Concrete beam 0 block pier side support self-balancing multi-point counter-pressure device

Abstract

The utility model relates to a kind of concrete beam 0 block pier side support self-balancing multi-point counter-pressure device, comprising: anchoring beam, jack, bearing beam, distribution beam, cushion beam component, finish rolling screw steel anchoring component, support;The anchoring beam is set in device top;The jack is set between anchoring beam and dead load beam, and pre-pressure is provided for distribution beam by the oil pressure control of jack;The distribution beam is horizontally arranged below bearing beam;The cushion beam component is arranged below distribution beam according to 0 block load distribution law, so that distribution beam is horizontal;The finish rolling screw steel anchoring component is penetrated bearing beam and is anchored in bridge pier interior;The support is located beside bridge pier, and it is located below the cushion beam component.Compared with prior art, the utility model has the advantages of improving construction safety, reducing engineering quantity and the like.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction, and in particular to a self-balancing multi-point counter-pressure device for the support of the No. 0 block of a concrete beam next to the pier. Background Technology

[0002] Prestressed concrete continuous beam bridges are a common type of bridge structure. The No. 0 block of a concrete continuous beam bridge requires the use of scaffolding for construction. To verify the safety of the scaffolding structure, it needs to be pre-stressed before pouring the No. 0 block. When the bridge span is large, the weight of the No. 0 block concrete is extremely high, making the pre-stressing construction using traditional surcharge methods extremely difficult.

[0003] Patent CN201921885120.9 discloses a pre-stressing reaction frame for a pier-side bracket. Two rows of embedded reinforcing bars are installed along the bridge direction on the pier cap, directly opposite the pre-stressing zone on each bracket. Multiple pad beams are installed transversely on the top surface of the cap. A reaction beam is installed on the top surface of each pad beam, corresponding to each row of embedded reinforcing bars. The upper end of each embedded reinforcing bar passes through the reaction beam and is screwed with a nut to tighten it. Prestressed steel strands are installed between the bracket and the reaction beam. The lower end of each prestressed steel strand is anchored to the bottom surface of the reaction beam, and the upper end passes through the center of the pre-stressing zone on the bracket, connected to a tension jack on the top surface of the bracket. This invention uses a jack to apply the pre-stressing load to the bracket, allowing for precise control of the loading data. This more realistically simulates the actual stress effect of the pier-side bracket and eliminates the inelastic deformation of the bracket structure. However, the synchronous control of the jack requires high precision; the pre-stressing zone must be pre-divided according to the design load, and flexible adjustment is not possible.

[0004] Patent CN202010463428.5 discloses a reaction force preloading system and method for the support of the 0# block of an ultra-high cantilever beam. It includes steel pipe supports erected on the bearing platforms on both sides of the pier. A bottom formwork is provided on the top of the steel pipe supports and the pier. Multiple distribution beams are evenly arranged along the transverse length of the bridge at the upper end of the bottom formwork. Each distribution beam has three sets of jacks evenly arranged along the length of the bridge. Each set of jacks is topped with a Bailey truss that runs along the transverse length of the bridge. Multiple precision-rolled threaded steel bars are pre-embedded at the top of each pier. The precision-rolled threaded steel bars pass through the Bailey truss and are constrained between the jacks and the constraining components at the top of the Bailey truss. The jacks are electrically connected to an intelligent tensioning electromechanical system. However, the graded loading procedure is cumbersome, and the precision of the pre-embedded precision-rolled threaded steel bars is high.

[0005] Patent CN201620582039.3 discloses a novel prestressing device for the support of the zero section and cast-in-place section of a continuous beam bridge, including a pier cap, precision-rolled threaded steel bars, piers, steel pipe columns, precision-rolled threaded steel bar connectors, precision-rolled threaded steel bars, support crossbeams, longitudinal distribution beams, Bailey bridge reaction frames, steel reaction beams, through-hole hydraulic jacks, upper top pad beams, lower reaction nuts, and upper nuts. Specifically, precision-rolled threaded steel bars, construction piers, and steel pipe columns are pre-embedded within the pier cap; crossbeams are installed on top of the steel pipes, and longitudinal distribution beams are laid; the precision-rolled threaded steel bars are connected to the top of the support via precision-rolled threaded steel bar connectors; Bailey bridge reaction frames are installed on the longitudinal distribution beams, and steel reaction beams are laid; the lower reaction nut is at the bottom; the through-hole hydraulic jacks are inserted into the precision-rolled threaded steel bars and placed on the steel reaction beams; and a top pad beam and upper nut are installed on top. However, synchronous control is difficult, and the pre-embedded positions are limited. Utility Model Content

[0006] The purpose of this utility model is to overcome the defects of the existing technology and provide a self-balancing multi-point counter-pressure device for the support of the No. 0 block of a concrete beam, which can improve construction safety and reduce the amount of work.

[0007] The objective of this utility model can be achieved through the following technical solutions:

[0008] To address the pre-stressing construction of the support structure next to pier No. 0, this utility model achieves safe and efficient pre-stressing of the support structure next to pier No. 0.

[0009] This utility model provides a self-balancing multi-point counter-pressure device for the support of the No. 0 block pier of a concrete beam, including: anchor beam, jack, bearing beam, distribution beam, pad beam assembly, fine-rolled threaded steel anchor assembly, and support.

[0010] The anchoring beam is located at the top of the device;

[0011] The jacks are positioned between the anchor beam and the dead load beam, and the preload is provided to the distribution beam through hydraulic control of the jacks.

[0012] The distribution beam is horizontally arranged below the load-bearing beam;

[0013] The pad beam assembly is arranged below the distribution beam according to the load distribution law of block 0, so that the distribution beam is horizontal;

[0014] The precision-rolled threaded steel anchoring assembly penetrates the load-bearing beam and is anchored inside the pier;

[0015] The support is located next to the bridge pier and below the pad beam assembly.

[0016] Furthermore, the pad beam assembly includes:

[0017] Wedge-shaped pads are placed on the support to accommodate the slope of the top surface of the support;

[0018] A leveling pad is placed above the wedge-shaped pad for height adjustment.

[0019] A bearing pad beam is used for load transfer.

[0020] Furthermore, the wedge-shaped pad and the pressure-bearing beam are fixedly connected, and the leveling pad and the pressure-bearing beam are also fixedly connected.

[0021] Furthermore, the precision-rolled threaded steel anchoring assembly includes:

[0022] Fine-rolled threaded steel bars, penetrating the load-bearing beam;

[0023] An embedded sleeve is fixed inside the bridge pier and sleeved on the outside of the finely rolled threaded steel bar;

[0024] Anchor plates are used to transfer anchoring forces to the interior of the pier. They prevent tensile stress from being generated on the pier surface, thus improving the pier's crack resistance.

[0025] Furthermore, the finely rolled threaded steel bar is anchored to the anchoring beam, the finely rolled threaded steel bar is anchored to the anchoring plate, and the anchoring plate is installed and aligned with the pre-embedded sleeve.

[0026] Furthermore, the pad beam assembly is set at multiple points and arranged according to the load distribution pattern of block 0 to simulate the load distribution of block 0.

[0027] Furthermore, the piers and supports are all located on the pier platform.

[0028] Furthermore, a support pad is provided between the distribution beam and the load-bearing beam.

[0029] Furthermore, the spacing of the pad beam assembly is determined based on the bending moment distribution curve of block 0.

[0030] Furthermore, the precision-rolled threaded steel anchoring assembly is provided with multiple components.

[0031] Compared with the prior art, the present invention has the following advantages:

[0032] (1) Improved construction safety. The utility model makes full use of the bearing capacity of the pier itself to provide preload reaction force, and uses multi-point arrangement of pad beams to simulate the load distribution of block 0, which can more accurately simulate the distribution of construction load. By using the precision-rolled threaded steel anchoring components to form a closed force system with the pier, the reaction force is entirely provided by the bearing capacity of the pier itself, without the need for external counterweights, thus solving the problem of pier crack resistance and further improving construction safety.

[0033] (2) Reduce the workload. The jack (2) synchronous control realizes one-click loading, without the need for material transfer, and without the need for temporary structures such as special reaction frames in the traditional stacking method.

[0034] (3) It can adapt to various working conditions. The pad beam components are arranged according to the load distribution law of block 0 to simulate the load distribution of block 0. Attached Figure Description

[0035] Figure 1 A schematic diagram of the self-balancing multi-point counter-pressure device for the support next to the pier of the No. 0 block of the concrete beam;

[0036] Figure 2 This is a schematic diagram of the structure of a precision-rolled threaded steel anchoring assembly;

[0037] Figure 3 This is a structural schematic diagram of the pad beam assembly;

[0038] Attached reference numerals: 1. Anchor beam; 2. Jack; 3. Bearing beam; 4. Distribution beam; 5. Pad beam assembly; 6. Support pad; 7. Fine-rolled threaded steel anchor assembly; 8. Pier; 9. Abutment; 10. Support; 5-1. Leveling pad; 5-2. Bearing pad beam; 5-3. Wedge pad; 7-1. Fine-rolled threaded steel bar; 7-2. Embedded sleeve; 7-3. Anchor plate. Detailed Implementation

[0039] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Component models, material names, connection structures, control methods, algorithms, and other features not explicitly described in this technical solution are considered common technical features disclosed in the prior art.

[0040] Example 1

[0041] This utility model provides a self-balancing multi-point counter-pressure device for the support of the No. 0 block pier of a concrete beam, such as... Figure 1-3 As shown, it includes: anchor beam 1, jack 2, bearing beam 3, distribution beam 4, pad beam assembly 5, fine-rolled threaded steel anchor assembly 7, and bracket 10;

[0042] The anchoring beam 1 is installed at the top of the device;

[0043] The jack 2 is installed between the anchor beam 1 and the constant load beam 3. The hydraulic pressure of the jack 2 is controlled to provide preload to the distribution beam 4.

[0044] The distribution beam 4 is horizontally arranged below the load-bearing beam 3;

[0045] The pad beam assembly 5 is arranged below the distribution beam 4 according to the load distribution law of block 0, so that the distribution beam 4 is horizontal.

[0046] The precision-rolled threaded steel anchoring assembly 7 penetrates the load-bearing beam 3 and is anchored inside the pier 8;

[0047] The bracket 10 is located next to the pier 8 and below the pad beam assembly 5.

[0048] Example 2

[0049] This utility model provides a self-balancing multi-point counter-pressure device for the support of the No. 0 block pier of a concrete beam, such as... Figure 1-3 As shown, it includes: anchor beam 1, jack 2, bearing beam 3, distribution beam 4, pad beam assembly 5, fine-rolled threaded steel anchor assembly 7, and bracket 10;

[0050] The anchoring beam 1 is installed at the top of the device;

[0051] The jack 2 is installed between the anchor beam 1 and the constant load beam 3. The hydraulic pressure of the jack 2 is controlled to provide preload to the distribution beam 4.

[0052] The distribution beam 4 is horizontally arranged below the load-bearing beam 3;

[0053] The pad beam assembly 5 is arranged below the distribution beam 4 according to the load distribution law of block 0, so that the distribution beam 4 is horizontal.

[0054] The precision-rolled threaded steel anchoring assembly 7 penetrates the load-bearing beam 3 and is anchored inside the pier 8;

[0055] The bracket 10 is located next to the pier 8 and below the pad beam assembly 5.

[0056] In a specific embodiment, the pad beam assembly 5 includes:

[0057] Wedge-shaped pads 5-3 are provided on the bracket 10 to accommodate the slope of the top surface of the bracket 10;

[0058] Leveling pad 5-1 is placed above wedge-shaped pad 5-3 for height adjustment;

[0059] The bearing pad beam 5-2 is used for load transfer.

[0060] In a specific embodiment, the wedge-shaped pad 5-3 and the pressure-bearing pad beam 5-2 are spot-welded together, and the leveling pad 5-1 and the pressure-bearing pad beam 5-2 are spot-welded together.

[0061] In a specific embodiment, the precision-rolled threaded steel anchoring assembly 7 includes:

[0062] 7-1 fine-rolled threaded steel bars, penetrating load-bearing beam 3;

[0063] The pre-embedded sleeve 7-2 is embedded in the pier 8 and sleeved on the outside of the finely rolled threaded steel bar 7-1;

[0064] Anchor plate 7-3 is used to transfer the anchoring force to the interior of pier 8. No tensile stress is generated on the surface of pier 8, which improves the crack resistance of pier 8.

[0065] In a specific implementation, the finely rolled threaded steel bar 7-1 is anchored to the anchoring beam 1, the finely rolled threaded steel bar 7-1 is anchored to the anchoring plate 7-3, and the anchoring plate 7-3 is installed and aligned with the pre-embedded sleeve 7-2.

[0066] In a specific implementation, the pad beam assembly 5 is set at multiple points and arranged according to the load distribution pattern of block 0 to simulate the load distribution of block 0.

[0067] In a specific implementation, the pier 8 and the support 10 are both located on the pier cap 9.

[0068] In a specific embodiment, a support pad 6 is provided between the distribution beam 4 and the load-bearing beam 3.

[0069] In a specific implementation, the spacing of the pad beam assembly 5 is determined according to the bending moment distribution curve of block 0.

[0070] In a specific embodiment, the precision-rolled threaded steel anchoring assembly 7 is provided with multiple components.

[0071] Components not described in detail in this embodiment are all existing components that can be purchased through public channels.

[0072] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.

Claims

1. A self-balancing multi-point counter-pressure device for the support of the No. 0 block pier of a concrete beam, characterized in that, include: Anchor beam (1), jack (2), bearing beam (3), distribution beam (4), pad beam assembly (5), fine-rolled threaded steel anchor assembly (7), bracket (10); The anchoring beam (1) is located at the top of the device; The jack (2) is set between the anchor beam (1) and the constant load beam (3), and the hydraulic pressure of the jack (2) provides preload to the distribution beam (4); The distribution beam (4) is horizontally arranged below the load-bearing beam (3); The pad beam assembly (5) is arranged below the distribution beam (4) according to the load distribution law of block 0, so that the distribution beam (4) is horizontal; The precision-rolled threaded steel anchoring assembly (7) penetrates the load-bearing beam (3) and is anchored inside the pier (8); The bracket (10) is located next to the pier (8) and below the pad beam assembly (5).

2. The self-balancing multi-point counter-pressure device for the support of the No. 0 block pier of a concrete beam according to claim 1, characterized in that, The pad beam assembly (5) includes: Wedge-shaped pads (5-3) are provided on the bracket (10) to accommodate the slope of the top surface of the bracket (10); The leveling pad (5-1) is placed above the wedge-shaped pad (5-3) for height adjustment; The bearing pad beam (5-2) is used for load transfer.

3. The self-balancing multi-point counter-pressure device for the support of the No. 0 block pier of a concrete beam according to claim 2, characterized in that, The wedge-shaped pad (5-3) and the pressure-bearing pad beam (5-2) are fixedly connected, and the leveling pad (5-1) and the pressure-bearing pad beam (5-2) are fixedly connected.

4. The self-balancing multi-point counter-pressure device for the support of the No. 0 block pier of a concrete beam according to claim 1, characterized in that, The precision-rolled threaded steel anchoring assembly (7) includes: Fine-rolled threaded steel bars (7-1) penetrate the load-bearing beam (3); An embedded sleeve (7-2) is embedded in the pier (8) and sleeved on the outside of the finely rolled threaded steel bar (7-1); Anchor plate (7-3) is used to transfer the anchoring force to the inside of the pier (8).

5. The self-balancing multi-point counter-pressure device for the support of the No. 0 block pier of a concrete beam according to claim 4, characterized in that, The finely rolled threaded steel bar (7-1) is anchored to the anchor beam (1), the finely rolled threaded steel bar (7-1) is anchored to the anchor plate (7-3), and the anchor plate (7-3) is installed and aligned with the pre-embedded sleeve (7-2).

6. The self-balancing multi-point counter-pressure device for the support of the No. 0 block pier of a concrete beam according to claim 1, characterized in that, The pad beam assembly (5) is set at multiple points and arranged according to the load distribution law of block 0 to simulate the load distribution of block 0.

7. The self-balancing multi-point counter-pressure device for the support of the No. 0 block pier of a concrete beam according to claim 1, characterized in that, The piers (8) and supports (10) are both located on the pier cap (9).

8. The self-balancing multi-point counter-pressure device for the support of the No. 0 block pier of a concrete beam according to claim 1, characterized in that, A support pad (6) is provided between the distribution beam (4) and the load-bearing beam (3).

9. The self-balancing multi-point counter-pressure device for the support of the No. 0 block pier of a concrete beam according to claim 1, characterized in that, The spacing of the pad beam assembly (5) is determined according to the bending moment distribution curve of block 0.

10. The self-balancing multi-point counter-pressure device for the support of the No. 0 block pier of a concrete beam according to claim 1, characterized in that, The precision-rolled threaded steel anchoring assembly (7) is provided in multiple forms.

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