A portal pier construction support swivel system

Abstract

This case relates to a portal pier construction support rotation system, including a pre-constructed central pier and side piers, a turntable set on the top of the central pier, and a support erected on the top of the turntable parallel to the existing road direction. The support rotates relative to the turntable, and the distance between the two sides of the turntable is the same. When the support rotates to face the side piers, the support can cover both side piers. The work is completed at the position on the central pier, that is, the work is carried out in the superstructure area of ​​the bridge, without the need for long-term road closure or the installation of a large number of ground support structures, thus minimizing the impact on existing traffic flow.

Description

Technical Field

[0001] This application relates to the field of bridge construction technology, specifically to the field of a portal pier construction support rotation system. Background Technology

[0002] With the continuous development of urban transportation networks, bridge construction often involves crossing existing infrastructure, especially when bridges are built across major urban traffic arteries. Minimizing the impact on existing traffic flow has become a key factor.

[0003] However, although the traditional cast-in-place method using supports can meet the structural strength and technical requirements for portal pier construction, it has a great impact on traffic under the bridge, requiring long-term road closures, which brings great inconvenience and risks to urban traffic.

[0004] In particular, it crosses two different existing roads, as shown in the attached document. Figure 1 The construction of the portal piers has a more severe impact on road traffic because there are existing roads between the central pier and the two side piers. Summary of the Invention

[0005] In response to the above-mentioned needs, this application proposes a portal pier construction support rotation system. Through the rotation design of the construction support, it aims to complete the construction of the portal pier crossbeam with minimal impact on the existing traffic on both sides of the pier, as described above.

[0006] To achieve the above objectives, the present application adopts the following technical solution:

[0007] A portal pier construction support rotation system includes a pre-constructed central pier and side piers, a turntable set on the top of the central pier, and a support erected on the top of the turntable parallel to the existing road direction.

[0008] The bracket rotates relative to the turntable, and the distance between the two sides of the turntable is the same. When the bracket rotates to the side pier orientation, the bracket can cover both side piers.

[0009] In this way, by completing the work on the central pier, that is, in the superstructure area of ​​the bridge, there is no need to close the road for a long time or set up a large number of ground support structures, thus minimizing the impact on existing traffic flow.

[0010] Meanwhile, the supports on both sides of the turntable are equidistant, allowing the turntable to rotate under its own weight and effectively cover the side piers, thus enabling the construction of the pier beams on both sides to be completed with a single manufacturing of the supports.

[0011] In some possible implementations, the formwork and reinforcing bars are also installed at the bottom of the support before the support is rotated. In this way, the formwork and reinforcing bars can be installed directly on the support, and the concrete can be poured directly after the support is rotated to the side pier.

[0012] In some possible implementations, the template is mounted at the bottom of the support via a suspension system.

[0013] In some possible implementations, a crane is also included that can lift beam segments and assemble them into pier beams.

[0014] In some possible implementations, the crane is mounted on the side of the support extending beyond the side pier.

[0015] In some possible implementations, the support structure includes spaced-apart main beams, with the overhead crane mounted across the top of the main beams.

[0016] In some possible implementations, the support also includes a support beam that is hoisted to the installation position by a crossbeam segment and rotated 90° to change the hoisting point.

[0017] In some possible implementations, a support pad is provided between the bracket and the side pier.

[0018] In some possible implementations, the system also includes formwork and reinforcing bars mounted on the upper end of the support. Cast-in-place construction can then be carried out directly on the upper end of the support.

[0019] In some possible implementations, the bracket is provided with a stop in its rotational direction. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the portal pier after the completion of construction as per this application;

[0021] Figures 2 to 9 This is a schematic diagram of the construction process of cast-in-place support rotation in Embodiment 1 of the support rotation system of this application;

[0022] Figures 10 to 19 This is a schematic diagram of the process of rotating a segmented assembled support during construction, as described in Embodiment 2 of the support rotation system of this application.

[0023] Figures 20 to 22 This is a schematic diagram of the construction process of the support rotation system embodiment 3 of this application using the support pre-installed template;

[0024] Figure 23 This is a flowchart illustrating Embodiment 1 of the stent rotation system of this application;

[0025] Figure 24 This is a flowchart illustrating Embodiment 2 of the stent rotation system of this application. Detailed Implementation

[0026] The following examples further illustrate the features of this application and other related features in detail, so as to facilitate understanding by those skilled in the art:

[0027] It should be noted that the terms “front,” “back,” “left,” “right,” “up,” and “down” used in the following description refer to the directions in the attached diagrams, while the terms “bottom surface,” “top surface,” “inner,” and “outer” refer to the directions toward or away from the geometric center of a specific component, respectively.

[0028] Furthermore, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this case based on the specific circumstances.

[0029] Please refer to Figure 1 This is a schematic diagram of the portal pier after construction as described in this application. The portal piers involved in this application mainly include the central pier 110 and the two side piers 120. The pier beam 200 to be constructed is the main structure to be built. The difficulty of this construction lies in the fact that the construction section will have existing roads 300, such as existing viaducts, which have traffic requirements. The conventional construction method is to set up supports at the bottom of the pier beam 200 before constructing the pier beam 200. This requires supporting temporary piers on the existing road 300, which means that the existing road 300 needs to be closed. This has a significant impact on traffic, requiring a long-term road closure and causing traffic inconvenience.

[0030] In response, this application proposes a portal pier construction support rotation system that utilizes the characteristic of constructing the middle pier 110 and side piers 120 first. A support is pre-installed on the top of the middle pier 110, and the support direction can be parallel to the existing road 300. This part of the work can be completed using the space on top of the middle pier 110 between the two existing roads 300 without affecting traffic. If the existing road 300 is an elevated bridge, the construction space is even more convenient for operation.

[0031] Example 1.

[0032] Please refer to Figures 2 to 9 This embodiment describes the construction process of a portal pier construction support rotation system, employing a suspended formwork and cast-in-place beam method. The portal pier construction support rotation system of this application includes a pre-constructed central pier 110 and side piers 120. An existing road 300, primarily an elevated bridge, connects the central pier 110 and the two side piers 120. The central pier 110 and side piers 120 mentioned above refer to the pier body; the terms "central pier" and "side pier" are used to distinguish their positional relationship.

[0033] Furthermore, a turntable 1 is provided on the top of the pier 110. The turntable 1 is fixed to the top of the pier and allows its load to rotate. A support 2 is provided on the top of the turntable 1. The support 2 is parallel to the direction of the existing road 300. That is, the construction of the support 2 on the pier 110 can avoid the top of the existing road 300 and does not affect its passage.

[0034] Specifically, the support 2 rotates relative to the turntable 1, with the distance between the supports 2 on both sides of the turntable 1 being the same, meaning the support 2 is bisected at both ends by the turntable 1. Simultaneously, when the support 2 rotates to the direction of the side pier 120, it can cover both side piers 120. Thus, with the support 2 on both sides of the turntable 1 being equidistant, the rotation can be completed by its own weight, effectively covering the side piers 120, allowing the construction of the crossbeams 200 of both piers to be completed in a single manufacturing of the support 2.

[0035] Furthermore, in this embodiment, before the support 2 rotates, a template 3 and reinforcing bars (not marked in the figure) are installed at the bottom of the support 2. Using template 3 and pre-set reinforcing bars to create the crossbeam is a common industry practice, and will not be elaborated upon here. Thus, template 3 and reinforcing bars can be directly installed on the support 2, allowing it to rotate to the side pier 120mm and then proceed with cast-in-place construction.

[0036] It should be noted that in this embodiment, the support 2 covers the top of the side pier 120, meaning the pier beam 200 is located between the side piers 120. The support 2 has a stable structure supported by the middle pier 110 and the side piers 120. The template 3 is installed at the bottom of the support 2 by being hoisted from it using a suspension system 4. Preferably, a support pad 5 is provided between the support 2 and the side pier 120.

[0037] The following combination Figure 23 The construction process flowchart is provided for further explanation, and the specific construction steps are as follows:

[0038] Step S11: Please refer to Figure 2 Pier construction, installation of rotating parts on the top of the middle pier 110, 1, the pier body refers to the middle pier 110 and the side pier 120;

[0039] Step S12: Please refer to Figure 3 1. A support frame 2 is erected along the existing road 300 direction at the central pier 110, and steel bars and formwork 3 are installed;

[0040] Step S13: Please refer to Figure 4 The support frame 2 is rotated to the construction position, and the two side piers 120 support blocks 5 are placed on them;

[0041] Step S14: Please refer to Figure 5 3. Lifting the formwork and pouring concrete for the crossbeam;

[0042] Step S15: Please refer to Figure 6 Demolding and separating the bottom film;

[0043] Step S16: Please refer to Figure 7 The end small piece of bottom membrane 41 is lowered to the ground, and the bottom formwork suspension system 4 is slid to both sides for removal. This process is repeated, with each section sliding to remove the bottom membrane 41 and its suspension system 4.

[0044] Step S17: Please refer to Figure 8 Remove the 120 support pads from both sides of the pier;

[0045] Step S18: Rotate support 2 horizontally to a position where the middle pier 110 is parallel to the existing road 300, remove support 2 and turntable 1, and repair the top part of the middle pier 110.

[0046] Example 2.

[0047] Please refer to Figures 10 to 19 This embodiment describes the construction process of a portal pier construction support rotation system, which uses a crossbeam segment assembly method. In Embodiment Two, the descriptions of the same parts including the turntable 1 and the support 2 will not be repeated.

[0048] After the support frame 2 rotates to the side pier 120 and is in place, there will be a portion extending beyond the outer side of the side pier 120. At this position, the overhead crane 6 is installed. The overhead crane 6 is used to hoist the crossbeam segment 210 and assemble it into the pier crossbeam 200.

[0049] Specifically, in this design, support 2 is also supported by the central pier 110 and the side pier 120, with support pads 5 provided between support 2 and the side pier 120. Support 2 includes a main support beam 21 and a crossbeam 22. The main support beam 21 consists of parallel beams spaced apart, and the overhead crane 6 is installed across the top of the main support beam 21. When hoisting the crossbeam segment 210, it is positioned between the parallel beams of the main support beam 21. After being hoisted to the installation position, it is rotated 90° and the hoisting point is changed to the crossbeam 22.

[0050] The following combination Figure 24 The construction process flowchart is provided for further explanation, and the specific construction steps are as follows:

[0051] Step S21: Reference Figure 10 Pier construction, installation of turntable 1 on the top of pier 110 in the middle pier;

[0052] Step S22: Reference Figure 11 The central pier 110 is erected along the existing road 300 direction to construct the assembly support 2 for the crossbeam segment 210;

[0053] Step S23: Reference Figure 12The support 2 is rotated to the construction position, the main beam 21 of the support is moved to the design position, and the side piers 120 are filled with pads 5 for support.

[0054] Step S24: Reference Figure 13 Install 6 overhead cranes and hoist 210 crossbeam segments;

[0055] Step S25: Reference Figure 14 The 210 crossbeam segment was lifted to a position above the top of the pier;

[0056] Step S26: Reference Figure 15 The overhead crane 6 hoisted the crossbeam segment 210 to the position above the installation location, and then lowered the crossbeam segment 210 to the bottom of the main beam 21 of the support.

[0057] Step S27: Reference Figure 16 The crossbeam segment 210 is rotated 90° and the lifting point is changed, and it is suspended by the support crossbeam 22;

[0058] Step S28: Reference Figure 17 Assemble the crossbeam segments section by section, 210;

[0059] Step S29: Reference Figure 18 Remove the pier body crossbeam suspension system;

[0060] Step S30: Reference Figure 19 Remove the overhead crane 6, and move and rotate the main beam 21 of the support frame.

[0061] Example 3.

[0062] In this embodiment, the differences from those in Embodiments 1 and 2 will not be described in detail. Please refer to... Figures 20 to 22 In this embodiment, a scheme is adopted to pre-set the template 3 and steel bars on the upper end of the support 2, so that the cast-in-place construction can be carried out directly on the upper end of the support 2.

[0063] In this scheme, the template 3 covers the top of the middle pier 110 and the side pier 120. At this time, the support 2 is provided with a retaining edge 21 in its rotation direction. The retaining edge 21 covers the side pier 120 from the side, so that the support 2 and the side pier 120 can be stably fixed. At this time, the support 2 is supported by the supporting bracket 7 set inside the side pier 120.

[0064] As stated above, this case protects a portal pier construction support rotation system, and all technical solutions that are the same as or similar to this case should be considered to fall within the scope of protection of this case.

Claims

1. A portal pier construction support rotation system, characterized in that, It includes a pre-constructed central pier (110) and side piers (120), a turntable (1) set on the top of the central pier (110), and a support (2) erected on the top of the turntable (1) in a direction parallel to the existing road (300). The bracket (2) rotates relative to the turntable (1), and the distance between the two sides of the turntable (1) is the same. When the bracket (2) rotates to the side pier (120) facing, the bracket (2) can cover both side piers (120).

2. The portal pier construction support rotation system as described in claim 1, characterized in that, It also includes a template (3) and reinforcing bars that are placed at the bottom of the support (2) before the support (2) rotates.

3. The portal pier construction support rotation system as described in claim 2, characterized in that, The template (3) is installed at the bottom of the bracket (2) by a suspension system (4).

4. The portal pier construction support rotation system as described in claim 1, characterized in that, It also includes a crane (6) that can lift beam segments (210) and assemble them into pier beams (200).

5. The portal pier construction support rotation system as described in claim 4, characterized in that, The overhead crane (6) is installed on the side of the support (2) that extends beyond the side pier (120).

6. The portal pier construction support rotation system as described in claim 4, characterized in that, The support (2) includes a support main beam (21) spaced apart, and the overhead crane (6) is installed across the top of the support main beam (21).

7. The portal pier construction support rotation system as described in claim 6, characterized in that, The bracket (2) also includes a bracket beam (22) in which a crossbeam segment (210) is hoisted to the installation position and rotated 90° to change the hoisting point.

8. A portal pier construction support rotation system as described in any one of claims 1 to 7, characterized in that, A support pad (5) is provided between the bracket (2) and the side pier (120).

9. The portal pier construction support rotation system as described in claim 1, characterized in that, It also includes a template (3) and reinforcing bars set on the upper end of the support (2).

10. The portal pier construction support rotation system as described in claim 9, characterized in that, The bracket (2) is provided with a retaining edge (21) in its rotational direction.

Images