Civil engineering machine and civil engineering method

Abstract

The invention relates to a civil engineering machine comprising a carrier device, a leader, which has a linear guide for a working carriage and is mounted on the carrier device, a working carriage, which is guided displaceably along the leader, and a lifting cable, which is attached to the working carriage for displacing, in particular lifting, the working carriage along the leader. According to the invention, at least one detection device is provided, which is designed to detect a cable break of the lifting cable, at least one braking device is provided, which is designed to brake and hold the working carriage on the leader, and a control device is provided, which is designed to activate the braking device in the event that a cable break of the lifting cable is detected by the detection device, in order to brake and / or hold the working carriage.

Description

[0001] II* wunderlich & heim

[0002] MIPATTEN ATTORNEY

[0003] B 3910

[0004] CIVIL ENGINEERING MACHINE AND CIVIL ENGINEERING METHODS

[0005] The invention relates to a civil engineering machine with a carrier device, a mast which has a linear guide for a work carriage and is mounted on the carrier device, a work carriage which is slidably guided along the mast, and a lifting cable which is attached to the work carriage for moving, in particular for lifting, the work carriage along the mast, according to the preamble of claim 1.

[0006] The invention further relates to a method for operating a civil engineering machine, in particular for carrying out with a civil engineering machine according to the invention, comprising a carrier device, a guide which has a linear guide for a working carriage and is mounted on the carrier device, a working carriage which is slidably guided along the guide, and a lifting cable which is attached to the working carriage for moving, in particular for lifting, the working carriage along the guide, according to the preamble of claim 15.

[0007] Civil engineering machinery and methods that utilize elongated soil cultivation tools, such as augers, drill buckets, or soil mixing tools, or pile drivers, have long been employed for constructing foundation elements, for example, for creating foundation piles or bored pile walls. Such soil cultivation tools can be several meters long, for example, up to 20 meters or more. A work carriage is typically used for height-adjustable mounting of the soil cultivation tools. This carriage is guided on guides attached to a mast of the civil engineering machine and held vertically by a lifting cable. A winch is used to raise and lower the work carriage, which usually also houses the drill drive for rotating the drilling tool. This winch transmits force to the work carriage via the lifting cable.

[0008] In the field of civil engineering, the steel cables used are typically subjected to high loads and significant wear during operation. Even with regular inspection and timely replacement of the cables, a cable break cannot be completely ruled out. Since the work carriage with attached equipment, especially the drilling drive with a gearbox and often several hydraulic motors, can weigh up to several tons, a break in the feed cable and the resulting fall of the work carriage poses a considerable risk of damage. There is also a high risk of injury, particularly for surrounding workers who may be in the danger zone, for example, when installing drill pipes or replacing wear parts on the civil engineering machine.Likewise, the falling of the work carriage can cause significant material damage, up to and including total loss of the work carriage and other components of the civil engineering machine.

[0009] In the field of aerial tramways, it is common practice to provide track rope brakes in case of a haul rope break. Track rope brakes are typically pre-tensioned by a spring and / or the cabin weight and clamp onto the track rope after activation. Such systems have proven reliable and are specifically designed and developed for use in aerial tramways suspended from one or more tensioned wire ropes and pulled by a haul rope.

[0010] Furthermore, the risk of a hoist cable break is well-known in the field of construction cranes, where safety features that can hold the load in the event of a cable break are usually omitted. To prevent accidents, the cable is therefore subject to particularly stringent controls and must be inspected at regular intervals.

[0011] The invention is based on the objective of providing a civil engineering machine and a method for operating a civil engineering machine in which particularly safe operation can be achieved. This objective is achieved, firstly, by a civil engineering machine with the features of claim 1 and, secondly, by a method for operating a civil engineering machine with the features of claim 15. Preferred embodiments of the invention are specified in the respective dependent claims.

[0012] The underground construction machine according to the invention is characterized in that at least one detection device is arranged which is designed to detect a break in the lifting rope, that at least one braking device is arranged which is designed to brake and hold the working carriage on the mast, and that a control device is provided and designed to activate the braking device in the event of a detected break in the lifting rope by the detection device in order to brake and / or stop the working carriage.

[0013] A fundamental aspect of the invention is to detect a break in the hoist cable of a deep-construction machine and, based on this detection, to initiate countermeasures to prevent the work carriage of the machine from falling uncontrollably. This is achieved by providing a detection device on the deep-construction machine that detects a break in the wire rope to which the work carriage is attached. In this way, a break in the wire rope can be detected at an early stage, for example, by recording certain rope parameters and forces, before the work carriage has reached excessive acceleration. Besides enabling the early initiation of emergency measures, this allows for the continuous monitoring of the hoist cable and thus particularly safe operation.

[0014] Another aspect of the invention is the provision of a special braking device on the underground construction machine, which prevents uncontrolled downward movement of the work carriage, particularly in the event of a break in the lifting cable. In this way, the speed of the work carriage can be reduced, bringing it to a standstill as quickly as possible or allowing it to contact a lower end stop on the mast at a safe speed. Compared to an unbraked downward movement of the work carriage, this prevents significant material damage, especially to the work carriage itself with its costly drilling drive, but also to the carrier machine and the mast. Likewise, the surrounding operating personnel are protected from injury, thus ensuring particularly safe operation.The braking system of the work carriage is designed to prevent significant damage to the excavation machine, particularly to the linear guide of the mast, caused by excessive braking forces. This allows for a particularly efficient and material-friendly braking process. The braking system is preferably mounted on the work carriage.

[0015] An additional aspect of the invention is to detect a rope break and then immediately activate the braking device to prevent the work carriage from accelerating excessively. In other words, the braking device is activated as soon as possible after the lifting rope breaks and is detected by the detection device. A special control unit is used for this purpose, which activates the braking device when the detection device detects a rope break. The control unit operates automatically to ensure particularly rapid activation of the braking device, which is hardly possible with manual control of the braking device, such as during monitoring by the operator.In this way, the forces occurring on the braking system and the mast are reduced to a minimum, which simplifies the design and increases the safety and economy of the civil engineering machine.

[0016] A preferred embodiment of the invention consists in the detection device being designed to detect a drop in the tension of the lifting rope. The detection device can, in particular, be designed as a tensiometer for detecting a drop in the tension of the lifting rope, wherein the lifting rope is deflected and the tension can be calculated from the displacement and the force required. The detection device can, in particular, be designed to measure a threshold value of a minimum rope force. A particularly advantageous embodiment of the detection device consists in a small, spring-loaded pulley pressing against the feed rope, wherein the pulley is designed to pivot when the rope force ceases and actuate an electrical switch. Alternatively, instead of actuating an electrical switch, actuating a hydraulic valve or mechanically releasing the braking device can be provided.This ensures particularly efficient and reliable detection of a rope break in the hoist rope.

[0017] In general, the detection device can be of any type, in particular hydraulic, electronic, optical, or mechanical, and can be arranged in various ways on the underground construction machine according to the invention. According to a particularly advantageous embodiment of the invention, the detection device is designed to detect a force on the deflection pulleys, in particular with a measuring bolt, or to detect a force on the work carriage. By designing the detection device as a measuring bolt, a particularly simple detection of a cable break can be achieved, since no significant structural modifications to the underground construction machine are required. It is also advantageous to replace existing bolts with measuring bolts. The force detection is essentially based on measuring the resistance of a strain gauge. In this way, high accuracy can be achieved at a high sampling rate.The deflection pulleys can be arranged, in particular, at an upper end of the mast. Alternatively or additionally, the detection device can also be located at a reeving point on the work carriage (rope reeving point). Overall, by incorporating a measuring pin into the detection device, the rope detection can be carried out with particular precision at various points on the underground construction machine according to the invention.

[0018] According to a further development of the invention, it is particularly advantageous that the detection device is designed to detect the conductivity of the lifting rope. The detection device can, in particular, be designed to detect the optical and / or electrical conductivity of the lifting rope. It is advantageous if the conductivity of the lifting rope can be detected continuously. For this purpose, the lifting rope can, in particular, have an integrated optical fiber or an additional electrical conductor, for example, for data transmission. The detection device can also, in particular, be designed to detect the electrical resistance of the lifting rope, such as a wire rope. The detection device can be configured such that, upon reaching a limit value, such as a rope tension, force, or conductivity, an electrical, hydraulic, and / or mechanical action command is issued to activate the braking device.This ensures a particularly safe and precise initiation of a braking process.

[0019] According to a particularly advantageous embodiment of the invention, the sensing device is designed to detect the pressure of a tension cylinder, wherein the cable tension cylinder is provided for adjusting the tension of the lifting cable. It is advantageous if the sensing device is designed as an electrical pressure sensor for detecting the pressure of a cable tension cylinder, and the pressure sensor is provided for detecting a pressure drop in the cable tension cylinder. This allows for a particularly cost-effective cable sensing system.

[0020] According to a further particularly advantageous embodiment of the invention, the control unit is designed electronically, mechanically, hydraulically, and / or as part of a control system for the construction machine for directly controlling the braking device. The control unit can be electronically, mechanically, and / or hydraulically connected to the detection device and / or the braking device. It is particularly advantageous if the control unit is designed to output electronic, mechanical, and / or hydraulic control commands to the braking device. This ensures particularly efficient and rapid control of the braking device. It is also particularly advantageous if the detection device, the braking device, and the control unit are interconnected by wires for the exchange of electronic signals.

[0021] To increase the safety of the excavation machine, it can be advantageous for the control unit to be equipped to issue warnings, such as acoustic or visual signals, in the event of a detected break in the lifting rope. This can contribute to increased operator safety.

[0022] A particularly advantageous embodiment of the invention consists in the fact that the civil engineering machine is designed as a drilling rig, a pile driver, a vibratory rig, or a diaphragm wall machine, in particular a diaphragm wall cutter or a diaphragm wall grab, with at least one processing tool, wherein the at least one processing tool is slidably mounted on the mast. In this way, the processing tool is mounted in a height-adjustable manner as required and can be used flexibly. Likewise, the civil engineering machine according to the invention can be used for a particularly wide range of applications due to this design. This increases the safety of the surrounding operating personnel and reduces the general operational risk.

[0023] According to a particularly advantageous embodiment of the invention, the braking device is designed with a single- or double-sided shoe brake, preferably hydraulically or pneumatically actuated, on the work carriage to generate a clamping force on a brake rail, the brake rail running parallel to the mast. In this way, the work carriage, which is vertically displaceable on the mast, can be braked particularly efficiently in the event of a cable break. Likewise, the braking device with the brake rail and the shoe brake can be designed relatively simply and with minimal weight on the excavation machine. It is advantageous if the braking device is designed with a floating caliper for floating mounting. This allows for particularly efficient braking. The kinetic energy of the fall can be converted into thermal energy and dissipated, particularly through friction.In principle, spring-loaded brake shoes can also be provided, which are locked in normal operation and the locking mechanism is released in the event of a cable break in order to exert their braking effect.

[0024] Alternatively or additionally, the braking device can be designed as at least one catch device, wherein the at least one catch device, in particular two catch devices, is provided on the working carriage and comprises a guide rail extending axially along the mast. It is advantageous if the catch device can be mechanically released to generate a clamping force on the guide rail, whereby brake pads press against the guide rail. In this way, a relatively simple and reliable design of the braking device according to the invention can be realized.

[0025] According to one embodiment of the invention, the braking device is designed with at least one pawl on the working carriage, wherein the pawl can be pressed by a spring into a counterpart on the mast. The counterpart can be, for example, a rack or individual flat bars, the flat bars being arranged horizontally on the mast at intervals of approximately 10 cm. Since the pawl is continuously pressed into the toothing by the spring when the working carriage is stationary and during an upward movement, a particularly short release delay of the braking device can be ensured. In particular, in the event of a cable break during an upward movement of the working carriage, this allows for a particularly reliable braking of the working carriage.

[0026] According to a particularly advantageous embodiment of the invention, an additional winch is provided on the excavation machine, wherein a winch cable is guided over an upper end of the mast and attached to the work carriage. The sensing device can be configured to detect the rotational speed of the winch of the lifting cable and the rotational speed of the additional winch. The control device is designed to activate the additional winch to brake and hold the work carriage against the mast, in particular by a controlled reduction of the rotational speed of the additional winch, upon detection of a speed difference or a change in the speed difference between the lifting winch and the additional winch.In other words, a cable break in the hoist cable can be detected by the speed difference or change in the speed difference between the auxiliary winch and the hoist winch. A significant advantage is that in the event of a hoist cable break, no additional damage occurs to the underground construction machine according to the invention, and only a few components, such as the auxiliary cable, need to be replaced. The auxiliary cable can preferably run from the auxiliary winch on the mast top to the mast head, where it is deflected by two pulleys, then retracts to the working carriage, and finally returns to the mast head.

[0027] The additional winch can be designed, in particular, as a winch with a multi-stage planetary gearbox or as a free-fall winch for quickly lowering the cable and is preferably mounted on the mast top, the mast head, the superstructure, or the work carriage. It is particularly advantageous if the additional winch is mounted centrally on the mast top. Alternatively, an additional safety cable can be attached to the hoist winch to hold the work carriage against the mast in the event of a hoist cable break. The additional safety cable is routed through the work carriage, and the braking device is designed to decelerate the downward movement with a brake on the additional safety cable if activated by the control unit. In this way, an additional winch can be dispensed with, thus implementing a relatively simple fall protection system.

[0028] One embodiment of the invention consists in the braking device being designed without an additional winch, using a cable and a spring-loaded drum. In the event of a detected cable break, the spring-loaded drum is braked, thus preventing the work carriage from falling. This allows the braking device to be implemented particularly simply and cost-effectively. A further particularly advantageous embodiment of the invention consists in the brake rail being designed with an L-shaped or T-shaped profile. This allows the work carriage to be braked particularly efficiently by the drum brake in the event of a cable break. It is advantageous for such a brake rail to be at least partially, preferably on two sides, encompassed by the drum brake to generate a clamping force.It is also advantageous if part of the brake rail protrudes perpendicularly to the mast with the L-shaped or T-shaped profile to generate a clamping force.

[0029] According to a particularly advantageous embodiment of the invention, the brake rail is designed as part of the mast profile or detachably attached to the mast. In principle, the brake rail can also serve as a guide for the vertical movement of the working carriage on the mast. The brake rail can, in particular, be designed as a square tube with a hollow profile having a rectangular cross-section. Alternatively, the brake rail can be designed with two square hollow profiles having a rectangular cross-section, welded together lengthwise. The resulting cross-section contains a web that can absorb high compressive forces with minimal weight. To withstand the highest possible loads, it is advantageous if at least a portion, particularly in a lower mast area, of the brake rail is designed as a solid profile.The brake rail can preferably be designed for attachment to existing civil engineering machines, for example with an additional welded connection. This allows the braking system according to the invention to be retrofitted to already manufactured civil engineering machines, thereby increasing safety.

[0030] According to one embodiment of the invention, it is particularly advantageous that the lifting cable is designed as an upper feed cable, wherein the upper feed cable runs around the mast at an upper end. The feed cable can, in particular, be designed as a wound wire rope and run around the mast via two deflection pulleys on a mast head. It is advantageous if the feed cable can be tensioned with a cable tensioning cylinder in order to achieve the necessary cable tension for operating the excavation machine according to the invention. In this way, the work carriage can be raised and lowered along the mast particularly efficiently, with the weight of the work carriage being supported essentially by the upper feed cable.

[0031] According to one embodiment of the invention, a lower feed cable is provided in addition to the upper feed cable. The lower feed cable encircles the guide at one lower end and is configured with the upper feed cable to generate a feed force for the working carriage. It is preferred that both the upper and lower feed cables are separate cables and are simply sheared onto the base carriage. This allows twice the cable force to be used as a feed force at the base carriage. Overall, this enables the generation of a particularly large feed force, for example, for creating a hole in the ground.

[0032] A preferred embodiment of the invention further consists in the detection device being designed to detect a drop in rope tension of the lower feed rope and / or the upper feed rope. This also allows for a particularly flexible and versatile arrangement of the detection device on the underground construction machine. The detection device can, in particular, also be designed as a force measuring axis of a deflection pulley, especially on a lower section of the mast or on the work carriage, to detect the rope tension. It is also preferred if the detection device for detecting rope tension is provided at one end of the lower feed rope, wherein the lower feed rope can be attached to a lower section of the mast of the underground construction machine according to the invention. Such a mounting of the detection device on the lower section of a mast simplifies the installation and maintenance of the detection device.

[0033] In general, the hoist rope, the upper feed rope, and the lower feed rope can be arranged on the excavation machine according to the invention in an adjustable manner, for example, using a hydraulic winch. However, it is particularly advantageous that a double-acting feed winch is provided on the excavation machine, wherein the upper and lower feed ropes are mounted on the feed winch in such a way that the upper feed rope can be unwound and the lower feed rope wound up with a single winding motion. This means that the double-acting feed winch simultaneously winds up one rope and unwinds the other, so that the overall rope tension remains constant.

[0034] The double-acting feed winch can be hydraulically operated and mounted on the rear of the mast or on a superstructure. By incorporating a double-acting feed winch, the design and cable routing of the inventive excavation machine, and in particular the detection of a cable break, can be simplified.

[0035] The method according to the invention is characterized in that at least one detection device is arranged which is designed to detect a break in the lifting rope, that at least one braking device is arranged which is designed to brake and hold the working carriage on the mast, and that a control device is provided and designed to activate the braking device and brake and / or stop the working carriage when a break in the lifting rope is detected by the detection device.

[0036] The method can be used in particular with the previously described underground construction machine according to the invention. The advantages described above can be achieved in this way. The invention is further explained below with reference to preferred embodiments, which are shown schematically in the drawings. The drawings show:

[0037] Fig. 1 shows a side view of a deep-construction machine according to the invention;

[0038] Fig. 2 shows a schematic circuit arrangement of a hydraulic control device according to the invention;

[0039] Fig. 3 shows a cross-sectional view of a braking device according to the invention;

[0040] Fig. 4 shows a perspective view of a braking device according to the invention; and

[0041] Fig. 5 shows a perspective view of a pilaster cross-section according to the invention.

[0042] A civil engineering machine 10 according to the invention, comprising a carrier unit 12, is shown in Fig. 1. The carrier unit 12 preferably comprises a crawler chassis as an undercarriage 14, on which a superstructure 16 can be rotatably mounted. Preferably, a control system, in particular a control device 60, for the civil engineering machine 10 can be located in an operator's cab of the superstructure 16. A mast 20, which can be designed as a boom 21 and can have a substantially vertical position during operation, can preferably be adjustably mounted on the superstructure 16 via a linkage mechanism 18. The boom 21 can also be directly connected to the superstructure 16, in particular via a joint (not shown) arranged in the lower region of the boom 21 and one or more actuating cylinders (not shown). It is also possible that, instead of the boom 21, an adjustable articulated arm (not shown) is adjustably arranged on the superstructure 16.

[0043] According to the illustrated embodiment, the mast 20 can preferably be designed as a mast 21 with a linear guide 24 on its front side. A work carriage 38 with a rotary drilling drive 36 can be mounted to be vertically movable along the linear guide 24. This allows the underground construction machine 10 to be configured as a drilling rig. The work carriage 38 can also be equipped with a vibrator (not shown) or a ram.

[0044] Figure 1 shows an exemplary middle position of the rotary drilling drive 36 and a lower position of the rotary drilling drive 36, indicated by dashed lines 24. The rotary drilling drive 36 can preferably be formed by a power rotary head with at least one further motor.

[0045] A lifting cable 40 can be guided over a mast head 22 at the upper end of the mast 20 or the mast 21. At one end of the lifting cable, the work carriage can preferably be provided for driving a telescopic Kelly bar 32 with an exemplary auger 34 to form a machining tool 30. The lifting cable 40 can be designed, in particular, for raising and lowering the work carriage 38. The Kelly bar 32 can preferably be guided on the work carriage 38 by a sleeve-shaped drive wheel of the rotary drilling drive 36, so that a torque can be transmitted from the rotary drilling drive 36 to the Kelly bar 32, for example, via drive strips (not shown). The auger 34 can be arranged at the lower end of the Kelly bar 32 for creating a borehole in the ground. The machining tool 30 can, in principle, be of any design and, in particular, may include an auger 34 or a drill bucket.

[0046] The lifting cable 40 can be guided from the work carriage 38 via pulleys 26 at the mast head 22 along the mast 20 to a lifting winch 46 on the mast 20 or mast 21. The lifting winch 46 is driven by a motor 50, in particular an electric motor or a hydraulic motor. The control system allows the at least one motor 50 to be controlled to operate the lifting winch 46. The lifting winch 46 raises and lowers the work carriage 38 by means of the lifting cable 40. A second lifting cable can also be provided, in which case the work carriage 38 can be pulled downwards by the second lifting cable. The lifting winch 46 can also be arranged on the superstructure 16.

[0047] Fig. 2 shows an exemplary hydraulic control device 88, wherein a single-acting brake cylinder 100 can be actuated by means of an electrically actuated 3 / 2-way valve 96 to decelerate and stop the work carriage 38. The hydraulic control device 88 can be designed, in particular, such that the brake is applied when the 3 / 2-way valve 96 is de-energized. It is particularly advantageous if an emergency release for opening the brake and, in particular, a reservoir 98 are provided on the 3 / 2-way valve 96. Preferably, a hydraulic pressure accumulator 94 is arranged, in particular directly on the work carriage 38, and the existing pressure can be monitored by means of a pressure sensor 92. The pressure accumulator 94 ensures, in particular, a particularly rapid application of the brake. Likewise, this makes it possible to actuate the hydraulic control device 88 even in the event of a failure of the hydraulic circuit of the excavation machine 10.

[0048] The hydraulic control device 88 can preferably be designed to fill the pressure accumulator 94 at a small flow rate, which can be taken directly from a bulkhead bolting plate on the work carriage 38. In this way, an additional hydraulic line to the work carriage 38 can be omitted.

[0049] Fig. 3 shows a schematic cross-sectional view of a braking device 80 according to the invention, wherein a shoe brake 82 for braking and stopping the working carriage 38 is mounted on a brake rail 84 on the working carriage 38, the shoe brake 82 engaging the brake rail 84. As shown in Fig. 3, the brake rail 84 is fixedly mounted to the outer frame of the mast 21, offset laterally from a linear guide 24 for guiding the working carriage 38. Similarly, an additional braking device with a brake rail and shoe brake can be arranged on an opposite side of the mast 21 (not shown here). In this way, particularly safe braking of the working carriage 38 can be achieved. The braking device 80 according to the invention can generally be closed and only opened by the control device 60 during a vertical movement of the working carriage 38.In this case, the braking device 80 can preferably open when no cable break has been detected by the detection device 55 and the pressure accumulator 94 is full, as soon as the lifting winch 46 is driven. Thus, with the braking device 80 generally closed, movement of the working carriage 38 can be prevented in the event of a cable break while stationary. If a cable break occurs during movement of the working carriage 38, the braking device 80 closes.

[0050] The braking device 80 can, in particular, comprise two individual brake calipers which can be arranged with a counter plate 86, wherein the inside of the counter plate 86 can be formed with a brake lining. It is particularly advantageous if the entire brake caliper is arranged in a floating manner. This allows the brake caliper to be moved when the linings of the brake caliper are pressed against the brake rail from both sides, so that the same pressure is exerted on the brake rail 84 from both sides.

[0051] Fig. 4 shows a perspective view of part of a mast 21 according to the invention, with a floating caliper 76 and a fixed caliper 78 shown for size comparison. The floating caliper 76 is arranged above the fixed caliper 78 on the mast 21 by way of example. It is provided that either the floating caliper 76 or the fixed caliper 78 is formed on the mast 21. The floating caliper 76 can, in particular, be designed as an industrial brake with a floating bearing to compensate for play in the mast guide. The fixed caliper 78 can preferably be designed as a brake caliper and be actuated mechanically, for example by means of a compression spring, pneumatically, or hydraulically to generate a clamping force.

[0052] Fig. 5 shows a perspective cross-sectional view of a mast 21 with a linear guide 24. As illustrated here, the linear guide 24 can, in particular, be designed as a brake rail 84 for braking the working carriage 38 (not shown). The mast profile 23 can preferably be formed from 5 welded sheets, with a square hollow profile being provided laterally as a guide rail 24 (and simultaneously as a brake rail 84). The brake rail 84 can, in particular, also be designed, at least partially, as a solid square profile, preferably in a lower region of the mast 21. In addition to the mast profile shown in Fig. 5, guides for simultaneously guiding and braking the working carriage 38 on the linear guide 24 shown in Fig. 5 can be provided on an associated working carriage 38 (not shown here), in particular in a lower or upper side region of the working carriage 38.The guides on the work carriage 38 can, in particular, encompass the linear guide 24, wherein two offset, opposing guide surfaces can be formed. Furthermore, the guides can be designed on at least one side with integrated hydraulic cylinders for braking the work carriage 38 against the linear guide 24.

Claims

& B 3910 PATENT CLAIMS 1 trenching machine (10) with a carrier device (12), a runner (21) which has a linear guide (24) for a working carriage (38) and is mounted on the carrier device (12), a working carriage (38) which is slidably guided along the mast (21), and a lifting rope (40) which is attached to the working carriage (38) for moving, in particular lifting, the working carriage (38) along the leader (21), characterized by , that at least one detection device (55) is arranged which is designed to detect a break in the lifting rope (40), that at least one braking device (80) is arranged which is designed to brake and hold the working carriage (38) on the mast (21), and that a control device (60) is provided and designed to activate the braking device (80) in order to slow down and / or stop the work carriage (38) in the event of a detected rope break of the lifting rope (40) by the detection device (55). Civil engineering machine (10) according to claim 1 , characterized by , that the detection device (55) is designed to detect a drop in the tension of the lifting rope (40).

3. Underground construction machine (10) according to claim 1 , characterized by , that the detection device (55) is designed to detect a force on the deflection rollers (26), in particular with a measuring pin, or to detect a force on the working carriage (38).

4. Civil engineering machine (10) according to one of claims 1 to 2, characterized by , that the detection device (55) is designed to detect the conductivity of the lifting rope (40).

5. Civil engineering machine (10) according to one of claims 1 to 2, characterized by , that the detection device (55) is designed to detect a pressure of a rope tensioning cylinder, wherein the rope tensioning cylinder is provided for adjusting a rope tension of the lifting rope (40).

6. Underground construction machine (10) according to one of claims 1 to 5, characterized by , that the control device (60) is designed electronically, mechanically, hydraulically and / or as part of a control system for the underground construction machine (10) for directly controlling the braking device (80).

7. Underground construction machine (10) according to one of claims 1 to 6, characterized by , that the civil engineering machine (10) is designed as a drilling rig, a pile driver, a vibrator, or a diaphragm wall machine, in particular a diaphragm wall cutter or a diaphragm wall grab, with at least one machining tool (30), wherein the at least one machining tool (30) is slidably mounted on the mast (21). Civil engineering machine (10) according to one of claims 1 to 7, characterized by , that the braking device (80) is designed with a single- or double-sided shoe brake (82), preferably hydraulically or pneumatically actuated, on the working carriage (38) to generate a clamping force on a brake rail (84), wherein the brake rail (84) runs parallel to the mast (21). Civil engineering machine (10) according to claim 8, characterized by , that the brake rail (84) is designed with an L-shaped or a T-shaped profile. Civil engineering machine (10) according to one of claims 8 to 9, characterized by , that the brake rail (84) is designed as part of the mast profile or detachably on the mast (21). Civil engineering machine (10) according to one of claims 1 to 10, characterized by , that the lifting rope (40) is designed as an upper feed rope, wherein the upper feed rope surrounds the mast (21) at an upper end. Civil engineering machine (10) according to claim 11 , characterized by , that a lower feed rope is provided for the upper feed rope, wherein the lower feed rope surrounds the guide (21) at a lower end and is configured with the upper feed rope to generate a feed force for the working carriage (38).

13. Underground construction machine (10) according to claim 12, characterized by , that the detection device (55) is designed to detect a drop in rope tension of the lower feed rope and / or the upper feed rope.

14. Civil engineering machine (10) according to one of claims 12 to 13, characterized by , that a double-acting feed winch is provided on the underground construction machine (10), wherein the upper feed rope and the lower feed rope are mounted on the feed winch in such a way that the upper feed rope can be unwound and the lower feed rope can be wound up with a winding movement.

15. Method for operating a civil engineering machine (10), in particular according to one of claims 1 to 14, with a carrier device (12), a runner (21) which has a linear guide (24) for a working carriage (38) and is mounted on the carrier device (12), a working carriage (38) which is slidably guided along the mast (21), and a lifting rope (40) which is attached to the working carriage (38) for moving, in particular lifting, the working carriage (38) along the leader (21), characterized by , that at least one detection device (55) is arranged which is designed to detect a break in the lifting rope (40), that at least one braking device (80) is arranged which is designed to brake and hold the working carriage (38) on the mast (21), and that a control device (60) is provided and designed, wherein, in the event of a detected rope break of the lifting rope (40) by the detection device (55), the control device (60) activates the braking device (80)-- 21 - fourth, and the work carriage (38) is braked and / or stopped.

Images