A guiding plate structure with a UHPC dovetail mortise and tenon component and a construction method

Abstract

The present invention relates to a guide plate structure with a UHPC dovetail tenon and mortise assembly and a construction method, which includes a first guide plate and a second guide plate. The first guide plate and the second guide plate are connected by a tenon and mortise assembly. The tenon and mortise assembly includes a first connecting member and a second connecting member that are hooked together. The first connecting member is provided with a dovetail-shaped first tenon and a first mortise. The second connecting member is provided with a dovetail-shaped second mortise and a second tenon that respectively cooperate with the first tenon and the first mortise of the first connecting member. An inner compression material layer is clamped between the first tenon and the second tenon; an outer compression material layer is clamped between the end face of the first tenon and the side face of the second mortise and between the end face of the second tenon and the side face of the first mortise; a sliding material layer is provided between the bottom surface of the first mortise and the top surface of the second tenon and between the bottom surface of the second mortise and the top surface of the first tenon; the longitudinal displacement of the seamless bridge main beam caused by temperature change is absorbed and transmitted, thereby avoiding cracks in the asphalt pavement.

Description

Technical Field

[0001] The present invention relates to the field of seamless bridges, and in particular to a guiding plate structure with a UHPC dovetail tenon and mortise component and a construction method therefor. Background Art

[0002] For a seamless joint bridge (hereinafter referred to as a seamless bridge), connecting steel bars are provided to connect the bridge and the guiding plate. In a seamless bridge, multiple guiding plates (multi-section guiding plates) and multiple expansion joint plates are often arranged in series along the longitudinal bridge direction to absorb the longitudinal displacement transmitted from the bridge. Engineering practice has found that the cracks in the asphalt pavement of the multi-section guiding plate mainly appear at the position between the first guiding plate and the first expansion joint plate. This is because the traditional load transfer bar cannot transfer the longitudinal tensile displacement. When the temperature drops and the main beam shrinks, the first guiding plate near the bridge is in tension, and the longitudinal tensile displacement cannot be transferred to the second guiding plate. The gap width between the first guiding plate and the first expansion joint plate is greater than the limit value of the gap width that will cause cracks in the asphalt pavement, resulting in cracks in the asphalt pavement. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a guiding plate structure with a UHPC dovetail tenon and mortise component and a construction method therefor, which can effectively absorb and transfer the longitudinal displacement generated by the temperature change of the main beam of the seamless bridge, thereby avoiding cracks in the asphalt pavement.

[0004] The present invention is implemented as follows: A guiding plate structure with a UHPC dovetail tenon and mortise component includes a first guiding plate and a second guiding plate located between the main beam and the connecting road surface. The first guiding plate and the second guiding plate are connected by a tenon and mortise component. The tenon and mortise component includes a first connecting piece and a second connecting piece hooked together. The first connecting piece is provided with a dovetail-shaped first tenon and a first mortise. The second connecting piece is provided with a dovetail-shaped second mortise and a second tenon that respectively cooperate with the first tenon and the first mortise of the first connecting piece. An inner compression material layer is clamped between the first tenon and the second tenon; an outer compression material layer is clamped between the end face of the first tenon and the side face of the second mortise and between the end face of the second tenon and the side face of the first mortise.

[0005] Further, both the first connecting piece and the second connecting piece are cast from ultra-high performance concrete. An expansion joint plate is clamped between the second guiding plate and the connecting road surface. A sliding material layer is provided between the bottom surface of the first mortise and the top surface of the second tenon and between the bottom surface of the second mortise and the top surface of the first tenon.

[0006] Further, a guiding plate sliding material layer is laid below the first guiding plate, the second guiding plate, the tenon and mortise component, and the expansion joint plate. There is backfill behind the abutment below the connecting road surface and the guiding plate sliding material layer.

[0007] Furthermore, connecting steel bars are connected between the first guide plate and the main beam, and guide plate connecting steel bars are connected between the first connecting piece and the first guide plate and between the second connecting piece and the second guide plate.

[0008] A construction method of a guide plate structure with a UHPC dovetail tenon and mortise assembly as described above includes the following steps: (1) Prefabricate the first connecting piece and the second connecting piece in the factory and embed the guide plate connecting steel bars; (2) Arrange an outer compression material layer, an inner compression material layer, and a sliding material layer between the first connecting piece and the second connecting piece, and assemble the first connecting piece and the second connecting piece in the factory to form a tenon and mortise assembly; (3) Transport the tenon and mortise assembly to the construction site and cast it integrally with the first guide plate and the second guide plate through the guide plate connecting steel bars at both ends.

[0009] Compared with the prior art, the present invention has the following beneficial effects: The guide plate structure with a UHPC dovetail tenon and mortise assembly of the present invention absorbs and transfers the longitudinal displacement of the seamless bridge main beam caused by temperature changes between the guide plates, thereby avoiding cracks in the asphalt pavement; The UHPC material has high strength and high durability. The tenon and mortise assembly is prefabricated in the factory and the load transfer bars are cancelled, which has the advantages of reducing the requirements for the construction site, reducing the construction difficulty, shortening the construction time, and reducing the construction labor cost, etc., improving the service performance and economy.

[0010] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further elaborate on the present invention through specific embodiments and related drawings. Description of the Drawings

[0011] Figure 1 is the overall structure schematic diagram of the embodiment of the present invention;

[0012] Figure 2 is the structure schematic diagram of the tenon and mortise assembly of the embodiment of the present invention;

[0013] Figure 3 is the structure schematic diagram of the first connecting piece in the embodiment of the present invention;

[0014] Figure 4 is the schematic diagram of the prefabrication process of the first connecting piece in the embodiment of the present invention;

[0015] Explanation of the reference numerals in the drawings: 1 - first guide plate, 2 - second guide plate, 3 - tenon and mortise assembly, 4 - expansion joint board, 5 - connecting road surface, 6 - connecting steel bar, 7 - main beam, 8 - guide plate sliding material layer, 9 - backfill behind abutment, 10 - first connecting piece, 11 - second connecting piece, 12 - top surface of the first tenon, 13 - bottom surface of the first mortise, 14 - end face of the first tenon, 15 - guide plate connecting steel bar, 16 - first outer compression material layer, 17 - second outer compression material layer, 18 - inner compression material layer, 19 - first sliding material layer, 20 - second sliding material layer. Detailed implementation manners

[0016] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0017] It should be noted that the terms used herein are only for describing the specific implementation manners and are not intended to limit the exemplary implementation manners according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0018] As Figures 1 to 3 shown, a guiding plate structure with a UHPC dovetail mortise and tenon assembly includes a first guiding plate 1 and a second guiding plate 2 located between a main beam 7 and an access road surface 5. The first guiding plate 1 and the second guiding plate 2 are connected by a mortise and tenon assembly 3. The mortise and tenon assembly 3 includes a first connecting member 10 and a second connecting member 11 hooked together. The first connecting member 10 is provided with a dovetail-shaped first tenon and a first mortise. The second connecting member is provided with a dovetail-shaped second mortise and a second tenon that respectively cooperate with the first tenon and the first mortise of the first connecting member. The structures of the first connecting member and the second connecting member are the same; an inner compression material layer 18 is clamped between the first tenon and the second tenon; an outer compression material layer is clamped between the end face of the first tenon and the side face of the second mortise and between the end face of the second tenon and the side face of the first mortise, which are a first outer compression material layer 16 and a second outer compression material layer 17 respectively; the inner and outer compression material layers can be made of pearl cotton foam board, rubber board, etc. The mortise and tenon assembly is composed of two first connecting members with tenons and mortises that are engaged and connected. The outer compression material layer can absorb the longitudinal bridge-directional displacement under thrust, and the inner compression material layer can absorb the longitudinal bridge-directional displacement under tension; so that regardless of whether the temperature rises or falls, the longitudinal bridge-directional displacement of the main beam can be absorbed and transmitted by the compression material layer, avoiding cracks in the asphalt pavement; among them, the mortise and tenon assembly is prefabricated in a factory, which has the advantages of reducing the requirements for the construction site, reducing the construction difficulty, shortening the construction time, and reducing the construction labor cost.

[0019] In this embodiment, both the first connecting member 10 and the second connecting member 11 are cast from ultra-high performance concrete. Ultra-high performance concrete casting (UHPC) has the advantages of high strength and good durability.

[0020] In this embodiment, a expansion joint board 4 is clamped between the second guiding board 2 and the connecting road surface 5. A sliding material layer is provided between the bottom surface of the first mortise groove and the top surface of the second tenon, and between the bottom surface of the second mortise groove and the top surface of the first tenon, which are the first sliding material layer 19 and the second sliding material layer 20 respectively. The sliding material layer can be made of galvanized iron sheet, tar paper, etc.; it is beneficial for relative movement to occur between the first connecting piece and the second connecting piece, reducing the longitudinal bridge friction force on the horizontal contact surface between the first connecting piece and the second connecting piece. The sliding material layer of the mortise and tenon assembly is a rigid material and does not produce vertical compression deformation. Therefore, uneven settlement can be prevented, and thus the traditional dowel bar can be eliminated, which has the advantages of reducing construction difficulty, shortening construction time, and reducing construction labor costs. When the temperature rises, the first guiding board and the first connecting piece close to the main beam are pushed, transferring the longitudinally pushed displacement to the outer compression material layer, causing the outer compression material layer to undergo compression deformation; after the outer compression material layer reaches the compression limit, the longitudinal displacement is transferred to the second connecting piece and the second guiding board. When the temperature drops, the first guiding board and the first connecting piece close to the main beam are pulled, transferring the longitudinally pulled displacement to the inner compression material layer, causing the inner compression material layer to undergo compression deformation; after the inner compression material layer reaches the compression limit, the longitudinal displacement is transferred to the second connecting piece and the second guiding board, causing a gap to appear at the second guiding board and the expansion joint board, but the width of the gap is less than the limit value of the gap width that will cause cracks in the asphalt pavement, avoiding cracks in the asphalt pavement; in the specific implementation process, if the gap width still does not meet the requirements, it can be solved by serially adding guiding boards with mortise and tenon assemblies along the longitudinal bridge direction.

[0021] In this embodiment, a guiding board sliding material layer 8 is laid under the first guiding board 1, the second guiding board 2, the mortise and tenon assembly 3 and the expansion joint board 4. The guiding board sliding material layer can be made of a sand cushion layer, etc., which is beneficial for the longitudinal movement of the guiding board and the connecting piece; there is a backfill soil 9 under the connecting road surface 5 and the guiding board sliding material layer 8.

[0022] In this embodiment, a connecting steel bar 6 is connected between the first guiding board 1 and the main beam 7, and a guiding board connecting steel bar 15 is connected between the first connecting piece 10 and the first guiding board 1 and between the second connecting piece 11 and the second guiding board 2; the guiding board connecting steel bar is reserved when prefabricating the connecting piece, which is convenient for casting the guiding board concrete on the construction site and connecting it into a whole with the guiding board.

[0023] A construction method for a guiding board structure with a UHPC dovetail mortise and tenon assembly as described above includes the following steps: (1) Prefabricate the first connecting piece and the second connecting piece in the factory and embed the guiding board connecting steel bar; (2) Arrange an outer compression material layer, an inner compression material layer and a sliding material layer between the first connecting piece and the second connecting piece, and assemble the first connecting piece and the second connecting piece in the factory to form a mortise and tenon assembly; (3) Transport the mortise and tenon assembly to the construction site and cast it into a whole with the first guiding board and the second guiding board through the guiding board connecting steel bars at both ends.

[0024] In this embodiment, at the construction site, connecting steel bars also need to be embedded at the end of the main beam. A guide plate sliding material layer is arranged in advance on the backfill soil between the main beam and the connecting road surface, and then the mortise and tenon assembly is placed to pour the first guide plate and the second guide plate. The first guide plate and the main beam are connected together through the connecting steel bars, and an expansion joint plate is provided between the second guide plate and the connecting road surface.

[0025] For any of the technical solutions disclosed in the present invention above, unless otherwise stated, if it discloses a numerical range, the disclosed numerical range is a preferred numerical range. Any person skilled in the art should understand that the preferred numerical range is only the numerical values with obvious technical effects or representativeness among many implementable numerical values. Since there are too many numerical values to list them all, the present invention only discloses some numerical values to illustrate the technical solutions of the present invention. Moreover, the above-listed numerical values should not constitute a limitation on the protection scope of the present invention.

[0026] If the present invention discloses or involves components or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connected by bolts or screws), or it can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integral structure (for example, manufactured by integral casting process) (except when it is obviously impossible to adopt the integral forming process).

[0027] In addition, for the terms used to represent the positional relationship or shape in any of the technical solutions disclosed in the present invention above, unless otherwise stated, their meanings include states or shapes that are approximate, similar or close to them.

[0028] Any component provided by the present invention can either be assembled from multiple separate components or be a single component manufactured by an integral forming process.

[0029] The above is only a preferred embodiment of the present invention, and it is not a limitation of the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution content of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. A guiding plate structure with a UHPC dovetail mortise and tenon assembly, characterized in that: It includes a first guiding plate and a second guiding plate located between the main beam and the connecting road surface. The first guiding plate and the second guiding plate are connected by a mortise and tenon component. The mortise and tenon component includes a first connecting piece and a second connecting piece hooked together. The first connecting piece is provided with a dovetail-shaped first tenon and a first mortise. The second connecting piece is provided with a dovetail-shaped second mortise and a second tenon that respectively cooperate with the first tenon and the first mortise of the first connecting piece. An inner compression material layer is clamped between the first tenon and the second tenon; an outer compression material layer is clamped between the end face of the first tenon and the side face of the second mortise and between the end face of the second tenon and the side face of the first mortise; both the first connecting piece and the second connecting piece are cast from ultra-high performance concrete. A expansion joint plate is clamped between the second guiding plate and the connecting road surface. A sliding material layer is arranged between the bottom surface of the first mortise and the top surface of the second tenon and between the bottom surface of the second mortise and the top surface of the first tenon. The sliding material layer is a rigid material.

2. The lead plate structure with a UHPC dovetail tenon and mortise component according to claim 1, characterized in that: An underlayment sliding material layer is laid below the first guiding plate, the second guiding plate, the mortise and tenon component and the expansion joint plate. There is backfill behind the abutment below the connecting road surface and the underlayment sliding material layer.

3. The lead plate structure with the UHPC dovetail mortise and tenon component according to claim 2, characterized in that: Connecting steel bars are connected between the first guiding plate and the main beam. Guide plate connecting steel bars are connected between the first connecting piece and the first guiding plate and between the second connecting piece and the second guiding plate.

4. A construction method of the guide plate structure with a UHPC dovetail tenon and mortise component as described in claim 3, characterized in that: It includes the following steps: (1) Prefabricate the first connecting piece and the second connecting piece in the factory and embed the guide plate connecting steel bars; (2) Arrange an outer compression material layer, an inner compression material layer and a sliding material layer between the first connecting piece and the second connecting piece, and assemble the first connecting piece and the second connecting piece in the factory to form a mortise and tenon component; (3) Transport the mortise and tenon component to the construction site and cast it integrally with the first guiding plate and the second guiding plate through the guide plate connecting steel bars at both ends.

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