CN219450404U - Thin-wall hollow pier top prestress steel strand construction positioning framework - Google Patents
Thin-wall hollow pier top prestress steel strand construction positioning framework Download PDFInfo
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- CN219450404U CN219450404U CN202320470697.3U CN202320470697U CN219450404U CN 219450404 U CN219450404 U CN 219450404U CN 202320470697 U CN202320470697 U CN 202320470697U CN 219450404 U CN219450404 U CN 219450404U
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Abstract
The utility model provides a construction positioning framework of a prestress steel strand at the pier top of a thin-wall hollow pier, which is erected at the pier top of the thin-wall hollow pier and comprises a girth truss and a forward-bridge framework, wherein the forward-bridge framework is arranged in the girth of the girth truss; the prestress steel strand of the thin-wall hollow pier top penetrates through and is fixed to the enclosure truss and the forward-bridge skeleton, and the main pier steel bars of the thin-wall hollow pier top are also bound to the enclosure truss. After the positioning framework is constructed to the thin-wall hollow pier top by hoisting the prestress steel strand, the main pier steel bars can be bound in the positioning framework, vertical prestress steel strand embedding is carried out, and after the vertical prestress steel strand embedding is finished, an operator can tighten and fix the prestress steel strand through the U-shaped steel bars on the positioning framework, so that the vertical prestress installation is ensured to be accurate and straight, and the construction quality is improved.
Description
Technical Field
The utility model belongs to the field of bridge pier construction, and particularly relates to a construction positioning framework for a thin-wall hollow pier top prestressed steel strand.
Background
The main body of the thin-wall hollow pier is a hollow section, the pier top is a solid section, and prestressed steel strands are buried in the concrete of the pier top solid section and the pier top box girder so as to offset loads, and the service life of the bridge is prolonged.
However, due to space limitation, the construction of the pier top prestress steel strand, especially the positioning work has no reliable operation platform when the pier body is higher, so that the construction safety is seriously affected, and the concrete steps are as follows: (1) When the pier top prestressed steel strand is longer, the prestressed steel strand is difficult to ensure to be vertical; (2) Under the condition that the pier top steel bars are dense, the construction operation space is narrow, the prestress installation efficiency is limited, and the construction quality is difficult to control.
The traditional vertical prestress construction of the high pier mainly adopts the temporary support installed on a template or a main pier steel bar, and the prestress steel strand is fixed layer by layer from bottom to top by using manpower. However, as the rigidity of the steel bar is smaller and the size of the steel bar is longer, the elastic deformation is large during construction, and the influence on the prestress construction operation is larger; although the ordinary positioning framework is provided with the prestressed steel strand, the construction is inconvenient, and the working platform is difficult to install due to the fact that the steel bars are dense, the vertical prestressed steel strand is required to be installed after the steel bar binding is completed, the construction time cannot be fully utilized, and the efficient construction of the main pier is not facilitated.
Disclosure of Invention
The utility model aims to provide a construction positioning framework for a prestress steel strand at the pier top of a thin-wall hollow pier, so as to overcome the technical defects.
In order to solve the technical problems, the utility model provides a construction positioning framework of a prestress steel strand at the top of a thin-wall hollow pier, which is erected at the top of the thin-wall hollow pier and comprises a girth truss and a forward-bridge framework, wherein the forward-bridge framework is arranged in the girth of the girth truss;
the prestress steel strand of the thin-wall hollow pier top penetrates through and is fixed to the enclosure truss and the forward-bridge skeleton, and the main pier steel bars of the thin-wall hollow pier top are also bound to the enclosure truss.
According to the thin-wall hollow pier top prestress steel strand construction positioning framework, the enclosure truss is a rectangular frame structure formed by splicing and surrounding two parallel transverse frames and two parallel connecting frames;
the transverse bridge is arranged on the inner side of the main pier steel bars towards the framework.
According to the construction positioning framework for the prestress steel strand at the pier top of the thin-wall hollow pier, provided by the utility model, a plurality of first U-shaped ribs are arranged in the framework by two transverse bridges, and corrugated pipes for the prestress steel strand to penetrate are fixed in U-shaped openings of the first U-shaped ribs.
According to the thin-wall hollow pier top prestress steel strand construction positioning framework provided by the utility model, the forward-bridge framework is arranged in the enclosure of the enclosure truss and is not contacted with the enclosure truss.
According to the thin-wall hollow pier top prestress steel strand construction positioning framework provided by the utility model, the forward-bridge-oriented framework is arranged in the enclosure of the enclosure truss, and two ends of the forward-bridge-oriented framework are respectively fixed on two transverse-bridge-oriented frameworks.
According to the construction positioning framework for the prestress steel strand at the pier top of the thin-wall hollow pier, provided by the utility model, a plurality of second U-shaped ribs are arranged in the framework along the bridge, and corrugated pipes for the prestress steel strand to penetrate are fixed in U-shaped openings of the second U-shaped ribs.
The beneficial effects of the utility model are as follows:
after the positioning framework is constructed by hoisting the prestressed steel strands to the thin-wall hollow pier top, main pier steel bars can be bound in the positioning framework, vertical prestressed steel strands are pre-buried, after the vertical prestressed steel bundles are pre-buried, the prestressed steel strands are tensioned and fixed by an operator through U-shaped ribs on the positioning framework, so that the vertical prestressed installation is ensured to be accurate and straight, and the construction quality is improved.
In order to make the above-mentioned objects of the present utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
FIG. 1 is an elevation view of a thin-walled hollow pier top prestressed steel strand construction positioning framework.
Fig. 2 is a top view of a first structure of a thin-wall hollow pier top prestressed steel strand construction positioning framework.
Fig. 3 is a first structural application diagram of a thin-wall hollow pier top prestressed steel strand construction positioning framework.
Fig. 4 is a top view of a second structure of a thin-wall hollow pier top prestressed steel strand construction positioning framework.
Fig. 5 is a second structural application diagram of a thin-wall hollow pier top prestressed steel strand construction positioning framework.
Fig. 6 is a schematic illustration of transverse bridge vertical prestress positioning.
Fig. 7 is a schematic illustration of the vertical pre-stressing of the forward bridge.
Reference numerals illustrate:
100. a gird truss;
200. a forward bridge skeleton;
300. a thin wall hollow pier;
400. a main pier steel bar;
500. a transverse bridge skeleton;
600. connecting a framework;
700. a first U-shaped rib;
800. and a second U-shaped rib.
Detailed Description
Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present utility model with specific examples.
In the utility model, the upper, lower, left and right in the drawing are regarded as the upper, lower, left and right of the thin-wall hollow pier top prestress steel strand construction positioning framework described in the specification.
The exemplary embodiments of the present utility model will now be described with reference to the accompanying drawings, however, the present utility model may be embodied in many different forms and is not limited to the examples described herein, which are provided to fully and completely disclose the present utility model and fully convey the scope of the utility model to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the utility model. In the drawings, like elements/components are referred to by like reference numerals.
Unless otherwise indicated, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. In addition, it will be understood that terms defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Referring to fig. 1, the present embodiment relates to a prestressed steel strand construction positioning framework at the top of a thin-walled hollow pier, which is erected at the top of the thin-walled hollow pier, as shown in fig. 2 or fig. 4, and comprises a girth truss 100 and a forward-bridge framework 200, wherein the forward-bridge framework 200 is disposed in the girth of the girth truss 100.
The pier top of the thin-wall hollow pier 300 is a solid section, and before the solid section is poured, main pier steel bars 400 and prestressed steel strands need to be arranged in advance, and referring to fig. 3 or 5, the prestressed steel strands of the thin-wall hollow pier top penetrate through and are fixed on the enclosure truss 100 and the forward-bridge skeleton 200, and the main pier steel bars 400 of the thin-wall hollow pier top are also bound on the enclosure truss 100.
That is, the positioning framework can be used for binding the main pier steel bars 400, and meanwhile, the problem that the vertical prestress steel strand is difficult to position can be solved.
Referring to fig. 2 or 4, it can be seen that the enclosure truss 100 is a rectangular frame structure formed by splicing and surrounding two parallel transverse girders 500 and two parallel coupling girders 600, and the rectangular frame structure is composed of an inner frame and an outer frame, wherein the inner frame is close to the thin-wall hollow pier 300 (as shown in fig. 3 or 5), the outer frame is close to the outer frame, the whole circle of main pier steel bars 400 are arranged close to the outer frame, the transverse girders 500 are arranged on the inner sides of the main pier steel bars 400, and the main pier steel bars 400 are arranged at the positions of the frames of the coupling girders 600, so that the main pier steel bars 400 can be bound on the transverse girders 500 and the coupling girders 600, i.e. the enclosure truss 100 can be used as a construction platform for binding steel bars.
Prefabricating a plurality of prestress steel strand construction positioning frameworks according to the height of the bridge pier, connecting the positioning frameworks section by section, specifically, welding positioning steel bars at corresponding positions of the enclosure truss 100 according to the distance and the direction of the main pier steel bars 400, and positioning each main pier steel bar 400; and hoisting the frameworks of all parts in place according to the cross section size of the main pier, hoisting the transverse framework 500 and the parallel-to-bridge framework 200 to corresponding positions, fixing the frameworks by bolts, installing the connecting framework 600 at a proper position, determining the position of the upper transverse positioning framework according to the size of the prefabricated steel bars, and connecting and fastening all the components by bolts.
And after the steel strand construction positioning framework is installed in place, binding the main pier steel bars 400.
The transverse bridge skeleton 500 and the forward bridge skeleton 200 are formed by welding and fixing a plurality of section steel, parallel connection, upright posts, transverse connection, scissors supports and the like.
The connecting skeleton 600 is formed by welding and fixing a plurality of section steel, parallel connection, upright posts, transverse connection and the like.
Referring to fig. 6, a plurality of first U-shaped ribs 700 are installed in the two transverse bridge skeletons 500, and bellows for penetrating the prestressed steel strands are fixed in the U-shaped openings of the first U-shaped ribs 700; referring to fig. 7, a plurality of second U-shaped ribs 800 are installed in the forward bridge framework 200, and bellows through which prestressed steel strands penetrate are fixed in the U-shaped openings of the second U-shaped ribs 800.
The first U-shaped rib 700 and the second U-shaped rib 800 have the same function, and are used for fixing the prestress steel strand in the corrugated pipe in a pulling manner so as to ensure that the vertical prestress installation is accurate and straight.
The installation of the prestress steel strand is as follows:
before the construction positioning framework of the prestressed steel strand is installed, marking is carried out on the construction positioning framework of the prestressed steel strand according to the position of the vertical prestressed steel strand of the main pier, and the installation position of the vertical prestressed steel strand is determined; after the prestress steel strand construction positioning framework is in place, vertical prestress steel strand embedding is carried out; after the vertical prestress steel strand is embedded, the steel strands are tensioned as much as possible along the vertical direction, U-shaped positioning ribs (a first U-shaped rib 700 and a second U-shaped rib 800) are installed one by one according to the positioning marks made in advance, and after the construction positioning framework of the next prestress steel strand is assembled, repeated operation is performed to ensure that each vertical prestress steel strand is positioned accurately.
In the embodiment of the utility model, a safe and reliable construction platform is provided for the operation of the vertical prestress steel strand, the construction risk is greatly reduced, after the construction positioning framework of the prestress steel strand is assembled at the designated positions of a bridge deck or the ground and the like, the construction positioning framework of the vertical prestress steel strand is hoisted to be in place, the vertical prestress operation can be carried out, after the vertical prestress steel strand is completed, the vertical prestress steel strand can also be used as the positioning framework, an operator can tighten and fix the prestress steel strand through the U-shaped positioning rib, the vertical prestress installation is ensured to be accurate and straight, the construction quality is improved, and compared with the traditional prestress positioning framework, the novel vertical prestress stiffness framework has high rigidity and stable structure, the connection among the components is mechanical connection, the positions of the components can be randomly adjusted, and the construction method is more convenient.
For convenience in transportation and lifting, the enclosure truss 100 and the forward-bridge framework 200 may be split and not in contact at all, and as shown in fig. 3, the forward-bridge framework 200 is placed in the enclosure of the enclosure truss 100 and not in contact with the enclosure.
To ensure the connection strength, the forward-bridge-direction skeleton 200 is connected to the enclosure truss 100, referring to fig. 5, the forward-bridge-direction skeleton 200 is disposed in the enclosure of the enclosure truss 100, and both ends of the forward-bridge-direction skeleton 200 are respectively fixed to two lateral-bridge-direction skeletons 500.
It should be noted that the number of the forward-bridge skeletons 200 is not limited, and may be two as shown in fig. 2 to 5, or may be other number.
The prestress steel strand construction positioning framework solves the problems of difficult binding of the steel bars and difficult positioning of vertical prestress caused by high-altitude operation in the traditional high pier construction, effectively ensures accurate spacing between the steel bars and the vertical prestress steel strands, and ensures construction quality. The prestressed steel strand construction positioning framework can be used as a construction platform when being used as a stiff framework, so that the problem of narrow operation space caused by dense reinforcement and vertical prestress due to main pier construction is solved, and the construction safety is ensured.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples of carrying out the utility model and that various changes in form and details may be made therein without departing from the spirit and scope of the utility model.
Claims (6)
1. The construction positioning framework for the prestressed steel strands of the pier top of the thin-wall hollow pier is erected on the pier top of the thin-wall hollow pier and is characterized by comprising a girth truss (100) and a forward-bridge framework (200), wherein the forward-bridge framework (200) is arranged in the girth of the girth truss (100);
the prestress steel strand of the thin-wall hollow pier top penetrates through and is fixed to the enclosure truss (100) and the forward-bridge skeleton (200), and the main pier steel bars (400) of the thin-wall hollow pier top are also bound to the enclosure truss (100).
2. The construction positioning framework for the prestress steel strand of the pier top of the thin-wall hollow pier according to claim 1, wherein the enclosure truss (100) is a rectangular frame structure formed by splicing and surrounding two parallel transverse frameworks (500) and two parallel connecting frameworks (600);
the transverse bridge skeleton (500) is arranged on the inner side of the main pier steel bar (400).
3. The construction positioning framework for the prestressed steel strands at the pier top of the thin-wall hollow pier according to claim 2, wherein a plurality of first U-shaped ribs (700) are installed in the framework (500) of the two transverse bridges, and corrugated pipes for the prestressed steel strands to penetrate through are fixed in U-shaped openings of the first U-shaped ribs (700).
4. The thin-walled hollow pier top prestressed steel strand construction positioning skeleton of claim 1, wherein the forward-bridging skeleton (200) is placed in the enclosure of the enclosure truss (100) without contact.
5. The thin-wall hollow pier top prestressed steel strand construction positioning framework of claim 2, wherein the forward-bridge-oriented framework (200) is arranged in the enclosure of the enclosure truss (100), and two ends of the forward-bridge-oriented framework (200) are respectively fixed to two transverse-bridge-oriented frameworks (500).
6. The construction positioning framework for the prestressed steel strands at the top of the thin-wall hollow pier according to claim 4 or 5, wherein a plurality of second U-shaped ribs (800) are installed in the forward-bridge framework (200), and corrugated pipes for the prestressed steel strands to penetrate through are fixed in U-shaped openings of the second U-shaped ribs (800).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320470697.3U CN219450404U (en) | 2023-03-13 | 2023-03-13 | Thin-wall hollow pier top prestress steel strand construction positioning framework |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320470697.3U CN219450404U (en) | 2023-03-13 | 2023-03-13 | Thin-wall hollow pier top prestress steel strand construction positioning framework |
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| CN219450404U true CN219450404U (en) | 2023-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202320470697.3U Active CN219450404U (en) | 2023-03-13 | 2023-03-13 | Thin-wall hollow pier top prestress steel strand construction positioning framework |
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| CN (1) | CN219450404U (en) |
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- 2023-03-13 CN CN202320470697.3U patent/CN219450404U/en active Active
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