Abstract
The invention relates to a device (1) for producing a hollow-cylindrical concrete lining (50) on shaft walls (100) of vertical shafts (101), having at least one shuttering element (2) which is radially spaced from the shaft wall (100) and forms a concrete shuttering, a supporting ring (3) at the lower end of the shuttering element (2), and a sealing assembly (4) in the region of the supporting ring (3) to seal the concrete shuttering relative to the shaft wall (100), wherein the sealing assembly (4) is formed by a plurality of drawers (5, 5a, 5b) which can be extended radially against the shaft wall (100).
Claims
1. Device for producing a hollow-cylindrical concrete lining on shaft walls of vertical shafts, having at least one shuttering element which is radially spaced from the shaft wall and forms a concrete shuttering, a supporting ring at the lower end of the shuttering element, and a sealing assembly in the region of the supporting ring to seal the concrete shuttering relative to the shaft wall, wherein the sealing assembly is formed by a plurality of drawers which can be extended radially against the shaft wall.
2. Device according to claim 1, wherein the drawers, driven by way of drives, can be extended and retracted relative to the supporting ring.
3. Device according to claim 2, wherein the drives are hydraulic, electric or pneumatic drives.
4. Device according to claim 2, wherein each drawer is assigned a separate drive.
5. Device according to claim 1, wherein the drawers each form partial arc segments of an arcuate sealing assembly.
6. Device according to claim 1, wherein drawers arranged next to one another form common regions of overlap.
7. Device according to claim 6, wherein the regions of overlap are each formed along the periphery of an arcuate sealing assembly between two adjacently-arranged drawers.
8. Device according to claim 6, wherein the regions of overlap form sealing of the concrete shuttering between the drawers.
9. Device according to claim 1, wherein the drawers are provided with sealing elements which effect sealing relative to the shaft wall.
10. Device according to claim 9, wherein the sealing elements are arranged on radially outer faces of the drawers, wherein the sealing elements are trapped between the shaft wall and drawers by extending the drawers against the shaft wall and thus effect sealing of the concrete shuttering.
11. Device according to claim 10, wherein that the sealing elements follow the extension movement of the drawers and thus adapt to the contour of the shaft wall.
12. Device according to claim 9, wherein the sealing elements form a seal ring which is continuous around the supporting ring.
13. Device according to claim 9, wherein the sealing elements are formed from an elastically extensible material.
14. Device according to claim 1, wherein the drawers comprise coverings, wherein the coverings form the upper side of the drawers and close off the concrete shuttering from below.
15. Device according to claim 14, wherein the coverings are formed from a plastics material.
Description
[0021] Further features, details and advantages of the invention will become apparent on the basis of the following description and with reference to the drawings, which show examples of embodiment of the invention. Objects or elements which correspond to one another are provided with the same reference numerals in all the figures. Therein:
[0022] FIG. 1 shows a device according to the invention in a shaft,
[0023] FIG. 2 is a perspective view of the device,
[0024] FIG. 3 is a sectional view of the device,
[0025] FIG. 4 shows a drawer,
[0026] FIG. 5 shows a region of overlap of two drawers, and
[0027] FIG. 6 is a perspective view of the device, with an alternative arrangement of the sealing elements.
[0028] In FIG. 1, a device according to the invention is illustrated, designated by the reference numeral 1. The device 1, a section of which is illustrated, serves for producing a hollow-cylindrical concrete lining 50 on the shaft wall 100 of a vertically-running shaft 101. The section shown corresponds to an arcuate section of the device 1, which overall is arcuate. Such a shaft 101 as a rule is drilled into the ground and the rock when sinking a shaft in order to open up deposits in mining. When being produced, the shaft 101 can however also be cut or blasted into the ground and the rock. Usually a concrete lining 50 is applied to the shaft walls 100 to fortify the shaft walls 100. Such a concrete lining 50 as a rule is produced in portions by arranging concrete shuttering in the shaft 101. With such concrete shuttering, the hollow-cylindrical concrete lining 50 is produced in portions on the shaft walls 100. To this end, the device 1, once a portion which has been produced has set, is displaced further downwards in the shaft 101 in order to produce the next portion of the concrete lining 50. If this is set, the device 1 is lowered still further downwards in the shaft 101 to form a further portion of the concrete lining 50. To form the hollow-cylindrical concrete lining 50, the device 1 comprises a shuttering element 2 radially spaced from the shaft wall 100. This hollow-cylindrical shuttering element 2, when the concrete lining 50 is being produced, is arranged coaxially in the circular shaft 101 relative to the shaft wall 100. At the lower end of the shuttering element 2 there is arranged a supporting ring 3 which supports the shuttering element 2 from below. In the region of the supporting ring 3, a sealing assembly 4 is provided to seal the concrete shuttering relative to the shaft wall 100. With the sealing assembly 4, the concrete shuttering is sealed on its underside relative to the shaft wall 100. As a result, the concrete shuttering formed by the shuttering element 2 is closed off in the lower region by the sealing assembly 4. On the device according to the invention, the sealing assembly 4 is formed by a plurality of drawers 5, 5a, 5b which can be extended radially against the shaft wall 100. This makes rapid and easy sealing of the concrete shuttering relative to the shaft wall 100 possible. The drawers 5, 5a, 5b are preferably driven individually by way of drives 6, 6a, 6b and thus moved relative to the supporting ring 3. In the example of embodiment shown, the drives 6, 6a, 6b are designed as hydraulically-driven cylinder pistons. With this type of drive, the drawers 5, 5a, 5b can be moved against the shaft wall 100 and thus permit rapid and easy sealing relative to the shaft wall 100. The individual drawers 5, 5a, 5b of the sealing assembly 4 each form partial arc segments of a circular arc which closes off the concrete shuttering relative to the shaft wall 100 from below. Sealing relative to the shaft wall 100 can be obtained by way of the separately extendable partial arc segments of the individual drawers 5, 5a, 5b.
[0029] FIG. 2 shows a perspective view of the device 1 of FIG. 1, a section of which is illustrated. It is apparent from this view that the drawers 5, 5a, 5b are provided with sealing elements 8a, 8b, 8c which effect sealing relative to the shaft wall 100 (FIG. 1). Each drawer 5, 5a, 5b is assigned its own, separate sealing element 8a, 8b, 8c. To this end, the sealing elements 8a, 8b, 8c are arranged on the radially outer faces of the drawers 5, 5a, 5b. Preferably, the sealing elements 8a, 8b, 8c are screwed onto the radially outer faces of the drawers 5, 5a, 5b. By extending the drawers 5, 5a, 5b, the sealing elements 8a, 8b, 8c are pressed against the shaft wall 100 (FIG. 1). In this case, the sealing elements 8a, 8b, 8c are trapped between the drawers 5, 5a, 5b and the shaft wall 100 (FIG. 1) and thus seal the concrete shuttering against the emergence of liquid concrete. With the arrangement of the sealing elements 8a, 8b, 8c on the radially outer faces of the drawers 5, 5a, 5b, they follow the extension movement of the drawers 5, 5a, 5b and adapt to the contour of the shaft wall 100 (FIG. 1). It is further apparent from FIG. 2 that the sealing elements 8a, 8b, 8c arranged on the drawers 5, 5a, 5b are connected together and form a continuous seal ring 8 running around the entire supporting ring 3. The material of the sealing elements 8a, 8b, 8c is elastic and extensible, so that accurate adaptation to the contour of the shaft wall 100 when the sealing elements are trapped between the shaft wall 100 and the drawers 5, 5a, 5b is made possible. On the drawers 5, 5a, 5b there are furthermore preferably arranged coverings 9, 9a, 9b of plastics material which form the upper side of the drawers 5, 5a, 5b. These coverings 9, 9a, 9b close off the concrete shuttering tightly from below. The use of plastics-material coverings prevents the set concrete from adhering to the retractable and extendable drawers 5, 5a, 5b.
[0030] FIG. 3 shows a sectional view through the device of FIGS. 1 and 2 in the peripheral direction. It can readily be recognized in this illustration how the drawers 5, 5a, 5b extended against the shaft wall 100 press the sealing elements 8, 8a, 8b (FIG. 2) arranged on the radially outer faces of the drawers 5, 5a, 5b against the shaft wall 100. The sealing elements 8a, 8b, 8c (FIG. 2) trapped between the drawers 5, 5a, 5b and the shaft wall 100 thus ensure reliable and rapid sealing of the concrete shuttering, so that once the drawers 5, 5a, 5b have been extended against the shaft wall 100 the filling of the concrete shuttering with liquid concrete can be begun promptly in order to produce the concrete lining 50 in the portion. The elastically extensible material of the sealing elements 8a, 8b, 8c ensures reliable sealing between the drawers 5, 5a, 5b and the shaft wall 100. The coverings 9, 9a, 9b preferably arranged on the upper side on the extendable drawers 5, 5a, 5b represent a closure of the concrete shuttering from below and prevent set concrete from adhering. Thus the drawers 5, 5a, 5b, once the portion of the concrete lining 50 has set, can be retracted and the device 1 can be easily displaced in the shaft 101.
[0031] An individual drawer 5 of the device 1 (FIG. 1) can be seen from FIG. 4. In this illustration, it can clearly be recognized that the drawer 5 forms a partial arc segment of the arcuate sealing assembly 4 (FIG. 1) on the supporting ring 3 (FIG. 1). This partial arc segment has a sealing element 8a arranged on the radially outer face of the drawer 5. This sealing element 8a, when the drawer 5 is extended by way of the hydraulic drive 6 shown, is pressed against the shaft wall 100 (FIG. 1) and thus seals the concrete shuttering. On the upper side of the drawer 5 there can additionally be recognized the covering 9 formed from plastics material, which prevents adhesions of the setting concrete to the extended drawer 5. The drawers 5, 5a, 5b of the device 1 are preferably all constructed identically.
[0032] FIG. 5 shows the region of overlap 7 between two drawers 5, 5a of the arcuate sealing assembly 4 (FIG. 1) which are arranged next to each other. The regions of overlap 7, 7a are formed in each case along the periphery of the sealing assembly 4 (FIG. 2) between two adjacently-arranged drawers 5, 5a, 5b. Due to the overlapping of the drawers 5, 5a in the region of overlap 7, sealing of the concrete shuttering between the drawers 5, 5a is achieved. Even when the drawers 5, 5a are completely extended, the region of overlap 7 closes off the concrete shuttering from below and thus prevents liquid concrete from penetrating between the extended drawers 5, 5a and setting there.
[0033] FIG. 6 shows a perspective view of the device 1 of FIG. 1, a section of which is illustrated. It is apparent from this view that the drawers 5, 5a, 5b are provided with sealing elements 8a, 8b, 8c which effect sealing relative to the shaft wall 100 (FIG. 1). For sealing element 8a, 8b, 8c which are arranged offset are associated with drawers 5, 5a, 5b, which sealing elements overlap the drawers 5, 5a, 5b in each case. To this end, the sealing elements 8a, 8b, 8c are arranged on the radially outer faces of the drawers 5, 5a, 5b. Preferably, the sealing elements 8a, 8b, 8c are screwed to the radially outer faces of the drawers 5, 5a, 5b. By extending the drawers 5, 5a, 5b, the sealing elements 8a, 8b, 8c are pressed against the shaft wall 100 (FIG. 1). In this case, the sealing elements 8a, 8b, 8c are trapped between the drawers 5, 5a, 5b and the shaft wall 100 (FIG. 1) and thus seal the concrete shuttering against the emergence of liquid concrete. With the arrangement of the sealing elements 8a, 8b, 8c on the radially outer faces of the drawers 5, 5a, 5b, they follow the extension movement of the drawers 5, 5a, 5b and adapt to the contour of the shaft wall 100 (FIG. 1). With the illustration of FIG. 6 it can be recognized that the sealing elements 8a, 8b, 8c arranged offset to the drawers 5, 5a, 5b, in the case of drawers 5, 5a which are extended to different distances, wind along the offset formed thereby and beyond the offset form an S-shaped curve, since the sealing elements 8a, 8b, 8c extend beyond the region of overlap 7 of the drawers 5, 5a, 5b over two adjacent drawers 5, 5a, 5b. It is furthermore apparent from FIG. 6 that the sealing elements 8a, 8b, 8c arranged on the drawers 5, 5a, 5b are connected together and form a continuous seal ring 8 running around the entire supporting ring 3. The material of the sealing elements 8a, 8b, 8c is elastic and extensible, so accurate adaptation to the contour of the shaft wall 100 when the sealing elements are trapped between the shaft wall 100 and the drawers 5, 5a, 5b is made possible. On the drawers 5, 5a, 5b there are furthermore preferably arranged coverings 9, 9a, 9b of plastics material which form the upper side of the drawers 5, 5a, 5b. These coverings 9, 9a, 9b close off the concrete shuttering tightly from below. The use of plastics-material coverings prevents the set concrete from adhering to the retractable and extendable drawers 5, 5a, 5b.
LIST OF REFERENCE NUMERALS
List of Reference Numerals
[0034] 1 device [0035] 2 shuttering element [0036] 3 supporting ring [0037] 4 sealing assembly [0038] 5 5a 5b drawer [0039] 6 6a 6b drive [0040] 7 7a region of overlap [0041] 8 seal ring, 8a 8b 8c sealing element [0042] 9 9a, 9b covering [0043] 50 concrete lining [0044] 100 shaft wall [0045] 101 shaft
