EP2853366A1 - Method for the production of a core sample in soils contaminated by hazardous materials and device for implementing such a method - Google Patents

Abstract

A method and apparatus for making a core in a ground plate (50) of contaminated material / topping (52) with a core machine (12) having a drill bit (58) with a bit (16), the bit (16) flushing water (SPW) is supplied via a feed water line (60), characterized in that a dense water circulation in which the area of the drill bit (16) is surrounded in a watertight manner by a sealing unit (18), the rinse water (SPW) supplied to the drill bit (16) Sucked water (SMW) with impurities (56) is sucked out of a sealing chamber (20) formed between the sealing unit (18) and the top lining (52) during the drilling operation, and the dirty water (SMW) is subsequently separated from the contaminants (56) recycled rinse water (SPW) is returned to the drill bit (16).

Description

TECHNICAL AREA

The present invention relates to a method for producing a drill core in a ground plate with hazardous material / surface covering with a drill core machine with drill, with drill bit, wherein the drill bit rinse water is supplied via a feed water line. The present invention also relates to an apparatus for carrying out such a method.

STATE OF THE ART

In the past, many floor coverings were used that are contaminated with hazardous substances and therefore sometimes pose a threat to human health. Thus, in particular in industrial plants, the floor slabs were provided with an asbestos-containing surface covering, since asbestos has fire-retardant properties and, moreover, is a good insulating material. With increasing consumption of asbestos, however, it has been found that the health risks for humans have increased immensely, so that since 1970, the asbestos fiber is officially assessed as carcinogenic. The use of asbestos products is prohibited in the meantime. Therefore, there are many floor coverings to work on which need to be rehabilitated to remove the asbestos-containing materials and replace them with non-harmful materials. Improper handling of asbestos and the processing (for example with high-speed machines) asbestos-containing materials are released asbestos fibers and can reach the alveoli of the lungs of the respective Beatmers and trigger an asbestosis even at low load. The risk of developing lung cancer is enormously increased. As a result, when rehabilitating coverings with asbestos-containing material, the assurance that no asbestos fibers enter the environment during remediation has the highest priority.

Furthermore, so-called polycyclic aromatic hydrocarbons (PAHs) were used for gluing parquet until the 1970s, which also involved a high health risk. When renovating such floor coverings, care must be taken to ensure that no material is released.

Before a refurbishment is definitely carried out, in many cases a drill core sample has to be drawn. For this purpose, core drilling machines are used, which generate by means of the rotation of a drill bit a core, which is then removed and analyzed.

With the known core drilling machines, it is not possible to guarantee that no harmful substances enter the environment during the production of the core.

PRESENTATION OF THE INVENTION

Based on the cited prior art, the present invention has the object or the technical problem of providing a method for producing a drill core in a base plate with hazardous material / Oberbelag and a device for performing the method by means of which / a excludes health hazards to the operator during the production of the core, which can be used economically, the individual components can be used in a simple manner and thus allow an economic production of a core and also ensure a permanently reliable function.

The inventive method for producing a core in a base plate with hazardous material / Oberbelag is given by the features of independent claim 1.

Advantageous embodiments and further developments of the method are given by the dependent of the independent claim 1 directly or indirectly dependent claims.

The device according to the invention for carrying out the method is given by the features of independent claim 4. Advantageous embodiments and further developments of the device according to the invention are represented by the claims directly or indirectly dependent on the independent claim 4 claims.

The inventive method of the type mentioned is accordingly characterized in that a tight in itself water cycle is formed, in which the area of the drill bit is watertight surrounded by a sealing unit, which is also designed as a water ring with sealing chamber, the rinse water supplied to the drill bit is sucked as dirty water with impurities from an existing between the sealing unit and the topping during the drilling sealing chamber, the dirty water is then separated from the impurities and the rinse water again received the drill bit is fed. The separated impurities can then be disposed of as needed.

The basic idea according to the invention consists in the fact that during the production of the drill core a completely watertight circuit is formed, by which it is prevented that no hazardous material gets into the environment. The supplied rinse water is sucked in the area of the drill bit, after it is loaded with contaminated pollutants contaminated within the circuit and discharged as dirty water, and then the impurity particles are separated from the waste water, which From the dirty water again rinse water is formed, which can be supplied to the drill bit again. The water cycle also allows an economic implementation of the method, since the water consumption in the production of such cores is significantly limited and does not constantly fresh water must be supplied.

A particularly preferred embodiment of the method according to the invention is characterized in that when sucking the dirty water from the sealing chamber of the sealing unit, a peristaltic pump is used which generates a negative pressure, in particular up to 1.0 bar, in the sealing chamber and sucks the dirty water via a return water line and a water tank means for separating the contaminant from the dirty water supplies.

The use of a peristaltic pump ensures that no dry running of the pumps can take place, since a peristaltic pump does not run dry, even if the suction material does not exist for a certain period of time. In addition, a peristaltic pump can generate a sufficiently large underpressure, for example up to 1.0 bar, so that a reliable suction of the dirty water with impurities, some of which also consist of solid particles, is ensured at all times. A structurally particularly simple to implement and therefore very advantageous development of the method according to the invention is characterized in that the dirty water is fed to a settling chamber designed as the first container unit in which deposit the impurity on the bottom of the first container unit and thereby cleaned dirty water as rinse water an overflow is directed into a second container unit and from the drill bit is fed again via a second pumping unit and the supply water line.

A particularly advantageous embodiment of the method, which ensures an optional sealing unit, is characterized in that a vacuum plate which is present on the underside is activated before the drilling operation, whereby the sealing unit arranged on a holding unit on the underside is pressed sealingly onto the ground surface.

The inventive device for producing a drill core in a base plate with hazardous material / Oberbelag is inventively characterized in that a sealing unit in the drill bit is present, which is sealingly placed on the top of the bottom plate or on the top surface and thus with this a sealing chamber forms, a water tank means having a first container unit and a second container unit is present, to the sealing chamber via a return water line, a first pump unit is connected, which sucks the dirty water with contamination from the sealing chamber into the first container unit, wherein the first container unit is formed as a settling chamber, in which the contaminants are separated from the dirty water, between the first and second container unit, a partition wall with overflow edge is present over which the cleaned in the first container unit dirty water as a rinse d he second container unit is performed, in the second container unit, a second pump unit is present, which feeds the rinse water via a flow line to the drill or the drill bit again, so that a total of a sealed closed water cycle between rinse water and dirty water is present.

By this device, a closed water cycle is given, which ensures that at no time the core production hazardous contaminants can escape, the production of the core can proceed as usual.

Preferably, the first pump unit is designed as a peristaltic pump, which can not run dry and ensures a permanently reliable suction, since a vacuum can be generated up to 1.0 bar, which is sufficient to the waste water occurring with impurities from the pressure chamber or the Suck drill bit reliably.

Preferably, the second pump unit is designed as a submersible pump within the second container unit, which is a structurally particularly simple implementation and ensures a permanently reliable maintenance of the water cycle.

So that the water tank device after the production of the core to dispose of its contents (water and environmentally hazardous contaminants) can be disposed of easily to a suitable location, a particularly advantageous embodiment is characterized in that the supply water and / or return water pipe detachable via sealing couplings, in particular Metal sealing couplings, is connected to the drill or the sealing chamber and / or the first and / or second pumping unit / are. As a result, even when separating the flow and / or return line ensures that no hazardous substances escape, as close after disconnecting the lines, the connections due to the sealing couplings immediately.

With the device according to the invention, it is easily possible to produce cores having a large diameter, for example, a diameter of 70 millimeters.

The storage volume of the water tank device is preferably in the range between 20 and 150 liters, in particular at 100 liters, so that the water tank device, which is preferably designed to be mobile, can be disposed of for disposal purposes at a reasonable cost to a suitable disposal point.

A particularly advantageous embodiment, which ensures a structurally simple construction with simultaneous performance of a permanently reliable function and accommodates easy disposal, is characterized in that the water container device has an openable and closable cover unit and per chamber (overflow and settling) ever a drain cock (ball valve) are located in the chamber floor so that the contents of the Water tank device taken with the impurities as needed, solidified and disposed of and then the water tank device can be refilled with water.

A particularly advantageous embodiment with regard to optimum sealing conditions is characterized in that the device has a vacuum plate on the underside, the sealing unit is connected on the underside to a holding unit attached to the device, the holding unit sealingly pressing the sealing unit onto the ground surface upon activation of the vacuum plate.

A simple cleaning process is ensured by the fact that the first and second container unit each side has an openable and closable drain cock.

Further advantages and features of the invention are given in the claims further specified features and the following embodiment.

BRIEF DESCRIPTION OF THE DRAWING

Fig. 1

Die Figur zeigt eine stark schematisierte Darstellung einer Vorrichtung zur Herstellung eines Bohrkerns in einer Bodenplatte mit gefahrstoffbelastetem Oberbelag mit einer Bohrkernmaschine und einer Wasserspeichereinrichtung, wobei der Bohrkernmaschine beziehungsweise der Bohrkrone Spülwasser zugeführt wird und das im Bereich der Bohrkrone anfallende Schmutzwasser mit Verunreinigungen abgezogen wird, wobei Spülwasser und Schmutzwasser einen dichten Wasserkreislauf bilden.

The invention will be described and explained in more detail below with reference to the embodiment shown in the drawing. It shows:

Fig. 1

The figure shows a highly schematic representation of an apparatus for producing a core in a floor plate with hazardous material Oberbelag with a core machine and a water storage device, wherein the core drill or the drill bit rinse water is supplied and the accumulating in the field of the drill bit waste water is drawn off with impurities, wherein rinse water and dirty water form a dense water cycle.

WAYS FOR CARRYING OUT THE INVENTION

An embodiment of a device 10 for producing a drill core in a base plate 50 with a contaminated upper lining 52 is shown in highly schematized form in the FIGURE.

The apparatus comprises a drill core machine 12 having a drill bit 58 with drill bit 16 which can be placed on the top pad 52, can be rotated, and presses into the top pad 52 and bottom plate 50 underneath to create a removable cylindrical drill core.

In the area in which the drill 58 or the drill bit 16 attaches to the top surface 52, the lower end portion of a sealing unit 18 (Bohrkrronenabdichtring and water ring) is surrounded, which ensures that the environment of this area is sealed watertight to the outside. At the same time, the sealing unit 18 forms with the surface of the top lining 52 a sealing chamber 20 which communicates with a water connection unit 46, wherein the water connection unit is preferably designed as a metallic sealing coupling for releasably connecting a return water line 62. In the upper region of the drill 58, a further water connection unit 40 is present, which is also designed as a metallic sealing coupling and to which a flow line 60 is connected.

The core drill 12 is disposed on a vacuum plate 64 and fixedly connected thereto.

In the lower edge region, a cantilevered holding unit 66 is fixedly connected to the core drill 12, wherein the sealing unit 18 is fastened on the underside to the holding unit 66. Before the drilling operation is started, the vacuum plate 64 is activated so that the core drill 12 is securely locked on the ground. By activating the vacuum plate, the core drill 12 moves a few millimeters down, whereby the holding unit 66 is moved downward. By this movement, the sealing unit 18 is pressed sealingly on the soil surface, so that prevail in this area optimum sealing conditions and can escape any hazardous material during the drilling process.

Via the water connection unit 40, rinsing water SPW is conducted via the drill 58 into the area of the drill bit 16, which then rests within the sealing chamber 20 and is withdrawn via the water connection unit 46 and the return water line 62 as dirty water SMW with the contaminants 56 produced by the drilling process.

The apparatus 10 further comprises a water tank device 22, to which the supply water line 60 is connected for flushing water SPW and return water line 62 for dirty water SMW with impurities 56.

The water tank device 22 has a first tank unit 24, which is formed as a settling chamber, and a second tank unit 26, which is formed as an overflow chamber. Between the first container unit 24 and the second container unit 26 there is a vertical partition wall 42 with an overflow edge 44 provided on the upper side.

In the region of the first container unit 24, a first pump unit 28 is arranged on the upper side, which is designed as a peristaltic pump and to which the return water line 62 is connected with contaminants 56 for dirty water SMW. The peristaltic pump may alternatively also be arranged in the lower side region of the water container device 22. Via this first pumping unit 28, dirty water SMW is sucked out of the sealing chamber 20 in the region of the drill bit 16 and pumped into the first container unit 24 together with the contaminants 56.

Under the effect of gravity, the contaminants 56 settle in the first container unit 24 in the lower region, so that in the upper region of the first container unit 24 of contaminants 56 purified rinse water is present again. If the water level in the first container unit 24 reaches the overflow edge 44 of the dividing wall 42, it flows as flushing water (SPW) via (arrow Ü) into the adjacent second container unit 26.

On the bottom of the second container unit 26, a second pump unit 30 is provided, which is designed as a submersible pump and to which the supply water line 60 is connected. The second pumping unit 30 pumps the rinse water SPW arriving via the overflow Ü in the second container unit via the water supply line 60 back into the drill 58. As a result, new rinse water SPW finally returns to the area of the drill bit 16 or the sealing chamber 20 and stands there again as dirty water SMW with impurities 56, which is sucked back into the first container unit 24 via the return water line 62 by means of the first pump unit 28 (peristaltic pump).

As a result, a self-contained dense water cycle is present, which ensures that no hazardous pollutants 56 get into the environment when producing a drill core, so that a hazardous substance pollution of the environment with the consequent possible health damage to the operators can be excluded.

Once the accumulated amount of contaminants 56 in the first container unit 24 (distribution chamber) reaches a predetermined level, a disposal is made.

The water tank device 22 is designed as a mobile unit and mounted on bearing rollers 48 in the exemplary embodiment.

In order to carry out the disposal at a suitable location, the supply water line 60 and the return water line 62 is separated at their connections to the core drill 12 on the drill 58 and the sealing unit 18, at this point existing sealing couplings ensure that no water (SPW, SMW ) can escape. Thereafter, the water tank device 22 can be brought to the suitable place for disposal. On the upper side, the water container device has a cover unit 54, which can be opened in the opening direction Ö, so that the interior of the water container device 22, in particular the first and second container unit 24, 26, are accessible.

For disposal, water contained in the water tank device 22 is removed with contaminant 56, for example solidified by means of cement, introduced into packaging units and transported to an intermediate or final deposit.

On the underside, a drain tap 68, 70 is present in each of the container units 24, 26, to which, for disposal purposes, a hose for discharging the dirty water during cleaning work can be connected.

The particular advantage of the formation of the first pump unit 28 as a peristaltic pump is that such a pump can not run dry and reliably ensures a suction of dirty water SMW with contaminants 56 permanently, especially since it is not a problem, by the peristaltic pump a negative pressure of up to 1 , 0 bar to produce, which also ensures a trouble-free suction of solid contaminants.

Overall, the device 10 according to the invention has a robust construction, is easy to operate and ensures that in the case of use no health-endangering contaminants 56, which are produced during the production of a drill core, enter the environment and can cause health damage.

Claims (15)

Method for producing a drill core in a floor plate (50) with contaminated material / top covering (52) with a core drill (12) with drill (58) with drill bit (16), wherein the drill bit (16) rinsing water (SPW) via a feed water line (16) 60) is supplied, - characterized in that - An intrinsically dense water cycle is formed, in which the area of the drill bit (16) is surrounded in a watertight manner by a sealing unit (18), the drill bit (16) supplied rinse water (SPW) as dirty water (SMW) with impurities (56) a sealing chamber (20) formed between the sealing unit (18) and the top lining (52) during the drilling process, the dirty water (SMW) is subsequently separated from the contaminants (56) and the rinsing water (SPW) is returned to the drill bit ( 16) is supplied. Method according to claim 1, - characterized in that - The suction of the dirty water (SMW) from the sealing chamber (20) of the sealing unit (18) a peristaltic pump is used which generates a negative pressure, in particular up to 1.0 bar, in the sealing chamber (20) and via a return water line (62) the dirty water (SMW) sucks and a water tank means (22) for separating the contaminant (56) from the dirty water (SMW) supplies. Method according to claim 1 or 2, - characterized in that - The dirty water (SMW) is supplied to a settling chamber designed as the first container unit (24), settle in the contaminant (56) on the bottom of the first container unit (24) and thereby cleaned dirty water (SMW) as a rinse water (SPW) over an overflow (Ü) in a second container unit (26) is passed and from there again the drill bit (16) via a second pump unit (30) and the feed water line (60) is supplied. Method according to one or more of the preceding claims, - characterized in that - Before the drilling operation, a vacuum plate (64) present on the underside is activated, whereby on a holding unit (66) arranged on the underside sealing unit (18) is pressed sealingly on the soil surface. Device for producing a drill core in a floor plate (50) with contaminated material / top covering (52) by means of a core drill (12) with drill (58) with rotating drill bit (16), the drill bit (16) being supplied with flushing water (SPW), - characterized in that - A sealing unit (18) in the region of the drill bit (16) is provided which is sealingly on the top of the bottom plate (50) or on the top surface (52) can be placed and thereby forms with this a sealing chamber (20), a water tank device (22) with a first tank unit (24) and a second tank unit (26) is present, - Connected to the sealing chamber (20) via a return water line (62), a first pump unit (28), which sucks the dirty water (SMW) with contamination (56) from the sealing chamber (20) in the first container unit (24), wherein the first container unit (24) is designed as a settling chamber, in which the contaminants (56) are separated from the dirty water (SMW), - Between the first and second container unit (24, 26) a partition wall (42) with overflow edge (44) is present, via which in the first container unit (24) purified waste water (SMW) as rinse water (SPW) of the second container unit (26 ) to be led, - In the second container unit (26), a second pumping unit (30) is present, which feeds the rinse water (SPW) via a flow line (60) the drill (58) with drill bit (16), so that a total of a sealed closed water cycle between Rinse water (SPW) and dirty water (SMW) is present. Device according to claim 5, - characterized in that - The first pump unit (28) is designed as a peristaltic pump. Device according to claim 6, - characterized in that - The first pump unit (28) is designed so that it can generate a vacuum up to 1.0 bar. Device according to claim 5, - characterized in that - The second pump unit (30) is designed as a submersible pump within the second container unit (26) arranged. Device according to one or more of claims 5 to 8, - characterized in that the feed water and / or return water line (60, 62) is detachably connected via sealing couplings, in particular metal sealing couplings, to the drill (58) or the sealing chamber (20) and / or the first and / or second pumping unit (28, 30) / are. Device according to claim 5, - characterized in that - The diameter of the drill bit (16) in the range between 30 to 80 millimeters, in particular at 70 millimeters, is located. Device according to claim 5, - characterized in that - The storage volume of the water tank means (22) in the range of 50 to 150 liters, in particular at 100 liters, is located. Device according to claim 5, - characterized in that - The water tank device (22) is designed to be mobile. Device according to claim 5, - characterized in that - The water tank means (22) has an openable and closable cover unit (54), so that the contents of the water tank means with the impurities (56) are removed, if necessary, solidified and disposed of and then can be refilled with water. Device according to one or more of claims 5 to 13, - characterized in that - The device on the underside of a vacuum plate (64), the sealing unit (18) is connected to the underside of a device attached to the holding unit (66), wherein the holding unit (66) upon activation of the vacuum plate (64), the sealing unit (18) sealingly presses the soil surface. Device according to one or more of claims 5 to 14, - characterized in that - The first and second container unit (24, 26) each underside an openable and closable drain cock (68, 70).

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