A rapid-assembly steel-concrete composite bridge structure

Abstract

This utility model discloses a rapid-assembly steel-concrete composite bridge structure, relating to the field of bridge construction technology. It includes splicing components, extension components, connecting components, and two sets of side channel steels. H-shaped extension steel beams are inserted into both sides of the side channel steels. This rapid-assembly steel-concrete composite bridge structure, by incorporating the extension components, allows for partial extension of the steel frame body according to the river width. A manual crank is inserted along the crank handle insertion hole on the limiting ring, and the spline head engages with the spline sleeve. Cranking the manual crank then drives the second inclined gear to rotate. The second inclined gear, driven by the first inclined gear, causes the ball screw to rotate at a constant speed. The ball screw and ball nut cooperate to push the H-shaped extension steel beams outward along the interior of the side channel steels, achieving flexible extension at both ends. This solves the problems of poor expandability and complex node construction in existing steel-concrete bridge structures.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, specifically to a rapid-assembly steel-concrete composite bridge structure. Background Technology

[0002] In bridge engineering, especially in the fields of temporary bridges, emergency rescue and disaster relief channels, military bridges, and modular construction, extremely high demands are placed on the rapid deployment, scalability, and reusability of bridge structures. Although traditional steel-concrete composite bridges have the advantages of high load-bearing capacity and high rigidity, their on-site construction usually involves a large amount of welding, bolting, and wet concrete work, resulting in long construction cycles, high dependence on professional personnel and equipment, and difficulty in meeting the needs of rapid passage in emergency situations.

[0003] In existing technologies, there are schemes that use hot-rolled H-beams as main beams, combined with precast concrete slabs to form a composite structure. The lateral connections in these schemes mostly rely on welding between the H-beams or using high-strength bolts to connect the lateral support beams (such as channel steel or I-beams). However, this connection method has the following inherent drawbacks: First, it has poor scalability and is difficult to extend flexibly. When it is necessary to extend the bridge, the traditional connection method is extremely cumbersome. New connecting components need to be precisely positioned and welded or bolted to the ends of the existing structure, a tedious process, and the quality of on-site welding is difficult to guarantee. Second, the entire extension process is like redoing the end construction, failing to achieve a seamless and rapid extension, seriously affecting the efficiency of quickly expanding the bridge span in emergency situations.

[0004] Secondly, the complex structure of the nodes restricts rapid assembly. Existing transverse connection nodes usually require complex node plates and multi-directional bolt groups. There are many types of components, and they need to be aligned in multiple directions at the same time during assembly. This requires high manufacturing precision and on-site operation skills. Any slight error may lead to assembly difficulties and slow down the overall construction progress.

[0005] Now, a novel rapid-assembly steel-concrete composite bridge structure is proposed to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a rapidly assembled steel-concrete composite bridge structure to solve the problems of poor scalability and complex node construction of existing steel-concrete bridge structures mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a quick-assembly steel-concrete composite bridge structure, including splicing components, extension components, connecting components and two sets of side channel steels, wherein H-shaped extension steel beams are respectively inserted into both sides inside the side channel steels, and support legs are bolted to the bottom end of the H-shaped extension steel beams.

[0008] The extension assembly includes two sets of bearing seats, which are welded and fixed between the front and rear ends of the side channel steel. A ball screw is laterally movably connected inside the bearing seat. A first helical gear is fixedly connected to the end of the ball screw. A second helical gear is movably connected to the top of the side channel steel. A spline sleeve is fixedly connected to the bottom of the second helical gear. Two sets of limiting rings are fixedly connected to the bottom of the side channel steel. A crank handle insertion hole is opened inside the limiting ring. A manual crank handle is inserted into the crank handle insertion hole from bottom to top. A spline head is welded and fixed to the top of the manual crank handle. Screw pre-reserved slots are opened on the left and right sides of the H-shaped extension steel beam. Ball nuts are fixedly connected inside the left and right sides of the H-shaped extension steel beam.

[0009] As a further technical solution of this utility model, the external shape and size of the H-shaped extended steel beam are adapted to the internal shape and size of the side channel steel, and the H-shaped extended steel beam can slide left and right along the inside of the side channel steel.

[0010] As a further technical solution of this utility model, the first helical gear and the second helical gear mesh with each other, and the external thread of the ball screw and the internal thread of the ball nut are adapted to each other.

[0011] As a further technical solution of this utility model, the horizontal center lines of the ball screw, the screw pre-reserved groove, and the ball nut coincide, the ball screw passes through the ball nut and extends into the interior of the screw pre-reserved groove, and the inner diameter of the screw pre-reserved groove is larger than the outer diameter of the ball screw.

[0012] As a further technical solution of this utility model, the external shape and size of the spline head are adapted to the internal shape and size of the spline sleeve, and the vertical center lines of the second inclined gear, the spline sleeve, and the spline head coincide.

[0013] As a further technical solution of this utility model, the splicing assembly includes multiple sets of H-shaped support steel beams. The multiple sets of H-shaped support steel beams are respectively fixed to the top of the side channel steel by bolts. The front and rear ends of the H-shaped support steel beams are respectively welded and fixed with outer fixing blocks. The bottom end of the H-shaped support steel beams is welded and fixed with two sets of inner support blocks. The inner longitudinal part of the outer fixing blocks is inserted with fastening bolts.

[0014] As a further technical solution of this utility model, the front and rear ends of the side channel steel are respectively attached to the outer fixing block and the inner support block, and the fastening bolt passes through the outer fixing block and extends into the interior of the side channel steel.

[0015] As a further technical solution of this utility model, the connecting component includes multiple sets of second connecting screw holes, which are respectively opened on the left and right sides of the front and rear sides of the H-shaped extended steel beam. Two sets of first connecting screw holes are respectively opened on the left and right sides of the front and rear sides of the side channel steel. The size and spacing of the first connecting screw holes and the second connecting screw holes correspond one-to-one.

[0016] Compared with the prior art, the beneficial effects of this utility model are: the quick-assembly steel-concrete composite bridge structure not only realizes the function of flexible extension at both ends, but also realizes the function of easy assembly and splicing, and also realizes the function of easy connection and extension.

[0017] (1) By setting up extension components, when in use, the side channel steel and splicing components constitute the main steel frame of the bridge, and the H-shaped extension steel beam and support legs increase the strength and serve as bottom support. The support legs of appropriate length can be selected and installed as needed. During erection, the main steel frame can be extended locally according to the width of the river channel. Insert the manual crank along the crank insertion hole on the limit ring, and the spline head is inserted into the spline sleeve. At this time, cranking the manual crank can drive the second inclined gear to rotate. The second inclined gear is driven by the first inclined gear, and the ball screw rotates at a constant speed. The ball screw and ball nut cooperate to push the H-shaped extension steel beam to extend outward along the inside of the side channel steel. It is more flexible in use, and there is no need to weld or install additional structures, realizing the function of flexible extension at both ends.

[0018] (2) By setting up splicing components, the side channel steel, splicing components, H-shaped extension steel beam and support legs can be transported separately during transportation. When assembling, the H-shaped support steel beam is fastened to the top of the side channel steel. The gap between the outer fixing block and the inner support block can be inserted into the side channel steel. The fastening bolts are then driven in for further reinforcement. The overall installation is convenient. Then, the H-shaped extension steel beam is inserted along the side of the side channel steel, which realizes the function of easy assembly and splicing.

[0019] (3) By setting up connecting components, when the adjustment at both ends is insufficient to cross the current river channel, another set of assembled bridges is taken and divided into two groups, A and B. The H-shaped extension steel beam and support leg on the left side of group A are removed. Then the position of the H-shaped extension steel beam in group B is adjusted so that it extends to a suitable length. Then it is inserted into the empty area on the left side of the channel steel of group A. The ball screw is rotated to make it fit into the corresponding ball nut. Bolts are driven in along the first connecting screw hole and the second connecting screw hole for reinforcement. The ball screw and ball nut also play a pulling role, realizing the function of easy connection and lengthening. Attached Figure Description

[0020] Figure 1 This is a front view structural diagram of the present utility model;

[0021] Figure 2This is a front view schematic diagram of the side channel steel structure of this utility model;

[0022] Figure 3 For the present utility model Figure 2 Enlarged cross-sectional view of point A in the middle;

[0023] Figure 4 This is an enlarged front view cross-sectional schematic diagram of the H-shaped extended steel beam of this utility model;

[0024] Figure 5 This is a side view magnified structural diagram of the splicing component of this utility model;

[0025] Figure 6 This is a front view structural diagram of the spliced ​​and extended state of this utility model.

[0026] In the diagram: 1. Side channel steel; 2. Splicing assembly; 201. H-shaped support steel beam; 202. Outer fixing block; 203. Inner support block; 204. Fastening bolt; 3. H-shaped extension steel beam; 4. Support leg; 5. Extension assembly; 501. Bearing seat; 502. Ball screw; 503. First helical gear; 504. Second helical gear; 505. Spline sleeve; 506. Limiting ring; 507. Crank handle socket; 508. Manual crank handle; 509. Spline head; 510. Screw pre-reserved groove; 511. Ball nut; 6. Connecting assembly; 601. First connecting screw eye; 602. Second connecting screw eye. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example: Please refer to Figure 1-4 A quick-assembly steel-concrete composite bridge structure includes a splicing component 2, an extension component 5, a connecting component 6, and two sets of side channel steels 1. H-shaped extension steel beams 3 are inserted into both sides of the side channel steel 1, and support legs 4 are bolted to the bottom end of the H-shaped extension steel beams 3.

[0029] Please see Figure 1-4A quick-assembly steel-concrete composite bridge structure also includes an extension component 5. The extension component 5 includes two sets of bearing seats 501. The two sets of bearing seats 501 are welded and fixed between the front and rear ends inside the side channel steel 1. A ball screw 502 is movably connected to the inside of the bearing seat 501. A first helical gear 503 is fixedly connected to the end of the ball screw 502. A second helical gear 504 is movably connected to the top of the inside of the side channel steel 1. A spline sleeve 505 is fixedly connected to the bottom of the second helical gear 504. Two sets of limiting rings 506 are fixedly connected to the bottom of the side channel steel 1. A crank insertion hole 507 is opened inside the limiting ring 506. A manual crank 508 is inserted into the crank insertion hole 507 from bottom to top. A spline head 509 is welded and fixed to the top of the manual crank 508. Screw pre-reserved grooves 510 are opened on the left and right sides of the H-shaped extension steel beam 3. Ball nuts 511 are fixedly connected to the inside of the left and right sides of the H-shaped extension steel beam 3.

[0030] The external shape and dimensions of the H-shaped extension steel beam 3 are compatible with the internal shape and dimensions of the side channel steel 1. The H-shaped extension steel beam 3 can slide left and right along the inside of the side channel steel 1. The first helical gear 503 and the second helical gear 504 mesh with each other. The external thread of the ball screw 502 is compatible with the internal thread of the ball nut 511. The horizontal center lines of the ball screw 502, the screw pre-reserved groove 510, and the ball nut 511 coincide. The ball screw 502 passes through the ball nut 511 and extends into the interior of the screw pre-reserved groove 510. The inner diameter of the screw pre-reserved groove 510 is larger than the outer diameter of the ball screw 502. The external shape and dimensions of the spline head 509 are compatible with the internal shape and dimensions of the spline sleeve 505. The vertical center lines of the second helical gear 504, the spline sleeve 505, and the spline head 509 coincide, which facilitates small-amplitude extension.

[0031] Specifically, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the main body of the steel frame can be partially extended according to the width of the river channel. The manual crank handle 508 is inserted into the crank handle insertion hole 507 on the limiting ring 506, and the spline head 509 is inserted into the spline sleeve 505. At this time, cranking the manual crank handle 508 can drive the second helical gear 504 to rotate. The second helical gear 504 is driven by the first helical gear 503, and the ball screw 502 rotates at a constant speed. The ball screw 502 and the ball nut 511 cooperate to push the H-shaped extension steel beam 3 to extend outward along the inside of the side channel steel 1. It is more flexible in use and does not require welding or installation of additional structures.

[0032] The splicing component 2 includes multiple sets of H-shaped support steel beams 201, which are fixed to the top of the side channel steel 1 by bolts. The front and rear ends of the H-shaped support steel beams 201 are respectively welded and fixed with outer fixing blocks 202, and the bottom end of the H-shaped support steel beams 201 is welded and fixed with two sets of inner support blocks 203. Fastening bolts 204 are inserted longitudinally inside the outer fixing blocks 202. The front and rear ends of the side channel steel 1 are respectively attached to the outer fixing blocks 202 and the inner support blocks 203. The fastening bolts 204 pass through the outer fixing blocks 202 and extend into the interior of the side channel steel 1, which facilitates assembly and splicing.

[0033] Specifically, such as Figure 1 and Figure 5 As shown, during assembly, the H-shaped support steel beam 201 is fastened to the top of the side channel steel 1. The gap between the outer fixing block 202 and the inner support block 203 fits perfectly into the side channel steel 1. The fastening bolts 204 are then driven in for further reinforcement. The overall installation is convenient. Then, the H-shaped extension steel beam 3 is inserted along the side of the side channel steel 1.

[0034] The connecting component 6 includes multiple sets of second connecting screw holes 602, which are respectively opened on the left and right sides of the front and rear sides of the H-shaped extension steel beam 3. Two sets of first connecting screw holes 601 are respectively opened on the left and right sides of the front and rear sides of the side channel steel 1. The size and spacing of the first connecting screw holes 601 and the second connecting screw holes 602 correspond one-to-one, which facilitates splicing and extension.

[0035] Specifically, such as Figure 1 and Figure 6 As shown, take two assembled bridges and divide them into groups A and B. Remove the H-shaped extension steel beam 3 and support leg 4 on the left side of group A. Then adjust the position of the H-shaped extension steel beam 3 in group B to extend it to a suitable length. Then insert it into the empty area on the left side of the channel steel 1 on the side of group A. Rotate the ball screw 502 to make it engage with the corresponding ball nut 511. Drive bolts along the first connecting screw hole 601 and the second connecting screw hole 602 for reinforcement. The ball screw 502 and the ball nut 511 also play a traction role.

[0036] Working principle: When using this utility model, firstly, the side channel steel 1 and splicing components 2 constitute the main steel frame of the bridge. The H-shaped extension steel beam 3 and support legs 4 increase strength and serve as bottom support. The support legs 4 of appropriate length can be selected and installed as needed. During erection, the main steel frame can be partially extended according to the width of the river channel. The manual crank handle 508 is inserted into the crank handle insertion hole 507 on the limiting ring 506, and the spline head 509 is inserted into the spline sleeve 505. At this time, cranking the manual crank handle 508 will drive the second helical gear 504 to rotate. The second helical gear 504 is driven by the first helical gear 503, and the ball screw 502 rotates at a constant speed. The ball screw 502 and the ball nut 511 cooperate to push the H-shaped extension steel beam 3 to extend outward along the inside of the side channel steel 1. It is more flexible in use and does not require welding or installation of additional structures. The side channel steel 1, splicing component 2, H-shaped extension steel beam 3, and support leg 4 can be transported separately. During assembly, the H-shaped support steel beam 201 is fastened to the top of the side channel steel 1, and the gap between the outer fixing block 202 and the inner support block 203 fits into the side channel steel 1. The fastening bolts 204 are then driven in for further reinforcement. The overall installation is convenient. Then, the H-shaped extension steel beam 3 is inserted along the side of the side channel steel 1. When the adjustments at both ends are insufficient to span the current river channel, another set of assembled bridges is taken and divided into two groups, A and B. The H-shaped extension steel beam 3 and support leg 4 on the left side of group A are removed. Then, the position of the H-shaped extension steel beam 3 in group B is adjusted so that it extends to a suitable length. Then, it is inserted into the empty area on the left side of the channel steel 1 on the side of group A. The ball screw 502 is rotated to make it engage with the corresponding ball nut 511. Bolts are driven in along the first connecting bolt eye 601 and the second connecting bolt eye 602 for reinforcement. The ball screw 502 and the ball nut 511 also play a traction role.

[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A rapid-assembly steel-concrete composite bridge structure, comprising splicing components (2), extension components (5), connecting components (6), and two sets of side channel steels (1), characterized in that: H-shaped extension steel beams (3) are inserted into both sides of the side channel steel (1), and the bottom end of the H-shaped extension steel beams (3) is bolted with support legs (4). The extension assembly (5) includes two sets of bearing seats (501), which are welded and fixed to the front and rear ends of the side channel steel (1) respectively. A ball screw (502) is laterally movably connected inside the bearing seat (501). A first helical gear (503) is fixedly connected to the end of the ball screw (502). A second helical gear (504) is movably connected to the top end of the side channel steel (1). A spline sleeve (505) is fixedly connected to the bottom end of the second helical gear (504). Two sets of limiting rings (506) are fixedly connected to the bottom end of the side channel steel (1). The limiting ring (506) has a crank handle insertion hole (507) inside. A manual crank handle (508) is inserted into the crank handle insertion hole (507) from bottom to top. A spline head (509) is welded and fixed to the top of the manual crank handle (508). The left and right sides of the H-shaped extension steel beam (3) are respectively provided with screw pre-reserved grooves (510). Ball nuts (511) are fixedly connected to the left and right sides of the H-shaped extension steel beam (3).

2. The rapidly assembled steel-concrete composite bridge structure according to claim 1, characterized in that: The external shape and size of the H-shaped extended steel beam (3) are adapted to the internal shape and size of the side channel steel (1), and the H-shaped extended steel beam (3) can slide left and right along the inside of the side channel steel (1).

3. The rapidly assembled steel-concrete composite bridge structure according to claim 1, characterized in that: The first helical gear (503) and the second helical gear (504) mesh with each other, and the external thread of the ball screw (502) and the internal thread of the ball nut (511) are compatible.

4. The rapidly assembled steel-concrete composite bridge structure according to claim 1, characterized in that: The horizontal center lines of the ball screw (502), the screw groove (510), and the ball nut (511) coincide. The ball screw (502) passes through the ball nut (511) and extends into the interior of the screw groove (510). The inner diameter of the screw groove (510) is larger than the outer diameter of the ball screw (502).

5. A rapidly assembled steel-concrete composite bridge structure according to claim 1, characterized in that: The external shape and size of the spline head (509) are adapted to the internal shape and size of the spline sleeve (505), and the vertical center lines of the second helical gear (504), the spline sleeve (505), and the spline head (509) coincide.

6. A rapidly assembled steel-concrete composite bridge structure according to claim 1, characterized in that: The splicing assembly (2) includes multiple sets of H-shaped support steel beams (201). The multiple sets of H-shaped support steel beams (201) are respectively fixed to the top of the side channel steel (1) by bolts. The front and rear ends of the H-shaped support steel beams (201) are respectively welded and fixed with outer fixing blocks (202). The bottom end of the H-shaped support steel beams (201) is welded and fixed with two sets of inner support blocks (203). The inner longitudinal part of the outer fixing blocks (202) is fitted with fastening bolts (204).

7. A rapidly assembled steel-concrete composite bridge structure according to claim 6, characterized in that: The front and rear ends of the side channel steel (1) are respectively attached to the outer fixing block (202) and the inner support block (203), and the fastening bolt (204) passes through the outer fixing block (202) and extends into the interior of the side channel steel (1).

8. A rapidly assembled steel-concrete composite bridge structure according to claim 1, characterized in that: The connecting component (6) includes multiple sets of second connecting screw holes (602), which are respectively opened on the left and right sides of the front and rear sides of the H-shaped extension steel beam (3). Two sets of first connecting screw holes (601) are respectively opened on the left and right sides of the front and rear sides of the side channel steel (1). The size spacing of the first connecting screw holes (601) and the second connecting screw holes (602) corresponds one-to-one.

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