CN212948356U - Concrete box girder core anti-floating device - Google Patents
Concrete box girder core anti-floating device Download PDFInfo
- Publication number
- CN212948356U CN212948356U CN202020836541.9U CN202020836541U CN212948356U CN 212948356 U CN212948356 U CN 212948356U CN 202020836541 U CN202020836541 U CN 202020836541U CN 212948356 U CN212948356 U CN 212948356U
- Authority
- CN
- China
- Prior art keywords
- box girder
- screw rod
- core mold
- concrete box
- pedestal
- 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.)
- Expired - Fee Related
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 59
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000003825 pressing Methods 0.000 claims abstract description 12
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- 238000009417 prefabrication Methods 0.000 claims abstract 4
- 238000000034 method Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011513 prestressed concrete Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
Images
Landscapes
- Moulds, Cores, Or Mandrels (AREA)
Abstract
The utility model discloses an anti device that floats of concrete box girder mandrel is applied to in the prefabrication device of concrete box girder, prefabrication device include the pedestal, set up in the external mold and the mandrel of pedestal top, its characterized in that: a plurality of preformed holes are uniformly formed in the pedestal along the length direction; a screw rod is arranged between the preformed hole and the core mold in a penetrating mode, and a sleeve is sleeved in the middle of the screw rod; a pressing plate is sleeved at the upper end of the screw rod and is positioned on the inner side of the core mold; a supporting plate is sleeved at the lower end of the screw rod and is positioned in the reserved hole; nuts are arranged at two ends of the screw rod. The core mould anti-floating device of the concrete box girder core mould can firmly fix the core mould above the pedestal, overcomes huge buoyancy generated during concrete pouring and concrete vibration, solves the problem of core mould fixing during concrete pouring, and ensures that the concrete thickness of the bottom and the web plate of the box girder reaches the design requirement.
Description
Technical Field
The utility model relates to a precast equipment technical field of concrete case roof beam, it is concrete, relate to an anti device that floats of concrete case roof beam mandrel.
Background
In the process of road construction, large and medium bridges mostly adopt post-tensioned prestressed concrete box girders. The core mould of the prestressed concrete box girder needs to be fixed in the prefabricating process, so that the core mould is prevented from floating upwards when concrete is poured, and the structural dimension of the box girder is ensured to meet the design requirement.
In the prior art, a pressing bar is generally adopted to prevent a core mold from floating upwards, the construction speed of the method is low, the pressing bar needs to be machined again when the size of a box girder is changed, the pressing bar needs to be selected according to box girders with different sizes, the supporting and the dismounting are complicated, and holes are left on supporting legs when the pressing bar is dismounted after concrete pouring is finished and initial setting is finished, so that the compactness of concrete on a top plate of the box girder is influenced; improper connection treatment of the pressing bar and the external mold easily causes upward floating of the internal mold and insufficient thickness of the top plate.
In addition, anchor rods are embedded in the prefabricated pedestal, a pull rod is arranged between the core mold and the embedded anchor rods to prevent the core mold from floating upwards, but threads on the embedded anchor rods are abraded after the embedded anchor rods are used for multiple times, so that the safety accident of mold collapse is easy to happen when concrete is poured, and potential safety hazards are brought to constructors. And after the concrete is initially set, the pull rod is difficult to take out of the box girder, so that the pull rod cannot be repeatedly used, and the manufacturing cost of the box girder is increased invisibly.
SUMMERY OF THE UTILITY MODEL
The utility model provides a concrete box girder mandrel anti-floating device to prevent the mandrel come-up when concrete placement, vibration.
In order to achieve the purpose, the utility model provides a concrete box girder core mold anti-floating device which is applied to a prefabricating device of a concrete box girder, wherein the prefabricating device comprises a pedestal, an outer mold and a core mold which are arranged above the pedestal, and a plurality of preformed holes are uniformly arranged on the pedestal along the length direction; a screw rod is arranged between the preformed hole and the core mold in a penetrating mode, and a sleeve is sleeved in the middle of the screw rod; a pressing plate is sleeved at the upper end of the screw rod and is positioned on the inner side of the core mold; a supporting plate is sleeved at the lower end of the screw rod and is positioned in the reserved hole; nuts are arranged at two ends of the screw rod.
Further, it is preferable that the length of the sleeve is equal to the length of the distance between the outer mold bottom inner wall and the core mold bottom outer wall.
Further, it is preferable that the length of the sleeve is greater than the distance between the outer mold bottom inner wall and the outer core bottom wall, and the length of the sleeve is not greater than the distance between the preformed hole top wall and the inner core bottom wall.
Further, preferably, the inner diameter of the sleeve exceeds the screw diameter by 5mm to 20 mm.
Further, it is preferable that the diameter of the screw is in the range of 20mm to 30 mm.
Further, it is preferable that the sectional shape of the prepared hole is a rectangular shape which penetrates the pedestal in the lateral direction.
Further, it is preferable that the width and height of the prepared hole is 30cm × 20 cm.
According to the above description and practice, a concrete box girder mandrel anti-floating device through wear to establish the screw rod between mandrel and external mold to do not set up clamp plate and layer board respectively at the both ends of screw rod, set up the nut again at both ends, adjust the distance of clamp plate and layer board through the nut, and then adjust the distance between mandrel and the external mold. When the core mold and the outer mold are positioned and concrete pouring and vibrating operation is started, the pressing plate and the supporting plate can resist buoyancy force borne by the core mold, the core mold is firmly fixed at a specified position above the outer mold, and the thickness of a bottom plate of the concrete box girder is guaranteed. In addition, the concrete box girder core mold anti-floating device can be detached after the concrete box girder is manufactured, can be repeatedly used, and reduces the manufacturing cost to a certain extent.
Drawings
Fig. 1 is a schematic view of a state of use of the concrete box girder core anti-floating device according to the first embodiment of the present invention.
Fig. 2 is an enlarged view of a portion a in fig. 1.
Fig. 3 is a schematic side view of the pedestal according to the present invention.
Fig. 4 is a schematic view showing a state of use of the concrete box girder core mold anti-floating device according to the second embodiment of the present invention.
Fig. 5 is an enlarged view of a portion B in fig. 4.
In the figure:
1. a pedestal 11 and a preformed hole; 2. an outer mold; 3. a core mold; 4. a screw; 5. a sleeve; 6. pressing a plate; 7. a support plate; 8. and a nut.
Detailed Description
Exemplary embodiments will now be described more fully with reference to the accompanying drawings. The exemplary embodiments, however, may be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted. In the present disclosure, the terms "include", "arrange", "disposed" and "disposed" are used to mean open-ended inclusion, and mean that there may be additional elements/components/etc. in addition to the listed elements/components/etc.; the terms "first," "second," and the like are used merely as labels, and are not limiting as to the number or order of their objects; the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
In an exemplary embodiment of the present disclosure, there is provided a concrete box girder core mold anti-floating device. Fig. 1 is a schematic view of a state of use of the concrete box girder core anti-floating device according to the first embodiment of the present invention. Fig. 2 is an enlarged view of a portion a in fig. 1. Fig. 3 is a schematic side view of the pedestal according to the present invention.
Referring to fig. 1 to 3, the concrete box girder core mold anti-floating device in the embodiment is applied to a prefabricating device of a concrete box girder. Which comprises a pedestal 1, an outer mold 2 and a core mold 3 disposed above the pedestal 1. When a concrete box girder is prefabricated, concrete needs to be poured between the core mold 3 and the outer mold 2, and in order to prevent the core mold 3 from floating up in the concrete, an anti-floating device is added between the outer mold 2 and the core mold 3. As shown in fig. 3, the pedestal 1 is a strip-shaped structure, a plurality of prepared holes 11 are uniformly arranged on the pedestal 1 along the length direction, and the prepared holes 11 transversely penetrate through the pedestal 1, so that the anti-floating device is convenient to install. The section of the preformed hole 11 is preferably a rectangular structure with the width and height of 30cm × 20 cm.
As shown in fig. 2, the anti-floating device includes: screw 4, sleeve 5, pressure plate 6, supporting plate 7 and nut 8.
Referring to fig. 1 and 2, the screw rod 4 is inserted between the preformed hole 11 and the core mold 3, and has a lower end located in the preformed hole 11 and an upper end located in the cavity inside the core mold 3. The diameter of the screw 4 is preferably 20mm to 30 mm.
A sleeve 5 is sleeved in the middle of the screw rod 4, and the sleeve 5 is positioned between the core mold 3 and the outer mold 2. In this embodiment, the length of the sleeve 5 is equal to the length of the distance between the inner wall of the bottom of the outer die 2 and the outer wall of the bottom of the core die 3. Needless to say, the inner diameter of the sleeve 5 is larger than the diameter of the screw 4, and preferably, the inner diameter of the sleeve 5 exceeds the diameter of the screw 4 by 5mm to 20 mm. In the process of supporting the outer die 2 and the core die 3, the sleeve 5 can prevent the core die 3 from falling down, and the thickness of the bottom plate of the concrete box girder is ensured.
At the upper end of the screw 4, a press plate 6 is fitted, the press plate 6 may be circular or rectangular, and the press plate 6 is located in the inner cavity of the core mold 3. A nut 8 is also arranged on one side of the pressure plate 6 close to the upper end of the screw rod 4. The nut 8 is screwed to the screw 4, and the position of the pressure plate 6 on the screw 4 can be adjusted by rotating the nut 8.
At the lower end of the screw rod 4, a supporting plate 7 is sleeved, the supporting plate 7 can be circular or rectangular, and the supporting plate 7 is positioned in the prepared hole 11. A nut 8 is also arranged on one side of the supporting plate 7 close to the lower end of the screw rod 4. The nut 8 is in threaded connection with the screw 4, and the position of the supporting plate 7 on the screw 4 can be adjusted by rotating the nut 8.
When in use, round holes for penetrating the screw rods 4 are drilled on the pedestal 1, the outer die 2 and the core die 3; then the sleeve 5 is placed between the outer mold 2 and the core mold 3; then, a screw 4 sequentially passes through the pedestal 1, the outer die 2, the sleeve 5 and the core die 3; then, a pressing plate 6 is sleeved at the upper end of the screw rod 4 and fixed by a nut, so that the screw rod 4 is prevented from falling off from the upper end; then, the lower end part of the screw rod 4 is sleeved with the supporting plate 7 and is fixed by a nut, so that the supporting plate is prevented from falling off from the lower end of the screw rod 4; finally, the nuts at the upper end and the lower end are rotated to enable the distance between the inner wall of the bottom of the outer die 2 and the outer wall of the bottom of the core die 3 to reach the designed length, namely the thickness of the lower bottom plate of the concrete box girder; then concrete pouring and vibrating operation can be carried out; after the concrete reaches the designed strength, the nut can be screwed off, the anti-floating device is disassembled, the sleeve 5 can be kept in the concrete box girder, and the rest parts can be repeatedly utilized.
Example two
In an exemplary embodiment of the present disclosure, there is provided a concrete box girder core mold anti-floating device. Fig. 3 is a schematic side view of the pedestal according to the present invention. Fig. 4 is a schematic view showing a state of use of the concrete box girder core mold anti-floating device according to the second embodiment of the present invention. Fig. 5 is an enlarged view of a portion B in fig. 4.
Referring to fig. 3 to 5, the concrete box girder core mold anti-floating device in this embodiment is applied to a prefabricating device of a concrete box girder. Which comprises a pedestal 1, an outer mold 2 and a core mold 3 disposed above the pedestal 1. When a concrete box girder is prefabricated, concrete needs to be poured between the core mold 3 and the outer mold 2, and in order to prevent the core mold 3 from floating up in the concrete, an anti-floating device is added between the outer mold 2 and the core mold 3. As shown in fig. 3, the pedestal 1 is a strip-shaped structure, a plurality of prepared holes 11 are uniformly arranged on the pedestal 1 along the length direction, and the prepared holes 11 transversely penetrate through the pedestal 1, so that the anti-floating device is convenient to install. The section of the preformed hole 11 is preferably a rectangular structure with the width and height of 30cm × 20 cm.
As shown in fig. 2, the anti-floating device includes: screw 4, sleeve 5, pressure plate 6, supporting plate 7 and nut 8.
Referring to fig. 4 and 5, the screw rod 4 is inserted between the preformed hole 11 and the core mold 3, and has a lower end located in the preformed hole 11 and an upper end located in the cavity inside the core mold 3. The diameter of the screw 4 is preferably 20mm to 30 mm.
A sleeve 5 is fitted around the middle of the screw 4, and the sleeve 5 is positioned between the core mold 3 and the pedestal 1. In this embodiment, the length of the sleeve 5 is equal to the length of the distance between the inner wall of the bottom of the core mold 3 and the top wall of the prepared hole 11. The length of the sleeve 5 can be reduced, but it is ensured that the length of the sleeve 5 is greater than the distance between the inner wall of the bottom of the outer die 2 and the outer wall of the bottom of the core die 3. Needless to say, the inner diameter of the sleeve 5 is larger than the diameter of the screw 4, and preferably, the inner diameter of the sleeve 5 exceeds the diameter of the screw 4 by 5mm to 20 mm. In addition, the surface of the sleeve 5 should be smoothly curved.
At the upper end of the screw 4, a press plate 6 is fitted, the press plate 6 may be circular or rectangular, and the press plate 6 is located in the inner cavity of the core mold 3. A nut 8 is also arranged on one side of the pressure plate 6 close to the upper end of the screw rod 4. The nut 8 is screwed to the screw 4, and the position of the pressure plate 6 on the screw 4 can be adjusted by rotating the nut 8.
At the lower end of the screw rod 4, a supporting plate 7 is sleeved, the supporting plate 7 can be circular or rectangular, and the supporting plate 7 is positioned in the prepared hole 11. A nut 8 is also arranged on one side of the supporting plate 7 close to the lower end of the screw rod 4. The nut 8 is in threaded connection with the screw 4, and the position of the supporting plate 7 on the screw 4 can be adjusted by rotating the nut 8.
When in use, round holes for penetrating the screw rod 4 and the sleeve 5 are drilled on the pedestal 1, the outer die 2 and the core die 3; then brushing oil on the surface of the sleeve 5 and sequentially passing through the core mold 3, the outer mold 2 and the pedestal 1; then the screw 4 is inserted into the sleeve 5; then, a pressing plate 6 is sleeved at the upper end of the screw rod 4 and fixed by a nut, so that the screw rod 4 is prevented from falling off from the upper end; then, the lower end part of the screw rod 4 is sleeved with the supporting plate 7 and is fixed by a nut, so that the supporting plate is prevented from falling off from the lower end of the screw rod 4; finally, the nuts at the upper end and the lower end are rotated to enable the distance between the inner wall of the bottom of the outer die 2 and the outer wall of the bottom of the core die 3 to reach the designed length, namely the thickness of the lower bottom plate of the concrete box girder; then concrete pouring and vibrating operation can be carried out; after the concrete reaches the designed strength, the nut can be screwed off, the anti-floating device is detached, and the sleeve 5 can be easily detached from the bottom plate of the concrete box girder due to the fact that the surface of the sleeve is brushed with oil in advance, so that the anti-floating device can be used for multiple times.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (7)
1. The utility model provides a concrete box girder mandrel anti-floating device, is applied to in the prefabrication device of concrete box girder, the prefabrication device include the pedestal, set up in the external mold and the mandrel of pedestal top, its characterized in that:
a plurality of preformed holes are uniformly formed in the pedestal along the length direction;
a screw rod is arranged between the preformed hole and the core mold in a penetrating mode, and a sleeve is sleeved in the middle of the screw rod; a pressing plate is sleeved at the upper end of the screw rod and is positioned on the inner side of the core mold; a supporting plate is sleeved at the lower end of the screw rod and is positioned in the reserved hole;
nuts are arranged at two ends of the screw rod.
2. The concrete box girder core mold anti-floating device according to claim 1, wherein the length of the sleeve is equal to the length of the distance between the inner wall of the outer mold bottom and the outer wall of the core mold bottom.
3. The concrete box girder core mold anti-floating device according to claim 1, wherein the length of the sleeve is greater than the distance between the outer mold bottom inner wall and the core mold bottom outer wall, and the length of the sleeve is not greater than the distance between the top wall of the prepared hole and the core mold bottom inner wall.
4. The concrete box girder core mold anti-floating device according to any one of claims 1 to 3, wherein the inner diameter of the sleeve exceeds the screw diameter by 5mm to 20 mm.
5. The concrete box girder core mold anti-floating device according to any one of claims 1 to 3, wherein the diameter of the screw is in the range of 20mm to 30 mm.
6. The concrete box girder core mold anti-floating device according to any one of claims 1 to 3, wherein the section of the prepared hole is rectangular, which penetrates the pedestal in a lateral direction.
7. The concrete box girder core mold anti-floating device according to claim 6, wherein the width and height of the prepared hole is 30cm x 20 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020836541.9U CN212948356U (en) | 2020-05-19 | 2020-05-19 | Concrete box girder core anti-floating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020836541.9U CN212948356U (en) | 2020-05-19 | 2020-05-19 | Concrete box girder core anti-floating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212948356U true CN212948356U (en) | 2021-04-13 |
Family
ID=75375370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020836541.9U Expired - Fee Related CN212948356U (en) | 2020-05-19 | 2020-05-19 | Concrete box girder core anti-floating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212948356U (en) |
-
2020
- 2020-05-19 CN CN202020836541.9U patent/CN212948356U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112832388A (en) | Connecting joint of prefabricated reinforced concrete column and construction method | |
| CN109339320B (en) | Rear precast concrete movable core rib and preparation method thereof | |
| CN112854441A (en) | Assembly type concrete self-resetting beam column rotating node connecting structure and assembling method | |
| CN109208823B (en) | Quick-assembly built-in steel box type concrete filled steel tube column and production process thereof | |
| CN112031237A (en) | Cast-in-place concrete hollow floor slab embedded type core mold anti-floating fixing device | |
| CN212948356U (en) | Concrete box girder core anti-floating device | |
| CN217098282U (en) | Structure for preventing inner die of prefabricated box girder from floating upwards | |
| CN2349297Y (en) | Length-adjustable prefabricated shearing force beam form | |
| CN110924426A (en) | Bottom-expanding cup-mouth type connecting structure and method for reinforced concrete column and foundation | |
| CN215107978U (en) | Fully prefabricated wall or retaining wall | |
| CN113494125B (en) | Prefabricated round hole plate wall shock insulation structure with through-type joint bars and mounting method thereof | |
| CN109667337B (en) | Prefabricated concrete structure for assembled building and construction method thereof | |
| KR100508532B1 (en) | Structure of Bridge with Hollow Slab and Constructing Method Thereof | |
| CN217434608U (en) | Prefabricated case roof beam centre form fixing device | |
| JP2006257851A (en) | Unit with embedding members, hollow slab using it, and its construction method | |
| CN215258827U (en) | Embedded electronic box fixed stay frame of repeatedly usable | |
| CN214419109U (en) | Pre-tensioning method T-shaped beam tensioning pedestal | |
| CN220889464U (en) | Template positioning device of frame column and frame column template structure | |
| CN116497980B (en) | Edge member, prefabricated pull-tab type connecting piece anti-seismic superposed wall and construction method | |
| CN215926435U (en) | Anti reinforcing apparatus that floats of hollow superstructure mandrel of cast in situ concrete | |
| CN220117270U (en) | Deep hole foundation bolt sleeve for large equipment foundation | |
| CN213952987U (en) | Anti-floating device for foam box of hollow floor | |
| CN220686460U (en) | Prefabricated laminated slab with reserved hole | |
| CN220768151U (en) | Contact net pillar cup-shaped foundation pouring die | |
| CN219491264U (en) | Connecting structure of floating window top plate and H-shaped steel beam |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230410 Address after: 100085 Beijing Daxing District Beijing economic and Technological Development Zone, Kangding street 1, 2, six or seven stories. Patentee after: MCC COMMUNICATION CONSTRUCTION GROUP Co.,Ltd. Address before: 065201 3rd floor, building 5, Zhongxing science and Technology Park, west side of Yanling road and north side of high voltage corridor, Yanjiao Development Zone, Sanhe City, Langfang City, Hebei Province Patentee before: MCC Rail Transit Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210413 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |