EP0227727A1 - Dispositif expansible, applicable en particulier au clavage dans les constructions et les ouvrages de genie civil - Google Patents
Dispositif expansible, applicable en particulier au clavage dans les constructions et les ouvrages de genie civilInfo
- Publication number
- EP0227727A1 EP0227727A1 EP19860903445 EP86903445A EP0227727A1 EP 0227727 A1 EP0227727 A1 EP 0227727A1 EP 19860903445 EP19860903445 EP 19860903445 EP 86903445 A EP86903445 A EP 86903445A EP 0227727 A1 EP0227727 A1 EP 0227727A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sleeve
- frustoconical
- cavity
- bodies
- joint
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000010276 construction Methods 0.000 title claims description 7
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000004567 concrete Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 3
- 230000004044 response Effects 0.000 claims description 2
- 241001494487 Anchon Species 0.000 claims 1
- 239000002184 metal Substances 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/08—Wrecking of buildings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C37/00—Other methods or devices for dislodging with or without loading
- E21C37/04—Other methods or devices for dislodging with or without loading by devices with parts pressed mechanically against the wall of a borehole or a slit
Definitions
- Expandable device applicable in particular to cla ⁇ vage in civil engineering constructions and ouyrages.
- Expandable devices of the com ⁇ type are already known, carrying an initially cylindrical surface, provided with longitudinal slots allowing it to deform by becoming frustoconical when a conical core is pressed into it.
- the device further comprises two frustoconical bodies, of conicity corresponding to those of the bore, and placed towards the extremi ⁇ ties thereof, and means for bringing the two frustoconical bodies together, for example an axial threaded rod which screws into one of the frusto-conical bodies and bears on the other using a head with which it is provided.
- the device is introduced into a housing of generally square shape, which extends into one and the other of the parts which it is to immobilize.
- This device has a drawback due to the fragile nature of the material of which the sleeve is made: the rupture of the bridges is a phenomenon which it is impossible to control and which does not take place simultaneously for all the bridges. This results in momentary deformations of the sleeve when certain bridges are broken then that the others still exist. In the case of metal parts, these deformations are compensated for below, when all the bridges have been broken, by sliding against the walls of the housing. In the case where the mass of masonry or concrete has to be claved, such sliding is impossible, and the clamp therefore risks being defective.
- the square shape of the section of the sleeve means that the housing has to be given a corresponding shape. This does not pose any difficulty in the case provided for in the aforementioned bre ⁇ vet, where this shape can be obtained by milling a groove from the surface of each metal part which must face the other part. . On the other hand, this is almost impossible in the case of civil engineering works, especially if the accessible surface is perpendicular to the faces opposite the parts to be keyed.
- the object of the invention is to provide an ex ⁇ pansible keying device which does not require the preparation of cavities of shape which is difficult to obtain, which ensures suitable tightening even when the nature of the walls of la'cavotti opposes any slippage, which is however recoverable and reusable, and of low cost.
- Another object of the invention is to provide such a device which can adapt to a subsequent enlargement of the cavity, without eliminating the tightening.
- Yet another object of the invention is to provide a method for establishing or restoring by keying a structural continuity between two construction elements which is simple and effective.
- the invention provides an expandable keying device intended to be introduced then clamped in a cavity which is formed on both sides of a joint between two parts which it is desired to immobilize, and comprising a sleeve of external shape adapted to that of the cavity, traversed by a bore comprising two frustoconical parts which narrow towards the center, this sleeve having at least one first longitudinal slot which completely crosses its wall and extends between a first end of the sleeve and the vicinity of the second end of the sleeve, and at least one second longitudinal slot which completely crosses its wall and extends between the second end of the sleeve * and the vicinity of the first end ; two opposite frustoconical bodies of a shape adapted to that of the frustoconical parts of the bore of the sleeve; and means for bringing the two frustoconical bodies closer to each other; characterized in that the sleeve and the cavity are of cylindrical shape
- the means to bring the body frustoconical comprise means for exerting on the body frustoconical a permanent force, able to create a further approximation of said frustoconical body in response to a subsequent enlargement of the cavity
- the means for approxi ⁇ expensive frustoconical bodies include a threaded rod secured to one of the frustoconical bodies, a nut which * screws onto this threaded rod, and at least one pressure washer interposed between the nut and the other sectional body.
- the device comprises at least three first slots and at least three second slots, the first and second slots being arranged in an alternating manner and regularly distributed over the lateral surface of the sleeve.
- the invention also provides a method for establishing or re-establishing by continuity a structural continuity between two masonry or concrete construction elements separated by a surface of the joint, characterized in that at least one cylindrical cavity is formed overlapping the joint and having its axis approximately in the plane of the joint, a keying device is introduced into this cavity in accordance with what has been said above, and the frustoconical bodies are brought together until the desired tightening of the sleeve in the cavity.
- Figure 1 shows a longitudinal sectional view of the expandable device according to the pre- invention
- Figures 2 and 3 show cross-sectional views of this device, views which are taken respectively along the planes II-II and III-III of Figure 1;
- FIG. 4 illustrates an example of application of the device to wedging or keying a joint between two parts of a construction.
- the expandable device according to the invention consists, essentially, of a sleeve 1 which has a symmetry of revolution around its longitudinal axis XX and in which penetrate by its two ends two
- the interior of the sleeve 1 comprises two frustoconical parts 4 and 5 which match the shape of the bodies 2 and 3, respectively, and which are connected by a central cylindrical part 6.
- the sleeve 1 presents longitudinal slots which pass through it radially, which are regularly spaced around its periphery and extend for one, 7, from one of its front planes d 'end 8 to the vicinity of its other frontal end plane 9 ' but without reaching this latter, and for the others, 10, from this second front plane 9 to the vicinity (transverse plane 11) of first end frontal plane 8.
- the frustoconical body 2 is integral with a longitudinal threaded rod 12 which extends di-. rection of the other frustoconical body 3 and which passes through the latter with free sliding, which means that this body 3 has an axial passage 13 of diameter slightly greater than that of the threaded rod 12.
- a nut 14 is screwed onto the end of the threaded rod 12, while pressure washers 15, which may be of the type called “Belleville washers", passed over the threaded rod 12 in question between the nut 14 and the frustoconical body 3.
- the device according to the invention comprises four slots 7 regularly spaced on the periphery of the sleeve 1 and four slots 10 regularly alternated with respect to the slots 7 "However, it is quite clear that a number of different slots could be used.
- the truncated cores 2 and 3 may be advantageous to produce the truncated cores 2 and 3 of metal harder than the metal constituting the sleeve 1 and its frustoconical bearing surfaces 4 and 5.
- the bearing surfaces of the sleeve can deform locally to s '' adapt to internal cones 2 and 3 and match them perfectly.
- the opposite could be done by making the sleeve made of metal harder than the cones.
- Figure 4 is a view similar to the figure of the same number of patent application 85.0 * 1347 filed by the applicant on January 31, 1985. It shows in horizontal projection the trace jj of the vertical plane of the existing joint between two elements of concrete or masonry 20-21 which must be supported one on the other in this plane, for example under the effect of prestressing reinforcements com ⁇ priming these elements against the joint. Cylindrical cavities 22 with a vertical axis have been formed along the joint from the underside of the elements, so that they do not open onto the upper face. By means of jacks placed in these cavities we have generated efforts tending to move the elements 20 and 21 away from each other so as to open the seal jj.
- cavities 23 of cylindrical shape were practiced along the joint and parallel to its plane, starting as above from the underside of the elements 20 and 21, so that the cavities do not not lead to the upper face.
- the diameter of these cavities 23 is equal, with the desired play, to the diameter, before expansion, of the expandable bodies described with reference to FIGS. 1 to 3.
- These expandable bodies are placed in the cavities 23 and then expanded by the play of their nut in thus coming to be clamped against the wall of the cavities 23, that is to say against the joint faces of the elements 20 and 21. It is then possible to release the pressure of the jacks of the cavities 22 and dismount these jacks, at unless you prefer to leave them in place for later operation.
- the cavities may open at their upper part.
- the use of jacks to make bail ⁇ ler the joint is not always necessary, the devices according to the invention being put in place as soon as the cavities are pierced and then ensuring by wedging expansion sought.
- the invention is not limited to vertical joints but can be used whatever the geometry and dimensions of the joint.
- steel grades are given by way of example and can be replaced by other grades, in particular for the execution of devices having different shapes or dimensions, the adaptation to each case is within the reach of those skilled in the art.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Joining Of Building Structures In Genera (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8509703A FR2584119B1 (fr) | 1985-06-26 | 1985-06-26 | Dispositif expansible, applicable en particulier au clavage dans les constructions et les ouvrages de genie civil |
FR8509703 | 1985-06-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0227727A1 true EP0227727A1 (fr) | 1987-07-08 |
Family
ID=9320678
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19860903445 Withdrawn EP0227727A1 (fr) | 1985-06-26 | 1986-06-25 | Dispositif expansible, applicable en particulier au clavage dans les constructions et les ouvrages de genie civil |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0227727A1 (fr) |
FR (1) | FR2584119B1 (fr) |
WO (1) | WO1987000227A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5458448A (en) * | 1994-05-20 | 1995-10-17 | Cheng; Yu-Hsin | Expansion bolt structure |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1073365A (fr) * | 1952-09-09 | 1954-09-24 | Preload Co | Procédé de précontrainte d'ouvrages et d'él'ements en béton et ouvrages et éléments construits selon ce procédé |
FR1181104A (fr) * | 1957-08-12 | 1959-06-11 | Dispositif d'ossature métallique applicable à la réalisation d'une chaise, d'un fauteuil léger ou d'un fauteuil de repos | |
FR1182104A (fr) * | 1957-09-06 | 1959-06-23 | Perfectionnements apportés au montage d'un axe de liaison mécanique entre une partie menante et une partie menée en rotation | |
US3378285A (en) * | 1966-03-14 | 1968-04-16 | William C. Staley | Keying device |
DE2106968A1 (de) * | 1971-02-13 | 1972-08-17 | Kuske A | Vorrichtung zur Verbindung von Welle und Nabe |
US4152028A (en) * | 1978-02-24 | 1979-05-01 | The United States Of America As Represented By The United States Department Of Energy | Expansible apparatus for removing the surface layer from a concrete object |
-
1985
- 1985-06-26 FR FR8509703A patent/FR2584119B1/fr not_active Expired
-
1986
- 1986-06-25 WO PCT/FR1986/000223 patent/WO1987000227A1/fr not_active Application Discontinuation
- 1986-06-25 EP EP19860903445 patent/EP0227727A1/fr not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO8700227A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2584119B1 (fr) | 1988-07-08 |
WO1987000227A1 (fr) | 1987-01-15 |
FR2584119A1 (fr) | 1987-01-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19870218 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE FR GB IT LI LU NL SE |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: CAMPENON, BERNARD |
|
17Q | First examination report despatched |
Effective date: 19880819 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19890525 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: LEVESQUE, MICHEL Inventor name: GUICHARD, MICHEL |