular tillage tool. The tubular soil working tool is preferably closed by a closure device, in particular a lost pile shoe, at its lower end. Upon retraction of the pile, the closure device loosens, so that pile mass can escape from the tubular soil working tool through the lower outlet opening, with the hole being filled in the ground.

Fig. 1

eine Seitenansicht eines erfindungsgemäßen Bohrgeräts, und

Fig 2

eine Prinzipskizze zur Erfindung.

The invention will be further elucidated on the basis of preferred exemplary embodiments, which are illustrated schematically in the drawings. In the drawings show:

Fig. 1

a side view of a drill according to the invention, and

Fig. 2

a schematic diagram of the invention.

In Fig. 1 an embodiment of a tillage device 1 according to the invention is shown. The harrow 1 has a drive on which a mast 2 is pivotally mounted. On the mast 2, a carriage 22 is slidably mounted in a drilling direction along the mast 2.

On the carriage 22 designed as a rotary drive drill drive 11 is arranged on the output shaft 19, a tillage tool 10 with a core tube 6 rotatably and preferably mounted axially fixed. By actuating the drilling drive 11, the tubular soil working tool 10 can be set in rotation. By moving the carriage 22, the soil working tool 10 can be moved with the core tube 6 via the drill drive 11 axially in the drilling direction. The core tube 6 is connected to the output shaft 19 of the drill drive 11 via a down to the drive shaft 19 arranged, releasable pipe coupling 18 is connected.

The core tube 6 is constructed in several parts from a plurality of tubular elements, which are connected to each other via detachable pipe couplings. At the lower end of the soil working tool 10, a Verdrängerbohrkopf 80 is arranged with a larger diameter displacement section with conical inlet and outlet area. At the lower end of the soil working tool 10, a conical pile shoe is attached as a closure device 82. When creating a hole in the ground with the soil working tool 10, after reaching a desired final depth, the closure device 82 can be detached from the soil working tool 10, so that a center opening of the core tube 6 is opened for feeding pile mass into the hole in the ground.

The drill drive 11 has a drive part 12 with a hydraulic motor and a ring-like gear part 13, which serves to transmit torque to the soil working tool 10.

For receiving pile mass, a funnel-like storage section 30 is arranged above the tubular soil cultivation tool 10. The storage section 30 of the tillage tool 10 is designed to receive pile mass, in particular concrete. Via a conical outlet region 34 of the storage section 30, this is connected to an extension section 40 of the soil cultivation tool 10. The extension portion 40 of the soil working tool 10 projects through the drill drive 11 upwards.

For introducing pile mass into the funnel-shaped storage section 30, a nozzle-like feed device 20 is provided at the upper end of the mast 2. The feeder 20 is connected via a hose, not shown, with a pump, not shown, for feeding pile mass.

At the soil working tool 10, in particular at the storage portion 30, a pickup 33 for detecting the level of pile mass in the soil working tool 10, in particular the core tube 6 and the storage section 30, is arranged. The transducer 33 is connected to a control, not shown, which preferably in the uppercarriage of the tillage implement 1 is housed. The connection between the controller and the transducer 33 may be wireless or wired. Depending on the detected fill level, the controller controls an introduction of the tilling tool 10 into the ground and / or a retraction of the tilling tool 10 out of the ground. Preferably, the control is such that the core tube 6 is emptied when the tillage tool 10 is pulled out of the ground. In this case, depending on a desired final depth for the pile to be created, the control can ensure a defined filling of the soil cultivation tool 10 with pile mass in a demand-oriented quantity by means of the feed device 20. Further, the controller can determine the level of pile mass in the soil working tool 10 via the transducer 33 and specify a final depth when introducing the hole in the soil depending on the available pile mass. The hole is created with such a final depth that the hole when retracting the tillage tool 10 is filled from the ground exactly.

According to the outline of Fig. 2 is very schematically illustrated an inventive drill 1 with a mast 2. On the mast 2, a carriage 22 is mounted, which is mounted via a winch 60 by means of a drive motor 64 and a cable 62 adjustable. At the top and bottom of the mast 2 deflection rollers 3 are arranged, via which the cable 62 is guided to the winch 60.

On the carriage 22, a rotary drive 11 is mounted, with which a tubular soil working tool 10 with a core tube 6 can be introduced into the ground. The core tube 6 is closed at its lower end with a closure device 82, which is designed as a lost pile shoe. At the upper end of the core tube 6, a conically enlarged storage portion 30 is attached. The core tube 6 and the storage section 30 are filled with pourable pile mass 40, which in particular can be gravel, sand or a hardenable mass, preferably concrete.

Via a sensor 33, which preferably operates on a radar basis, a level in the soil working tool 10 can be detected. The transducer 33 is connected to a controller 50, in particular a programmable logic controller PLC, for data transmission in combination. The memory section 30 is over a line 21 is connected to a pump as a feeder 20, so that via the line 12 by means of the pump pile mass 40 can be introduced into the soil working tool 10. On the line 21, a flow meter 52 may be provided for detecting the amount passed. The flowmeter 52 is also in data communication with the controller 50.

Furthermore, a position of the soil working tool 10 and in particular a depth of insertion of the controller 50 via a corresponding control and monitoring of the drive motor 64 of the winch 60 done. Thus, the controller 50 can be detected, on the one hand, the pile mass 40 available in the soil working tool 10 as well as a receiving volume of a hole, which is introduced into the soil with the soil working tool 10. Depending on the present measurements, control of the introduction of the soil tillage implement 10 into the ground, pulling it from the ground, or filling the soil tillage implement 10 with pile mass 40 may thus be controlled via the feeder 20.

Claims (12)

Method for creating a pile in the ground, in which a soil working tool (10) with a core tube (6) is introduced into the soil and a hole is created in the soil, - The core tube (6) is or is filled with a pile mass (40) and - at least when retracting the soil tillage implement (10) from the soil via the core tube (6) pile mass (40) is introduced into the hole, wherein by the pile mass (40) of the pile is formed in the ground, characterized, - That a filling level of the pile mass (40) in the soil working tool (10) by means of at least one sensor (33) is detected, which is in communication with a controller, and - That by means of the controller (50) an introduction of the tillage tool (10) is controlled in the soil and / or retraction of the tillage tool (10) from the ground depending on the detected level. Method according to claim 1,
characterized,
that the hole is created by displacing soil material into the surrounding soil. Method according to claim 1 or 2,
characterized,
in that a drilling tool (80), in particular a displacement drill, which is driven in rotation, is used as the soil working tool (10). Method according to one of claims 1 to 3,
characterized,
in that the pile mass (40) at the lower region of the tilling tool (10) emerges from an opening which is closed by means of a releasable closure device (82), in particular a lost pile shoe. Method according to one of claims 1 to 4,
characterized,
that the filling level is measured without contact, in particular by means of radar. Method according to one of claims 1 to 5,
characterized,
in that the core tube (6) of the tilling tool (10) has an enlarged storage section (30) at its upper end region, in which pile mass (40) is received and stored. Method according to one of claims 1 to 6,
characterized,
in that a desired fill level of the pile mass (40) in the core tube (6) is determined and / or adjusted by the controller (50) as a function of a predefinable pile depth. Method according to one of claims 1 to 7,
characterized,
in that a penetration depth is determined and / or adjusted by the controller (50) as a function of a given amount of pile mass (40). Method according to one of claims 1 to 8,
characterized,
in that a pile mass (40) is fed to the core tube (6) by means of a feed device (20) which is controlled and / or monitored by the controller (50). Method according to one of claims 1 to 9,
characterized,
that the control (50) controls the making of the pile so that the core tube (6) is emptied when the soil working tool (10) is pulled out of the ground. Soil cultivation device, in particular for carrying out the method according to one of claims 1 to 10, with - A tillage tool (10) having a core tube (6) for creating a hole in the ground, wherein the core tube (6) with a pile mass (40) can be filled, and a controller (50) for introducing and removing the soil tillage implement (10) from the ground, characterized, - That at least one sensor (33) for detecting a level of pile mass (40) in the core tube (6) is arranged and with the controller (50) is in communication and - That the controller (50) is adapted to control an introduction into the ground or retraction of the tillage tool (10) depending on the detected level. Soil cultivation device according to claim 11,
characterized,
that the soil working tool (10) is designed as a drilling tool (80) with a displacer.

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