Prefabricated segment of assembled bridge and construction method

Abstract

The present application relates to a prefabricated segment of an assembled bridge and a construction method, belonging to the field of building construction technology. The prefabricated segment includes a segment body, an auxiliary channel is provided through the middle of the segment body; a first shear key is fixedly provided at one end of the segment body, and a first shear groove is provided at the other end of the segment body for plugging and cooperating with the first shear key; a connecting hole is provided on the inner wall of the auxiliary channel, which is connected to the first shear groove, and a clamping column is slidably connected in the connecting hole, the first shear key is provided with a clamping groove, and an adjustment component is provided in the auxiliary channel to drive the end of the clamping column to be inserted into the clamping groove. The present application uses the adjustment component to allow the end of the clamping column to be inserted into the clamping groove, thereby reducing the possibility of the first shear key falling off from the first shear groove, so that the first shear key can better transmit the shear force between the two adjacent segment bodies, and effectively increase the connection strength between the segment bodies.

Description

Technical Field

[0001] The present application relates to the field of building construction technology, and in particular to a prefabricated segment of an assembled bridge and a construction method. Background Art

[0002] Prefabricated and assembled bridges conform to the concepts of green, environmental protection, and sustainable development. They are particularly suitable for urban bridge construction in sections with complex traffic conditions where long-term traffic interruptions are not suitable, as well as highway bridge construction in difficult environments such as deep canyon areas where long-term on-site construction is not suitable. They are an important development direction for future bridge engineering construction.

[0003] As a superior and rapid construction method, precast segmental assembly technology is gaining increasing attention and recognition from owners, construction companies, and research institutes. In current precast segmental concrete pier construction, to ensure pier integrity, segmental component connection methods such as grouting sleeves, grouting bellows, socket-and-socket joints, and cast-in-place wet joints are commonly used, placing high demands on on-site positioning and operation.

[0004] With respect to the above-mentioned related technologies, the inventors believe that the following defects exist: the connection between each assembled segment is a weak point under stress, which is easily damaged by stress, thereby affecting the intrinsic quality and service life of the bridge. Summary of the Invention

[0005] In order to effectively increase the connection strength between segments, the present application provides a prefabricated segment of an assembled bridge and a construction method.

[0006] The first object of this application is to provide a prefabricated segment of an assembled bridge, which adopts the following technical solution:

[0007] A prefabricated segment of an assembled bridge comprises a segment body, wherein an auxiliary channel is provided through the middle of the segment body; a first shear key is fixedly provided at one end of the segment body, and a first shear groove which is plugged into and cooperates with the first shear key is provided at the other end of the segment body; a connecting hole which is connected to the first shear groove is provided on the inner wall of the auxiliary channel, a clamping column is slidably connected in the connecting hole, a clamping groove is provided on the first shear key, and an adjustment component which drives the end of the clamping column to be inserted into the clamping groove is provided in the auxiliary channel.

[0008] By adopting the above technical solution, the first shear key cooperates with the first shear groove to position two adjacent prefabricated segment bodies, thereby fixing the relative positions of the adjacent segment bodies and ensuring the integrity of the prefabricated bridge. At the same time, the shear force between the two adjacent segment bodies can be accurately transmitted. By adjusting the assembly so that the end of the clamping column is inserted into the clamping groove, the possibility of the first shear key falling out of the first shear groove is reduced, allowing the first shear key to better transmit the shear force between the two adjacent segment bodies, effectively increasing the connection strength between the segment bodies.

[0009] Optionally, there are two first shear keys, which are respectively located on the upper and lower sides of the auxiliary channel on the segment body; the adjustment assembly includes two screws and a sleeve, and the two screws are threadedly connected to the two threaded sections of the sleeve with opposite rotation directions; a positioning groove is provided on the clamping column toward one end of the screw, and a positioning block is fixed on the end face of the screw and is plugged into the positioning groove.

[0010] By adopting the above technical solution, the upper and lower first shear keys can better transmit the shear force between the two adjacent segment bodies, making the connection between the adjacent segment bodies more stable; through the cooperation of the positioning block and the positioning groove, the screw can be prevented from rotating with the sleeve. Rotating the sleeve makes the two screws approach or move away from each other, thereby pushing the end of the clamping column into the clamping groove, which makes the movement of the clamping column more convenient and the structure simple.

[0011] Optionally, a mounting groove connected to the communicating hole is provided on the inner wall of the auxiliary channel, and a water-stop sealing ring is fixedly installed in the mounting groove.

[0012] By adopting the above technical solution, the installation groove can accommodate the water-stop sealing ring, reducing the water-stop sealing ring from falling off the inner wall of the auxiliary channel; the water-stop sealing ring can reduce the entry of sewage into the clamping groove and the first shear groove, thereby reducing the corrosion of the clamping column and the first shear key, and further ensuring the connection strength between the segment bodies.

[0013] Optionally, the water-stop sealing ring adopts an elastic sealing ring, the inner wall of the water-stop sealing ring is provided with a limiting groove, and the side of the clamping column is fixedly connected with a limiting block that is clamped with the limiting groove; the end face of the water-stop sealing ring facing the sleeve is provided with an inclined groove, and the inclined surface of the inclined groove faces the inner wall of the water-stop sealing ring.

[0014] By adopting the above technical solution, the limit block cooperates with the limit groove, which can reduce the situation where the clamping column slips out of the clamping groove, so that the first shear key can better connect the two adjacent segment bodies; when the screw pushes the clamping column to move in the connecting hole, the limit block will press against the inclined surface of the inclined groove and cause the water-stop sealing ring to deform outward, making it easier for the limit block to be clamped in the limit groove and convenient to operate.

[0015] Optionally, the sleeve includes a first half ring, a second half ring and a fixing member, one side of the first half ring is hinged to one side of the second half ring, and the fixing member is used to fix the free end of the first half ring and the free end of the second half ring.

[0016] By adopting the above technical solution, the first half ring and the second half ring can be separated from the two screws, thereby separating the two screws from the clamping column; that is, after the end of the clamping column is inserted into the clamping groove, the adjustment assembly can be removed from the clamping column, reducing the impact of the existence of the adjustment assembly on the installation of other pipes or equipment in the auxiliary channel.

[0017] Optionally, the fixing member includes a sub-buckle and a female buckle, the sub-buckle is fixedly arranged at the free end of the first half ring, the female buckle is fixedly arranged at the free end of the second half ring, and the sub-buckle is snap-fitted with the female buckle.

[0018] By adopting the above technical solution, the sub-buckle and the female buckle cooperate to connect the free end of the first half ring with the free end of the second half ring, making it easier for the two screws to move closer to or away from each other when the sleeve is rotated.

[0019] Optionally, a plurality of second shear keys and a third shear key are fixedly provided at one end of the segment body, and a second shear groove for plugging into and mating with the second shear key and a third shear groove for plugging into and mating with the third shear key are provided at the other end; the second shear key is located on both sides of the first shear key on the segment body, and the third shear key is located on both sides of the auxiliary channel on the segment body.

[0020] By adopting the above technical solution, the presence of the second shear key and the third shear key can better transmit the shear force between two adjacent segment bodies, effectively increasing the connection strength between the segment bodies.

[0021] Optionally, the first shear key, the second shear key and the third shear key all have trapezoidal cross-sections, and the heights of the first shear key, the second shear key and the third shear key are all greater than twice the particle size of the concrete coarse aggregate used in the segment body.

[0022] By adopting the above technical solution, when two adjacent segment bodies are butt-jointed, the first shear key can be more easily inserted into the first shear groove, the second shear key can be more easily inserted into the second shear groove, and the third shear key can be more easily inserted into the third shear groove; at the same time, using twice the particle size of the concrete coarse aggregate can ensure the structural strength of the first shear key, the second shear key and the third shear key.

[0023] Another object of the present application is to provide a construction method for prefabricated segments of an assembled bridge, which adopts the following technical solution:

[0024] A construction method for prefabricated segments of an assembled bridge comprises the following steps:

[0025] Hoist the N1 segment body and install it on the prefabricated bridge pier;

[0026] Hoist the N2 segment body, keeping the axis direction of the N2 segment body aligned with the axis direction of the N1 segment body;

[0027] Insert the first shear key of the N2 segment body into the first shear groove of the N1 segment body;

[0028] An adjustment assembly is used to insert the end of the clamping column into the clamping groove.

[0029] By adopting the above technical solution, the first shear key cooperates with the first shear groove to position two adjacent prefabricated segment bodies, thereby fixing the relative positions of the adjacent segment bodies and ensuring the integrity of the prefabricated bridge. At the same time, the shear force between the two adjacent segment bodies can be accurately transmitted. By adjusting the assembly so that the end of the clamping column is inserted into the clamping groove, the possibility of the first shear key falling out of the first shear groove is reduced, allowing the first shear key to better transmit the shear force between the two adjacent segment bodies, effectively increasing the connection strength between the segment bodies.

[0030] In summary, this application includes at least one of the following beneficial technical effects:

[0031] 1. The first shear key, in conjunction with the first shear groove, can position two adjacent prefabricated segments, thereby fixing the relative positions of the adjacent segments and ensuring the integrity of the prefabricated bridge. At the same time, it can accurately transmit the shear force between the two adjacent segments. By adjusting the assembly so that the end of the clamping column is inserted into the clamping groove, the first shear key is less likely to fall out of the first shear groove, allowing the first shear key to better transmit the shear force between the two adjacent segments, effectively increasing the connection strength between the segments.

[0032] 2. The positioning block and the positioning groove cooperate to prevent the screw from rotating with the sleeve. Rotating the sleeve makes the two screws move closer to or away from each other, thereby pushing the end of the clamping column into the clamping groove. This makes the movement of the clamping column more convenient and the structure simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic structural diagram of a prefabricated segment of an assembled bridge according to an embodiment of the present application;

[0034] Figure 2 This is a schematic structural diagram of the other end of the segment body in an embodiment of the present application;

[0035] Figure 3 This is a schematic structural diagram of the adjustment assembly, the clamping column, and the water-stop sealing ring in an embodiment of the present application;

[0036] Figure 4 It is a partial cross-sectional view of the clamping column and the water-stop sealing ring in the embodiment of the present application.

[0037] Explanation of the accompanying drawings: 1. Segment body; 2. Auxiliary channel; 3. First shear key; 4. First shear groove; 5. Connecting hole; 6. Snap-in column; 7. Snap-in groove; 8. Adjustment assembly; 81. Screw; 82. Sleeve; 821. First half ring; 822. Second half ring; 823. Sub-buckle; 824. Female buckle; 9. Positioning groove; 10. Positioning block; 11. Installation groove; 12. Water-stop sealing ring; 13. Limiting groove; 14. Limiting block; 15. Inclined groove; 16. Second shear key; 17. Third shear key; 18. Second shear groove; 19. Third shear groove. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of this application more clear, the following Figure 1-4 It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application.

[0039] An embodiment of the present application discloses a prefabricated segment of an assembled bridge.

[0040] Reference Figure 1 and Figure 2The prefabricated segment of the bridge includes a segment body 1, and an auxiliary channel 2 is provided through the middle of the segment body 1; a first shear key 3 is fixedly provided at one end of the segment body 1, and a first shear groove 4 is provided at the other end of the segment body 1 to be plugged into and matched with the first shear key 3. There are two first shear keys 3, and the two first shear keys 3 are respectively located on the upper and lower sides of the auxiliary channel 2 on the segment body 1. In this embodiment, the first shear key 3 is integrally formed when the segment body 1 is prefabricated. By cooperating with the first shear key 3 and the first shear groove 4, the two adjacent prefabricated segment bodies 1 can be positioned, thereby fixing the relative positions of the adjacent segment bodies 1 and ensuring the integrity of the prefabricated bridge; at the same time, the shear force between the two adjacent segment bodies 1 can be accurately transmitted.

[0041] It should be noted that prefabricated, assembled bridges offer green and sustainable advantages over traditional rubber bridge construction methods. The foundation of prefabricated, green construction is standardized design. Parameters such as bridge span and deck width are categorized and statistically analyzed, reducing the number and type of prefabricated formwork for piers, cap beams, and segmental beams, as well as the type and number of prefabricated construction machinery. In this embodiment, the length of the segment body 1 is 2.5-4 meters, and the weight is 100-150 tons. For segments located on curves with a small curve radius and excessive longitudinal length, the length of the segment body 1 can be appropriately reduced.

[0042] Reference Figure 1 and Figure 2 In order to effectively increase the connection strength between the segment bodies 1, a plurality of second shear keys 16 and third shear keys 17 are fixedly provided at one end of the segment body 1, and a second shear groove 18 that plugs and cooperates with the second shear keys 16 and a third shear groove 19 that plugs and cooperates with the third shear key 17 are formed at the other end; the second shear keys 16 are located on both sides of the first shear key 3 on the segment body 1, and the third shear key 17 is located on both sides of the auxiliary channel 2 on the segment body 1. In this embodiment, the second shear keys 16 and the third shear keys 17 are integrally formed when the segment bodies 1 are prefabricated. The second shear keys 16 and the third shear keys 17 can better transmit the shear force between two adjacent segment bodies 1, effectively increasing the connection strength between the segment bodies 1.

[0043] Reference Figure 1 and Figure 2To facilitate the assembly of two adjacent segment bodies 1, the first shear key 3, the second shear key 16, and the third shear key 17 all have trapezoidal cross-sections. The heights of the first shear key 3, the second shear key 16, and the third shear key 17 are all greater than twice the particle size of the concrete coarse aggregate used in the segment body 1. In this embodiment, the trapezoidal cross-sections of the first shear key 3, the second shear key 16, and the third shear key 17 are angled at 45 degrees, which allows for better shear force transmission between the two segment bodies 1. When the two adjacent segment bodies 1 are butt-jointed, the first shear key 3 can be more easily inserted into the first shear groove 4, the second shear key 16 can be more easily inserted into the second shear groove 18, and the third shear key 17 can be more easily inserted into the third shear groove 19. The particle size of concrete coarse aggregate refers to the largest particle size of coarse aggregate. Using twice the particle size of concrete coarse aggregate can ensure the structural strength of the first shear key 3, the second shear key 16, and the third shear key 17.

[0044] Reference Figure 2 and Figure 3 The inner wall of the auxiliary channel 2 is provided with a connecting hole 5 that communicates with the first shear groove 4. A clamping column 6 is slidably connected to the connecting hole 5. The first shear key 3 is provided with a clamping groove 7. An adjustment assembly 8 is provided in the auxiliary channel 2 to drive the end of the clamping column 6 into the clamping groove 7. The adjustment assembly 8 includes two screws 81 and a sleeve 82. The two screws 81 are threadedly connected to the two threaded sections of the sleeve 82 with opposite rotation directions. The clamping column 6 has a positioning groove 9 on one end facing the screw 81. The end surface of the screw 81 is fixedly provided with a positioning block 10 that plugs into the positioning groove 9. In this embodiment, the positioning block 10 is fixed to the end face of the screw 81 by welding. The positioning block 10 cooperates with the positioning groove 9 to prevent the screw 81 from rotating along with the sleeve 82. Rotating the sleeve 82 makes the two screws 81 approach or move away from each other, thereby pushing the end of the clamping column 6 into the clamping groove 7. This makes the movement of the clamping column 6 more convenient and the structure simple.

[0045] Reference Figure 2 and Figure 3 To remove the adjustment assembly 8 from the clamping column 6, the sleeve 82 includes a first half-ring 821, a second half-ring 822, and a fixing member. One side of the first half-ring 821 is hingedly connected to one side of the second half-ring 822. The fixing member is used to securely connect the free end of the first half-ring 821 with the free end of the second half-ring 822. In this embodiment, the first half-ring 821 and the second half-ring 822 can be separated from the two screws 81, thereby separating the two screws 81 from the clamping column 6. That is, after the end of the clamping column 6 is inserted into the clamping groove 7, the adjustment assembly 8 can be removed from the clamping column 6, thereby reducing the impact of the adjustment assembly 8 on the installation of other pipes or equipment in the auxiliary channel 2.

[0046] Reference Figure 2 and Figure 3 The fixing member includes a sub-clasp 823 and a female clasp 824. The sub-clasp 823 is fixed to the free end of the first half ring 821 by a screw, and the female clasp 824 is fixed to the free end of the second half ring 822 by a screw. The sub-clasp 823 and the female clasp 824 are engaged with each other. In this embodiment, the fixing member adopts a snap-fit ​​structure. The sub-clasp 823 and the female clasp 824 cooperate to connect the free end of the first half ring 821 with the free end of the second half ring 822, so that the two screws 81 can be moved closer or farther away from each other when the sleeve 82 is rotated.

[0047] Reference Figure 3 and Figure 4 To reduce corrosion of the connecting column 6 and the first shear key 3, a mounting groove 11 is provided on the inner wall of the auxiliary channel 2, communicating with the connecting hole 5. A water-stop seal 12 is fixedly installed in the mounting groove 11. In this embodiment, the water-stop seal 12 is fixed in the mounting groove 11 with strong glue. The water-stop seal 12 is an elastic seal. The mounting groove 11 can accommodate the water-stop seal 12, reducing the water-stop seal 12 from falling off the inner wall of the auxiliary channel 2. The water-stop seal 12 can also reduce the ingress of sewage into the connecting groove 7 and the first shear groove 4, thereby reducing corrosion of the connecting column 6 and the first shear key 3 and further ensuring the connection strength between the segment bodies 1.

[0048] Reference Figure 3 and Figure 4 In order to facilitate the engagement of the limit block 14 in the limit groove 13, the inner wall of the water-stop seal ring 12 is provided with a limit groove 13, and the side of the clamping column 6 is fixedly connected with the limit block 14 that engages with the limit groove 13; the end surface of the water-stop seal ring 12 facing the sleeve 82 is provided with an inclined groove 15, and the inclined surface of the inclined groove 15 faces the inner wall of the water-stop seal ring 12. In this embodiment, the limit block 14 is fixed to the side of the clamping column 6 by welding. The cooperation between the limit block 14 and the limit groove 13 can reduce the possibility of the clamping column 6 slipping out of the connecting hole 5, thereby better connecting the first shear key 3 to the two adjacent segment bodies 1; when the screw 81 pushes the clamping column 6 to move in the clamping groove 7, the limit block 14 will press against the inclined surface of the inclined groove 15, and cause the water-stop seal ring 12 to deform outward, facilitating the engagement of the limit block 14 in the limit groove 13, and convenient operation.

[0049] It should be noted that when the first shear key 3, the second shear key 16 and the third shear key 17 on the segment body 1 conflict with the prestressed channel on the segment body 1, for the segment body 1 with a thinner plate thickness, the first shear key 3, the second shear key 16 or the third shear key 17 at the conflicting position can be partially cancelled; for the segment body 1 with a thicker plate thickness, the first shear key 3, the second shear key 16 or the third shear key 17 can be retained, and the conflict can be avoided by locally reducing the first shear key 3, the second shear key 16 or the third shear key 17.

[0050] The implementation principle of a prefabricated segment of an assembled bridge in the embodiment of the present application is as follows: by cooperating with the first shear key 3 and the first shear groove 4, the two adjacent prefabricated segment bodies 1 can be positioned, thereby fixing the relative positions of the adjacent segment bodies 1 and ensuring the integrity of the assembled bridge; at the same time, the shear force between the two adjacent segment bodies 1 can be accurately transmitted. By adjusting the component 8 so that the end of the clamping column 6 is inserted into the clamping groove 7, the possibility of the first shear key 3 falling off from the first shear groove 4 is reduced, so that the first shear key 3 can better transmit the shear force between the two adjacent segment bodies 1, effectively increasing the connection strength between the segment bodies 1.

[0051] The present application also discloses a method for constructing a prefabricated segment of an assembled bridge, comprising the following steps:

[0052] Step S1: hoist the N1 segment body 1 and install the N1 segment body 1 on the prefabricated bridge pier.

[0053] Step S2 , hoisting the segment body 1 of No. N2, and keeping the axial direction of the segment body 1 of No. N2 aligned with the axial direction of the segment body 1 of No. N1.

[0054] Step S3 , inserting the first shear key 3 of the N2 segment body 1 into the first shear groove 4 of the N1 segment body 1 .

[0055] Step S4: Use the adjustment assembly 8 to insert the end of the clamping column 6 into the clamping groove 7.

[0056] The above are all preferred embodiments of the present application and are not intended to limit the scope of protection of this application. Unless otherwise specified, any feature disclosed in this specification (including the abstract and drawings) may be replaced by other equivalent or similar features. In other words, unless otherwise specified, each feature is merely an example of a series of equivalent or similar features.

Claims

1. A prefabricated segment of an assembled bridge, characterized in that: The invention comprises a segment body (1), wherein an auxiliary channel (2) is provided in the middle of the segment body (1); a first shear key (3) is fixedly provided at one end of the segment body (1), and a first shear groove (4) plug-fitted with the first shear key (3) is provided at the other end of the segment body (1); a connecting hole (5) connected to the first shear groove (4) is provided on the inner wall of the auxiliary channel (2), a clamping column (6) is slidably connected in the connecting hole (5), a clamping groove (7) is provided on the first shear key (3), and an adjusting component (8) is provided in the auxiliary channel (2) for driving the end of the clamping column (6) to be inserted into the clamping groove (7); An installation groove (11) communicating with the communication hole (5) is provided on the inner wall of the auxiliary channel (2), and a water-stop sealing ring (12) is fixedly provided in the installation groove (11); The water-stop sealing ring (12) is an elastic sealing ring, and a limiting groove (13) is provided on the inner wall of the water-stop sealing ring (12). A limiting block (14) that is engaged with the limiting groove (13) is fixedly connected to the side of the clamping column (6); an inclined groove (15) is provided on the end face of the water-stop sealing ring (12), and the inclined surface of the inclined groove (15) faces the inner wall of the water-stop sealing ring (12).

2. The prefabricated segment of an assembled bridge according to claim 1, characterized in that: There are two first shear keys (3), and the two first shear keys (3) are respectively located on the upper and lower sides of the auxiliary channel (2) on the segment body (1); the adjustment component (8) includes two screws (81) and a sleeve (82), and the two screws (81) and the sleeve (82) are threadedly connected in a one-to-one correspondence with two thread segments arranged with opposite internal thread rotation directions; a positioning groove (9) is provided on the clamping column (6) toward one end of the screw (81), and a positioning block (10) is fixedly provided on the end face of the screw (81) and is plugged into the positioning groove (9).

3. The prefabricated segment of an assembled bridge according to claim 2, characterized in that: The sleeve (82) comprises a first half ring (821), a second half ring (822) and a fixing member, one side of the first half ring (821) is hinged to one side of the second half ring (822), and the fixing member is used to fix the free end of the first half ring (821) and the free end of the second half ring (822).

4. The prefabricated segment of an assembled bridge according to claim 3, characterized in that: The fixing member comprises a sub-buckle (823) and a female buckle (824), wherein the sub-buckle (823) is fixedly arranged at the free end of the first half ring (821), and the female buckle (824) is fixedly arranged at the free end of the second half ring (822), and the sub-buckle (823) and the female buckle (824) are snap-fitted.

5. The prefabricated segment of an assembled bridge according to claim 1, characterized in that: One end of the segment body (1) is fixedly provided with a plurality of second shear keys (16) and a third shear key (17), and the other end is provided with a second shear groove (18) plug-fitted with the second shear key (16) and a third shear groove (19) plug-fitted with the third shear key (17); the second shear key (16) is located on both sides of the first shear key (3) on the segment body (1), and the third shear key (17) is located on both sides of the auxiliary channel (2) on the segment body (1).

6. The prefabricated segment of an assembled bridge according to claim 5, characterized in that: The first shear key (3), the second shear key (16) and the third shear key (17) all have trapezoidal cross-sections, and the heights of the first shear key (3), the second shear key (16) and the third shear key (17) are all greater than twice the particle size of the concrete coarse aggregate used in the segment body (1).

7. A construction method for a prefabricated segment of an assembled bridge according to any one of claims 1 to 6, characterized in that: The following steps are involved: Hoisting the N1 segment body (1), and installing the N1 segment body (1) on the prefabricated bridge pier; Hoisting the N2 segment body (1), keeping the axial direction of the N2 segment body (1) aligned with the axial direction of the N1 segment body (1); Insert the first shear key (3) of the N2 segment body (1) into the first shear groove (4) of the N1 segment body (1); An adjustment assembly (8) is used to insert the end of the clamping column (6) into the clamping groove (7).

Images