Method and device for creating a foundation element in the ground from a ground mortar

Abstract

The invention relates to a method for creating a foundation element in the ground from a soil mortar, with a soil removal device with at least one rotatingly driven processing tool, wherein the at least one processing tool is moved substantially vertically to the ground and soil material is removed by the at least one rotatingly driven processing tool to form a hole in the ground, a settable suspension is fed into the hole and the removed soil material remains at least partially in the hole and is mixed in situ by the at least one rotatingly driven processing tool with the supplied suspension to form the soil mortar, wherein the soil mortar formed hardens after the at least one rotatingly driven processing tool has been withdrawn from the hole to the foundation element in the ground, wherein at least the vertical movement of the at least one processing tool,The rotary movement of the at least one processing tool, the supply of suspension, and at least one dimensioning of the foundation element represent process parameters. According to the invention, the process is carried out automatically, at least in sections, by a control device, wherein at least one process parameter is input into the control device as a default value, and at least one remaining process parameter is set and controlled by the control device depending on the at least one input default value.

Description

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soil mortar, wherein the soil mortar formed hardens after the at least one rotatingly driven processing tool has been withdrawn from the hole to the foundation element in the ground, wherein at least the vertical movement of the at least one processing tool,the rotary movement of the at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

[0002] The invention further relates to a device for creating a foundation element in the ground from a soil mortar, comprising a soil removal device with at least one rotationally driven processing tool, wherein the device is designed to move the at least one processing tool substantially vertically to the ground and to remove soil material by means of the at least one rotationally driven processing tool, forming a hole in the ground, to feed a settable suspension into the hole by means of a feed device, and to mix the supplied suspension with removed soil material in situ in the hole by means of the at least one rotationally driven processing tool to form the soil mortar, wherein the formed soil mortar hardens in the ground after the at least one rotationally driven processing tool is withdrawn from the hole to 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 dimensioning of the foundation element represent process parameters, according to the preamble of claim 10.

[0003] Foundation elements made from soil mortar are particularly economical and ecological. Unlike conventional mortar, in which a binding agent is mixed with a liquid and an added aggregate, particularly sand or gravel, soil mortar uses the soil material directly generated during soil cultivation as the aggregate. This saves costs for extracting the aggregate and transporting it from external sources to the construction site. Using soil material directly generated during soil cultivation for the soil mortar also reduces disposal costs for removing spoil from the construction site and for landfilling excavated soil.

[0004] However, the construction of a foundation element, particularly a foundation pile or a diaphragm or cut-off wall, in the ground from soil mortar requires increased effort when forming the foundation element to ensure sufficient execution quality and avoid unnecessary excess consumption of settable suspension. Furthermore, a machine operator faces particular challenges when creating a hole in the ground in which the foundation element is created in situ from the soil mortar formed directly in the hole. In particular, sufficient speeds of the processing tool and an adapted feed rate for feeding the settable suspension must be ensured to ensure high execution quality of the foundation element from the soil mortar. These can vary depending on local conditions and the respective processing depth. This requires a high level of concentration and extensive experience on the part of the machine operator.

[0005] EP 1 452 645 B2 discloses a generic method for constructing a diaphragm wall in the ground. In this method, a diaphragm wall cutter with rotating cutting wheels is lowered into the ground, removing and crushing soil material. The removed soil material is mixed with a settable suspension within the milled slot, forming soil mortar. Before the soil mortar hardens, the diaphragm wall cutter is withdrawn from the milled slot filled with soil mortar. Furthermore, it is possible to insert support beams into the soil mortar using a crane before the soil mortar hardens.

[0006] Such a method for constructing a retaining wall in the ground using a soil mortar is also called the CSM™< method.

[0007] For example, from DE10 2004 005 967 A1, it is known to form a retaining or drilling wall in the ground from a soil mortar using a drilling and mixing auger, and in particular an arrangement of parallel drilling and mixing augers. In this process, the soil material removed during drilling is mixed with a setting liquid to form a soil mortar while still in the borehole. Such a process is known, in particular, under the name MIP™.

[0008] The invention is based on the Task The aim is to provide a method and a device with which a foundation element in the ground can be produced from a soil mortar particularly efficiently and with a high level of workmanship.

[0009] The object is achieved, 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 specified in the dependent claims.

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

[0011] A basic idea of the invention is not to leave the process for creating a foundation element in the ground from a soil mortar solely to the experience of a machine operator, but to provide a control device with which the process can be carried out partially or completely automatically. The control device is designed such that at least one default value is specified as a process parameter by the machine operator or a control center, while the remaining essential process parameters are then determined and controlled by the control device according to a control program.The control device can preferably be designed in such a way that, depending on the construction site and in particular depending on the specifications of the device operator or a control center, it can be freely set which process parameter(s) serve as a default value and which process parameters are determined and adjusted by the control device depending on this.

[0012] A control logic or a control program of the control device can be created by storing formulas or, in particular, pre-calculated tables stored in the control device. For example, if a vertical movement and / or a rotational speed of the processing tool is specified as a default value, a feed quantity of settable suspension can be controlled. Alternatively, a feed quantity or delivery rate of settable suspension can also be specified, while a suitable rotational speed and / or a suitable vertical movement of the processing tool is controlled by the control device. During a vertical movement, the control device can control a lowering, a pulling, or preferably both.

[0013] The method according to the invention allows foundation elements to be constructed from soil mortar particularly efficiently and with a high and largely consistent quality of execution. For the purposes of the invention, the term "foundation elements" is to be understood generally and includes not only foundation elements but also shoring, sealing, support, and block elements, as well as other elements that are constructed in the ground. Such foundation elements made of soil mortar can also be referred to as soil mixing elements.

[0014] Essential general process parameters for creating a foundation element from a soil mortar can be, in particular, the vertical movement of at least one processing tool, a rotational movement of at least one processing tool, the supply of suspension and at least one dimensioning of the foundation element.

[0015] According to a further development of the invention, the process parameters include or additionally include at least one of the following parameters: speed of the machining tool, direction of rotation of the machining tool, torque of the machining tool, number of rotations per depth stroke of the machining tool, vertical movement speed or vertical feed force when lowering or pulling the machining tool, suspension feed rate, suspension feed quantity, or a combination of these parameters. The parameters "speed of the machining tool, direction of rotation of the machining tool, torque of the machining tool, and number of rotations per depth stroke of the machining tool" represent, for example, concretizations of the general process parameter "rotational movement of the at least one machining tool."The parameters "vertical movement speed or vertical feed force when lowering or pulling the processing tool" are assigned to the process parameter "vertical movement." The control device can be connected to appropriate sensors for directly detecting or determining the process parameters, as well as to appropriate adjustment devices on the drilling rig, in particular to control and influence corresponding drive devices, such as a feed drive, a rotary drive, a feed pump, etc. The parameters "slurry feed rate and suspension feed quantity" refer to the general process parameter "supplying suspension." The process parameter "dimensioning of the foundation element" can relate to the diameter of the foundation element, its axial length / depth, and special outer contours, such as cylindrical, conical, or with a plate-shaped contact surface.

[0016] A further preferred embodiment of the invention consists in that the at least one rotationally driven processing tool comprises a drilling tool that is rotationally driven about a substantially vertically directed drilling axis, whereby the hole is created by drilling. The drilling axis and the direction of advance are, in particular, aligned in the same direction. The method can be carried out by a well-known earth drilling device with one or more parallel, rod-shaped processing tools designed for removal and mixing.

[0017] Alternatively, an advantageous embodiment of the invention provides that the at least one rotationally driven machining tool comprises a cutting wheel which is driven in rotation about a substantially horizontally directed cutting wheel axis, the hole being created by cutting. The horizontal cutting wheel axis and the vertical advance direction are transverse to one another. The at least one cutting wheel can be arranged in particular on a so-called trench wall cutter. Preferably, two cutting wheels are arranged as a cutting wheel pair on a common bearing plate which lies between the two cutting wheels. Further preferably, two such pairs of cutting wheels are arranged on the underside of a support frame of a trench wall cutter, so that when the trench wall cutter is lowered or sunk into the ground, an approximately rectangular cut hole is created.

[0018] The milling device can preferably be lowered into the ground via a support cable based solely on the weight of the milling device or via a guide rod, by means of which a feed force can preferably be exerted. Preferably, the settable suspension is introduced into the formed milling slot in the region of the at least one milling wheel. The rotation of the at least one milling wheel removes and crushes the soil material, and the rotational movement mixes it with the supplied suspension to form a soil mortar.

[0019] A preferred variant of the method according to the invention further comprises that at least one rotationally driven processing tool has at least one removal element, by means of which soil material is removed and crushed, and / or at least one mixing element, by means of which 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 directed drill rod or on the outer circumference of the at least one cutting wheel. The drill rod is preferably tubular, with a central feed channel for feeding the suspension. In the case of a trench wall cutter, scraper elements can also be arranged on the frame, which mesh with removal teeth on the cutting wheel circumference in order to achieve a particularly good mixing effect.

[0020] According to a further development of the invention, it is preferred that a supply of suspension into the hole and a movement of the at least one rotationally driven machining tool are entered into the control device as default values, and that, depending on the entered default values, a substantially vertical movement of the at least one rotationally driven machining tool is set by the control device. The rotation of the machining tool can relate to a rotational speed, a torque and / or a specific relationship between rotational speed and propulsion. If, for example, loose soil is present, a greater vertical movement can be set or achieved with a specific rotational movement. Conversely, if firmer soil is present, the axial propulsion must be reduced accordingly in order to maintain a desired rotational movement, in particular a set rotational speed.

[0021] A further preferred embodiment of the invention can be seen in that the control device sets a vertical lowering of the at least one rotationally driven processing tool, provided this is not a predefined value, and / or a vertical pulling of the at least one rotationally driven processing tool, provided this is not a predefined value. Depending, for example, on a predefined speed or a predefined torque, the control device can set a suitable vertical lowering of the rotationally driven processing tool. The vertical lowering can relate to a ratio between a lowering and a supplied amount of suspension. The same applies to a vertical pulling of the rotationally driven processing tool, so that a high-quality soil mortar of consistent quality can be produced when carrying out the method.

[0022] In particular, according to a further development of the method according to the invention, it is preferred that the control device adjusts a rotation of the processing tool and / or a feed rate and / or a feed quantity of suspension, provided these are not preset values. In particular, by controlling and adjusting these parameters by the control device, a particularly high and consistent mortar quality can be achieved.

[0023] To control and adjust the rotary movement of the machining tool, the control device can, in particular, control a rotary drive. Regarding the vertical movement, the control device can control a vertical drive, in particular an actuating cylinder or a cable pull mechanism for vertical movement.

[0024] With regard to controlling the amount of suspension, it is advantageous according to one embodiment of the invention that the control device controls a suspension pump, through which the suspension is fed into the hole. The suspension pump can be a positive displacement pump, in particular a peristaltic or screw pump. The control device is connected in particular to the pump drive, so that the amount of suspension to be fed can be directly adjusted depending on the movement of the processing tool.

[0025] The invention further comprises a device for creating a foundation element in the ground from a soil mortar, which is characterized in that a control device is provided and designed with which the creation of the foundation element can be carried out automatically at least in sections, wherein at least one process parameter is entered into the control device as a default value, and depending on the entered default values, a substantially vertical movement of the at least one rotationally driven processing tool is set by the control device.

[0026] The device is particularly designed to carry out the method according to the invention described above. The device can achieve the advantages described above.

[0027] In principle, the device for creating a foundation element can be designed in any suitable form. According to one embodiment of the invention, it is advantageous for the device to be designed as a drilling device in which the at least one rotationally driven processing tool comprises a drilling tool that is rotationally driven about a substantially vertically directed drilling axis. In a simple case, the drilling tool can be a continuous auger. Preferably, the drilling tool can have an removal device on its underside for removing soil material and, adjoining it upwards, further elements for conveying and / or mixing the removed soil material with suspension, such as mixing paddles.Preferably, the drilling tool may comprise a central feed channel through which 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 further development of the invention, it is particularly preferred that the drilling device comprises a plurality of drilling tools arranged parallel to one another. This allows elongated boreholes to be created in the ground in a transverse direction. The individual drilling tools can be designed and coordinated with one another such that the individual boreholes at least partially overlap, thus forming an elongated drill slot.

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

[0030] It is particularly advantageous that the cutter has several cutting wheels, in particular two pairs of cutting wheels arranged parallel to one another. In particular, with two such pairs of cutting wheels on the underside of a support frame of a milling device, a roughly rectangular milled hole can be created in the ground when the milling device is lowered vertically, extending vertically downwards into the ground. The cutter or milling device is thus designed as a so-called diaphragm wall cutter. By arranging appropriately produced milled holes in a row, a milled slot of almost any length can be created in the ground, which is then filled with soil mortar to form a diaphragm wall.

[0031] The device can be stationary or mobile. In a mobile configuration, the device has a chassis, in particular a crawler chassis. A mast, along which the processing tool can be guided vertically displaceably, can preferably be arranged on a rotatably mounted superstructure.

[0032] A preferred embodiment of the invention further comprises arranging a suspension pump for supplying suspension into the hole, the suspension pump being controlled by the control device. By means of the suspension pump, settable suspension can be supplied from a surface of the soil, for example from a preparation system or a reservoir, to the processing tool in the soil. The control device can, in particular, control both a rotating drive for the processing tool and a drive of the suspension pump in a coordinated manner, so that a demand-based supply of settable suspension into the hole for producing soil mortar is always ensured. In principle, the control device can also be connected to a preparation system for preparing the suspension, which is connected upstream of the suspension pump.Thus, the control device can control the device for creating a foundation element, the suspension pump and the preparation system in a coordinated manner so that the preparation and supply of suspension into the ground according to demand and / or capacity is achieved for the efficient creation of a foundation element.

[0033] To clarify the invention and the method according to the invention, the following preferred embodiments are given when constructing a foundation pile from a soil mortar.

[0034] To create the foundation element and to form the necessary soil mortar, a suspension quantity of 980 l / m (liters per meter) of the foundation element is specified as a default value. Another process parameter is an advance or extraction speed of the soil working tool, in particular a drilling tool, of a maximum of 0.5 m / min (meters per minute). Furthermore, a maximum delivery rate of a suspension pump of 525 l / min (liters per minute) is specified as a process parameter. To ensure the 980 l / m of suspension quantity to be installed in the foundation element, the control device sets the feed rate to 0.43 m / min so that the maximum advance speed is not exhausted but the maximum delivery rate of the suspension pump is used and the specified suspension quantity per meter is ensured.

[0035] However, if in a further embodiment the amount of suspension to be installed is only 450 l / m of the foundation element, a theoretically conceivable advance speed of 0.94 m / min would result with a maximum pump output of 425 l / min, but the control device sets the advance or feed to 0.5 m / min according to the specified value of the maximum advance speed of 0.5 m / min for the existing device, i.e. the maximum possible feed rate for the device, while the feed rate is adjusted accordingly so that the target quantity is achieved.

[0036] The invention will be further explained below with reference to preferred embodiments, which are schematically illustrated in the drawings. In the drawings: Fig. 1A perspective view of a first embodiment of a device according to the invention, which is designed as a milling device; Fig. 2an enlarged detailed view of the milling cutter of the device of Fig. 1 in partially sectioned side view; Fig. 3 a schematic representation of the production of a foundation element in the ground with the milling machine of Fig. 2 ; Fig. 4 a schematic side view of the device of Fig. 1 when creating a foundation element in the ground; Fig. 5 a side view of another device according to the invention, which is designed as a drilling device; Fig. 6 an enlarged front view of the drilling tools, which in the device of Fig. 5 are used; and Fig. 7 is a schematic screen representation of a control device for the invention.

[0037] A device 30 according to the invention for creating a foundation element in the ground, which is specifically designed as a trench cutter 50, is shown in Fig. 1 shown. The device 30 can preferably have a carrier device 32 with a chassis 33, which can in particular be designed as a crawler chassis. A superstructure 34 can preferably be arranged on the chassis 30, which can preferably be mounted for rotation about a vertical axis of rotation. A mast 35, which is essentially vertical during operation, can be attached to the carrier device 32, in particular the superstructure 34.

[0038] In the device 30 designed as a trench wall cutter 50, a cutter 60 with a guide rod 52 is displaceably arranged along the mast 35 as a soil removal device 40. This processing device 40 can have cutting wheels 64 as a processing tool 42 for removing soil material, as will be described in more detail below in connection with Fig. 2is explained.

[0039] The milling machine 60 according to Fig. 2 has a compact frame 61, which, in terms of its cross-sectional dimensions, is smaller than the cross-section of the milling hole created by the milling cutter 60. Attached to the underside of the frame 61 are two adjacent plate-shaped bearing plates 62, on the side surfaces of which milling wheels 64 are mounted.

[0040] The cutting wheels 64 on a bearing plate 62 are each coaxial with each other, so that a pair of cutting wheels is formed on each bearing plate 62. Removal elements for removal, in particular for milling soil material, are formed along the outer circumference of each cutting wheel 64 in a generally known manner. The cutting wheels 64 are each driven in pairs via an associated drive 63, with the two provided drives 63 preferably being arranged in the housing-like frame 61 of the milling machine 60.

[0041] The frame 61 is attached to a guide rod 52, in which a suspension feed 54 runs for supplying a settable suspension. The tubular suspension feed 54 opens below the frame 61 between the two pairs of milling wheels 64. During milling operation, the soil material removed by the milling wheels 64 can thus be mixed directly in the area of the milling wheels with the settable suspension flowing out of the suspension feed 54 due to the movement of the milling wheels, and a soil mortar can be formed in situ. The radially projecting removal elements 66 can also directly serve as mixing elements for mixing the milling cuttings with the suspension. Additional paddle-like mixing elements can preferably also be arranged on the milling wheels 64.

[0042] Mixing can also be assisted by plate-like scrapers 68, which are mounted on the underside of the frame 61 and can extend into the area of the row-like abrasion elements 66 for scraping off adhering soil material. The rotary movement of the milling wheels 64 and the arrangement of the scrapers 68 can, in particular, assist in conveying the mixture of the milling cuttings and the suspension upwards past the frame 61 into a rear area of the milling slot.

[0043] The process and method for forming a foundation element 8 in the soil 1 is shown schematically in the Figures 3 and 4further clarified. The milling machine 60 with the rotating milling wheels 64 is sunk essentially vertically into the ground 1 via the guide rod 52, whereby a hole 3 is created in the ground 1 by the rotating milling wheels 64. The soil material removed during milling is mixed with the settable suspension supplied via the suspension feed 54 in situ in the hole 3 by the milling wheels 64 to form a soil mortar 5, which flows past the frame 61 of the milling machine 60 and can thus fill and support the hole 3 in the ground 1, as clearly shown in Fig. 3 is clarified.

[0044] After reaching a final depth, if necessary, further homogenization of the soil mortar 5 in hole 3 can be carried out by further vertical up and down movement of the milling machine 60 in hole 3. After completion of the processing, the milling machine 60 is withdrawn from hole 3, as shown in Fig. 4 shown. The soil mortar 5 in hole 3 can set to form the foundation element 8.

[0045] What next Fig. 4 As can be seen, the milling cutter 60 can be guided with the guide rod 52 along the mast 35 on the carrier device 32 of the device 30.

[0046] Via a feed device 20, which may in particular comprise a suspension pump 22, a partially Fig. 4 The feed line 24 shown conveys settable suspension, such as a cement suspension, from a reservoir (not shown) or a mixing and preparation system to the upper end of the guide rod 52 into the tubular suspension feed 54. A control device (not shown) can be used to coordinate a vertical movement of the milling cutter 60, a rotational movement of the milling wheels 64, and a conveying capacity of the feed device 20 and control it as needed.

[0047] In connection with the Figures 5 and 6A further embodiment of the device 50 according to the invention is explained, which is designed as a drilling rig 70. The drilling rig 70 can also preferably have a carrier 32 with a chassis 30, which can in particular be designed as a crawler chassis. A superstructure 34 can preferably be arranged on the chassis 30, which can preferably be mounted for rotation about a vertical axis of rotation. A mast 35, which is essentially vertical during operation, can be attached to the carrier 32, in particular the superstructure 34.

[0048] A drilling carriage 72 can be mounted and guided for linear displacement along the mast 35. A soil removal device 40 can be arranged on the drilling carriage 72, which in the illustrated embodiment is designed, for example, as a drilling device 80 with three drilling tools 82 arranged next to one another. The drilling tools 82 can each be rod-shaped with a lower drill head for removing soil material and an adjoining conveying and mixing auger. Other configurations of the at least one drilling tool 82 are possible, for example with separate conveying and mixing segments. An elongated borehole 3 can be created in the ground 1 by means of the preferably three drilling tools 82 arranged next to one another.

[0049] The soil material removed by the respective drill heads is conveyed upwards by the conveyor screws into a rear area of the hole 3. The drilling tools 82 can be designed with a hollow core tube through which settable suspension can flow into a lower area of the drilling tools 82 and out into the hole 3 via outlet openings (not shown). The suspension is fed via a hose-like supply line 24 from the carrier device 32 to the upper end of the drilling tools 82 in the area of the drill drives 83. Additional outlet openings for the suspension to exit in the area of the conveyor screws can also be formed along the rod-shaped drilling tools 82.

[0050] The removed soil material, which is at least partially conveyed upwards by the drilling tools 82, can thus be mixed with the supplied settable suspension to form the soil mortar 5 by the rotational movement of the drilling tools 82 and in particular of the conveyor screws. The soil mortar 5 thus produced in situ can harden in the created borehole to form a desired foundation element 8.

[0051] According to Fig. 7 A possible display 90 on a screen or a possible protocol graph is shown as an example. This can be displayed and / or printed out to a device operator on a screen of the machine by the control device of the device 50 when carrying out the method according to the invention. In a left-hand first section 91 of the display 90, a depth profile of the machining tool 42 over time can be shown. The display 90 according to Fig. 7It can be seen specifically that the processing tool 42 is sunk largely evenly from the surface to a depth of approximately 12 metres within approximately 50 minutes and is then withdrawn from the final depth to the surface in the following approximately 20 minutes.

[0052] In the subsequent second section 92, the respective depth can be used to indicate which amount of suspension has been introduced and incorporated into hole 3 at which depth. The amount of suspension incorporated in each case is displayed as a bar 95 in depth sections of 0.5 meters each, with the second section 92 relating to the introduction of suspension during the sinking of the processing tool.

[0053] In contrast, in the subsequent third section 93, the amount of suspension incorporated in each depth section, which is also 0.5 meters in each case, when pulling the processing tool can be displayed as a bar 95.

[0054] Furthermore, the subsequent right-hand fourth section 94 can show the total amount of suspension incorporated over each depth section during sinking and during the extraction of the processing tool 42. It should be noted that in the Fig. 7 the quantity scale with respect to the X-axis is different in sections 92, 93 and 94, while the depth sections with respect to the Y-axis may be the same in sections 91, 92, 93 and 94.

[0055] The control system can be used to ensure that the same amount of suspension is introduced into each depth section after sinking and extraction, or a predetermined amount of suspension that varies for each depth section. Using the evaluation software, comparable graphs can also be generated for the tool revolutions performed per meter of element depth. During operation, the operator is shown comparable diagrams for the amount of suspension and—depending on the method—also the tool revolutions on the machine's work screen.

Claims

1. A method for constructing a foundation element (8) in the ground (1) from a soil mortar (5), comprising a soil removal device (40) with at least one rotationally driven processing tool (42), wherein - the at least one processing tool (42) is moved substantially vertically to the ground (1) and soil material is removed by the at least one rotationally driven processing tool (42) to form a hole (3) in the ground (1), - a settable suspension is fed into the hole (3), and - the removed soil material remains at least partially in the hole (3) and is mixed in situ by the at least one rotationally driven processing tool (42) with the supplied suspension to form the soil mortar (5), - the formed soil mortar (5) hardens after the at least one rotationally driven processing tool (42) is withdrawn from the hole (3) to the foundation element (8) in the ground (1),- wherein at least the vertical movement of the at least one processing tool (42), the rotational movement of the at least one processing tool (42), the supply of suspension and at least one dimensioning of the foundation element (8) represent process parameters, , characterized by that the method is carried out automatically at least in sections by a control device, wherein at least one method parameter is entered into the control device as a default value, and that Depending on the at least one input default value, at least one remaining process parameter is set and controlled by the control device.

2. Method according to claim 1, characterized by thatthe process parameters comprise or additionally have at least one of the following parameters: rotational speed of the processing tool (42), direction of rotation of the processing tool (42), torque of the processing tool (42), number of rotations per depth feed of the processing tool (42), vertical movement speed or vertical feed force when lowering or pulling the processing tool (42), feed rate of suspension, feed quantity of suspension, or a combination thereof.

3. Method according to claim 1 or 2, characterized by that the at least one rotationally driven machining tool (42) comprises a drilling tool (82) which is rotationally driven about a substantially vertically directed drilling axis, wherein the hole (3) is created by drilling.

4. Method according to claim 1 or 2, characterized by thatthe at least one rotationally driven machining tool (42) comprises a milling wheel (64) which is driven in rotation about a substantially horizontally directed milling wheel axis, wherein the hole (3) is created by milling.

5. Method according to one of claims 1 to 4, characterized by that at least one rotationally driven processing tool (42) has at least one removal element (66) by which soil material is removed and comminuted, and / or at least one mixing element by which removed soil material is mixed with the supplied suspension.

6. Method according to one of claims 1 to 5, characterized by thata supply of suspension into the hole (3) and a movement of the at least one rotationally driven machining tool (42), in particular a rotation of the at least one rotationally driven machining tool (42), are entered into the control device as default values, and that a substantially vertical movement of the at least one rotationally driven machining tool (42) is set by the control device depending on the entered default values.

7. Method according to one of claims 1 to 6, characterized by that a vertical lowering of the at least one rotationally driven machining tool (42) is set by the control device, provided this is not a default value, and / or a vertical pulling of the at least one rotationally driven machining tool (42) is set, provided this is not a default value.

8. Method according to one of claims 1 to 7, characterized by that a rotation of the processing tool (42) and / or a feed rate and / or a feed quantity of suspension is set by the control device, provided that these are not default values.

9. Method according to one of claims 1 to 8, characterized by that the control device controls the feed device (20), in particular a suspension pump (22), through which suspension is fed into the hole (3).

10. A device for constructing a foundation element in the ground (1) from a soil mortar (5), in particular according to one of claims 1 to 9, comprising a soil removal device (40) with at least one rotationally driven processing tool (42), wherein the device (30) is designed to - move the at least one processing tool (42) substantially vertically to the ground (1) and to remove soil material by means of the at least one rotationally driven processing tool (42) while forming a hole (3) in the ground (1), - supply a settable suspension into the hole (3) by means of a supply device (20), and - mix the supplied suspension with removed soil material in situ in the hole (3) by means of the at least one rotationally driven processing tool (42) to form the soil mortar (5),- wherein the soil mortar (5) formed hardens after the retraction of the at least one rotationally driven processing tool (42) from the hole (3) to the foundation element (8) in the ground (1), - wherein at least the vertical movement of the at least one processing tool (42), the rotational movement of the at least one processing tool (42), the supply of suspension and at least one dimensioning of the foundation element (8) represent process parameters, , characterized by that a control device is provided and designed with which the creation of the foundation element (8) can be carried out automatically at least in sections, wherein at least one process parameter is entered into the control device as a default value, and a substantially vertical movement of the at least one rotationally driven processing tool (42) is set by the control device depending on the entered default values.

11. Device according to claim 10, characterized by that the device (30) is designed as a drilling device (70), in which the at least one rotationally driven machining tool (42) comprises a drilling tool (82) which is rotationally driven about a substantially vertically directed drilling axis.

12. Device according to claim 11, characterized by that the drilling device (70) has a plurality of drilling tools (82) which are arranged parallel to one another.

13. Device according to claim 10, characterized by that the device (30) is designed as a milling machine, in particular a trench wall milling machine (50), in which the at least one rotationally driven processing tool (42) has a milling wheel (64) which is rotationally driven about a substantially horizontally directed milling wheel axis.

14. Device according to claim 13, characterized by thatthe milling machine has a plurality of milling wheels (64), in particular two pairs of milling wheels, which are arranged parallel to one another.

15. Device according to one of claims 10 to 14, characterized by that a suspension pump (22) is arranged for supplying suspension into the hole (3), wherein the suspension pump (22) is controlled by the control device.

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