CN212146897U - Inner formwork supporting and anti-floating structure of large box girder - Google Patents
Inner formwork supporting and anti-floating structure of large box girder Download PDFInfo
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- CN212146897U CN212146897U CN201921918595.3U CN201921918595U CN212146897U CN 212146897 U CN212146897 U CN 212146897U CN 201921918595 U CN201921918595 U CN 201921918595U CN 212146897 U CN212146897 U CN 212146897U
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- pull rod
- box girder
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- steel plate
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Abstract
The utility model discloses an inner formwork of large-scale case roof beam supports and anti-floating structure, including the support column, pull rod and fastening structure, the length more than or equal to case roof beam bottom plate thickness of support column, the both ends of support column are provided with the end-capped steel sheet, the pull rod includes upper pull rod and lower pull rod, the lower extreme of upper pull rod passes the end-capped steel sheet that is located the support column upper end and is rather than threaded connection, the upper end of lower pull rod passes the end-capped steel sheet that is located the support column lower extreme and rather than threaded connection, fastening structure includes upper fastening structure and lower fastening structure, upper fastening structure sets up in the upper end of upper pull rod and makes the upper pull rod be fixed in on chassis crossbeam or chassis longeron, lower fastening structure sets up in the lower extreme of lower pull; the inner template supporting and anti-floating structure of the large box girder provides stable supporting and anti-floating force for the box girder inner mold, has simple and reliable structure, can be industrially produced into an industrial product, and has low cost.
Description
Technical Field
The utility model relates to a template structure technical field for the building, concretely relates to inner formword of large-scale case roof beam supports and anti structure of floating.
Background
The box girder adopts prefabrication method production or support method cast in situ concrete box girder in present bridge, generally adopts the full section method to accomplish the pouring of box girder concrete once in order to improve quality, need to install box girder die block, external mold, box girder cavity's centre form and box girder end mould back pour box girder concrete, because the cross section of box girder cavity all adopts big-end-up's cross-sectional shape, so the inboard mould slope of web sets up, can produce ascending buoyancy to the centre form at box girder bottom plate and box girder web concrete pouring's in-process, and can use the centre form to produce inhomogeneous lateral pressure and lead to the centre form to shift.
The bottom of the box girder internal mold is generally supported on the steel bars at present, the deformation of the steel bars can be caused, the supporting points can not increase larger vertical supporting force and can not effectively restrain the horizontal movement of the internal mold, in addition, the internal mold is prevented from floating by adopting a method of top surface weight pressing of the internal mold or arranging a pressing rod at present, the operation of the method is difficult, particularly, the width of the box girder top plate of a large-sized box girder is large, and the method is not suitable for use.
Therefore, there is a need for an inner formwork support and anti-floating structure for large box girders to solve the problems of the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defect among the prior art, provide an inner formword of large-scale case roof beam supports and anti structure of floating, for the case roof beam centre form provides firm support and anti buoyancy, simple structure is reliable.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
an inner template supporting and anti-floating structure of a large box girder comprises supporting columns, pull rods and fastening structures;
the length of the supporting column is greater than or equal to the thickness of the bottom plate of the box girder, and end-sealing steel plates are arranged at two ends of the supporting column;
the pull rod comprises an upper pull rod and a lower pull rod, the lower end of the upper pull rod penetrates through the end-capped steel plate positioned at the upper end of the supporting column and is in threaded connection with the end-capped steel plate, and the upper end of the lower pull rod penetrates through the end-capped steel plate positioned at the lower end of the supporting column and is in threaded connection with the end-capped steel plate;
the fastening structure comprises an upper fastening structure and a lower fastening structure, the upper fastening structure is arranged at the upper end of the upper pull rod to enable the upper pull rod to be fixed on the chassis cross beam or the chassis longitudinal beam, and the lower fastening structure is arranged at the lower end of the lower pull rod to enable the lower pull rod to be fixed on the bottom die back edge.
In order to further realize the utility model discloses, still include the outer tube, the internal diameter of outer tube is greater than the external diameter of support column, the outside of support column is located to the outer tube cover, the length of outer tube equals with the length of support column.
In order to further realize the utility model, the outer sleeve pipe adopts the PVC plastic tubing.
In order to further realize the utility model discloses, the internal diameter of outer tube is 5mm bigger than the external diameter of support column.
In order to further realize the utility model, the support column is made of steel pipes, the outer diameter of the support column is 50-100mm, and the wall thickness of the support column is 5-10 mm.
In order to further realize the utility model, the length of the supporting column is 5-20cm larger than the thickness of the bottom plate of the box girder.
In order to further realize the utility model, the thickness of the end-capped steel plate is 50-100 mm.
In order to further realize the utility model discloses, go up pull rod and lower link and be the round steel or the finish rolling screw rod iron that the surface rolled threaded tooth.
In order to further realize the utility model discloses, open the centre of end capping steel sheet has the trompil that runs through its upper and lower surface, the aperture of trompil is greater than the diameter of pull rod, the medial surface of end capping steel sheet is provided with end capping steel sheet nut, end capping steel sheet nut's axis coincides mutually with the axis of trompil, the lower extreme of going up the pull rod passes the trompil that is located the end capping steel sheet of support column upper end and rather than last end capping steel sheet nut threaded connection, the upper end of lower link is passed the trompil that is located the end capping steel sheet of support column lower extreme and is connected with its.
In order to further realize the utility model discloses, go up fastening structure and fastening structure down all include the anchor cushion and be located the anchor cushion outside and compress tightly the fastening nut of anchor cushion.
Advantageous effects
The utility model provides an inner template of case roof beam supports and anti-floating structure, for the case roof beam centre form provide firm support and anti-floating force, the concrete is pressed on the case roof beam bottom plate when the case roof beam carries out case roof beam bottom plate and case roof beam web concreting, transmit concrete gravity and case roof beam bottom plate gravity to the case roof beam centre form through supporting and anti-floating pull rod structure, offset the buoyancy that newly-poured concrete produced to the case roof beam inner template, simple and reliable in construction simultaneously, it is convenient to install and remove, can repeat the turnover use, green; and the structure can be industrially produced into an industrial product, and the cost is low.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is the structure schematic diagram of the utility model installed in the box girder.
Description of reference numerals:
1. a support pillar; 11. end-capped steel plates; 12. opening a hole; 13. end-capping the steel plate nut; 2. an outer sleeve; 31. an upper pull rod; 32. a lower pull rod; 41. an upper fastening structure; 42. a lower fastening structure; 43. compressing the anchoring cushion block; 44. and (5) tightening the nut.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings, which are simplified schematic drawings and only schematically illustrate the basic structure of the invention.
Example one
As shown in fig. 1-2, the inner formwork of the large box girder of the present invention supports and resists floating the structure including the support column 1, the outer sleeve 2, the pull rod and the fastening structure, wherein:
the support column 1 is made of a steel pipe, the outer diameter of the support column is preferably 50-100mm, the wall thickness of the support column is preferably 5-10mm, and the length of the support column is 5-20cm larger than the thickness of the bottom plate of the box girder;
the two ends of the supporting column 1 are provided with end-capped steel plates 11, the end-capped steel plates 11 are round steel plates, the size of the end-capped steel plates does not exceed the cross section of the supporting column 1, the end-capped steel plates 11 and the supporting column 1 are fixed through welding, the thickness of the end-capped steel plates 11 is 50-100mm, the middle of each end-capped steel plate 11 is provided with an opening 12 penetrating through the upper surface and the lower surface of the end-capped steel plate, the aperture of each opening 12 is slightly larger than the diameter of the pull rod, the inner side surface of each end-capped steel plate; the inner side surface of the end-capped steel plate 11 is a surface facing the two end-capped steel plates 11.
The inner diameter of the outer sleeve 2 is slightly larger than the outer diameter of the support column 1, specifically, the inner diameter of the outer sleeve 2 is 2-5mm larger than the outer diameter of the support column 1, the outer sleeve 2 is sleeved outside the support column 1, the length of the outer sleeve 2 is equal to that of the support column 1, the outer sleeve 2 is made of a plastic pipe, specifically, a PVC plastic pipe can be adopted, and by arranging the outer sleeve 2, the outer sleeve 2 stays in the box girder after the pouring of the box girder concrete is completed, so that the support column 1 is convenient to dismantle for repeated use.
The pull rod comprises an upper pull rod 31 and a lower pull rod 32, the lower end of the upper pull rod 31 penetrates through a sealing end steel plate 11 positioned at the upper end of the support column 1 and is in threaded connection with the upper end of the lower pull rod 31, the upper end of the lower pull rod 32 penetrates through a sealing end steel plate 11 positioned at the lower end of the support column 1 and is in threaded connection with the lower end of the support column 1, specifically, the upper pull rod 31 and the lower pull rod 32 are round steel or finish rolling screw steel rods with screw teeth rolled on the surfaces, the lower end of the upper pull rod 31 penetrates through an opening 12 of the sealing end steel plate 11 positioned at the upper end of the support column 1 and is in threaded connection with a sealing end steel plate nut 13 on the opening 12.
The fastening structure comprises an upper fastening structure 41 and a lower fastening structure 42, the upper fastening structure 41 is arranged at the upper end of the upper pull rod 31 to enable the upper pull rod 31 to be fixed on the underframe cross beam or underframe longitudinal beam, and the lower fastening structure 42 is arranged at the lower end of the lower pull rod 32 to enable the lower pull rod 32 to be fixed on the bottom die back edge; the upper fastening structure 41 and the lower fastening structure 42 each include an anchor pad 43 and a fastening nut 44 located outside the anchor pad 43 and pressing the anchor pad 43. The box girder and the underframe comprise underframe crossbeams, underframe longitudinal beams and other structures, the underframe crossbeams and the underframe longitudinal beams are respectively arranged in a transversely-longitudinally staggered manner, and the underframe longitudinal beams are fixed at the bottoms of the underframe crossbeams.
The use process of the inner template supporting and anti-floating structure is as follows:
1. the box girder bottom die is manufactured by arranging an inner die support and an anti-floating pull rod on a bottom die panel, after the box girder bottom die is arranged, and box girder bottom plate steel bars, box girder web plate steel bars and embedded parts are arranged, arranging a bottom support pillar and a lower pull rod on the bottom die plate, wherein the lower pull rod penetrates through the bottom die panel and is anchored on a bottom die back ridge through a lower fastening structure, the bottom surface of the support pillar is closely attached to the bottom die panel, and slurry is prevented from leaking from the open hole of the bottom die panel when the box girder is poured.
2. And installing an outer sleeve, and sleeving the outer sleeve on the outer side of the support column from top to bottom.
3. Mounting an inner box girder template to enable the underframe longitudinal beam to be supported on the support columns, wherein the bottom surface of the underframe longitudinal beam is in contact with the support columns and the top surfaces of the outer sleeves; the bottom surface of the outer sleeve is closely attached to the bottom die panel under the action of the pressure of the inner die, so that slurry is prevented from entering the outer sleeve to influence the dismounting of the supporting column during the concrete pouring of the box girder. Because the length of the supporting column is 5-20cm larger than the thickness of the bottom plate of the box girder, the top surface of the supporting column is higher than the concrete surface of the bottom plate of the box girder, and the bottom surface of the inner mold underframe is higher than the concrete surface of the bottom plate of the box girder, thereby facilitating concrete construction and underframe longitudinal beam dismantling.
4. The upper pull rod is installed and used for fixing the inner template, the upper pull rod penetrates through the underframe longitudinal beam of the inner template and is anchored on the underframe longitudinal beam through the upper fastening structure, the upper pull rod also can penetrate through the underframe longitudinal beam of the inner template and then penetrates through the underframe cross beam and is anchored on the cross beam through the upper fastening structure, the underframe longitudinal beam and the delivery cross beam can adopt double-spliced section steel, and the middle space of the double-spliced section steel is a certain distance so that the upper pull rod can penetrate through the upper pull rod.
5. And after the inner template is installed, continuously completing the installation of the steel bars and the embedded parts of the top plate of the box girder and the installation of other templates, and then completing the concrete pouring of the box girder.
6. The upper pull rod is firstly removed before the inner formwork is removed, then the bottom frame of the inner formwork is removed, then the lower pull rod and the supporting columns are removed, holes left in the bottom plate of the box girder after the supporting columns are removed can be used as air holes, and concrete can be used for plugging according to needs.
7. The support and anti-floating pull rod structure can be repeatedly used, and is used for other box girder constructions.
It should be noted that the box girder bottom mold of the lower pull rod structure needs to be overhead, so that a constructor can conveniently enter the lower portion of the box girder bottom mold to install and remove the lower pull rod structure.
In addition, two sets of inner formwork supporting and anti-floating structures are arranged on one cross section, and the longitudinal distance between the inner formwork supporting and anti-floating structures is 80-120 cm.
The utility model provides an inner template of case roof beam supports and anti-floating structure, for the case roof beam centre form provide firm support and anti-floating force, the concrete is pressed on the case roof beam bottom plate when the case roof beam carries out case roof beam bottom plate and case roof beam web concreting, transmit concrete gravity and case roof beam bottom plate gravity to the case roof beam centre form through supporting and anti-floating pull rod structure, offset the buoyancy that newly-poured concrete produced to the case roof beam inner template, simple and reliable in construction simultaneously, it is convenient to install and remove, can repeat the turnover use, green; and the structure can be industrially produced into an industrial product, and the cost is low.
The above is only the preferred embodiment of the present invention, the present invention is not limited to the above embodiment, there may be local minor structural modification in the implementation process, if it is right that various modifications or variations of the present invention do not depart from the spirit and scope of the present invention, and belong to the claims and the equivalent technical scope of the present invention, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. An inner template supporting and anti-floating structure of a large box girder is characterized by comprising supporting columns, pull rods and fastening structures;
the length of the supporting column is greater than or equal to the thickness of the bottom plate of the box girder, and end-sealing steel plates are arranged at two ends of the supporting column;
the pull rod comprises an upper pull rod and a lower pull rod, the lower end of the upper pull rod penetrates through the end-capped steel plate positioned at the upper end of the supporting column and is in threaded connection with the end-capped steel plate, and the upper end of the lower pull rod penetrates through the end-capped steel plate positioned at the lower end of the supporting column and is in threaded connection with the end-capped steel plate;
the fastening structure comprises an upper fastening structure and a lower fastening structure, the upper fastening structure is arranged at the upper end of the upper pull rod to enable the upper pull rod to be fixed on the chassis cross beam or the chassis longitudinal beam, and the lower fastening structure is arranged at the lower end of the lower pull rod to enable the lower pull rod to be fixed on the bottom die back edge.
2. The inner formwork supporting and anti-floating structure of a large box girder according to claim 1, further comprising an outer sleeve, wherein the inner diameter of the outer sleeve is larger than the outer diameter of the supporting column, the outer sleeve is sleeved outside the supporting column, and the length of the outer sleeve is equal to the length of the supporting column.
3. The inner formwork supporting and anti-floating structure of the large box girder according to claim 2, wherein the outer sleeve is made of PVC plastic pipe.
4. The inner formwork supporting and anti-floating structure of a large box girder according to claim 2, wherein the inner diameter of the outer sleeve is 5mm larger than the outer diameter of the supporting column.
5. The inner formwork supporting and anti-floating structure of the large box girder according to claim 1, wherein the supporting columns are steel pipes, the outer diameter of the supporting columns is 50-100mm, and the wall thickness of the supporting columns is 5-10 mm.
6. The inner formwork supporting and anti-floating structure of a large box girder according to claim 1, wherein the length of the supporting column is 5-20cm greater than the thickness of the bottom plate of the box girder.
7. The inner formwork supporting and anti-floating structure of the large box girder according to claim 1, wherein the thickness of the end-capped steel plate is 50-100 mm.
8. The inner formwork supporting and anti-floating structure of the large box girder according to claim 1, wherein the upper tie bar and the lower tie bar are round steel or finish-rolled screw steel bars with thread-rolled surfaces.
9. The inner formwork supporting and anti-floating structure of the large box girder according to claim 1, wherein the middle of the end-capped steel plate is provided with an opening penetrating through the upper and lower surfaces thereof, the aperture of the opening is larger than the diameter of the pull rod, the inner side surface of the end-capped steel plate is provided with an end-capped steel plate nut, the axis of the end-capped steel plate nut coincides with the axis of the opening, the lower end of the upper pull rod penetrates through the opening of the end-capped steel plate positioned at the upper end of the supporting column and is in threaded connection with the end-capped steel plate nut thereon, and the upper end of the lower pull rod penetrates through the opening of the end-capped steel plate positioned at the lower.
10. The inner formwork support and anti-floating structure of a large box girder according to claim 1, wherein the upper fastening structure and the lower fastening structure each comprise an anchor pad and a fastening nut located outside the anchor pad and pressing the anchor pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921918595.3U CN212146897U (en) | 2019-11-08 | 2019-11-08 | Inner formwork supporting and anti-floating structure of large box girder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921918595.3U CN212146897U (en) | 2019-11-08 | 2019-11-08 | Inner formwork supporting and anti-floating structure of large box girder |
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| Publication Number | Publication Date |
|---|---|
| CN212146897U true CN212146897U (en) | 2020-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921918595.3U Active CN212146897U (en) | 2019-11-08 | 2019-11-08 | Inner formwork supporting and anti-floating structure of large box girder |
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| CN (1) | CN212146897U (en) |
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