A Y-shaped bridge pier swivel construction method

Abstract

The application relates to the field of bridge construction, in particular to a Y-shaped bridge pier swivel construction method.The Y-shaped bridge pier swivel construction method comprises the following steps: constructing a pier column; setting a pier limb formwork and connecting the pier limb formwork to the pier column through a rotating piece; setting a supporting device to make the pier limb formwork be in a pouring position; pouring concrete to the pier limb formwork to form a pier limb; making the pier limb rotate around the rotating piece to a design position; removing the pier limb formwork, setting a connecting formwork between the pier limb and the pier column, and pouring concrete; removing the connecting formwork and the supporting device, and completing the construction.The application provides a Y-shaped bridge pier swivel construction method to solve the problems that the installation steps of the formwork at the junction of the pier limb are complicated, and the inclined pier column is difficult to pour and vibrate in the related art.

Description

Technical Field

[0001] This application relates to the field of bridge construction, and in particular to a method for constructing Y-shaped bridge piers by rotation. Background Technology

[0002] Bridge piers are located in the middle of a bridge and are structures used to support the superstructure of two adjacent spans. Due to their smaller construction area, Y-shaped piers are quite common in bridge engineering.

[0003] In related technologies, when traditional bridge "V" or "Y" shaped piers are constructed using cast-in-place technology, the in-situ support method is usually adopted.

[0004] However, the fact that these bridge piers are separated into two inclined sections makes construction extremely difficult: First, it is difficult to set up the casting support and formwork for the inclined pier, especially the formwork at the junction of the bottom of the pier sections, which is complicated to manufacture and install, and the stress is complex and the concrete is prone to cracking; Second, the bridge piers are generally equipped with prestressed tendons, but their installation is very difficult and often requires the installation of a special stiffening frame; Third, it is very difficult to pour and vibrate the concrete when casting the inclined pier. Summary of the Invention

[0005] This application provides a method for constructing Y-shaped bridge piers by rotating them, in order to solve the problems in related technologies where the formwork fabrication and installation steps at the junction of pier limbs are cumbersome, and the pouring and vibration of inclined pier columns are difficult.

[0006] To achieve the above objectives, this application provides a method for constructing a Y-shaped bridge pier by rotation, which includes the following steps:

[0007] Construction piers;

[0008] Set up the pier formwork and connect it to the pier column via a rotating component;

[0009] Install support devices to position the pier formwork in the pouring position;

[0010] Concrete is poured into the formwork of the pier to form the pier.

[0011] Rotate the pier arm around the rotating component to the designed position;

[0012] Remove the pier formwork, install connecting formwork between the pier and the column, and pour concrete.

[0013] Remove the connecting formwork and the supporting devices to complete the construction.

[0014] In some embodiments, the construction of the pier includes the following steps:

[0015] An mounting surface is provided on the pier, and the rotating component is pre-embedded on the mounting surface.

[0016] In some embodiments, providing a support device to position the pier formwork in the pouring position includes:

[0017] One end of the support device is fixed to the ground, and the other end is connected to the two piers at opposite ends.

[0018] In some embodiments, the support device includes a strut and a hydraulic component, the strut being connected to the hydraulic component for driving the strut to extend or retract, and the strut being positioned on the side of the two piers that are far apart from each other.

[0019] In some embodiments, the support device includes:

[0020] A supporting foundation is set on the ground, so that one end of the strut is rotatably connected to the supporting foundation.

[0021] In some embodiments, the support device includes a lifting bracket disposed on the side of the pier leg;

[0022] Rotating the pier leg around the rotating member to the designed position includes:

[0023] A jacking device is installed on the pier column, and the jacking device is connected to the jacking bracket;

[0024] The jacking device pushes the corbel away from the pier column, and the hydraulic components drive the strut to retract, so that the pier reaches the designed position.

[0025] In some embodiments, before pouring concrete into the pier formwork to form the pier, the following steps are also included:

[0026] Tie members are installed on the opposite side of the two pier formworks.

[0027] In some embodiments, the tie rod is adjustable in length, and the tie rod is parallel to the ground and connected to the end of the pier formwork away from the pier column.

[0028] In some embodiments, the rotating member includes a first hinge seat and a second hinge seat that are hinged to each other;

[0029] The following steps are also included when constructing the pier columns and pier formwork:

[0030] A second hinge seat is provided on the mounting surface of the pier column, and a first hinge seat is provided at the end of the pier formwork facing the pier column, with at least a portion of the first hinge seat located in the cast pier.

[0031] In some embodiments, setting a connecting formwork between the pier and the column and pouring concrete includes the following steps:

[0032] Connecting formwork is installed between the pier leg and the pier column, and reinforcing bars are tied;

[0033] Concrete is poured into the connecting template to embed the rotating component in the concrete, and the prestressing tendons of the pier are tensioned and grouted.

[0034] The beneficial effects of the technical solution provided in this application include:

[0035] This application provides a Y-shaped bridge pier rotation construction method. During the pouring of the pier, the pier formwork is in the pouring position, and the support device supports the pier formwork to keep it vertical. There is no need to add additional pouring supports and formwork, which also facilitates the pouring and vibration of concrete. After the pier concrete reaches a certain strength, the pier is rotated around the rotating component to the designed position. Specifically, the two piers tilt in opposite directions, and the support device provides support for the pier, ensuring that the rotation process of the pier is stable and the posture is controllable, thus rotating the pier from the pouring position to the designed tilt position.

[0036] After removing the pier formwork, a connecting formwork is installed between the pier column and the pier segment, i.e. at the rotating part. Concrete is poured into it to connect the pier segment and the pier column, forming a Y-shaped bridge pier. Therefore, it can solve the problems in related technologies where the formwork fabrication and installation steps at the pier segment junction are cumbersome, and the pouring and vibration of the inclined pier column are difficult. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 An elevation view of the pier formwork in the pouring position in the construction method provided in the embodiments of this application;

[0039] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0040] Figure 3 An elevation view of the pier formwork in the designed position in the construction method provided in the embodiments of this application.

[0041] In the diagram: 1. Pier column; 11. Mounting surface; 12. Pier column plane; 2. Pier leg; 21. Lifting bracket; 3. Support device; 31. Strut; 32. Support foundation; 4. Rotating component; 41. First hinge seat; 42. Second hinge seat; 5. Jacking device; 6. Tie rod; 7. Pier cap. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0043] This application provides a method for constructing a Y-shaped pier structure by rotation, which can solve the problems in related technologies, such as the cumbersome steps of formwork fabrication and installation at the junction of pier limbs and the difficulty of pouring and vibrating inclined pier columns during the construction of Y-shaped bridge piers.

[0044] See Figures 1 to 3 As shown in the figure, this application provides a method for constructing a Y-shaped pier structure by rotation, which includes the following steps:

[0045] S1, Construction Pier 1.

[0046] Specifically, the construction of pier 1 includes the following steps:

[0047] S101. An mounting surface 11 is provided on the pier 1, and a rotating component 4 is pre-embedded in the mounting surface 11. The rotating component 4 is used to connect with the pier leg 2, so that the pier leg 2 can rotate relative to the mounting surface 11 around the rotating component 4. Specifically, before setting the pier 1, a foundation 7 is pre-set underground, and the pier 1 is set on the foundation 7.

[0048] Optionally, the mounting surface 11 is an inclined surface, and the inclined direction of the mounting surface 11 is preferably perpendicular to the length direction of the corresponding connected pier 2 when it is installed in place, which can effectively avoid interference between the pier 2 and the mounting surface 11 of the pier column 1 during the rotation process.

[0049] Optionally, the rotating element 4 includes a hinge.

[0050] S2. Set the pier formwork and connect the pier formwork to the pier column 1 through the rotating part 4.

[0051] Specifically, a pier template is installed at the location where the pier 2 should be installed, and the installed pier template is connected to the mounting surface 11 of the pier column 1 through a rotating part 4. The end of the pier template away from the pier column 1 is not sealed, and is used for pouring concrete to form the pier 2.

[0052] Optionally, such as Figure 2As shown, the rotating component 4 includes a first hinge seat 41 and a second hinge seat 42. The first hinge seat 41 is disposed on the pier limb 2, or the first hinge seat 41 is disposed on the pier limb template, and the second hinge seat 42 is disposed on the first mounting surface 11 of the pier column 1. The first hinge seat 41 and the second hinge seat 42 are hinged to realize the relative rotation between the pier limb 2 or the pier limb template and the pier column 1.

[0053] S3. Set up support device 3 to position the pier formwork in the pouring position.

[0054] See Figure 1 As shown, Figure 1 This is a schematic diagram of the pier formwork in the pouring position. One end of the support device 3 is fixed to the ground, and the other end is connected to the ends of the two piers 2 that are far apart from each other, leaving space for the piers 2 to rotate and adjust to the designed position later. The angle α between the pier formwork and the horizontal plane (ground) is 90°, that is, the pier formwork is in a vertical state, which is to facilitate the pouring and vibration of concrete. Of course, it can be offset slightly, but the error should not exceed 3°.

[0055] Optionally, see Figures 1 to 3 As shown, the support device 3 includes a strut 31 and a hydraulic component. The strut 31 is connected to the hydraulic component, which is used to drive the strut 31 to extend and retract. Figure 1 The diagram shows the support rod 31 for pier 2 or pier formwork in the pouring position. When pier 2 or pier formwork needs to be rotated... Figure 3 When the design position is shown, the strut 31 is retracted by the hydraulic components, which drives the pier 2 to reach the position shown. Figure 3 The design position is shown; after reaching the design position, the strut 31 can also support the pier 2 or the pier formwork, so that the pier 2 or the pier formwork will not fall back.

[0056] Optionally, strut 31 as Figure 1 As shown, the support rod 31 is located on the side of the two piers 2 that are far apart from each other, and is rotatably connected to the pier 2, which can pull the pier 2 to rotate and at the same time provide strong support for the pier 2.

[0057] Optionally, the support device 3 also includes a support base 32, which can be set on the ground to support the strut 31, with one end of the strut 31 rotatably connected to the support base 32.

[0058] In some alternative embodiments, see Figures 1 to 3 As shown, the pier 1 includes a pier plane 12, and the support device 3 includes a lifting bracket 21 disposed on the side of the pier limb 2, and the lifting bracket 21 is disposed on the pier plane 12.

[0059] Furthermore, a jacking device 5 is installed on the pier column 1. When the pier formwork is in such a position... Figure 1When the jacking device 5 is in the pouring position shown, it is connected to the jacking bracket 21; when the support rod 31 is retracted by the hydraulic components, the jacking device 5 simultaneously pushes the jacking bracket 21 away from the end of the pier 1, and in conjunction with the process of the hydraulic components driving the support rod 31 to retract, the pier 2 reaches the designed position. Optionally, the jacking device 5 is a jack or a hydraulic cylinder.

[0060] S4. Pour concrete into the formwork of the pier to form pier 2.

[0061] Specifically, at this time the pier formwork is in the position as follows: Figure 1 The pouring location shown makes it easier to pour concrete and facilitates vibration.

[0062] S5. Rotate the pier 2 around the rotating component 4 to the designed position.

[0063] Specifically, after the concrete of pier 2 in the pier formwork reaches the design strength, the jacking device 5 is activated to jack up the corbel 21. Simultaneously, the hydraulic components control the support rod 31 to retract in sync with the oil return, causing the two piers to slowly rotate and tilt to the desired position. Figure 3 The design position shown is to ensure the safety of the initial rotation of pier 2. Specifically, the angle α between pier 2 and the horizontal plane (ground) is less than 90°.

[0064] S6. Remove the pier formwork, install a connecting formwork between pier 2 and pier column 1, and pour concrete.

[0065] Specifically, the position of the folded-to-connecting template is the installation position of the rotating part 4, the purpose of which is to connect and fix the pier limb 2 to the pier column 1.

[0066] Furthermore, the rotating member 4 includes a first hinge seat 41 and a second hinge seat 42 that are hinged to each other, wherein the combination Figure 2 As shown, a second hinge seat 42 is provided on the mounting surface 11 of the pier column 1, and a first hinge seat 41 is provided at one end of the pier limb template facing the pier column 1, and at least a portion of the first hinge seat 41 is located in the cast pier limb 2.

[0067] After setting up the connecting template, by pouring concrete into it, a part of the first hinge seat 41 can be located in the pier 2 that has been poured in the previous step, and another part can be located in the newly poured concrete of the connecting template, which can strengthen the connection strength between the concrete at the connecting template and the pier 2.

[0068] Similarly, at least a portion of the second hinge seat 42 can be pre-embedded in the pier column 1, so that a portion of the second hinge seat 42 is located in the pier column 1 and the other portion is located in the newly poured concrete of the formwork, thereby strengthening the connection strength between the concrete at the formwork and the pier column 1.

[0069] Optionally, setting a connecting formwork between pier 2 and pier column 1 and pouring concrete includes the following steps:

[0070] S601. Set up a connecting formwork between pier 2 and pier column 1, and tie the reinforcing bars;

[0071] S602. Pour concrete into the connecting template to embed the rotating part 4 in the concrete, tension the prestressed tendons of the pier limb 2 and press grout.

[0072] Specifically, tying the reinforcing bars involves tensioning the prestressed tendons at the connection between pier limb 2 and pier column 1, and simultaneously grouting. Since the amount of concrete to be poured for the part of the pier limb 2 and pier column 1 where the support formwork is set is smaller than the amount of concrete for pier limb 2, grouting is simpler than for the inclined pier limb 2, even though the connection formwork is inclined.

[0073] S7. Remove the connecting template and the supporting device 3 to complete the construction.

[0074] Specifically, after the concrete at the connection template reaches a certain strength, the connection template is removed, and the support device 3 is removed after a period of time to complete the construction of the pier 2.

[0075] In some optional embodiments, the following steps are included before step S4:

[0076] Tie members 6 are installed on the opposite side of the two pier formworks.

[0077] Specifically, in combination Figure 1 and Figure 3 As shown, the tie member 6 is set at one end of the two piers 2 facing each other, and the length of the tie member 6 is adjustable and parallel to the horizontal plane (ground), always keeping it in a taut state, providing opposing tension to the two piers 2 or pier templates.

[0078] Optionally, the tie member 6 includes a pin rope, and the pin rope is inelastic. After the pier 2 is poured, it needs to be removed from the tie rod. Figure 1 The pouring position was rotated to Figure 3 When the design position is shown, as the two piers 2 rotate and move away from each other, the length of the toe rope also increases, improving the safety of the pier 2 rotation process.

[0079] This application provides a Y-shaped bridge pier rotation construction method. During the pouring of the pier leg 2, the pier leg formwork is in the pouring position, and the preferred pouring position is... Figure 1The vertical state is shown (the angle α between the pier formwork and the horizontal plane is 90°). Simultaneously, the support device 3 supports the pier formwork, keeping it vertical, eliminating the need for additional pouring supports and formwork, and facilitating concrete placement and vibration. After the concrete of pier 2 reaches a certain strength, pier 2 is rotated around the rotating component 4 to the designed position. Specifically, the two piers 2 tilt away from each other, while the support device 3 provides support for pier 2, ensuring the stability and controllable posture of pier 2 during rotation. Pier 2 is then moved from... Figure 1 Rotate to the indicated pouring position Figure 3 The design location is shown;

[0080] After removing the pier formwork, a connecting formwork is set between pier column 1 and pier 2, i.e. at the rotating part 4. Concrete is poured into it to connect pier 2 and pier column 1, forming a Y-shaped bridge pier. Therefore, it can solve the problems in related technologies where the formwork fabrication and installation steps at the pier junction are cumbersome, and the pouring and vibration of inclined pier columns are difficult.

[0081] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0082] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0083] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for constructing a Y-shaped pier structure by rotation, characterized in that, It includes the following steps: Construction pier (1); Set up the pier formwork and connect the pier formwork to the pier column (1) through the rotating part (4); Set up a support device (3) to place the pier formwork in the pouring position and keep the pier formwork vertical; Concrete is poured into the pier formwork to form the pier (2); Rotate the pier (2) around the rotating member (4) to the designed position; Remove the formwork of the pier leg, set up a connecting formwork between the pier leg (2) and the pier column (1), and pour concrete; Remove the connecting template and the supporting device (3) to complete the construction.

2. The construction method for rotating a Y-shaped pier structure as described in claim 1, characterized in that, The construction of the pier (1) includes the following steps: An mounting surface (11) is provided on the pier (1), and the rotating part (4) is pre-embedded on the mounting surface (11).

3. The construction method for rotating a Y-shaped pier structure as described in claim 1, characterized in that, Setting up a support device (3) to position the pier formwork in the pouring position includes: One end of the support device (3) is fixed to the ground, and the other end is connected to the two piers (2) at opposite ends.

4. The construction method for rotating a Y-shaped pier structure as described in claim 3, characterized in that: The support device (3) includes a strut (31) and a hydraulic component. The strut (31) is connected to the hydraulic component, which is used to drive the strut (31) to extend and retract. The strut (31) is located on the side of the two piers (2) that are far apart from each other.

5. The method for constructing a Y-shaped pier structure by rotation as described in claim 4, characterized in that, The support device (3) includes: A support base (32) is set on the ground so that one end of the strut (31) is rotatably connected to the support base (32).

6. The construction method for rotating a Y-shaped pier structure as described in claim 4, characterized in that: The support device (3) includes a lifting bracket (21) disposed on the side of the pier (2); Rotating the pier (2) around the rotating member (4) to the designed position includes: A jacking device (5) is installed on the pier (1) so that the jacking device (5) is connected to the jacking bracket (21); The jacking device (5) pushes the jacking bracket (21) away from the pier (1), and the hydraulic component drives the support rod (31) to retract, so that the pier (2) reaches the designed position.

7. The construction method for rotating a Y-shaped pier structure as described in claim 1, characterized in that, Before pouring concrete into the pier formwork to form pier (2), the following steps are also included: Tie members (6) are installed on the opposite side of the two pier formworks.

8. The construction method for rotating a Y-shaped pier structure as described in claim 7, characterized in that: The length of the tie rod (6) is adjustable, and the tie rod (6) is parallel to the ground and connected to the end of the pier template away from the pier column (1).

9. The construction method for rotating a Y-shaped pier structure as described in claim 1, characterized in that: The rotating component (4) includes a first hinge seat (41) and a second hinge seat (42) that are hinged to each other. The following steps are also included in the construction of the pier column (1) and the pier formwork: A second hinge seat (42) is provided on the mounting surface of the pier (1), and a first hinge seat (41) is provided at one end of the pier formwork facing the pier (1), and at least a part of the first hinge seat (41) is located in the cast pier (2).

10. The construction method for rotating a Y-shaped pier structure as described in claim 1, characterized in that, The steps for setting up a connecting formwork between the pier (2) and the pier column (1) and pouring concrete include: A connecting template is set between the pier leg (2) and the pier column (1), and reinforcing bars are tied; Concrete is poured into the connecting template so that the rotating part (4) is embedded in the concrete, and the prestressed tendons of the pier (2) are tensioned and grouted.

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