An assembled bridge

Abstract

The present invention relates to the technical field of bridges, and specifically relates to a prefabricated bridge, which includes a first bridge section and a second bridge section. There is a gap between the first bridge section and the second bridge section, and a fixing unit for fixing the first bridge section and the second bridge section is installed between the first bridge section and the second bridge section. Each fixing unit includes a first connecting rod and a second connecting rod. The first connecting rod and the second connecting rod are rotatably connected. A third connecting rod is rotatably connected between the first connecting rod, the second connecting rod and the first bridge section. A fourth connecting rod is rotatably connected between the first connecting rod, the second connecting rod and the second bridge section. The rotation axes of the third connecting rods form an isosceles trapezoid, and the rotation axes of the fourth connecting rods form an isosceles trapezoid. A fifth connecting rod is rotatably connected between the first connecting rod and the second connecting rod. The first connecting rod and the second connecting rod are made of the same material, and the thermal expansion coefficients of the fifth connecting rods and the first connecting rod are different. The present invention reduces the influence caused by thermal expansion and contraction after the bridge sections are fixed.

Description

Technical Field

[0001] The present invention relates to the technical field of bridges, and specifically to a prefabricated bridge. Background Art

[0002] The prefabricated bridge can effectively improve the on-site construction speed, ensure the quality of structural components, and improve the structural durability by using prefabricated components for assembly instead of in-situ casting. Its application scope and prospects are broad. After the bridge segments of the prefabricated bridge are fixed, due to the factor of thermal expansion and contraction, large stresses are generated between the bridge segments with temperature changes, which is not conducive to the connection of the bridge segments. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art and to overcome the defects of the prior art, the purpose of the present invention is to provide a prefabricated bridge to solve the above problems.

[0004] Its technical solution is that a prefabricated bridge includes a first bridge segment and a second bridge segment. There is a gap between the first bridge segment and the second bridge segment. A fixing unit for fixing the first bridge segment and the second bridge segment is installed between the first bridge segment and the second bridge segment. Each fixing unit includes a first connecting rod and a second connecting rod. The first connecting rod and the second connecting rod are rotatably connected. A third connecting rod is rotatably connected between the first connecting rod, the second connecting rod and the first bridge segment. A fourth connecting rod is rotatably connected between the first connecting rod, the second connecting rod and the second bridge segment. The rotation axes of the third connecting rods form an isosceles trapezoid, and the rotation axes of the fourth connecting rods form an isosceles trapezoid. A fifth connecting rod is rotatably connected between the first connecting rod and the second connecting rod. The first connecting rod and the second connecting rod are made of the same material, and the thermal expansion coefficients of the fifth connecting rods are different from that of the first connecting rod.

[0005] Preferably, each fifth connecting rod is located in the annular area surrounded by the first connecting rod, the second connecting rod, the first bridge segment or the second bridge segment, and the thermal expansion coefficient of each fifth connecting rod is greater than that of the first connecting rod.

[0006] Preferably, at least two of the fixing units are inclined or perpendicular to each other in plane.

[0007] Preferably, the first bridge segment and the second bridge segment are slidably connected to the support rods, and the sliding direction of each support rod is the same as the length direction of the first bridge segment.

[0008] Preferably, a plug made of rubber material is installed at the upper side between the first bridge segment and the second bridge segment.

[0009] Preferably, it further includes bridge piers. One ends of the first bridge segment and the second bridge segment close to each other are located on the bridge piers, and some of the support rods are fixedly connected to the bridge piers.

[0010] The present invention provides an assembled bridge, and the beneficial effects compared with the prior art are as follows:

[0011] 1. When the temperature rises, the first bridge section approaches the second bridge section. At the same time, the elongation per meter of the fifth connecting rod is greater than that of the first connecting rod per meter and also greater than that of the second connecting rod per meter. This causes the distance between the fifth connecting rod and the rotation axes of the first and second connecting rods to decrease, and the distance between the fifth connecting rod and the adjacent first or second bridge section to decrease, that is, the length of the fixing unit in the length direction of the first bridge section decreases, thereby reducing or neutralizing the stress generated by the approach of the first bridge section and the second bridge section. When the temperature drops, the first bridge section moves away from the second bridge section. At the same time, the contraction per meter of the fifth connecting rod is greater than that of the first connecting rod per meter and also greater than that of the second connecting rod per meter. This causes the distance between the fifth connecting rod and the rotation axes of the first and second connecting rods to increase, and the distance between the fifth connecting rod and the adjacent first or second bridge section to increase, that is, the length of the fixing unit in the length direction of the first bridge section increases, thereby reducing or neutralizing the stress generated by the separation of the first bridge section and the second bridge section. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the front view structural schematic diagram of the present invention.

[0013] Figure 2 It is the front view structural schematic diagram of another embodiment of the present invention.

[0014] Figure 3 It is the front view structural schematic diagram of another embodiment of the present invention.

[0015] In the figure: 1 first bridge section, 2 second bridge section, 3 fixing unit, 3.1 first connecting rod, 3.2 second connecting rod, 3.3 third connecting rod, 3.4 fourth connecting rod, 3.5 fifth connecting rod, 4 support rod, 5 sleeve, 6 bridge pier, 7 plug. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope protected by the present invention. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present invention.

[0017] In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "mounted", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] The present invention will be further described in detail below through specific embodiments and with reference to the accompanying drawings.

[0019] Please refer to Figure 1, the present invention provides a technical solution: an assembled bridge, including a first bridge section 1 and a second bridge section 2. There is a gap between the first bridge section 1 and the second bridge section 2. A fixing unit 3 for fixing the first bridge section 1 and the second bridge section 2 is installed between the first bridge section 1 and the second bridge section 2. Each fixing unit 3 includes a first connecting rod 3.1 and a second connecting rod 3.2. The first connecting rod 3.1 and the second connecting rod 3.2 are rotatably connected. A third connecting rod 3.3 is rotatably connected between the first connecting rod 3.1, the second connecting rod 3.2 and the first bridge section 1. A fourth connecting rod 3.4 is rotatably connected between the first connecting rod 3.1, the second connecting rod 3.2 and the second bridge section 2. The rotation axes of the third connecting rods 3.3 form an isosceles trapezoid, and the rotation axes of the fourth connecting rods 3.4 form an isosceles trapezoid. Among them, in one fixing unit 3, there are two third connecting rods 3.3 and two fourth connecting rods 3.4. Regardless of how the temperature changes, the rotation axes of the third connecting rods 3.3 always form an isosceles trapezoid, and the rotation axes of the fourth connecting rods 3.4 always form an isosceles trapezoid. A fifth connecting rod 3.5 is rotatably connected between the first connecting rod 3.1 and the second connecting rod 3.2. The first connecting rod 3.1 and the second connecting rod 3.2 are made of the same material. The thermal expansion coefficients of the fifth connecting rods 3.5 and the first connecting rod 3.1 are different. Through the cooperation of the first connecting rod 3.1, the second connecting rod 3.2, the third connecting rod 3.3, the fourth connecting rod 3.4 and the fifth connecting rod 3.5, the first bridge section 1 and the second bridge section 2 are fixed. Since the first connecting rod 3.1 and the second connecting rod 3.2 are made of the same material, their thermal expansion coefficients are the same. When the temperature changes, the lengths of the fifth connecting rods 3.5 relative to the first connecting rod 3.1 change differently, thereby changing the angle between the first connecting rod 3.1 and the second connecting rod 3.2, so as to adjust the stress generated by thermal expansion and contraction after the first bridge section 1 and the second bridge section 2 are fixed, and reduce the influence of thermal expansion and contraction on the fixed connection of each bridge section.

[0020] In one embodiment, each fifth link 3.5 is located within the annular region formed by the first link 3.1, the second link 3.2, and the first bridge section 1 or the second bridge section 2. The coefficient of thermal expansion of each fifth link 3.5 is greater than that of the first link 3.1. The material of the first link 3.1 can be a suitable material such as low-carbon steel, and the fifth link 3.5 is a suitable material such as stainless steel. When the temperature rises, the first bridge section 1 approaches the second bridge section 2. At the same time, the elongation per meter of the fifth link 3.5 is greater than that of the first link 3.1 per meter and also greater than that of the second link 3.2 per meter, causing the distance between the fifth link 3.5 and the rotation axes of the first link 3.1 and the second link 3.2 to decrease, and the distance between the fifth link 3.5 and the adjacent first bridge section 1 or second bridge section 2 to decrease, that is, causing the length of the fixing unit 3 in the length direction of the first bridge section 1 to decrease, thereby reducing or neutralizing the stress generated by the approach of the first bridge section 1 and the second bridge section 2. When the temperature drops, the first bridge section 1 moves away from the second bridge section 2. At the same time, the contraction per meter of the fifth link 3.5 is greater than that of the first link 3.1 per meter and also greater than that of the second link 3.2 per meter, causing the distance between the fifth link 3.5 and the rotation axes of the first link 3.1 and the second link 3.2 to increase, and the distance between the fifth link 3.5 and the adjacent first bridge section 1 or second bridge section 2 to increase, that is, causing the length of the fixing unit 3 in the length direction of the first bridge section 1 to increase, thereby reducing or neutralizing the stress generated by the separation of the first bridge section 1 and the second bridge section 2.

[0021] In one embodiment, the third link 3.3, the fourth link 3.4, and the first link 3.1 are made of the same material.

[0022] In one embodiment, at least two of the planes of each fixing unit 3 are inclined or perpendicular. Among them, each fixing unit 3 can be located in the middle between the first bridge section 1 and the second bridge section 2. Two adjacent fixing units 3 are inclined at an angle of 45°. For example, some of the fixing units 3 are arranged in parallel, and a fixing unit 3 inclined at an angle of 45° to the adjacent fixing unit 3 is arranged between two parallel fixing units 3. On the basis of the above arrangement, fixing units 3 parallel to the bottom surfaces of the bridge sections can also be arranged at the bottom between the first bridge section 1 and the second bridge section 2.

[0023] In one embodiment, such as Figure 2As shown, the first bridge section 1 and the second bridge section 2 are slidably connected to the support rods 4, and the sliding direction of each support rod 4 is consistent with the length direction of the first bridge section 1. The first bridge section 1 and the second bridge section 2 are fixedly connected with a sleeve 5. The connection mode between the sleeve 5 and each bridge section can be welding or bolt fixation. The first bridge section 1 and the second bridge section 2 are slidably connected to the support through the sleeve 5. The support rods 4 can be located at the bottom surface of each bridge section, or at the side surfaces and the bottom surface of each bridge section.

[0024] In one embodiment, as Figure 3 shown, it further includes a bridge pier 6. The bridge pier 6 is fixed on the ground. One end of the first bridge section 1 and the second bridge section 2 that are close to each other is located on the bridge pier 6. Some of the support rods 4 are fixedly connected to the bridge pier 6, and among them, the support rods 4 located at the bottom surface of each bridge section are cast and fixed to the bridge pier 6.

[0025] In one embodiment, a plug 7 made of rubber material is installed at the upper side between the first bridge section 1 and the second bridge section 2. The plug 7 is snap - fixed to each bridge section, and the plug 7 is used to block the gap at the upper side between the first bridge section 1 and the second bridge section 2.

[0026] In one embodiment, the first bridge section 1 and the second bridge section 2 can be steel - structure assembled bridges or other suitable bridges.

[0027] The above has described the present invention in detail through specific implementation manners and embodiments, but these do not constitute limitations on the present invention. Without departing from the principle of the present invention, those skilled in the art can also make many deformations and improvements, which should also be regarded as the protection scope of the present invention.

Claims

1. An assembled bridge, comprising a first bridge section (1) and a second bridge section (2), characterized in that: There is a gap between the first bridge section (1) and the second bridge section (2). A fixing unit (3) for fixing the first bridge section (1) and the second bridge section (2) is installed between the first bridge section (1) and the second bridge section (2). Each fixing unit (3) includes a first connecting rod (3.1) and a second connecting rod (3.2). The first connecting rod (3.1) is rotatably connected to the second connecting rod (3.2). A third connecting rod (3.3) is rotatably connected between the first connecting rod (3.1), the second connecting rod (3.2) and the first bridge section (1). A fourth connecting rod (3.4) is rotatably connected between the first connecting rod (3.1), the second connecting rod (3.2) and the second bridge section (2). The rotation axes of the third connecting rods (3.3) form an isosceles trapezoid, and the rotation axes of the fourth connecting rods (3.4) form an isosceles trapezoid. A fifth connecting rod (3.5) is rotatably connected between the first connecting rod (3.1) and the second connecting rod (3.2). The first connecting rod (3.1) and the second connecting rod (3.2) are made of the same material, and the coefficient of thermal expansion of each fifth connecting rod (3.5) is different from that of the first connecting rod (3.1). Each fifth connecting rod (3.5) is located in the annular area surrounded by the first connecting rod (3.1), the second connecting rod (3.2) and the first bridge section (1) or the second bridge section (2). The coefficient of thermal expansion of each fifth connecting rod (3.5) is greater than that of the first connecting rod (3.1). At least two of the fixing units (3) are in inclined or perpendicular planes.

2. The prefabricated bridge according to claim 1, wherein: The first bridge section (1) and the second bridge section (2) are slidably connected to the support rods (4). The sliding direction of each support rod (4) is consistent with the length direction of the first bridge section (1).

3. An assembled bridge according to claim 1, characterized in that: A plug block (7) made of rubber material is installed at the upper side between the first bridge section (1) and the second bridge section (2).

4. The prefabricated bridge according to claim 2, characterized in that: It further includes a bridge pier (6). One ends of the first bridge section (1) and the second bridge section (2) close to each other are located on the bridge pier (6). Part of each support rod (4) is fixedly connected to the bridge pier (6).

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