DE8531032U1 - Knife shield tunnelling device - Google Patents

Description

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30.10.1985 Qu/Schu GW 8546

Patent application

the company

Union Eisenhütte Westfalia, 4670 LÜnen

Knife shield tunnelling device

The invention relates to a cutter shield tunneling device, in particular for driving underground cavities of great width, with interconnected support frames arranged next to one another transversely to the direction of advance, on which tunneling cutters rest, which can be moved by means of a thrust piston gear.

For the excavation of tunnels, galleries or other underground routes, knife shields are known in which the driving blades rest on a support frame and can be driven forward using hydraulic feed cylinders. The support frame forms the abutment for the presses. As is known, such knife shields are self-propelling, i.e. they do not require an additional abutment such as the tunnel lining or similar for their forward movement, but use the friction that occurs between the surrounding soil and the driving blades as a propelling abutment.

In order to be able to use such blade shields to drive into large underground cavities, such as underground railway stations, underground car parks, etc., it has already been proposed (DE-OS 27 06 024) to arrange several of these blade shields next to each other. The individual blade shields have a:

preferably have a rectangular cross-section and are connected to one another via walking gear. Knife shield tunnelling devices designed in this way are perfectly suitable for driving underground cavities of great width and relatively great height, but cannot be used if the clear height to be driven is to be as low as possible, e.g. less than 1.6 m.

Such low drive-up heights are desirable, for example, when blade shield tunneling devices are to be used to drive under waste disposal sites or similar sites, in order to pull environmental protection foils or similar under the landfill sites in order to isolate these or the toxic substances that are released from the groundwater. The tunneling device known from DE-OS 27 06 024 has 4 bottom and 4 hanging blades per blade shield segment. The two middle tunneling blades only rest on the horizontal cross-belts of the support frames and thus transfer strong bending forces into the support frames. The cross-belts of such structures must therefore be very strongly dimensioned, which significantly limits access to the face. The previously known design of such blade shield tunneling devices is therefore hardly suitable for a tunneling device with which a relatively low clearance height is to be driven.

The invention is therefore based on the object of creating a knife shield tunneling device of the aforementioned type, which makes it possible to economically excavate underground cavities of great width and relatively low clearance height, whereby the clearance width within the knife shield tunneling device should remain as large as possible in order to be able to install mining equipment and/or other additional equipment.

This object is achieved according to the invention in that the tunneling blades arranged in the ridge and/or base area are designed as one-piece constructions which are slidably mounted on vertical support frame walls.

The one-piece hanging or sole blades, preferably designed as a box-like welded construction, are dimensioned so that the forces acting on the construction from the hanging or footing

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are directed directly onto the vertical support frame walls, i.e. the supporting frame structure consists of the vertical support frame walls and the tunnelling blades themselves, which slide along the support frame walls. The cross braces arranged in the ridge and base area of the support frame walls remain unaffected by these forces and can therefore be relatively weakly dimensioned. In the area above and below the cross braces cover plates are arranged, which close off the base and ridge area, except for two window openings at the top and two window openings at the bottom.

The hanging wall and bottom cutters have sliding guides on the outer edge of their undersides facing the center of the shield, with which they rest over a large area on the vertical support frame walls. The hanging wall and bottom cutters can be actuated by double-acting thrust piston gears, which are supported on the support frame walls via fastening brackets and are coupled to the tunneling cutters via connecting brackets.

In order to ensure the principle of the knife shield, at least two knife shields are connected via their support frames. The support frames are connected to one another via connecting connections embedded in the support frame walls. The support frame walls also have access openings that allow continuous access to the knife shields arranged next to one another.

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Further details of the invention can be found in an embodiment shown below with reference to the drawings. They show:

Figure 1 shows the knife shield according to the invention in longitudinal section along line II-II of Figure 2,

\ Figure 2 is a front view of the knife shield according to the invention, the left half being shown according to section II of Figure 1,

Figure 3 is a plan view of the tunnelling device according to the invention, without tunnelling blades and partly in horizontal section,

Figure 4 shows a knife shield propulsion device consisting of three interconnected knife shields according to the invention.

The knife shield propulsion device 26 shown in Figure 4 consists of several knife shields 1, 2, 3 etc. arranged next to one another transversely to the propulsion direction V, the support frames 4 of which are rigidly connected via connecting connections 15. To connect the support frames 4, the support frame walls 8, 9 have connecting connections 15, consisting of centering devices 16 and segment connecting means 17. In order to be able to exploit the advantages of the knife shield principle, it is recommended to use at least three of these knife shields 1, 2,

3 to screw together.

The individual blade shield 1 (particularly visible in Figures 1 and 2) consists of a support frame 4 on which the driving blades 5 rest. The driving blades 5 are designed as large-area, one-piece hanging blades 6 or sole blades 7, which rest directly on the vertical support frame walls 8, 9 of the support frame 4. The support frame walls 8, 9 are connected in the area of the roof and the sole by relatively weakly dimensioned cross braces 10 and 11 respectively. In addition, cover plates 12, 13 are inserted between these cross braces 10, 11 and the driving blades 5, which support the support frame

4 Close at the top and bottom except for window openings 22.

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The vertical support frame walls 8, 9 have central access openings 14 as well as connecting connections 15. These connecting connections 15 advantageously consist of a centering device 16 and segment connecting means 17.

The tunnelling cutters 5 resting on the support frame walls 8, 9 are actuated by thrust piston gears 19, which are supported on the one hand on fastening brackets 18 of the support frame walls 8, 9 and on the other hand are connected to the hanging edge cutter 6 or the base cutter 7 via their piston rod head 20 or the connecting brackets 21. The connecting brackets 21 pass through the window openings 22 in the cover plates 12, 13. The tunnelling cutters 5 also have sliding guides 23 on their undersides facing the middle of the shield and rest with these sliding guides 23 over a large area on the support frame walls 8, 9. The sliding guides 23 are surrounded by claws 24, which are arranged on the front sides 25 of the support frame walls 8, 9. The claws 24 form the lateral guide for the driving blades 5 and also prevent the driving blades 5 from being lifted by, for example, material that has penetrated the support frame walls 8, 9.

In a further embodiment of the invention, the support frame 4 is designed to be telescopic. In this case, the support frame 4 consists of a support frame upper part and a corresponding support frame lower part, which are guided into one another like drawers and can be telescoped via spreading cylinders.

30.10.1985 Qu/Schu GW 8546

Reference number list

1 knife shield

2 Knife shield

3 Knife shield

4 support frames

5 tunnel cutters

6 hanging knives

7 sole knives

8 Support frame wall

9 Support frame wall

10 Cross bracing

11 Cross-bracing

12 Cover sheet

13 Cover plate

14 Access opening

15 Connection port

16 Centering device

17 Segment fasteners

18 Mounting bracket

19 Thrust piston gear

20 Piston rod end

21 Connection console

22 Window opening

23 Sliding guide

24 Clawing

25 Front side

26 Knife shield propulsion device V Propulsion direction

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Claims (10)

■ 1 ■■ 30.10.1985 Qu/Schu GW 8546 ■Claims 1. Blade shield tunnelling device, in particular for driving underground cavities of great width, with interconnected support frames arranged next to one another transversely to the direction of advance, on which tunnelling blades rest which can be displaced by means of thrust piston gears, characterized in that the tunnelling blades (5) arranged in the roof and/or bottom area are designed as one-piece constructions which are displaceably mounted on vertical support frame walls (8, 9). 2. Knife shield tunnelling device according to claim 1, characterized in that the vertical support frame walls (8, 9) are stabilised in the ridge and base area by cross braces (10, 11) which are weakly dimensioned in relation to the support frame walls (8, 9). 3. Knife shield tunnelling device according to claim 1, characterized in that the tunnelling knives (5) designed as a one-piece hanging end knife (6) or as a one-piece bottom knife (7) can be actuated by thrust piston gears (19) which are connected on the one hand via fastening brackets (1?) to the support frame walls (8) or (9) and on the other hand via piston rod heads (20) or connection brackets (21) to the tunnelling knives (5). 4. Knife shield propulsion device according to claim 1 and 2, characterized in that the cross braces (10, 11) connecting the support frame walls (8, 9) are covered by cover plates (12, 13), the cover plates (12, 13) having window openings (22) for the connection brackets (21) to pass through. - 5. Knife shield propulsion device according to one or more of the ■, preceding claims, characterized in that central access openings (14) and connecting connections (15) are arranged in the support frame walls (8, 9). 6. Knife shield propulsion device according to one or more of the preceding claims, characterized in that the connecting connections (15) have a centering device (16) and segment connecting means (17). 7. Knife shield propulsion device according to one or more of the preceding claims, characterized in that the hanging or bottom knives (6, 7) resting on the support frame walls (8, 9) are equipped with sliding guides (23) and rest over a large area on the front sides (25) of the support frame walls (8, 9). 8. Knife shield propulsion device according to one or more of the preceding claims, characterized in that the sliding guides (23) of the hanging wall or sole knives (6, 7) are guided in lateral wedges (24) which are arranged on the front sides (25) of the support frame walls (8, 9). 9. Knife shield propulsion device according to claim 1, characterized in that the support frames (4) of at least three knife shields (1, 2, 3) are connected via the connecting connections (15) to form a rigid knife shield propulsion device (26). 10. Knife shield propulsion device according to claim 1, characterized in that the vertical support frame walls (8, 9) each consist of a support frame upper part and a support frame lower part, which are guided into one another like drawers and are telescopic via spreading cylinders.