EP2735650A1 - Method for treating layers, and its auxiliary construction machine - Google Patents
Method for treating layers, and its auxiliary construction machine Download PDFInfo
- Publication number
- EP2735650A1 EP2735650A1 EP13189033.7A EP13189033A EP2735650A1 EP 2735650 A1 EP2735650 A1 EP 2735650A1 EP 13189033 A EP13189033 A EP 13189033A EP 2735650 A1 EP2735650 A1 EP 2735650A1
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- EP
- European Patent Office
- Prior art keywords
- milling
- binder
- amount
- mixing
- milled
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000010276 construction Methods 0.000 title claims abstract description 16
- 238000003801 milling Methods 0.000 claims abstract description 101
- 238000002156 mixing Methods 0.000 claims abstract description 88
- 239000011230 binding agent Substances 0.000 claims abstract description 83
- 239000000463 material Substances 0.000 claims abstract description 54
- 238000005520 cutting process Methods 0.000 claims abstract description 10
- 239000003381 stabilizer Substances 0.000 claims abstract description 9
- 239000002689 soil Substances 0.000 claims description 16
- 230000035515 penetration Effects 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000000654 additive Substances 0.000 claims description 5
- 230000010354 integration Effects 0.000 claims 1
- 238000002347 injection Methods 0.000 description 12
- 239000007924 injection Substances 0.000 description 12
- 239000000725 suspension Substances 0.000 description 6
- 239000010426 asphalt Substances 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 230000006641 stabilisation Effects 0.000 description 4
- 238000011105 stabilization Methods 0.000 description 4
- 238000012805 post-processing Methods 0.000 description 3
- 239000003583 soil stabilizing agent Substances 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C21/00—Apparatus or processes for surface soil stabilisation for road building or like purposes, e.g. mixing local aggregate with binder
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/065—Recycling in place or on the road, i.e. hot or cold reprocessing of paving in situ or on the traffic surface, with or without adding virgin material or lifting of salvaged material; Repairs or resurfacing involving at least partial reprocessing of the existing paving
Definitions
- the invention relates to a method for treating layers, and to a construction machine or cultivation machine, in particular a soil stabilizer or recycler, according to the preamble of claim 1, 8 or 9.
- Layers are understood to mean asphalt layers, such as the top layer or base layer of a traffic area, unbound rock layers and soils.
- Such construction machines are used for material processing, namely z.
- the stabilization of insufficiently viable soil the pulverization of asphalt blankets to the recycling, or solidification of bound or unbound layers needed.
- Known stabilizer or recycler have a roller housing in which a milling / mixing roller is arranged, as well as a unit for dispensing and dosing of soil stabilizer.
- the circulating in a mixing chamber milling / mixing roller is arranged to adjust to the surface to be machined usually height and tilt adjustable.
- Such machines are often used for soil stabilization.
- pulverulent binders for example lime or cement, water and / or additives
- Typical applications for soil stabilization are the construction of roads or railway tracks as well as industrial areas.
- Cement can also be added as a suspension (dissolved in water) for dust-free addition.
- this method is only applicable if additional water is to be introduced into the soil. For soils with already too high water content, this method is not suitable.
- bitumen, bituminous solutions or additives are used to increase the load bearing capacity of soils.
- these binders e.g. bituminous solutions, foam bitumen or suspensions and / or additives and / or water are mixed in the stabilization process with the milled material.
- the amount of binder to be mixed results from site-specific requirements and is usually given in percent by weight in relation to the milled material to be treated (for example, 1% admixture of binder corresponds to 10 kg of binder per t of milled material).
- the metering of the binders takes place in the prior art via a metering device which adapts the actual amount of binder introduced to the current operating state of the machine. For this purpose, the amount of material being milled is recorded per unit of time during operation on the basis of the milling width, milling depth and feed rate. Based on this value can then be done the dosage of the binder.
- a weight-dependent dosage of the binder takes place on the basis of a measurement of the volume flow and on the basis of the known density of the binder.
- the metering width is set for the binder and the determination of the milled Fräsgutmenge, which is to be mixed with binder, is not based on the milling width, but based on the set activated dosing.
- a disadvantage of the prior art is that for the piecing process of the milling / mixing roller at the beginning of processing no proportionally metered admixture of the binder can take place.
- the pumps used in the prior art for the promotion of the binder are not adjustable from a value 0 to a desired flow rate. Therefore, as a rule, there can be no continuous increase in the delivery rate in the course of the piecing process.
- the object of the invention is therefore to provide a method for consolidating layers or a construction machine, which make it possible to avoid the need for post-processing of the work result.
- the invention advantageously provides that, during the piecing process, the determination of at least the amount of binder currently to be fed is carried out until the predetermined milling depth has been reached, depending essentially on the amount of milled material currently being milled in the mixing chamber.
- This has the advantage that the predetermined mixing ratio between binder and milled material can be substantially maintained even in the preparation phase and a homogeneous soil consolidation in the entire machined area can be achieved.
- binder is to be understood as meaning binders, as well as water and / or additives.
- the amount of milled material currently in the mixing chamber is determined at least as a function of the current milling depth of the milling / mixing roller.
- the amount of material currently in the mixing chamber is determined at least as a function of the current penetration speed of the milling / mixing roller in the layer.
- the change in the cutting depth is measured, in order to conclude on the changing amount of milled material in the mixing chamber.
- the determination of the amount of milled material located in the mixing chamber is determined by the measurement of the milling depth and in dependence on the radius and the width of the milling / mixing roller or dosing width.
- the metering width of the milling / mixing roller is the part that is engaged with the not yet treated layer.
- a metering device for example in the form of a metering strip with a plurality of injection nozzles arranged side by side, is switched on only in the area of the metering width.
- the change in the milling depth can be used to calculate the change in the quantity of binders currently to be supplied.
- the change in the milling depth is due to the penetration rate.
- the amount of milled material currently present in the mixing chamber is calculated.
- the integrated amount of binder added should be proportional to the integrated amount of milled material in the mixing chamber.
- the injection of binder is started, or that if a sufficient amount of milled material is present in the mixing space, a continuous injection with variable flow rate of binder is started.
- the depth of cut can be determined at a specific time; This milling depth can, due to the given geometry of the milling drum, be assigned to the volume existing at the time in the mixing chamber.
- the current milling depth can be measured directly.
- control of the amount of binder can be carried out in a conventional manner depending on the milling width, the predetermined cutting depth and the current feed rate with the known from the prior art method.
- a construction machine in which the control device controls the currently supplied amount of binder before reaching the predetermined milling depth depending on the currently located in the mixing chamber amount of milled material.
- control device determines the amount of material currently in the mixing chamber at least as a function of the penetration rate of the milling / mixing roller in the soil layer and controls the dosage of the binder proportionally.
- the density values of different layers to be processed and the binder to be used are stored in a database of the controller or the control device.
- Fig. 1 shows a schematic representation of the essential components of a self-propelled stabilizer or Recyclers.
- the construction machine has a machine frame 1, which is supported by a chassis.
- the chassis has two front wheels 4 in the working direction 9 and two rear wheels 3 in the working direction, which are attached to the front and rear lifting columns 6.5.
- the front and rear lifting columns 6.5 which can each be operated independently of each other, are in turn attached to the machine frame 1, so that the machine frame relative to the bottom layer 2 can be adjusted in height.
- wheels 3,4 and drives such as track drives can be provided.
- Fig. 1 shows the machine for working lanes with a chassis supported by a machine frame 1 and consisting of a cab 20 control station.
- the trolleys have at the front and rear ends of the machine frame 1, two jointly or optionally individually steerable suspension axles, in which each wheel is provided with its own hydraulic drive in the form of a hydraulic motor and may optionally be controlled separately.
- Each wheel is provided with a height adjustment 5.6, so that the height of the machine frame 1 and, if necessary, whose inclination is set exactly at working or transport height.
- a roller housing 7 is fixed, which limits a serving as a mixing chamber 10 working space of a rotating milling / mixing roller 8.
- Fig. 2 schematically shows the milling / mixing roller 8 with the surrounding mixing chamber 10 under the roller housing 7.
- the milling / mixing roller 8 is in Fig. 2 shown in continuous operation in which the dosage of the binder by means of a metering device 16 is carried out in a conventional manner, namely as a function of the propelling speed. Shown is therefore the situation in which the milling drum 8 is already in the predetermined milling depth FT.
- Fig. 3a shows a surface to be machined in plan view, in which the construction machine has machined the layer 2 in a plurality of parallel mutually parallel milling tracks, because the milling width FB of the milling / mixing roller 8 is less than the width of the surface to be machined. This results in both working direction 9 and transversely thereto several Ansetzbecke 22 in which the milling / mixing roller 8 has been lowered from its rest position to the desired depth of cut FT.
- Fig. 4a shows the cutting circle 15 with the radius r of the milling / mixing roller 8 during the piecing process, in which the milling / mixing roller 8 is first lowered to the predetermined milling depth FT. During the piecing process, preferably no movement of the construction machine in the advancing direction 9 takes place.
- the amount of material to be milled per unit of time must also be included in the calculation of the amount of material to be milled in the mixing space 10, which amount of material additionally enters the mixing space 10 due to the speed of advance.
- A denotes the cross-sectional area of the circular section currently located in the layer 2, which is defined by the milling depth FT and the diameter of the milling / mixing roller 8, d. H. the radius r of the cutting circle 15 is predetermined.
- the volume can be calculated from the product of milling width FB (or metering width FB ') and cross-sectional area A.
- the binder dosage is not constant and must be constantly adjusted depending on the milling depth.
- V / t the milled volume per unit time
- D the density of the milled material.
- V / t FT * FB * v
- the metering device 16 with the aid of which the binder is supplied, is controlled by a control device 14.
- the control device 14 may be part of a machine control 12, with which the travel drive of the construction machine and the drive of the milling / mixing roller 8 is controlled.
- the density values D of different layers 2 to be processed and the binders to be used are preferably stored in a database 18 of the controller 12 or the controller 14.
- Fig. 4b it may happen that the milling / mixing roller 8 overlaps with an already milled milling track, so that the milling / mixing roller 8 is only partially engaged with a not yet treated layer 2.
- the injection nozzles 24 of the metering device 16 are activated, but only those injection nozzles 24 which are located within the active metering width FB 'of the milling / mixing roller 8.
- the consideration of the active metering width FB ' allows a correct metering of the binder, even in the case of overlapping milling tracks.
- the milling width FB in the formulas can be replaced by the effective metering width FB 'to correctly calculate the amount of binder.
- the pump When activated, the pump has a minimum delivery of binder of a volume equal to 20 kg.
- variable flow rate binders can begin.
- the continuous introduction of the binder can be effected as a function of the feed rate v according to the method known from the prior art.
- cultivators can use the described method. These are not self-propelled attachments that are moved by a tractor, for example.
- An example of such an attachment stabilizer is the Wirtgen WS 250 machine.
- the dosage of the binder such as a suspension, not by the stabilizer itself, but z. B. by an anticipated suspension mixing plant, as it is known for example as Wirtgen suspension mixing plant WM 1000.
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Road Repair (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Accessories For Mixers (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Behandeln von Schichten, sowie eine Baumaschine oder Anbaumaschine, insbesondere einen Bodenstabilisierer oder Recycler, nach dem Oberbegriff des Anspruchs 1, 8 oder 9.The invention relates to a method for treating layers, and to a construction machine or cultivation machine, in particular a soil stabilizer or recycler, according to the preamble of
Unter Schichten werden dabei Asphaltschichten, wie zum Beispiel die Deckschicht oder Tragschicht einer Verkehrsfläche, ungebundene Gesteinsschichten und Böden verstanden.Layers are understood to mean asphalt layers, such as the top layer or base layer of a traffic area, unbound rock layers and soils.
Derartige Baumaschinen werden für die Materialaufbereitung, nämlich z. B. das Stabilisieren ungenügend tragfähiger Böden, das Pulverisieren von Asphaltdecken bis hin zum Recyclen, bzw. Verfestigen von gebundenen oder ungebundenen Schichten benötigt.Such construction machines are used for material processing, namely z. As the stabilization of insufficiently viable soil, the pulverization of asphalt blankets to the recycling, or solidification of bound or unbound layers needed.
Bekannte Stabilisierer oder Recycler weisen ein Walzengehäuse auf, in dem eine Fräs-/Mischwalze angeordnet ist, sowie eine Einheit zum Ausbringen und Dosieren von Bindemittel für die Bodenstabilisierung.Known stabilizer or recycler have a roller housing in which a milling / mixing roller is arranged, as well as a unit for dispensing and dosing of soil stabilizer.
Die in einem Mischraum umlaufende Fräs-/Mischwalze ist zur Anpassung an die zu bearbeitende Oberfläche in der Regel höhen- und neigungsverstellbar angeordnet.The circulating in a mixing chamber milling / mixing roller is arranged to adjust to the surface to be machined usually height and tilt adjustable.
In diesem Mischraum finden, abhängig von der jeweilige Anwendung, die notwendigen Prozesse statt, wie z.B. Ablösen und Zerkleinern der aufgefrästen Schichten, Zugabe von Bindemitteln, Vermischen und Homogenisieren von zugesetzten Materialien usw.In this mixing room, depending on the particular application, the necessary processes take place, e.g. Peeling and crushing the milled layers, adding binders, blending and homogenizing added materials, etc.
Solche Maschinen werden häufig zur Bodenstabilisierung eingesetzt.Such machines are often used for soil stabilization.
Zur Verbesserung oder Verfestigung von Böden ist es bekannt, pulverförmige Bindemittel, beispielsweise Kalk oder Zement, Wasser und/oder Zusatzstoffe in den Boden einzubringen, um dessen Einbaufähigkeit und Tragfähigkeit zu erhöhen. Typische Anwendungsfälle für die Bodenstabilisierung sind der Bau von Straßen oder Schienenwegen sowie Industrieflächen.In order to improve or consolidate soils, it is known to incorporate pulverulent binders, for example lime or cement, water and / or additives into the soil, in order to increase its installation capacity and load-bearing capacity. Typical applications for soil stabilization are the construction of roads or railway tracks as well as industrial areas.
Zement kann zur staubfreien Zugabe außerdem als Suspension (in Wasser gelöst) zugegeben werden. Dieses Verfahren ist aber nur dann anwendbar, wenn zusätzliches Wasser in den Boden eingebracht werden soll. Für Böden mit bereits zu hohem Wassergehalt eignet sich dieses Verfahren nicht. Weiterhin werden Schaumbitumen, bituminöse Lösungen oder Additive verwendet, um die Tragfähigkeit von Böden zu erhöhen.Cement can also be added as a suspension (dissolved in water) for dust-free addition. However, this method is only applicable if additional water is to be introduced into the soil. For soils with already too high water content, this method is not suitable. Furthermore, bitumen, bituminous solutions or additives are used to increase the load bearing capacity of soils.
Zur Bindung loser Bodenschichten ist es daher üblich, dass diese Bindemittel, z.B. bituminöse Lösungen, Schaumbitumen oder Suspensionen und/oder Additive und/oder Wasser beim Stabilisierungsprozess mit dem aufgefrästen Material gemischt werden.For bonding loose soil layers it is therefore usual that these binders, e.g. bituminous solutions, foam bitumen or suspensions and / or additives and / or water are mixed in the stabilization process with the milled material.
Die Menge des beizumischenden Bindemittels ergibt sich dabei aus baustellenbedingten Vorgaben und ist üblicherweise in Gewichtsprozent in Verhältnis zu dem zu behandelnden Fräsgut angegeben (beispielsweise 1%ige Beimischung von Bindemittel entspricht 10 kg Bindemittel pro t Fräsgut).The amount of binder to be mixed results from site-specific requirements and is usually given in percent by weight in relation to the milled material to be treated (for example, 1% admixture of binder corresponds to 10 kg of binder per t of milled material).
Die Dosierung der Bindemittel erfolgt im Stand der Technik über eine Dosiereinrichtung, die die tatsächliche Menge des eingebrachten Bindemittels an den aktuellen Betriebszustand der Maschine anpasst. Dazu wird während des Betriebes die Fräsgutmenge des aufgefrästen Materials pro Zeiteinheit anhand von Fräsbreite, Frästiefe und Vorschubgeschwindigkeit erfasst. Anhand dieses Wertes kann dann die Dosierung des Bindemittels erfolgen.The metering of the binders takes place in the prior art via a metering device which adapts the actual amount of binder introduced to the current operating state of the machine. For this purpose, the amount of material being milled is recorded per unit of time during operation on the basis of the milling width, milling depth and feed rate. Based on this value can then be done the dosage of the binder.
Üblicherweise erfolgt eine gewichtsabhängige Dosierung des Bindemittels anhand einer Messung des Volumenstroms und anhand der bekannten Dichte des Bindemittels.Usually, a weight-dependent dosage of the binder takes place on the basis of a measurement of the volume flow and on the basis of the known density of the binder.
Bei der Bearbeitung mehrerer parallel zueinander verlaufender Frässpuren ist es üblich, dass sich die Frässpuren überlappen. In diesem Falle ist es erforderlich, dass lediglich der Anteil des aufgefrästen Materials betrachtet wird, der im Zuge der bereits erfolgten Bearbeitung einer parallel verlaufenden Spur noch nicht mit Bindemittel durchmischt wurde.When processing several mutually parallel milling tracks, it is common that the milling tracks overlap. In this case, it is necessary that only the proportion of the milled material is considered, which was not yet mixed with binder in the course of already completed processing a parallel track.
Hierzu wird die Dosierbreite für das Bindemittel eingestellt und die Bestimmung der aufgefrästen Fräsgutmenge, die mit Bindemittel zu durchmischen ist, erfolgt nicht anhand der Fräsbreite, sondern anhand der eingestellten aktivierten Dosierbreite.For this purpose, the metering width is set for the binder and the determination of the milled Fräsgutmenge, which is to be mixed with binder, is not based on the milling width, but based on the set activated dosing.
Während des kontinuierlichen Fräs- und Mischprozesses befindet sich eine im Wesentlichen konstante Fräsgutmenge an aufgefrästem Material im Mischraum, so dass lediglich der Mengenstrom (Masse- oder Volumenstrom) hinsichtlich der Dosierung betrachtet wird.During the continuous milling and mixing process, there is a substantially constant amount of milled material milled in the mixing chamber, so that only the mass flow (mass or volume flow) is considered with regard to the metering.
Daher genügt es nach dem Stand der Technik, unter der Voraussetzung einer gleichbleibenden Frästiefe und Dosierbreite, die Vorschubgeschwindigkeit zu messen. Bei konstanter Vorschubgeschwindigkeit bleibt der Mengenstrom im Mischraum innerhalb des Walzengehäuses konstant.Therefore, it is sufficient according to the prior art, under the condition of a constant cutting depth and metering width to measure the feed rate. At constant feed rate of the flow in the mixing chamber remains constant within the roll housing.
Nachteilig beim Stand der Technik ist jedoch, dass für den Ansetzprozess der Fräs-/Mischwalze zu Beginn der Bearbeitung keine proportional dosierte Beimischung des Bindemittels erfolgen kann.A disadvantage of the prior art, however, is that for the piecing process of the milling / mixing roller at the beginning of processing no proportionally metered admixture of the binder can take place.
Die nach dem Stand der Technik für die Förderung des Bindemittels verwendeten Pumpen sind nicht von einem Wert 0 bis auf eine gewünschte Förderleistung regelbar. Daher kann in der Regel keine kontinuierliche Erhöhung der Fördermenge im Zuge des Ansetzprozesses erfolgen.The pumps used in the prior art for the promotion of the binder are not adjustable from a value 0 to a desired flow rate. Therefore, as a rule, there can be no continuous increase in the delivery rate in the course of the piecing process.
Beginnt die Eindüsung bereits zu Beginn des Ansetzprozesses, so ist die Menge des eingebrachten Bindemittels zu hoch und das Arbeitsergebnis entspricht daher nicht den Vorgaben.If the injection begins at the beginning of the piecing process, then the amount of binder introduced is too high and the result of the work does not correspond to the specifications.
Beginnt die Eindüsung des Bindemittels erst, wenn die Fräswalze komplett in die zu bearbeitende Schicht eingedrungen ist, bzw. wenn die Maschine mit dem Vorschub beginnt, so besteht das Problem, dass sich bereits abgetragenes Material schon außerhalb des Eingriffbereiches der Fräs-/Mischwalze befindet und somit nicht mehr mit dem nun eingedüsten Bindemittel vermischt werden kann.Begins the injection of the binder only when the milling drum has completely penetrated into the layer to be processed, or when the machine starts to feed, so there is the problem that already eroded material is already outside the engagement area of the milling / mixing roller and thus can not be mixed with the now-injected binder.
In der Praxis ergibt sich daher zum Beginn einer Frässpur ein Ansetzbereich von mehreren Metern, in dem das Material nicht mit ausreichend Bindemittel durchmischt wird, oder in dem übermäßig viel Bindemittel in das Material eingebracht wird. Dieser Bereich muss dann auf anderem Wege nachbearbeitet werden. Alternativ besteht die Möglichkeit die Automatik während des Ansetzprozesses zu deaktivieren und die Einbringung des Bindemittels manuell zu steuern. Diese Variante hat jedoch den Nachteil, dass keine Dosierung des Materials entsprechend den Vorgaben erfolgt, im Regelfall zu viel oder zu wenig Bindemittel in den Boden eingebracht wird und die Qualität des bearbeiteten Bereiches nicht den Vorgaben entspricht, weil keine gleichmäßige Standfestigkeit des bearbeiteten Schicht über die gesamte bearbeitete Fläche erzielt wird.In practice, therefore, results at the beginning of a milling track a Ansetzbereich of several meters, in which the material is not mixed with sufficient binder, or is introduced in the excessive amount of binder in the material. This area must then be reworked by other means. Alternatively, it is possible to disable the automatic during the piecing process and manually control the introduction of the binder. However, this variant has the disadvantage that no dosage of the material is carried out according to the specifications, usually too much or too little binder is introduced into the soil and the quality of the machined area does not meet the requirements, because no uniform stability of the machined layer on the entire machined surface is achieved.
Dies ist insbesondere deswegen nachteilig, weil für die Bearbeitung einer Fläche in der Regel mehr als ein Ansetzprozess notwendig ist und die Nachbearbeitung des Arbeitsergebnisses daher an verschiedenen Stellen notwendig ist. Unterbleibt eine Nachbearbeitung, steigt die Gefahr von Schäden, und eine verminderte Haltbarkeit der Verkehrsfläche ist zu erwarten.This is particularly disadvantageous because more than one piecing process is usually necessary for the processing of a surface and the reworking of the result is therefore necessary at different points. Failing a post-processing, the risk of damage increases, and a reduced durability of the traffic area is to be expected.
Die Aufgabe der Erfindung ist es daher, ein Verfahren zum Verfestigen von Schichten bzw. eine Baumaschine zu schaffen, die es ermöglichen, die Notwendigkeit einer Nachbearbeitung des Arbeitsergebnisses zu vermeiden.The object of the invention is therefore to provide a method for consolidating layers or a construction machine, which make it possible to avoid the need for post-processing of the work result.
Zur Lösung dieser Aufgabe dienen die Merkmale des Anspruchs 1, 8 oder 9.To solve this problem serve the features of
Die Erfindung sieht in vorteilhafter Weise vor, dass während des Ansetzprozesses die Bestimmung zumindest der aktuell zuzuführenden Bindemittelmenge bis zum Erreichen der vorgegebenen Frästiefe im Wesentlichen in Abhängigkeit der im Mischraum befindlichen aktuell aufgefrästen Fräsgutmenge erfolgt. Dies hat den Vorteil, dass das vorgegebene Mischungsverhältnis zwischen Bindemittel und abgefrästem Material auch in der Ansetzphase im Wesentlichen eingehalten werden kann und eine homogene Bodenverfestigung im gesamten bearbeiteten Bereich erzielt werden kann.The invention advantageously provides that, during the piecing process, the determination of at least the amount of binder currently to be fed is carried out until the predetermined milling depth has been reached, depending essentially on the amount of milled material currently being milled in the mixing chamber. This has the advantage that the predetermined mixing ratio between binder and milled material can be substantially maintained even in the preparation phase and a homogeneous soil consolidation in the entire machined area can be achieved.
Mit dem Begriff Bindemittel sind hier Bindemittel, sowie Wasser und/oder Zusatzstoffe zu verstehen.The term binder is to be understood as meaning binders, as well as water and / or additives.
Es kann vorgesehen sein, dass die aktuell im Mischraum befindliche Fräsgutmenge zumindest in Abhängigkeit der aktuellen Frästiefe der Fräs-/Mischwalze bestimmt wird.It can be provided that the amount of milled material currently in the mixing chamber is determined at least as a function of the current milling depth of the milling / mixing roller.
Vorzugsweise wird die aktuell im Mischraum befindliche Fräsgutmenge zumindest in Abhängigkeit der aktuellen Eindringgeschwindigkeit der Fräs-/Mischwalze in die Schicht bestimmt.Preferably, the amount of material currently in the mixing chamber is determined at least as a function of the current penetration speed of the milling / mixing roller in the layer.
Bei der Erfindung wird die Änderung der Frästiefe gemessen, um daraus auf die sich ändernde Fräsgutmenge im Mischraum zu schließen.In the invention, the change in the cutting depth is measured, in order to conclude on the changing amount of milled material in the mixing chamber.
Beim Ansetzprozess ist zu Beginn des Fräs-und Mischprozesses davon auszugehen, dass in den seltensten Fällen eine konstante Eindringgeschwindigkeit für das Eindringen der Fräs/- und Mischwalze in das Material gegeben ist. Dies ist darin begründet, dass z.B. unterschiedliche Asphaltschichten unterschiedliche Festigkeiten aufweisen, beispielsweise eine Deckschicht gegenüber einer Tragschicht.At the beginning of the milling and mixing process, it is to be assumed during the piecing process that, in the rarest of cases, a constant penetration rate for the Penetration of the milling / - and mixing roller is given in the material. This is due to the fact that, for example, different asphalt layers have different strengths, for example a cover layer in relation to a base layer.
Insbesondere ist vorgesehen, dass das Bestimmen der im Mischraum befindlichen aufgefrästen Fräsgutmenge durch die Messung der Frästiefe sowie in Abhängigkeit des Radius und der Breite der Fräs-/Mischwalze, bzw. der Dosierbreite erfolgt.In particular, it is provided that the determination of the amount of milled material located in the mixing chamber is determined by the measurement of the milling depth and in dependence on the radius and the width of the milling / mixing roller or dosing width.
Die Dosierbreite der Fräs-/Mischwalze ist der Teil der im Eingriff mit der noch nicht behandelten Schicht ist. Eine Dosiereinrichtung, beispielsweise in Form einer Dosierleiste mit mehreren nebeneinander angeordneten Einspritzdüsen ist nur in dem Bereich der Dosierbreite eingeschaltet.The metering width of the milling / mixing roller is the part that is engaged with the not yet treated layer. A metering device, for example in the form of a metering strip with a plurality of injection nozzles arranged side by side, is switched on only in the area of the metering width.
Aus der Änderung der Frästiefe kann die Änderung der aktuell zuzuführenden Menge an Bindemitteln berechnet werden.The change in the milling depth can be used to calculate the change in the quantity of binders currently to be supplied.
Hierzu erfolgt beim Eindringen der Fräswalze in die Schicht eine Berechnung der aktuell gefrästen Fräsgutmenge pro Zeiteinheit im Wesentlichen über die Erfassung der Änderung der Frästiefe. Damit wird es ermöglicht, in Abhängigkeit von dem Radius des Schnittkreises und der Fräsbreite bzw. der aktuellen Dosierbreite der Fräs-/Mischwalze die noch nicht mit Bindemittel versetzte Fräsgutmenge zu bestimmen. Anhand der auf diese Weise bestimmten, aktuell im Mischraum vorhandenen Fräsgutmenge pro Zeiteinheit erfolgt dann eine Steuerung des eingedüsten Menge an Bindemittel in den Mischraum.For this purpose, when the milling drum penetrates into the layer, a calculation of the currently milled amount of milled material per unit of time takes place essentially via the detection of the change in the milling depth. This makes it possible, depending on the radius of the cutting circle and the milling width or the current metering width of the milling / mixing roller to determine the not yet mixed with binder amount of milled material. On the basis of the amount of material per unit of time currently present in the mixing space, the amount of binder injected into the mixing space is then controlled.
Die Änderung der Frästiefe ist bedingt durch die Eindringgeschwindigkeit. Anhand der Frästiefe wird die aktuell im Mischraum vorhandene Fräsgutmenge berechnet. Zu jedem Zeitpunkt soll die aufintegrierte zugeführte Bindemittelmenge proportional zu der aufintegrierten im Mischraum befindlichen Fräsgutmenge sein.The change in the milling depth is due to the penetration rate. On the basis of the milling depth, the amount of milled material currently present in the mixing chamber is calculated. At any time, the integrated amount of binder added should be proportional to the integrated amount of milled material in the mixing chamber.
Bei einem Ausführungsbeispiel ist vorgesehen, dass wenn die Fräsgutmenge eine gewisse Grenze überschreitet, die Eindüsung von Bindemittel gestartet wird, bzw. dass wenn eine ausreichende Fräsgutmenge im Mischraum vorhanden ist, eine kontinuierliche Eindüsung mit variablem Mengenstrom an Bindemittel begonnen wird.In one embodiment, it is provided that, when the amount of milled material exceeds a certain limit, the injection of binder is started, or that if a sufficient amount of milled material is present in the mixing space, a continuous injection with variable flow rate of binder is started.
Aufgrund der Eindringgeschwindigkeit kann die Frästiefe zu einem bestimmten Zeitpunkt bestimmt werden; dieser Frästiefe kann, aufgrund der vorgegebenen Geometrie der Fräswalze das zu einem bestimmten Zeitpunkt im Mischraum vorhandene Volumen zugeordnet werden.Due to the penetration rate, the depth of cut can be determined at a specific time; This milling depth can, due to the given geometry of the milling drum, be assigned to the volume existing at the time in the mixing chamber.
Alternativ kann auch die aktuelle Frästiefe unmittelbar gemessen werden.Alternatively, the current milling depth can be measured directly.
Nach dem Erreichen der vorgegebenen Frästiefe und dem Beginn des Vorschubs kann die Steuerung des Mengenstroms an Bindemittel in herkömmlicher Weise in Abhängigkeit der Fräsbreite, der vorgegebenen Frästiefe und der aktuellen Vorschubgeschwindigkeit mit dem aus dem Stand der Technik bekannten Verfahren durchgeführt werden.After reaching the predetermined milling depth and the beginning of the feed, the control of the amount of binder can be carried out in a conventional manner depending on the milling width, the predetermined cutting depth and the current feed rate with the known from the prior art method.
Zur Lösung der Aufgabe ist auch eine Baumaschine vorgesehen, bei der die Steuerungseinrichtung die aktuell zugeführte Bindemittelmenge vor dem Erreichen der vorgegebenen Frästiefe in Abhängigkeit der aktuell im Mischraum befindlichen Fräsgutmenge steuert.To solve the problem, a construction machine is provided, in which the control device controls the currently supplied amount of binder before reaching the predetermined milling depth depending on the currently located in the mixing chamber amount of milled material.
Vorzugsweise ist vorgesehen, dass die Steuerungseinrichtung die aktuell im Mischraum befindliche Fräsgutmenge zumindest in Abhängigkeit der Eindringgeschwindigkeit der Fräs-/Mischwalze in die Bodenschicht bestimmt und die Dosierung des Bindemittels proportional steuert.Preferably, it is provided that the control device determines the amount of material currently in the mixing chamber at least as a function of the penetration rate of the milling / mixing roller in the soil layer and controls the dosage of the binder proportionally.
Bei einem bevorzugten Ausführungsbeispiel ist vorgesehen, dass die Dichtewerte unterschiedlicher abzuarbeitender Schichten und der einzusetzenden Bindemittel in einer Datenbank der Steuerung oder der Steuerungseinrichtung gespeichert sind.In a preferred embodiment, it is provided that the density values of different layers to be processed and the binder to be used are stored in a database of the controller or the control device.
Im Folgenden wird unter Bezugnahme auf die Figur die Erfindung näher erläutert.In the following, the invention will be explained in more detail with reference to the figure.
Es zeigen:
- Fig. 1
- eine schematische Darstellung einer erfindungsgemäßen Baumaschine,
- Fig. 2
- der die Fräs- und Mischwalze umgebende Mischraum mit einer Dosiereinrichtung zum Eindüsen von Bindemittel,
- Fig. 3a
- sich aus dem Ansetzprozess ergebende Ansetzbereiche,
- Fig. 3b
- die Standfestigkeit der verfestigten Bodenschicht nach dem Stand der Technik,
- Fig. 4a
- eine schematische Darstellung der Berechnungsparameter zur Bestimmung der Bindemittelmenge,
- Fig. 4b
- die Fräsbreite der Fräs-/Mischwalze, und
- Fig. 5
- die Anpassung der Bindemitteldosierung während der Ansetzphase im Vergleich zum Stand der Technik.
- Fig. 1
- a schematic representation of a construction machine according to the invention,
- Fig. 2
- the mixing chamber surrounding the milling and mixing roller with a metering device for injecting binder,
- Fig. 3a
- Ansetzbereiche resulting from the piecing process,
- Fig. 3b
- the stability of the solidified soil layer according to the prior art,
- Fig. 4a
- a schematic representation of the calculation parameters for determining the amount of binder,
- Fig. 4b
- the milling width of the milling / mixing roller, and
- Fig. 5
- the adaptation of the binder dosage during the Ansetzphase compared to the prior art.
Die Fahrwerke weisen am vorderen und hinteren Ende des Maschinenrahmens 1 zwei gemeinsam oder wahlweise einzeln lenkbare Fahrwerksachsen auf, bei der jedes Rad mit einem eigenen hydraulischen Antrieb in Form eines Hydromotors versehen ist und ggf. separat angesteuert werden kann. Jedes Rad ist mit einer Höhenverstelleinrichtung 5,6 versehen, so dass die Höhe des Maschinenrahmens 1 und ggf, dessen Neigung exakt auf Arbeits- oder Transporthöhe einstellbar ist. Unterhalb der Fahrerkabine 20 zur Maschinenmitte ist versetzt ein Walzengehäuse 7 befestigt, das einen als Mischraum 10 dienenden Arbeitsraum einer rotierenden Fräs-/Mischwalze 8 begrenzt.The trolleys have at the front and rear ends of the
Erfolgt keine Steuerung der Bindemittelmenge im Ansetzbereich 22, ergeben sich beim Stand der Technik Unterschiede in der Standfestigkeit S des Untergrundes, wie sie in
Bei großflächiger Bearbeitung wird es aufgrund verschiedener Rahmenbedingungen im Regelfall notwendig, die Maschine mehrfach neu anzusetzen.In the case of large-area machining, it is generally necessary, due to various basic conditions, to re-set the machine several times.
Neben der Tatsache, dass ein mehrfaches Ansetzen aufgrund der begrenzten Arbeitsbreite der Baumaschine, z. B. eines Stabilisierers, erforderlich ist, kann es notwendig werden, eine Frässpur zu unterbrechen und benachbarte nebenliegende Bereiche zu bearbeiten, um die Nachbearbeitung durch Grader und/oder Verdichter zu ermöglichen.In addition to the fact that a multiple attachment due to the limited working width of the construction machine, z. As a stabilizer is required, it may be necessary to interrupt a milling track and edit adjacent adjacent areas to allow post-processing by graders and / or compressors.
Dies ergibt sich vor allem aus der Tatsache, dass nach dem Einbringen des Bindemittels nur ein begrenzter Zeitraum zur Verfügung steht, in dem das Material in der gewünschten Qualität bearbeitet werden kann.This is mainly due to the fact that after the introduction of the binder only a limited period of time is available in which the material can be processed in the desired quality.
Dies ist u. a. damit begründet, dass die eingebrachten Bindemittel verdunsten, oder aushärten können.This is u. a. reasoning that the incorporated binders can evaporate or harden.
Allerdings besteht die Möglichkeit, die Absenkbewegung auch mit einer Vortriebsbewegung zu überlagern. In diesem Fall muss in die Berechnung der im Mischraum 10 befindlichen Fräsgutmenge auch die Fräsgutmenge pro Zeiteinheit eingerechnet werden, die aufgrund der Vortriebsgeschwindigkeit zusätzlich in den Mischraum 10 gelangt.However, there is the possibility to superimpose the lowering movement with a propulsion movement. In this case, the amount of material to be milled per unit of time must also be included in the calculation of the amount of material to be milled in the mixing
Während des Ansetzprozesses ergibt sich ein komplexer Sachverhalt, da nun die Berechnung der aufgefrästen Fräsgutmenge über eine Funktion erfolgen muss, die die Fräswalzenbreite FB (bzw. eine Dosierbreite FB')und die Querschnittsfläche A des mit der Schicht 2, in Eingriff befindlichen Teiles des Schnittkreises 15 der Fräs-/Mischwalze 8 berücksichtigt.During the Ansetzprozesses results in a complex issue, since now the calculation of the milled Fräsgutmenge must be made via a function that the Fräswalzenbreite FB (or a Dosierbreite FB ') and the cross-sectional area A of the
Mit A ist die Querschnittsfläche des aktuell in der Schicht 2 befindlichen Kreisabschnittes bezeichnet, der durch die Frästiefe FT und den Durchmesser der Fräs/Mischwalze 8, d. h. den Radius r des Schnittkreises 15 vorgegeben ist.A denotes the cross-sectional area of the circular section currently located in the
Mit einer Änderung der Frästiefe FT ergibt sich somit gleichzeitig eine Änderung der Querschnittsfläche A über die Zeit. Das Volumen kann aus dem Produkt von Fräsbreite FB (bzw. Dosierbreite FB') und Querschnittsfläche A berechnet werden.With a change in the milling depth FT, there is thus simultaneously a change in the cross-sectional area A over time. The volume can be calculated from the product of milling width FB (or metering width FB ') and cross-sectional area A.
Es gelten folgende Beziehungen:
Durch Auflösen der unteren Beziehung nach s ergibt sich:
Durch Einsetzen von s in die obere Beziehung ergibt sich für die aktuelle Querschnittsfläche A:
Es versteht sich, dass die angegebenen Formeln nur ein realisierbares, den Schutzumfang nicht beschränkendes Ausführungsbeispiel repräsentieren, und dass auch Abwandlungen der Formeln, z.B. in Form von Korrekturfaktoren oder zusätzlichen Parametern oder Vereinfachungen, möglich sind.It is understood that the formulas given represent only one realizable embodiment which does not limit the scope of protection, and that also modifications of the formulas, e.g. in the form of correction factors or additional parameters or simplifications.
Durch die Änderung der Querschnittsfläche A, bei konstanter oder nicht konstanter Absenkgeschwindigkeit der Fräs-/Mischwalze 8 ergibt sich somit eine kontinuierliche Änderung des Volumens bzw. der Masse des aufgefrästen Fräsgutes je Zeiteinheit.By changing the cross-sectional area A, at a constant or not constant lowering speed of the milling / mixing
Daraus folgt, dass auch bei konstanter Eindringgeschwindigkeit der Fräs-/Mischwalze in das Material die Bindemitteldosierung nicht konstant ist und in Abhängigkeit von der Frästiefe ständig angepasst werden muss.It follows that even with a constant penetration rate of the milling / mixing roller into the material, the binder dosage is not constant and must be constantly adjusted depending on the milling depth.
Ein vereinfachtes Beispiel für eine variable Bindemitteldosierung B = f (t) während des Ansetzprozesses zeigt
Die Berechnung der Masse zuzugebender Bindemittel je Zeiteinheit erfolgt in Abhängigkeit von der Masse M der Fräsgutmenge pro Zeiteinheit über folgende Beziehung:
wobei V/t das aufgefräste Volumen je Zeiteinheit und D die Dichte des Fräsgutes angibt.The calculation of the mass of binder to be added per time unit takes place as a function of the mass M of the amount of material to be milled per unit of time via the following relationship:
where V / t is the milled volume per unit time and D is the density of the milled material.
Nach Erreichen der vorgegebenen Frästiefe FT ergibt sich das Volumen je Zeiteinheit V/t der aufgefrästen Fräsgutmenge aus der Querschnittsfläche der Fräs/Mischwalze 8, die sich im Eingriff mit der Materialschicht 2 befindet und der zurückgelegten Strecke/Zeit (Vorschubgeschwindigkeit v) aus folgender Beziehung gemäß dem Stand der Technik:
Die Dosiereinrichtung 16, mit deren Hilfe das Bindemittel zugeführt wird, wird von einer Steuerungseinrichtung 14 gesteuert. Die Steuerungseinrichtung 14 kann Bestandteil einer Maschinensteuerung 12 sein, mit der der Fahrantrieb der Baumaschine und der Antrieb der Fräs-/Mischwalze 8 gesteuert wird.The
Die Dichtewerte D unterschiedlicher abzuarbeitender Schichten 2 und der einzusetzenden Bindemittel sind vorzugsweise in einer Datenbank 18 der Steuerung 12 oder der Steuerungseinrichtung 14 gespeichert.The density values D of
Wie aus
Die Fräsbreite FB in den Formeln kann durch die effektive Dosierbreite FB' ersetzt werden, um die Bindemittelmenge korrekt zu berechnen.The milling width FB in the formulas can be replaced by the effective metering width FB 'to correctly calculate the amount of binder.
In der einfachsten Ausführungsform ist es lediglich nötig, beim Ansetzprozess die Frästiefe FT zu messen und anhand der Frästiefe das Volumen und damit die Masse des Fräsgutes zu bestimmen. Ist eine bestimmte Fräsgutmenge erreicht, so erfolgt eine entsprechende Eindüsung von Bindemittel.In the simplest embodiment, it is only necessary to measure the milling depth FT during the piecing process and to determine the volume and thus the mass of the milled material on the basis of the depth of cut. If a certain amount of milled material is reached, then a corresponding injection of binder takes place.
Um einen Betrieb der zur Förderung des Bindemittels verwendeten Pumpen entsprechend der pumpenspezifischen Betriebsparameter zu gewährleisten, kann es hierzu auch notwendig sein, das Bindemittel nicht kontinuierlich, sondern getaktet in den Mischraum 10 einzubringen. Dazu erfolgt eine kontinuierliche Überwachung der im Fräswalzengehäuse 7 vorhandenen Fräsgutmenge, um zu ermitteln, wann eine erneute Einbringung von Bindemittel erforderlich ist.In order to ensure operation of the pumps used for conveying the binder in accordance with the pump-specific operating parameters, it may also be necessary for this purpose to introduce the binder not continuously but in a clocked manner into the mixing
Es wird eine Beimischung von 10 Gew.% Bindemittel benötigt. Die Pumpe weist bei Aktivierung eine minimale Fördermenge von Bindemittel eines Volumens entsprechend 20 kg auf.An admixture of 10% by weight of binder is needed. When activated, the pump has a minimum delivery of binder of a volume equal to 20 kg.
Sobald die Fräsgutmenge (bestimmt über Frästiefe) einer Masse von 200 kg entspricht, erfolgt eine erste Eindüsung der Mindestmenge an Bindemittel. Sobald die Frääsgutmenge einer aufgefrästen Masse von 400 kg entspricht, erfolgt eine zweite Eindüsung der Mindestmenge Bindemittel, usw. Über diese Vorgehensweise kann der gesamte Ansetzprozess begleitet werden, ohne dass die Eindringgeschwindigkeit erfasst werden muss.As soon as the amount of milled material (determined via milling depth) corresponds to a mass of 200 kg, a first injection of the minimum quantity of binder takes place. As soon as If the amount of material to be milled corresponds to a milled mass of 400 kg, a second injection of the minimum quantity of binder, etc. takes place. This procedure can accompany the entire piecing process without having to record the penetration rate.
Sobald ein ausreichender Mengenstrom an Material erreicht ist, um einen Betrieb der Pumpen oberhalb der minimalen Fördermenge zu gewährleisten, kann mit der kontinuierlichen Eindüsung von Bindemitteln mit variablem Mengenstrom begonnen werden.Once a sufficient flow of material is achieved to ensure operation of the pumps above the minimum flow rate, continuous injection of variable flow rate binders can begin.
Beginnt die Maschine mit dem Vorschub kann die kontinuierliche Einbringung des Bindemittels in Abhängigkeit von der Vorschubgeschwindigkeit v gemäß dem aus dem Stand der Technik bekannten Verfahren erfolgen.If the machine starts to feed, the continuous introduction of the binder can be effected as a function of the feed rate v according to the method known from the prior art.
Anstelle eines selbstfahrenden Stabilisieres können auch Anbaustabilisierer das beschriebene Verfahren nutzen. Dabei handelt es sich um nicht selbstfahrende Anbaugeräte, die beispielsweise von einem Traktor bewegt werden. Ein Beispiel für einen derartigen Anbaustabilisierer ist die Wirtgen-Maschine WS 250.Instead of a self-propelled stabilizer also cultivation stabilizers can use the described method. These are not self-propelled attachments that are moved by a tractor, for example. An example of such an attachment stabilizer is the Wirtgen WS 250 machine.
Bei anderen Anwendungsfällen erfolgt die Dosierung des Bindemittels, beispielsweise einer Suspension, nicht durch den Stabilisierer selbst, sondern z. B. durch eine vorwegfahrende Suspensionsmischanlage, wie sie beispielsweise als Wirtgen-Suspensionsmischanlage WM 1000 bekannt ist.In other applications, the dosage of the binder, such as a suspension, not by the stabilizer itself, but z. B. by an anticipated suspension mixing plant, as it is known for example as Wirtgen suspension mixing plant WM 1000.
Beispielsweise ist es bei dieser Ausführungsform möglich, die Steuerung der abgegebenen Bindemittelmenge auf einer anderen Maschine anhand der Betriebsparameter des Bodenstabilisierers oder der Anbaumaschine durchzuführen, wobei das Bindemittel dem Mischraum 10 zugeführt wird.For example, in this embodiment, it is possible to perform the control of the delivered amount of binder on another machine based on the operating parameters of the soil stabilizer or the cultivation machine, wherein the binder is supplied to the mixing
Claims (15)
dadurch gekennzeichnet, dass
während des Ansetzprozesses die Bestimmung zumindest der aktuell zuzuführenden Bindemittelmenge bis zum Erreichen der vorgegebenen Frästiefe (FT) in Abhängigkeit der aktuell im Mischraum (10) befindlichen, aufgefrästen Fräsgutmenge erfolgt.Method for treating layers (2) by milling the layers (2) and by introducing binders into the milled volume of the layer (2) to be treated, with a construction machine having a milling / mixing roller (8) with which the layer ( 2) in a predetermined milling depth (FT) is milled, wherein the milling / mixing roller (8) by a roller housing (7) is surrounded, which limits the mixing space (10) of the milling / mixing roller (8) and wherein in continuous operation the amount of binders fed per unit time is automatically mixed in proportion to the amount of milled material per unit of time,
characterized in that
During the piecing process, the determination of at least the amount of binder currently to be supplied is carried out until the predetermined milling depth (FT) is reached as a function of the milled material quantity currently being milled in the mixing chamber (10).
dadurch gekennzeichnet,dass
die Steuerungseinrichtung (14) die aktuell zugeführte Bindemittelmenge vor dem Erreichen der vorgegebenen Frästiefe in Abhängigkeit der aktuell im Mischraum (10) befindlichen abgefrästen Fräsgutmenge steuert.
characterized in that
the control device (14) controls the currently supplied amount of binder before reaching the predetermined milling depth as a function of the milled material currently located in the mixing chamber (10).
dadurch gekennzeichnet,dass
die Steuerungseinrichtung (14) die aktuell zugeführte Bindemittelmenge vor dem Erreichen der vorgegebenen Frästiefe in Abhängigkeit der aktuell im Mischraum (10) befindlichen aufgefrästen Fräsgutmenge steuert.
characterized in that
the control device (14) controls the currently supplied amount of binder before reaching the predetermined milling depth as a function of the milled material currently located in the mixing chamber (10).
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- 2013-11-15 US US14/080,838 patent/US8956076B2/en active Active
- 2013-11-27 CN CN201310618115.2A patent/CN103835211B/en active Active
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WO2002101149A1 (en) * | 2001-06-07 | 2002-12-19 | Kmc Enterprises, Inc. | Method of upgrading gravel and/or dirt roads and a composite road resulting therefrom |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN104563174A (en) * | 2013-10-25 | 2015-04-29 | 卡特彼勒路面机械公司 | Ground characteristic milling machine control |
CN106868994A (en) * | 2017-03-07 | 2017-06-20 | 中交公局第六工程有限公司 | A kind of method of the continuous mix of cement stabilized soil |
Also Published As
Publication number | Publication date |
---|---|
US20140147206A1 (en) | 2014-05-29 |
CN103835211A (en) | 2014-06-04 |
CN103835211B (en) | 2016-03-16 |
US8956076B2 (en) | 2015-02-17 |
EP2735650B1 (en) | 2015-04-01 |
DE102012221654A1 (en) | 2014-05-28 |
EP2735650B2 (en) | 2018-09-26 |
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