Method and device for producing foundation elements in ground with soil mortar

Abstract

The invention relates to a method for producing a foundation element in a ground from a soil mortar, comprising a ground removal device with at least one rotationally driven treatment tool, the at least one treatment tool being moved substantially vertically relative to the ground, the soil material is removed by at least one rotationally driven treatment tool by forming holes in the soil, a solidifiable suspension is fed into the holes, and the removed soil material remains at least partially in the holes and is mixed in situ with the fed suspension by the at least one rotationally driven treatment tool to form a soil mortar, after the at least one rotationally driven treatment tool has been pulled out of the hole, the formed soil mortar hardens in the ground into the foundation element, at least one vertical movement of the at least one treatment tool, a rotational movement of the at least one treatment tool, the supply of the suspension and at least one dimension of the foundation element representing the method parameters.

Description

Technical Field

[0001] The invention relates to a method for creating a foundation element in the ground with a soil mortar according to the preamble of claim 1, comprising a soil removal device with at least one rotationally driven processing tool, wherein the at least one processing tool is moved essentially vertically relative to the ground, and soil material is removed by the at least one rotationally driven processing tool by forming a hole in the ground, a settable suspension is supplied into the hole, and the removed soil material at least partially remains in the hole and is mixed in situ with the supplied suspension by the at least one rotationally driven processing tool to form a soil mortar, wherein after the at least one rotationally driven processing tool has been withdrawn from the hole, the formed soil mortar hardens in the ground to form the foundation element, wherein at least the vertical movement of the at least one processing tool, the rotational movement of the at least one processing tool, the supply of suspension and at least one dimension of the foundation element represent method parameters.

[0002] The invention also relates to a device for creating foundation elements in the ground with soil mortar according to the preamble of claim 10, comprising a soil removal device with at least one rotationally driven processing tool, wherein the device is configured to move the at least one processing tool essentially vertically relative to the ground and to remove soil material by forming a hole in the ground by means of the at least one rotationally driven processing tool, wherein a settable suspension is supplied into the hole by means of a supply device and the supplied suspension is mixed in situ with the removed soil material in the hole by means of the at least one rotationally driven processing tool to form a soil mortar, wherein after the at least one rotationally driven processing tool has been withdrawn from the hole, the formed soil mortar hardens in the ground to form a foundation element, wherein at least the vertical movement of the at least one processing tool, the rotational movement of the at least one processing tool, the supply of suspension and at least one dimension of the foundation element represent method parameters. Background Art

[0003] Foundation elements made from soil mortar are particularly economical and environmentally friendly. Unlike conventional mortars, where the binder is mixed with a liquid and supplied aggregate (especially sand or gravel), the aggregate used in soil mortar is soil material directly generated during soil cultivation. This saves costs associated with extracting and transporting the aggregate to the construction site. By using soil material directly generated during soil cultivation for the soil mortar, the costs associated with removing excavated material from the construction site and dumping the removed soil material are also reduced.

[0004] However, creating foundation elements, especially foundation piles or retaining walls or sealing walls, in the ground with soil mortar requires considerable effort when forming the foundation elements to ensure adequate execution quality and avoid unnecessary, excessive consumption of the settable suspension. Furthermore, creating a hole in the ground, where the foundation elements are produced in situ from the soil mortar formed directly in the hole, is particularly challenging for the machine operator. In particular, a sufficient rotational speed of the processing tool and an appropriate delivery rate for supplying the settable suspension must be ensured in order to achieve high-quality completion of the foundation elements with soil mortar. These requirements may vary depending on local conditions and the respective working depth. This requires a high level of concentration and extensive experience from the machine operator.

[0005] EP 1 452 645 B2 describes a universal method for creating a diaphragm wall (also known as a continuous wall) in the ground. A diaphragm wall milling machine with a rotating milling wheel is lowered into the ground, where soil material is removed and pulverized. The removed soil material is mixed with a settable suspension in the milling trough, where a soil mortar is formed. Before the soil mortar hardens, the diaphragm wall milling machine is withdrawn from the mortar-filled milling trough. A crane can also be used to insert support beams into the soil mortar before the soil mortar hardens.

[0006] This method for creating a retaining wall in the ground with soil mortar is also called CSM TM method.

[0007] For example, DE 10 2004 005 967 A1 discloses the use of drilling and mixing augers, in particular drilling and mixing augers arranged parallel to one another, to similarly form a support or drill wall in the ground with soil mortar. Here, the soil material removed during drilling is mixed with a settable liquid in the borehole to form a soil mortar. This method is particularly known as MIP. TM is known by the name of . Summary of the Invention

[0008] The present invention addresses the problem of specifying a method and a device with which foundation elements can be produced in the ground using soil mortar particularly efficiently and with high technical quality.

[0009] This problem is solved on the one hand by a method having the features of claim 1 and on the other hand by a device having the features of claim 10. Preferred embodiments of the invention are given in the dependent claims.

[0010] The method according to the invention is characterized in that the method is at least partially performed automatically by means of a control device, wherein at least one method parameter is input as a default value into the control device and at least one remaining method parameter is set and controlled by the control device as a function of the at least one input default value.

[0011] The basic idea of the present invention is not to leave the method for creating foundation elements in the ground with soil mortar entirely to the machine operator's experience, but rather to provide a control device that can partially or fully automatically execute the method. To this end, the control device is configured such that at least one default value is specified as a method parameter by the machine operator or a control center, while the remaining necessary method parameters are determined and controlled by the control device according to a control program. The control device can preferably be configured such that, depending on the construction site and, in particular, the machine operator's or control center's specifications, which method parameter or parameters are used as default values, and which method parameters are determined and readjusted by the control device based on this, can be freely set.

[0012] The control logic or control program of the control device can be formed by stored formulas or, in particular, pre-calculated tables stored in the control device. For example, the supply of the solidifiable suspension can be controlled by specifying the vertical movement and / or rotational speed of the processing tool as default values. Alternatively, the supply amount or supply rate of the solidifiable suspension can be specified, while the control device controls the appropriate rotational speed and / or appropriate vertical movement of the processing tool. In the case of vertical movement, the control device can control the lowering, the raising, or preferably both.

[0013] The method according to the invention makes it possible to create foundation elements made of soil mortar particularly efficiently with high and largely consistent quality. In the context of the present invention, the term "foundation element" is to be understood generally and encompasses not only foundation elements but also coverings, seals, support and blocking elements, as well as other elements created in the ground. Such foundation elements made of soil mortar may also be referred to as soil mixing elements.

[0014] The necessary general method parameters for creating foundation elements from soil mortar may in particular be the vertical movement of at least one processing tool, the rotational movement of at least one processing tool, the supply of suspension and at least one dimension of the foundation element.

[0015] According to a further development of the invention, the method parameters include or additionally have at least one of the following parameters: the rotational speed of the processing tool, the rotational direction of the processing tool, the torque of the processing tool, the number of revolutions per depth stroke of the processing tool, the vertical movement speed or vertical feed force when lowering or pulling up the processing tool, the supply rate of the suspension, the supply amount of the suspension, or a combination of these parameters. The parameters "rotational speed of the processing tool, the rotational direction of the processing tool, the torque of the processing tool, and the number of revolutions per depth stroke of the processing tool" represent, for example, the characteristics of the generally maintained method parameter "rotational movement of at least one processing tool". The parameter "vertical movement speed or vertical feed force when lowering or pulling up the processing tool" is to be assigned to the method parameter "vertical movement". To this end, the control device can be connected to corresponding sensors for directly detecting or determining the method parameters, and to corresponding regulating devices on the drilling device, in particular for actuating and influencing corresponding drive devices, such as feed drives, rotary drives, supply pumps, etc. The parameters "supply rate of suspension and supply amount of suspension" refer to the general method parameter "supply of suspension". The method parameter “dimensions of the foundation element” can relate to the diameter of the foundation element, its axial length / depth, a particular outer contour, such as cylindrical, conical or with a disk-shaped contact surface.

[0016] Another preferred embodiment of the present invention is that the at least one rotationally driven processing tool comprises a drilling tool that is rotationally driven about a substantially vertically oriented drilling axis, wherein the hole is created by drilling. In particular, the drilling axis and the advancement direction lie in the same direction. The method can be implemented using a well-known earth drilling rig having one or more rod-shaped processing tools arranged adjacent to one another in parallel and configured for removal and mixing.

[0017] Alternatively, an advantageous configuration of the invention consists in that at least one rotationally driven machining tool comprises a milling wheel, which is rotationally driven about a substantially horizontally oriented milling wheel axis, wherein the hole is created by milling. The horizontal milling wheel axis and the vertical advancement direction are transverse to each other. In particular, the at least one milling wheel can be arranged on a so-called bulkhead milling machine. Preferably, the two milling wheels are arranged as a pair of milling wheels on a common end shield, which is located between the two milling wheels. Further preferably, such two pairs of milling wheels are arranged on the underside of a support frame of the bulkhead milling machine, so that approximately rectangular milling holes are created when the bulkhead milling machine is lowered or sunk into the ground.

[0018] The milling device can preferably be lowered into the ground via a suspension cable solely due to the weight of the milling device or via a guide rod, with the aid of which the feed force can preferably be applied. A settable suspension is preferably introduced into the milling groove formed in the region of the at least one milling wheel. The rotation of the at least one milling wheel removes and comminutes the existing soil material and mixes it with the supplied suspension to form a soil slurry.

[0019] A preferred variant of the method according to the invention also consists in that at least one of the rotationally driven processing tools has at least one removal element, by means of which the soil material is removed and comminuted, and / or at least one mixing element, by means of which the removed soil material is mixed with the supplied suspension. The at least one additional mixing element can be a mixing paddle or a mixing blade on a vertically oriented drill rod or on the outer periphery of at least one milling wheel. The drill rod is preferably configured in a tubular manner, in which a central supply channel for supplying the suspension is formed. In the case of a watertight wall milling machine, scraper elements can also be arranged on the frame, which come into meshing contact with removal teeth on the periphery of the milling wheel, in order to achieve a particularly good mixing effect in this way.

[0020] According to a refinement of the present invention, it is preferred that the supply of suspension to the hole and the movement of at least one rotationally driven processing tool are input into the control device as default values, and the basic vertical movement of at least one rotationally driven processing tool is set by the control device according to the input default values. The rotation of the processing tool can be related to a specific ratio between the rotational speed, torque and / or rotational speed and propulsion force. For example, if the soil is loose, a larger vertical movement can be set or a larger vertical movement can be achieved by a certain rotational movement. On the contrary, if the soil is harder, the axial advance must be reduced accordingly to maintain the desired rotational movement, in particular the rotational speed must be set.

[0021] Another preferred embodiment of the present invention can be seen in the fact that the vertical lowering of the at least one rotary-driven processing tool is set by the control device, if it is not the default value, and / or the vertical extension of the at least one rotary-driven processing tool is set, if it is not the default value. For example, the control device can set the appropriate vertical lowering of the rotary-driven processing tool based on a predetermined rotational speed or a predetermined torque. The vertical lowering can refer to the ratio between the lowering and the amount of suspension supplied. The same applies to the vertical extension of the rotary-driven processing tool, so that when the method is performed, a consistent, high-quality soil mortar can be produced.

[0022] In particular, according to a refinement of the method according to the invention, it is preferred that the rotation of the processing tool and / or the feed rate and / or feed amount of the suspension be set by the control device, if these are not default values. In particular, a particularly high and consistent mortar quality can be achieved by controlling and setting these parameters by the control device.

[0023] In order to control and set the rotary movement of the processing tool, the rotary drive can be controlled in particular by the control device. With regard to the vertical movement, the vertical drive, in particular an actuating cylinder or a cable mechanism for the vertical movement, can be controlled by the control device.

[0024] Regarding the control of the suspension amount, according to one embodiment of the present invention, it is advantageous if a suspension pump, through which the suspension is supplied to the bore, is controlled by a control device. The suspension pump can be a positive displacement pump, in particular a peristaltic pump or a progressive cavity pump. In particular, the control device is connected to the pump drive for this purpose, allowing the amount of suspension supplied to be directly adjusted according to the movement of the processing tool.

[0025] The invention also includes a device for creating foundation elements in the ground with soil mortar, characterized in that a control device is provided and configured, with which the creation of the foundation element can be carried out at least partially automatically, wherein at least one method parameter is input as a default value into the control device and the basic vertical movement of at least one rotationally driven processing tool is set by the control device in accordance with the input default value.

[0026] The device is configured in particular to carry out the method according to the invention described above. The advantages described above can be achieved with the device.

[0027] In principle, the device for creating foundation elements can be configured in any suitable form. According to one embodiment of the invention, it is advantageous if the device is configured as a drilling device, wherein the at least one rotationally driven processing tool comprises a drilling tool, which is rotationally driven about a substantially vertically oriented drilling axis. In a simple case, the drilling tool can be a continuous drilling auger. Preferably, the drilling tool can have a removal device on its lower side for removing soil material and, subsequently, further elements upwards for transporting and / or mixing the removed soil material with a suspension, such as mixing blades. Preferably, the drilling tool can include a central supply channel, through which the suspension can be fed from above and introduced into the surrounding borehole via at least one lower outlet opening and / or at least one lateral outlet opening along the central drill string.

[0028] According to a refinement of the present invention, it is particularly preferred for the drilling device to have multiple drilling tools arranged adjacent to each other in parallel. This allows for the creation of elongated boreholes in the ground in a transverse direction. The individual drilling tools can be arranged and matched to each other so that the boreholes at least partially overlap, forming an elongated drill slot.

[0029] Alternatively, according to a variant embodiment of the device according to the invention, it is preferred that the device is configured as a milling machine, in particular a diaphragm wall milling machine, wherein the at least one rotationally driven processing tool comprises a milling wheel that is rotationally driven about a substantially horizontally oriented milling axis. Milling teeth and preferably also mixing elements are arranged on the outer circumference of the milling wheel hub, so that soil material can be removed by the milling wheel and mixed with a supplied settable suspension to form a soil slurry. The suspension is preferably supplied close to the at least one milling wheel.

[0030] In this case, it is particularly advantageous for the milling machine to have multiple milling wheels, in particular two pairs of milling wheels, arranged adjacent to each other and in parallel. In particular, using two such pairs of milling wheels on the underside of the milling device's support frame, when the milling device is lowered vertically, a roughly rectangular milling hole can be created in the ground, extending vertically downward into the ground. The milling machine or milling device is thus configured as a so-called watertight wall milling machine. By aligning the correspondingly generated milling holes, a milling trench of virtually any length can be created in the ground, which can be filled with soil mortar to form a watertight wall.

[0031] The device can be configured as a stationary or mobile device. In a mobile embodiment, the device has a chassis, in particular a crawler chassis. Preferably, a mast can be arranged on a rotatably mounted superstructure, along which the processing tool can be guided in a vertically displaceable manner.

[0032] A preferred embodiment of the present invention is also that a suspension pump is arranged for supplying the suspension into the hole, wherein the suspension pump is controlled by a control device. With the help of the suspension pump, the solidifiable suspension can be supplied from the surface of the land (for example from a preparation device or a storage tank) to the processing tool in the land. In particular, the control device can control both the rotary drive for the processing tool and the drive for the suspension pump in a coordinated manner, so as to always ensure that the solidifiable suspension is supplied to the hole for producing the soil mortar based on the needs. In principle, the control device can also be connected to a preparation system for preparing the suspension, which preparation system is connected upstream of the suspension pump. In this way, the control device as a whole can control the device for creating the foundation element, the suspension pump and the preparation system in a coordinated manner, so that demand and / or capacity-oriented suspension preparation and supply in the land are achieved to efficiently create the foundation element.

[0033] In order to illustrate the invention and the method according to the invention, reference is made to the following preferred exemplary embodiments when creating foundation piles with soil mortar.

[0034] A suspension volume of 980 l / m (liters / meter) per foundation element to be installed is specified as a default value for creating the foundation element and forming the required soil mortar. Another specified method parameter is a maximum advance or extraction speed of 0.5 m / min (meters / minute) for the soil processing tool (especially the drilling tool). Another current method parameter is a maximum delivery rate of 525 l / min (liters / minute) for the suspension pump. To ensure a suspension volume of 980 l / m (liters / minute) per foundation element to be installed, the control device sets the feed rate to 0.43 m / min, so as not to exhaust the maximum advance speed, but rather to utilize the maximum delivery rate of the suspension pump and ensure the specified suspension volume per meter.

[0035] If, on the other hand, the amount of suspension to be installed in another exemplary embodiment is only 450 l / m of foundation element, a maximum pump delivery rate of 425 l / min would result in a theoretically conceivable advance speed of 0.94 m / min, but the control device sets the advance or feed rate to 0.5 m / min based on the default value of the existing device's maximum advance speed of 0.5 m / min (i.e. the maximum possible advance speed of the device) and adjusts the delivery rate accordingly so that the target amount is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The present invention will be further explained below with reference to preferred exemplary embodiments, which are schematically shown in the accompanying drawings. In the drawings:

[0037] Figure 1 A perspective view showing a first embodiment of a device according to the invention, which is configured as a milling device;

[0038] Figure 2 Shown in partial cutaway side view Figure 1 An enlarged detailed view of the milling machine of the device;

[0039] Figure 3 Display by using Figure 2 A schematic image of a milling machine producing foundation elements in the ground is shown;

[0040] Figure 4 show Figure 1 A schematic side view of the apparatus in creating a foundation element in the ground;

[0041] Figure 5 Shows a side view of another apparatus according to the present invention, configured as a drilling apparatus;

[0042] Figure 6 show Figure 5 an enlarged elevational view of a drilling tool used in the apparatus shown in FIG; and

[0043] Figure 7 Schematic screen images showing a control device for use with the present invention. DETAILED DESCRIPTION

[0044] Figure 1 , a device 30 for creating foundation elements in the ground according to the present invention is shown, which is specifically configured as a diaphragm milling machine 50. The device 30 preferably comprises a carrier 32 with an undercarriage 33, which can be configured in particular as a crawler chassis. A superstructure 34 can preferably be arranged on the undercarriage 30 and can preferably be rotatably mounted about a vertical axis of rotation. During operation, a substantially vertical mast 35 can be attached to the carrier 32, in particular the superstructure 34.

[0045] In the device 30 configured as a diaphragm milling machine 50, a milling machine 60 with a guide rod 52 is displaceably arranged along a mast 35 as a soil removal device 40. The processing device 40 can have a milling wheel 64 as a processing tool 42 for removing soil material, as described below in conjunction with Figure 2 As will be explained in more detail.

[0046] according to Figure 2 The milling machine 60 has a compact frame 61, which is smaller in cross-sectional dimension than the cross-sectional area of the milled hole produced by the milling machine 60. Two plate-like end shields 62 are attached to the lower side of the frame 61 adjacent to each other, and a milling wheel 64 is mounted on each of their side surfaces.

[0047] The milling wheels 64 on the end shields 62 are coaxial with one another, so that a pair of milling wheels is formed on each end shield 62. Removal elements for removing, in particular milling away, soil material are arranged along the outer circumference of each milling wheel 64 in a generally known manner. The milling wheels 64 are each driven in pairs via an associated drive 63, wherein the two drives 63 provided are preferably arranged in a housing-like frame 61 of the milling machine 60.

[0048] Attached to the guide rods 52 is a frame 61, through which a suspension feeder 54 extends for supplying a settable suspension. The tubular suspension feeder 54 opens below the frame 61, between two pairs of milling wheels 64. During milling, the soil material removed by the milling wheels 64 can be mixed directly with the settable suspension flowing from the suspension feeder 54 in the area of the milling wheels due to their movement, thereby forming a soil slurry in situ. Radially protruding removal elements 66 can also serve as mixing elements for mixing the milling cuttings with the suspension. Additional paddle-shaped mixing elements can also be preferably arranged on the milling wheels 64.

[0049] The mixing can also be supported by plate-like scrapers 68, which are attached to the underside of the frame 61 and can extend into the area of the removal elements 66 arranged in a row to scrape off adhering soil material. The rotational movement of the milling wheel 64 and the arrangement of the scrapers 68 can particularly help to transport the mixture of milling chips and suspension upwards through the frame 61 into the rear area of the milling trough.

[0050] Figure 3 and Figure 4The process and method for forming a foundation element 8 in the ground 1 are further schematically shown. A milling machine 60 with a rotating milling wheel 64 is lowered essentially vertically into the ground 1 via a guide rod 52, wherein a hole 3 is created in the ground 1 by the rotating milling wheel 64. The soil material removed during milling is mixed in situ in the hole 3 by the milling wheel 64 with a settable suspension supplied via a suspension feeder 54 to form a soil mortar 5, which flows through the frame 61 of the milling machine 60 and can thus fill and support the hole 3 in the ground 1, as shown in FIG. Figure 3 As clearly shown in .

[0051] After reaching the final depth, further homogenization of the soil slurry 5 in the hole 3 can be performed, if necessary, by moving the milling machine 60 vertically up and down in the hole 3. After the treatment is completed, the milling machine 60 is withdrawn from the hole 3. Figure 4 The soil mortar 5 in the hole 3 can solidify into a foundation element 8 .

[0052] If you can also Figure 4 As can be seen in FIG, the milling machine 60 can be guided by the guide rod 52 along the mast 35 on the carrier 32 of the device 30.

[0053] The supply device 20, which may include in particular a suspension pump 22, is used to convey a settable suspension, such as a cement suspension, from a storage tank (not shown) or a mixing and preparation device via a supply line 24 to the upper end of the guide rod 52 into a tubular suspension feeder 54. Figure 4 The vertical travel movement of the milling machine 60, the rotational movement of the milling wheel 64 and the conveying capacity of the feeding device 20 can be coordinated and controlled as required via a control device (not shown).

[0054] Combine Figure 5 and Figure 6 , another embodiment of the device 50 according to the present invention is explained, which is configured as a drilling device 70. The drilling device 70 may also preferably have a carrier device 32 with an undercarriage 30, which may in particular be configured as a crawler undercarriage. A superstructure 34 may preferably be arranged on the undercarriage 30 and may preferably be rotatably mounted about a vertical rotation axis. During operation, a substantially vertical mast 35 may be attached to the carrier 32, in particular the superstructure 34.

[0055] The drilling frame 72 can be mounted and guided along the mast 35 in a linearly displaceable manner. The soil removal device 40 can be arranged on the drilling frame 72 and, in the illustrated embodiment, is configured as a drilling device 80 having three drilling tools 82 arranged adjacent to one another. The drilling tools 82 can each have a rod-shaped design with a lower drill bit for removing soil material and an adjacent conveying and mixing auger. Other embodiments of the at least one drilling tool 82 are also possible, such as having separate conveying and mixing sections. Preferably, the three drilling tools 82 arranged adjacent to one another can be used to create an elongated borehole 3 in the ground 1.

[0056] The soil material removed by the corresponding drill bit is transported upward by the auger to the rear region of the hole 3. The drilling tool 82 can be equipped with a hollow core barrel, through which the settable suspension can flow downward to the lower region of the drilling tool 82 and out into the hole 3 via an outlet opening (not shown). The suspension is supplied from the carrier 32 to the upper end of the drilling tool 82 via a hose-like supply line 24, into the region of the drill drive 83. Further outlet openings for the suspension can also be provided along the rod-shaped drilling tool 82, so that it can be discharged in the region of the supply screw.

[0057] Thus, the removed soil material, which is at least partially transported upward by the drilling tool 82, can be mixed with the supplied settable suspension by the rotational movement of the drilling tool 82, in particular the rotational movement of the auger, to form a soil mortar 5. The soil mortar 5 produced in situ in this way can harden into the desired foundation element 8 in the produced drilled hole.

[0058] according to Figure 7 , shows a possible image 90 on the screen or a possible protocol diagram as an example. This can be displayed to the device operator on the screen of the machine and / or printed out by the control device of the device 50 when the method according to the invention is carried out. In the first left part 91 of the image 90, the depth progression of the processing tool 42 can be shown over time. In particular, from the time according to Figure 7 As can be seen from image 90, the processing tool 42 was sunk roughly evenly from the surface to a depth of about 12 meters in about 50 minutes, and then was pulled back to the surface again from the final depth in about 20 minutes.

[0059] In the subsequent second section 92, the respective depths can be used to display the amount of suspension introduced and processed into the hole 3 of this depth section. The amount of suspension introduced in each case is displayed as a bar 95 in each 0.5 meter depth section, wherein the second section 92 refers to the introduction of suspension during the lowering of the processing tool.

[0060] On the other hand, in the subsequent third section 93 , the amount of suspension incorporated in the respective depth section (also 0.5 meters in each case) when the processing tool is pulled up can be displayed as a bar 95 .

[0061] Furthermore, the total amount of suspension incorporated in each depth section during the lowering of the treatment tool 42 and during the pulling up of the treatment tool 42 can be displayed in the subsequent fourth section 94 on the right. Figure 7 In the example, the quantity scale relative to the X-axis is different in sections 92, 93 and 94, while the depth scale relative to the Y-axis may be the same in sections 91, 92, 93 and 94.

[0062] The control system can be used to ensure that the same amount of suspension is introduced in each depth section after lowering and pulling up, or to introduce a predetermined amount of suspension that varies for each depth section. The evaluation software can also generate a comparable graph of tool rotations per meter of soil depth. During execution, this comparable graph of suspension amounts and, depending on the process, tool rotations are displayed to the machine operator on the machine's operating screen.

Claims

1. A method for producing foundation elements in the ground using a soil mortar, comprising a soil removal device with at least one rotationally driven processing tool, wherein: - said at least one processing tool is moved substantially vertically relative to said ground, and ground material is removed by said at least one rotationally driven processing tool by forming a hole in said ground, - a settable suspension is supplied into the well, and - the removed soil material at least partially remains in the hole and is mixed in situ with the supplied suspension by the at least one rotationally driven processing tool to form the soil slurry, - wherein the formed soil mortar hardens into the foundation element in the ground after the at least one rotationally driven processing tool has been withdrawn from the hole, - wherein at least the vertical movement of at least one processing tool, the rotational movement of the at least one processing tool, the supply of suspension and at least one dimension of the foundation element represent method parameters, in, The method is at least partially performed automatically by a control device, wherein at least one method parameter is input into the control device as a default value, and At least one remaining method parameter is set and controlled by the control device as a function of at least one input default value.

2. The method according to claim 1, in, The method parameters include or additionally have at least one of the following parameters: the rotation speed of the processing tool, the rotation direction of the processing tool, the torque of the processing tool, the number of revolutions per depth feed of the processing tool, the vertical movement speed or vertical feed force when lowering or pulling up the processing tool, the supply rate of the suspension, the supply amount of the suspension, or a combination of the above parameters.

3. The method according to claim 1, in, The at least one rotationally driven machining tool comprises a drilling tool, which is rotationally driven about a substantially vertically oriented drilling axis, wherein the hole is produced by drilling.

4. The method according to claim 1, in, The at least one rotationally driven machining tool comprises a milling wheel which is rotationally driven about a substantially horizontally oriented milling wheel axis, wherein the bore is produced by milling.

5. The method according to claim 1, in, At least one rotationally driven processing tool has at least one removal element, by means of which soil material is removed and comminuted, and / or at least one mixing element, by means of which the removed soil material is mixed with the supplied suspension.

6. The method according to claim 1, in, The supply of the suspension into the well and the movement of the at least one rotationally driven processing tool, in particular the rotation of the at least one rotationally driven processing tool, are input as default values into the control device, and The basic vertical movement of the at least one rotationally driven processing tool is set by the control device according to an inputted default value.

7. The method according to claim 1, in, A vertical lowering of the at least one rotationally driven working tool is set by the control device, if this is not the default value, and / or a vertical raising of the at least one rotationally driven working tool is set, if this is not the default value.

8. The method according to claim 1, in, The rotation of the processing tool and / or the feed rate and / or feed amount of the suspension are set by the control device, if these are not default values.

9. The method according to claim 1, in, The control device controls a supply device, in particular a suspension pump, via which the suspension is supplied to the bore.

10. A device for producing foundation elements in the ground with soil mortar, in particular according to claim 1, comprising a soil removal device with at least one rotationally driven processing tool, wherein: The device is configured to: - moving the at least one processing tool substantially vertically relative to the ground and removing ground material by forming a hole in the ground with the aid of the at least one rotationally driven processing tool, - feeding the settable suspension into the hole by means of a feeding device, and - mixing the supplied suspension with the removed soil material in situ in the hole by means of the at least one rotationally driven processing tool to form the soil slurry, - wherein, after the at least one rotationally driven processing tool is withdrawn from the hole, the formed soil mortar hardens in the ground into the foundation element, - wherein at least the vertical movement of at least one processing tool, the rotational movement of the at least one processing tool, the supply of suspension and at least one dimension of the foundation element represent method parameters, in, providing and configuring a control device, with which the creation of the foundation element can be performed at least partially automatically, wherein at least one method parameter is input into the control device as a default value, and The basic vertical movement of the at least one rotationally driven working tool is set by the control device as a function of input default values.

11. The device according to claim 10, in, The device is configured as a drilling device, wherein the at least one rotationally driven machining tool comprises a drilling tool which is rotationally driven about a substantially vertically oriented drilling axis.

12. The device according to claim 11, in, The drilling arrangement has a plurality of drilling tools arranged adjacent to each other in parallel.

13. The device according to claim 10, in, The device is configured as a milling machine, in particular as a diaphragm wall milling machine, wherein the at least one rotationally driven machining tool comprises a milling wheel which is rotationally driven about a substantially horizontally oriented milling wheel axis.

14. The device according to claim 13, in, The milling machine has a plurality of milling wheels, in particular two pairs of milling wheels, which are arranged adjacent to each other and in parallel.

15. The device according to claim 10, in, A suspension pump is arranged for feeding suspension into the bore, wherein the suspension pump is controlled by the control device.

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