Construction machine and method for introducing fresh concrete into a borehole using a spout

Abstract

The invention relates to a construction machine (10) with a device for introducing fresh concrete into a borehole via a chute (42, 43) which is attached or can be attached to the construction machine (10) in a way that allows it to be raised and lowered by means of a rope (40) and a winch (41), wherein the fresh concrete is guided through the chute (42, 43) and the chute (42, 43) can be alternately lowered and raised in a vertical direction by means of the winch (41) during the introduction of the concrete. According to the invention, the device for placing fresh concrete comprises a control unit (11) coupled to the winch (41) and configured to perform the following steps: a) performing an automatic concreting cycle, which controls the winch (41) in a predetermined combination of a lowering and a lifting movement, including a change of direction, and b) automatically repeating the automatic concreting cycle until a termination condition is detected.

Description

[0001] The invention relates to a construction machine with a device for introducing fresh concrete into a borehole via a chute, which can be raised and lowered by means of a rope and a winch on the construction machine, wherein the fresh concrete is guided through the chute and which can be alternately lowered and raised in a vertical direction by means of the winch during the introduction.

[0002] The invention also relates to a method for introducing fresh concrete into a borehole using a construction machine on which a chute is arranged to be raised and lowered by means of a rope and a winch, wherein the fresh concrete is guided through the chute and the chute is alternately lowered and raised in a vertical direction by means of the winch during the introduction.

[0003] Such a construction machine must therefore be equipped with a cable, typically guided over a mast or boom (which may be designed as a mast leader), and a winch with which the hopper pipe suspended from the cable can be raised and lowered. Such construction machines are known in various designs and can be stationary or self-propelled, in particular drilling rigs such as large rotary drilling rigs for deep foundation work, cable excavators, or (auxiliary) cranes.

[0004] In all methods for placing fresh concrete, voids between the aggregates and cavities between the concrete and the formwork or borehole wall must be avoided. Furthermore, the concrete must be placed in layers. The free fall height should not exceed 1-2 meters, as segregation of the fresh concrete can occur above this height. For greater drop heights, especially when placing fresh concrete during the construction of bored piles, tremie tubes must be used, which may be positioned below a hopper into which the fresh concrete is typically fed via a concrete mixer or concrete pump. The use of tremie tubes also helps to prevent the concrete from mixing with loose soil from the borehole walls.

[0005] The injection of concrete for the production of concrete piles using a tremie pipe is also carried out as part of a tremie method, in which the tremie pipe is inserted into a borehole up to the pile base. The concrete emerges at the lower edge of the pipe and pushes water, mud, and the support fluid upwards, so that the concreting process takes place from bottom to top. The tremie method, and thus also the invention, can also be used in the production of underwater concrete structures.

[0006] The term "pouring pipe" is used in this description as a unified term and encompasses an auxiliary element that is also referred to in the prior art as a "downpipe," "concreting pipe," or "conveyor pipe." Furthermore, for the sake of simplicity, this term is used in the singular, but it is also intended to include a pouring pipe that is assembled from several shorter pipe segments to achieve a desired greater length and may have an extended section at the upper end in the form of a filling funnel. The diameter of such a pouring pipe for filling concrete can, for example, be 150 to 300 mm.

[0007] For the sake of simplicity, the term "concrete" or "fresh concrete" is used in this description as a generic term for building materials or mixtures and suspensions that are flowable in their fresh, uncured state and are used to produce structures, for example bored piles in uncased or fully or partially cased boreholes in civil engineering.

[0008] During the concreting process using a siphon, a dynamic up-and-down movement of the siphon is generally necessary to ensure the continuous flow of fresh concrete through the siphon, especially with smaller pipe diameters and / or viscous concrete mixes, such as those containing coarse aggregates. However, the frequent manual operation of the machine's controls to alternately drive the winch for quickly raising and lowering the siphon suspended from the cable over a period of time is very strenuous and tiring for the operator, particularly since an ongoing concreting process cannot be interrupted for extended periods and can last for several hours.

[0009] Another problem with manually controlling the winch to raise and lower the hopper pipe can be that the speed of the lifting and lowering motion and the change of direction are either not fast enough, so that the momentum exerted on the concrete mass does not prevent the flow within the hopper pipe from stopping. In any case, manually controlling the winch requires considerable experience and a good feel for the forces and accelerations occurring during operation and their effects on the machine components and materials used.

[0010] The invention is based on the Task The basis is to specify a method for introducing fresh concrete into a borehole using a construction machine and a construction machine with a device for introducing fresh concrete into a borehole, with which a concreting process can be carried out reliably and ergonomically.

[0011] The problem is solved, firstly, by a construction machine with a device for injecting fresh concrete into a borehole, having the features of claim 1, and secondly, by a method for injecting fresh concrete into a borehole using a construction machine, having the features of claim 9. Preferred embodiments of the invention are specified in the respective dependent claims.

[0012] The construction machine according to the invention therefore has a device for introducing fresh concrete into a borehole via a chute, which is attached or can be attached to the construction machine in a way that allows it to be raised and lowered by means of a rope and a winch, wherein the fresh concrete is guided through the chute and the chute can be alternately lowered and raised in a vertical direction by means of the winch during the introduction process. This construction machine is characterized in that the device for introducing fresh concrete comprises a control unit that is coupled to the winch and is configured to perform the following steps: a) Performing an automatic concreting cycle, which controls the winch in a predetermined combination of a lowering and a lifting movement including a change of direction, and b) automatically repeating the automatic concreting cycle until a termination condition is detected.

[0013] The inventive method for placing fresh concrete into a borehole using a construction machine on which a chute is arranged to be raised and lowered by means of a rope and a winch, wherein the fresh concrete is guided through the chute and the chute is alternately lowered and raised in a vertical direction by means of the winch during the placement process, is characterized in that it comprises the following steps: a) Performing an automatic concreting cycle using a control device for the winch, with which the winch is controlled in a predetermined combination of a lowering and a lifting movement including a change of direction, and b) automatically repeating the automatic concreting cycle until a termination condition is detected.

[0014] A basic idea of ​​the invention is to replicate the dynamic up and down movement of the hopper pipe during the concreting process, which was previously generated by demanding manual operation of the winch, by means of an automatic concreting cycle using a control device, which controls the winch in any predetermined combination of a lowering and a lifting movement including a change of direction and thereby exerts the necessary impulses on the hopper pipe.

[0015] The term "combination" encompasses both a basic cycle that begins with a lifting movement, changes direction, and ends with a lowering movement, and a basic cycle that begins with a lowering movement, changes direction, and ends with a lifting movement. The term "combination" can also include further movements or the deliberate, temporary stopping of the movement during the respective phases within such a basic cycle. The selection of the specific variant of the basic cycle depends on the position of the burrow pipe relative to the borehole edge or a concrete feed device.

[0016] According to the invention, this predefined automatic concreting cycle is automatically repeated until a termination condition is detected. The automated sequence and automatic repetition of the cycle significantly simplifies the operation of the construction machine, as the repeated change of direction of the winch within a cycle or in repeated cycles can be triggered or started by a simple actuation of a control element on the control unit. This considerably increases the comfort and reduces the workload for the machine operator, even if a concreting process takes a considerable amount of time.

[0017] Furthermore, storing the control commands in the control device within the predefined automatic concreting cycle also allows the coding of the control dynamics with regard to the acceleration of the winch in the first direction (raising or lowering), with delay and rapid zero crossing during changes of direction, and in the other direction (lowering or raising), thus enabling less experienced operators to operate the construction machine and preventing a stalling of the concrete flow due to insufficient impulse generation or excessive impulse generation with potential for damage.

[0018] Thus, the invention demonstrates a way to upgrade existing construction machines (for example, cranes, cable excavators or drilling rigs) in a relatively simple manner, in order to improve the ergonomics and safety of use, where the execution of a concreting process such as the one described can only be achieved through elaborate, repeated manual operation of the cable winch.

[0019] A preferred embodiment of the construction machine according to the invention consists in that an input device is provided on it which is coupled to the control device and is designed to allow input or selection of an initial direction of the automatic concreting cycle (raising or lowering) and / or a cycle duration of the automatic concreting cycle and / or a speed of the winch during the automatic concreting cycle and / or a distribution of a drive duration of the winch between raising and lowering within the automatic concreting cycle.

[0020] In this method, it is analogously preferred to specify an initial direction of the automatic concreting cycle and / or a cycle duration of the automatic concreting cycle and / or a speed of the winch during the automatic concreting cycle and / or a distribution of a drive duration of the winch between lifting and lowering within the automatic concreting cycle.

[0021] In this respect, the initial direction of the up and down movement can be selected and time-controlled within the cycle. This is advantageous because no further parameters or sensors are required to execute the movement cycle. The maximum or full speed of the winch is typically preset or selected for each direction to generate maximum momentum on the cable and thus on the hopper during the change of direction. However, the speed can also be adjustable. For this reason, the change of direction is advantageously also performed at maximum speed, without stopping at the zero position of the winch's drive motor.

[0022] The distribution of the winch's operating time between lifting and lowering within the automatic concreting cycle defines the timing ratio between lifting and lowering. With a 1:1 distribution, or 50% to each direction, the set cycle time is evenly distributed between lifting and lowering. A possible range for the total cycle time is, for example, from 1000 ms to 5000 ms. Since the lifting and lowering distances of the siphon are not necessarily identical when the winch is driven simultaneously by a purely time-controlled mechanism, because gravity acts on the mass of the cable and siphon during lowering, while during lifting the mass of the siphon and cable must also be accelerated against gravity, the position of the reversal point can drift after several cycles and gradually shift downwards.To compensate for this drift, the distribution of the winch's operating time between lifting and lowering within the automatic concreting cycle – with otherwise identical acceleration – can be varied. This can be achieved, for example, by allocating a slightly longer proportion of the total cycle time to lifting than to lowering. In this way, the reversal point can be kept nearly stationary.

[0023] The (uneven) distribution of the drive time of the cable winch between lifting and lowering within the automatic concreting cycle can be changed by designing the input device with the possibility of a corresponding dynamic change of the input value of the distribution of the drive time even during a concreting process, in order to compensate for an observed drift in one direction or the other.

[0024] In an alternative embodiment, which can be described as a path control system, an input device can be provided that is coupled to the control unit and designed to allow input or selection of an initial direction of the automatic concreting cycle and / or a lifting distance of the cable during raising and lowering within the automatic concreting cycle and / or a speed of the cable winch during the automatic concreting cycle. This variant, however, requires a sensor, known per se, for depth measurement or for detecting the unwinding length of the cable and feedback of this detection result to the control unit.Here too, the input values ​​for the cable's lifting distance during raising and lowering within the automatic concreting cycle can vary to compensate for any drift of the reversal point. However, the tendency for such drift to occur will be minimal due to the actual measurement of the lifting distance and feedback. Nevertheless, dynamic adjustment and modification of the input values ​​during a concreting cycle is also conceivable with this variant, if necessary to deliberately induce drift. Again, to maximize momentum, it is preferable to preset or select the maximum or full speed for the cable winch in each direction. The speed can also be adjustable. A possible range for the lifting distance in each direction could, for example, be from 10 to 30 cm.

[0025] A particularly simple operation of the construction machine can be achieved according to a further development of the invention by configuring a control input element of the control unit for starting and / or stopping the automatic concreting cycle and preferably for specifying an initial direction of the automatic concreting cycle as one of lowering and raising. The control input element can, for example, include function keys for selecting the cycle and its respective initial direction, as well as for stopping. However, a particularly ergonomic and therefore preferred design of the control input element is in the form of a joystick, which triggers the start by being deflected (if necessary).in conjunction with the simultaneous activation of another switch or function key to prevent an unintentional start of the cycle) and which preferably specifies the initial direction of the automatic concreting cycle (lifting or lowering) by means of a deflection direction from a zero position.

[0026] The control input element can also be designed so that, upon release of the actuator and / or upon return to the zero position (especially in the case of a joystick), it fulfills the termination condition for the execution of the automatic concreting cycle (possibly in conjunction with the simultaneous deactivation of the other switch or alternatively by pressing a function key). This ensures a reliable and rapid cessation of operation, similar to a "dead man's switch".

[0027] The control unit can further be designed to derive the start of the automatic concreting cycle and / or the termination condition from information provided externally to the construction machine, in particular from a sensor to detect the presence of concrete at the hopper, from a sensor to detect the concrete level in the borehole, or from a conveying device (e.g., a concrete pump) for the concrete supplied to the hopper. This further development allows the concreting process to be automated even more and made even safer against operator errors.

[0028] Furthermore, it is also possible to define the termination condition such that it is met after a predetermined or dynamically determined number of repetitions of the automatic concreting cycle. The latter can, for example, be determined as a function of the processed concrete volume, whereby it is preferred to use a suitable sensor to detect the quantity of concrete poured into a borehole and to input this data into the control unit of the construction machine or the device for placing fresh concrete, which can then calculate the required number of cycles.

[0029] Finally, according to one embodiment of the invention, it is particularly preferred that the motor drive of the winch is a hydraulic motor, wherein the control of the hydraulic motor by the control device for carrying out the method can preferably be effected either directly at the hydraulic motor or via control of a hydraulic circuit hydraulically coupled to the hydraulic motor, and further preferably via control of a hydraulic pump hydraulically coupled to the hydraulic motor. Winch drives in construction machinery are usually implemented as hydraulic components. The indirect control of the hydraulic motor via the control of the pump (by designing the pump, for example, as a so-called swiveling pump with the possibility of reversing the direction of flow) allows for finer adjustment and a faster and smoother change of the direction of rotation for reversing the direction via the neutral position.

[0030] Alternatively, the use of an electric motor as a drive for the winch is also conceivable, which in turn can be directly controlled via the control unit according to the cycle.

[0031] The control input element of the control unit for starting and stopping the automatic concreting cycle, and optionally the input device for the cycle parameters, can be located within an operator's station for the excavation machine and integrated into a control console. They can also be implemented individually or together in a separate control unit or terminal, which is connected – either wired or wirelessly – to the machine's control unit to transmit the input. This allows the machine to be operated during the concreting process from outside the machine, for example, closer to a borehole, potentially reducing the number of personnel required.

[0032] The advantages previously described using the construction machine can be achieved in a similar manner with this method. In particular, the method can be carried out using the construction machine described above.

[0033] The invention is further described below with reference to preferred embodiments, which are shown schematically in the drawings. The drawings show: Fig. 1 is a schematic side view of a construction machine according to the invention, using the example of a civil engineering machine, and Fig. 2 is a schematic representation of a construction machine according to the invention, which is similar to the construction machine of Fig. 1 similar and equipped with a dispensing pipe for the concreting process. A construction machine 10 according to the invention, which can be exemplified as a civil engineering machine 10 in the form of a rotary drilling rig according to Fig. 1 The vehicle is designed with a chassis 12, preferably a crawler track, and a superstructure 14 rotatably mounted thereon. The chassis 12 and the superstructure 14 form a carrier unit 15. The drive units and the operator's station for the operator of the construction machine 10 can be arranged on the superstructure 14 in a known manner. The operator's station can include a control unit 11 and a display unit, in particular a monitor, as well as an input unit and control input elements for operating the units of the construction machine 10 and for entering or selecting specific control parameters. These components, which function as an interface with the operator, are known per se and are used for the purposes of the invention and assigned to the corresponding control functions.

[0034] A substantially vertical mast 18 with an upper mast head 19 can be adjustably mounted on the front of the superstructure 14 via a linkage 16 with neck cylinders. A carriage 20 can be slidably guided along the front of the mast 18. A first drilling drive 22, which may include a hydraulic motor 24, can be provided on the carriage 20. Furthermore, a second drive 26 for additional tools can be provided on the carriage 20. The second drive 26 can, for example, essentially consist of a gearbox connection to the first drilling drive 22 with the hydraulic motor 24 to transmit torque.

[0035] The approximately sleeve-shaped first drill drive 22 can, for example, be penetrated by a drill string 30, which can be designed as a Kelly bar with external drive bars. The drill string 30 can have an upper suspension 32, to which it is connected by a main rope 39. The main rope 39 can be guided via pulleys at the mast head 19 to a main winch 38 on the top of the superstructure 14. By actuating the main winch 38, the drill string 30 can be moved vertically.

[0036] The carriage 20 can be connected to a feed cable 37, which can be guided above and below the carriage 20 along the mast 18 and operated by a feed winch 36. The feed winch 36 allows the carriage 20 to be moved up or down along a guide on the mast 18.

[0037] A drilling tool, designated as a deep-cutting tool 34 for removing soil material, is attached to one underside of the drill string 30. In the illustrated embodiment, the deep-cutting tool 34 is designed according to Fig. 1 The drilling process is carried out using a drill bucket. The type and diameter of the drilling tool must be selected according to the soil composition and the diameter of the borehole to be drilled.

[0038] Near the feed winch 36, also located at the front of the superstructure 14 and at the rear of the mast 18, is an auxiliary winch 41, which operates an auxiliary cable 40. This cable extends from the auxiliary winch 41 over the mast head 19 and serves to raise and lower external components. According to the invention, the auxiliary winch 41 and the auxiliary cable 40 are used to raise and lower a chute 42 suspended from the cable, at the upper end of which an (optional) filling hopper 43 is arranged, during a concreting process, as shown in [reference to illustration]. Fig. 2 based on a comparison with the Fig. 1The only slightly modified construction machine 10 is explained. The hopper pipe 42 extends to and just above the bottom of the borehole. In this phase, the deep-construction tool 34, which is not needed during the concreting process, is raised and inactive along the mast 18, while the mast 18 is tilted slightly forward to increase the distance between the deep-construction machine 10 and the borehole, thus creating space for bringing the concrete into the hopper pipe 42 and filling it, for example, by a concrete mixer 50.

[0039] The deep drilling machine 10 can, for example, create a fully or partially cased or even an uncased borehole in the ground 1. To form a foundation element, for example a concrete pile in the ground 1, a hardenable building material or hardenable building material mixture such as concrete can be introduced into the borehole, which then hardens to form the foundation element. A support pipe 44 can remain in the borehole as part of the foundation element or, preferably, be withdrawn from the ground 1 before the introduced building material has hardened. A pre-installed reinforcing mesh 45 is located in the borehole.

[0040] The type of construction machine is relevant for the purposes of the invention only insofar as it must have a winch and a cable (in the example, the auxiliary winch 41 and the auxiliary cable 40 are used for this purpose) with which the hopper pipe 42 can be cyclically raised and lowered during the concreting process to ensure the flow of the concrete through the hopper pipe and to prevent stalling and blockage. Therefore, a stationary or self-propelled construction machine, in particular a drilling rig, especially a rotary drilling rig for underground construction (as shown in the example), a cable excavator, or an (auxiliary) crane can be used. Depending on the number and depth of the concrete piles to be produced in the ground, separate construction machines can also be used for drilling and concreting, so that they can work simultaneously on different boreholes. It is also conceivable, when using an underground construction machine 10 as shown, to raise and lower the hopper pipe 42 (if necessary).to attach the filling funnel 43) to the main rope 38 and to operate it via the main winch 39, unless this is needed or occupied for another component.

[0041] The underground construction machine 10 is shown in the illustration of Fig. 2The device is equipped with a mechanism for introducing fresh concrete into a borehole via a chute 42 (here with a filling funnel 43), which can be cyclically raised and lowered in the direction of the double arrow by means of the auxiliary cable 40 and the auxiliary winch 41 of the excavation machine 10. The fresh concrete is guided through the chute 42 for injection into the borehole, and the chute 42 can be rapidly and alternately lowered and raised in a vertical direction by means of the winch 41 during the injection process. This is done to exert an impulse on the concrete via the pipe during the change of direction, preventing it from sticking to the inner wall of the pipe or clumping. As previously described, this process was carried out manually by operating the auxiliary winch 41 via the control unit 11 of the excavation machine, which is coupled to the winch 41, and its control input elements.

[0042] According to the invention, the device for placing fresh concrete comprises a control unit 11, which is functionally designed to carry out the previously described automatic concreting cycle, which automatically controls the winch 41 in a predetermined combination of a lowering and a lifting movement including a change of direction, and which is also designed to automatically repeat the once activated automatic concreting cycle as often or as long as necessary until a termination condition is detected.

[0043] In the functional context of the device for placing fresh concrete, an input device (not shown) is provided and coupled to the control device 11. This device is configured to allow input or selection of the cycle duration of the automatic concreting cycle and / or the speed of the winch 41 during the automatic concreting cycle and / or the distribution of the winch 41's operating time between lifting and lowering within the automatic concreting cycle. Using these parameters, the control device 11 can control the automatic operation of the winch according to a time schedule.

[0044] Alternatively, this input device can be configured to allow the input or selection of a lifting distance of the cable 40 during lifting and lowering within the automatic concreting cycle and / or a speed of the winch 41 during the automatic concreting cycle. Using these parameters, the control unit 11 – in conjunction with a measurement of the cable length unwound by the winch – can control the automatic operation of the winch in a distance-controlled manner. It should be noted that the maximum speed is generally preselected for the winch speed during the automatic concreting cycle in order to generate the maximum possible torque or impulse when changing direction; however, a change to a reduced speed may be possible and useful in certain cases.

[0045] The input device for these parameters can be, for example, a keyboard, a touchscreen, a potentiometer, or another known input device for numerical inputs, via which the corresponding inputs can be made to a GUI (Graphical User Interface) of the control unit, for example, by offering and selecting predefined values ​​from a data memory. A program module stored in the control unit can then calculate and output the necessary control commands for the auxiliary winch based on these selected parameters.

[0046] The implementation of the control commands at the winch for carrying out the process according to the automatic concreting cycle, more precisely at a motor drive of the winch, which is usually a hydraulic motor, but can also be an electric motor in some cases, takes place either directly at the motor or via a control of a hydraulic circuit hydraulically coupled to the hydraulic motor, further preferably via a control of a hydraulic pump hydraulically coupled to the hydraulic motor, which modulates the hydraulic oil flow to the hydraulic motor.

[0047] In addition to this input device for the parameters of the automatic concreting cycle, the control unit also includes a control input element (not shown) that allows the automatic concreting cycle to be started and stopped, and preferably also allows the initial direction of the automatic concreting cycle (lowering or raising) to be specified or selected. A joystick, commonly used in modern construction machinery, is suitable for this function. It can be configured or pre-assigned for the automatic concreting cycle (for example, by initially selecting the automatic concreting cycle via a menu or a switch) such that deflecting the joystick triggers the start of the cycle, and deflection from a neutral position defines the initial direction of the automatic concreting cycle.The joystick can also be pre-programmed so that releasing it and / or returning it to the zero position fulfills the termination condition for the automatic concreting cycle, immediately stopping it. To increase safety, an additional switch can be provided for starting and stopping (for example, also within reach of the joystick), which must be activated once to start the automatic concreting cycle and / or continuously to continue the process.

[0048] In further embodiments, the control device can also be functionally designed for further monitoring and automation in order to derive the start of the automatic concreting cycle and / or the termination condition from information provided externally to the construction machine, for example from a sensor to detect the fill level of the concrete in the borehole or from a sensor to detect the presence of concrete on the hopper pipe or from a sensor or control device on a conveying device for the concrete supplied to the hopper pipe (for example a concrete mixer or a concrete pump).

Claims

1. Construction machine (10) with a device for placing fresh concrete into a borehole via a chute (42, 43) which is attached or can be attached to the construction machine (10) in a way that allows it to be raised and lowered by means of a rope (40) and a winch (41), wherein the fresh concrete is guided through the chute (42, 43) and the chute (42, 43) can be alternately lowered and raised in a vertical direction by means of the winch (41) during the placement process. characterized by that The device for placing fresh concrete comprises a control unit (11) coupled to the winch (41) and configured to perform the following steps: a) performing an automatic concreting cycle which controls the winch (41) in a predetermined combination of a lowering and a lifting movement including a change of direction, and b) automatically repeating the automatic concreting cycle until a termination condition is detected.

2. Construction machine according to claim 1, characterized by that An input device is provided which is coupled to the control device (11) and is designed to allow input or selection of an initial direction of the automatic concreting cycle and / or a cycle duration of the automatic concreting cycle and / or a speed of the winch (41) during the automatic concreting cycle and / or a distribution of a drive duration of the winch (41) between lifting and lowering within the automatic concreting cycle.

3. Construction machine according to claim 1, characterized by that An input device is provided which is coupled to the control device (11) and is designed to allow input or selection of an initial direction of the automatic concreting cycle and / or a lifting distance of the rope (40) during lifting and lowering within the automatic concreting cycle and / or a speed of the winch (41) during the automatic concreting cycle.

4. Construction machine according to one of claims 1 to 3, characterized by that A control input element of the control device for starting and / or stopping the automatic concreting cycle and preferably for specifying an initial direction of the automatic concreting cycle as one of lowering and raising, preferably in the form of function keys and / or a joystick which triggers the start by deflection and preferably specifies the initial direction of the automatic concreting cycle by a deflection direction from a zero position, and which fulfills the termination condition of the execution of the automatic concreting cycle when released and / or when returning to the zero position.

5. Construction machine according to one of claims 1 to 4, characterized by thata motor drive of the cable winch is a hydraulic motor, wherein the control of the hydraulic motor by the control device for carrying out the method is preferably either directly or via a control of a hydraulic circuit hydraulically coupled to the hydraulic motor, further preferably via a control of a hydraulic pump hydraulically coupled to the hydraulic motor.

6. Construction machine according to one of claims 1 to 4, characterized by that The motor drive of the cable winch is an electric motor, whereby the control of the electric motor is carried out directly by the control device to execute the procedure.

7. Construction machine according to one of claims 1 to 6, characterized by thatThe control device is designed to derive the start of the automatic concreting cycle and / or the termination condition from information provided externally to the construction machine, in particular from a sensor to detect the presence of concrete on the hopper, from a sensor to detect a level of concrete in the borehole, or from a conveying device for the concrete supplied to the hopper.

8. Construction machine according to one of claims 1 to 7, characterized by that this is designed as a stationary or self-propelled construction machine (10), in particular as a drilling rig, in particular a rotary drilling rig for civil engineering, as a cable excavator or as a crane.

9. Method for placing fresh concrete into a borehole using a construction machine (10) on which a chute (42, 43) is arranged to be raised and lowered by means of a rope (40) and a winch (41) of the construction machine (10), wherein the fresh concrete is guided through the chute (42, 43) and the chute (42, 43) is alternately lowered and raised in a vertical direction by means of the winch (41) during placement, characterized by that The procedure comprises the following steps: a) performing an automatic concreting cycle by means of a control device (11) for the winch (41), with which the winch (41) is controlled in a predetermined combination of a lowering and a lifting movement including a change of direction, and b) automatically repeating the automatic concreting cycle until a termination condition is detected.

10. Method according to claim 9, characterized by thata starting direction of the automatic concreting cycle and / or a cycle duration of the automatic concreting cycle and / or a speed of the winch during the automatic concreting cycle and / or a distribution of a drive duration of the winch between lifting and lowering within the automatic concreting cycle is specified.

11. Method according to claim 9, characterized by that an initial direction of the automatic concreting cycle and / or a lifting distance of the rope (40) during lifting and lowering within the automatic concreting cycle and / or a speed of the winch (41) during the automatic concreting cycle is specified.

12. Method according to any one of claims 9 to 11, characterized by thatThe control of the winch is effected by a control of a motor drive of the winch, which is preferably an electric motor or a hydraulic motor, wherein the control in the case of the electric motor is preferably direct and the control in the case of the hydraulic motor is preferably either direct or via a control of a hydraulic circuit hydraulically coupled to the hydraulic motor, further preferably via a control of a hydraulic pump hydraulically coupled to the hydraulic motor.

13. Method according to any one of claims 9 to 12, characterized by thatThe automatic concreting cycle is started and preferably an initial direction of the automatic concreting cycle is specified as one of lowering and raising via a control input element of the control device, preferably in the form of a joystick which triggers the start by deflection and preferably specifies the initial direction of the automatic concreting cycle by a deflection direction from a zero position, and which fulfills the termination condition of the execution of the automatic concreting cycle when released and / or when returning to the zero position.

14. Method according to any one of claims 9 to 13, characterized by thatThe start of the automatic concreting cycle and / or the termination condition is derived from information provided externally to the construction machine, in particular from a sensor to detect the presence of concrete on the hopper, from a sensor to detect a level of concrete in the borehole, or from a conveying device for the concrete supplied to the hopper.

15. Method according to any one of claims 9 to 14, characterized by that The construction machine (10) used for the method is a stationary or self-propelled construction machine, in particular a drilling rig, in particular a rotary drilling rig for civil engineering (10), a cable excavator or a crane or preferably a construction machine according to one of claims 1 to 8.

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