Semi-assembled self-balancing arch bridge based on corrugated steel

Abstract

The utility model belongs to the technical field of bridge engineering, and discloses a semi-assembled self-balancing arch bridge based on corrugated steel, which comprises a hollow bridge body box erected between two bases, and the bridge body box is filled with filling materials; the bridge body box comprises bridge head steel boxes located on a base, and a wave-shaped arch box is arranged between the two bridge head steel boxes. The filling material comprises a first filler and a second filler, the corrugated arch box is filled with the first filler, and the bridge head steel box is filled with the second filler; the wave-shaped arch box comprises a wave-shaped arch rib connected between the two bridgehead steel boxes, and the upper portion of the wave-shaped arch rib is filled with the first filler. According to the utility model, the rapid construction of a small-span bridge can be realized, the structure is a self-balancing system, and compared with the traditional stone arch bridge, the structure system has a wider application range and better environmental adaptability, and has the advantages of reliable performance, small influence on the environment, low manufacturing cost and the like, and compared with the traditional stone arch bridge, the requirement on the thrust resistance of the original foundation is strict.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bridge engineering technical field especially relates to a half assembly self -balancing arch bridge based on corrugated steel. BACKGROUND

[0002] Small span bridge has great use demand in city park and country lane, and occupies an important position in traffic network, and its construction efficiency and cost have important influence on traffic construction, traditional small span bridge mainly adopts the method of pouring reinforced concrete to build, but this construction method has problems of long construction period, difficult quality control, high comprehensive cost and the like.

[0003] The existing small span bridge is mainly constructed by using prefabricated components and assembly parts, but the prefabricated components have large volume and weight, and the hoisting and transportation difficulty and cost are higher, and the transportation difficulty and cost on the rugged country lane are further improved, meanwhile, the prefabricated component construction team has high requirement on construction site, and the site workload and work difficulty are additionally increased, the construction technology level is required to be high, additional dust and noise pollution are generated in the construction process, and the surrounding environment is affected, and the assembly bridge is a kind of green and standardized rapid construction technology, which has been paid more and more attention in recent years, but the bridge also has problems of poor integrity and insufficient durability in practical application, and the factory prefabricated mold is difficult to adapt to the complex and changeable site environment, and the cost is high when the demand does not reach a certain scale.

[0004] Therefore, the half assembly self -balancing arch bridge based on corrugated steel is designed to solve the above technical problems. CONTENT OF UTILITY MODEL

[0005] To solve the above technical problems, the utility model provides a half assembly self -balancing arch bridge based on corrugated steel, which can realize rapid construction of small span bridge, and has advantages of reliable performance, small environmental impact and low cost.

[0006] To achieve the above purpose, the utility model provides a half assembly self -balancing arch bridge based on corrugated steel, which is erected on symmetrically arranged bases and comprises a bridge body box erected between two bases and hollowed, and the bridge body box is filled with filling material;

[0007] The bridge body box comprises bridge head steel boxes arranged on the bases, and a corrugated arch box arranged between the two bridge head steel boxes and used for crossing a river channel, and the filling material is filled between the bridge head steel boxes and the corrugated arch box.

[0008] The filling material comprises first filling material and second filling material, the first filling material is filled in the corrugated arch box, and the second filling material is filled in the bridge head steel box.

[0009] The wave-shaped arch box comprises wave-shaped arch ribs connected between the two bridge head steel boxes, and the first filler is filled above the wave-shaped arch ribs.

[0010] Preferably, the bridge head steel box is hollow to form an arch foot box chamber, and the second filler is filled in the arch foot box chamber.

[0011] Preferably, the bottom end of the bridge head steel box is provided with a plurality of arrayed anti-skid structures abutting against the top surface of the base.

[0012] Preferably, the first filler comprises light-weight foam concrete, and the second filler comprises high-density filler.

[0013] Preferably, the base comprises graded gravel.

[0014] Preferably, the wave-shaped arch ribs are provided with side plates on two sides, the side plates are fixedly connected with the bridge head steel box, and the first filler is filled in the space surrounded by the wave-shaped arch ribs and the side plates.

[0015] Preferably, a bridge deck is laid between the two side plates and abuts above the first filler; the bridge deck extends to two sides and is connected with the original road surface, and the bridge deck is located at the top end of the wave-shaped arch box and abuts against the top end of the second filler.

[0016] Preferably, a partition baffle is arranged between the arch foot box chamber and the wave-shaped arch ribs to separate the first filler and the second filler.

[0017] Compared with the prior art, the utility model has the advantages and technical effects that the utility model discloses a semi-assembly self-balancing arch bridge based on wave-shaped steel, which is suitable for small-span bridge new construction and reconstruction projects with environmental protection requirements and tight construction period; the bridge structure of the utility model is convenient to reasonably design and customize the bridge box according to the field size, the bridge box is hollow, convenient to manufacture and transport, the bridge box is filled with filler materials, the filler materials in the bridge material box are all cheap materials, the manufacturing cost is low, and the adaptability is strong; in addition, the bridge structure of the utility model is prefabricated in the field, is manufactured in the field according to the design, is then transported to the specified area to be assembled and constructed, and then is filled, so that the construction speed is fast, the trouble of erecting formwork and support can be saved, manpower and material resources are saved, and the influence on the field environment is reduced; the structure of the utility model after construction has good integrity, has better durability compared with assembly buildings, and the structure is a self-balancing system, compared with the strict requirement of traditional stone arch bridges on the original foundation resistance, the structure system of the utility model has a wider application range and better environmental adaptability. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The embodiments of the application illustrated in the drawings are intended to explain the aspects of the present application and are not limiting of the present application. In the drawings:

[0019] Figure 1 It is the utility model based on the half assembly of corrugated steel self balancing arch bridge axial view;

[0020] Figure 2 It is the utility model based on the half assembly of corrugated steel self balancing arch bridge bottom view;

[0021] Figure 3 It is the utility model based on the half assembly of corrugated steel self balancing arch bridge plan view;

[0022] Figure 4 It is the utility model based on the half assembly of corrugated steel self balancing arch bridge main view structure schematic diagram;

[0023] Figure 5 It is the utility model anti -slip structure schematic diagram;

[0024] Figure 6 It is the utility model bridge box main view;

[0025] Figure 7 It is Figure 6 The section schematic diagram of A-A in middle;

[0026] Figure 8 It is Figure 6 The section schematic diagram of B-B in middle;

[0027] Figure 9 It is Figure 6 The section schematic diagram of C-C in middle;

[0028] Figure 10 It is the overhead structure schematic diagram of first filler and second filler

[0029] Figure 11 It is Figure 10 The section schematic diagram of D-D in middle;

[0030] Figure 12 It is the size schematic diagram of the utility model bridge box;

[0031] In the drawing: 1, corrugated arch rib; 2, bridge head steel box; 3, first filler; 4, second filler; 5, anti -slip structure; 6, graded broken stone; 7, bridge box; 8, bridge body auxiliary arch; 9, base; 10, arch foot box chamber; 11, bridge deck; 12, guardrail; 13, separation baffle. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0033] Small-span bridges are an important type in bridge engineering.

[0034] I. Definition and classification

[0035] Small-span bridges generally refer to bridges with small spans. Different standards exist for the specific span range. One view considers small-span bridges to be bridges with spans less than 12 meters, another view considers the span of small-span bridges to be below 10 meters, and still another view considers the span of small-span bridges to be below 3 meters. These different classification standards may be derived from different industry standards, regional differences, or engineering practice needs. Regardless, the main characteristics of small-span bridges are simple structure, convenient construction, and low cost.

[0036] II. Structural form

[0037] Small-span bridges usually adopt structural forms such as simple beams, reinforced concrete slab beams, straight beams, arch structures, cantilevers, or cantilever bridges. These structural forms have advantages such as convenient construction, low cost, and good seismic performance. In addition, small-span bridges may also adopt structural forms such as steel truss bridges and concrete beam bridges to meet different engineering needs.

[0038] III. Common types and applications

[0039] Pedestrian bridges: Pedestrian bridges are bridges designed specifically for pedestrians, usually located in parks, scenic areas, urban pedestrian streets, and other places. Small-span pedestrian bridges have simple structures and are convenient to construct, providing a safe and convenient way for pedestrians to pass through.

[0040] Pedestrian overpasses: Pedestrian overpasses are important channels connecting both sides of urban streets, usually located in bustling commercial areas, transportation hubs, and other places. Small-span pedestrian overpasses have advantages such as low cost and short construction period, and are an important part of urban transportation construction.

[0041] Other types: In addition to pedestrian bridges and pedestrian overpasses, small-span bridges also include structures such as culverts and drainage pipes. These structures have been widely used in urban roads, rural highways, and other places, providing strong support for smooth traffic flow.

[0042] IV. Characteristics and advantages

[0043] Simple structure: The structural form of small-span bridges is relatively simple, easy to construct and maintain. This reduces the difficulty and cost of the project, and improves the construction efficiency.

[0044] Low cost: Due to the simple structure and convenient construction, the cost of small-span bridges is relatively low. This makes small-span bridges have higher cost performance in traffic construction.

[0045] Good seismic performance: Small-span bridges usually adopt simple structural forms, which makes them have good seismic performance. In the event of natural disasters such as earthquakes, small-span bridges can maintain good stability and safety.

[0046] Five, development trend and prospect

[0047] With the acceleration of urbanization and the continuous growth of traffic demand, small-span bridges will play an increasingly important role in traffic construction. In the future, the development of small-span bridges will show the following trends:

[0048] Technological innovation: With the continuous progress of science and technology, the construction technology of small-span bridges will continue to innovate and improve. New construction methods and materials will continue to emerge, improving the construction efficiency and quality of small-span bridges.

[0049] Intelligent development: With the continuous development of intelligent transportation systems, small-span bridges will also gradually realize intelligent management. Through the installation of sensors, monitoring equipment and other intelligent facilities, the running state of the bridge and traffic flow can be monitored in real time, improving the safety and traffic efficiency of the bridge.

[0050] Environmental protection and sustainable development: Under the concept of environmental protection and sustainable development, the design and construction of small-span bridges will pay more attention to environmental protection and energy saving. The use of environmentally friendly materials and construction techniques will reduce the impact of bridges on the environment and achieve sustainable development.

[0051] In summary, small-span bridges play an important role in traffic construction. In the future, with the continuous progress of technology and the updating of concepts, small-span bridges will usher in a broader development prospect.

[0052] When designing, the rise-span ratio needs to be calculated, which is the ratio of the calculated rise S of the arch ring (or rib arch) in the arch bridge to the calculated span L (S / L), also known as the rise or the ratio of the net rise to the net span. It is used to represent the steepness of the arch, and is an important indicator reflecting the stress characteristics of the arch bridge. The following is a detailed explanation of the rise-span ratio:

[0053] I. Definition and calculation

[0054] Definition: The rise-span ratio is an important parameter in the structure of arch bridges, which reflects the steepness of the arch.

[0055] The rise is the vertical distance from the center of the crown section to the line connecting the centers of the two adjacent soffit sections, and the span is the horizontal distance between the two adjacent soffit section centers, i.e., the horizontal distance between the two ends of the arch axis.

[0056] II. Effects and roles

[0057] Influence on arch ring internal forces: Changes in the rise-span ratio directly affect the distribution of internal forces in the arch ring. Generally, when the rise-span ratio decreases, the thrust of the arch increases, and the axial force generated in the arch ring also increases, which is beneficial to the stress state of the arch ring but not to the pier foundation.

[0058] Influence on arch bridge structural form: The rise-span ratio not only affects the size of the internal forces in the arch ring but also influences the selection of the arch bridge's structural type and construction method. For example, arch bridges with a rise-span ratio less than 1 / 5 are called flat arches, and those with a rise-span ratio greater than or equal to 1 / 5 are called steep arches. The size of the rise-span ratio should be selected after comprehensive comparison during design.

[0059] Influence on construction method: When the rise-span ratio of the arch is too large, the arch foot section is too steep, making it difficult to lay bricks or pour concrete for the arch ring. Therefore, the influence of the rise-span ratio needs to be considered when selecting the construction method.

[0060] III. Applications and examples

[0061] In actual engineering, the selection of the rise-span ratio needs to be determined based on specific engineering conditions and design requirements. For example, in a vehicle cableway bridge, the rise-span ratio of the main cable must be less than 1 / 35 to meet the requirements of vehicle travel at the ends of the span. In an arch auxiliary beam bridge, a reasonable range of the rise-span ratio can be determined through analysis of dynamic and static characteristics.

[0062] In summary, the rise-span ratio is an important parameter in the design and construction of arch bridges, reflecting the degree of flatness or steepness of the arch and affecting the stress characteristics, structural form, and selection of construction methods of the arch bridge. In actual engineering, a reasonable rise-span ratio needs to be determined based on specific engineering conditions and design requirements.

[0063] The technical scheme of the utility model uses light-weight foam concrete, which is a new type of light-weight thermal insulation material. Here is a detailed introduction:

[0064] I. Definition and manufacturing process

[0065] Lightweight foam concrete is a new type of lightweight thermal insulation material containing a large number of closed pores, which is formed by fully foaming the foaming agent by the foaming system of the foaming machine, uniformly mixing the foam with the cement slurry, and then pouring and curing in situ or molding by the pumping system of the foaming machine. The production process generally involves mixing cement, water, foaming agent, foam stabilizer, and aggregate such as sand and fly ash in a certain proportion and fully stirring, and then transporting to the construction site for pouring and curing by special conveying equipment.

[0066] II. Main features

[0067] Lightweight and high strength: The dry volume weight of lightweight foam concrete is generally 180-300 kg / m 3 , which is about 1 / 10-1 / 3 of that of clay bricks, and it also has high strength to meet the load-bearing requirements.

[0068] Thermal insulation: Due to the large number of closed pores inside, lightweight foam concrete has excellent thermal insulation performance, low thermal conductivity, and can effectively reduce energy consumption.

[0069] Waterproof performance: The in-situ lightweight foam concrete has small water absorption, and the relatively independent closed bubbles and good integrity make it have certain waterproof performance. By adding waterproof agent, the waterproof performance can be further improved.

[0070] Sound insulation and fire resistance: Lightweight foam concrete contains a large number of independent bubbles and has uniform distribution, with sound absorption capacity of 0.09-0.19%, which is 5 times that of ordinary concrete, and has effective sound insulation function. At the same time, it also has excellent fire resistance, does not burn, and the fire resistance limit is greater than three hours.

[0071] Good seismic resistance: The porous nature makes it have low elastic modulus, and it has good absorption and dispersion effect on impact load, so the seismic performance of buildings using lightweight foam concrete will be increased.

[0072] Simple construction: Lightweight foam concrete can be cast in situ, which is combined closely with the main structure layer, simplifying the construction process and shortening the construction period.

[0073] III. Application range

[0074] Lightweight foam concrete is widely used in building filling (including filling between basement roof and beam, adjustment filling when basement structure is not uniform, equipment foundation pit filling, etc.), floor insulation layer (floor heating) cushion, roof insulation and waterproof layer, etc. Its excellent performance makes it play an increasingly important role in construction engineering.

[0075] IV. Matters needing attention

[0076] In the raw material preparation stage, strict inspection of each material is required to ensure quality compliance. In particular, the foaming agent and the foam stabilizer need to be selected for their stable performance and environmental protection.

[0077] The mix proportion design is a key step in foam concrete construction, which needs to consider factors such as engineering requirements, material properties, and climate conditions, and determine the optimal parameters through testing.

[0078] During construction, factors such as mixing speed and time, pipeline smoothness, pouring speed and thickness should be strictly controlled to ensure the uniformity and stability of foam concrete.

[0079] After pouring, timely maintenance should be carried out to ensure the strength and durability of foam concrete.

[0080] In summary, lightweight foam concrete has many advantages and broad application prospects, and is an indispensable new material in construction engineering.

[0081] The existing patent discloses a stone arch bridge reinforced by corrugated steel plate (CN213625172U), which includes an arch bridge body and a pier installed at the lower end of the arch bridge body. The inner arch surface of the arch bridge body is connected with a protective pad and a buckle connected with an arc-shaped steel plate. The protective pad is made of soft rubber material and protects the inner arch surface of the arch bridge body. The protective pad and the arc-shaped steel plate are filled with soundproof filler, which is a sponge body. The soundproof filler reduces the sound generated by the arch bridge body due to vibration, thereby reducing the vibration amplitude and playing a soundproof and auxiliary protection role. A waterproof coating is laid on the outer surface of the arc-shaped steel plate, which can be acrylic waterproof paint or the like. The waterproof coating provides good waterproof treatment for the arc-shaped steel plate, preventing it from being corroded by external air and moisture, affecting its structural strength. A corrugated steel plate is placed between the protective pad and the arc-shaped steel plate. The corrugated steel plate has a polygonal structure to improve its bearing strength. It is uniformly laid between the protective pad and the arc-shaped steel plate to provide multi-point bearing reinforcement for the inner arch surface of the arch bridge body, improving the bearing performance of the arc-shaped steel plate. The protective pad and the arc-shaped steel plate are respectively provided with a groove and a main threaded hole, which is a first stepped hole structure. The corrugated steel plate is provided with a secondary threaded hole. The groove, the main threaded hole, and the secondary threaded hole are threadedly connected with a fixing screw rod, which fixes the corrugated steel plate.

[0082] The bolt is connected with a fixing block on the pier, the fixing block is provided with a preset hole, an expansion bolt is inserted into the preset hole, the extension end of the expansion bolt is inserted into a pre-buried hole in the pier, the expansion bolt fixes the fixing block, a plug is welded on the fixing block, connecting blocks are welded on both sides of the bottom end of the arc-shaped steel plate, the connecting blocks are provided with insertion grooves, the plug is inserted into the insertion grooves, the plug is provided with a threaded groove, the threaded groove is communicated with the insertion grooves, a threaded hole is formed in the inner wall of the upper end of the insertion groove, a screw rod is screwed into the threaded hole and the threaded groove, and the screw rod fixes the plug on the connecting blocks, so that the arc-shaped steel plate is fixed.

[0083] In the process of reinforcing the arch bridge body, the operator first bonds the protective pad to the inner arch surface of the arch bridge body, then bonds the sound insulation filler to the inner surface of the protective pad, then installs a corrugated steel plate on the arc-shaped steel plate, fixes the corrugated steel plate in the auxiliary threaded hole through the fixing screw rod on the arc-shaped steel plate, then installs the arc-shaped steel plate on the outer surface of the sound insulation filler, so that the extension end of the fixing screw rod on the corrugated steel plate is inserted into the groove on the protective pad, further, a pre-buried hole is drilled on the pier with an electric drill, the fixing block is placed on the pier, the preset hole on the fixing block corresponds to the pre-buried hole, the expansion bolt is driven into the preset hole and the pre-buried hole to fix the fixing block, and meanwhile, the plug on the fixing block is inserted into the connecting blocks on both sides of the bottom end of the arc-shaped steel plate, the plug is inserted into the insertion grooves on the connecting blocks, and the screw rod is screwed into the threaded hole and the threaded groove to fix the plug. In the daily use of the arch bridge body, the downward pressure generated by the inner arch surface is transmitted to the arc-shaped steel plate through the corrugated steel plate, the deformation of the corrugated steel plate greatly reduces the bearing pressure of the arch bridge body, the inner arch surface of the arch bridge body can be reinforced and supported at multiple points, and the reinforcing effect is good.

[0084] Meanwhile, another existing patent discloses a corrugated steel arch bridge (CN218466312U), which comprises a plurality of piers arranged on the foundation, a pre-buried part arranged in each pier, the pre-buried part comprising a pre-buried bolt and a pre-buried angle steel; a corrugated steel arch bridge combination is fixedly connected between the plurality of piers, the corrugated steel arch bridge combination comprising a corrugated plate arch ring located in the center of the bridge body, the two ends of the corrugated plate arch ring being fixed between two piers through the pre-buried part; a plurality of corrugated support vertical plates are arranged on the two sides and the upper end face of the corrugated plate arch ring, the plurality of groups of corrugated support vertical plates being parallel to each other, the length of the arrangement being equal to the length of the bridge plate, the lower ends of the plurality of groups of corrugated support vertical plates being fixed on the piers through the pre-buried part, and the upper ends of the plurality of groups of corrugated support vertical plates being connected with the bridge plate, and the bridge plate being filled and laid with a roadbed bridge surface.

[0085] Since the upper end surface of the corrugated plate arch ring is a curved surface with varying curvature, in order to ensure the firm connection between the corrugated support longitudinal plate and the corrugated plate arch ring, a special-shaped corrugated angle steel is used to connect them, the special-shaped corrugated angle steel has a certain curvature, the bending angle of the special-shaped corrugated angle steel is the same as the angle formed by each support longitudinal plate and the corrugated plate arch ring, the wave shape of the special-shaped corrugated angle steel is also the same as the wave shape of the corrugated support longitudinal plate and the corrugated plate arch ring, and the special-shaped corrugated angle steel can be completely overlapped with the corrugated support longitudinal plate and the corrugated plate arch ring and then connected by high-strength bolts. The upper end of the corrugated support longitudinal plate is connected to a corrugated connecting piece, the corrugated connecting piece is a flat corrugated piece structure, the wave shape of the corrugated connecting piece is the same as that of the bridge plate, and the corrugated connecting piece is overlapped with the wave shape of the lower end surface of the bridge plate and then connected by high-strength bolts.

[0086] In order to further strengthen the mechanical strength of the bridge body as a whole, at least one wave-shaped steel angle steel structure is connected by high-strength bolts at the two straight angles where the corrugated support longitudinal plate is perpendicularly connected to the bridge plate. The wave shape of the wave-shaped steel angle steel structure is the same as that of the bridge plate and the corrugated support longitudinal plate, and the wave-shaped steel angle steel structure is overlapped with the corrugated support longitudinal plate and the bridge plate and then connected by high-strength bolts.

[0087] The corrugated plate arch ring, the corrugated support longitudinal plate and the bridge plate are all connected by a plurality of corrugated steel plates. In this embodiment, the plurality of corrugated steel plates are connected by high-strength bolts after being overlapped at the wave crests and troughs of the edges of the corrugated steel plates. In other embodiments, flanges are provided around the corrugated steel plates, and the plurality of corrugated steel plates are connected by high-strength bolts or welded together. Foam sealing pads are provided in the overlapping gaps between every two corrugated steel plates or in the gaps between the abutting flanges. Corrosion-resistant coatings are applied to the outer walls of the corrugated steel plate layers. The above-mentioned arrangement improves the stiffness, durability, seismic resistance and fire resistance of the bridge structure, solves the corrosion problem of the arch ring to some extent, reduces the maintenance cost of the arch ring in the later period, and more importantly, increases the span of the corrugated plate arch ring.

[0088] In one real-time scheme of the patent, the upper end of a single corrugated plate arch ring is directly connected to a bridge plate, and a plurality of corrugated support longitudinal plates are arranged in parallel on both sides of the corrugated plate arch ring and in the gap space formed by the corrugated plate arch ring and the bridge plate.

[0089] In another possible implementation scheme of the present application, a corrugated steel arch bridge is disclosed, comprising a plurality of piers arranged on a foundation, wherein embedded parts are arranged in each pier, and the embedded parts include embedded bolts and embedded angle steels; a corrugated steel arch bridge assembly is fixedly connected between the piers, and the corrugated steel arch bridge assembly includes a plurality of corrugated plate arch rings, namely a large corrugated plate arch ring located in the center of the bridge body and a plurality of small corrugated plate arch rings arranged on the upper end face or both sides of the large corrugated plate arch ring. In this embodiment, the small corrugated plate arch ring is arranged on the upper end face of the large corrugated plate arch ring, forming a structural form similar to the "Zhaozhou Bridge", and the plurality of small corrugated plate arch rings are symmetrically arranged; on both sides of the large corrugated plate arch ring, in the gap space formed by the large corrugated plate arch ring and the bridge plate, Several corrugated support longitudinal plates are respectively arranged on the upper end surface of the small corrugated plate arch ring, and multiple groups of corrugated support longitudinal plates are parallel to each other; the lower ends of the corrugated support longitudinal plates on both sides of the large corrugated plate arch ring are respectively fixed to the bridge piers through embedded parts, and the upper ends are connected to the bridge deck through corrugated connecting plates, and reinforced by corrugated steel angle steel structure; corrugated support longitudinal plates are also arranged in the gap space formed by the large corrugated plate arch ring and the bridge deck, and the corrugated support longitudinal plates are connected to the large corrugated plate arch ring through special-shaped corrugated angle steel, and their upper ends are connected to the bridge deck through corrugated connecting plates, and reinforced by corrugated steel angle steel structure; the connection surface between the small corrugated plate arch ring and the large corrugated plate arch ring is reinforced by special-shaped corrugated angle steel, and the connection method of the corrugated support longitudinal plates at the upper end of the small corrugated plate arch ring is the same as that of the large corrugated plate arch ring.

[0090] In another possible implementation scheme of the present application, the upper end surfaces of the large corrugated plate arch ring and the small corrugated plate arch ring are not directly connected to the bridge deck, but are connected to the bridge deck through the corrugated supporting longitudinal plates connected to their upper ends; the specific connection method of the corrugated supporting longitudinal plates and the bridge deck, bridge piers and corrugated plate arch rings is the same as that in the embodiment.

[0091] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0092] Reference Figures 1-12 As shown, this embodiment provides a semi-assembled self-balancing arch bridge based on corrugated steel, which is erected on symmetrically arranged bases 9 and includes a bridge box 7 erected in a hollow space between two bases 9, and the bridge box 7 is filled with filling material;

[0093] The bridge box 7 includes a bridge head steel box 2 located on a base 9. A corrugated arch box for crossing the river channel is provided between the two bridge head steel boxes 2. Filling material is filled between the bridge head steel box 2 and the corrugated arch box.

[0094] The filling material includes a first filler 3 and a second filler 4. The first filler 3 is filled in the corrugated arch box, and the second filler 4 is filled in the bridge head steel box 2.

[0095] The wave-shaped arch box comprises wave-shaped arch ribs 1 connected between two bridge head steel boxes 2, and a first filler 3 filled in the upper part of the wave-shaped arch ribs 1.

[0096] The utility model discloses a kind of semi-assembly self-balancing arch bridges based on wave-shaped steel, applicable to small span bridge new construction and reconstruction project with environmental protection requirement, tight construction period;Bridge structure of the utility model is convenient to design and customize bridge body box 7 according to field size, bridge body box 7 is hollowly arranged, convenient to make and transport, bridge body box 7 is filled with filler material, and filler material in bridge material box is all cheap material, with low manufacturing cost, strong adaptability;In addition, the bridge structure of the utility model is prefabricated in field, is made in field according to design, then is transported to specified area and assembled and constructed, then can be filled, with fast construction speed, can save the trouble of erecting formwork, support, save manpower and material resources, also reduce the influence to field environment;The structure of the utility model after construction has good integrity, has better durability compared with prefabricated building, and structure is self-balancing system, compared with traditional stone arch bridge, which is strictly required to resist thrust of original foundation, the structure system of the utility model has wider application range and better environmental adaptability.

[0097] In one embodiment of the present application, two bridge body sub-arches 8 are arranged symmetrically on the wave-shaped arch box, which can improve the structural strength of the wave-shaped arch box under the premise of reducing overall weight, and also can assist drainage when water level is too high, has flood discharge capacity, avoids blocking water flow, and can also support the second filler as the side wall of arch foot box chamber 10.

[0098] Further optimization scheme, bridge head steel box 2 is hollowly arranged to form arch foot box chamber 10, and the second filler 4 is filled in the arch foot box chamber 10. Bridge head steel box 2 is designed as a hollow structure, is formed by plate welding according to the designed size, surrounds arch foot box chamber 10, is convenient for transportation and hoisting splicing;Second filler 4 is filled in the interior after hoisting in place, to form a stable structure, improve the efficiency of construction, reduce the cost of construction.

[0099] Further optimization scheme, the bottom end of bridge head steel box 2 is provided with a plurality of arrayed anti-skid structures 5, and the anti-skid structures 5 abut against the top surface of the base 9. The anti-skid structures 5 are a plurality of small structures protruding from the bottom ends of both sides of the bridge head steel box 2, and after hoisting in place, the anti-skid structures 5 abut against the base 9, reducing the risk of sliding between the anti-skid structures 5 and the base 9, improving stability, and further improving the stability and safety of the bridge.

[0100] Further optimization scheme, the first filler 3 includes light foam concrete, and the second filler 4 includes high-density filler. The first filler 3 includes light concrete, is filled in the wave-shaped arch box for supporting the hollow structure, improves the structural strength of the wave-shaped arch box. Since the wave-shaped arch box is across the river, and there is no supporting structure, the first filler 3 adopts light concrete, which can reduce the overall weight on the premise of ensuring the structural strength. The arch foot chamber of the bridge head steel box 2 is filled with high-density filler with large weight, and is tamped, supporting the hollow structure of the bridge head steel box 2, improving the structural strength of the bridge head steel box 2, and stably supporting the bridge. At the same time, the weight of the bridge head steel box 2 filled with high-density filler is greatly increased, improving the stability as the pier, and the increase of the weight can greatly improve the friction between the anti-slide structure 5 and the base 9, effectively preventing sliding deviation.

[0101] In an embodiment of the present application, after the high-density filler is filled into the arch foot box chamber 10, cement slurry needs to be injected for interstitial filling, reducing the existence of voids, and also combining the high-density filler into a whole, improving the stability.

[0102] Further optimization scheme, the base 9 includes graded gravel 6. The base 9 is piled up by graded gravel 6 and is combined by hardening concrete mortar, which is the foundation of bridge construction and forms a horizontal mounting surface, effectively avoiding the sinking of the bridge during use and prolonging the service life of the bridge. At the same time, the top surface of the base 9 piled up by graded gravel 6 and concrete is uneven, which contacts with the anti-slide structure 5 and can form interlocking to increase the horizontal thrust, and the improvement of the horizontal thrust is embodied in the value of the friction coefficient μ of the anti-slide structure 5 below, which needs to be determined according to the test.

[0103] Further optimization scheme, the wave-shaped arch rib 1 is provided with side plates on both sides, the side plates are fixedly connected with the bridge head steel box 2, and the first filler 3 is filled in the space surrounded by the wave-shaped arch rib 1 and the side plates. The wave-shaped arch rib 1 is respectively welded with side plates on both sides to form a channel-shaped structure, which is convenient for bearing the first filler 3. The wave-shaped arch rib 1 and the side plates are both folded by on-site cutting, and then welded after reaching the construction site, which is convenient for transportation and hoisting and effectively reduces the transportation pressure of the wave-shaped arch box.

[0104] Further optimization scheme, the bridge deck 11 is laid between the two side plates and abuts above the first filler 3. The bridge deck 11 extends to both sides and connects with the original road surface, and the bridge deck 11 is located at the top end of the wave-shaped arch box and abuts with the top end of the second filler 4. The bridge deck 11 is arranged at the top end of the wave-shaped arch box and laid at the top end of the first filler 3 to form a road surface convenient for walking and driving, and then the bridge deck 11 extends to the top end of the bridge head steel box 2 and is laid at the top end of the second filler 4. The bridge deck 11 extends to both sides of the bridge head steel box 2 and connects with the original road surface, which is convenient for pedestrians and vehicles.

[0105] In one embodiment of the present application, the bridge deck 11 is made of concrete, asphalt alone or concrete base, asphalt layer structure, which can be selected according to the specific use requirements.

[0106] In one embodiment of the present application, the bridge deck 11 can be designed with a guardrail 12 to improve the protection.

[0107] Further optimization scheme, the arch foot box chamber 10 and the corrugated arch rib 1 are provided with a separation baffle 13 for separating the first filler 3 and the second filler 4. The separation baffle 13 is used to separate the first filler 3 and the second filler 4, to prevent the second filler 4 from flowing into the corrugated arch box when filling.

[0108] The utility model discloses still a kind of semi-assembly self-balancing arch bridge construction method based on corrugated steel, comprising the following steps:

[0109] Site situation of bridge construction area is investigated in situ, and the load demand of bridge is obtained;

[0110] According to the obtained site situation and load demand, the design of bridge size is carried out;The design of bridge size of bridge design includes the thickness of bridge body box 7, the height of bridge, the ratio of vector span, the length of bridge head steel box 2 along the longitudinal direction of bridge and the size of bottom corrugated arch rib 1;

[0111] Among them, the height of bridge is considered to be adapted to old road elevation, and the arch rib thickness required to meet the bearing capacity of bridge under the combined action of dead load and live load should be considered;The corrugated arch rib 1 of corrugated arch box can bear tensile stress, which improves the bending resistance of structure, but the part of bearing capacity is taken as safety reserve.

[0112] The ratio of vector span considers the size of bridge span and arch foot thrust.

[0113] The size of bottom corrugated arch rib 1 is determined, on the one hand, the strength and stability under construction load are considered, on the other hand, the strength and stability of corrugated arch rib 1 under the action of material self weight after construction light weight concrete are also considered, and the specific design and checking refer to the current "steel structure design specification".

[0114] The thickness of side wall of bridge body box 7 should consider the lateral pressure after filling material, and the strength and stability are checked.

[0115] The strength and stability of bridge body box 7 under the action of construction load and filling material dead load can be directly checked according to the current steel structure design specification, but the self-balancing system needs to be specified and protected separately: mainly related to the ratio of vector span, the length of bridge head steel box 2 along the longitudinal direction of bridge, the filling material bulk density γ, the friction coefficient μ of anti-skid structure 5.

[0116] According to the attached Figure 12The bridge height is related to the original road elevation, and is a constant value h; the bridge width is adapted to the original road width, and is a constant value b; and the bridge net span is related to the bridge site layout, and is a constant value d.

[0117] If the rise-span ratio is f1, the rise is:

[0118] x2=d*f1

[0119] The lightweight concrete volume corresponding to the rise-span ratio f1 is V1.

[0120] In fact, the stress mode of the structure system described in the utility model patent is similar to a two-hinged arch, and the wave-shaped steel at the lower edge of the arch rib can make the arch rib bear the bending moment, but the part of the bearing capacity is considered as a safety reserve, and the horizontal thrust is designed and calculated according to a three-hinged arch.

[0121] Then the arch foot horizontal thrust F x is:

[0122]

[0123] Wherein, l is the distance from the origin point of the range of lightweight concrete at the arch foot to the midspan direction, and f(l) is the average height of lightweight concrete at a certain distance from the origin point of the range of lightweight concrete at the arch foot to the midspan direction.

[0124] If the system is to be self-balanced, the horizontal anti-sliding force N d should satisfy:

[0125] N d >α1F x

[0126] Wherein, α1 is an amplification coefficient considering the action of live load.

[0127] If the high-density filler in the bridge head steel box 2 has a unit weight of γ2, N d can be calculated:

[0128]

[0129] Then the patent specifies that the value relationship between x1 and f1 is:

[0130]

[0131] According to the designed size, the bridge head steel box 2 and the wave-shaped arch box are made in the inner field, and the bridge head steel box 2 and the wave-shaped arch box are transported to the bridge construction area;

[0132] According to the designed type and quantity, the first filler 3 and the second filler 4 are prepared as filler materials, and the first filler 3 and the second filler 4 are transported to the bridge construction area;

[0133] The bridge head steel box 2 and the wave-shaped arch box are assembled into the bridge body box 7, and then the bridge body box 7 is erected on the two bases 9; the foundation at the bridge head position is replaced with graded gravel 6 to form the base 9, so as to ensure the stability of the foundation, the replacement thickness is not less than 1.5 m, and the replacement range should be greater than 0.5 m outside the arch foot contact surface of the bridge head steel box 2; for the bridge environment with anti-scouring requirements, the surface of the graded gravel 6 should be protected by anti-scouring structure, the replacement graded gravel 6 is in contact with the arch foot anti-sliding structure 55, and can form interlocking and increase the horizontal thrust resistance; then the bridge head steel box 2 is erected on the designed bridge position, wherein the bridge head steel box 2 is arranged on the base 9 composed of the replaced graded gravel 6;

[0134] The second filler 4 is injected into the bridge head steel box 2 again, the first filler 3 is filled into the wave-shaped arch box after the second filler 4 is solidified to the designed value, and curing is performed to the designed strength; the high-density filler is added into the bridge head steel box 2, and the cement slurry is injected for filling gaps; in order to prevent the cement slurry from flowing out of the bridge head steel box 2, a separation baffle 13 is arranged at the position where the bridge head steel box 2 and the wave-shaped arch box are connected; after the filler cement slurry in the bridge head steel box 2 is initially solidified, the light-weight concrete is injected into the box chamber of the wave-shaped arch box, and after the light-weight concrete is solidified, the bridge deck 11 paving construction can be performed.

[0135] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0136] The above-described embodiments are only preferred modes of the utility model, and do not limit the scope of the utility model, and various modifications and improvements to the technical scheme of the utility model made by those skilled in the art without departing from the design spirit of the utility model should fall within the protection scope of the utility model claim.

Claims

1. A semi-assembled self-balanced arch bridge based on corrugated steel, erected on bases (9) arranged symmetrically, characterized in that: The bridge box (7) is filled with filling material. The bridge box (7) comprises bridge head steel boxes (2) seated on the base (9), and a wave-shaped arch box arranged between the two bridge head steel boxes (2) for crossing the river channel, and the filling material is filled between the bridge head steel boxes (2) and the wave-shaped arch box. The filling material comprises first filling material (3) and second filling material (4), the first filling material (3) is filled in the wave-shaped arch box, and the second filling material (4) is filled in the bridge head steel box (2). The wave-shaped arch box comprises wave-shaped arch ribs (1) connected between the two bridge head steel boxes (2), and the first filling material (3) is filled above the wave-shaped arch ribs (1).

2. The wave-shaped steel based semi-fabricated self-balanced arch bridge according to claim 1, characterized in that: The bridge head steel box (2) is hollow to form an arch foot box chamber (10), and the second filling material (4) is filled in the arch foot box chamber (10).

3. The wave-shaped steel based semi-fabricated self-balanced arch bridge according to claim 1, characterized in that: The bottom end of the bridge head steel box (2) is provided with a plurality of anti-skid structures (5) arranged in an array, and the anti-skid structures (5) abut against the top surface of the base (9).

4. The wave-shaped steel based semi-fabricated self-balanced arch bridge according to claim 1, characterized in that: The first filling material (3) comprises lightweight foam concrete, and the second filling material (4) comprises high-density filler.

5. The wave-shaped steel based semi-fabricated self-balanced arch bridge according to claim 1, characterized in that: The base (9) comprises graded gravel (6).

6. The wave-shaped steel based semi-fabricated self-balanced arch bridge according to claim 1, characterized in that: The wave-shaped arch ribs (1) are provided with side plates on both sides, the side plates are fixedly connected with the bridge head steel boxes (2), and the first filling material (3) is filled in the space surrounded by the wave-shaped arch ribs (1) and the side plates.

7. The wave-shaped steel based semi-fabricated self-balanced arch bridge according to claim 6, characterized in that: Bridge decks (11) are arranged between the two side plates and abut above the first filling material (3); the bridge decks (11) extend to both sides and are connected with the original road surface, and the bridge decks (11) are located at the top end of the wave-shaped arch box and abut against the top end of the second filling material (4).

8. The wave-shaped steel based semi-fabricated self-balanced arch bridge according to claim 2, characterized in that: The arch foot box chamber (10) and the wave-shaped arch ribs (1) are provided with a partition baffle (13) for partitioning the first filling material (3) and the second filling material (4).

Images