CN210732811U - Pedestal bottom die structure for pouring prestressed beam - Google Patents
Pedestal bottom die structure for pouring prestressed beam Download PDFInfo
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- CN210732811U CN210732811U CN201920944587.XU CN201920944587U CN210732811U CN 210732811 U CN210732811 U CN 210732811U CN 201920944587 U CN201920944587 U CN 201920944587U CN 210732811 U CN210732811 U CN 210732811U
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- pedestal
- template
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- bottom die
- prestressed
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Abstract
The utility model relates to a roof beam body pouring structure technical field specifically indicates a pedestal die block structure for pouring prestressed beam. Including the pedestal basis and fix the pedestal on the pedestal basis, its characterized in that: the bottom die is used for pouring the bottom of the prestressed beam; the bottom die comprises end templates positioned at two ends of the pedestal, a middle template positioned in the middle of the pedestal and a transition template detachably connected between the end templates and the middle template; the end template is a plate-shaped structure which can be connected to the pedestal in a sliding manner along the tensioning direction of the prestressed beam; the intermediate template is fixed on the pedestal. The utility model discloses a slidingtype structure between end template and the pedestal is effectual has improved the concrete structure outward appearance and the quality problems of precast beam end, has improved structural security nature and aesthetic property greatly, and simultaneously, repeatedly usable after the slidingtype structure is demolishd has energy-conserving, environmental protection, economic characteristics.
Description
Technical Field
The utility model relates to a roof beam body pouring structure technical field specifically indicates a pedestal die block structure for pouring prestressed beam.
Background
In bridge construction, the upper structure is widely applied by adopting a prefabricated combined structure, and a concrete wedge block protruding out of the beam bottom is always arranged at the position of a support at the end part of a prefabricated beam and used for adjusting the transverse and longitudinal slopes of the beam body and supporting the beam body on the support. When the precast beam is tensioned on the pedestal, under the action of applied prestress, the beam body shrinks to generate the tendency of midspan displacement, so that horizontal friction force is generated between the end part of the precast beam and the pedestal, if the pedestal is fixed, the end part of the precast beam inevitably generates displacement in the midspan direction, and the concrete at the junction position of the beam bottom end part, the wedge-shaped block and the beam body generates tensile stress, so that the cracking phenomenon easily occurs.
Disclosure of Invention
The utility model aims at solving the above-mentioned background art not enough, provide a pedestal die block structure for pouring prestressed beam.
The technical scheme of the utility model is that: the utility model provides a pedestal die block structure for pouring prestressed beam, includes the pedestal basis and fixes the pedestal on the pedestal basis, its characterized in that: the bottom die is used for pouring the bottom of the prestressed beam; the bottom die comprises end templates positioned at two ends of the pedestal, a middle template positioned in the middle of the pedestal and a transition template detachably connected between the end templates and the middle template; the end template is a plate-shaped structure which can be connected to the pedestal in a sliding manner along the tensioning direction of the prestressed beam; the intermediate template is fixed on the pedestal.
And the end template is further provided with a leveling structure which is adapted to the change of the end part of the prestressed beam when the end part of the prestressed beam contracts towards the middle template.
A groove is further formed in the end head template; the leveling structure comprises a leveling box arranged in the groove; the leveling box is of a plate-shaped structure with a smooth upper surface, and the lower end of the leveling box is connected into the groove in an up-and-down lifting mode through bolts penetrating through the end template and the leveling box.
The transition template is of a plate-shaped structure with a small upper part and a large lower part, and the end surfaces of the two ends of the transition template, which are contacted with the end template and the middle template, are inclined end surfaces.
The pedestal further comprises a plurality of I-shaped steel arranged at intervals along the length direction of the pedestal foundation; the end template is placed on the I-steel, and the I-steel below the end template is coated with butter.
And further, the side part of the I-shaped steel below the end template is fixed on the pedestal foundation through a stiffening plate.
The utility model has the advantages that: 1. the end template is arranged into a slidable structure, so that the shrinkage of the prestressed beam after being tensioned can be adapted, the prestressed beam can be effectively prevented from cracking, and the safety of the beam body structure is improved;
2. by arranging the sliding type end template structure, a side mold opposite-pulling system can be arranged below the end template, so that the template is favorably restrained, the end template is prevented from expanding, and the structural size of the beam body is ensured;
3. because the end template and the beam body move together, the phenomenon that the bottom die is damaged due to the extrusion effect of the beam body on the bottom die during tensioning is avoided.
The utility model discloses a slidingtype structure between end template and the pedestal is effectual has improved the concrete structure outward appearance and the quality problems of precast beam end, has improved structural security nature and aesthetic property greatly, and simultaneously, repeatedly usable after the slidingtype structure is demolishd has energy-conserving, environmental protection, economic characteristics.
Drawings
FIG. 1: the structure of the pedestal ground anchor of the utility model is shown schematically (the transition template is not detached);
FIG. 2: the structure of the pedestal ground anchor of the utility model is shown schematically (the transition template is disassembled);
wherein: 1-pedestal foundation; 2, end template; 3-intermediate template; 4-transition template; 5, forming a groove; 6, leveling box; 7, a bolt; 8-I-steel; 9-a stiffening plate.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and specific embodiments.
Referring to fig. 1-2, a pedestal bottom die structure for pouring prestressed beams includes a pedestal foundation 1 and a pedestal fixed on the pedestal foundation 1, the pedestal foundation 1 of the embodiment is a reinforced concrete structure, the pedestal includes a plurality of i-beams 8 arranged along the length direction of the pedestal foundation 1 at intervals, the i-beams 8 are fixed on the pedestal foundation 1, and the i-beams 8 are arranged along the width direction of the pedestal foundation 1.
The bottom die for pouring the prestressed beam is fixed on the pedestal, as shown in fig. 1-2, the bottom die of the embodiment includes end templates 2 at two ends of the pedestal, a middle template 3 in the middle of the pedestal, and a transition template 4 detachably connected between the end templates 2 and the middle template 3, the end templates 2 are plate-shaped structures which can be slidably connected to the pedestal along the tensioning direction of the prestressed beam, the end templates 2 are placed on i-shaped steel 8, and the i-shaped steel 8 below the end templates 2 is coated with grease to enhance the lubricating effect and reduce the friction force. In addition, the side part of the I-shaped steel 8 below the end template 2 is fixed on the pedestal foundation 1 through a stiffening plate 9.
In order to accommodate the shrinkage of the end portion of the prestressed girder toward the intermediate form 3 during actual construction, the end form 2 of the present embodiment is provided with a leveling structure that accommodates the change of the end portion of the prestressed girder when the end portion of the prestressed girder shrinks toward the intermediate form 3. As shown in fig. 1-2, a groove 5 is formed in the end template 2, the leveling structure includes a leveling box 6 disposed in the groove 5, the leveling box 6 is a plate-shaped structure with a flat upper surface, and the lower end of the leveling box 6 is connected to the groove 5 through a bolt 7 penetrating through the end template 2 and the leveling box 6 in an up-and-down lifting manner.
The middle template 3 of this embodiment is fixed with on the pedestal, and in order to adapt to the shrink of prestressed beam and the sliding of end template 2, this embodiment is provided with detachable transition template 4 between end template 2 and middle template 3, is provided with the steel pipe on the pedestal basis 1 of the below of transition template 4, wears to be equipped with the screw rod in the steel pipe, the screw rod with fix the fixation nut screwed connection of steel pipe upper end, still the cover is equipped with movable nut on the screw rod, the upper end of screw rod is connected in the bottom of transition template 4. The transition template 4 can be installed or removed by rotating the movable nut and the screw rod.
As shown in fig. 1, the transition formwork 4 has a plate-shaped structure with a small top and a large bottom, and the end surfaces of both ends of the transition formwork 4, which are in contact with the end formworks 2 and the middle formwork 3, are inclined end surfaces. Such an arrangement facilitates the removal of the transition formwork 4 from top to bottom.
During actual construction, when the prefabricated pedestal foundation 1 is poured, the two stiffening plates 9 are pre-embedded on the surface of the pedestal foundation 1, the I-shaped steel 8 and the stiffening plates 9 are welded and fixed, then longitudinal square steel and triangular plate rib plates are welded between the two I-shaped steel 8 at the end of the pedestal, and concrete is poured to connect the square steel and the triangular plate rib plates into a whole, so that the horizontal stability of the machined section steel 8 is improved. And (4) polishing the top surface of the I-shaped steel 8 smoothly and brushing grease for lubrication. And after the steel plate at the bottom of the end template 2 is polished to be smooth, the steel plate is directly placed on the I-shaped steel 8 without welding. And (3) welding and fixing the intermediate template 3 on other I-shaped steel 8, and adjusting the height of the transition template 4 to enable the transition template 4 to be flush with the intermediate template 3 and the end template 2, so as to finish bottom die installation of the prefabricated pedestal.
Before the precast beam is tensioned, the transition template 4 is firstly removed downwards, when the precast beam is tensioned, the beam is arched upwards under the action of prestress, the beam end concrete and the end template 2 synchronously slide towards the middle of the beam span, and the concrete cracking phenomenon caused by relative movement between the concrete and the bottom die is avoided.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The utility model provides a pedestal die block structure for pouring prestressed beam, includes pedestal foundation (1) and fixes the pedestal on pedestal foundation (1), its characterized in that: the bottom die is used for pouring the bottom of the prestressed beam; the bottom die comprises end templates (2) positioned at two ends of the pedestal, a middle template (3) positioned in the middle of the pedestal and a transition template (4) detachably connected between the end templates (2) and the middle template (3); the end template (2) is a plate-shaped structure which can be connected to the pedestal in a sliding manner along the tensioning direction of the prestressed beam; the middle template (3) is fixed on the pedestal.
2. The bottom die structure of the pedestal for pouring the prestressed girder according to claim 1, wherein: and the end template (2) is provided with a leveling structure which adapts to the change of the end part of the prestressed beam when the end part of the prestressed beam contracts towards the middle template (3).
3. The bottom die structure of the pedestal for pouring the prestressed girder according to claim 2, wherein: a groove (5) is formed in the end head template (2); the leveling structure comprises a leveling box (6) arranged in the groove (5); the leveling box (6) is of a plate-shaped structure with a smooth upper surface, and the lower end of the leveling box (6) is connected into the groove (5) in a way of ascending and descending through bolts (7) penetrating through the end template (2) and the leveling box (6).
4. The bottom die structure of the pedestal for pouring the prestressed girder according to claim 1, wherein: the transition template (4) is of a plate-shaped structure with a small upper part and a large lower part, and the end surfaces of the two ends of the transition template (4) which are contacted with the end template (2) and the middle template (3) are inclined end surfaces.
5. The bottom die structure of the pedestal for pouring the prestressed girder according to claim 1, wherein: the pedestal comprises a plurality of I-shaped steel (8) which are arranged at intervals along the length direction of a pedestal base (1); the end template (2) is placed on the I-steel (8), and the I-steel (8) below the end template (2) is coated with butter.
6. The bottom die structure of the pedestal for pouring the prestressed girder according to claim 5, wherein: the side part of the I-shaped steel (8) below the end template (2) is fixed on the pedestal foundation (1) through a stiffening plate (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920944587.XU CN210732811U (en) | 2019-06-21 | 2019-06-21 | Pedestal bottom die structure for pouring prestressed beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920944587.XU CN210732811U (en) | 2019-06-21 | 2019-06-21 | Pedestal bottom die structure for pouring prestressed beam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210732811U true CN210732811U (en) | 2020-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920944587.XU Expired - Fee Related CN210732811U (en) | 2019-06-21 | 2019-06-21 | Pedestal bottom die structure for pouring prestressed beam |
Country Status (1)
| Country | Link |
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| CN (1) | CN210732811U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112497478A (en) * | 2020-10-16 | 2021-03-16 | 保利长大工程有限公司 | Pre-tensioning method precast beam plate releasing and sliding method |
| CN114351596A (en) * | 2021-12-31 | 2022-04-15 | 江西省交通工程集团有限公司 | Construction method for preventing end head of precast beam from being tensioned and cracked |
-
2019
- 2019-06-21 CN CN201920944587.XU patent/CN210732811U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112497478A (en) * | 2020-10-16 | 2021-03-16 | 保利长大工程有限公司 | Pre-tensioning method precast beam plate releasing and sliding method |
| CN114351596A (en) * | 2021-12-31 | 2022-04-15 | 江西省交通工程集团有限公司 | Construction method for preventing end head of precast beam from being tensioned and cracked |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200612 |