CN209737911U - Multi-height shared type box girder internal mold - Google Patents
Multi-height shared type box girder internal mold Download PDFInfo
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- CN209737911U CN209737911U CN201822257218.1U CN201822257218U CN209737911U CN 209737911 U CN209737911 U CN 209737911U CN 201822257218 U CN201822257218 U CN 201822257218U CN 209737911 U CN209737911 U CN 209737911U
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Abstract
The utility model discloses a many high sharing die box girder centre forms, including top mould and top mould braced system, go up movable mould, lower movable mould and receipts mould hydro-cylinder, go up the movable mould symmetry and articulate in the both sides of top mould, lower movable mould is articulated with the lower extreme of last movable mould, between top mould and the last movable mould, goes up and all installs the receipts mould hydro-cylinder between movable mould and the lower movable mould. The top die supporting system comprises a through long main beam, a jacking oil cylinder, a bracket cross beam and a middle supporting leg, wherein the top surface of the main beam is fixedly connected to the bottom surface of the top die; and the outer contour of the top die and the upper moving die after the inner die is contracted is smaller than the inner cavity outlet of the box girder with lower height. When box girders with different heights are prefabricated, the height difference is realized by changing the heights of the lower movable die and the middle supporting leg. The number of the template sections is small, and the assembly is quick; the main beam and the top die are welded into a whole, so that the flatness of the top die is ensured; when the inner cavity changes, namely the beam type is switched, only the lower movable die and the middle supporting leg need to be disassembled and assembled.
Description
Technical Field
The utility model relates to a concrete box girder centre form, especially a many high sharing type box girder centre forms.
Background
In the construction process of a high-speed railway, the situation that a newly-built line crosses an existing line is often existed and limited by the terrain, if a standard bridge is adopted, the clearance height of the existing line below is not enough, and in order to solve the problem, a small-span and low-height beam type is generated, the top structure of the beam type is completely the same as that of the standard beam, and only a bottom plate is lifted. Because the number of the low-height box girders is small, the construction generally requires that standard girder templates can be shared, so that the construction cost is saved, and great difficulty is increased for the design of the templates.
The published chinese utility model patent CN202016109U "oblique web box girder shared hydraulic internal mold with different heights" realizes the sharing of the two girder type templates, but still has the following disadvantages:
(1) It is easy to see from this patent attached drawing that the top die template bilateral symmetry divide into first movable mould, regulation template, second on movable mould and lower movable mould, and whole cross-section divides into 9 templates, and the template divides the piece many, assembles work load big, and the template roughness is more difficult to guarantee, influences the roof beam body shaping effect.
(2) The top die template is used as a reference for assembling the inner die templates, bears the weight of all the inner die templates, is supported only by a plurality of points of the adjusting columns or the guide pillars, is difficult to ensure the flatness of the template, is easy to cause the inclination of the template, is limited by a demolding space, has limited thickness, is weak in transverse and longitudinal rigidity, and is difficult to meet the use requirement, so that both sides and both ends of the inner die are seriously downwarped.
(3) Disclose in this patent every adjacent three be equipped with the enhancement longeron between the regulation post, the problem of warping down of beam-ends template has been solved to a certain extent to this mode, but has caused the difficulty of artifical dismouting on the other hand, and during the prefabricated low height box girder, this structure need be demolishd, can't play the effect of strengthening the longeron again.
(4) when needing to switch to the centre form of other heights, need demolish or install the regulation post, consequently need demolish all templates earlier, demolish or install the regulation post again, work load is big, assembles the cycle length, and the change is with high costs.
SUMMERY OF THE UTILITY MODEL
the utility model discloses a main aim at provides a template piecemeal is few, simple to operate, and centre form self rigidity is big, can effectively solve the template problem of warping down, and the convenient many high sharing type case roof beam centre forms are switched to the roof beam type.
The utility model provides a mould shell roof beam centre form is shared to many heights, including top mould and top mould braced system, upper movable mould, lower movable mould and receipts mould hydro-cylinder, upper movable mould symmetry articulates in the both sides of top mould, and lower movable mould articulates with the lower extreme of upper movable mould, between top mould and the upper movable mould, all install between upper movable mould and the lower movable mould and receive the mould hydro-cylinder, top mould braced system includes full length girder, jacking hydro-cylinder, bracket crossbeam and middle part landing leg, and the girder top surface concreties in top mould bottom surface, and jacking hydro-cylinder installs on the girder to support on the bracket crossbeam, and the middle part landing leg can be dismantled and connect in bracket crossbeam bottom; the outer contour of the top die and the upper moving die after the inner die is contracted is smaller than the outlet of the inner cavity of the box beam with lower height, and when box beams with different heights are prefabricated, the height difference is realized by changing the heights of the lower moving die and the middle supporting leg.
The lower moving die comprises a detachable straight-line segment and a detachable lower angle die segment, and after the lower moving die is connected with the upper moving die, the vertical height of the straight-line segment is equal to the height difference between box girders with different heights.
The straight line section and the lower angle mould section are connected through a fastener; the inner sides of the straight line section and the lower angle mould section are both connected with mould-closing oil cylinder hinged seats; when the beam type is switched, the connecting position of the mold closing oil cylinder on the lower movable mold is correspondingly changed.
The main beam is a box beam, the top surface of the main beam is welded with the bottom surface of the top die, and the two longitudinal sides of the main beam are provided with mounting seats used for connecting the jacking oil cylinders.
The bracket cross beam is provided with a counter roller for supporting the main beam.
And adjusting support rods for keeping the shape of the inner mold during beam body pouring are arranged between the main beam and the upper movable mold and between the main beam and the lower movable mold.
And an adjusting support rod capable of preventing the template from floating upwards is arranged between the bracket cross beam and the top die.
Compared with the prior art, the utility model discloses reduced the template merogenesis, the template piece reduces to reduced and assembled the degree of difficulty, simple to operate has improved and has assembled efficiency, makes the precast beam body more pleasing to the eye simultaneously. The through long main beam with high rigidity is arranged in the middle of the template, and the main beam and the top mold are fixedly connected into a whole, so that the problems of serious template downwarping and inclined template unbalance loading are effectively solved, and the flatness of the top mold is easier to ensure. When the box girder inner chamber changes and the roof beam type switches, the top mould and the last movable mould need not the dismouting, only need dismouting movable mould and middle part landing leg down, do not have extra fragmentary annex, and the scene of more being convenient for is assembled, and greatly reduced workman working strength improves work efficiency, more does benefit to the construction of box girder. The utility model discloses the single case list room case roof beam of specially adapted prefabricated inner chamber broad.
Drawings
Figure 1 is the utility model discloses an operating condition section sketch map for the prefabrication of standard height box girder.
FIG. 2 is a schematic sectional view of a mold-retracting state of a standard-height box girder when demolding is completed after prefabrication.
Fig. 3 is a partial side view of fig. 1.
Figure 4 is the utility model is used for be less than prefabricated operating condition section sketch map of standard height box girder.
Fig. 5 is a schematic sectional view of a box girder prefabricated below a standard height in a mold-retracting state.
Number in the figure:
1-top mould; 2, moving the mold upwards;
3, moving the mold downwards; 31-straight line segment; 32-lower angle mold section;
4-a mould-closing oil cylinder; 5, a main beam; 6-jacking oil cylinders; 7-a carrier beam;
8-middle support leg; 9-adjusting the stay bar; 10-counter roller;
JJEB-hinged ear plate.
Detailed Description
The utility model discloses a many high sharing type case roof beam centre forms can be used to the standard roof beam prefabrication, also can be used to be less than the low joists prefabrication of standard roof beam height.
Fig. 1 and 3 are schematic views of the working state of a standard beam during prefabrication. As can be seen from the figure, the box girder inner die comprises a top die 1, an upper movable die 2, a lower movable die 3, a die-retracting oil cylinder 4, a main beam 5, a jacking oil cylinder 6, a bracket cross beam 7, a middle supporting leg 8, an adjusting support rod 9 and a counter-roller 10.
The upper moving dies 2 are symmetrically hinged to two sides of the top die 1, and the lower moving dies 3 are hinged to the lower ends of the upper moving dies 2. And a die-closing oil cylinder 4 is arranged between the top die 1 and the upper movable die 2 and between the upper movable die 2 and the lower movable die 3. The main beam 5 is a through long box-shaped beam, the top surface of the main beam is welded on the bottom surface of the top die 1, the jacking oil cylinders 6 are installed on the two longitudinal sides of the main beam 5, and corresponding installation seats are arranged on the two longitudinal sides of the main beam. The lower end of the jacking oil cylinder 6 is supported on the bracket beam 7. Middle part landing leg 8 passes through the bolt and can dismantle the connection in bracket crossbeam 7 bottom for on transmitting the load of whole centre form to die block and system beam pedestal.
obviously, the main beam 5, the jacking cylinder 6, the bracket beam 7 and the middle support leg 8 constitute a support system of the top die 1.
Adjusting support rods 9 are arranged between the main beam 5 and the upper movable die 2 and between the main beam 5 and the lower movable die 3 and used for keeping the shape of the inner die when the beam body is poured.
An adjusting support rod 9 is also arranged between the bracket beam 7 and the top die 1 and used for preventing the template from floating upwards.
As can be seen from fig. 1, the lower moving die 3 includes a detachable straight line section 31 and a lower angle die section 32, which are connected by bolts, and the vertical height H of the straight line section 31 after installation is the difference between the heights of the standard beam and the low-height beam. The lower end of the upper moving die 2 is provided with a hinge lug plate JJEB, and the inner sides of the upper parts of the straight line segment 31 and the lower angle die segment 32 are provided with hinge lug plates corresponding to the lower end of the upper moving die 2. And oil cylinder hinged seats are also arranged on the inner sides of the straight line section 31 and the lower angle mould section 32. The oil cylinder hinged seat on the straight line section 31 is connected with the mould-closing oil cylinder 4.
Fig. 4 is a schematic view of the working state of the low-height beam during prefabrication, and it can be seen from the figure that the top die 1 and the upper moving die 2 are kept unchanged, the straight line segment 31 of the lower moving die 3 is removed, meanwhile, the connection of the lower end of the die retracting oil cylinder 4 between the upper moving die 2 and the lower moving die 3 is detached, the lower corner die section 32 is hinged to the lower end of the upper moving die 2, then the lower end of the die retracting oil cylinder 4 is connected to the lower corner die section 32, and meanwhile, the middle supporting leg 8 with the corresponding height is replaced.
Because when two kinds of high case roof beams of prefabrication, top mould and last movable mould remain unchanged, so as to guarantee that two kinds of not necessary conditions that can share one set of centre form when the case roof beam of co-altitude prefabricates: the outer contour of the top die 1 and the upper moving die 2 after the inner die is completely contracted is smaller than the cavity outlet of the low-height beam, which can be seen from two die contraction states of fig. 2 and 5.
Of course, the straight line section and the lower angle die section of the lower moving die can be made into an integral piece which cannot be disassembled, and the prefabrication of the standard beam and the low-height beam can be realized by integrally replacing the lower moving die. If the lower movable die is an integral piece, the vertical height of the web plate plane section after the lower movable die is installed is ensured to be larger than the height difference between the standard beam and the low-height beam when the standard beam is prefabricated.
When the box girder is constructed, the middle supporting leg needs to be detached and carried out of the girder body after the inner die is demolded and the girder body is longitudinally moved out, and then the middle supporting leg is reinstalled when the next girder is prefabricated. Therefore, for box girders with different heights, the middle supporting legs with corresponding heights are reinstalled, and the transformation time of the internal mold is completely saved.
The utility model overcomes a series of problems of the prior art. The number of sections of the templates is reduced, the assembly difficulty is reduced, the assembly efficiency is improved, and the beam body prefabrication is more attractive while the number of template splicing seams is reduced; the jacking oil cylinder is directly supported above the bracket, so that the main beam has enough height space, the main beam has high rigidity, and the main beam and the top die are welded into a whole, thereby effectively solving the problems of serious template downwarping and unbalanced loading inclination of the template, and ensuring the flatness of the top die more easily; when the inner chamber changes and the beam type is switched, the top die and the upper moving die do not need to be disassembled and assembled, only the lower moving die and the middle supporting leg need to be disassembled and assembled, no extra fragmentary accessories exist, the on-site assembly is facilitated, the working strength of workers is greatly reduced, the working efficiency is improved, and the construction of the box beam is facilitated.
Claims (7)
1. The utility model provides a many high sharing type case roof beam centre forms, includes top mould and top mould braced system, goes up the movable mould, moves down the movable mould and receives the mould hydro-cylinder, goes up the movable mould symmetry and articulates in the both sides of top mould, and the lower extreme of lower movable mould and last movable mould is articulated, goes up between mould and the last movable mould, all installs between movable mould and the lower movable mould and receives the mould hydro-cylinder, its characterized in that: the top die supporting system comprises a through long main beam, a jacking oil cylinder, a bracket cross beam and a middle supporting leg, wherein the top surface of the main beam is fixedly connected to the bottom surface of the top die, the jacking oil cylinder is arranged on the main beam and supported on the bracket cross beam, and the middle supporting leg is detachably connected to the bottom of the bracket cross beam; the outer contour of the top die and the upper moving die after the inner die is contracted is smaller than the outlet of the inner cavity of the box beam with lower height, and when box beams with different heights are prefabricated, the height difference is realized by changing the heights of the lower moving die and the middle supporting leg.
2. the internal mold of a multi-height common box girder according to claim 1, wherein: the lower moving die comprises a detachable straight-line segment and a detachable lower angle die segment, and after the lower moving die is connected with the upper moving die, the vertical height of the straight-line segment is equal to the height difference between box girders with different heights.
3. the internal mold of a multi-height common box girder according to claim 2, wherein: the straight line section and the lower angle mould section are connected through a fastener; the inner sides of the straight line section and the lower angle mould section are both connected with mould-closing oil cylinder hinged seats; when the beam type is switched, the connecting position of the mold closing oil cylinder on the lower movable mold is correspondingly changed.
4. The internal mold of a multi-height common box girder according to claim 1, wherein: the main beam is a box beam, the top surface of the main beam is welded with the bottom surface of the top die, and the two longitudinal sides of the main beam are provided with mounting seats used for connecting the jacking oil cylinders.
5. A multi-height shared type box girder inner mold according to claim 3, wherein: the bracket cross beam is provided with a counter roller for supporting the main beam.
6. The internal mold of a multi-height common box girder according to claim 1, wherein: and adjusting support rods for keeping the shape of the inner mold during beam body pouring are arranged between the main beam and the upper movable mold and between the main beam and the lower movable mold.
7. A multi-height shared type box girder inner mold according to claim 3, wherein: and an adjusting support rod capable of preventing the template from floating upwards is arranged between the bracket cross beam and the top die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822257218.1U CN209737911U (en) | 2018-12-29 | 2018-12-29 | Multi-height shared type box girder internal mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822257218.1U CN209737911U (en) | 2018-12-29 | 2018-12-29 | Multi-height shared type box girder internal mold |
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| Publication Number | Publication Date |
|---|---|
| CN209737911U true CN209737911U (en) | 2019-12-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822257218.1U Active CN209737911U (en) | 2018-12-29 | 2018-12-29 | Multi-height shared type box girder internal mold |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113322815A (en) * | 2021-05-11 | 2021-08-31 | 湖北三峡职业技术学院 | Special-shaped box girder template supporting structure and forming method |
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2018
- 2018-12-29 CN CN201822257218.1U patent/CN209737911U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113322815A (en) * | 2021-05-11 | 2021-08-31 | 湖北三峡职业技术学院 | Special-shaped box girder template supporting structure and forming method |
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Address after: Hunan business culture and Technology Industrial Park, Zhongfang County, Huaihua City, Hunan Province Patentee after: Hunan Wuxin Intelligent Technology Co.,Ltd. Address before: Hunan business culture and Technology Industrial Park, Zhongfang County, Huaihua City, Hunan Province Patentee before: Hunan China Railway Wuxin Steel Mould Co.,Ltd. |