A steel beam portal column internal vertical prestress installation device and method

Abstract

The application discloses a kind of steel beam portal pier interior vertical prestress installation device and method, it includes prestressed steel bundle;Supporting component, including vertical pole, horizontal rod;Positioning component, including distribution beam, support rod, positioning steel plate, well frame and connecting piece.Setting supporting component and positioning component, through the mutual cooperation of both, effectively solve the vertical curve bending dead angle when corrugated pipe installation in place in conventional prestress installation process, vertical prestressed steel bundle (S) is knotted and twisted mutually, vertical prestressed steel bundle (S) positioning deviation is big, it is time-consuming and labor-consuming, and the drawbacks such as low safety reliability, can effectively control the line shape of vertical prestress, reduce vertical prestressed steel bundle (S) positioning deviation, reduce prestress loss, and installation, dismounting is convenient, and structure is safe and reliable, and the advantages such as high rate of reuse.

Description

Technical Field

[0001] This invention relates to the technical field of prestressed construction of steel beam portal piers, and specifically to a vertical prestressing installation device and method for the interior of a steel beam portal pier. Background Technology

[0002] With the rapid establishment and development of transportation hubs in my country, single-level bridges can no longer meet urban traffic demands, leading to the development of multi-level elevated bridge designs. When new lines intersect with existing lines, the main girder span is often increased. However, when the intersection angle is small, increasing the main girder span increases the design and construction difficulty of the new bridge. Therefore, using portal piers can significantly reduce the span of bridges crossing existing lines, lower construction difficulty, and generate significant economic benefits.

[0003] Portal piers consist of columns and beams. Based on the column structure, they are classified into ordinary reinforced concrete structures and steel-concrete composite structures. The function of prestressed tendons is to elongate them after tensioning and anchor them in the concrete. The concrete prevents the prestressed tendons from freely retracting, creating an artificial stress state within the component before it bears the service load. This allows some of the principal tensile stress generated during the service stage to be offset by the prestress. Conventional prestressed installation has drawbacks such as vertical curve bends during corrugated pipe installation, tangling and twisting of steel strands, large positioning deviations of steel strands, high labor and time costs, and low safety and reliability. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the problems existing in the prior art, the present invention is proposed.

[0006] Therefore, the technical problem to be solved by the present invention is that the existing conventional prestressed installation process has drawbacks such as vertical curve bending dead angles when corrugated pipes are installed and positioned, mutual entanglement and twisting of steel strands, large positioning deviation of steel strands, labor-intensive and time-consuming process, and low safety and reliability.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a vertical prestressed installation device inside a steel beam portal pier, comprising prestressed steel strands; a support assembly, the support assembly comprising an upright and a horizontal bar, the upright and the horizontal bar being connected; and The positioning component, which is disposed on one side of the support component, includes a distribution beam, a support rod, a positioning steel plate, a grid frame, and a connector. The distribution beam is connected to a horizontal bar via the connector, the support rod is connected to one side of the distribution beam, the positioning steel plate is connected to one end of a vertical prestressed steel strand, and the grid frame is connected to the vertical prestressed steel strand.

[0008] As a preferred embodiment of the vertical prestressed installation device inside the steel beam portal pier described in this invention, the connecting component includes a connecting bolt, a U-shaped clip, and a flat sling. The flat sling is used to prevent the vertical prestressed steel strands from shifting downwards due to their own weight, thus deviating from the design position in the drawings. The connecting bolt and the U-shaped clip connect one side of the distribution beam to the horizontal bar.

[0009] As a preferred embodiment of the vertical prestressed installation device inside the steel beam portal pier described in this invention, the uprights and horizontal bars are connected by disc-type fasteners, the support assembly is provided with upper and lower channels as safe passages for the upper and lower pier columns, and the distribution beam provides a platform for fixing the vertical prestressed steel strands, transferring the self-weight of the vertical prestressed steel strands to the support frame.

[0010] As a preferred embodiment of the vertical prestressed installation device inside the steel beam portal pier described in this invention, the support rod supports the distribution beam through the upper U-shaped groove top support, and the support rod is supported on one side of the pier column reinforcement.

[0011] As a preferred embodiment of the vertical prestressed installation device inside the steel beam portal pier described in this invention, the positioning steel plate is fixed to the vertical prestressed steel strand by welding, the grid frame is welded to the prestressed steel strand and is evenly arranged according to the calculated spacing.

[0012] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a method for vertical prestressing installation inside a steel beam portal pier, comprising... Pour concrete foundation platform; Install support components; Binding the reinforcing steel bars of the pier column; Install positioning components; Lift the vertical prestressed steel strands (S) to the designated position; Install the grid frame and anchors, and pour concrete; Remove the support and positioning components.

[0013] As a preferred embodiment of the vertical prestressing installation method inside the steel beam portal pier described in this invention, the installation of the support components should be carried out after the concrete strength of the foundation platform reaches the design strength, and the height of the support components should exceed the top of the pier column, and the upper and lower passages should be installed simultaneously.

[0014] As a preferred embodiment of the vertical prestressing installation method inside the steel beam portal pier described in this invention, the method involves: after binding the prestressed steel strands, measuring and laying out the vertical prestressing anchorage position, installing a positioning steel plate below it, and welding and fixing it to the surrounding vertical prestressed steel strands to ensure that the bottom positioning steel plate of the steel strands is on the same horizontal line. The distribution beam is installed on one side of the support assembly to ensure that the distribution beam and the vertical prestress are in the same longitudinal section; The support rod is installed at the bottom of the distribution beam, and the distribution beam is located inside the groove of the top support rod.

[0015] As a preferred embodiment of the method for installing vertical prestressed steel beam portal piers described in this invention, before lifting the vertical prestressed steel strands (S), threaded steel is added inside to form lifting points to prevent the vertical prestressed steel strands (S) from slipping. During the lifting process, it is necessary to prevent the vertical curve bending dead angle of the vertical prestressed steel strands (S) from causing damage to the corrugated pipe. The prestressed steel strand is hoisted into the prestressed steel strand, with the lower fixed end positioned at the location of the fixed positioning steel plate, and the upper end tied to the distribution beam with a flat sling c, so that the entire vertical prestressed steel strand (S) is in a free-stretching state inside the steel cage.

[0016] As a preferred embodiment of the vertical prestressed installation method inside the steel beam portal pier described in this invention, the following steps are taken: when installing the grid frame, it is evenly arranged according to the corresponding calculated distance, and finally the anchor is installed to complete the concrete pouring of the pier column. The support components and positioning components can only be removed after the concrete strength reaches the design strength.

[0017] The beneficial effects of this invention are as follows: By setting up a support component and a positioning component, the two work together to effectively solve the problems of vertical curve bending dead angles, entanglement and twisting of vertical prestressed steel strands (S), large positioning deviation of vertical prestressed steel strands (S), high labor and time consumption, and low safety and reliability during the conventional prestressed installation process. It can effectively control the shape of the vertical prestress, reduce the positioning deviation of the vertical prestressed steel strands (S), reduce prestress loss, and has the advantages of convenient installation and disassembly, safe and reliable structure, and high reusability. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein: Figure 1 This is a schematic diagram of the overall device of the present invention.

[0019] Figure 2This is a schematic diagram of the nozzle component of the present invention.

[0020] Figure 3 This is an exploded schematic diagram of the nozzle component of the present invention. Detailed Implementation

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0023] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0024] Example 1 Reference Figure 1 , Figure 2 This is the first embodiment of the present invention, which provides a vertical prestressed installation device inside a steel beam portal pier, including prestressed steel strands D, a support component 100, and a positioning component 200.

[0025] Specifically, the support component 100 includes an upright 101 and a horizontal bar 102. The upright 101 and the horizontal bar 102 are made of seamless steel pipes and are connected by disc buckle fasteners. A hook-type steel ladder is used for the upper and lower passages and is fixed above the upper and lower horizontal bars 102. Furthermore, the positioning component 200 is located on one side of the support component 100, including a distribution beam 201, a support rod 202, a positioning steel plate 203, a grid frame 204, and a connector 205. The distribution beam 201 is made of I-beams and is fixedly connected to the horizontal bar 102 through the connector 205. The support rod 202 is made of seamless steel pipe with a top support and is connected to the bottom of the distribution beam 201. The positioning steel plate 203 is welded and fixed to the bottom end of the vertical prestressed steel strand S, and the grid frame 204 is welded and connected to the vertical prestressed steel strand S.

[0026] In summary, by cooperating with the support component 100, the positioning component 200 is used for positioning during the installation of vertical prestressed steel strands S, which solves the problems of the vertical prestressed steel strands (S) being entangled and twisted together and the large positioning deviation of the vertical prestressed steel strands (S), thereby shortening the construction period and increasing safety and reliability.

[0027] Example 2 Reference Figure 1 Figure 4 shows the second embodiment of the present invention, which is based on the previous embodiment.

[0028] Specifically, the connector 205 includes a connecting bolt 205a, a U-shaped clip 205b, and a flat sling 205c. The connecting bolt 205a and the U-shaped clip 205b connect the distribution beam 201 and the horizontal bar 102.

[0029] The uprights 101 and horizontal bars 102 are connected by disc-type fasteners, and the upper and lower passages are provided by hook-type steel ladders, providing workers with a safe passage to go up and down the piers.

[0030] The support rod 202 supports the distribution beam 201 through the upper U-shaped groove top support 202a, and the support rod 202 is supported on the top of the pier column reinforcement.

[0031] The positioning steel plate 203 is fixed to the vertical prestressed steel strand S by welding, and the grid frame 204 is welded to the vertical prestressed steel strand S and arranged evenly according to the calculated spacing.

[0032] In summary, the connector 205 connects the distribution beam 201 to the support assembly 100, providing a platform for fixing the vertical prestressed steel strands S. It transfers the self-weight of the vertical prestressed steel strands S to the support assembly 100 and is the main load-bearing component of the device. This ensures that the vertical prestressed steel strands S are fixed on the distribution beam 201 support system on the same axis, allowing the entire bundle of vertical prestressed steel strands (S) to be in a free-stretching state inside the steel cage, thus ensuring verticality.

[0033] Example 3 Reference Figure 1 This is the third embodiment of the present invention, which is based on the previous embodiment, but differs in that it provides a method for vertical prestressing installation inside a steel beam portal pier, including... Pour concrete foundation platform; Install support components 100; Binding the reinforcing steel bars of the pier column; Install positioning component 200; Lift the vertical prestressed steel strands (S) to the designated position; Install the 204 grid frame and anchorages, and pour concrete; Remove the support assembly 100 and the positioning assembly 200.

[0034] Specifically, first, a concrete foundation platform for the support structure is poured along the outer perimeter of the pier at the top of the backfill of the foundation pit. After the concrete strength reaches the design strength, the pier support component 100 is installed, with a height exceeding the top of the pier by one support step distance, and the hook-type steel ladder for the upper and lower passages is installed simultaneously.

[0035] Furthermore, the pier column reinforcement is tied, the anchorage position of the vertical prestressed steel strand S is measured and laid out, and the positioning steel plate 203 is installed below it and welded and fixed to the surrounding pier column reinforcement to ensure that the bottom positioning steel plate 203 of each steel strand is on the same horizontal line.

[0036] Furthermore, a distribution beam 201 is installed on top of the support assembly 100. The distribution beam 201 is in the same longitudinal section as the vertical prestressed steel strand S and is connected to the horizontal bar 102 by connecting bolts 205a.

[0037] Secondly, a support rod 202 is installed at the lower part of the distribution beam 201. The distribution beam 201 is located inside the top groove of the support rod 202, and the support rod 202 is supported above the steel reinforcement of the pier column skeleton.

[0038] The pre-threaded vertical prestressed steel strands (S) are lifted by a crane. At the lifting point, 32 threaded steel bars are added inside the vertical prestressed steel strands (S) to form the lifting point and prevent the vertical prestressed steel strands (S) from slipping. During the process, manual assistance is required to prevent the vertical curve of the vertical prestressed steel strands (S) from bending dead angles during the lifting process, which may cause damage to the corrugated pipe.

[0039] After all the vertical prestressed steel strands (S) are lifted, they are hoisted into the pier column reinforcement cage. The lower fixed end is located at the position of the fixed positioning steel plate 203, and the upper end is tied to the distribution beam with flat slings 205c. This ensures that the entire bundle of vertical prestressed steel strands (S) is in a free-stretching state inside the reinforcement cage, preventing vertical prestressing twisting that would not meet the design requirements for steel strands.

[0040] Install the grid frame 204 sequentially from the fixed end upwards, with one frame installed at certain intervals. Finally, install the anchorage to complete the concrete pouring of the pier column. Only after the concrete strength reaches the design strength can the support component 100 and some positioning components 200 be removed.

[0041] It should be noted that the 204 grid frame is not removed after it is poured and remains inside the concrete of the pier column.

[0042] Preferably, the positioning steel plate 203 can be made of 8mm thick steel plate, and the grid frame 204 is made of HRB400 steel bars, which are welded to the pier column steel bars and arranged every 50cm.

[0043] In summary, the vertical prestressing installation method inside the steel beam portal pier is superior to the traditional method in several aspects. During steel strand hoisting, 32mm threaded steel is added inside the vertical prestressed steel strands (S) to form hoisting points and prevent slippage. This also prevents damage to the corrugated pipe caused by the vertical curve bending dead angle of the vertical prestressed steel strands (S) during hoisting. In contrast, the traditional installation method involves direct hoisting, which easily leads to bending and damage at the bends of the corrugated pipe during hoisting. Furthermore, the traditional method of fixing the steel strands at an angle to the pier column is superior in several ways. On the main reinforcement, the vertical prestressed steel strands (S) are intertwined and twisted together. However, this method uses a distribution beam 201 support system fixed on the same axis, so that the entire bundle of vertical prestressed steel strands (S) is in a free extension state inside the steel cage, and the verticality is guaranteed. When positioning the steel strands, a grid reinforcement is installed every 50cm, and a positioning steel plate 203 is set in the anchoring section. The position of the steel strands is strictly designed according to the drawings to reduce prestress loss. In contrast, the vertical prestressed steel strands (S) of the traditional installation method are heavy and difficult to position according to the design position.

[0044] Meanwhile, the traditional method of directly binding the main reinforcement bars of the pier column results in eccentric load and poses a safety hazard. However, this method, through the support component 100 and positioning component 200, makes it safe and reliable, and also allows for convenient assembly and disassembly, saving construction costs.

[0045] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A vertical prestressing installation device inside a steel beam portal pier, characterized in that: include, Vertical prestressed steel strands (S); A support assembly (100) includes a vertical pole (101) and a horizontal pole (102), wherein the vertical pole (101) and the horizontal pole (102) are connected. as well as The positioning component (200) is disposed on one side of the support component (100) and includes a distribution beam (201), a support rod (202), a positioning steel plate (203), a grid frame (204), and a connector (205). The distribution beam (201) is connected to the horizontal rod (102) through the connector (205). The support rod (202) is connected to one side of the distribution beam (201). The positioning steel plate (203) is connected to one end of the vertical prestressed steel strand (S). The grid frame (204) is connected to the vertical prestressed steel strand (S).

2. The vertical prestressing installation device inside the steel beam portal pier as described in claim 1, characterized in that: The connector (205) includes a connecting bolt (205a), a U-shaped clip (205b), and a flat sling (205c). The flat sling (205c) is used to prevent the vertical prestressed steel strand (S) from shifting downward due to its own weight and deviating from the design position on the drawing. The flat sling (205c) connects the distribution beam (201) and the vertical prestressed steel strand (S). The connecting bolt (205a) and the U-shaped clip (205b) connect the distribution beam (201) and the horizontal bar (102).

3. The vertical prestressing installation device inside the steel beam portal pier as described in claim 1 or 2, characterized in that: The uprights (101) and horizontal bars (102) are connected by disc-type fasteners. The support assembly (100) is provided with upper and lower channels as safe passages for the upper and lower piers. The distribution beam (201) provides a platform for fixing the vertical prestressed steel strands (S) and transfers the self-weight of the vertical prestressed steel strands (S) to the support assembly (100).

4. The vertical prestressing installation device inside the steel beam portal pier as described in claim 3, characterized in that: The support rod (202) supports the distribution beam (201) through a U-shaped groove top support (202a) at one end, and the support rod (202) is supported on one side of the pier column reinforcement.

5. The vertical prestressing installation device inside the steel beam portal pier as described in claim 4, characterized in that: The positioning steel plate (203) is fixed to one end of the vertical prestressed steel strand (S) by welding. The grid frame (204) is welded to the vertical prestressed steel strand (S). The grid frame (204) positions the vertical prestressed steel strand (S) inside the pier body to ensure the verticality of the vertical prestressed steel strand (S), prevent it from lateral displacement, and arrange them evenly according to the calculated spacing.

6. A method for installing vertical prestressing inside a steel beam portal pier, characterized in that: Includes the internal vertical prestressing installation device for the steel beam portal pier as described in any one of claims 1 to 5; and, Pour concrete foundation platform; Mounting support components (100); Binding the reinforcing steel bars of the pier column; Install positioning components (200); Lift the vertical prestressed steel strands (S) to the designated position; Install the grid frame (204) and anchorages, and pour concrete; Remove the support assembly (100) and the positioning assembly (200).

7. The method for installing vertical prestressing inside a steel beam portal pier as described in claim 6, characterized in that: When installing the support component (100), it is necessary to wait until the concrete strength of the foundation platform reaches the design strength, and the height of the support component (100) exceeds the top of the pier column, and the hook-type steel ladder for the upper and lower passages is installed at the same time.

8. The method for installing vertical prestressing inside a steel beam portal pier as described in claim 7, characterized in that: After tying the pier column reinforcement, measure and lay out the anchorage position of the vertical prestressed steel strands (S), install the positioning steel plate (203) below it, and weld it to the surrounding pier column reinforcement to ensure that the bottom positioning steel plate (203) of each vertical prestressed steel strand (S) is on the same horizontal line. The distribution beam (201) is installed on one side of the support assembly (100) to ensure that the distribution beam (201) and the vertical prestressed steel strands (S) are in the same longitudinal section; The support rod (202) is installed at the lower part of the distribution beam, and the distribution beam (201) is located inside the top groove of the support rod (202).

9. The method for installing vertical prestressing inside a steel beam portal pier as described in claim 8, characterized in that: Before lifting the vertical prestressed steel strand (S), threaded steel bars are added inside to form lifting points to prevent the vertical prestressed steel strand (S) from slipping. During the lifting process, it is necessary to prevent the vertical curve of the vertical prestressed steel strand (S) from bending into dead angles, which could damage the corrugated pipe. The lower end of the prestressed steel strand (S) is fixed inside the pier column reinforcement. The upper end is tied to the distribution beam (201) with a flat sling (205c), so that the entire bundle of vertical prestressed steel strands (S) is in a free-stretching state inside the reinforcement cage.

10. The method for installing vertical prestressing inside a steel beam portal pier as described in claim 9, characterized in that: When installing the grid frame (204), arrange it evenly according to the corresponding calculated distance, and finally install the anchorage. After the concrete of the pier column is poured, the support components (100) and positioning components (200) can be removed after the concrete strength reaches the design strength.

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