Combined bracket for side span construction of cast-in-place beam

Abstract

The utility model discloses a combined bracket for cast-in-place beam side span construction, relates to the technical field of bridge continuous beam side span cast-in-place section construction, and solves the technical problems of large material consumption, slow construction progress, complex working procedures and higher cost in the existing continuous beam side span section construction by adopting a floor stand erecting method. Comprising a plurality of triangular supports. Each triangular support comprises a supporting bracket and a supporting bracket connected to the supporting bracket, and center hole jacks are arranged at the positions of the supporting brackets and the supporting brackets. The top of each supporting bracket is connected with an unloading block, and distribution beams are laid on the unloading blocks. According to the design, the pier column is used as a back pressure acting point, the jack is used for applying load, so that the side span beam is more stable during pouring, and the process is simple and easy to control. In addition, the bearing bracket and the bracket are welded and machined on the ground in advance and are transported to a site to be integrally hoisted, welding operation is avoided on the installation site, and the construction progress is fast.

Description

Technical Field

[0001] This utility model belongs to the field of construction technology of cast-in-place sections of continuous bridge beam side spans, and particularly relates to a combined bracket for construction of cast-in-place beam side spans. Background Technology

[0002] Continuous beam bridges are an important type of bridge structure, consisting of beam segments aligned with the supports on both sides, called end spans. In a continuous beam bridge, the span at the very end of each end of the continuous beam is called the end span, and the rest are called intermediate spans. End spans are typically located on either side of the bridge, adjacent to the intermediate span (the middle span of the bridge, or the largest span in an asymmetrically arranged bridge). In multi-span continuous beam bridges, there may be one or more end spans, the specific number depending on the total number of spans and their arrangement.

[0003] Currently, the construction of continuous beam side spans usually adopts the method of erecting ground-based scaffolding. Common ground-based scaffolding requires setting up a strip foundation on the ground to erect straight steel pipes, or using a foundation as a base to erect inclined steel pipes.

[0004] I. The specific plan for setting up a strip foundation with straight steel pipes is as follows: A. Construction of the strip foundation: The support foundation adopts an enlarged foundation to ensure that the concrete foundation can bear the load as a whole. The size, reinforcement configuration, and layout of the enlarged foundation need to be determined according to the specific design requirements and geological conditions. After the foundation construction is completed, curing and testing are required to ensure that it reaches the design strength.

[0005] B. Steel Pipe Column Support Installation: ① Hoisting and Fixing of Steel Pipe Columns: A crane is used to hoist the steel pipe columns to the predetermined positions, and flange connections, angle steel, and channel steel are used for horizontal and longitudinal support. During installation, the verticality and stability of the steel pipe columns must be ensured. ② Inspection of Steel Pipe Column Installation Quality: The centerline, top elevation, and verticality of the columns are inspected to ensure they meet design requirements.

[0006] C. Scaffold Preloading: After the scaffold is erected, a preloading test is required to verify the strength, stiffness, and stability of the scaffold. The preloading weight is usually 1.2 times the self-weight of the beam, with loading in stages and settlement observed.

[0007] II. The following is a scheme for constructing an inclined steel pipe support system using a foundation cap as the load-bearing structure:

[0008] A. Foundation Preparation: As the foundation load-bearing structure of the support system, the foundation must ensure that its dimensions, strength, and stability meet the design requirements. After the foundation construction is completed, curing and testing are required.

[0009] B. Erection of inclined steel pipe scaffolding:

[0010] ① Hoisting and fixing of steel pipe columns: Similar to straight steel pipe supports, a crane is used to hoist the steel pipe columns to the predetermined position. However, the steel pipe columns of inclined steel pipe supports need to be arranged at an angle to utilize the bearing platform as a support point.

[0011] ② Installation of horizontal supports and shear braces: Use angle steel, channel steel and other connectors to connect the steel pipe columns into a whole to form a stable support system.

[0012] C. Preloading and Adjustment: A preloading test is also required to verify the stability of the support structure. Based on the preloading results, the support structure is adjusted to ensure its stability during concrete pouring.

[0013] However, while both methods offer advantages in structural stability and safety, they also have some drawbacks. These mainly include high material consumption, slow construction progress due to the welding method used to connect the various components of the support structure, and, in particular, the method of erecting supports with straight steel pipes, which requires foundation treatment, involves complex procedures, and is costly. Therefore, to address these issues, we designed a combined support structure for the side span construction of cast-in-place beams. Utility Model Content

[0014] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a combined support frame for the construction of the side span of a cast-in-place beam. This combined support frame solves the technical problems of high material consumption, slow construction progress, complex procedures, and high cost associated with the existing method of erecting ground-based supports during the construction of the side span of continuous beams.

[0015] To achieve the above objectives, according to an embodiment of the first aspect of this utility model, a combined support frame for the construction of a cast-in-place beam side span is proposed, comprising multiple triangular supports, which are arranged side by side along the bridge direction at the side span piers;

[0016] Each of the triangular supports includes a supporting leg and a supporting bracket connected to the supporting leg, and a through-type jack is provided at the position of each supporting bracket and supporting leg;

[0017] Each of the support brackets is connected to an unloading block at its top, a distribution beam is laid above the unloading block, and a longitudinal beam is laid above the distribution beam.

[0018] A further improvement is that three sets of upper and lower embedded parts are connected to the side span pier.

[0019] A further improvement is that the sides of each of the supporting brackets are connected to the sides of the corresponding lower embedded parts by precision-rolled threaded steel bars.

[0020] A further improvement is that one end of the support bracket is connected to the side of the corresponding embedded part via a precision-rolled threaded steel bar.

[0021] A further improvement is that, after the through-hole jack is tensioned, the support bracket and the pier column of the side span pier form an integral whole.

[0022] A further improvement is that a backing plate is fitted onto the other end of each of the precision-rolled threaded steel bars.

[0023] A further improvement is that each of the aforementioned precision-rolled threaded steel bars is a precision-rolled threaded steel bar with a diameter of 32mm.

[0024] A further improvement is that the unloading blocks on each of the triangular supports are symmetrically distributed.

[0025] A further improvement is that each of the support brackets has a pair of connecting seats attached to its outer side.

[0026] A further improvement is that the spacing between each adjacent triangular support is equal.

[0027] Compared with the prior art, the beneficial effects of this utility model are:

[0028] This novel design utilizes piers as counter-pressure points and employs jacks to apply loads, resulting in greater stability during the pouring of the side span beams. The process is simple and easy to control. Furthermore, by pre-welding the load-bearing brackets and corbels on the ground, they can be transported to the site for overall hoisting, eliminating on-site welding work and accelerating construction. This design also reduces the amount of bracket material used, simplifies the structure, and allows for reuse after disassembly, effectively lowering construction costs. Attached Figure Description

[0029] Figure 1 This is a front view structural diagram of the present invention;

[0030] Figure 2 This is a side view structural diagram of the present invention.

[0031] Marked in the image:

[0032] 1. Support bracket; 2. Support bracket; 21. Connecting seat; 3. Unloading block; 4. Distribution beam; 5. Longitudinal beam; 6. Through-hole jack; 7. Upper embedded part; 8. Lower embedded part; 9. Precision rolled threaded steel bar; 10. Pad plate. Detailed Implementation

[0033] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0034] like Figure 1and Figure 2 As shown, a composite bracket for the construction of a cast-in-place beam side span includes multiple triangular brackets, which are installed at equal intervals along the bridge direction on the side span piers during installation.

[0035] Specifically, three sets of upper embedded parts 7 and lower embedded parts 8 are connected to the side span piers;

[0036] Each triangular bracket includes a supporting bracket 1 and a supporting bracket 2 connected to the supporting bracket 1. A through-type jack 6 is installed at the position of each supporting bracket 2 and supporting bracket 1. One end of the supporting bracket 2 is connected to the side of the corresponding embedded part 7 through a fine-rolled threaded steel bar 9. The other end of each fine-rolled threaded steel bar 9 is fitted with a pad 10, which is connected to the pier column of the side span pier. When the through-type jack 6 is fixed with a nut after the fine-rolled threaded steel bar 9 is tensioned, the supporting bracket 2 and the pier column of the side span pier form an integral whole.

[0037] Each supporting bracket 1 is connected to the side of the bridge by a precision rolled threaded steel bar 9 and the side of the corresponding lower embedded part 8. Before implementation, multiple reserved holes are pre-set on the pier body to run through the pier body in the direction of the bridge. Two precision rolled threaded steel bars 9 are inserted in each reserved hole. Each bracket and four tie rods are connected and tensioned to the pier body by nuts.

[0038] Each support bracket 2 is connected to a pair of symmetrically distributed unloading blocks 3 at its top. A distribution beam 4 is laid above the unloading blocks 3. Before implementation, a longitudinal beam 5 is laid above the distribution beam 4.

[0039] Specifically, as a preferred embodiment, each support bracket 2 has a pair of connecting seats 21 connected to the outer side of the diagonal bar for installing the side connecting rod, thereby enhancing structural stability.

[0040] like Figures 1 to 2 As shown in this embodiment, it should also be noted that during implementation, the device can be removed using a crane or tower crane and moved to the next construction site for installation. The specification of the precision-rolled threaded steel bar 9 is 32mm in diameter. The actual dimensions of each component in the application document will be selected for installation based on actual site requirements. Additionally, it should be noted that this application document only addresses the shortcomings of existing continuous beam side span construction methods, such as high material consumption, slow construction progress, complex procedures, and high costs associated with erecting ground-based supports, and does not cover other aspects. The working principle of this cast-in-place beam side span construction combined bracket is described below:

[0041] The construction bracket for the side span of the cast-in-place beam designed in this utility model involves installing multiple triangular brackets in parallel along the bridge direction on the side span pier. Each triangular bracket specifically includes a support bracket 1 and a support bracket 2. The side of each support bracket 1 is connected to the side of the corresponding lower embedded part 8 through a fine-rolled threaded steel bar 9. One end of the support bracket 2 is connected to the side of the corresponding upper embedded part 7 through a fine-rolled threaded steel bar 9, thus completing the connection with the side span pier.

[0042] After each triangular bracket is installed, the threaded steel tie rod is tensioned by using a hollow jack on the other side of the triangular bracket. A load-bearing block 3 is installed on the top of the load-bearing beam on the side of the cast-in-place beam of the pier, and a distribution beam 4 is erected transversely. A cast-in-place beam formwork is then erected on the distribution beam 4, completing the overall assembly of the combined bracket. This utility model, adopting the above design, features stability, simple procedures, and low material consumption. It eliminates welding work on-site, accelerates construction progress, and ensures construction safety and quality.

[0043] The above embodiments are only used to illustrate the technical methods of this utility model and are not intended to limit it. Although this utility model 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 methods of this utility model without departing from the spirit and scope of the technical methods of this utility model.

Claims

1. A composite bracket for the construction of the side span of a cast-in-place beam, characterized in that, This includes multiple triangular supports that are equidistantly arranged in parallel along the bridge direction on the side span piers; Each of the triangular supports includes a supporting leg (1) and a supporting bracket (2) connected to the supporting leg (1), and a through-type jack (6) is provided at the position of each supporting bracket (2) and supporting leg (1). Each of the support brackets (2) is connected to a top unloading block (3), a distribution beam (4) is laid above the unloading block (3), and a longitudinal beam (5) is laid above the distribution beam (4).

2. The combined support frame for the side span construction of a cast-in-place beam according to claim 1, characterized in that, The side span pier is connected to three sets of upper embedded parts (7) and lower embedded parts (8).

3. The combined support for the construction of the side span of a cast-in-place beam according to claim 2, characterized in that, The sides of each of the supporting brackets (1) are connected by precision-rolled threaded steel bars (9) and the sides of the corresponding lower embedded parts (8).

4. The combined support for the construction of the side span of a cast-in-place beam according to claim 2, characterized in that, One end of the support bracket (2) is connected to the side of the corresponding embedded part (7) via a finely rolled threaded steel bar (9).

5. The combined support for the construction of the side span of a cast-in-place beam according to claim 1, characterized in that, After the through-hole jack (6) is tensioned, the support bracket (2) and the pier column of the side span pier form an integral whole.

6. The combined support for the construction of the side span of a cast-in-place beam according to claim 3, characterized in that, Each of the fine-rolled threaded steel bars (9) has a pad (10) fitted at the other end.

7. A combined support frame for the construction of the side span of a cast-in-place beam according to claim 3, characterized in that, Each of the aforementioned fine-rolled threaded steel bars (9) is a fine-rolled threaded steel bar (9) with a diameter of 32 mm.

8. The combined support for the construction of the side span of a cast-in-place beam according to claim 1, characterized in that, The unloading blocks (3) on each of the triangular supports are symmetrically distributed.

9. A combined support frame for the construction of the side span of a cast-in-place beam according to claim 1, characterized in that, Each of the support brackets (2) has a pair of connecting seats (21) connected to its outer side.

10. A combined support frame for the construction of the side span of a cast-in-place beam according to claim 1, characterized in that, The spacing between each adjacent triangular support is equal.

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