DE202006003409U1 - Support sleeve system especially for tunnel construction has separate sleeve sections locked together via ratchet and groove profiles - Google Patents

Abstract

A support sleeve system especially for tunnel construction in loose terrain has the sections driven into the tunnel face with further sections added via interlocking ratchet profiles. One end of each section has an inner profile with ratchet grip end (13) to clip into an outer groove (13) of the next section. A corresponding ratchet and groove joint can be provided for the outside of the system. The ratchet grips replace conventional threaded connections.

Description

The The present invention relates to a pipe screen for shielding a Tunnel construction against rockfall, with a variety of cladding, which are arranged on the profile circumference of the tunnel structure and themselves essentially longitudinal of the tunnel structure extend through the mountains, at least a cladding tube composed of at least two interconnected Hüllrohrabschnitten is, in each case a threadless, provided with an inner cone Sleeve end and a threadless, provided with an outer cone spigot end and wherein the Hüllrohrabschnitte characterized are connected, that the spigot end of the first Hüllrohrabschnitts in the socket end of the second envelope section is plugged in.

State of technology

It is known when driving tunnels or routes in loose rock or low depths to secure the tunnel or the route through a pipe shield against rockfall. For this purpose, a plurality of cladding tubes is introduced into the mountains at the profile extent of the tunnel structure, which extend substantially longitudinally - usually at an angle of about 5 ° - along the tunnel structure. These ducts are filled with a filling material such as concrete and thus form a line-like net surrounding the tunnel structure. Described is such a pipe shield in the DE 200 09 667 U1 ,

The cladding tubes are introduced into the mountains using a double-tube drilling method - impact or rotary impact drilling. In this case, a drilling crown is driven by a rotary hammering via an inner rod by the hammer drill and at the same time draws a coaxially arranged to the drill string cladding tube in the resulting hole in it to line it from the inside. After the bore has been lowered, the inner linkage and possibly also the drill bit are removed, but the cladding tube remains in the borehole and cement is filled. Such a double-tube drilling method is in the AT 407895 B described.

Since very long sheaths are associated with large drill hole depths, these are usually composed of several interconnected Hüllrohrabschnitten for better handling. The drill guide, which brings down the holes for the pipe screen, is equipped with a magazine from which the individual Hüllrohrabschnitte are removed one after the other and then joined together. A drill carriage when making a pipe screen is in 1 shown.

1 : Drill mount for pipe screen drilling (prior art).

It exist different concepts, the ducts of a pipe umbrella with each other connect to. Widely used are screwed pipe connections, where the ducts each have an inner or an external thread on each end. The internal thread is in the external thread screwed. Disadvantage of this screwed ducts is that this solve each other can, when the drill bit is turned backwards must become. This is the case when the drill bit gets stuck. Nice partially dissolved Assets screwed no longer the required bending moments between the Hüllrohrabschnitten transferred to, so the carrying capacity of the pipe shield is not given at this point. Usually must then be re-drilled.

There are also known helically connected ducts known. So is one of the AT 407895 B known drilling method uses a separate coupling piece, which connects two abutting cladding tubes together. Disadvantage of this solution is that with the coupling elements in addition to the Hüllrohrabschnitten other components must be introduced into the well and handled accordingly. In addition, such coupling elements can transmit only low bending moments.

Furthermore, DE 10 2004 020 065 B3 discloses a tube connection suitable for pipe screen drilling, in which the casing tube sections each have a spigot end and a socket end. The outer conical end of the pin is inserted into the inner conical sleeve end, so that a frictional connection between the Hüllrohrabschnitten without additional coupling elements. However, this solution provides a plastic deformation of the wall of the socket end in such a way that inwardly pressed material engages in provided grooves of the pin end and thus forms an additional, non-releasable positive connection with the necessary strength. Disadvantage of this solution is the inherent radial compression of the material of the socket end. For this purpose, a large-area device is required, which must be arranged on the drill carriage. As in 1 As can be seen, in the region marked "A", at the outermost edge of the working face, where the cladding tube sections are connected to each other, there is only limited space, so that an arrangement of a crusher becomes structurally difficult., Unfortunately, the low tube screen angles of about 5 ° can not The device for pressing the Hüllrohrabschnitte also increases the weight to be moved by the carriage considerably, so that the movement hydraulics of the carriage must be upgraded accordingly.

task

Of the The present invention is therefore based on the object, a pipe screen in such a way that its individual sections of sheath pipe threadless, without the aid of additional coupling elements and without an additional, expansive Let the crimping device bond permanently.

solution

This succeeds in that the spigot end with at least one, radially over the Outer cone protruding Nose is provided that the spigot end on its outside continue with at least one, radially behind the outer cone receding Zapfennut is provided, the outer cone exclusively between Spigot and nose extends, and that the socket end with a radially behind the back of the inner cone Muffennut is provided, in which the nose engages.

In the pipe shield according to the invention the cladding tubes are thus joined positively by a snap connection formed from nose and sleeve groove. A plastic deformation of the sleeve material does not take place because the pin end thanks to the pin groove, which reduces the moment of resistance of the pin end deformed when pushed together only in the elastic region and finally engages with the nose resiliently in the sleeve groove. For this reason, no additional pressing device is needed. Rather, the ducts can be added either with the already present on the drill mount hammer feed or alternatively with a specially provided for this linear cylinder. Such a linear cylinder could extend along the drill carriage and would thus not in the narrow, in 1 Protruding with "A" drawn workspace.

It be made clear that the ducts the pipe shield according to the invention not only form-fitting over the in the sleeve groove latching nose, but also force fit over the inserted into each other cones are. The tension in the conical seat is favored by the fact that the outer cone exclusively extends between pin groove and nose. When building the pipe screen Thus, it is ensured that the Hüllrohrabschnitte itself at Walk backwards Do not disassemble the drill bit and always do the necessary Transmitted bending moment. Additional coupling elements omitted.

The present invention to execute in two variants, namely in the already described first variant according to claim 1, in which the nose is at the spigot end. In the second embodiment according to claim 3 is the nose at the socket end and snapped into a corresponding Pin groove on the outer cone one.

If the nose according to the embodiment 1 located at the spigot end, it is advantageous to slit this axially, so that the noses formed by the slot when pushed together spring in better. The better compression behavior allows the use a larger, radial further protruding nose, which in turn thanks to their larger contact surface a better power transmission allowed between pin end and socket end.

embodiments

The The present invention will now be described with reference to two embodiments be explained in more detail. Therefor demonstrate:

1 : Drill carriage in pipe screen drilling (prior art);

2a : Hüllrohrabschnitte according to Embodiment 1 without;

2 B : Cladding tube sections according to Embodiment 1 joined;

3a : Hüllrohrabschnitte according to Embodiment 2 unfounded;

3b : Cladding tube sections according to Embodiment 2 joined.

The building of a pipe screen 1 when driving up a tunnel structure 2 in the mountains 3 is in 1 shown. This will be at the working face 4 of the tunnel structure 2 a variety of ducts 5 essentially along - ie at an angle of about 5 ° - along the profile circumference of the tunnel structure 2 by means of a drill carriage 6 in the mountains 3 brought in. The ducts 5 are filled after removal of the inner drill string with cement and thus guide the above-pending rock pressure around the profile of the tunnel structure 2 around. The face chest 4 will continue to be driven forward when the last introduced ducts 5 are sustainable.

The ducts 5 are from a plurality of interconnected Hüllrohrabschnitten 7 composed. The assembly takes place with a corresponding handling device of the drill carriage 6 , This removes the Hüllrohrabschnitte 7 from a magazine and connecting them together by placing one on the next tube section 7 located spigot end 8th in a on the previous Hüllrohrabschnitt 7 located sleeve end 9 pocketing.

pin end 8th and Muff's End 9 a first embodiment of the ducts 7 the pipe shield according to the invention 1 are in the 2a and 2 B shown. Each envelope section 7 has a spigot end 8th and a muffing end 9 , The casing pipe sections 7 are connected by the spigot end 8th of the first envelope section 7 (in 2a left) into the socket end 9 of the second envelope section 7 (in 2a right) is inserted.

2 B shows two nested tube sections 7 , The power transmission takes place on the one hand non-positively via a conical seat, which consists of an outer cone 10 at the end of the spigot 8th and from an inner cone 11 at the end of the muff 9 composed. In addition, one at the spigot end snaps 8th located nose 12 in one at the end of the muff 9 located sleeve groove 13 one. This creates an additional positive connection between the Hüllrohrabschnitten 7 ,

For connected casing pipe sections 7 is the spigot end 8th deformed only in the elastic range. The stretching when pushed together is in the area of a peg groove 14 largest, since the Hüllrohrabschnitt has in this area its lowest moment of resistance. In addition, the spigot end 8th axially slotted, so that on the circumference of the pin end 8th several noses 12 arise when inserted into the socket end 9 compress under a smaller amount of force; see. 2a ,

After one in the 3a and 3b illustrated, the second embodiment of the invention is the nose 12 at the end of the muff 9 of the cladding tube section 7 arranged. In the assembled state, the nose snaps 12 in a peg groove 14 at the end of the spigot 8th the adjacent Hüllrohrabschnitts 7 one. When in 3a shown pushing together the Hüllrohrabschnitte 7 creates the largest strain in the area of the sleeve groove 13 ,

Claims (3)

Pipe umbrella ( 1 ) for shielding a tunnel structure ( 2 ) against rockfall, a) with a plurality of cladding ( 5 ) at the perimeter of the tunnel structure ( 2 ) are arranged substantially along the tunnel structure ( 2 ) through the mountains ( 3 ), b) at least one cladding tube ( 5 ) from at least two interconnected Hüllrohrabschnitten ( 7 ), each having a threadless, with an inner cone ( 11 ) provided socket end ( 9 ) and a threadless, with an outer cone ( 10 ) provided spigot end ( 8th ), c) and wherein the Hüllrohrabschnitte ( 7 ) are connected by the spigot end ( 8th ) of the first envelope pipe section ( 7 ) into the socket end ( 9 ) of the second envelope section ( 7 ) is inserted, characterized in that d) that the pin end ( 8th ) at least one, radially over the outer cone ( 10 ) protruding nose ( 12 ), e) that the spigot end ( 8th ) on its outside at least one, radially behind the outer cone ( 10 ) projecting pin groove ( 14 f) wherein the outer cone ( 10 ) exclusively between peg groove ( 14 ) and nose ( 12 ), g) and that the socket end ( 9 ) one radially behind the inner cone ( 11 ) projecting sleeve groove ( 13 ) into which the nose ( 12 ) engages. Pipe umbrella ( 1 ) according to claim 1, characterized in that the spigot end ( 8th ) is axially slotted. Pipe umbrella ( 1 ) for shielding a tunnel structure ( 2 ) against rockfall, a) with a plurality of cladding ( 5 ) at the perimeter of the tunnel structure ( 2 ) are arranged substantially along the tunnel structure ( 2 ) through the mountains ( 3 ), b) at least one cladding tube ( 5 ) from at least two interconnected Hüllrohrabschnitten ( 7 ), each having a threadless, with an inner cone ( 11 ) provided socket end ( 9 ) and a threadless, with an outer cone ( 10 ) provided spigot end ( 8th ), c) and wherein the Hüllrohrabschnitte ( 7 ) are connected by the spigot end ( 8th ) of the first envelope pipe section ( 7 ) into the socket end ( 9 ) of the second envelope section ( 7 ) is inserted, characterized in that d) that the socket end ( 9 ) at least one, radially over the inner cone ( 11 ) protruding nose ( 12 ), e) that the socket end ( 9 ) on its inside at least one, radially behind the inner cone ( 11 ) projecting sleeve groove ( 13 ), f) wherein the inner cone ( 11 ) exclusively between Muffennut ( 13 ) and nose ( 12 ), g) and that the spigot end ( 8th ) a radially behind the outer cone ( 10 ) projecting pin groove ( 14 ) into which the nose ( 12 ) engages.