Common concrete-coarse aggregate ultra-high performance concrete bridge deck
By setting wet joints and cast-in-place grooves on both sides of the precast bridge deck, combined with reserved holes and rubber plugs, the problems of complex construction and poor durability of ordinary concrete bridge decks are solved, and a bridge deck structure with high strength and good crack resistance is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUHAN MUNICIPAL ENG DESIGN & RES INST
- Filing Date
- 2025-05-26
- Publication Date
- 2026-04-28
AI Technical Summary
The reinforcement structure at wet joints of ordinary concrete bridge decks is complex, making construction cumbersome and prone to cracking. Furthermore, the sealing of pre-reserved formwork holes is not easy to achieve, affecting construction efficiency and structural durability.
Wet joints are set on both sides of the precast bridge deck, and coarse aggregate ultra-high performance concrete is poured on site. Combined with cast-in-place grooves and reserved holes, rubber plugs are used to seal the holes. The steel bars extend into the wet joints. The structure is simple and has strong crack resistance.
It achieves the integral formation of the bridge deck, with high structural strength, good crack resistance, simple construction, and superior economy, thus improving construction efficiency and durability.
Smart Images
Figure CN224173195U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of municipal road and bridge technology, and in particular to a high-performance concrete bridge deck made of ordinary concrete and coarse aggregate. Background Technology
[0002] The reinforcement structure at wet joints of ordinary concrete (NC) bridge decks is complex, making construction cumbersome and affecting construction efficiency. Furthermore, wet joints are prone to cracking during operation, impacting bridge durability and structural safety. The pre-reserved formwork holes during the prefabrication of ordinary concrete (NC) bridge decks should not be sealed, and sealing them is difficult to achieve a tight seal, affecting structural durability.
[0003] There are two main optimization methods for ordinary concrete (NC) bridge decks: increasing the amount of steel reinforcement at wet joints and using ultra-high performance concrete (UHPC) to pour wet joints. Increasing the amount of steel reinforcement at wet joints of ordinary concrete (NC) bridge decks leads to a large number of steel bars during construction, making construction cumbersome and affecting construction efficiency. On the other hand, simply using UHPC to pour wet joints of bridge decks is a better method with a simpler structure, but UHPC is expensive, resulting in high construction costs and poor economic efficiency. Summary of the Invention
[0004] The technical problem to be solved by this utility model is to provide a bridge deck and bridge surface made of ordinary concrete-coarse aggregate ultra-high performance concrete, which addresses the shortcomings of the prior art.
[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a bridge deck of ordinary concrete-coarse aggregate ultra-high performance concrete, including a precast bridge deck made of ordinary concrete, wet joints for on-site casting of coarse aggregate ultra-high performance concrete are respectively provided on both sides of the precast bridge deck, a cast-in-place groove is provided through the precast bridge deck, steel bars are provided inside the precast bridge deck, and the steel bars extend along both sides of the precast bridge deck into the wet joints, and a plurality of reserved holes are provided at intervals on the inner side of the edge of the wet joints on the precast bridge deck, and matching rubber plugs are provided in the reserved holes.
[0006] The beneficial effects of this utility model are as follows: The ordinary concrete-coarse aggregate ultra-high performance concrete bridge deck of this utility model has wet joints set on both sides of the precast bridge deck for casting multiple precast bridge decks into a whole on site. At the same time, cast-in-place grooves are set for casting the precast bridge deck and the shear studs on the steel beam below on site, so that the bridge deck and the steel beam form a whole. The reserved holes facilitate the arrangement of templates for casting the wet joints on site. With the help of rubber plugs, the reserved holes can be easily sealed after the on-site construction is completed. The bridge deck has a simple structure, high structural strength, strong crack resistance, good durability, and good economy, and has good market promotion and application prospects.
[0007] Based on the above technical solution, the present invention can be further improved as follows:
[0008] Furthermore, the edges of the prefabricated bridge deck are vertically arranged.
[0009] The beneficial effect of the above-mentioned further solution is that by setting the edges of the prefabricated bridge deck vertically, it is convenient to prefabricate in the factory and hoist on site, thus shortening the construction period.
[0010] Furthermore, the wet joints are constructed on-site using coarse aggregate ultra-high performance concrete.
[0011] The beneficial effects of the above-mentioned further scheme are: using coarse aggregate ultra-high performance concrete for on-site casting can ensure the bonding strength of two adjacent precast bridge decks, resulting in high structural strength and strong crack resistance.
[0012] Furthermore, the edges of the wet joints and the cast-in-place grooves are set vertically.
[0013] The beneficial effect of the above-mentioned further solution is that by setting the edges of the wet joint and the cast-in-place trench vertically, on-site hoisting construction can be facilitated.
[0014] Furthermore, the prefabricated bridge deck is provided with multiple reserved holes at intervals 20-30cm inside the edge of the wet joint.
[0015] The beneficial effects of the above-mentioned further solution are: by setting multiple reserved holes in the precast bridge deck, it is convenient to set the formwork for the on-site pouring of the wet joint, thus ensuring construction quality and construction safety.
[0016] Furthermore, the lateral spacing of the reserved holes is 0.8-1.0m, and the diameter of the upper end of the reserved holes is 2.0-3.0cm.
[0017] Furthermore, the bottom diameter of the reserved hole gradually decreases.
[0018] The beneficial effect of the above-mentioned further solution is that by setting the bottom diameter of the reserved hole to gradually decrease, the rubber plug will not fall out from the bottom of the reserved hole, which facilitates the subsequent fixing of the cast-in-place formwork.
[0019] Furthermore, the rubber stopper is spherical, and the diameter of the rubber stopper is located between the diameter of the upper port and the diameter of the lower port of the reserved hole.
[0020] The beneficial effects of the above-mentioned further solution are: setting the rubber stopper to a spherical shape facilitates insertion and removal, and the diameter of the rubber stopper is located between the diameter of the upper end and the diameter of the lower end of the reserved hole, which can prevent the rubber stopper from falling out from the bottom of the reserved hole.
[0021] Further: The reinforcing bars extending into the wet joint are arranged in a straight line.
[0022] The beneficial effect of the above-mentioned further solution is that by setting the reinforcing bars extending into the wet joint in a straight line, it is convenient for on-site construction and can also ensure the overall structural strength after the cast-in-place concrete is poured.
[0023] This utility model also provides a conventional concrete-coarse aggregate ultra-high performance concrete bridge deck, comprising multiple conventional concrete-coarse aggregate ultra-high performance concrete bridge decks, wherein the wet joints of two adjacent conventional concrete-coarse aggregate ultra-high performance concrete bridge decks are overlapped on one side and are bonded together as a whole by cast-in-place aggregate ultra-high performance concrete, and the reinforcing bars in the wet joints of two adjacent conventional concrete-coarse aggregate ultra-high performance concrete bridge decks are staggered. Attached Figure Description
[0024] Figure 1 This is a structural schematic diagram of a conventional concrete-coarse aggregate ultra-high performance concrete bridge deck according to an embodiment of the present invention.
[0025] Figure 2 This is a schematic diagram of the structure after the wet joint of this utility model has been poured.
[0026] Figure 3 This is a schematic diagram of the construction mold and rubber stopper according to an embodiment of the present invention.
[0027] The attached diagram lists the components represented by each number as follows:
[0028] 1. Precast bridge deck, 2. Wet joint, 3. Cast-in-place groove, 4. Reserved hole, 5. Reinforcing steel, 6. Construction mold, 7. Rubber plug. Detailed Implementation
[0029] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.
[0030] like Figure 1 and Figure 2As shown, a type of ordinary concrete-coarse aggregate ultra-high performance concrete bridge deck includes a precast bridge deck 1 made of ordinary concrete. Wet joints 2 for on-site casting of coarse aggregate ultra-high performance concrete are provided on both sides of the precast bridge deck 1. A cast-in-place groove 3 is provided through the precast bridge deck 1. Reinforcing bars 5 are provided inside the precast bridge deck 1, extending along both sides of the precast bridge deck 1 into the wet joints 2. Multiple reserved holes 4 are spaced at intervals on the inner edge of the wet joints 2 on the precast bridge deck 1. The reserved holes 4 are used to install supporting reinforcing bars for the bottom formwork during the casting of the wet joints 2. Matching rubber plugs 7 are placed inside the reserved holes 4.
[0031] This utility model relates to a conventional concrete-coarse aggregate ultra-high performance concrete bridge deck. By setting wet joints 2 on both sides of the precast bridge deck 1, it is convenient to cast multiple precast bridge decks 1 together on site to form a whole. At the same time, a cast-in-place groove 3 is set for the on-site casting of the precast bridge deck 1 and the shear studs on the lower crossbeam, so that the bridge deck and the steel beam form a whole. By setting a reserved hole 4, it is convenient to arrange the template during the on-site casting of the wet joint 2. With the help of rubber plugs 7, it is convenient to seal the reserved hole 4 after the on-site construction is completed. The bridge deck has a simple structure, high structural strength, strong crack resistance, good durability, and good economy, and has good market promotion and application prospects.
[0032] In one or more embodiments of this utility model, the edges of the prefabricated bridge deck 1 are vertically arranged. By making the edges of the prefabricated bridge deck 1 vertically arranged, it is convenient for factory prefabrication and on-site hoisting construction.
[0033] In one or more embodiments of this utility model, the wet joint 2 is constructed by on-site casting of coarse aggregate ultra-high performance concrete. Using coarse aggregate ultra-high performance concrete for on-site casting ensures the bonding strength between adjacent precast bridge deck panels 1, resulting in high structural strength and strong crack resistance.
[0034] In one or more embodiments of this utility model, the edges of the wet joint 2 and the cast-in-place groove 3 are vertically arranged. By vertically arranging the edges of the wet joint 2 and the cast-in-place groove 3, construction can be facilitated, and the overall structural strength after cast-in-place is ensured.
[0035] In practice, wet joint 2 is cast in place using coarse aggregate ultra-high performance concrete (UHPC), and cast-in-place groove 3 is also cast in place using coarse aggregate ultra-high performance concrete (UHPC).
[0036] Optionally, in one or more embodiments of this utility model, a plurality of reserved holes 4 are provided at intervals on the precast bridge deck 1 at a distance of 20-30 cm from the inner edge of the wet joint 2. By providing a plurality of reserved holes 4 on the precast bridge deck 1, it is convenient to set the formwork during on-site pouring of the wet joint 2, ensuring construction quality and construction safety. More preferably, a plurality of reserved holes 4 are provided at intervals on the precast bridge deck 1 at a distance of 25 cm from the inner edge of the wet joint 2.
[0037] In one or more embodiments of this utility model, the lateral spacing of the reserved holes 4 is 0.8-1.0m, and the diameter of the upper port of the reserved holes 4 is 2.0-3.0cm. In this embodiment, the diameter of the upper port of the reserved holes 4 is preferably 2.5cm.
[0038] Optionally, in one or more embodiments of this utility model, the bottom diameter of the reserved hole 4 gradually decreases. By setting the bottom diameter of the reserved hole 4 to gradually decrease, it is ensured that the rubber plug 7 will not fall out from the bottom of the reserved hole 4, which facilitates the subsequent fixing of the cast-in-place formwork.
[0039] In one or more embodiments of this utility model, the rubber stopper 7 is spherical, and the diameter of the rubber stopper 7 is located between the diameter of the upper port and the diameter of the lower port of the reserved hole 4. Setting the rubber stopper 7 as spherical facilitates insertion and removal, and the fact that the diameter of the rubber stopper 7 is located between the diameter of the upper port and the diameter of the lower port of the reserved hole 4 prevents the rubber stopper 7 from falling out from the bottom of the reserved hole 4.
[0040] In practice, the diameter of the reserved hole 4 gradually decreases from 2.5cm to 1.5cm within a 2cm range at the lower end, while the diameter of the rubber plug 7 is preferably 2cm. After the wet joint 2 is poured and the formwork is removed, the rubber plug 7 sealing the reserved hole 4 on the precast bridge deck 1 is inserted into the bottom of the reserved hole 4 on the precast bridge deck 1 through the construction mold 6 of the reserved hole 4 on the precast bridge deck 1, and then the reserved hole 4 is grouted and restored using grouting material.
[0041] It should be noted that, in practice, the construction mold 6 for the pre-drilled holes 4 on the precast bridge deck 1 is a T-shaped round steel bar, such as... Figure 3 As shown, the steel rods used for drilling the pre-reserved holes 4 on the precast bridge deck 1 have a standard diameter of 2.5 cm, with the diameter gradually decreasing to 1.5 cm within a 2 cm radius from the bottom. During the construction of the precast bridge deck 1, the construction mold 6 is tied to the pre-reserved holes 4 on the precast bridge deck 1, and a release agent is applied to the mold 6. After the concrete bridge deck is poured and formed, the mold 6 is removed, thus completing the pre-reserved holes 4 on the precast bridge deck 1.
[0042] In one or more embodiments of this utility model, the reinforcing bars 5 extending into the wet joint 2 are arranged in a straight line. By arranging the reinforcing bars 5 extending into the wet joint 2 in a straight line, on-site construction can be facilitated, and the overall structural strength after cast-in-place concrete can be guaranteed.
[0043] In this embodiment of the present invention, the reinforcing bars 5 are provided in two layers, which are crisscrossed and are made of HRB400 steel. The reinforcing bars located on both sides of the precast bridge deck 1 extend into the wet joint 2.
[0044] This utility model also provides a conventional concrete-coarse aggregate ultra-high performance concrete bridge deck, comprising multiple conventional concrete-coarse aggregate ultra-high performance concrete bridge decks, wherein the wet joints 2 of two adjacent conventional concrete-coarse aggregate ultra-high performance concrete bridge decks are overlapped on one side and are bonded together as a whole by cast-in-place aggregate ultra-high performance concrete, and the reinforcing bars 5 in the wet joints 2 of two adjacent conventional concrete-coarse aggregate ultra-high performance concrete bridge decks are staggered.
[0045] This invention uses coarse aggregate ultra-high performance concrete for the construction of wet joints 2 and cast-in-place grooves 3. By utilizing high-strength materials, the construction of wet joints in precast bridge decks is simplified, solving the problem of complex construction of wet joints in traditional ordinary concrete bridge decks. This improves the crack resistance of wet joints and cast-in-place grooves in precast bridge decks, enhances the durability of the bridge deck, and solves the problem of easy cracking in wet joints and grooves of traditional ordinary concrete bridge decks. The coarse aggregate ultra-high performance concrete can meet the structural requirements and has a lower cost than other ultra-high performance concrete materials, improving the economic efficiency of the structure. The use of precast bridge deck pre-reserved hole construction molds and pre-reserved hole sealing rubber plugs facilitates the precast construction of bridge decks and the subsequent restoration of pre-reserved holes.
[0046] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A type of ordinary concrete-coarse aggregate ultra-high performance concrete bridge deck, characterized in that: The bridge deck includes a precast bridge deck (1) made of ordinary concrete. Wet joints (2) for casting coarse aggregate ultra-high performance concrete on both sides of the precast bridge deck (1) are provided. A cast-in-place slot (3) is provided through the precast bridge deck (1). Reinforcing bars (5) are provided inside the precast bridge deck (1), and the reinforcing bars (5) extend along both sides of the precast bridge deck (1) into the wet joints (2). Multiple reserved holes (4) are provided at intervals on the inner side of the edge of the wet joints (2) on the precast bridge deck (1), and matching rubber plugs (7) are provided in the reserved holes (4).
2. The ordinary concrete-coarse aggregate ultra-high performance concrete bridge deck according to claim 1, characterized in that: The edges of the prefabricated bridge deck (1) are set vertically.
3. The ordinary concrete-coarse aggregate ultra-high performance concrete bridge deck according to claim 1, characterized in that: The wet joint (2) is constructed on-site using coarse aggregate ultra-high performance concrete.
4. The ordinary concrete-coarse aggregate ultra-high performance concrete bridge deck according to claim 1, characterized in that: The edges of the wet joint (2) and the cast-in-place groove (3) are set vertically.
5. The ordinary concrete-coarse aggregate ultra-high performance concrete bridge deck according to claim 1, characterized in that: The precast bridge deck (1) has a plurality of reserved holes (4) spaced 20-30cm inside the edge of the wet joint (2).
6. The ordinary concrete-coarse aggregate ultra-high performance concrete bridge deck according to claim 5, characterized in that: The lateral spacing of the reserved holes (4) is 0.8-1.0m, and the upper diameter of the reserved holes (4) is 2.0-3.0cm.
7. The ordinary concrete-coarse aggregate ultra-high performance concrete bridge deck according to claim 6, characterized in that: The bottom diameter of the reserved hole (4) gradually decreases.
8. The ordinary concrete-coarse aggregate ultra-high performance concrete bridge deck according to claim 6, characterized in that: The rubber stopper (7) is spherical, and the diameter of the rubber stopper (7) is located between the diameter of the upper port and the diameter of the lower port of the reserved hole (4).
9. The ordinary concrete-coarse aggregate ultra-high performance concrete bridge deck according to any one of claims 1-8, characterized in that: The reinforcing bars (5) extending into the wet joint (2) are arranged in a straight line.
10. A type of ordinary concrete-coarse aggregate ultra-high performance concrete bridge deck, characterized in that: The bridge deck includes multiple ordinary concrete-coarse aggregate ultra-high performance concrete bridge decks according to any one of claims 1-9, wherein the wet joints (2) of two adjacent ordinary concrete-coarse aggregate ultra-high performance concrete bridge decks are overlapped on one side of each other and are bonded together as a whole by cast-in-place aggregate ultra-high performance concrete, and the reinforcing bars (5) in the wet joints (2) of two adjacent ordinary concrete-coarse aggregate ultra-high performance concrete bridge decks are staggered.