Precast channel-shaped concrete pier structure and construction method thereof

Abstract

The application discloses a prefabricated slot-shaped concrete pier structure and a construction method thereof, and belongs to the field of bridge construction technology. The structure comprises a pier main body, a cap beam and a bearing platform which are arranged at the top end and the bottom end of the pier main body respectively, and the top end and the bottom end of the pier main body are connected with the cap beam and the bearing platform through connecting pieces. The construction method comprises the following steps: step one, block prefabrication of flange plates and mid-plates in a prefabrication factory; step two, smearing of an adhesive layer on both ends of the mid-plate, on-site assembly of the flange plates and the mid-plate; step three, tensioning of connecting steel bars, so that the flange plates and the mid-plate are connected to form a whole pier main body; and step four, hoisting of the pier main body and realization of the connection with the cap beam and the bearing platform through the connecting pieces. The application can save the total material consumption of the pier; and the application of the application makes the weight of each component very small, and facilitates the prefabrication, transportation and hoisting of the components.

Description

Technical Field

[0001] This invention relates to the field of bridge pier construction, and more particularly to a precast trough-shaped concrete bridge pier structure and its construction method. Background Technology

[0002] In existing technologies, bridge pier structures are typically solid structures such as rectangles or circles. However, based on the principles of material conservation and green construction, large-sized bridge pier structures are sometimes made into hollow structures.

[0003] However, the fabrication and demolding of hollow bridge pier structures are quite troublesome, especially when the structural dimensions are small.

[0004] Meanwhile, considering the heavy weight of the existing bridge piers, transportation and hoisting are quite difficult.

[0005] Therefore, how to optimize the pier structure, save pier materials, and facilitate the prefabrication, transportation, and hoisting of components has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of the above-mentioned deficiencies of the prior art, the technical objective of the present invention is to solve the problems mentioned in the background art.

[0007] To achieve the above technical objectives, the present invention provides a precast trough-shaped concrete bridge pier structure, including a bridge pier body, wherein a cap beam and a bearing platform are respectively provided at the top and bottom of the bridge pier body, and the top and bottom of the bridge pier body are respectively connected to the cap beam and the bearing platform through connectors.

[0008] The main body of the bridge pier includes a flange plate and a central diaphragm plate. The flange plate is provided with vertical main reinforcing bars and stirrups. The central diaphragm plate is provided with ordinary reinforcing bars and connecting reinforcing bars. The connecting reinforcing bars extend out of the end of the central diaphragm plate.

[0009] The flange plate includes an upper flange plate and a lower flange plate. An adhesive layer is provided at the joint between the upper flange plate, the lower flange plate and the middle partition plate. The upper flange plate and the lower flange plate are respectively provided with connection holes corresponding to the positions of the connecting steel bars.

[0010] Preferably, the connector is any one of the following: grouting sleeve, metal corrugated pipe, slot-type connector, socket connector, high-strength concrete, and flange.

[0011] Preferably, the upper flange, the lower flange, and the middle partition form a groove or an I-shape in cross-section.

[0012] Preferably, the connecting steel bar passes through the upper flange plate and the lower flange plate.

[0013] Preferably, the adhesive layer is an adhesive or a padding mortar.

[0014] Another construction method for precast trough-shaped concrete bridge pier structures is provided, including the following steps:

[0015] Step 1: Prefabricate the flange plates and central partition plates in sections at the prefabrication plant;

[0016] Step 2: Apply adhesive to both ends of the partition plate and assemble the flange plate and partition plate on site.

[0017] Step 3: Tension the connecting steel bars to connect the flange plate and the central diaphragm plate to form a whole pier body;

[0018] Step 4: Hoist the main body of the bridge pier and use connectors to connect it to the cap beam and the abutment.

[0019] The beneficial effects of this invention are:

[0020] (1) This invention can save the total amount of materials used for bridge piers.

[0021] (2) The application of the present invention makes each component very lightweight and facilitates the prefabrication, transportation and hoisting of components. Attached Figure Description

[0022] Figure 1 This is a frontal structural diagram of the present invention;

[0023] Figure 2 This is a side view of the structure of the present invention;

[0024] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure at point AA;

[0025] Figure 4 for Figure 1 Schematic diagram of the cross-sectional structure at point BB;

[0026] Figure 5 for Figure 1 Schematic diagram of the cross-sectional structure at point CC;

[0027] Figure 6 This is a schematic diagram of the segmented prefabricated flange plate and the central partition plate of the present invention;

[0028] Figure 7 This is a schematic diagram illustrating the process of applying epoxy adhesive to both ends of the partition plate and assembling the flange plate as the partition plate on-site according to the present invention.

[0029] Figure 8 This is a schematic diagram illustrating how the tensioning and connecting of steel bars in this invention connects the bridge piers to form a single unit.

[0030] Figure 9This is a schematic diagram illustrating the hoisting of the bridge pier and the connection to the abutment and cap beam using a connecting joint, according to the present invention.

[0031] In the diagram: 1. Pier main body, 2. Cap beam, 3. Pier cap, 4. Flange plate, 5. Central diaphragm, 6. Connector, 7. Stirrup, 8. Ordinary steel bar, 9. Connecting steel bar, 10. Bonding layer, 11. Connecting hole. Detailed Implementation

[0032] The following will further explain the concept, specific structure, and technical effects of the present invention in conjunction with the accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention.

[0033] Example:

[0034] like Figures 1-5 As shown, a precast trough-shaped concrete bridge pier structure includes a bridge pier body 1, with a cap beam 2 and a bearing platform 3 respectively provided at the top and bottom ends of the bridge pier body 1. The top and bottom ends of the bridge pier body 1 are connected to the cap beam 2 and the bearing platform 3 respectively through connectors 6.

[0035] The main body of the pier 1 includes a flange plate 4 and a central diaphragm plate 5. Vertical main reinforcing bars and stirrups 7 are arranged in the flange plate 4 according to the stress requirements. Ordinary steel bars 8 and connecting steel bars 9 are provided in the central diaphragm plate 5. The connecting steel bars 9 extend out of the plate end of the central diaphragm plate 5.

[0036] The flange plate 4 includes an upper flange plate and a lower flange plate. An adhesive layer 10 is provided at the joint between the upper flange plate, the lower flange plate and the middle partition plate 5. A connection hole 11 corresponding to the position of the connecting steel bar 9 is reserved in the upper flange plate and the lower flange plate respectively.

[0037] Specifically, connector 6 can adopt connection structures such as grouting sleeve, metal corrugated pipe, slot type connector, socket connector, high-strength concrete and flange.

[0038] The connecting steel bar 9 passes through the upper flange plate and the lower flange plate and provides pre-tension force to make the pier body 1 form a whole. The connecting steel bar 9 can be high-strength fine-threaded steel bar, HRB600 steel bar or FRP bar, etc. After the upper flange plate, lower flange plate and middle diaphragm 5 are assembled, the connecting steel bar 9 needs to be tensioned so that the three can form a whole.

[0039] Specifically, the upper flange, lower flange, and middle diaphragm 5 form a groove or I-shape in the cross-section.

[0040] Specifically, the adhesive layer 10 is an adhesive or a padding mortar.

[0041] The working principle of this invention is as follows: the main body 1 of the bridge pier is mostly an eccentrically compressed component. In the reinforced concrete bridge pier, according to the stress characteristics of the main body 1 of the bridge pier, the diaphragm 5 is arranged on the side with greater pressure. At the same time, a sufficient number of stirrups 7, ordinary steel bars 8 and connecting steel bars 9 are arranged in the upper flange plate and the lower flange plate so that the steel bars can withstand the tensile force. In this way, even if the main body 1 of the bridge pier is missing a piece of concrete compared with an ordinary solid bridge pier, it will not significantly affect the overall stress of the main body 1 of the bridge pier.

[0042] like Figures 6-9 As shown, a construction method for a precast trough-shaped concrete bridge pier structure includes the following steps:

[0043] Step 1: Prefabricate the flange 4 and the central diaphragm 5 in sections at the prefabrication plant;

[0044] Step 2: Apply adhesive layer 10 to both ends of the partition plate 5, and assemble the flange plate 4 and the partition plate 5 on site.

[0045] Step 3: Tension the connecting steel bars 9 to connect the flange plate 4 and the central diaphragm plate 5 to form an integral pier body 1;

[0046] Step 4: Hoist the main body of the bridge pier 1 and use the connector 6 to connect it with the cap beam 2 and the pier cap 3.

[0047] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A precast trough-shaped concrete bridge pier structure, comprising a pier body, characterized in that, The top and bottom of the main body of the bridge pier are respectively provided with a cap beam and a bearing platform, and the top and bottom of the main body of the bridge pier are respectively connected to the cap beam and the bearing platform through connectors; The main body of the bridge pier includes a flange plate and a central diaphragm plate. The flange plate is provided with vertical main reinforcing bars and stirrups. The central diaphragm plate is provided with ordinary reinforcing bars and connecting reinforcing bars. The connecting reinforcing bars extend out of the end of the central diaphragm plate. The flange plate includes an upper flange plate and a lower flange plate. An adhesive layer is provided at the joint between the upper flange plate, the lower flange plate and the middle partition plate. The upper flange plate and the lower flange plate are respectively provided with connection holes corresponding to the positions of the connecting steel bars. The upper flange, the lower flange, and the middle partition form a groove or I-shape in the cross-section; The connecting steel bar passes through the upper flange plate and the lower flange plate.

2. The precast trough-shaped concrete bridge pier structure according to claim 1, characterized in that, The connector is any one of the following: grouting sleeve, metal corrugated pipe, slot-type connector, socket connector, high-strength concrete, and flange.

3. The precast trough-shaped concrete bridge pier structure according to claim 1, characterized in that, The adhesive layer is an adhesive or a padding mortar.

4. The construction method for the precast trough-shaped concrete bridge pier structure according to claim 1, characterized in that, Includes the following steps: Step 1: Prefabricate the flange plates and central partition plates in sections at the prefabrication plant; Step 2: Apply adhesive to both ends of the partition plate and assemble the flange plate and partition plate on site. Step 3: Tension the connecting steel bars to connect the flange plate and the central diaphragm plate to form a whole pier body; Step 4: Hoist the main body of the bridge pier and use connectors to connect it to the cap beam and the abutment.

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