Fabricated UHPC (Ultra High Performance Concrete) composite beam bridge and construction method

Abstract

The invention belongs to the technical field of bridge engineering, particularly relates to a fabricated UHPC (Ultra High Performance Concrete) composite beam bridge and a construction method, and aims to solve the problems that in the prior art, two adjacent prefabricated beam bridges are difficult to connect and low in efficiency, and the prefabricated beam bridges and piers cannot be effectively mounted, so that the prefabricated beam bridges and the piers are easy to displace in the later period. The bridge comprises a plurality of bridge piers and bridge bodies, the bridge piers are located between every two adjacent bridge bodies and used for supporting the two adjacent bridge bodies, and two lower enclosure bases are fixedly connected to the bottoms of the bridge piers. Meanwhile, the stability of the bridge pier and the bridge can be improved through a circular ring, in addition, two adjacent bridges can be easily connected by rotating a rotating sleeve, and in addition, a third connecting structure is used for connecting the two adjacent bridges and can also be used for enabling a U-shaped baffle and a disc to be mutually clamped.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge engineering, and in particular to an assembled UHPC composite beam bridge and a construction method. Background Art

[0002] Ultra-high-performance concrete (UHPC) is a new cement-based composite material developed over the past three decades. It boasts exceptional mechanical properties and durability, along with excellent toughness, bonding, impact resistance, and fatigue resistance. In recent years, as UHPC production technology matures and its superior performance becomes increasingly recognized, UHPC has become a research hotspot in the concrete field, with widespread use in structural applications, decoration, reinforcement, quick repair, paving, and joint filling.

[0003] The UHPC composite beam bridge features a 12cm-thick reinforced UHPC deck, with a single deck width of 1.98m and support spacing of 1.1m. It uses T150 UHPC material (cubic compressive strength of 120 MPa and ultimate tensile strain of 1500μ, meeting Swiss UA standards) and HRB400 steel reinforcement.

[0004] With the further advancement of bridge industrialization, the construction method has gradually changed from the traditional on-site casting of all components to factory prefabrication of some or most components, which are then transported to the site for installation. Compared with traditional construction methods, the first thing to be solved in the industrial prefabrication method is the connection between the prefabricated components.

[0005] However, the following problems still exist in the installation and construction process of prefabricated beam bridges in the prior art:

[0006] 1. When connecting two precast beam bridges, it is often necessary to extend multiple special steel bars into the two corresponding precast beam bridges and connect them with the steel bars in the precast beam bridges. Due to the large size of the precast beam bridges and the large number of steel bars, construction workers need to connect the steel bars one by one. It is also difficult to connect two adjacent precast beam bridges through steel bars, which slows down the construction efficiency in the later stage.

[0007] 2. When the prefabricated beam bridge is lifted to the pier by a tower crane, the prefabricated beam bridge is often directly erected on the pier and the two are connected by concrete. The prefabricated beam bridge and the pier cannot be effectively installed, which makes it easy for the prefabricated beam bridge and the pier to be displaced in the later stage.

[0008] In response to the above problems, this invention document proposes an assembled UHPC composite beam bridge and a construction method. Summary of the Invention

[0009] The present invention provides an assembled UHPC composite beam bridge and a construction method, which solves the shortcomings of the prior art in which the connection of two adjacent prefabricated beam bridges is difficult and inefficient, and the prefabricated beam bridges and piers cannot be effectively installed, resulting in the easy displacement of the prefabricated beam bridges and piers in the later stage.

[0010] The present invention provides the following technical solutions:

[0011] A prefabricated UHPC composite beam bridge comprises: a plurality of piers and bridges, wherein the piers are located between two adjacent bridges and are used to support the two adjacent bridges, the bottoms of the piers are fixedly connected to two lower retaining bases, the bottoms of the piers are fixedly connected to a plurality of anchor rods, a plurality of T-slots are provided on both sides of the tops of the piers, a plurality of T-blocks matching the T-slots are fixedly connected on both sides of the bottoms of the bridges close to the piers, two adjacent bridges are closed by two side closing plates, and the bottoms of the two side closing plates are fixedly connected to the tops of the piers; when the bridge is erected on the tops of the piers, the T-blocks just dock with the T-slots, and the piers and the bridges are preliminarily connected by concrete, and the cooperation of the T-blocks and the T-slots can increase the contact area between the piers and the bridges, increase the contact area of the concrete on the piers and the bridges, and make the connection between the piers and the bridges more stable;

[0012] Two sets of first connection structures are respectively provided on both sides of the top of the pier, and are used to fix the pier and one end of the bridge to prevent displacement between the pier and the bridge;

[0013] The second connecting structure is provided on the top of the pier and is used to connect two adjacent bridges to further increase the stability between the two bridges and the pier;

[0014] The third connecting structure is provided on both sides of the bridge and is used to connect two adjacent bridges.

[0015] In one possible design, the first connection structure includes a plurality of steel pins fixedly connected to one side of the top of the pier, and a plurality of first pin holes and second pin holes are provided at the bottom of both sides of the bridge, and the first pin holes and the second pin holes are respectively matched with the steel pins, and two adjacent first pin holes and second pin holes are connected by a slurry hole, which is used to allow concrete in the second pin hole to enter the first pin hole, and a grouting hole for grouting is provided on one side of the second pin hole; the bridge is hoisted to the top of the pier by a crane, and the first pin holes and the second pin holes can be aligned with the steel pins, and the bridge is placed on the top of the pier. During the process of moving the bridge downward, the plurality of steel pins are respectively inserted into the first pin holes and the second pin holes, and concrete is injected into the first pin holes and the second pin holes through the grouting holes and the slurry holes to increase the stability between the pier and the bridge.

[0016] In one possible design, the second connection structure includes a plurality of bases fixedly connected to the top of the pier, the top of the base is fixedly connected to a supporting block, the supporting block is rotatably connected to a rotating sleeve, the rotating sleeve is provided with positive and negative internal threads, the internal threads of the supporting block are connected to two screws, and the two screws are respectively located on the positive and negative thread sections of the internal threads of the rotating sleeve, and the end of the screw away from the supporting block is fixedly connected to a disk, the outer wall of the disk is fixedly connected to a plurality of sliders, the supporting block is provided with a groove, and the outer wall fixed sleeve of the rotating sleeve is provided with a hexagonal block located in the groove; the rotating sleeve can be driven to rotate by the hexagonal block, and the groove gives way to the hexagonal block, and the rotating sleeve is rotated by the cooperation of the hexagonal wrench and the hexagonal block. Since the slider slides in the slide groove, as the rotating sleeve rotates, the screw drives the disk and the slider to extend through the through hole into the connecting hole, so as to connect two adjacent bridges;

[0017] Both sides of the bridge are provided with multiple through holes that cooperate with the disc, and the inner walls of the through holes are fixedly connected with multiple sliding grooves that slide with the slider. The disc can be extended into the bridge through the cooperation of the sliding groove and the slider. A plurality of connecting holes are provided in the bridge, and the connecting holes are connected with the through holes and the sliding grooves. The inner diameter of the connecting hole is larger than the inner diameter of the through hole. The difference in the inner diameter of the connecting hole and the through hole can make the disc and the slider rotate, and the slider can be clamped in the connecting hole; when the disc and the slider extend into the connecting hole, the rotating sleeve, screw, disc and slider are rotated as a whole to make the slider and the sliding groove intertwine. At this time, when the screw drives the disc to retract, the slider can increase the stability of the connection with the bridge.

[0018] In one possible design, the third connecting structure includes a plurality of first hook steel bars and second hook steel bars arranged on both sides of the bridge, and the first hook steel bars and the second hook steel bars are arranged in an alternating manner, and the first hook steel bars and the second hook steel bars between two adjacent bridges cooperate with each other, and two installation grooves are provided on the sides of the two bridges away from each other, and baffles are provided in the installation grooves between the two adjacent bridges; when the two bridges are built on the piers, the first hook steel bars and the second hook steel bars between the two bridges are arranged in an alternating manner, and the baffles are inserted into the installation grooves between the two bridges at this time, and the first hook steel bars and the second hook steel bars are surrounded by the two baffles, and then concrete is poured between the two baffles. After the concrete solidifies, the first hook steel bars and the second hook steel bars cooperate to wrap the concrete, thereby further increasing the stability between the two bridges.

[0019] In a possible design, a plurality of U-shaped baffles extending into the connecting holes are slidably connected in the bridge, and the U-shaped baffles are used to block the discs. A plurality of countersunk holes are provided on the top of the U-shaped baffles, and countersunk bolts are provided in the countersunk holes. Two side closing plates are provided between two adjacent bridges.

[0020] In one possible design, the outer wall of the pier is fixedly sleeved with an upper retaining base, and the bottom of the bridge is fixedly connected with a plurality of top blocks, and both sides of the top blocks are fixedly connected with diagonal bracing beams, and the end of the diagonal bracing beam away from the top block is clamped with the upper retaining base; when the bridge is subjected to pressure, the bridge can not only share the pressure to the two ends in contact with the pier, but also the pressure can be transmitted to the upper retaining base through the cooperation of the top blocks and the diagonal bracing beams, and the upper retaining base can transmit the force to the side of the pier, and then can transmit the pressure on the bridge to different positions on the pier, which not only increases the direction of pressure transmission of the bridge to achieve the stability of the bridge, but also transmits the pressure of the bridge to different positions of the pier, which can disperse the pressure borne by the pier and increase the stability of the pier.

[0021] In a possible design, the two screw rods are slidably connected to the same sliding rod, both ends of the sliding rod are fixedly connected to baffles, and the two screw rods are fixedly connected to limit rings for limiting the baffles; when the two screw rods slide to both sides, the sliding rod can increase the stability of the two screw rods and prevent the screw rods from shaking.

[0022] In one possible design, the steel bar pin includes a cylindrical pin and a tapered platform, the tapered platform is fixedly connected to the top end of the cylindrical pin for guiding the first pin hole and the second pin hole, and the outer wall of the cylindrical pin is fixedly sleeved with multiple rings; the bridge is placed on the top of the pier, and during the lowering process of the bridge, the tapered platform can guide the first pin hole and the second pin hole, so that the multiple cylindrical pins are respectively inserted into the first pin hole and the second pin hole, and concrete is injected into the first pin hole and the second pin hole through the slurry hole and the grouting hole. Since the outer wall of the cylindrical pin is provided with multiple rings, the rings can increase the contact area between the cylindrical pin and the concrete, which is used to increase the stability of the cylindrical pin and the bridge.

[0023] In a possible design, two connecting rods are fixedly passed through both sides of the top of the bridge, connecting columns are fixedly passed through both sides of the top of the bridge, and the connecting columns are located between two adjacent connecting rods, the bottom ends of the two connecting rods on the same side are fixedly connected to the tops of the corresponding diagonal bracing beams, the bottom ends of the connecting columns are fixedly connected to the tops of the top blocks, the tops of the connecting columns are fixedly connected to the first bottom plate, the tops of the first bottom plate are fixedly connected to guardrails, the tops of the first bottom plate are fixedly connected to fixed columns located between the two guardrails, and the fixed columns are fixedly connected to the two guardrails, the tops of the connecting rods The end is fixedly connected to the bottom of the guardrail, and the bottom of the guardrail away from the fixing column is fixedly connected to a second bottom plate, the bottom of the second bottom plate is fixedly connected to the fixing rod, and the bottom end of the fixing rod is fixedly connected to the bridge; after the pier and the bridge are installed, the connecting rods and connecting columns are inserted into both sides of the bridge, so that the connecting rods and connecting columns are fixedly connected to the top of the diagonal bracing beam and the top block respectively, and the second bottom plate fixes the cylindrical pin to the bridge again through the fixing rod, and then the guardrail is fixedly connected to the top of the first bottom plate and the second bottom plate for protection. At the same time, the protection capability of the guardrail can be increased by the connecting rods, connecting columns and fixing columns.

[0024] The construction method of the assembled UHPC composite beam bridge comprises the following steps:

[0025] S1. First, concrete is laid on the top of the pier and the bottom inner wall of the T-slot. The bridge is hoisted to the top of the pier by a crane. The first pin hole and the second pin hole can be aligned with the cylindrical pin. The bridge is placed on the top of the pier. During the process of lowering the bridge, the first pin hole and the second pin hole can be guided by the tapered platform, so that multiple cylindrical pins are inserted into the first pin hole and the second pin hole respectively. At this time, the T-block just docks with the T-slot, and the pier and the bridge are preliminarily connected by concrete. The cooperation of the T-block and the T-slot can increase the contact area between the pier and the bridge, increase the contact area of the concrete on the pier and the bridge, and make the connection between the pier and the bridge more stable.

[0026] S2. When two adjacent bridges are placed on the piers, one end of the diagonal bracing beam can be snapped onto the top side of the upper retaining base. When the bridge is under pressure, the bridge can not only share the pressure to the two ends in contact with the piers, but also transmit the pressure to the upper retaining base through the cooperation of the top block and the diagonal bracing beam, resulting in a downward force on the upper retaining base. The upper retaining base can then transmit the force to the side of the pier, thereby transmitting the pressure on the bridge to different locations on the pier. This not only increases the direction of pressure transmission on the bridge to achieve bridge stability, but also transmits the bridge pressure to different locations on the pier, which can disperse the pressure on the pier and increase its stability.

[0027] S3. When two adjacent bridges are placed on the piers, the rotating sleeve is rotated by cooperating with the hexagonal wrench and the hexagonal block. Since the slider and the slide groove slide together, as the rotating sleeve rotates, the screw drives the disc and the slider through the through hole to extend into the connecting hole. Then, the rotating sleeve, the screw, the disc and the slider are rotated as a whole, so that the slider and the slide groove are staggered. Then, the U-shaped baffle is extended into the connecting hole. At this time, the U-shaped baffle collides with the side of the disc close to the rotating sleeve, and the disc is blocked and limited by the U-shaped baffle. Due to the friction between the U-shaped baffle and the disc, the rotating sleeve is rotated in the opposite direction at this time, which can make the disc move toward the rotating sleeve. The disc presses the U-shaped baffle, and the U-shaped baffle and the disc are stuck with each other, thereby increasing the stability of the U-shaped baffle and the disc, and at the same time increasing the stability between the two adjacent bridges.

[0028] S4. When two bridges are placed on the piers, the first hook steel bars and the second hook steel bars are arranged alternately between the two bridges. At this time, the baffle is inserted into the installation groove between the two bridges, and the first hook steel bars and the second hook steel bars are surrounded by the two baffles. Then concrete is poured between the two baffles, and the concrete is injected into the first pin hole and the second pin hole through the slurry hole and the grouting hole. Since the outer wall of the cylindrical pin is provided with multiple rings, the contact area between the cylindrical pin and the concrete can be increased through the rings, which is used to increase the stability of the cylindrical pin and the bridge. In addition, after the concrete solidifies, the first bend The hook steel bar and the second bent hook steel bar cooperate to wrap the concrete, further increasing the stability between the two bridges. Then, the screws on both sides of the support block are clamped by a wrench, and the rotating sleeve is driven to rotate by the hexagonal block to relieve the friction between the disc and the U-shaped baffle. The slider is docked with the slide groove again, and the rotating sleeve is continued to rotate. At this time, the screw is clamped by the wrench and cannot rotate with the rotating sleeve. Therefore, the disc is disengaged from the through hole. The base, support block and baffle are removed, and the two sides of the adjacent bridges are fixedly connected by the side closing plate. At this time, an empty groove is formed between the two bridges and the piers for pouring concrete.

[0029] S5. After the piers and bridge are installed, connect the connecting rods and columns on both sides of the bridge, securely connecting them to the top of the diagonal bracing beam and the top block, respectively. The second base plate is secured to the bridge again by cylindrical pins using fixing rods. The guardrail is then securely connected to the tops of the first and second base plates for protection. The connecting rods, connecting columns, and fixing columns enhance the guardrail's protective capabilities.

[0030] S6. The concrete is C50 concrete. When dismantling, a high-pressure water gun can be used to conveniently remove the wet joints of the C50 concrete, thereby achieving the purpose of dismantling and reusing the bridge, piers, and the first and second hook steel bars.

[0031] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the invention.

[0032] In the present invention, the steel bar pin includes a cylindrical pin and a tapered platform, the tapered platform is fixedly connected to the top end of the cylindrical pin for guiding the first pin hole and the second pin hole, and the outer wall of the cylindrical pin is fixedly sleeved with a plurality of circular rings; the bridge is placed on the top of the pier, and during the lowering of the bridge, the tapered platform can guide the first pin hole and the second pin hole, so that the plurality of cylindrical pins are respectively inserted into the first pin hole and the second pin hole, and concrete is injected into the first pin hole and the second pin hole through the slurry hole and the grouting hole. Since the outer wall of the cylindrical pin is provided with a plurality of circular rings, the circular rings can increase the contact area between the cylindrical pin and the concrete, thereby increasing the stability of the cylindrical pin and the bridge;

[0033] The top of the U-shaped baffle slides through the clamping block and extends into the connecting plate; the connecting plate is fixedly connected to the U-shaped baffle by a countersunk bolt, and the U-shaped baffle is inserted into the connecting plate. At this time, the U-shaped baffle collides with the side of the disc close to the rotating sleeve, and the disc is blocked and limited by the U-shaped baffle. The U-shaped baffle and the disc are clamped to each other, thereby increasing the stability of the U-shaped baffle and the disc, and at the same time increasing the stability between the two adjacent bridges. The U-shaped baffle is connected to the connecting plate by the countersunk bolt, further making the connection between the U-shaped baffle and the bridge more stable;

[0034] In the present invention, a plurality of through holes cooperating with the discs are provided on both sides of the bridge, and a plurality of slide grooves slidably cooperating with the sliders are fixedly connected to the inner walls of the through holes. A plurality of connecting holes are provided in the bridge, and the inner diameter of the connecting holes is larger than the inner diameter of the through holes. When the rotating sleeve is easily rotated, the disc and the slider extend into the connecting holes. Then, the rotating sleeve, the screw, the disc and the slider are rotated as a whole, so that the slider and the slide groove are intertwined. At this time, when the screw drives the disc to retract, the slider can increase the stability of the connection with the bridge.

[0035] In the present invention, the outer wall of the pier is fixedly sleeved with an upper retaining base, and the bottom of the bridge is fixedly connected with a plurality of top blocks, and both sides of the top blocks are fixedly connected with diagonal bracing beams, and the end of the diagonal bracing beam away from the top block is clamped with the upper retaining base; when the bridge is subjected to pressure, the bridge can not only share the pressure to the two ends in contact with the pier, but also the pressure can be transmitted to the upper retaining base through the cooperation of the top blocks and the diagonal bracing beams, and the upper retaining base can transmit the force to the side of the pier, and then can transmit the pressure on the bridge to different positions on the pier, which not only increases the direction of pressure transmission of the bridge to achieve the stability of the bridge, but also transmits the pressure of the bridge to different positions of the pier, which can disperse the pressure borne by the pier and increase the stability of the pier.

[0036] In the present invention, the cooperation between the conical platform and the circular ring can not only make it easy to insert multiple cylindrical pins into the first pin hole and the second pin hole, but also when pouring concrete in the later stage, the circular ring can increase the stability of the pier and the bridge. In addition, by rotating the rotating sleeve, two adjacent bridges can be easily connected. In addition, the third connecting structure is not only used to connect the two adjacent bridges, but also can be used to clamp the U-shaped baffle and the disc to each other, thereby ensuring the stability between the two adjacent bridges. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of the three-dimensional structure from a first perspective of an assembled UHPC composite beam bridge provided by an embodiment of the present invention;

[0038] Figure 2 A schematic diagram of the three-dimensional structure from a second perspective of an assembled UHPC composite beam bridge provided by an embodiment of the present invention;

[0039] Figure 3 A schematic diagram of a three-dimensional exploded structure of an assembled UHPC composite beam bridge provided by an embodiment of the present invention;

[0040] Figure 4 A schematic diagram of the three-dimensional structure of the piers, support blocks and side closure plates of an assembled UHPC composite beam bridge provided by an embodiment of the present invention;

[0041] Figure 5 A schematic diagram of the three-dimensional structure of the upper retaining base and the top block of an assembled UHPC composite beam bridge provided by an embodiment of the present invention;

[0042] Figure 6 A schematic diagram of a three-dimensional cross-sectional structure of a support block of an assembled UHPC composite beam bridge provided by an embodiment of the present invention;

[0043] Figure 7 A schematic diagram of a three-dimensional cross-sectional structure of a rotating sleeve of an assembled UHPC composite beam bridge provided by an embodiment of the present invention;

[0044] Figure 8 A schematic diagram of the three-dimensional structure of an assembled UHPC composite beam bridge provided by an embodiment of the present invention;

[0045] Figure 9 A schematic diagram of a three-dimensional cross-sectional structure of an assembled UHPC composite beam bridge provided by an embodiment of the present invention;

[0046] Figure 10 A schematic diagram of a three-dimensional cross-sectional structure of a support block of an assembled UHPC composite beam bridge and two bridges provided in an embodiment of the present invention;

[0047] Figure 11A schematic diagram of the three-dimensional structure of the U-shaped baffle and the disc of an assembled UHPC composite beam bridge provided by an embodiment of the present invention;

[0048] Figure 12 A schematic diagram of a three-dimensional exploded structure of a first hook steel bar, a second hook steel bar, and a baffle in an assembled UHPC composite beam bridge provided by an embodiment of the present invention;

[0049] Figure 13 A schematic diagram of a three-dimensional exploded structure of a prefabricated UHPC composite beam bridge provided by an embodiment of the present invention in which the bridge and cylindrical pins cooperate;

[0050] Figure 14 This is a schematic diagram of the main cross-sectional structure of an assembled UHPC composite beam bridge provided by the embodiment of the present invention in Example 2.

[0051] Reference numerals:

[0052] 1. Pier; 2. Bridge; 3. Lower retaining base; 4. Anchor rod; 5. Upper retaining base; 6. Mounting groove; 7. Side closure plate; 8. Rebar pin; 9. Cylindrical pin; 10. Ring; 11. Conical platform; 12. First pin hole; 13. Second pin hole; 14. Through hole; 15. Slide; 16. Connecting hole; 17. Base; 18. Support block; 19. Rotating sleeve; 20. Hexagonal block; 21. Groove; 22. Screw; 23. Slide; 24. Disc; 25. Slider; 26. First hook steel bar; 27. Second hook steel bar; 28. Connecting rod; 29. Baffle; 30. U-shaped baffle; 31. Countersunk hole; 32. Countersunk bolt; 33. Slurry hole; 34. Grouting hole; 35. Top block; 36. Diagonal bracing beam; 37. T-block; 38. T-slot; 39. Limiting ring; 40. Baffle; 41. Connecting column; 42. First bottom plate; 43. Fixed column; 44. Guardrail; 45. Second bottom plate; 46. Fixed rod. DETAILED DESCRIPTION

[0053] The embodiments of the present invention are described below with reference to the accompanying drawings.

[0054] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms, "connection", and "installation" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. In addition, "communication" can be a direct connection or an indirect connection through an intermediate medium. Here, "fixed" means that the two are connected to each other and the relative position relationship after connection remains unchanged. The directional terms mentioned in the embodiments of the present invention, such as "inside", "outside", "top", "bottom", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0055] In the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0056] In the embodiments of the present invention, "and / or" is simply a description of the association relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0057] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in connection with that embodiment is included in one or more embodiments of the present invention. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0058] Example 1

[0059] Reference Figure 1 、 Figure 2 、 Figure 3 and Figure 4The present embodiment provides an assembled UHPC composite beam bridge, comprising: a plurality of piers 1 and bridges 2. The pier 1 is located between two adjacent bridges 2 and is used to support the two adjacent bridges 2. The bottom of the pier 1 is fixedly connected to two lower retaining bases 3 by bolts. The bottom of the pier 1 is fixedly connected to a plurality of anchor rods 4 by bolts. A plurality of T-slots 38 are provided on both sides of the top of the pier 1. A plurality of T-blocks 37 matching the T-slots 38 are fixedly connected on both sides of the bottom of the bridge 2 near the pier 1 by bolts. The two adjacent bridges 2 are closed by two side closing plates 7, and the bottoms of the two side closing plates 7 are fixedly connected to the top of the pier 1 by bolts. When the bridge 2 is placed on the top of the pier 1, the T-blocks 37 just fit in with the T-slots 38. The T-slots 38 are docked, and the pier 1 and the bridge 2 are preliminarily connected through concrete. The cooperation of the T-block 37 and the T-slot 38 can increase the contact area between the pier 1 and the bridge 2, increase the contact area of the concrete on the pier 1 and the bridge 2, and make the connection between the pier 1 and the bridge 2 more stable; two sets of first connection structures are respectively arranged on both sides of the top of the pier 1, for fixing one end of the pier 1 and the bridge 2 to avoid displacement between the pier 1 and the bridge 2; the second connection structure is arranged on the top of the pier 1, for connecting two adjacent bridges 2, and further increasing the stability between the two bridges 2 and the pier 1; the third connection structure is arranged on both sides of the bridge 2, for connecting two adjacent bridges 2.

[0060] Reference Figure 4 and Figure 13 The first connection structure includes a plurality of steel pins 8 fixedly connected to one side of the top of the pier 1, and a plurality of first pin holes 12 and second pin holes 13 are provided on the bottom of both sides of the bridge 2, and the first pin holes 12 and the second pin holes 13 are respectively matched with the steel pins 8, and the adjacent two first pin holes 12 and second pin holes 13 are connected by a slurry hole 33, which is used to allow the concrete in the second pin holes 13 to enter the first pin holes 12, and a grouting hole 34 for grouting is provided on one side of the second pin holes 13; the bridge 2 is hoisted to the top of the pier 1 by a crane, and the first pin holes 12 and the second pin holes 13 can be aligned with the steel pins 8, and the bridge 2 is placed on the top of the pier 1. During the downward movement of the bridge 2, the plurality of steel pins 8 are respectively inserted into the first pin holes 12 and the second pin holes 13, and concrete is injected into the first pin holes 12 and the second pin holes 13 through the grouting holes 34 and the slurry holes 33 to increase the stability between the pier 1 and the bridge 2.

[0061] Reference Figure 6 、 Figure 7 and Figure 10The second connection structure includes a plurality of bases 17 fixedly connected to the top of the pier 1 by bolts. The top of the base 17 is fixedly connected to a support block 18 by bolts. A rotating sleeve 19 is rotatably connected to the support block 18. The rotating sleeve 19 is provided with positive and negative internal threads. The internal threads of the support block 18 are connected to two screws 22. The two screws 22 are respectively located on the positive and negative thread sections of the internal threads of the rotating sleeve 19. The end of the screw 22 away from the support block 18 is fixedly connected to a disk 24. The outer wall of the disk 24 is fixedly connected to a plurality of sliders 25. , a groove 21 is provided in the support block 18, and a fixed sleeve on the outer wall of the rotating sleeve 19 is provided with a hexagonal block 20 located in the groove 21; the rotating sleeve 19 can be driven to rotate by the hexagonal block 20, and the groove 21 makes way for the hexagonal block 20. The rotating sleeve 19 is rotated by the cooperation of the hexagonal wrench and the hexagonal block 20. Since the slider 25 slides with the slide groove 15, as the rotating sleeve 19 rotates, the screw 22 drives the disc 24 and the slider 25 through the through hole 14 to extend into the connecting hole 16, so as to facilitate the connection of two adjacent bridges 2;

[0062] Both sides of the bridge 2 are provided with a plurality of through holes 14 that cooperate with the disc 24. The inner walls of the through holes 14 are fixedly connected with a plurality of slide grooves 15 that slide with the slider 25. The disc 24 can be extended into the bridge 2 through the cooperation of the slide grooves 15 and the slider 25. A plurality of connecting holes 16 are provided in the bridge 2, and the connecting holes 16 are connected with the through holes 14 and the slide grooves 15. The inner diameter of the connecting holes 16 is larger than the inner diameter of the through holes 14. The difference in the inner diameters of the connecting holes 16 and the through holes 14 can enable the disc 24 and the slider 25 to rotate and then be clamped in the connecting holes 16; when the disc 24 and the slider 25 extend into the connecting holes 16, the rotating sleeve 19, the screw 22, the disc 24 and the slider 25 are rotated as a whole, so that the slider 25 is staggered with the slide groove 15. At this time, when the screw 22 drives the disc 24 to retract, the slider 25 can increase the stability of the connection with the bridge 2.

[0063] Reference Figure 3 and Figure 12The third connecting structure includes a plurality of first hook steel bars 26 and second hook steel bars 27 arranged on both sides of the bridge 2, and the first hook steel bars 26 and the second hook steel bars 27 are arranged in an alternating manner. The first hook steel bars 26 and the second hook steel bars 27 between the two adjacent bridges 2 cooperate with each other. Two mounting grooves 6 are provided on the side of the two bridges 2 away from each other, and a baffle 29 is provided in the mounting groove 6 between the two adjacent bridges 2; when the two bridges 2 are built on the pier 1, the first hook steel bars 26 and the second hook steel bars 27 between the two bridges 2 are arranged in an alternating manner. At this time, the baffle 29 is inserted into the mounting groove 6 between the two bridges 2, and the first hook steel bars 26 and the second hook steel bars 27 are surrounded by the two baffles 29, and then concrete is poured between the two baffles 29. After the concrete solidifies, the first hook steel bars 26 and the second hook steel bars 27 cooperate to wrap the concrete, thereby further increasing the stability between the two bridges 2.

[0064] Reference Figure 10 and Figure 11 There are multiple U-shaped baffles 30 slidingly connected in the bridge 2 and extending into the connecting hole 16. The U-shaped baffles 30 are used to block the discs 24 and 24. A plurality of countersunk holes 31 are provided on the top of the U-shaped baffle 30, and countersunk bolts 32 are provided in the countersunk holes 31. Two side closing plates 7 are provided between the two adjacent bridges 2.

[0065] Reference Figure 3 and Figure 5 The outer wall of the pier 1 is provided with an upper retaining base 5 by means of bolt fixing sleeves, and the bottom of the bridge 2 is fixedly connected with a plurality of top blocks 35 by bolts. Both sides of the top blocks 35 are fixedly connected with diagonal bracing beams 36 by bolts, and the end of the diagonal bracing beams 36 away from the top blocks 35 is clamped with the upper retaining base 5; when the bridge 2 is subjected to pressure, the bridge 2 can not only share the pressure to the two ends in contact with the pier 1, but also the pressure can be transmitted to the upper retaining base 5 through the cooperation of the top blocks 35 and the diagonal bracing beams 36, and the upper retaining base 5 can transmit the force to the side of the pier 1, and then can transmit the pressure exerted on the bridge 2 to different positions on the pier 1, which not only increases the direction of pressure transmission of the bridge 2 to achieve the stability of the bridge 2, but also transmits the pressure of the bridge 2 to different positions of the pier 1, which can disperse the pressure borne by the pier 1 and increase the stability of the pier 1.

[0066] Reference Figure 7 The two screw rods 22 are slidably connected to the same sliding rod 23, and both ends of the sliding rod 23 are fixedly connected to the baffle 40 by bolts. The two screw rods 22 are fixedly connected to the limiting ring 39 for limiting the baffle 40; when the two screw rods 22 slide to both sides, the sliding rod 23 can increase the stability of the two screw rods 22 and prevent the screw rods 22 from shaking.

[0067] Reference Figure 13The steel bar pin 8 includes a cylindrical pin 9 and a tapered platform 11. The tapered platform 11 is fixedly connected to the top of the cylindrical pin 9 by bolts to guide the first pin hole 12 and the second pin hole 13. The outer wall of the cylindrical pin 9 is fixedly sleeved with multiple rings 10; the bridge 2 is placed on the top of the pier 1. During the downward movement of the bridge 2, the tapered platform 11 can guide the first pin hole 12 and the second pin hole 13, so that the multiple cylindrical pins 9 are respectively inserted into the first pin hole 12 and the second pin hole 13, and concrete is injected into the first pin hole 12 and the second pin hole 13 through the slurry hole 33 and the grouting hole 34. Since the outer wall of the cylindrical pin 9 is provided with multiple rings 10, the rings 10 can increase the contact area between the cylindrical pin 9 and the concrete, which is used to increase the stability of the cylindrical pin 9 and the bridge 2.

[0068] Example 2

[0069] Reference Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The present embodiment provides an assembled UHPC composite beam bridge, comprising: a plurality of piers 1 and bridges 2. The pier 1 is located between two adjacent bridges 2 and is used to support the two adjacent bridges 2. The bottom of the pier 1 is fixedly connected to two lower retaining bases 3 by bolts. The bottom of the pier 1 is fixedly connected to a plurality of anchor rods 4 by bolts. A plurality of T-slots 38 are provided on both sides of the top of the pier 1. A plurality of T-blocks 37 matching the T-slots 38 are fixedly connected on both sides of the bottom of the bridge 2 near the pier 1 by bolts. The two adjacent bridges 2 are closed by two side closing plates 7, and the bottoms of the two side closing plates 7 are fixedly connected to the top of the pier 1 by bolts. When the bridge 2 is placed on the top of the pier 1, the T-blocks 37 just fit in with the T-slots 38. The T-slots 38 are docked, and the pier 1 and the bridge 2 are preliminarily connected through concrete. The cooperation of the T-block 37 and the T-slot 38 can increase the contact area between the pier 1 and the bridge 2, increase the contact area of the concrete on the pier 1 and the bridge 2, and make the connection between the pier 1 and the bridge 2 more stable; two sets of first connection structures are respectively arranged on both sides of the top of the pier 1, for fixing one end of the pier 1 and the bridge 2 to avoid displacement between the pier 1 and the bridge 2; the second connection structure is arranged on the top of the pier 1, for connecting two adjacent bridges 2, and further increasing the stability between the two bridges 2 and the pier 1; the third connection structure is arranged on both sides of the bridge 2, for connecting two adjacent bridges 2.

[0070] Reference Figure 4 and Figure 13The first connection structure includes a plurality of steel pins 8 fixedly connected to one side of the top of the pier 1, and a plurality of first pin holes 12 and second pin holes 13 are provided on the bottom of both sides of the bridge 2, and the first pin holes 12 and the second pin holes 13 are respectively matched with the steel pins 8, and the adjacent two first pin holes 12 and second pin holes 13 are connected by a slurry hole 33, which is used to allow the concrete in the second pin holes 13 to enter the first pin holes 12, and a grouting hole 34 for grouting is provided on one side of the second pin holes 13; the bridge 2 is hoisted to the top of the pier 1 by a crane, and the first pin holes 12 and the second pin holes 13 can be aligned with the steel pins 8, and the bridge 2 is placed on the top of the pier 1. During the downward movement of the bridge 2, the plurality of steel pins 8 are respectively inserted into the first pin holes 12 and the second pin holes 13, and concrete is injected into the first pin holes 12 and the second pin holes 13 through the grouting holes 34 and the slurry holes 33 to increase the stability between the pier 1 and the bridge 2.

[0071] Reference Figure 6 、 Figure 7 and Figure 10 The second connection structure includes a plurality of bases 17 fixedly connected to the top of the pier 1 by bolts. The top of the base 17 is fixedly connected to a support block 18 by bolts. A rotating sleeve 19 is rotatably connected to the support block 18. The rotating sleeve 19 is provided with positive and negative internal threads. The internal threads of the support block 18 are connected to two screws 22. The two screws 22 are respectively located on the positive and negative thread sections of the internal threads of the rotating sleeve 19. The end of the screw 22 away from the support block 18 is fixedly connected to a disk 24. The outer wall of the disk 24 is fixedly connected to a plurality of sliders 25. , a groove 21 is provided in the support block 18, and a fixed sleeve on the outer wall of the rotating sleeve 19 is provided with a hexagonal block 20 located in the groove 21; the rotating sleeve 19 can be driven to rotate by the hexagonal block 20, and the groove 21 makes way for the hexagonal block 20. The rotating sleeve 19 is rotated by the cooperation of the hexagonal wrench and the hexagonal block 20. Since the slider 25 slides with the slide groove 15, as the rotating sleeve 19 rotates, the screw 22 drives the disc 24 and the slider 25 through the through hole 14 to extend into the connecting hole 16, so as to facilitate the connection of two adjacent bridges 2;

[0072] Both sides of the bridge 2 are provided with a plurality of through holes 14 that cooperate with the disc 24. The inner walls of the through holes 14 are fixedly connected with a plurality of slide grooves 15 that slide with the slider 25. The disc 24 can be extended into the bridge 2 through the cooperation of the slide grooves 15 and the slider 25. A plurality of connecting holes 16 are provided in the bridge 2, and the connecting holes 16 are connected with the through holes 14 and the slide grooves 15. The inner diameter of the connecting holes 16 is larger than the inner diameter of the through holes 14. The difference in the inner diameters of the connecting holes 16 and the through holes 14 can enable the disc 24 and the slider 25 to rotate and then be clamped in the connecting holes 16; when the disc 24 and the slider 25 extend into the connecting holes 16, the rotating sleeve 19, the screw 22, the disc 24 and the slider 25 are rotated as a whole, so that the slider 25 is staggered with the slide groove 15. At this time, when the screw 22 drives the disc 24 to retract, the slider 25 can increase the stability of the connection with the bridge 2.

[0073] Reference Figure 3 and Figure 12 The third connection structure includes a plurality of first hook steel bars 26 and second hook steel bars 27 arranged on both sides of the bridge 2 (the first hook steel bars 26 and the second hook steel bars 27 can be removed from the bridge 2), and the first hook steel bars 26 and the second hook steel bars 27 are arranged in an alternating manner, and the first hook steel bars 26 and the second hook steel bars 27 between the two adjacent bridges 2 cooperate with each other. Two mounting grooves 6 are provided on the sides of the two bridges 2 away from each other, and baffles 29 are provided in the mounting grooves 6 between the two adjacent bridges 2; when the two bridges 2 are built on the pier 1, the first hook steel bars 26 and the second hook steel bars 27 between the two bridges 2 are arranged in an alternating manner. At this time, the baffles 29 are inserted into the mounting grooves 6 between the two bridges 2, and the first hook steel bars 26 and the second hook steel bars 27 are surrounded by the two baffles 29, and then concrete is poured between the two baffles 29. After the concrete solidifies, the first hook steel bars 26 and the second hook steel bars 27 cooperate to wrap the concrete, further increasing the stability between the two bridges 2.

[0074] Reference Figure 10 and Figure 11 There are multiple U-shaped baffles 30 slidingly connected in the bridge 2 and extending into the connecting hole 16. The U-shaped baffles 30 are used to block the discs 24 and 24. A plurality of countersunk holes 31 are provided on the top of the U-shaped baffle 30, and countersunk bolts 32 are provided in the countersunk holes 31. Two side closing plates 7 are provided between the two adjacent bridges 2.

[0075] Reference Figure 3 and Figure 5The outer wall of the pier 1 is provided with an upper retaining base 5 by means of bolt fixing sleeves, and the bottom of the bridge 2 is fixedly connected with a plurality of top blocks 35 by bolts. Both sides of the top blocks 35 are fixedly connected with diagonal bracing beams 36 by bolts, and the end of the diagonal bracing beams 36 away from the top blocks 35 is clamped with the upper retaining base 5; when the bridge 2 is subjected to pressure, the bridge 2 can not only share the pressure to the two ends in contact with the pier 1, but also the pressure can be transmitted to the upper retaining base 5 through the cooperation of the top blocks 35 and the diagonal bracing beams 36, and the upper retaining base 5 can transmit the force to the side of the pier 1, and then can transmit the pressure exerted on the bridge 2 to different positions on the pier 1, which not only increases the direction of pressure transmission of the bridge 2 to achieve the stability of the bridge 2, but also transmits the pressure of the bridge 2 to different positions of the pier 1, which can disperse the pressure borne by the pier 1 and increase the stability of the pier 1.

[0076] Reference Figure 7 The two screw rods 22 are slidably connected to the same sliding rod 23, and both ends of the sliding rod 23 are fixedly connected to the baffle 40 by bolts. The two screw rods 22 are fixedly connected to the limiting ring 39 for limiting the baffle 40; when the two screw rods 22 slide to both sides, the sliding rod 23 can increase the stability of the two screw rods 22 and prevent the screw rods 22 from shaking.

[0077] Reference Figure 13 The steel bar pin 8 includes a cylindrical pin 9 and a tapered platform 11. The tapered platform 11 is fixedly connected to the top of the cylindrical pin 9 by bolts to guide the first pin hole 12 and the second pin hole 13. The outer wall of the cylindrical pin 9 is fixedly sleeved with multiple rings 10; the bridge 2 is placed on the top of the pier 1. During the downward movement of the bridge 2, the tapered platform 11 can guide the first pin hole 12 and the second pin hole 13, so that the multiple cylindrical pins 9 are respectively inserted into the first pin hole 12 and the second pin hole 13, and concrete is injected into the first pin hole 12 and the second pin hole 13 through the slurry hole 33 and the grouting hole 34. Since the outer wall of the cylindrical pin 9 is provided with multiple rings 10, the rings 10 can increase the contact area between the cylindrical pin 9 and the concrete, which is used to increase the stability of the cylindrical pin 9 and the bridge 2.

[0078] Reference Figure 14, two connecting rods 28 are fixedly passed through both sides of the top of the bridge 2, and connecting columns 41 are fixedly passed through both sides of the top of the bridge 2, and the connecting columns 41 are located between two adjacent connecting rods 28, and the bottom ends of the two connecting rods 28 on the same side are fixedly connected to the tops of the corresponding diagonal bracing beams 36 by bolts, and the bottom ends of the connecting columns 41 are fixedly connected to the top of the top block 35 by bolts, and the top of the connecting column 41 is fixedly connected to the first bottom plate 42 by bolts, and both sides of the top of the first bottom plate 42 are fixedly connected to the guardrail 44 by bolts, and the top of the first bottom plate 42 is fixedly connected to the fixing column 43 located between the two guardrails 44 by bolts, and the fixing column 43 is fixedly connected to the two guardrails 44 by bolts, and the top of the connecting rod 28 is fixedly connected to the bottom of the guardrail 44 The two ends of the bridge 2 are fixedly connected by bolts, and the bottom of the guardrail 44 on the side away from the fixing column 43 is fixedly connected to the second bottom plate 45 by bolts. The bottom of the second bottom plate 45 is fixedly connected to the fixing rod 46 by bolts, and the bottom end of the fixing rod 46 is fixedly connected to the bridge 2; after the pier 1 and the bridge 2 are installed, the connecting rod 28 and the connecting column 41 are inserted into the two sides of the bridge 2, so that the connecting rod 28 and the connecting column 41 are fixedly connected to the top of the diagonal bracing beam 36 and the top block 35 respectively. The second bottom plate 45 fixes the cylindrical pin 9 to the bridge 2 again through the fixing rod 46, and then the guardrail 44 is fixedly connected to the top of the first bottom plate 42 and the second bottom plate 45 for protection. At the same time, the protection capability of the guardrail 44 can be increased by the connecting rod 28, the connecting column 41 and the fixing column 43.

[0079] A construction method for an assembled UHPC composite beam bridge comprises the following steps:

[0080] S1. First, concrete is laid on the top of the pier 1 and the bottom inner wall of the T-slot 38. The bridge 2 is hoisted to the top of the pier 1 by a crane. The first pin hole 12 and the second pin hole 13 can be aligned with the cylindrical pin 9. The bridge 2 is placed on the top of the pier 1. During the downward movement of the bridge 2, the conical platform 11 can guide the first pin hole 12 and the second pin hole 13, so that multiple cylindrical pins 9 are respectively inserted into the first pin hole 12 and the second pin hole 13. At this time, the T-block 37 just docks with the T-slot 38, and the pier 1 and the bridge 2 are preliminarily connected by concrete. The cooperation of the T-block 37 and the T-slot 38 can increase the contact area between the pier 1 and the bridge 2, increase the contact area of the concrete on the pier 1 and the bridge 2, and make the connection between the pier 1 and the bridge 2 more stable.

[0081] S2. When two adjacent bridges 2 are placed on the pier 1, one end of the diagonal bracing beam 36 can be just connected to the top side of the upper retaining base 5. When the bridge 2 is subjected to pressure, the bridge 2 can not only share the pressure to the two ends in contact with the pier 1, but also transmit the pressure to the upper retaining base 5 through the cooperation of the top block 35 and the diagonal bracing beam 36, which can then be used to apply an oblique downward force to the upper retaining base 5. The upper retaining base 5 can then transmit the force to the side of the pier 1, thereby transmitting the pressure on the bridge 2 to different positions on the pier 1. This not only increases the direction of pressure transmission of the bridge 2 to achieve the stability of the bridge 2, but also transmits the pressure of the bridge 2 to different positions of the pier 1, which can disperse the pressure on the pier 1 and increase the stability of the pier 1.

[0082] S3. When two adjacent bridges 2 are placed on the pier 1, the rotating sleeve 19 is rotated by cooperating with the hexagonal wrench and the hexagonal block 20. Since the slider 25 slides with the chute 15, as the rotating sleeve 19 rotates, the screw 22 drives the disc 24 and the slider 25 through the through hole 14 to extend into the connecting hole 16. Then, the rotating sleeve 19, the screw 22, the disc 24 and the slider 25 are rotated as a whole, so that the slider 25 and the chute 15 are staggered. Then, the U-shaped baffle 30 is extended into the connecting hole 16. At this time, the U-shaped baffle The plate 30 collides with the side of the disc 24 close to the rotating sleeve 19, and the disc 24 is blocked and limited by the U-shaped baffle 30. Due to the friction between the U-shaped baffle 30 and the disc 24, the rotating sleeve 19 is rotated in the opposite direction at this time, which can make the disc 24 move toward the rotating sleeve 19. The disc 24 presses the U-shaped baffle 30, and the U-shaped baffle 30 and the disc 24 are locked with each other, thereby increasing the stability of the U-shaped baffle 30 and the disc 24, and at the same time increasing the stability between the two adjacent bridges 2;

[0083] S4. When the two bridges 2 are placed on the pier 1, the first hook steel bars 26 and the second hook steel bars 27 are arranged alternately between the two bridges 2. At this time, the baffle 29 is inserted into the installation groove 6 between the two bridges 2, and the first hook steel bars 26 and the second hook steel bars 27 are surrounded by the two baffles 29. Then, concrete is poured between the two baffles 29. The concrete is injected into the first pin hole 12 and the second pin hole 13 through the slurry hole 33 and the grouting hole 34. Since the outer wall of the cylindrical pin 9 is provided with a plurality of rings 10, the contact area between the cylindrical pin 9 and the concrete can be increased through the rings 10, which is used to increase the stability of the cylindrical pin 9 and the bridge 2. In addition, after the concrete solidifies, the first hook steel bars 26 and the second hook steel bar 27 cooperate to wrap the concrete, further increasing the stability between the two bridges 2. Then, the screw rods 22 on both sides of the support block 18 are clamped by a wrench, and then the rotating sleeve 19 is driven to rotate by the hexagonal block 20 to release the friction between the disc 24 and the U-shaped baffle 30. The slider 25 is docked with the slide 15 again, and the rotating sleeve 19 is continued to be rotated. At this time, the screw rod 22 is clamped by the wrench and cannot rotate with the rotating sleeve 19. Therefore, the disc 24 is disengaged from the through hole 14, and the base 17, support block 18 and baffle 29 are removed. The two sides of the adjacent bridges 2 are fixedly connected by the side closing plate 7. At this time, an empty groove is formed between the two bridges 2 and the pier 1 for pouring concrete.

[0084] S5. After the pier 1 and the bridge 2 are installed, the connecting rods 28 and the connecting columns 41 are inserted into both sides of the bridge 2, and the connecting rods 28 and the connecting columns 41 are fixedly connected to the top of the diagonal bracing beam 36 and the top block 35, respectively. The second bottom plate 45 is fixed to the cylindrical pin 9 and the bridge 2 again by the fixing rod 46. Then, the guardrail 44 is fixedly connected to the top of the first bottom plate 42 and the second bottom plate 45 for protection. At the same time, the protective capability of the guardrail 44 can be enhanced by the connecting rods 28, the connecting columns 41 and the fixing columns 43.

[0085] S6. The concrete is C50 concrete. When dismantling, a high-pressure water gun can be used to conveniently remove the wet joints of the C50 concrete, thereby achieving the purpose of dismantling and reusing the bridge 2, the pier 1, and the first and second hook steel bars 26 and 27.

[0086] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. The embodiments of the present invention and the features therein can be combined with each other unless there is a conflict. Therefore, the scope of protection of the present invention shall be based on the scope of protection of the claims.

Claims

1. An assembled UHPC composite beam bridge, characterized in that: include: A plurality of bridge piers (1) and bridges (2), wherein the bridge pier (1) is located between two adjacent bridges (2) and is used to support the two adjacent bridges (2); the bottom of the bridge pier (1) is fixedly connected to two lower retaining bases (3); the bottom of the bridge pier (1) is fixedly connected to a plurality of anchor rods (4); a plurality of T-shaped slots (38) are provided on both sides of the top of the bridge pier (1); and a plurality of T-shaped blocks (37) matching the T-shaped slots (38) are fixedly connected on both sides of the bottom of the bridge (2) near the bridge pier (1); Two sets of first connection structures are respectively arranged on both sides of the top of the bridge pier (1) and are used to fix the bridge pier (1) and one end of the bridge (2) to prevent displacement between the bridge pier (1) and the bridge (2); A second connecting structure is provided on top of the bridge pier (1) and is used to connect two adjacent bridges (2), thereby further increasing the stability between the two bridges (2) and the bridge pier (1); The third connection structure is provided on both sides of the bridge (2) and is used to connect two adjacent bridges (2).

2. The assembled UHPC composite beam bridge according to claim 1, characterized in that: The first connection structure includes a plurality of steel pins (8) fixedly connected to one side of the top of the pier (1); a plurality of first pin holes (12) and second pin holes (13) are provided at the bottom of both sides of the bridge (2); and the first pin holes (12) and the second pin holes (13) are respectively matched with the steel pins (8); two adjacent first pin holes (12) and second pin holes (13) are connected through slurry holes (33) for allowing concrete in the second pin holes (13) to enter the first pin holes (12); and a grouting hole (34) for grouting is provided on one side of the second pin holes (13).

3. The assembled UHPC composite beam bridge according to claim 1, characterized in that: The second connection structure comprises a plurality of bases (17) fixedly connected to the top of the pier (1), the top of the base (17) is fixedly connected to a support block (18), a rotating sleeve (19) is rotatably connected to the support block (18), the rotating sleeve (19) is provided with positive and negative internal threads, the internal threads of the support block (18) are connected to two screw rods (22), the two screw rods (22) are respectively located on the positive and negative thread sections of the internal threads of the rotating sleeve (19), the end of the screw rod (22) away from the support block (18) is fixedly connected to a disk (24), the outer wall of the disk (24) is fixedly connected to a plurality of sliders (25), the support block (18) is provided with a groove (21), and the outer wall of the rotating sleeve (19) is fixedly provided with a hexagonal block (20) located in the groove (21); Both sides of the bridge (2) are provided with a plurality of through holes (14) that cooperate with the disc (24); the inner walls of the through holes (14) are fixedly connected with a plurality of slide grooves (15) that slidably cooperate with the slider (25); the disc (24) can be extended into the bridge (2) through the cooperation of the slide grooves (15) and the slider (25); a plurality of connecting holes (16) are provided in the bridge (2), and the connecting holes (16) are connected to the through holes (14) and the slide grooves (15); the inner diameter of the connecting holes (16) is larger than the inner diameter of the through holes (14).

4. The assembled UHPC composite beam bridge according to claim 1, characterized in that: The third connection structure comprises a plurality of first hook steel bars (26) and second hook steel bars (27) arranged on both sides of the bridge (2), and the first hook steel bars (26) and the second hook steel bars (27) are arranged in a staggered manner, the first hook steel bars (26) and the second hook steel bars (27) between two adjacent bridges (2) are matched, two mounting grooves (6) are provided on the sides of the two bridges (2) away from each other, and a baffle (29) is provided in the mounting groove (6) between the two adjacent bridges (2); when the two bridges (2) are placed on the pier (1), The first hook steel bars (26) and the second hook steel bars (27) between the two bridges (2) are arranged in an alternating manner. At this time, the baffle (29) is inserted into the installation groove (6) between the two bridges (2). The first hook steel bars (26) and the second hook steel bars (27) are surrounded by the two baffles (29). Then, concrete is poured between the two baffles (29). After the concrete solidifies, the first hook steel bars (26) and the second hook steel bars (27) cooperate to wrap the concrete, thereby further increasing the stability between the two bridges (2).

5. The assembled UHPC composite beam bridge according to claim 4, characterized in that: The bridge (2) is slidably connected with a plurality of U-shaped baffles (30) extending into the connection hole (16). The U-shaped baffles (30) are used to block the discs (24) and the discs (24). The top of the U-shaped baffle (30) is provided with a plurality of countersunk holes (31). Countersunk bolts (32) are provided in the countersunk holes (31). Two side closing plates (7) are provided between two adjacent bridges (2).

6. The assembled UHPC composite beam bridge according to claim 1, characterized in that: An upper retaining base (5) is fixedly sleeved on the outer wall of the pier (1); a plurality of top blocks (35) are fixedly connected to the bottom of the bridge (2); both sides of the top blocks (35) are fixedly connected to diagonal bracing beams (36); and one end of the diagonal bracing beam (36) away from the top blocks (35) is clamped to the upper retaining base (5).

7. The assembled UHPC composite beam bridge according to claim 3, characterized in that: The two screw rods (22) are slidably connected to the same slide rod (23), both ends of the slide rod (23) are fixedly connected to a baffle (40), and the two screw rods (22) are fixedly connected to a limiting ring (39) for limiting the baffle (40).

8. The assembled UHPC composite beam bridge according to claim 2, characterized in that: The steel bar pin (8) comprises a cylindrical pin (9) and a conical platform (11), wherein the conical platform (11) is fixedly connected to the top end of the cylindrical pin (9) for guiding the first pin hole (12) and the second pin hole (13), and the outer wall of the cylindrical pin (9) is fixedly sleeved with a plurality of circular rings (10).

9. The assembled UHPC composite beam bridge according to claim 1, characterized in that: Two connecting rods (28) are fixedly passed through both sides of the top of the bridge (2), and connecting columns (41) are fixedly passed through both sides of the top of the bridge (2), and the connecting columns (41) are located between two adjacent connecting rods (28), and the bottom ends of the two connecting rods (28) on the same side are fixedly connected to the top of the corresponding diagonal bracing beam (36), and the bottom ends of the connecting columns (41) are fixedly connected to the top of the top block (35), and the top of the connecting columns (41) is fixedly connected to the first bottom plate (42), and the top of the first bottom plate (42) is fixed on both sides. A guardrail (44) is connected, the top of the first bottom plate (42) is fixedly connected to a fixing column (43) located between the two guardrails (44), and the fixing column (43) is fixedly connected to the two guardrails (44), the top of the connecting rod (28) is fixedly connected to the bottom of the guardrail (44), the bottom of the side of the guardrail (44) away from the fixing column (43) is fixedly connected to the second bottom plate (45), the bottom of the second bottom plate (45) is fixedly connected to a fixing rod (46), and the bottom end of the fixing rod (46) is fixedly connected to the bridge (2).

10. A construction method for an assembled UHPC composite beam bridge, characterized in that: The following steps are involved: S1. First, concrete is laid on the top of the pier (1) and the bottom inner wall of the T-slot (38). The bridge (2) is hoisted to the top of the pier (1) by a crane. The first pin hole (12) and the second pin hole (13) can be aligned with the cylindrical pin (9). The bridge (2) is placed on the top of the pier (1). During the downward movement of the bridge (2), the conical platform (11) can guide the first pin hole (12) and the second pin hole (13), so that the multiple cylindrical pins (9) can be aligned with the first pin hole (12) and the second pin hole (13). The pin (9) is respectively inserted into the first pin hole (12) and the second pin hole (13). At this time, the T-shaped block (37) is just docked with the T-shaped slot (38), and the pier (1) and the bridge (2) are preliminarily connected through concrete. The cooperation between the T-shaped block (37) and the T-shaped slot (38) can increase the contact area between the pier (1) and the bridge (2), increase the contact area of the concrete on the pier (1) and the bridge (2), and make the connection between the pier (1) and the bridge (2) more stable. S2. When two adjacent bridges (2) are placed on the pier (1), one end of the diagonal bracing beam (36) can just be connected to the top side of the upper retaining base (5). When the bridge (2) is subjected to pressure, the bridge (2) can not only share the pressure to the two ends in contact with the pier (1), but also the pressure can be transmitted to the upper retaining base (5) through the cooperation of the top block (35) and the diagonal bracing beam (36), and the upper retaining base (5) can transmit the force to the side of the pier (1), and then can transmit the pressure on the bridge (2) to different positions on the pier (1). Not only does it increase the direction of pressure transmission of the bridge (2) to achieve the stability of the bridge (2), but it can also transmit the pressure of the bridge (2) to different positions of the pier (1), which can disperse the pressure on the pier (1) and increase the stability of the pier (1). S3. When two adjacent bridges (2) are placed on the pier (1), the rotating sleeve (19) is rotated by the cooperation of the hexagonal wrench and the hexagonal block (20). Since the slider (25) and the slide groove (15) are in sliding cooperation, as the rotating sleeve (19) rotates, the screw (22) drives the disc (24) and the slider (25) to extend through the through hole (14) into the connecting hole (16). Then, the rotating sleeve (19), the screw (22), the disc (24) and the slider (25) are rotated as a whole, so that the slider (25) and the slide groove (15) are staggered. Then, the U-shaped baffle (30) is extended into the connecting hole (16). At this time, The U-shaped baffle (30) contacts the side of the disc (24) close to the rotating sleeve (19), and the disc (24) is blocked and limited by the U-shaped baffle (30). Due to the friction between the U-shaped baffle (30) and the disc (24), the rotating sleeve (19) is rotated in the opposite direction at this time, so that the disc (24) can move toward the rotating sleeve (19), and the disc (24) presses the U-shaped baffle (30). The U-shaped baffle (30) and the disc (24) are mutually clamped, thereby increasing the stability of the U-shaped baffle (30) and the disc (24), and at the same time increasing the stability between the two adjacent bridges (2); S4. When two bridges (2) are placed on the pier (1), the first hook steel bar (26) and the second hook steel bar (27) between the two bridges (2) are arranged in an alternating manner. At this time, the baffle (29) is inserted into the installation groove (6) between the two bridges (2). The first hook steel bar (26) and the second hook steel bar (27) are surrounded by the two baffles (29). Then, concrete is poured between the two baffles (29). The concrete is injected into the first pin hole (12) and the second pin hole (13) through the slurry hole (33) and the grouting hole (34). Since the outer wall of the cylindrical pin (9) is provided with a plurality of rings (10), the contact area between the cylindrical pin (9) and the concrete can be increased by the rings (10), so as to increase the stability of the cylindrical pin (9) and the bridge (2). In addition, after the concrete solidifies, the first hook steel bar ( 26) and the second hook steel bar (27) cooperate to wrap the concrete, further increasing the stability between the two bridges (2), then the screw rods (22) on both sides of the support block (18) are clamped by a wrench, and then the rotating sleeve (19) is driven to rotate by the hexagonal block (20), thereby releasing the friction between the disc (24) and the U-shaped baffle (30), and the slider (25) is docked with the slide groove (15) again, and the rotating sleeve (19) is continued to rotate. At this time, the screw rod (22) is clamped by the wrench and cannot rotate with the rotating sleeve (19), so the disc (24) is disengaged from the through hole (14), and the base (17), the support block (18) and the baffle (29) are removed. The two sides of the adjacent two bridges (2) are fixedly connected by the side closing plate (7). At this time, an empty groove is formed between the two bridges (2) and the pier (1) for pouring concrete; S5. After the pier (1) and the bridge (2) are installed, the connecting rods (28) and the connecting columns (41) are inserted into both sides of the bridge (2), so that the connecting rods (28) and the connecting columns (41) are fixedly connected to the top of the diagonal bracing beam (36) and the top block (35) respectively. The second bottom plate (45) fixes the cylindrical pin (9) to the bridge (2) again through the fixing rod (46). Then, the guardrail (44) is fixedly connected to the top of the first bottom plate (42) and the second bottom plate (45) for protection. At the same time, the protective capability of the guardrail (44) can be increased by the connecting rods (28), the connecting columns (41) and the fixing columns (43); S6. The concrete is C50 concrete. When dismantling, a high-pressure water gun can be used to conveniently remove the wet joints of the C50 concrete, thereby achieving the purpose of dismantling and reusing the bridge (2), the pier (1), the first hook steel bar (26), and the second hook steel bar (27).

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