Modularized and recycled cavity UHPC simply-supported traffic bridge and disassembly and assembly method of modularized and recycled cavity UHPC simply-supported traffic bridge

Abstract

The invention discloses a modular recycling cavity UHPC simply supported traffic bridge and a dismounting and mounting method thereof. The dismounting and mounting method comprises the following steps that A, cavity UHPC bridge deck slab standard parts are prefabricated; b, bailey beam standard parts are prefabricated; c, quickly assembling the simply-supported traffic bridge: assembling a plurality of sections of prefabricated Bailey beams, erecting the prefabricated Bailey beams on pile foundations to form a Bailey beam bridge foundation, and then hoisting prefabricated cavity UHPC bridge deck slabs section by section; d, quickly disassembling the simply supported traffic bridge: after the traffic task is completed, reversely operating to sequentially disassemble the multiple sections of prefabricated cavity UHPC bridge deck slabs and the multiple sections of prefabricated bailey beams for next turnover and recycling; through the use of the prefabricated cavity UHPC bridge deck slab, the overall weight of the bridge is reduced by about half, the thickness is reduced, transportation is convenient, the prefabricated cavity UHPC bridge deck slab is suitable for rapid construction of temporary traffic trestles, emergency rescue and traffic keeping bridges, and the purposes of rapid construction, rapid disassembly and cyclic and repeated emergency use are achieved.

Description

Technical Field

[0001] The present invention belongs to the field of bridge engineering and construction technology, and particularly relates to a modular, recyclable cavity UHPC simply supported traffic bridge and a rapid assembly and disassembly method thereof. The bridge is suitable for scenarios such as temporary wading bridges and temporary traffic trestles, and can also be used as a temporary bridge for emergency clearance and traffic maintenance. Background Art

[0002] During urban road construction, simple temporary bridges, also known as traffic bridges, are often needed to ensure smooth traffic flow. Currently, these bridges are primarily constructed from assembled steel components topped with conventional concrete. These bridges have weak load-bearing capacity, and their on-site casting leads to low construction efficiency and high maintenance costs. This is especially true near residential areas with high traffic volume, where traffic noise is significant. Given these issues, there is a pressing need to improve the performance of traffic bridges in various aspects of their construction.

[0003] UHPC (Ultra-High Performance Concrete) is a cement-based engineering material with extremely high strength and excellent durability. Its compressive strength is typically above 150 MPa and can even reach over 200 MPa, more than six times that of ordinary concrete. UHPC is composed of silica fume, cement, water-reducing agent, fine aggregate, and steel fiber. It is constructed using the principle of high density to reduce internal pores and microcracks, thereby improving the overall performance of the material.

[0004] Therefore, it is very necessary to combine ultra-high performance concrete to develop a traffic bridge that is easy to construct, economical, durable, and green and environmentally friendly. Summary of the Invention

[0005] The present invention aims to provide a modular, recyclable, hollow UHPC simply supported traffic bridge and its disassembly and assembly method. While meeting the basic functions of a traffic bridge, the present invention is characterized by durability, light weight, high strength, simple and convenient assembly, multiple turnover and recycling, and the ability to significantly reduce operating noise. The present invention is a large-scale temporary structure that is environmentally friendly, simple to construct, economical, and durable. The technical solutions adopted to achieve the above-mentioned objectives are:

[0006] A modular reusable cavity UHPC simply supported traffic bridge disassembly and assembly method includes the following steps:

[0007] Step A: Prefabricate standard hollow UHPC bridge deck components: Support and cast the formwork in the factory, then tie the steel bars, reserve a cavity inside the bridge deck, reserve the first bolt holes that penetrate up and down at the corresponding positions, and then pour the ultra-high performance concrete to form the shape;

[0008] Step B: Prefabricate Bailey beam standard components: prefabricate Bailey plates in the factory, and then assemble multiple Bailey plates into Bailey beams;

[0009] Step C: Rapid assembly of the simply supported traffic bridge: The required multiple sections of prefabricated cavity UHPC bridge decks and multiple sections of prefabricated Bailey beams are transported to the construction site. First, the multiple sections of prefabricated Bailey beams are assembled and erected on pile foundations to form a Bailey beam foundation. Then, the prefabricated cavity UHPC bridge decks are hoisted section by section and laid on the Bailey beam foundation in sequence along the longitudinal direction of the bridge. Second bolt holes corresponding to the first bolt holes are provided on the Bailey beam foundation. The prefabricated cavity UHPC bridge decks are fixedly connected to the Bailey beam foundation by high-strength bolts, and the high-strength bolts are threadedly connected to the first bolt holes and the second bolt holes.

[0010] Step D: Rapid disassembly of the simply supported traffic bridge: After completing the traffic task, the reverse operation is performed to dismantle and ship the multiple sections of prefabricated cavity UHPC bridge deck and the multiple sections of prefabricated Bailey beams in sequence for the next turnover cycle.

[0011] Preferably, in step A, a cavity is prefabricated inside the bridge deck by using a rubber inflatable core mold, and reinforcement is carried out during the pouring of ultra-high performance concrete. High-alloy threaded hole sleeves are embedded in the first bolt hole and the second bolt hole, and connecting steel plates with bolt holes are pre-embedded at the upper and lower ends of the first bolt hole, i.e., the top and bottom surfaces of the simply supported traffic bridge.

[0012] Preferably, in step A, a cavity is prefabricated inside the bridge deck by using a non-removable wooden formwork or a foam plastic formwork.

[0013] Preferably, steel fibers or basalt fibers are added during the pouring of ultra-high performance concrete.

[0014] Preferably, the cavity of the simply supported traffic bridge is filled with lightweight sound-absorbing material.

[0015] A modular, recyclable, cavity UHPC simply supported traffic bridge as described above comprises a plurality of prefabricated Bailey beams and a plurality of prefabricated cavity UHPC bridge decks, wherein the prefabricated Bailey beams are assembled from a plurality of Bailey sheets, the plurality of prefabricated Bailey beams are interconnected and fixedly connected to pile foundations to form a Bailey beam foundation, the plurality of prefabricated cavity UHPC bridge decks are sequentially laid on the Bailey beam foundation, and the prefabricated cavity UHPC bridge decks are fixedly connected to the Bailey beam foundation by high-strength bolts.

[0016] Preferably, the thickness of the prefabricated cavity UHPC bridge deck is not less than 20 cm, the thickness of the upper and lower walls of the cavity is not less than 5 cm, and the cavity spacing does not exceed 50 cm.

[0017] Preferably, mounting connection structures for installing bridge railings are provided at both ends of the prefabricated cavity UHPC bridge deck, i.e., at both sides of the simply supported traffic bridge.

[0018] The beneficial effects of the present invention are as follows: (1) By using prefabricated cavity UHPC bridge panels, the present invention reduces the overall weight of the bridge by about half, reduces the thickness, and facilitates transportation. It is suitable for the rapid construction of temporary traffic trestles, emergency bridges, and bridges for maintaining traffic.

[0019] (2) The hollow UHPC simply supported traffic bridge of the present invention has high bearing capacity, high strength, and high durability. The UHPC material is dense, does not crack, and has strong corrosion resistance. It can be used in water, ocean and other environments.

[0020] (3) The present invention prefabricates standard parts of cavity UHPC bridge panels in the factory, and assembles each prefabricated cavity UHPC bridge panel on site on the Bailey beam using high-strength bolts, thereby meeting the goals of rapid construction, rapid disassembly, and repeated emergency use.

[0021] (4) The present invention reduces the single-use cost of existing simply supported traffic bridges. By prefabricating and hoisting, it improves construction efficiency and significantly reduces the noise generated by on-site construction of simply supported traffic bridges, overcoming the shortcomings of traditional steel structure simply supported traffic bridges, such as high construction and maintenance costs, low construction efficiency, and high operating noise.

[0022] (5) Use UHPC ultra-high performance concrete instead of ordinary concrete to meet the load-bearing and durability requirements; at the same time, the cavity UHPC board can effectively reduce the bridge's own weight by about 30% to 40%, which can reduce the load-bearing requirements of bridge piers, foundations and Bailey beams, thereby increasing the life of simply supported traffic bridges and reducing maintenance costs.

[0023] (6) The air layer formed in the middle cavity of the prefabricated cavity UHPC bridge deck can block heat conduction and sound wave transmission, thereby improving the energy efficiency and acoustic comfort of the building.

[0024] (7) The bridge deck uses a cavity UHPC bridge deck, which can significantly reduce the noise generated by vehicles when driving compared to traditional steel structure traffic bridges. It is very suitable for the construction of traffic bridges near residential areas.

[0025] (8) The present invention is very suitable for scenes such as temporary bridges for wading and temporary traffic trestle, and can also be used as a temporary bridge for emergency clearance and traffic maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the three-dimensional structure of the cavity UHPC simply supported traffic bridge of the present invention;

[0027] Figure 2 for Figure 1 Schematic diagram of the middle cross section;

[0028] Figure 3 for Figure 1 Schematic diagram of the middle longitudinal section;

[0029] Figure 4 Schematic diagram of the structure of prefabricated cavity UHPC bridge deck. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the accompanying drawings.

[0031] like Figures 1 to 4 As shown, a modular recyclable cavity UHPC simply supported traffic bridge disassembly and assembly method includes the following steps:

[0032] Step A: Prefabricate the standard parts of the cavity UHPC bridge deck 2: Support and cast the formwork in the factory, then tie the steel bars, reserve a cavity inside the bridge deck, reserve the first bolt holes 6 that pass through from top to bottom at the corresponding positions, and then pour the ultra-high performance concrete to form the shape;

[0033] A cavity 3 is prefabricated inside the bridge deck using a rubber inflatable mandrel, and reinforcement 4 is provided during the pouring of ultra-high performance concrete. High-alloy threaded hole sleeves 6 are embedded in both the first and second bolt holes, and connecting steel plates 5 with bolt holes are pre-embedded at the upper and lower ends of the first bolt hole, i.e., the top and bottom surfaces of the simply supported traffic bridge.

[0034] Step B: Prefabricate Bailey beam standard parts: prefabricate Bailey plates in the factory, and then assemble multiple Bailey plates into Bailey beam 1;

[0035] Step C: Rapid assembly of the simply supported traffic bridge: The required multi-section prefabricated cavity UHPC bridge deck 2 and multi-section prefabricated Bailey beams 1 are transported to the construction site. First, the multi-section prefabricated Bailey beams 1 are assembled and erected on the pile foundation to form a Bailey beam bridge foundation. Then, the prefabricated cavity UHPC bridge deck 2 is hoisted section by section and laid on the Bailey beam bridge foundation in sequence along the longitudinal direction of the bridge. Second bolt holes corresponding to the first bolt holes are provided on the Bailey beam bridge foundation. The prefabricated cavity UHPC bridge deck 2 is fixedly connected to the Bailey beam bridge foundation by high-strength bolts, and the high-strength bolts are threadedly connected to the first bolt holes and the second bolt holes.

[0036] Step D: Rapid disassembly of the simply supported traffic bridge: After completing the traffic task, the multi-section prefabricated cavity UHPC bridge deck 2 and the multi-section prefabricated Bailey beam 1 are disassembled in reverse order to be used in the next turnover cycle.

[0037] In step A, a rubber inflatable core mold is used to pour the ultra-high performance concrete. After curing, the mold can be easily removed. Alternatively, a prefabricated cavity 3 can be created within the bridge deck using a non-removable wooden or foam plastic mold. Furthermore, other fibers, such as steel fiber or basalt fiber, can be incorporated into the ultra-high performance concrete during pouring to further enhance the deck's load-bearing capacity and durability.

[0038] like Figures 1 to 4As shown, a modular recyclable cavity UHPC simply supported traffic bridge as described above includes a multi-section prefabricated Bailey beam 1 and a multi-section prefabricated cavity UHPC bridge deck 2. The prefabricated Bailey beam 1 is assembled from a multi-section Bailey sheet. The multi-section prefabricated Bailey beams 1 are connected to each other and fixedly connected to the pile foundation to form a Bailey beam bridge foundation. The multi-section prefabricated cavity UHPC bridge deck 2 is laid on the Bailey beam bridge foundation in sequence. The prefabricated cavity UHPC bridge deck 2 is fixedly connected to the Bailey beam bridge foundation by high-strength bolts.

[0039] The cavity 3 of the simply supported traffic bridge is filled with light sound-absorbing material, thereby further reducing the noise generated by vehicles running, and is very suitable for the construction of traffic bridges near residential areas.

[0040] The present invention uses a prefabricated cavity UHPC bridge deck 2, which reduces the overall weight of the bridge by about half, reduces the thickness, and facilitates transportation. It is suitable for the rapid construction of temporary traffic trestles, emergency bridges, and bridges for maintaining traffic. The overall bearing capacity is high, the strength is high, and the durability is high. The UHPC material is dense, does not crack, and has strong corrosion resistance, and can be used in water, ocean and other environments.

[0041] The thickness of the prefabricated cavity UHPC bridge deck 2 is not less than 20 cm, the thickness of the upper and lower walls of the cavity 3 is not less than 5 cm, and the interval between the cavities 3 does not exceed 50 cm.

[0042] Installation connection structures for installing bridge railings are provided at both ends of the prefabricated cavity UHPC bridge deck 2, i.e., on both sides of the simply supported traffic bridge.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A modular and recyclable cavity UHPC simply supported traffic bridge disassembly and assembly method, characterized in that: The steps include: Step A: Prefabricate standard hollow UHPC bridge deck components: Support and cast the formwork in the factory, then tie the steel bars, reserve a cavity inside the bridge deck, reserve the first bolt holes that penetrate up and down at the corresponding positions, and then pour the ultra-high performance concrete to form the shape; Step B: Prefabricate Bailey beam standard components: prefabricate Bailey plates in the factory, and then assemble multiple Bailey plates into Bailey beams; Step C: Rapid assembly of the simply supported traffic bridge: The required multiple sections of prefabricated cavity UHPC bridge decks and multiple sections of prefabricated Bailey beams are transported to the construction site. First, the multiple sections of prefabricated Bailey beams are assembled and erected on pile foundations to form a Bailey beam foundation. Then, the prefabricated cavity UHPC bridge decks are hoisted section by section and laid on the Bailey beam foundation in sequence along the longitudinal direction of the bridge. Second bolt holes corresponding to the first bolt holes are provided on the Bailey beam foundation. The prefabricated cavity UHPC bridge decks are fixedly connected to the Bailey beam foundation by high-strength bolts, and the high-strength bolts are threadedly connected to the first bolt holes and the second bolt holes. Step D: Rapid disassembly of the simply supported traffic bridge: After completing the traffic task, the reverse operation is performed to dismantle and ship the multiple sections of prefabricated cavity UHPC bridge deck and the multiple sections of prefabricated Bailey beams in sequence for the next turnover cycle.

2. The disassembly and assembly method of the modular recyclable cavity UHPC simply supported traffic bridge according to claim 1 is characterized in that: In step A, a cavity is prefabricated inside the bridge deck by using a rubber inflatable core mold, and reinforcement is carried out during the pouring of ultra-high performance concrete. High-alloy threaded hole sleeves are embedded in the first bolt hole and the second bolt hole, and connecting steel plates with bolt holes are pre-embedded at the upper and lower ends of the first bolt hole, i.e., the top and bottom surfaces of the simply supported traffic bridge.

3. The method for disassembling and assembling a modular, recyclable cavity UHPC simply supported traffic bridge according to claim 1 is characterized in that: In step A, a cavity is prefabricated inside the bridge deck using a non-removable wooden formwork or foam plastic formwork.

4. The method for disassembling and assembling a modular, recyclable cavity UHPC simply supported traffic bridge according to claim 1 is characterized in that: Steel fibers or basalt fibers are added during the pouring of ultra-high performance concrete.

5. The method for disassembling and assembling a modular, recyclable cavity UHPC simply supported traffic bridge according to any one of claims 1 to 4, characterized in that: The cavity of the simply supported traffic bridge is filled with lightweight sound-absorbing material.

6. A modular recyclable cavity UHPC simply supported traffic bridge according to any one of claims 1 to 5, characterized in that: It includes multiple sections of prefabricated Bailey beams and multiple sections of prefabricated cavity UHPC bridge panels. The prefabricated Bailey beams are assembled from multiple sections of Bailey plates. The multiple sections of prefabricated Bailey beams are connected to each other and fixedly connected to pile foundations to form Bailey beam bridge foundations. The multiple sections of prefabricated cavity UHPC bridge panels are laid on the Bailey beam bridge foundations in sequence. The prefabricated cavity UHPC bridge panels are fixedly connected to the Bailey beam bridge foundations by high-strength bolts.

7. The modular recyclable cavity UHPC simply supported traffic bridge according to claim 6 is characterized in that: The thickness of the prefabricated cavity UHPC bridge deck shall not be less than 20cm, the thickness of the upper and lower walls of the cavity shall not be less than 5cm, and the cavity spacing shall not exceed 50cm.

8. The modular recyclable cavity UHPC simply supported traffic bridge according to claim 6 or 7, characterized in that: Installation connection structures for installing bridge railings are provided at both ends of the prefabricated cavity UHPC bridge deck, i.e., on both sides of the simply supported traffic bridge.

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