CN215668975U - Interim prestressing force PVC of segment beam web reserves pore structure - Google Patents
Interim prestressing force PVC of segment beam web reserves pore structure Download PDFInfo
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- CN215668975U CN215668975U CN202122275158.8U CN202122275158U CN215668975U CN 215668975 U CN215668975 U CN 215668975U CN 202122275158 U CN202122275158 U CN 202122275158U CN 215668975 U CN215668975 U CN 215668975U
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Abstract
The utility model relates to a temporary prestressed PVC (polyvinyl chloride) preformed hole structure of a segmental beam web, which comprises the following components: segmental beam web body, protection steel sheet, screw-thread steel and fixed steel anchor block, the protection steel sheet is arranged in segmental beam web body both sides, one side is arranged in to the fixed steel anchor block protection steel sheet upper surface, the screw-thread steel runs through segmental beam web body the protection steel sheet reaches the fixed steel anchor block to fasten through the nut. According to the utility model, the PVC preformed hole structure of the segmental beam web is optimized, the U-shaped bolts and the steel plates embedded in the segmental beam web are changed into the PVC preformed holes, the fixed connection mode of the temporary tensioning structure and the beam body is innovated by means of the preformed holes and the deformed steel bars, all steel structural members are detachable, the installation and the disassembly are convenient, the whole hole can be quickly circulated to the next hole after the construction is completed, and the cost input is reduced.
Description
Technical Field
The utility model relates to the technical field of traffic bridge construction, in particular to a temporary prestressed PVC preformed hole structure of a segmental beam web.
Background
In the modern bridge construction process, the segment prefabrication technology is increasingly applied and popularized with the advantages of economy, high efficiency, environmental protection and the like. The construction method of the glued joint type section prefabricated assembled box girder is that a bridge structure is divided into a series of sections along a central line, each section is industrially produced in a factory and then is transported to a construction site for section assembly, and splicing gaps among the sections are sealed by epoxy resin. Before applying permanent prestress to connect the segments into a whole, temporary prestress is applied between the segments to temporarily fix the segments; at present, the conventional method for applying temporary prestress to the section precast box girder adopts a concrete anchor block, the manufacturing process is complex, the quality is poor, the concrete anchor block cannot be reused for many times, the concrete anchor block is not easy to detach after the construction is finished, and the working efficiency is low.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems in the prior art and provides a temporary prestressed PVC preformed hole structure of a segmental beam web.
In order to realize the purpose of the utility model, the utility model adopts the technical scheme that:
a segment beam web temporary pre-stressed PVC preformed hole structure, comprising: segmental beam web body, protection steel sheet, screw-thread steel and fixed steel anchor block, the protection steel sheet is arranged in segmental beam web body both sides, one side is arranged in to the fixed steel anchor block protection steel sheet upper surface, the screw-thread steel runs through segmental beam web body the protection steel sheet reaches the fixed steel anchor block to fasten through the nut.
Preferably, the segmental beam web body is provided with a PVC preformed hole, and the deformed steel bar penetrates through the segmental beam web body through the PVC preformed hole.
Preferably, the protection steel plate is provided with a preformed hole corresponding to the PVC preformed hole, and the deformed steel bar is avoided.
Preferably, the fixing steel anchor block comprises: the steel plate comprises a bottom plate, two pieces of connecting steel and two pieces of reinforcing steel; the two pieces of connecting steel are arranged in parallel and vertically welded on the bottom plate, and the two pieces of reinforcing steel are perpendicular to the bottom plate and are arranged between the two pieces of parallel connecting steel and perpendicular to the connecting steel.
Preferably, the bottom plate is provided with a first round hole matched with the PVC preformed hole, and the connecting steel is provided with a second round hole.
Compared with the prior art, the temporary prestressed PVC preformed hole structure of the segmental beam web provided by the utility model has the following advantages:
the utility model provides a temporary prestressed PVC (polyvinyl chloride) preformed hole structure of a segmental beam web, which is characterized in that a U-shaped bolt and a steel plate which are pre-embedded at the traditional segmental beam web are changed into a PVC preformed hole by optimizing the segmental beam web structure, the innovation of a fixed connection mode of a temporary tensioning structure and a beam body is realized by virtue of the PVC preformed hole and deformed steel bars, all steel structural members are detachable, the installation and the detachment are convenient, the temporary prestressed PVC preformed hole structure can be quickly circulated to the next hole after the whole hole construction is completed, and the cost input is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic cross-sectional view of a segmented spar web body of the present invention;
FIG. 2 is an elevation view of a fixed steel anchor block of the present invention;
fig. 3 is a top view of the anchor block of the present invention.
In the figure: 1-section beam web plate body, 2-protective steel plate, 3-deformed steel, 4-fixed steel anchor block, 5-PVC preformed hole, 6-bottom plate, 7-connecting steel, 8-reinforcing steel, 9-first round hole and 10-second round hole.
Detailed Description
The technical scheme of the utility model is further explained by combining the drawings and the embodiment as follows:
as shown in fig. 1, a segment beam web temporary prestressed PVC preformed hole structure comprises: segmental beam web body 1, protection steel sheet 2, screw-thread steel 3 and fixed steel anchor block 4, protection steel sheet 2 is arranged in 1 both sides of segmental beam web body, one side is arranged in to fixed steel anchor block 4 protection steel sheet 2 upper surface, screw-thread steel 3 runs through segmental beam web body 1 protection steel sheet 2 reaches fixed steel anchor block 4 to fasten through the nut.
In a preferred embodiment, the section beam web body 1 is provided with a PVC preformed hole 5, and the deformed steel bar 3 penetrates through the section beam web body 1 through the PVC preformed hole 5.
As a preferred embodiment, the protection steel plate 2 is provided with a prepared hole corresponding to the PVC prepared hole 5, and the deformed steel bar 3 is avoided.
As shown in fig. 2-3, as a preferred embodiment, the anchor block 4 of steel comprises: a bottom plate 6, two pieces of connecting steel 7 and two pieces of reinforcing steel 8; the two pieces of connecting steel 7 are arranged in parallel and vertically welded on the bottom plate 6, and the two pieces of reinforcing steel 8 are perpendicular to the bottom plate 6, arranged between the two pieces of parallel connecting steel and perpendicular to the connecting steel 7. The reinforcing steel 8 is used for stabilizing the two connecting steels 7, and deformation of the two connecting steels 7 caused by temporary prestress applied by a jack is avoided.
As a preferred embodiment, the bottom plate 6 is provided with a first circular hole 9 matched with the PVC preformed hole, the connection steel 7 is provided with a second circular hole 10, the first circular hole 9 is used for being fastened with the deformed steel bar 3 through a nut, and the second circular hole 10 penetrates through a thick steel bar for temporary prestress tensioning.
The working principle of the utility model is as follows:
firstly, threaded steel penetrates into PVC preformed holes which are arranged in advance, then protective steel plates are arranged on two sides of a segmental beam web plate corresponding to the threaded steel positions, then fixed steel anchor blocks are arranged at the upper end of the protective steel plate on one side of the segmental beam web plate and fastened through nuts, finally phi 32PSB830 prestressed thick steel bars are adopted, the temporary prestress of web plate glue joints between two adjacent segmental beams needs to adopt metal corrugated pipes to pre-embed pore channels in a beam body, and after tensioning is completed, pore channel grouting is carried out. The tension of each thick steel bar of the glue joint between two adjacent sections of beams is 600kN, and the tension of each thick steel bar of the rest glue joints is 430 kN. Tensioning is carried out by 4 80t hydraulic jacks, 8 prestressed coarse steel bars are used in total, and the tensioning is finished by synchronously stretching for 2 times up and down and left and right. And after the temporary prestress is applied, removing the fixed steel anchor block and the protective steel plate, taking out the deformed steel bar, and recycling the deformed steel bar to the next section corresponding to the PVC preformed hole. In order to ensure that the joint surface is uniformly glued, the left and right and up and down symmetry of the segmental beam web is kept to be synchronously carried out during tensioning, and the epoxy resin glue is cured under the pressure of not less than 0.3 MPa. The width of the glue seam after extrusion is preferably between 0.6 and 1.2mm, and the phenomenon of glue shortage should not occur. The primary curing time of the epoxy sealant is more than 2 hours, and the complete curing time is 24 hours. The temporary prestressing is removable after the first longitudinal permanent prestressing tensioning of the box girder has been completed.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. A section beam web temporary prestressing force PVC preformed hole structure which characterized in that includes: segmental beam web body (1), protection steel sheet (2), screw-thread steel (3) and fixed steel anchor block (4), protection steel sheet (2) are arranged in segmental beam web body (1) both sides, fixed steel anchor block (4) are arranged in the surface of protection steel sheet (2), screw-thread steel (3) run through segmental beam web body (1) protection steel sheet (2) reach fixed steel anchor block (4) to fasten through the nut.
2. A segment spar web temporary pre-stressed PVC preformed hole structure according to claim 1, characterized in that the segment spar web body (1) is provided with PVC preformed holes (5), the screw steel (3) penetrates the segment spar web body (1) through the PVC preformed holes (5).
3. The temporary prestressed PVC preformed hole structure of the segmental beam web according to claim 1, characterized in that the protective steel plate (2) is provided with preformed holes corresponding to the PVC preformed holes (5) to avoid the deformed steel bar (3).
4. A segment beam web temporary pre-stressed PVC preformed hole structure according to claim 1, characterized in that the anchoring steel anchor block (4) comprises: a bottom plate (6), two pieces of connecting steel (7) and two pieces of reinforcing steel (8); the two pieces of connecting steel (7) are arranged in parallel and vertically welded on the bottom plate (6), and the two pieces of reinforcing steel (8) are perpendicular to the bottom plate (6) and are arranged between the two pieces of parallel connecting steel and perpendicular to the connecting steel (7).
5. The temporary prestressed PVC preformed hole structure of the segmental beam web according to claim 4, characterized in that the bottom plate (6) is provided with a first round hole (9) matched with the PVC preformed hole, and the connecting steel (7) is provided with a second round hole (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122275158.8U CN215668975U (en) | 2021-09-18 | 2021-09-18 | Interim prestressing force PVC of segment beam web reserves pore structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122275158.8U CN215668975U (en) | 2021-09-18 | 2021-09-18 | Interim prestressing force PVC of segment beam web reserves pore structure |
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| Publication Number | Publication Date |
|---|---|
| CN215668975U true CN215668975U (en) | 2022-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122275158.8U Active CN215668975U (en) | 2021-09-18 | 2021-09-18 | Interim prestressing force PVC of segment beam web reserves pore structure |
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| CN (1) | CN215668975U (en) |
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2021
- 2021-09-18 CN CN202122275158.8U patent/CN215668975U/en active Active
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