Soil treatment apparatus, working machine and kit
By arranging clamping elements and feeding devices on the short side of the frame of the diaphragm wall cutting machine, the problem of limited clamping device on soil deformation and feeding force is solved, realizing stable and efficient formation of soil trenches in hard substrates, and reducing material costs and quality risks.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LIEBHERR WERK NENZING
- Filing Date
- 2025-03-12
- Publication Date
- 2026-07-14
AI Technical Summary
When existing diaphragm wall cutting machines form soil trenches, the clamping device causes deformation of the surrounding soil due to the load, affecting stability and increasing concrete usage. Furthermore, the feed force is limited, making it difficult to effectively form secondary sheet piles in hard foundations.
Design a soil treatment device in which clamping elements of the frame are arranged on the short side. Through the clamping device and the feeding device, an additional feeding force can be generated on the soil treatment tool. The clamping elements contact the adjacent main piling on the short side of the frame to reduce the deformation of the surrounding land. The modular structure improves the guidance and control of the soil treatment tool.
It effectively reduced the deformation impact on the surrounding land, improved the feeding force, ensured the stability and accuracy of the soil treatment tool, reduced the negative impact on the surrounding structure, and reduced the amount of concrete used and material costs.
Smart Images
Figure CN224495258U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present utility model relates to a soil treatment device for land trenches, in particular a diaphragm wall cutting machine, and to a working machine for such a device. The present utility model also relates to a kit and a method for forming land trenches. BACKGROUND
[0002] The construction of a diaphragm wall is usually carried out by forming land trenches using a special soil treatment device and then filling the land trenches with concrete, wherein reinforcement cages can be inserted into the land trenches to stabilize the land trench walls. Specifically, diaphragm wall cutting machines or diaphragm wall grabs are used as soil treatment devices, which are suspended on a machine such as a mobile crane or a cable excavator. Diaphragm wall cutting machines have one or more cutting wheels as soil treatment tools, while diaphragm wall grabs usually have a double-jaw grab as a soil treatment tool. Diaphragm walls are usually constructed by successively producing adjacent diaphragm wall panels.
[0003] The so-called "Pilgerschritt" is usually used to produce diaphragm wall panels. In this process, so-called primary panels are first formed, which are not placed next to each other, but are kept at a distance from each other in the soil. An untouched piece of soil remains between these primary panels. After the primary panels have hardened to a stab-resistant state, connecting sections (so-called secondary panels) can be produced.
[0004] The distance between the primary panels is usually slightly smaller than the width of the secondary panels along their long sides (i.e. the secondary panels cannot fit completely into the space between the primary panels). Therefore, the secondary panels to be produced overlap the existing primary panels, i.e. there is an intersection in the hardened primary panels. The aim is to form an overall adhesive connection of the final reinforced concrete structure in the floor. Figure 1 An example of such an arrangement of diaphragm wall panels is shown in plan view in Fig. 1, in which a land trench for a secondary panel 2 to be built is arranged between two already completed primary panels 1, each of which is arranged offset at an angle to the land trench 2 and overlaps through its corner region (see area 3 in Fig. 1). This can be necessary, for example, when building a shaft (Schacht). The surrounding ground is marked with reference numeral 4. Figure 1
[0005] For example, this treatment method can be required if the diaphragm wall to be produced is subject to tightness requirements or if the desired strength of the structure requires it. To form this overlapping connection, a diaphragm wall cutting machine is used and its milling tool is used to form the intersection on the already solidified primary panel. However, this intersection cannot be too large, as it could damage the reinforcement of the poured concrete.
[0006] The underground diaphragm wall cutting machine exerts a force on the ground in the vertical direction, which is usually generated by its own weight. This so-called feed force is limited on the one hand by the maximum load of the working machine (carrier machine) on which the underground diaphragm wall cutting machine is suspended and on the other hand by the minimum feed force required to keep the underground diaphragm wall cutting machine vertical during the work process. The operator is usually not allowed to exceed a maximum contact force, which is less than the weight of the sliding cutting machine under the lift. This ensures that the underground diaphragm wall cutting machine itself is always realigned vertically in the event that the longitudinal axis of the underground diaphragm wall cutting machine gradually deviates from the vertical due to gravity. These designs also apply to underground diaphragm wall grabs.
[0007] In order to increase the feed force (for example when forming a land trench in hard soil), it is known from the prior art to equip the underground diaphragm wall cutting machine with clamping means in order to clamp it in the soil during the formation of the land trench. By means of the feed device, a downward force (feed force) is generated in the clamped state which exceeds the weight of the underground diaphragm wall cutting machine under the lift. The clamping means usually comprise outwardly extendable clamping elements which press against the inner wall of the land trench in order to clamp the underground diaphragm wall cutting machine. In the known devices, the clamping elements are arranged on the long sides of the usually box-shaped cutting machine frame.
[0008] The clamping of the underground diaphragm wall cutting machine to the surrounding land in the land trench leads to a series of problems and challenges. For example, the surrounding land must be sufficiently loadable to absorb the lateral contact forces of the clamping elements. The contact forces can cause permanent deformation of the surrounding land. The extent to which the surrounding land can be affected can only be predicted within limited ranges. For example, if the distance to existing structures such as foundations or underground traffic infrastructure is small, the resulting deformations can have a negative impact on their stability. Furthermore, this deformation increases the amount of concrete required for the underground diaphragm wall sheet piles, thereby increasing material costs. Finally, the varying thickness of the underground diaphragm wall sheet piles associated with the above-mentioned deformations can be a criterion for reduced quality, especially in the case of wall sheet piles that are visible in the finished building later on. SUMMARY
[0009] It is therefore an object of the present application to develop a soil treatment device and a method of the same type in an advantageous manner and to overcome the above-mentioned disadvantages. In particular, an efficient and at the same time land-friendly construction of an underground diaphragm wall should be achieved.
[0010] According to the application, this object is achieved by a soil treatment device according to one aspect of the application and by a method according to another aspect of the application. Advantageous embodiments of the application are other aspects.
[0011] The soil treatment device according to the utility model thus comprises a frame extending along a longitudinal axis, which frame has a rectangular cross section transverse to the longitudinal axis. In a freely suspended state on a working machine, the longitudinal axis can extend vertically. In the land trench, the longitudinal axis can be at an angle to the vertical, in particular in the event of unintentional or deliberate tilting of the soil treatment device. The soil treatment device can be connected to the working machine and can be suspended, for example, via a cable on a jib of a cable excavator or mobile crane. The soil treatment device is in particular a diaphragm wall cutter, but can also be configured, for example, as a diaphragm wall grab.
[0012] The soil treatment device further comprises a soil treatment tool arranged on a lower part of the frame, which soil treatment tool can comprise, for example, one or more cutting wheels or a grab, and a clamping device having at least two clamping elements arranged on opposite sides of the frame. The clamping elements can be actively adjusted, in particular retracted and extended, relative to the frame in order to press the clamping elements against the inner wall of the land trench and thus to clamp or anchor the frame in the land.
[0013] The soil treatment device further comprises a feed device for generating a feed force on the soil treatment tool within the land trench, by means of which feed force the clamping elements and the frame can be actively adjusted relative to one another along the longitudinal axis. If the frame is clamped in the land trench via the clamping device, the feed device can be used to generate a feed force that exceeds the weight force resulting from the self-weight of the soil treatment device and thus enables the land trench to be formed effectively in a hard base or during the production of a secondary sheet pile, which requires the adjacent primary sheet pile to be partially removed.
[0014] According to the utility model, the clamping elements are arranged on the short sides of the frame. These short sides are the sides of the frame that face the adjacent diaphragm wall sheet piles during the production of a diaphragm wall. Due to the advance of the soil treatment tool, which is arranged below the clamping device, a defined surface is formed on the short sides of the land trench. If the adjacent land is deformed as a result of the soil treatment tool being clamped in the land trench currently being formed, these deformations occur in the region of the diaphragm wall to be produced. This minimizes the influence of the production process on the land adjacent to the diaphragm wall.
[0015] According to the utility model, the arrangement of the clamping elements on the short sides of the frame is particularly advantageous when the land trench is produced in a step-by-step method, in particular when the land trench for a secondary sheet pile is produced. Here, the short sides of the land trench currently being produced are formed by the adjacent primary sheet piles. Since these sheet piles are already solidified, they can withstand greater loads than the surrounding land adjacent to the long sides of the frame in order to clamp the soil treatment device. The primary sheet piles are a defined and reliable clamping partner for the clamping elements.
[0016] By clamping the frame between adjacent main sheet piles, additional feed force can be applied effectively and gently via the feed device. This additional feed force is particularly advantageous in very hard soil when milling wheels of round shank milling tools or roller drill bits are used. In particular when shafts are produced, secondary sheet piles are usually produced at an angle to the main sheet piles. Therefore, the soil treatment tool usually does not find uniform conditions in the soil. The forces occurring can change greatly, even dramatically, over time. This results in forces on the soil treatment tool that can significantly influence its position in space.
[0017] Clamping the frame together with the main sheet piles via the clamping device ensures smooth guidance of the soil treatment tool, for example of the cutting wheel on a diaphragm wall cutting machine. As a result, the soil treatment device moves less erratically, which is particularly advantageous in the case of milling using a diaphragm wall cutting machine. Forced guidance of the soil treatment device or profile fit in the land trench improves the vertical guidance of the frame and thus the vertical course of the land trench can be better observed and controlled (and, if necessary, counteracted).
[0018] The clamping elements can comprise contact plates, the outer side of which contacts the inner wall of the land trench in the clamped state. The contact plates can have protrusions, such as tabs, teeth or the like, to achieve a more stable contact with the inner wall of the land trench.
[0019] The verticality of the soil treatment device can be controlled during clamping, preferably by means of control flaps (Steuerklappen) which are optionally installed on the frame and are known per se.
[0020] In one possible embodiment, it is envisaged that no clamping elements are arranged on the long sides of the frame. All clamping elements of the soil treatment device are arranged on the short sides of the frame.
[0021] In another possible embodiment it is provided that the clamping device comprises at least one clamping actuator by means of which the clamping elements can be actively adjusted relative to the frame. The at least one clamping actuator is preferably configured as a hydraulic cylinder. It is conceivable that opposite clamping elements can be adjusted via a shared clamping actuator. In a preferred embodiment, however, each clamping element is adjustable via at least one separate clamping actuator which is connected to the associated clamping element on the one hand and to the frame on the other hand. The clamping actuator can be connected to the clamping element and the frame in a hinged manner.
[0022] In another possible embodiment, the clamping elements can be adjusted transversely to the longitudinal axis. The clamping elements extend transversely to be clamped with the inner wall of the land trench. Alternatively or additionally, it can be provided that the clamping elements are linearly adjustable, i.e. can be retracted and extended linearly. The retraction and extension is carried out in particular by at least one, preferably a plurality of hydraulic cylinders (clamping actuators).
[0023] In another possible embodiment, it is provided that the clamping elements can be actively adjusted in their orientation relative to the longitudinal axis in order to influence the orientation of the soil treatment device relative to the land trench. In other words, the angular position of the clamping elements relative to the longitudinal axis can preferably be changed, thereby changing the alignment of the entire soil treatment device within the land trench. This can be necessary, for example, to correct deviations from the vertical or to deliberately deviate from the vertical.
[0024] In order to be able to actively adjust the orientation of the clamping elements relative to the longitudinal axis, in a preferred embodiment each clamping element can be adjusted via at least two clamping actuators, for example a first and a second hydraulic cylinder. The angular position of the respective clamping element can be changed by selectively controlling the clamping actuators.
[0025] In another possible embodiment, it is provided that the feed device comprises at least one feed actuator by means of which the frame can be displaced relative to the clamping elements in a state clamped in the land trench via the clamping elements. The at least one feed actuator is preferably configured as a hydraulic cylinder. The at least one feed actuator can always be aligned parallel to the longitudinal axis of the frame.
[0026] In particular, the soil treatment device does not have an intermediate frame on which the clamping elements are arranged and which, together with the clamping elements, is clamped in the land trench, wherein the remainder of the frame, including the soil treatment tool, can be adjusted relative to the clamped intermediate frame via the feed device. Conversely, the clamping elements are mounted on the frame so as to be adjustable, in particular displaceable, parallel to the longitudinal axis, so that in the clamped state the entire frame of the soil treatment device can be displaced relative to the clamping elements by means of the at least one feed actuator to generate the desired feed force. This results in a more compact design compared to solutions that require an additional intermediate frame.
[0027] In principle, it is conceivable to move the frame relative to the clamped clamping elements via a single feed actuator. However, in a preferred embodiment each clamping element is connected to the frame via a separate feed actuator, in particular in a hinged connection, and the frame is moved by actuating all feed actuators connected to the respective clamped clamping element.
[0028] Preferably, the at least one feeding actuator is arranged completely within the frame. This means that the feeding device is better protected from damage and stress.
[0029] In another possible embodiment it is provided that the frame has a modular structure and comprises a lower frame part, an upper frame part and a central frame part mounted between the lower frame part and the upper frame part.
[0030] In this case, the soil treatment tool is arranged on the lower frame part. In case the soil treatment device is a diaphragm wall cutter and the soil treatment tool comprises one or more cutting wheels, the lower frame part can comprise at least one drive unit and / or at least one transmission unit by means of which the at least one cutting wheel can be driven. Furthermore, the lower frame part can comprise at least one suction opening and a feeding pump connected to the suction opening for feeding excavated material produced by the soil treatment tool. The at least one suction opening can be formed on a suction box which is formed between the pair of cutting wheels.
[0031] The upper frame part can be connected to the working machine and for this purpose can comprise connecting elements on the upper side, for example a suspension cable of the working machine can be connected to the connecting elements in order to suspend the soil treatment device on a boom of the working machine. Alternatively or additionally, the upper frame part can have connections for connecting hydraulic and / or electric lines.
[0032] The frame parts can be detachably connected to each other via connecting elements, for example bolt connections, wherein the upper frame part and the lower frame part can be detachably connected to each other both directly and via the central frame part which can be arranged between the upper frame part and the lower frame part. In this way, the central frame part can be optionally mounted between the upper frame part and the lower frame part, thereby increasing the overall length of the frame or the soil treatment device. Alternatively, the central frame part can be removed and the upper frame part and the lower frame part are directly connected to each other, thus shortening the frame or the length of the soil treatment device. Therefore, components of the soil treatment device which are absolutely necessary for the soil treatment operation are preferably not located in the central frame part, but in the lower frame part and possibly also in the upper frame part.
[0033] The frame of the soil treatment device can have a modular structure as disclosed in EP 3 683 361 A1. The present application expressly refers to this teaching.
[0034] In another possible embodiment it is provided that the central frame part comprises a clamping device, i.e. clamping elements are arranged on the short sides of the central frame part. Alternatively or additionally, the central frame part can comprise a feeding device. Preferably, both the clamping device and the feeding device are placed completely in or on the central frame part. Preferably, the central frame part can comprise clamping and feeding actuators, and in particular corresponding hydraulic lines and possibly other hydraulic components.
[0035] This makes it possible to advantageously retrofit and disassemble the clamping and feeding device according to the utility model. Depending on the application or the soil conditions, another central frame part without these devices can be installed instead of a central frame part with clamping and / or feeding devices (or the soil treatment device can be used without a central frame part). Instead of having to maintain a plurality of different soil treatment devices (for example, a plurality of diaphragm wall cutters), a single device with one, two or more different central frame parts can be used, which reduces the investment costs.
[0036] As mentioned above, the use of a central frame part with integrated clamping and / or feeding devices improves the quality of the trench formation, since the drift of the soil treatment device perpendicular to the diaphragm wall plane can be better detected and thus reduced. When installing the central frame part, the size of the intersection of the main board piles can also be better controlled and influenced. This reduces the risk of excessive damage / wear of the soil treatment tool caused by the reinforcement.
[0037] In another possible embodiment, it is envisaged that the clamping device comprises at least two clamping elements on each short side of the frame. These clamping elements can be arranged overlapping on each side. Overall, the clamping device can thus comprise at least four clamping elements. The clamping elements can preferably be actuated alternately via the feeding device, so that a feeding force can be generated by means of a first feeding actuator by clamping via a first pair of opposing clamping elements (e.g. upper clamping elements), while a second pair of opposing clamping elements (e.g. lower clamping elements) is moved freely relative to the frame by means of a second feeding actuator. This allows a continuous feeding force to be generated along the longitudinal axis, since the clamping elements are activated alternately on each side and thus one clamping element is active at a time ("Milkbewegung").
[0038] Each clamping element is preferably connected to the frame via a feeding actuator. In order to generate the feeding force, the feeding actuator of the clamping clamping element can be extended (pressing the soil treatment tool down), while the "inactive" clamping element is brought into position for the next clamping phase by retracting the feeding actuator. This process is then repeated for the other pair of clamping elements.
[0039] In another possible embodiment, the clamping elements are adjustable via separate clamping actuators, and the clamping elements are mounted such that they can be moved directly or indirectly in guide elements of the frame which extend parallel to the longitudinal axis. The clamping actuators are preferably supported directly or indirectly on the guide elements in order to press the clamping elements against the inner wall of the land trench. This results in a compact structure and at the same time results in a defined guidance of the clamping elements or the frame relative to the clamped trench.
[0040] In another possible embodiment it is provided that a slide is displaceably mounted in the above-mentioned guide elements, to which the clamping actuators are in turn connected, in particular in a hinged manner, in order to be supported thereon in order to generate the lateral contact pressure. Preferably, the feed actuator is connected, in particular in a hinged manner, to the slide.
[0041] The utility model also relates to a working machine with a soil treatment device according to the utility model. The working machine can be a cable excavator, but also for example a mobile crane or a hydraulic excavator. The working machine can comprise for example a mobile chassis with caterpillar drive, and an upper structure mounted on the chassis so as to be rotatable about a vertical axis, which upper structure has a pivotable jib. The soil treatment device can be suspended on the working machine via a suspension cable, for example a suspension cable being guided via one or more deflection pulleys at the end of the jib to a suspension cable winch on the upper structure. The soil treatment device is preferably a diaphragm wall cutter.
[0042] The utility model also relates to a set comprising a soil treatment device according to the utility model, which frame has a modular structure as described above, and at least one further central frame part, which can optionally be mounted between the upper frame part and the lower frame part instead of the central frame part comprising the clamping device and / or the feed device. This results in the features and advantages described above in this respect. The at least one further central frame part can comprise neither a clamping device nor a feed device. Alternatively or additionally, the at least one further central frame part can have a differently configured clamping device, for example two clamping elements on each side instead of only one clamping element on each side, or a design for a greater / smaller feed force.
[0043] This invention also relates to a method for forming land trenches using a soil treatment device according to this invention. In this case, the soil treatment device is preferably configured as a diaphragm wall cutter. In this method, two spaced-apart diaphragm wall sheet piles (main sheet piles) are first produced. This is specifically accomplished by forming two land trenches using the same soil treatment device and then filling them with concrete. Reinforcing cages can be used for this purpose. The distance between the main sheet piles is preferably chosen to be less than the width of the secondary sheet piles produced between the main sheet piles along their long sides. This means that portions of the main sheet piles must be removed, particularly milled, to produce the secondary sheet piles.
[0044] Subsequently, particularly after the concrete of the main sheet piles has hardened, soil treatment equipment is used to form trenches connecting the main sheet piles by milling or excavation. Preferably, the overlapping edges of the main sheet piles are also milled off. During trench formation, a feed force is generated by means of a feeding device, while the clamping elements of the clamping device are supported on adjacent diaphragm wall sheet piles. This is possible because they are arranged on the short side of the frame of the soil treatment equipment facing the main sheet piles, rather than on the long side of the frame facing the land.
[0045] The contact pressure applied by the clamping element (generated by at least one clamping actuator) can preferably be controlled independently of the feed force (generated by at least one feed actuator). For this purpose, the soil treatment equipment preferably includes at least one control unit that controls the aforementioned actuators. Attached Figure Description
[0046] Further features, details, and advantages of this invention are shown in the exemplary embodiments explained below with reference to the accompanying drawings, wherein:
[0047] Figure 1 : A schematic top view showing the soil trench for the secondary sheet piles arranged between two main sheet piles;
[0048] Figure 2 : Shown according to Figure 1 A top view of an exemplary embodiment of the soil treatment device according to the present invention within a land trench;
[0049] Figure 3 : Showing the passage according to Figure 2 A side cross-sectional view of the soil treatment equipment;
[0050] Figure 4 : An enlarged view of the clamping and feeding device of the soil treatment equipment, shown in side cross-section; and
[0051] Figure 5 : This shows the clamping and feeding device, in which the frame moves downward. Detailed Implementation
[0052] Figure 1 A schematic top view of the land trench 2 is shown, which is arranged between two previously manufactured main panel piles 1 and has been explained in the introduction of the description. An overlap region 3 can be seen, which arises due to the fact that the main panel piles 1 are arranged at an angle to the land trench 2 and also at a smaller distance than the width of the land trench 2.
[0053] Figures 2 to 5 A preferred exemplary embodiment of a soil treatment device 10 according to the utility model is shown, which is configured here as a diaphragm wall cutting machine and is located in the land trench 2, which is arranged as Figure 1 shown. However, the utility model is not limited to a diaphragm wall cutting machine and the arrangement of the diaphragm wall panel piles shown, for example, a diaphragm wall grab can also be used.
[0054] Figure 2 A top view of the diaphragm wall cutting machine 10 is shown, while Figure 3 a side cross-sectional view along the dashed line in Figure 2 is shown. The diaphragm wall cutting machine 10 has a frame 14, also referred to as a cutting machine frame, which has a box-like structure with a rectangular cross-section in the top view, i.e. transverse to its longitudinal axis, see Figure 3 , and carries a soil treatment tool 15 at its lower end. In the exemplary embodiment shown here, the soil treatment tool comprises a plurality of cutting wheels 16, for example two pairs of cutting wheels 16 arranged next to each other. These cutting wheels can be driven via a drive shield located on the underside of the frame 14. The diaphragm wall cutting machine 10 can be attached to a working machine, for example to the jib of a cable excavator (not shown), via a suspension cable (not shown) and can be raised and lowered via this cable.
[0055] As can be seen in Figure 1 and Figure 2 , the end portion of the main panel pile 1 that overlaps the land trench 2 is milled away to form the land trench 2 for the secondary panel pile to be produced, so that two flat side walls facing the short sides 14a of the frame 14 are formed, which form stable, load-bearing inner walls of the land trench 2. Figure 3 The longitudinal axis 19 of the diaphragm wall cutting machine 10 is shown, which extends vertically in the free-hanging state or when forming the vertical land trench 2.
[0056] The diaphragm wall cutting machine 10 has a clamping device 20 and a feed device 30, which interact in such a way that a feed force can be generated in a targeted manner within the land trench 2, which acts on the milling tool 15, thus supporting the milling of the land trench 2 and the edge region of the main panel pile 1.Figures 4 to 5 The clamping device 20 and the feeding device 30 are shown in more detail below.
[0057] The clamping device 20 includes a plurality of clamping elements 22 (one clamping element 22 on each side in the illustrated exemplary embodiment, although two clamping elements 22 on each side are also conceivable) arranged on the short side of the frame 14. Preferably, there are no clamping elements on the long side 14b of the frame 14. In this exemplary embodiment, the clamping elements 22 are configured as contact plates that can be laterally moved outward via clamping actuators 24, i.e., extended. The extension is preferably linear and, in particular, perpendicular to the longitudinal axis 19. The clamping actuators 24 are specifically configured as hydraulic cylinders (clamping cylinders) that press the clamping elements 22 outward by extending a piston rod. Two clamping actuators 24 may be provided for each clamping element 22.
[0058] By extending the clamping elements 22, they can be pressed against the inner wall of the soil trench 2, thereby clamping the frame 14 within the soil trench 2. In the illustrated application, the clamping elements 22 are pressed against the milled wall of the adjacent main piling 1, providing a stable, load-bearing clamping fit. This prevents deformation of the surrounding soil 4 and avoids the aforementioned disadvantages.
[0059] Clamping elements 22 are mounted on frame 14 such that they can move parallel to longitudinal axis 19 and are connected to frame 14 via feed actuator 32 of feed device 30. Feed actuator 32 can be configured as a hydraulic cylinder (feed cylinder). In the clamped state, the entire frame 14 can be pressed downward along the direction of the trench by actuating feed actuator 32, thereby generating a feed force. Then the clamping elements 22 are retracted again, feed actuator 32 is moved to the starting position, and the process is restarted from the beginning.
[0060] like Figures 4 to 5 As shown in the exemplary embodiment, the frame 14 may have two guide elements 35 or rails extending parallel to the longitudinal axis 19, with a slider 36 displaceably mounted on or in each guide element or rail. A clamping actuator 24 may be supported on the slider 36, thereby supporting the guide elements 35 (and thus simultaneously on the frame 14), to generate the contact pressure required to press the clamping element 22 against the inner wall of the trench 2. A feed actuator 32 may be connected to the slider 36 and to the frame 14. In the illustrated exemplary embodiment, the feed actuator 32 is always aligned parallel to the longitudinal axis 19 and is hingedly connected to a first connecting element 34 of the frame 14 and hingedly connected to a second connecting element 37 of the slider 36.
[0061] Figure 5The clamping elements 22 are shown in a clamped state, wherein the feed actuator 32 is retracted. By extending the feed actuator 32 (see Figure 4 ), the frame 14 is moved downwards. In the process, the slide 36 is moved upwards along the guide element 35. The guide element 35 can have a lower and an upper mechanical stop for the slide 36 to limit the travel path.
[0062] In the exemplary embodiment shown, the slide 36 and the feed actuator 32 are completely arranged within the frame 14, thus being protected from the adverse conditions in the ground trench.
[0063] As shown in Figure 3 , the frame 14 can have a modular structure and comprise, for example, a lower frame portion 11, a central frame portion 12 and an upper frame portion 13, which are detachably connected to one another via connection elements, not shown in detail. The lower frame portion carries the cutting wheel 16 and can comprise, for example, a transmission shroud, a suction box with suction openings and a feed pump. The upper frame portion 13 can comprise holding elements for connecting to support cables of a working machine.
[0064] Preferably, all components of the clamping device 20 and the feed device 30 are arranged in or on the central frame portion 12 (see Figures 4 to 5 ). This makes it possible to operate the diaphragm wall cutting machine 10 without using the clamping and feed devices 20, 30 if necessary, and the central frame portion 12 can be removed (in which case another central frame portion can be installed as an extension or with a different function, or the lower frame portion 11 and the upper frame portion 13 can be directly connected to one another). Alternatively, the clamping and feed devices 20, 30 can be arranged in the lower frame portion 11, in the upper frame portion 13 or distributed among a plurality of frame portions 11, 12, 13.
[0065] Preferably, each clamping element 22 can be actuated via at least two clamping actuators 24, so that the orientation of the clamping element 22 relative to the frame 14 can be changed. Thus, the alignment of the diaphragm wall cutting machine 10 and the resulting feed direction of the feed actuator 32 can advantageously be adjusted independently of the verticality of the clamping partner (ground 4, main sheet pile 1).
[0066] The diaphragm wall cutting machine 10 can optionally have additional control flaps to be able to influence the inclination of the diaphragm wall cutting machine 10. The control flaps can be arranged on the long sides 14a and / or the short sides 14b of the frame 14.
[0067] List of reference signs:
[0068] 1 main sheet pile
[0069] 2 ground trench
[0070] 3 land trench overlap area with main board pile
[0071] 4 land
[0072] 10 soil treatment apparatus (underground continuous wall cutting machine)
[0073] 11 lower frame portion
[0074] 12 central frame portion
[0075] 13 upper frame portion
[0076] 14 frame
[0077] 14a short side
[0078] 14b long side
[0079] 15 soil treatment tool
[0080] 16 cutting wheel
[0081] 19 longitudinal axis
[0082] 20 clamping device
[0083] 22 clamping element
[0084] 24 clamping actuator
[0085] 30 feed device
[0086] 32 feed actuator
[0087] 34 first connecting element
[0088] 35 guide element
[0089] 36 slide
[0090] 37 second connecting element
Claims
1. A soil treatment device (10) for forming land trenches (2), the soil treatment device being connectable to working machinery, the soil treatment device comprising: A frame (14) extending along a longitudinal axis (19) having a rectangular cross-section transverse to the longitudinal axis (19); a soil treatment tool (15) disposed on the lower part of the frame (14); a clamping device (20) having at least two clamping elements (22) disposed on opposite sides of the frame (14), the at least two clamping elements being actively adjustable relative to the frame (14) to press the clamping elements (22) against the inner wall of the land trench (2); and a feeding device (30) for generating a feeding force on the soil treatment tool (15) within the land trench (2), by means of which the clamping elements (22) and the frame (14) are actively adjustable relative to each other along the longitudinal axis (19). Its features are, The clamping element (22) is arranged on the short side (14a) of the frame (14).
2. The soil treatment device (10) according to claim 1, wherein no clamping element (22) is arranged on the long side (14b) of the frame (14).
3. The soil treatment apparatus (10) according to claim 1 or 2, wherein the clamping device (20) includes at least one clamping actuator (24) configured as a hydraulic cylinder, by means of which the clamping element (22) is actively adjustable relative to the frame (14), wherein each clamping element (22) is adjustable via at least one separate clamping actuator (24) connected to the associated clamping element (22) and connected to the frame (14).
4. The soil treatment device (10) according to claim 3, wherein the clamping actuator is hinged to the associated clamping element (22) and connected to the frame (14).
5. The soil treatment device (10) according to claim 1, wherein the clamping element (22) is adjustable transversely to the longitudinal axis (19) and / or is adjustable linearly.
6. The soil treatment device (10) according to claim 1, wherein the clamping element (22) can be actively adjusted in its orientation relative to the longitudinal axis (19) to affect the orientation of the soil treatment device (10) relative to the land trench (2).
7. The soil treatment apparatus (10) according to claim 1, wherein the feeding device (30) includes at least one feeding actuator (32) configured as a hydraulic cylinder by means of which the frame (14) is able to be displaced relative to the clamping element (22) while it is clamped in the soil trench (2) by means of the clamping element (22), wherein each clamping element (22) is connected to the frame (14) via a separate feeding actuator (32).
8. The soil treatment apparatus (10) according to claim 7, wherein each clamping element (22) is hinged to the frame (14) via a separate feed actuator (32).
9. The soil treatment device (10) according to claim 1, wherein the frame (14) comprises a modular structure and has a lower frame portion (11) supporting the soil treatment tool (15), an upper frame portion (13) connectable to the working machinery, and a central frame portion (12) mounted between the lower frame portion and the upper frame portion, wherein the lower frame portion (11), the upper frame portion (13), and the central frame portion (12) are all detachably connected to each other via connecting elements, wherein the upper frame portion (13) and the lower frame portion (11) are detachably connected to each other both directly and detachably via the central frame portion (12) disposed between the upper frame portion (13) and the lower frame portion (11).
10. The soil treatment apparatus (10) according to claim 9, wherein the central frame portion (12) includes the clamping device (20) and / or the feeding device (30).
11. The soil treatment apparatus (10) according to claim 7, wherein the clamping device (20) comprises at least two clamping elements (22) on each short side of the frame (14), the clamping elements being arranged in an overlapping manner, and the clamping elements being alternately actuated by the feeding device (30) such that a feeding force is generated by means of a first feeding actuator (32) by means of clamping via a first pair of opposing clamping elements (22), while a second pair of opposing clamping elements (22) are free to move relative to the frame (14) by means of a second feeding actuator (32).
12. The soil treatment apparatus (10) according to claim 3, wherein the clamping element (22) is adjustable by a separate clamping actuator (24), and the clamping element (22) is mounted such that it is movable in a guide element (35) of the frame (14) extending parallel to the longitudinal axis (19), wherein the clamping actuator (24) is supported on the guide element (35) to press the clamping element (22) against the inner wall of the soil trench (2).
13. The soil treatment apparatus (10) according to claim 12, wherein a sliding member (36) is displaceably mounted in the guiding element (35), the feeding device (30) includes at least one feeding actuator (32) configured as a hydraulic cylinder by means of which the frame (14) is displaced relative to the clamping element (22) while it is clamped in the soil trench (2) by means of the clamping element (22), wherein each clamping element (22) is connected to the frame (14) via a separate feeding actuator (32), and the sliding member is connected to the clamping actuator (24) and also to the feeding actuator (32).
14. The soil treatment device (10) according to claim 13, wherein the slider is hinged to the clamping actuator (24) and also to the feed actuator (32).
15. The soil treatment device (10) according to claim 1, wherein the soil treatment device (10) is designed as a diaphragm wall cutter and the soil treatment tool (15) includes at least one cutting wheel (16).
16. A working machine having a soil treatment device (10) according to any one of the preceding claims, wherein the soil treatment device (10) is designed as a diaphragm wall cutter.
17. The working machine according to claim 16, wherein the working machine is designed as a cable excavator.
18. A kit comprising at least the soil treatment device (10) according to claim 9 or 10 and at least one additional central frame portion, the at least one additional central frame portion being optionally installed between the upper frame portion (13) and the lower frame portion (11) replacing the central frame portion (12) including the clamping device (20) and / or the feeding device (30), wherein the at least one additional central frame portion does not have a clamping device or has a clamping device with a different configuration.