Method and device for producing foundation element in ground from soil mortar

Abstract

To provide a method and a device capable of particularly efficiently producing, with high quality finishing, a foundation element in the ground from a soil mortar.SOLUTION: A soil substance is removed by forming a hole in the ground by at least one rotationally driven processing tool, a curable suspension liquid is fed into the hole, the removed soil substance partially remains in the hole and is mixed with the suspension liquid fed by at least the one rotationally driven processing tool immediately to form a soil mortar, after the at least the one rotationally driven processing tool is extracted from the hole, the formed soil mortar is cured into a foundation element in the ground, and vertical movement of at least the one processing tool, rotary movement of at least the at least one processing tool, the supply of the suspension liquid and at least one dimension of the foundation element indicate method parameters.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a method for creating a foundation element in the ground from an earth mortar, the method comprising an earth removal device with at least one rotary driven processing tool, wherein the at least one processing tool is moved in a substantially vertical direction relative to the ground, and earth material is removed by forming a hole in the ground with the at least one rotary driven processing tool, a hardening suspension is fed into the hole, the removed earth material remains at least partially in the hole and is mixed in situ with the fed suspension by the at least one rotary driven processing tool to form an earth mortar, the formed earth mortar hardens in the soil into a foundation element after the at least one rotary driven processing tool is withdrawn from the hole, and wherein at least the vertical movement of the at least one processing tool, the rotational movement of the at least one processing tool, the feeding of the suspension and the at least one dimensioning of the foundation element represent method parameters.

[0002] The present invention also relates to an apparatus for preparing a foundation element in the ground from an earth mortar, the apparatus comprising an earth removal device with at least one rotary driven processing tool, wherein the apparatus is configured to move the at least one processing tool in a substantially vertical direction relative to the ground, remove earth material by forming a hole in the ground by the at least one rotary driven processing tool, feed a hardening suspension into the hole by a feeding device, and mix the fed suspension with the removed earth material in situ in the hole by the at least one rotary driven processing tool to form an earth mortar, the formed earth mortar hardening in the soil after withdrawing the at least one rotary driven processing tool from the hole to the foundation element, and wherein at least the vertical movement of the at least one processing tool, the rotational movement of the at least one processing tool, the feeding of the suspension, and the at least one dimensioning of the foundation element represent method parameters. [Background technology]

[0003] Foundation elements made of earth mortar are particularly economical and environmentally friendly. Whereas in conventional mortars, a binder is mixed with a liquid and supplied aggregate, in particular sand or gravel, the aggregate used in earth mortars is earth material produced directly during soil processing. This saves costs for aggregate extraction and transport from the outside to the construction site. By using earth material produced directly during soil work in earth mortars, the disposal costs for removing the excavated material from the construction site and for discarding the removed earth material are also correspondingly reduced.

[0004] However, fabricating foundation elements, especially foundation piles, diaphragm walls, or sealing walls, from soil mortar into the ground requires significant effort to ensure sufficient construction quality and avoid unnecessary additional consumption of hardening suspension when forming the foundation elements. Additionally, drilling holes in the ground and fabricating the foundation elements in situ from soil mortar formed directly in the holes is particularly challenging for machine operators. In particular, a sufficient rotation speed of the processing tool and an appropriate feed rate for supplying the hardening suspension must be ensured to achieve high-quality finishing of the foundation elements from the soil mortar. These may vary depending on the local conditions and even the respective working depth. This requires high concentration and extensive experience on the part of the machine operator.

[0005] Patent Document 1 describes a general method for constructing a diaphragm wall in the ground, in which a diaphragm wall milling machine equipped with a rotary-driven milling wheel is lowered into the ground to remove and pulverize soil material. The removed soil material is mixed with a hardening suspension inside the milling trench to form soil mortar. Before the soil mortar hardens, the diaphragm wall milling machine is withdrawn from the milling trench filled with the soil mortar. Before the soil mortar hardens, a support beam can be inserted into the soil mortar using a crane.

[0006] This method of building a retaining wall on the ground from soil mortar is also called the CSM (trademark) method.

[0007] It is known, for example from US Pat. No. 5,649,669, to form support or excavation walls in a similar manner from soil mortar in the ground using excavating and mixing augers, in particular an arrangement of adjacent parallel excavating and mixing augers, in which the soil material removed during excavation is mixed with a hardening liquid in the borehole to form soil mortar. Such a method is known in particular under the name MIP™. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] European Patent No. 1452645 (B2) [Patent Document 2] German Patent No. 102004005967 (A1) Summary of the Invention [Problem to be solved by the invention]

[0009] The present invention addresses the problem of identifying a method and an apparatus by which foundation elements can be manufactured from soil mortar on the ground particularly efficiently and with a high quality finish. [Means for solving the problem]

[0010] 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 set out in the dependent claims.

[0011] The method according to the invention is characterized in that the method is at least partly performed automatically by means of a control device, at least one method parameter being entered into the control device as a default value, and at least one remaining method parameter being set and controlled by the control device in accordance with the entered at least one default value.

[0012] The basic idea of the present invention is to provide a control device that can execute a method for producing foundation elements on the ground from soil mortar partially or fully automatically, rather than leaving the method to the experience of the machine operator alone. For this purpose, the control device is configured so that at least one default value is specified as a method parameter by the machine operator or a control center, while the remaining important method parameters are determined and controlled by the control device according to a control program. It may be preferable to configure the control device so that it is possible to freely set, depending on the specifications of the construction site, in particular the machine operator or the control center, which method parameter or parameters serve as default value(s) and which method parameters are determined and readjusted by the control device accordingly.

[0013] The control logic or control program of the control device can be formed by storing formulas or, in particular, by pre-calculated tables stored in the control device. For example, if the vertical movement and / or rotation speed of the machining tool are specified as default values, the feed rate of the hardenable suspension can be controlled. Alternatively, the feed rate or feed rate of the hardenable suspension can also be specified, while the appropriate rotation speed and / or appropriate vertical movement of the machining tool can be controlled by the control device. In the case of vertical movement, the control device can control the lowering, the pulling, or preferably both.

[0014] By using the method according to the invention, foundation elements can be produced from soil mortar particularly efficiently and with a high and generally consistent construction quality. Here, in the context of the present invention, the term "foundation element" is generally understood and includes not only foundation elements but also sheeting, sealing, supports, block parts and other parts produced in the ground. Such foundation elements made from soil mortar may also be called soil mixing elements.

[0015] Important general method parameters for preparing 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 the suspension, and the dimensioning of at least one of the foundation elements.

[0016] According to a development of the invention, the method parameters are defined to include or additionally comprise at least one of the following parameters: the rotational speed of the machining tool, the rotational direction of the machining tool, the torque of the machining tool, the number of revolutions per depth stroke of the machining tool, the vertical movement speed or vertical feed force when lowering or withdrawing the machining tool, the feed rate of the suspension, or a combination of these parameters. The parameters "rotational speed of the machining tool, the rotational direction of the machining tool, the torque of the machining tool, and the number of revolutions per depth stroke of the machining tool" represent, for example, details of the general retained method parameter "rotational movement of at least one machining tool." The parameter "vertical movement speed or vertical feed force when lowering or withdrawing the machining tool" is assigned to the method parameter "vertical movement." To this end, the control device is connected to corresponding sensors for directly detecting or determining the method parameters and to corresponding regulating devices on the drilling equipment, and can in particular activate and influence corresponding drives, such as feed drives, rotary drives, feed pumps, etc. The parameters "Suspension feed rate and suspension feed amount" refer to the general method parameter "Suspension feed". The method parameter "Base element dimensioning" can relate to the diameter of the base element, its axial length / depth, the specific geometry, e.g. cylindrical, conical or disk-shaped contact surface.

[0017] A further preferred embodiment of the present invention is characterized in that the at least one rotary driven processing tool comprises a drilling tool that is rotationally driven about a substantially vertically oriented drilling axis, and the hole is formed by drilling. In particular, the drilling axis and the advance direction are in the same direction. Here, the method can be carried out using a well-known hole drilling rig, which comprises one or more rod-shaped processing tools arranged adjacent to each other in parallel and configured for removal and mixing.

[0018] Alternatively, an advantageous configuration of the present invention resides in that the at least one rotary-driven machining tool includes a milling wheel that is driven to rotate about a substantially horizontally oriented milling wheel axis, and the hole is formed by milling. The horizontal milling wheel axis and the vertical advance direction are perpendicular to each other. In particular, the at least one milling wheel can be arranged on a so-called diaphragm wall milling machine. Preferably, two milling wheels are arranged as a pair of milling wheels on a common end shield, with the common end shield located between the two milling wheels. More preferably, such a pair of two milling wheels is arranged below the support frame of the diaphragm wall milling machine, so that a substantially rectangular milling hole is formed when the diaphragm wall milling machine is lowered or sunk into the ground.

[0019] The milling device can be preferably lowered into the ground via a suspension cable based solely on the weight of the milling device or via a guide rod, which allows a suitable feeding force to be applied. Preferably, the hardenable suspension is introduced into a milling groove formed in the area of at least one milling wheel. By rotating the at least one milling wheel, any soil material present is removed and crushed and mixed with the supplied suspension to form a soil mortar.

[0020] A preferred variant of the method according to the invention also lies in that the at least one rotary-driven machining tool has at least one removal element for removing and pulverizing the earthen material and / or at least one mixing element for mixing the removed earthen material with the supplied suspension. The at least one additional mixing element may be a mixing paddle or a mixing blade on a vertically oriented drill rod or on the periphery of at least one milling wheel. The drill rod is preferably tubular, and a central feed channel is formed for feeding the suspension. In the case of a diaphragm wall milling machine, scraper elements may also be arranged on the frame, which mesh with removal teeth on the periphery of the milling wheel to achieve a particularly good mixing effect.

[0021] According to a development of the invention, the supply of suspension into the hole and the movement of the at least one rotary-driven machining tool are preferably input into the control device as default values, and the substantially vertical movement of the at least one rotary-driven machining tool is set by the control device according to the input default values. The rotation of the machining tool can be related to a rotation speed, a torque, and / or a specific ratio between rotation speed and thrust force. For example, if the ground is loose, a larger vertical movement can be set or achieved with a specific rotation movement. Conversely, if the ground is harder, the axial advance must be reduced accordingly to maintain the desired rotation movement, in particular the set rotation speed.

[0022] A further preferred embodiment of the present invention can be seen in the fact that the vertical drop of at least one rotary drive machining tool is set by the control device if this is not a default value, and / or the vertical withdrawal of at least one rotary drive machining tool is set if this is not a default value. For example, depending on a predetermined rotation speed or a predetermined torque, the control device can set an appropriate vertical drop of the rotary drive machining tool. The vertical drop can refer to the ratio between the drop and the amount of suspension supplied. The same applies to the vertical withdrawal of the rotary drive machining tool, so that a qualitatively consistent, high-quality soil mortar can be produced when performing this method.

[0023] In particular, according to a development of the method of the invention, the rotation of the processing tool and / or the feed rate and / or amount of suspension are preferably set by the control device if they 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.

[0024] For controlling and setting the rotational movement of the machining tool, the rotational drive may in particular be controlled by the control device. With regard to the vertical movement, the vertical drive, in particular the actuating cylinder or cable pulling mechanism for the vertical movement, may be controlled by the control device.

[0025] With regard to the control of the suspension amount, it is advantageous according to one embodiment of the present invention for the control of the suspension pump, via which the suspension is fed into the bore, to be controlled by the control device. Here, the suspension pump can be a positive displacement pump, in particular a peristaltic pump or a screw pump. In particular, the control device is connected at its end to the pump drive, so that the amount of suspension fed can be adjusted directly depending on the movement of the machining tool.

[0026] The present invention further includes an apparatus for forming a foundation element on a ground from soil mortar, the apparatus being configured with a control device so that the formation of the foundation element can be carried out at least partly automatically, characterized in that at least one method parameter is input into the control device as a default value and the substantially vertical movement of at least one rotary-driven machining tool is set by the control device in accordance with the input default value.

[0027] This device is in particular adapted to carry out the method according to the invention as previously described, with the aid of which the above-mentioned advantages can be realised.

[0028] In principle, the apparatus for preparing foundation elements can be configured in any suitable form. According to one embodiment of the present invention, the apparatus is configured as a drilling apparatus, and advantageously, the at least one rotary-driven processing tool comprises a drilling tool driven in rotation about a substantially vertically oriented drilling axis. In a simple case, the drilling tool may be a continuous drilling auger. Preferably, the drilling tool may have on its underside a removal device for removing earthen material, followed by further elements, for example a mixing paddle for conveying and / or mixing the removed earthen material with a suspension. Preferably, the drilling tool may comprise a central feed channel through which the suspension is fed from above and introduced into the surrounding boreholes via at least one lower outlet opening and / or at least one lateral outlet opening along the central drill string.

[0029] According to a development of the invention, it is particularly preferred that the drilling rig comprises a plurality of drilling tools arranged adjacent to each other in parallel. In this way, elongated boreholes can be formed laterally in the ground. The individual drilling tools can be configured and adapted to one another such that the individual boreholes at least partially overlap to form an elongated trench.

[0030] Alternatively, according to one embodiment variant of the device according to the invention, the device is configured as a milling machine, in particular a diaphragm wall milling machine, and the at least one rotary-driven processing tool preferably has a milling wheel that is driven in rotation about a substantially horizontally oriented milling axis. Milling teeth, and preferably also mixing elements, are arranged on the outer periphery of the milling wheel hub, so that earth material can be removed by the milling wheel and mixed with a supplied hardening suspension to form an earth mortar. The suspension is preferably delivered near the at least one milling wheel.

[0031] In this case, it is particularly advantageous if the milling machine has a plurality of milling wheels, in particular a pair of two milling wheels arranged adjacent to each other in parallel. In particular, by using such a pair of two milling wheels on the underside of the support frame of the milling device, a roughly rectangular milling hole can be formed in the ground when the milling device is lowered vertically, with the milling hole extending vertically downwards into the ground. The milling machine or milling device is thus configured as a so-called diaphragm wall milling machine. By lining up the correspondingly created milling holes, a milling trench of almost any length can be formed in the ground, which trench is filled with soil mortar to form a diaphragm wall.

[0032] The device can be configured as stationary or mobile. In a mobile embodiment, the device has a chassis, in particular a crawler chassis. Preferably, the mast can be arranged on a rotatably mounted superstructure, along which the processing tool can be guided so as to be vertically displaceable.

[0033] A preferred embodiment of the present invention further features that a suspension pump is arranged for feeding the suspension into the hole, the suspension pump being controlled by the control device. By means of the suspension pump, the hardenable suspension can be fed from the ground surface, for example from a preparation plant or reservoir, to the ground processing tool. In particular, the control device can coordinately control both the rotary drive for the processing tool and the drive for the suspension pump, so that an on-demand supply of hardenable suspension into the hole for producing the soil mortar is always guaranteed. 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 can coordinately control the device for producing the foundation elements, the suspension pump, and the preparation system as a whole, so that demand- and / or capacity-oriented preparation and feeding of the suspension into the ground are achieved for efficient production of the foundation elements.

[0034] To illustrate the invention and the method according to the invention, the following preferred exemplary embodiment is referred to in the case of making foundation piles from soil mortar.

[0035] A suspension volume of 980 l / m (liters per meter) for the foundation elements to be installed is specified as the default value for creating the foundation elements and forming the required soil mortar. Another specified method parameter is a maximum advance or extraction speed of the soil processing tools, in particular the excavation tools, of 0.5 m / min (meters per minute). Another suggested method parameter is a maximum delivery speed of the suspension pump of 525 l / min (liters per minute). To ensure a suspension volume of 980 l / m for the foundation elements to be installed, the feed speed is set by the control device to 0.43 m / min, so that the maximum delivery speed of the suspension pump is used and the specified suspension volume per meter is ensured without reaching the maximum advance speed limit.

[0036] On the other hand, in another exemplary embodiment, if the suspension volume of the foundation element to be installed is only 450 l / m, the maximum pump delivery rate of 425 l / min will result in a theoretically possible forward speed of 0.94 m / min, but the control device will set the forward speed or feed rate to 0.5 m / min according to the default value of the maximum forward speed of 0.5 m / min for the existing device, i.e. the maximum possible forward speed of the device, and the delivery rate will be adjusted accordingly so that the target volume is achieved. [Brief explanation of the drawings]

[0037] The invention will be further explained below with reference to preferred exemplary embodiments illustrated diagrammatically in the drawings, in which: [Figure 1] 1 is a perspective view of a first embodiment of the device according to the invention, configured as a milling device; [Figure 2] 2 is an enlarged detail view, partially in section, of a side view of the milling machine of the apparatus of FIG. 1; [Figure 3] FIG. 3 is a schematic diagram showing how foundation elements are created on the ground using the milling machine shown in FIG. 2. [Figure 4]2 is a schematic side view of the apparatus of FIG. 1 during the preparation of a foundation element in the ground. [Figure 5] 3 is a side view of a further device according to the invention, configured as a drilling device. [Figure 6] 6 is an enlarged front view of a drilling tool used in the apparatus shown in FIG. 5. [Figure 7] 1 is a schematic screen display of a control device of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0038] An apparatus 30 according to the invention for preparing foundation elements in the ground is particularly configured as a diaphragm wall milling machine 50 and is shown in Figure 1. The apparatus 30 may preferably have a carrier 32 with a chassis 33, which may in particular be configured as a crawler chassis. Desirably, a superstructure 34 may be arranged on the chassis 33 and suitably mounted so as to be rotatable about a vertical axis of rotation. A substantially vertical mast 35 may be attached to the carrier 32, in particular to the superstructure 34, during operation.

[0039] In the apparatus 30 configured as a diaphragm wall milling machine 50, a milling machine 60 with a guide rod 52 is displaceably arranged along the mast 35 as an earth removal device 40. This processing device 40 can have a milling wheel 64 as a processing tool 42 for removing earth material, which will be described in more detail below in connection with FIG.

[0040] The milling machine 60 of Fig. 2 has a small frame 61, the cross-sectional dimensions of which are smaller than the cross-section of the milled hole created by the milling machine 60. Two plate-shaped end shields 62 are attached adjacent to each other on the underside of the frame 61, and milling wheels 64 are attached to each side.

[0041] The milling wheels 64 on the end shields 62 are respectively coaxial with one another, and a pair of milling wheels is formed on each end shield 62. Along the periphery of each milling wheel 64, removal elements are arranged in a manner known per se to remove, in particular scrape away, earth material. The milling wheels 64 are each driven in pairs via associated drives 63, and two drives 63 are preferably provided arranged on a housing-like frame 61 of the milling machine 60.

[0042] The frame 61 is attached to a guide rod 52, onto which a suspension feeder 54 extends for delivering the hardenable suspension. The tubular suspension feeder 54 opens below the frame 61 between a pair of two milling wheels 64. Thus, during the milling operation, the soil material removed by the milling wheels 64 can be directly mixed in the area of the milling wheels with the hardenable suspension that flows out of the suspension feeder 54 due to the movement of the milling wheels, so that a soil mortar can be formed in situ. The radially protruding removal elements 66 can also function directly as mixing elements for mixing the milling cuttings with the suspension. Preferably, an additional paddle-shaped mixing element can also be arranged on the milling wheels 64.

[0043] The mixing may also be supported by a plate-like scraper 68, which is attached to the underside of the frame 61 and which can reach into the area of the row of removal elements 66 to scrape away adhering soil material. The rotational movement of the milling wheel 64 and the positioning of the scraper 68 may particularly help to transport the mixture of milling cuttings and suspension upwards over the frame 61 to the rear region of the milling groove.

[0044] The process and method for forming foundation elements 8 in the ground 1 is further illustrated schematically in Figures 3 and 4. A milling machine 60 with a rotary driven milling wheel 64 is lowered substantially vertically into the ground 1 via guide rods 52, and holes 3 are formed in the ground 1 by the rotating milling wheel 64. The earth material removed during milling is mixed in situ in the holes 3 by the milling wheel 64 with a hardening suspension supplied via a suspension feeder 54 to form an earth mortar 5 which flows through a frame 61 of the milling machine 60 and is thus able to fill and support the holes 3 in the ground 1, as is clearly shown in Figure 3.

[0045] After reaching the final depth, further homogenization of the soil mortar 5 in the hole 3 can be carried out, if necessary, by moving the milling machine 60 vertically up and down in the hole 3. After the process is completed, the milling machine 60 is withdrawn from the hole 3, as shown in Figure 4. The soil mortar 5 in the hole 3 can be placed on the foundation element 8.

[0046] As can be seen in FIG. 4, the milling machine 60 can be guided by a guide rod 52 along the mast 35 on the carrier 32 of the apparatus 30 .

[0047] The feeding device 20 may include, inter alia, a suspension pump 22, which is used to convey a setting suspension, such as a cement suspension, from a reservoir (not shown) or a mixing and preparation plant to the upper end of the guide rod 52 and into a tubular suspension feeder 54 via a feed line 24, which is only partially shown in Figure 4. The vertical movement of the milling machine 60, the rotational movement of the milling wheel 64 and the conveying capacity of the feeding device 20 may be adjusted and controlled as required via a control device (not shown).

[0048] 5 and 6, a further embodiment of the device 50 according to the invention will be described, configured as a drilling device 70. The drilling device 70 also preferably comprises a carrier device 32 with a chassis 33, which may in particular be configured as a crawler chassis. A superstructure 34 may suitably be arranged on the chassis 33 and may suitably be mounted rotatably about a vertical axis of rotation. A substantially vertical mast 35 may be attached to the carrier 32, in particular to the superstructure 34, during operation.

[0049] The drilling carriage 72 may be mounted and guided in a linearly displaceable manner along the mast 35. The earth removal device 40 may be arranged on the drilling carriage 72 and, in the illustrated embodiment, is configured as a drilling rig 80 with, for example, three drilling tools 82 arranged next to each other. The drilling tools 82 may each have a rod-like design with a lower drilling head for removing the earth material and an adjacent conveying and mixing auger. Other embodiments of the at least one drilling tool 82 are also possible, for example with separate conveying and mixing segments. Preferably, three drilling tools 82 arranged next to each other may be used to form an elongated borehole 3 in the ground 1.

[0050] The earthen material removed by each drilling head is carried upwards by the auger into the rear region of the hole 3. The drilling tool 82 may be configured with a hollow core barrel through which the hardenable suspension can flow down into the lower region of the drilling tool 82 and out into the hole 3 via an outlet opening (not shown). The suspension is fed via a hose-like feed line 24 from the carrier 32 to the upper end of the drilling tool 82 in the region of the drill drive 83. Furthermore, the outlet opening for the suspension can also be designed to discharge along the rod-like drilling tool 82 in the region of the feed screw.

[0051] The removed earth material can be at least partially transported upwards by the drilling tool 82 and mixed with the supplied hardening suspension by the rotational movement of the drilling tool 82, in particular the auger, to form the soil mortar 5. The soil mortar 5 thus produced on-site can harden in the created excavation hole to form the desired foundation element 8.

[0052] 7 shows by way of example a possible display 90 on a screen or a possible protocol graph, which can be displayed to the device operator on the machine's screen and / or printed by the control device of the device 50 when carrying out the method according to the invention. In a first part 91 on the left side of the display 90, the depth progression of the machining tool 42 over time can be displayed. In particular, from the display 90 according to FIG. 7 it can be seen that the machining tool 42 is lowered almost uniformly from the surface to a depth of about 12 meters within about 50 minutes, and then withdrawn again from the final depth to the surface within the following 20 minutes.

[0053] In the following second section 92, each depth can be used to indicate the amount of suspension introduced and acted upon in the hole 3 at that depth. The amount of suspension introduced in each case is shown as a bar 95 at each 0.5 meter depth section, the second section 92 referring to the introduction of suspension during the submersion of the machining tool.

[0054] Meanwhile, in the next third section 93, the amount of suspension taken up in each depth section when the machining tool is pulled can be displayed as a bar 95, also in each case 0.5 meter depth section.

[0055] Furthermore, the total amount of suspension taken up across each depth portion during the depression and withdrawal of the machining tool 42 may be shown in the fourth portion 94 on the next right. It should be noted that in Figure 7, the scale of the amount relative to the X axis is different for portions 92, 93, and 94, but the depth portion relative to the Y axis may be the same for portions 91, 92, 93, and 94.

[0056] Using the control system, it can be determined that the same amount of suspension is introduced into each depth section, or different predetermined amounts of suspension are introduced into each depth section after lowering and lifting. With the help of evaluation software, a comparative graph can also be created of the performed tool revolutions per meter of ground depth. During the run, the machine operator is shown a comparative diagram of the suspension amount, and the tool revolutions are additionally displayed on the machine's work screen depending on the process. [Explanation of symbols]

[0057] 1 ground 3 holes 5. Soil mortar 8 Basic Elements 20 Feeding device 22 Suspension pump 30 equipment 40 Earth removal equipment 42 Processing tools 50 Milling Machine 64 Milling Wheel 66 Removal Elements 70 Drilling Rig 82 Drilling tools

Claims

1. A method for producing foundation elements on the ground from soil mortar (5), comprising an earth removal device (40) with at least one rotary driven processing tool (42), wherein: the at least one processing tool (42) is moved in a substantially vertical direction relative to the ground (1), and soil material is removed by forming holes (3) in the ground (1) with the at least one rotary driven processing tool (42); A hardenable suspension is fed into said hole (3), the removed earth material remains at least partially within the hole (3) and is mixed in situ with the supplied suspension by the at least one rotary driven working tool (42) to form the earth mortar (5); the formed soil mortar (5) hardens in the ground (1) onto the foundation element (8) after the at least one rotary driven working tool (42) is withdrawn from the hole (3); a method, 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 the suspension, and at least one dimensioning of the base element (8) represent method parameters; where: the method is carried out at least in part automatically using a control device, and at least one method parameter is input as a default value into the control device; at least one remaining method parameter is set and controlled by the control device in response to the at least one input default value; method.

2. The method parameters include or additionally comprise at least one of the following parameters: a rotation speed of the machining tool (42), a rotation direction of the machining tool (42), a torque of the machining tool (42), a number of revolutions per depth feed of the machining tool (42), a vertical movement speed or vertical feed force when lowering or withdrawing the machining tool (42), a suspension feed rate, a suspension feed amount, or a combination of these parameters. The method of claim 1.

3. The at least one rotary-driven machining tool (42) includes a drilling tool (82) that is rotary-driven about a drilling axis that is oriented substantially vertically, and the hole (3) is formed by drilling. The method according to claim 1 or 2.

4. the at least one rotary-driven machining tool (42) includes a milling wheel (64) that is driven to rotate about a milling wheel axis that is substantially horizontally oriented, and the hole (3) is created by milling; The method according to claim 1 or 2.

5. At least one rotary driven processing tool (42) has at least one removal element (66) for removing and pulverizing earthen material, and / or at least one mixing element for mixing the removed earthen material with the supplied suspension.

5. The method according to any one of claims 1 to 4.

6. the feeding of the suspension into the bore (3) and the movement of the at least one rotary driven machining tool (42), in particular the rotation of the at least one rotary driven machining tool (42), are input into the control device as default values; and the substantially vertical movement of the at least one rotary driven machining tool (42) is set by the control device in accordance with the input default value; 6. The method according to any one of claims 1 to 5.

7. a vertical lowering of the at least one rotary driven machining tool (42) is set by the control device if this is not a default value, and / or a vertical extension of the at least one rotary driven machining tool (42) is set if this is not a default value.

7. The method according to any one of claims 1 to 6.

8. the rotation of the machining tool (42) and / or the speed and / or amount of suspension feed are set by the control device if they are not default values; 8. The method according to any one of claims 1 to 7.

9. the control device controls the feeding device (20), in particular the suspension pump, via which the suspension is fed into the bore (3); 9. The method according to any one of claims 1 to 8.

10. A device for producing foundation elements on the ground (1) from soil mortar (5), in particular according to any one of claims 1 to 9, comprising an earth removal device (40) with at least one rotary driven processing tool (42), wherein said device (30) comprises: moving the at least one processing tool (42) in a substantially vertical direction relative to the ground (1), and removing earth material by forming holes (3) in the ground (1) with the at least one rotary driven processing tool (42); A setting suspension is fed into said holes (3) by a feeding device (20), mixing the supplied suspension with the removed earth material in situ in the hole (3) by the at least one rotary driven processing tool (42) to form the earth mortar (5); the formed soil mortar (5) hardens in the ground (1) onto the foundation element (8) after the at least one rotary driven working tool (42) is withdrawn from the hole (3); 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 the suspension, and at least one dimensioning of the base element (8) represent method parameters; where: a control device is provided and configured so that the creation of the base element (8) can be performed at least partly automatically, wherein at least one method parameter is input to the control device as a default value; a substantially vertical movement of the at least one rotary driven machining tool (42) is set by the control device in accordance with the input default value; Device.

11. The apparatus (30) is configured as a drilling rig (70), and the at least one rotary driven machining tool (42) includes a drilling tool (82) that is rotationally driven about a substantially vertically oriented drilling axis.

11. The apparatus of claim 10.

12. The drilling device (70) has a plurality of drilling tools (82) arranged adjacent to each other in parallel.

12. The apparatus of claim 11.

13. The device (30) is configured as a milling machine, in particular a diaphragm wall milling machine (50), and the at least one rotary-driven machining tool (42) has a milling wheel (64) that is driven in rotation about a milling wheel axis that is oriented substantially horizontally.

11. The apparatus of claim 10.

14. The milling machine has a plurality of milling wheels (64), in particular two pairs of milling wheels, which are arranged side by side, 14. The apparatus of claim 13.

15. a suspension pump (22) arranged to pump suspension into the bore (3), the suspension pump (22) being controlled by the control device; 15. Apparatus according to any one of claims 10 to 14.

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