EP2397609B1 - Method for casting a shaft covering, casting material and use of the casting material in a method for casting a shaft covering - Google Patents

Description

The invention relates to a method for casting a manhole cover according to claim 1, a potting compound according to claim 11 and the use of the potting compound according to the invention in a method according to claim 14.

Shafts existing in the road construction sector are usually finally shed in alignment with the covering layer of asphalt surrounding them as far as possible. However, it is known that it is necessary to carry out remedial measures at regular intervals, for example, when subsidence has occurred due to permanently recurring road traffic loads.

In general, the procedure is such that first the manhole cover and manhole cover mats are milled free or that the road surface around the manhole cover is simple is aufgestemmt. Then the necessary work is carried out on the shaft or manhole cover. At the end of the remediation work, the gap between the manhole or manhole cover and the surrounding road must be filled again in such a way that the road is sufficiently loadable and passable. The problem with asphalt road construction in particular is the costly casting with bituminous mixtures in order to obtain a trafficable road surface layer.

In this context, the sees EP 1 182 299 A1 For example, a method and an apparatus for free-milling a manhole cover pad before. In this case, a conical opening is produced by means of a round milling head as shown above. To fill the opening, however, it has been customary initially to make a backfilling until reaching the lower edge of the outer layer of the surrounding road and then to close the last remaining centimeters with asphalt. This has many disadvantages. Thus, on the one hand, it is quite costly to apply the hot asphalt mass as well as possible and, on the other hand, to prevent the formation of cracks between the existing covering layer and the manhole cover overlay. On the other hand, just at this point a new predetermined breaking point arises, since just the subsidence around the manhole cover pad can be larger. Therefore, there is always the danger that the asphalt layer applied to close the opening will come off again.

The aim of the invention is to avoid these and other disadvantages of the prior art and to provide a method for pouring manhole covers ready, which can be carried out by simple means, cost and time. The aim of the invention is also to provide a potting compound that can be used in a corresponding method.

Main features of the invention are set forth in claim 1, as well as in the characterizing part of claim 11 and in claim 14. Embodiments are the subject of claims 2 to 10, 12 and 13. A method according to the preamble of claim 1 is known from DE 20 2008 005789 U1 known.

In a method of pouring a manhole cover in a road, wherein an opening is made in the road around the manhole cover, which is sealed with a potting compound, wherein the potting compound is made of a filling material and grout, the invention provides that the filling material is a einkorngestein.

A particular advantage of the invention is that in the potting compound instead of a otherwise customary aggregate material, a filling material in the form of Einkorngesteins is used. Under a Einkorngestein is understood to mean a mass consisting of homogeneous round grains. This means that all grains present in the mass have the same grain size and shape within narrow limits. Through the use of such a mass (also referred to as aggregate), the entire space of the introduction of the opening between the existing road and the free-milled or freed shaft can be uniformly - namely filled in the sense of a cubic dense sphere packing. It creates only minimal and also very uniform open spaces between the individual grains of Einkorngesteins. These free spaces can then be filled up with the help of the grouting mortar. Since the clearances are very small and also uniform, even with heavy loads - such as when a truck drives over the manhole cover - it does not break free spaces. Rather, the grains of Einkorngesteins form a stable structural framework.

Overall, this results in a very dense and very solid backfilling, so that the rehabilitated or newly inserted shaft or manhole cover layer forms a good and solid bond with the surrounding street.

When filling the opening, the opening is filled with the filling material and potted with the grouting mortar. Another particular advantage of the invention is that the opening is filled up to its upper edge with the potting compound. It is therefore not necessary to apply to the potting compound additionally a bituminous top layer which must be inserted between the top layer of the road and the manhole cover to complete the backfilling.

It is particularly advantageous that the surface of the filled area by the use of Einkorngesteins after a short time - in contrast, for example, to conventional Betonverfüllungen - gets a roughened structure. This roughened structure is created by the following process: After filling the opening, the einkornstein stone is initially almost completely covered by grout, creating a smooth surface. However, this rubs off after a few Überfahrungsvorgängen so that the individual grains of Einkorngesteins stand out of the surface. However, since these are very fine in the preferred case (see below), the surface of the backfilling is roughened in this way and, in contrast to a conventional concrete surface, is easy to drive. It can be seen that it is no longer necessary to fill in the area to be filled after filling it with its own Cover to provide. Rather, the road surface is formed directly by the existing of the filler and the grout grout.

To fill the opening, two basic approaches are conceivable. So it is conceivable on the one hand that in a first step, the Einkorngestein is filled into the opening and then poured in a second step with the grout. The grout then tightly fills the existing between the structural framework formed by the Einkorngestein free spaces.

On the other hand, it is also conceivable that the Einkorngestein and the grout are mixed together before filling into the opening. The resulting potting compound can then be filled into the opening. To avoid irritation of a motorist when crossing the manhole cover, the potting compound can also be colored accordingly. As a result, the road surface and manhole cover appear as one unit. The manhole cover is thus hardly perceived by the driver.

Depending on the preferred variant, different grouting mortars may be used, for example, epoxy resin compounds can be used for the subsequent filling of the grouting mortar, while lime binders are favorable for the simultaneous filling. In any case, it is favorable if a high-strength material is used as grout and if the grout is a shrink-free material. This additionally supports the stability of the structural framework formed by the einkorngestein.

It is also advantageous if einkorngestein a grain size of 1 mm to 30 mm, preferably 4 mm to 20 mm, particularly preferably from 9 mm to 15 mm, most preferably from 11 mm to 13 mm. Especially when using very fine particle sizes between 11 mm and 13 mm, a structural framework is created which has very fine interspaces and is thus very stable.

Overall, it can be seen that the method according to the invention is suitable both for new road construction and for road rehabilitation. However, its particular advantages come into play especially when the process is a remediation process.

In such a refurbishment method, it is conceivable that the opening in the vertical direction has a cylindrical, stepped or conical shape. The shape is essentially determined by the milling head used.

Particularly favorable is a conical shape, as this can be done by a very good load distribution. In this case, the load acting on the potting compound introduced into the opening - if, for example, a motor vehicle drives over the manhole cover overlay - is diverted via the conical side surfaces into the surrounding roadway area or into the surrounding roadway substructure. The potting compound thus forms a kind of graft, which ensures that the embedded shaft is exposed to only small loads. This protects the shaft and prevents future necessary renovations to a high degree.

However, this advantage of the use according to the invention of a potting compound is by no means limited to openings with a conical shape, but can certainly also be observed in the case of cylindrical or stepped openings.

It can be seen that the opening in the horizontal direction can have a round, square, elliptical or rectangular cross-section.

In a potting compound for casting a manhole cover in a street, the invention provides that the potting compound consists of a filler material and a grout, wherein the filler material is a Einkorngestein. It can be seen already due to the advantages of the method according to the invention described above, that it is advantageous if the grout consists of a high-strength and shrink-free material. In this way, on the one hand renewed subsidence phenomena is effectively prevented. On the other hand, the filled area is very resistant to impacts, bruises and other wear conditions that can affect it by the traffic moving on the road.

Moreover, it is advantageous for the reasons mentioned above, if the einkorngestein a grain size of 1 mm to 30 mm, preferably 4 mm to 20 mm, more preferably from 9 mm to 15 mm, most preferably from 11 mm to 13 mm.

• wobei die Öffnung mit dem Füllmaterial verfüllt und mit dem Vergussmörtel vergossen wird,
• wobei das Füllmaterial ein Einkorngestein ist und
• wobei die aus dem Füllmaterial und dem Vergussmörtel bestehende Vergussmasse bis zur Oberkante der Öffnung eingefüllt wird.

Furthermore, the invention provides with particular advantage the use of a potting compound according to the invention for potting a manhole cover in a street, wherein an opening is introduced into the road around the manhole cover, which opening is closed with the potting compound,

• wherein the opening filled with the filling material and potted with the grout becomes,
• wherein the filler is a Einkorngestein and
• wherein the existing of the filling material and the grout potting compound is filled to the top of the opening.

Fig. 1a

einen Querschnitt durch eine in eine Straße eingelassene und erfindungsgemäß vergossene Schachtabdeckung

Fig. 1b

eine Aufsicht auf die Schachtabdeckung von Fig. 1 a

Fig. 2a

einen Querschnitt durch eine weitere in eine Straße eingelassene und erfindungsgemäß vergossene Schachtabdeckung

Fig. 2b

eine Aufsicht auf die Schachtabdeckung von Fig. 2a

Further features, details and advantages of the invention will become apparent from the wording of the claims and from the following description of exemplary embodiments with reference to the drawings. Show it:

Fig. 1a

a cross section through a recessed into a road and according to the invention potted manhole cover

Fig. 1b

a view of the manhole cover of Fig. 1 a

Fig. 2a

a cross section through another recessed in a road and according to the invention potted manhole cover

Fig. 2b

a view of the manhole cover of Fig. 2a

The Figures 1 a, 1 b, 2 a and 2 b The manhole cover attachment 12 consists of a manhole frame 13 and a concrete ring 14. The manhole cover 12 together with manhole frame 13 and concrete ring 14 serves as a manhole cover 12, 13, 14. The concrete ring 14 surrounds the manhole frame 13 circumferentially and serves to anchor the manhole cover attachment 12th

The shaft 11 and the manhole cover attachment 12 are located in a road 20. Between the road 20 and the shaft 11, in particular the manhole cover attachment 12, an opening 30 has been made, for example for refurbishment. In this way you can inter alia replace the manhole cover attachment 12. The opening 30 is bounded by a tapered side wall 23 of the road 20 and the manhole cover attachment 12, in particular the concrete ring 13.

One recognizes in the Fig. 1 a and 2a that the road 20 has a cover layer 21. In the opening 30, a shoulder 25 is formed in the cover layer 21 before the transition of the road substructure. The shoulder 25 is located approximately at the same height as a concrete ring formed on the shoulder 13 15. In this way, the opening 30 is widened on its side facing the road surface to the shaft cover pad 12 encircling ring 50. The ring 50 becomes bounded on the one hand by the cover layer 21 of the road 20 and on the other hand by the manhole cover rest 12.

In the Fig. 1b and 2 B Looking from above on the recessed in the street 20 manhole cover attachment 12. In all Figures (1a, 1b, 2a and 2b) the opening 30 is filled with a potting compound 40 according to the invention. In the truncated area of the figures, the potting compound 40 occluding the opening 30 is symbolically removed and the peripheral shoulder 25 is recognized.

The potting compound 40 consists of a filling material 41, which is as round as possible and equal sized rock grains (Einkorngestein). This filling material 41 is - due to its homogeneous size distribution and shape - automatically arranged in the closest possible form when filling into the opening 30. In this case, the filling material 41 forms the structural framework of the casting compound 40. The intermediate spaces formed between the individual grains of the filler material 41 are filled with casting mortar 42. In this case, first, the filling material 41 can be filled into the opening 30 in a first embodiment. Thereafter, the grout 42 is filled.

In a second embodiment, filling material 41 and grout 42 are first mixed together. The resulting potting compound 40 is then subsequently filled into the opening.

It can be seen in all figures that the potting compound 40 is filled up to the top edge 24 of the opening 30 and therefore closes as possible in alignment with the cover layer 21 of the road 20. After filling the opening 30 according to the invention, therefore, the surface of the road 20 is not formed by a bituminous covering layer 21, but rather by the potting compound 40 in the region which directly surrounds the manhole cover 12, 13, 14. In this case, one immediately recognizes the following advantages of the invention.

Due to the inventive use of einkorngestein as filling material 41, a stable and wear-resistant structural framework in the potting compound 40 is formed in all areas of the filled opening 30.

In the region of the ring 50, the potting compound 40 takes over the function of the cover layer 21. In this case, with the help of Einkorngesteins after a short time, a certain surface roughness one that allows the safe - especially non-slip - driving on this surface. At the same time, it is not necessary to close the ring 50 in a complicated and complicated manner with hot bituminous material and there is no danger that the surface of the potting compound 40 will detach.

The invention is not limited to one of the above-described embodiments, but can be modified in many ways.

It can be seen that in a method for casting a manhole cover 12, 13, 14 in a street 20, an opening 30 being introduced around the manhole cover 12, 13, 14 into the street 20, which is closed with a potting compound 40, wherein the potting compound 40 is made of a filling material 41 and grout 42, is of particular advantage when the filling material 41 is a Einkorngestein. It is expedient if the opening 30 is filled with the filling material 41 and potted with the grout 42 and when the opening 30 is filled up to its upper edge 24 with the potting compound 40.

In an alternative embodiment variant of the invention, it is also advantageous if the filling material 41 and the grouting mortar 42 are mixed together before being filled into the opening 30.

In any case, it is advantageous if a high-strength material is used as grout 42 and if the grout 42 is a shrink-free material.

It can be seen that a particular advantage of the invention is that the einkorngestein a grain size of 1 mm to 30 mm, preferably 4 mm to 20 mm, more preferably from 9 mm to 15 mm, most preferably from 11 mm to 13 mm having.

It is also favorable if the opening 30 has a cylindrical, stepped or conical shape in the vertical direction and if the opening 30 in the horizontal direction has a round, square, elliptical or rectangular cross section. It is particularly advantageous if the method is a remediation method.

It can be seen that a further advantage of the invention is the provision of a potting compound 40 for potting a manhole cover 12, 13, 14 in a road 20, wherein the potting compound 40 consists of a filling material 41 and a grout 42, wherein the Filler 41 is einkorngestein. Here, too, it is favorable if the grout 42 consists of a high-strength and shrinkage-free material and if the einkorngestein a grain size of 1 mm to 30 mm, preferably 4 mm to 20 mm, particularly preferably 9 mm to 15 mm, most preferably of 11 mm to 13 mm.

It can also be seen the particular advantage of using a potting compound according to the invention 40 for casting a manhole cover 12, 13, 14 in a street 20, wherein around the manhole cover 12, 13, 14 around an opening 30 is introduced into the street 20, with the potting compound 40 is closed, wherein the opening 30 is filled with the filling material 41 and potted with the grout 42, wherein the filling material 41 is Einkorngestein and wherein the existing of the filling material 41 and the grout 42 potting compound 40 filled up to the top edge 24 of the opening 30 becomes.

All of the claims, the description and the drawings resulting features and advantages, including design details, spatial arrangements and method steps may be essential to the invention both in itself and in various combinations.

LIST OF REFERENCE NUMBERS

11

shaft

12

Manhole cover

13

manhole frame

14

concrete ring

15

paragraph

20

Street

21

topcoat

23

Side wall

24

top edge

25

paragraph

30

opening

40

potting compound

41

filling material

42

grout

50

ring

Claims (14)

1. Method of grouting a manhole cover or a gully top (12,13,14) in a road (20), wherein in the road (20) around the manhole cover (12, 13, 14) an opening (30) is inserted which is closed with a grouting compound (40), wherein the grouting compound (40) comprises a filling material (41) and a grouting mortar (42), characterised in that the filling material (41) consists of homogenous-particle rock.
2. Method according to claim 1 characterised in that the opening (30) is filled with the filling material (41) and grouted with the grouting mortar (42).
3. Method according to claim 1 or 2 characterised in that that opening (30) is filled up to its upper edge (24) with the grouting compound (40).
4. Method according to at least one of claims 1 to 3 characterised in that the filling material (41) and the grouting mortar (42) are mixed with each other before filling into the opening (30).
5. Method according to at least one of the claims 1 to 4 characterised in that a high-strength material is used as the grouting mortar (42).
6. Method according to at least one of claims 1 to 5 characterised in that the grouting mortar (42) is a shrinkage-free material.
7. Method according to at least one of claims 1 to 6 characterised in that the homogenous-particle rock has a particle size of 1 mm to 30 mm, preferably 4 mm to 20 mm, particularly preferably of 9 mm to 15 mm, very particularly preferably 11 mm to 13 mm.
8. Method according to at least one of claims 1 to 7 characterised in that in the vertical direction the opening (30) has a cylindrical, stepped or conical shape.
9. Method according to at least one of claims 1 to 8 characterised in that in the horizontal direction the opening (30) has a round, quadratic, elliptical or rectangular cross-section.
10. Method according to at least one of claims 1 to 9 characterised in that the method is a renovation method or new construction method.
11. Grouting compound (20) for grouting a manhole cover (12, 13, 14) in a road (20) characterised in that the grouting compound (40) comprises a filling material (41) and a grouting mortar (42) wherein the filling material (41) is a homogenous-particle rock.
12. Grouting compound according to claim 11 characterised in that the grouting mortar (42) comprise a high-strength and shrinkage-free material.
13. Grouting compound according to one of claims 11 or 12 characterised in that the homogenous-particle rock has a particle size of 1 mm to 30 mm, preferably 4 mm to 20 mm, particularly preferably of 9 mm to 15 mm, very particularly preferably 11 mm to 13 mm.
14. Use of a grouting compound (40) according to at least one of claims 11 to 13 for grouting a manhole cover (12, 13, 14) in a road (20), wherein in the road (20) around the manhole cover (12, 13, 14) an opening (30) is inserted which is closed with the grouting compound (40),

    • wherein the opening (30) is filled with the filling material (41) and grouted with the grouting mortar (42),

    • wherein the filling material (41) is homogenous-particle rock and

    • wherein the grouting compound (40) comprising the filling material (41) and the grouting mortar (42) is filled up to the upper edge (24) of the opening (30).

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