A connecting structure for bridge appendages

Abstract

The present invention relates to a connection structure for bridge accessory structures, including a first connecting rod and a sleeve for being embedded in a pier body. By embedding the sleeve inside the pier, the embedded sleeve will not interfere with the formwork, nor is it necessary to drill holes in the formwork of the pier, there is no need to position the hole opening position of the formwork, nor will it damage the formwork, and there will be no problem of formwork leakage caused by hole opening, effectively ensuring the integrity of the formwork and the aesthetics of the pier; moreover, the embedding of the sleeve has no impact on the installation and removal of the formwork, improving the convenience and safety of construction; the formwork construction and the pouring of the pier have no impact on the embedding of the sleeve, ensuring the effectiveness of the sleeve and the construction accuracy, and improving the convenience of later construction; after the formwork is removed, the convex block of the first connecting rod enters the installation hole through the groove of the sleeve to achieve connection, with high connection strength and good stability; the forms of the convex block and the installation hole are connected inside the sleeve and are not easily damaged.

Description

Technical Field

[0001] The present invention relates to the technical field of connection of bridge accessory structures, and particularly to a connection structure of bridge accessory structures. Background Art

[0002] During the operation stage of a bridge, it is necessary to regularly inspect the bridge piers and girders, promptly detect diseases and handle them to ensure the safety of the bridge. Currently, the commonly used method is that when constructing the bridge pier, U-shaped bolts are embedded inside the hollow pier and outside the top cap of the pier, and an angle steel bracket is connected. An angle steel stop block is set on the angle steel bracket and a steel grating tread plate is laid to form an inspection platform for facilitating bridge maintenance operations.

[0003] The method of embedding U-shaped bolts has the following problems:

[0004] (1) Before pouring the pier body, U-shaped bolts are embedded for installing the platform bracket. Since a certain length of the U-shaped bolts is exposed outside the pier wall of the bridge pier, holes need to be drilled at the corresponding positions of the pier formwork for installation. At the same time, it is relatively difficult to remove the pier formwork, and the formwork is prone to collide with the bracket during formwork removal, posing a greater safety risk.

[0005] (2) When removing the formwork, it is easy to touch the exposed part of the U-shaped bolts, causing damage to the bolt threads and making it difficult to install the later platform bracket.

[0006] (3) There are many holes in the formwork, and slurry leakage is likely to occur at the hole openings. After the formwork is removed, it affects the appearance quality of the pier body.

[0007] The above problems cause the exposed part of the embedded U-shaped bolts to be unusable. When installing the angle steel bracket of the inspection platform, it is necessary to re-drill holes and install expansion bolts, which is likely to damage the pier reinforcement, has a certain impact on the force and appearance of the pier body, and is difficult to ensure safety, with a large workload, high construction difficulty, and difficult quality control. Summary of the Invention

[0008] The purpose of the present invention is to provide a connection structure of bridge accessory structures for the problem that in the prior art, when using the method of embedding U-shaped bolts to connect bridge accessory structures, the formwork of the bridge pier needs to be drilled, and there will be interference between the formwork installation and removal and the embedded U-shaped bolts, resulting in slurry leakage at the formwork hole openings, difficult formwork installation and removal, and easy damage to the bolt threads of the U-shaped bolts due to collision with the formwork.

[0009] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0010] A connecting structure for bridge accessory structures, comprising a first connecting rod and a sleeve for being embedded in a pier body. One end of the sleeve has a through hole along its axial direction, and the other end has a circular mounting hole. The through hole is adjacent to and communicates with the mounting hole. The aperture of the through hole at the connection with the mounting hole is smaller than the aperture of the mounting hole. The end of the sleeve with the mounting hole is a closed end. At least one groove is provided on the outer side of the through hole along the axial direction of the sleeve. The groove communicates with the through hole laterally and also communicates with the mounting hole. The closed end of the sleeve is connected to the pier reinforcement. The end face of the sleeve with the through hole is flush with the inner wall of the formwork. The through hole and the groove can be blocked by a blocking member, and the blocking member can be disassembled;

[0011] The first connecting rod includes an inner sleeve section, a protruding section, and a connecting section arranged in sequence from one end to the other end along its axial direction. The connecting section is used to connect the accessory structure. The inner sleeve section can enter the through hole. On the outer side of one end of the inner sleeve section away from the protruding section, there are protrusions corresponding to each groove. The protrusions can enter the mounting hole through the groove, and the protrusions can be rotated in the mounting hole and then fixed along the axial direction of the sleeve so that the first connecting rod is fixedly connected to the sleeve.

[0012] When using the connecting structure of the bridge accessory structure described in this solution, the sleeve is embedded in the pier body. When embedding the sleeve, the mounting hole at the closed end of the sleeve faces inwards and the other end faces outwards, so that the end of the through hole away from the mounting hole faces outwards and is flush with the inner wall of the formwork of the bridge pier. Therefore, the embedded sleeve will not interfere with the formwork, and there is no need to open holes in the formwork of the bridge pier, nor to position the hole opening position of the formwork, nor to damage the formwork, nor will there be a problem of formwork leakage caused by hole opening, effectively ensuring the integrity of the formwork and the aesthetics of the bridge pier. When embedding the sleeve, the through hole and the groove can be blocked by the blocking member. The blocking member blocks inside the through hole and the groove, and will not affect the installation of the formwork, that is, the embedding of the sleeve has no influence on the installation and removal of the formwork, improving the convenience and safety of construction. Moreover, the blocking of the through hole and the groove by the blocking member can prevent the mud from entering the through hole and the groove when pouring the bridge pier, avoiding the situation that the first connecting rod cannot enter the sleeve for connection, and the formwork will not cause extrusion and other damages to the connection part between the sleeve and the first connecting rod. That is, the formwork construction and the pouring of the bridge pier have no influence on the embedding of the sleeve, ensuring the effectiveness of the sleeve and the construction accuracy, and improving the convenience of later construction.

[0013] After the formwork is removed, the plugging member is removed to expose the through hole and the groove of the sleeve. Align the convex block of the first connecting rod with the corresponding groove of the sleeve, and insert the inner section of the first connecting rod into the through hole of the sleeve, so that the convex block of the first connecting rod enters the installation hole of the sleeve. Then, by rotating the first connecting rod, the convex block of the first connecting rod is clamped in the installation hole to form a fixation along the axial direction of the sleeve, so that the first connecting rod and the sleeve are fixedly connected. After the first connecting rod and the sleeve are connected, the convex block is located in the installation hole, the inner section is located in the through hole, and the extended section is located outside the pier wall of the pier, providing an installation distance for the connecting section. The connecting section is used to connect brackets, etc., and is used to connect bridge appendages. The connecting section can adopt a threaded connection form. Moreover, after the first connecting rod and the sleeve are connected, the through hole and the groove can be plugged again through the plugging member, which can protect the sleeve and prevent sundries from entering, resulting in the inability to disassemble the first connecting rod, and is convenient for replacement.

[0014] Moreover, the closed end of the sleeve is connected to the pier reinforcement, making the embedded effect of the sleeve better. The convex block of the first connecting rod is connected to the installation hole deep in the sleeve, resulting in high connection strength and good stability. And the form of the convex block and the installation hole is connected inside the sleeve and is not easily damaged.

[0015] Preferably, the dimension of the convex block along the length direction of the first connecting rod is adapted to the axial length of the installation hole, so that the convex block can be rotated when connecting the first connecting rod and the sleeve under manual force, so that the convex block and the installation hole form a limit. At the same time, it avoids the axial length of the installation hole being too long, resulting in the axial movement of the convex block in the installation hole, making the installation more convenient, the connection more stable, and the connection of the appendage structure safer.

[0016] Preferably, two grooves are provided in total in the circumferential direction of the through hole, and the two grooves are arranged oppositely; or four grooves are provided in total in the circumferential direction of the through hole, and the four grooves are distributed in a cross shape.

[0017] Adopting the above method, the connection ability is stronger and the connection is more stable.

[0018] Preferably, some or all of the grooves are divided into several size specifications, and the first connecting rod is provided with convex blocks adapted to each groove, so that the convex blocks with larger sizes cannot pass through the grooves with smaller sizes, which can enhance the connection strength and connection stability.

[0019] Preferably, the plugging member is a rubber plug, and the rubber plug is adapted to plug the through hole and the end of the groove close to the formwork, which is convenient for plugging and disassembling.

[0020] Preferably, the through hole and the installation hole are coaxially arranged, which is convenient for processing and the force is more uniform.

[0021] Preferably, the inner diameter of the through hole gradually decreases from the end far away from the mounting hole to the end close to the mounting hole, and the part of the inner sleeve section without the bump is adapted to the through hole.

[0022] According to the force-bearing characteristics of the first connecting rod, it should have properties such as shear resistance, bending resistance, and tensile resistance, and the load is the largest at the interface of the pier wall. Therefore, the part of the inner sleeve section of the first connecting rod without the bump can be considered in the form of a variable cross-section with the through hole of the sleeve, so that the diameter of the first connecting rod at the interface of the pier wall is larger and can bear a larger load.

[0023] Preferably, it further includes a second connecting rod. The second connecting rod includes a first threaded section, the protruding section, and the connecting section sequentially arranged from one end to the other end along its axis. The first threaded section is adapted to the through hole;

[0024] Threads are provided inside the through hole, and the first threaded section is threadedly connected to the through hole.

[0025] In this way, the sleeve can be connected through the mounting hole and the bump of the first connecting rod; it can also be threadedly connected through the first threaded section of the second connecting rod and the through hole of the sleeve. Generally, the second connecting rod is used to threadedly connect with the sleeve. When the internal thread of the through hole of the sleeve is damaged, the sleeve is then connected to the first connecting rod. This method avoids the need to use methods such as re-drilling and implanting steel bars, making the operation simpler, the construction more convenient, and being able to avoid damaging the bridge pier.

[0026] Preferably, the through hole is divided into a small inner diameter section and a large inner diameter section along its axis. The small inner diameter section is closer to the mounting hole than the large inner diameter section. The first threaded section is threadedly connected to the through hole, so the first threaded section correspondingly has a large outer diameter section and a small outer diameter section like the through hole. First, it can make the outer diameter of the first threaded section close to the pier wall large, be able to bear a larger load, and adapt to the situation where the load is the largest at the interface of the pier wall; second, it can provide two inner threads with different inner diameters so that they do not interfere with each other. Even if one section is damaged, the other section can still be used.

[0027] Preferably, the wall thickness of the large inner diameter section is equal to the wall thickness of the small inner diameter section, which is equivalent to the outer diameter of the large inner diameter section being larger than the outer diameter of the small inner diameter section, and can reduce the use of materials and save costs.

[0028] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present invention are:

[0029] 1. The connecting structure of the bridge accessory structure of the present invention has a pre-embedded sleeve inside the pier. The pre-embedded sleeve will not interfere with the formwork, and there is no need to drill holes in the formwork of the pier, nor to position the hole-opening position of the formwork, and it will not damage the formwork, nor will there be a problem of formwork leakage due to hole-opening, effectively ensuring the integrity of the formwork and the aesthetics of the pier; moreover, the pre-embedding of the sleeve has no impact on the installation and removal of the formwork, improving the convenience and safety of construction; the formwork construction and the pouring of the pier have no impact on the pre-embedding of the sleeve, ensuring the effectiveness of the sleeve and the construction accuracy, and improving the convenience of later construction; after the formwork is removed, the convex block of the first connecting rod enters the installation hole through the groove of the sleeve to achieve connection, with high connection strength and good stability; the form of the convex block and the installation hole is connected inside the sleeve and is not easily damaged.

[0030] 2. The connecting structure of the bridge accessory structure of the present invention enables the sleeve to be connected through the installation hole and the convex block of the first connecting rod; it can also be threadedly connected through the first threaded section of the second connecting rod and the through hole of the sleeve. Generally, the second connecting rod is used to threadedly connect with the sleeve. When the internal thread of the through hole of the sleeve is damaged, the sleeve is then connected with the first connecting rod. This method avoids the need to use methods such as re-drilling and implanting steel bars, making the operation simpler, the construction more convenient, and being able to avoid damaging the pier. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic structural diagram of the connecting structure of the bridge accessory structure described in Embodiment 1;

[0032] Figure 2 is a cross-sectional schematic view of the connecting structure of the bridge accessory structure of the present invention Figure 1 ;

[0033] Figure 3 is a pre-embedding schematic diagram of the connecting structure of the bridge accessory structure of the present invention;

[0034] Figure 4 is corresponding to the present invention Figure 2 schematic structural diagram of the first connecting rod;

[0035] Figure 5 is a cross-sectional schematic view of the connecting structure of the bridge accessory structure of the present invention Figure 2 ;

[0036] Figure 6 is corresponding to the present invention Figure 5 schematic structural diagram of the first connecting rod;

[0037] Figure 7 is a cross-sectional schematic view of the connecting structure of the bridge accessory structure of the present invention Figure 3 ;

[0038] Figure 8 is a schematic structural view of the first connecting rod corresponding to the present invention Figure 7 ;

[0039] Figure 9 is a schematic structural view of the connection structure of the bridge accessory structure described in Embodiment 2 Figure 1 ;

[0040] Figure 10 is a schematic structural view of the second connecting rod of the present invention

[0041] Figure 11 is a schematic structural view of the connection structure of the bridge accessory structure described in Embodiment 2 Figure 2 ;

[0042] Figure 12 is a schematic structural view of the connection structure of the bridge accessory structure described in Embodiment 2 Figure 3 ;

[0043] Figure 13 is a schematic view of the state where two sleeves of the present invention are embedded together

[0044] Icon: 1 - sleeve; 11 - through hole; 111 - first small inner diameter section; 112 - second small inner diameter section; 113 - large inner diameter section; 12 - mounting hole; 13 - groove; 2 - second connecting rod; 21 - first threaded section; 3 - first connecting rod; 31 - convex block; 32 - inner sleeve section; 33 - protruding section; 34 - second threaded section; 4 - pier body; 5 - pier wall; 61 - connecting steel bar; 62 - anchoring steel bar Detailed implementation manners

[0045] The present invention will be described in detail below with reference to the accompanying drawings

[0046] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention

[0047] Embodiment 1

[0048] This embodiment provides a connection structure for a bridge accessory structure. Referring to Figures 1-4 , it includes a first connecting rod 3 and a sleeve 1 for being embedded in a pier body 4

[0049] As Figures 1-2As shown in the figure, one end of the sleeve 1 has an axial through-hole 11, and the other end has a circular mounting hole 12. The through-hole 11 is adjacent to and communicates with the mounting hole 12. The aperture of the through-hole 11 at the connection with the mounting hole 12 is smaller than the aperture of the mounting hole 12. The end of the sleeve 1 with the mounting hole 12 is the closed end. At least one groove 13 is provided on the outer side of the through-hole 11 along the axial direction of the sleeve 1. The groove 13 communicates with the through-hole 11 laterally and also communicates with the mounting hole 12. The closed end of the sleeve 1 is connected to the steel bars of the pier body 4. The end face of the sleeve 1 with the through-hole 11 is flush with the inner wall of the formwork. The through-hole 11 and the groove 13 can be blocked by a plugging member, and the plugging member is detachable.

[0050] As Figure 4 shown in the figure, the first connecting rod 3 includes an inner sleeve section 32, a protruding section 33, and a connecting section arranged in sequence from one end to the other end along its axial direction. The connecting section is used to connect the accessory structure. In this embodiment, the connecting section is a second threaded section 34, which is connected to the bracket by threading, and the accessory structure of the bridge is connected through the bracket. The inner sleeve section 32 can enter the through-hole 11. On the outer side of one end of the inner sleeve section 32 away from the protruding section 33, there are protrusions 31 corresponding to each groove 13. Preferably, the part of the inner sleeve section 32 without the protrusions 31 can be adapted to the inside of the through-hole 11, making the connection between the first connecting rod 3 and the sleeve 1 more stable. The protrusions 31 can enter the mounting hole 12 through the grooves 13. The protrusions 31 can rotate in the mounting hole 12 and then be fixed along the axial direction of the sleeve 1, so that the first connecting rod 3 is fixedly connected to the sleeve 1. By rotating the first connecting rod 3, the protrusions 31 no longer correspond to the grooves 13, so the protrusions 31 cannot slide out of the grooves 13, forming a limit into the sleeve 1. Through the connection of the first connecting rod 3, the sleeve 1 pulls the protrusions 31.

[0051] In this embodiment, the length of the first connecting rod 3 is the length of the sleeve 1 plus the length of the exposed part connected to the bracket, that is, the inner sleeve section 32 corresponds to the length of the sleeve 1, and the protruding section 33 and the second threaded section 34 correspond to the length of the exposed part connected to the bracket. One end of the first connecting rod 3 is connected to the pre-embedded sleeve 1, and the other end is connected by bolts after passing through the reserved hole of the inspection platform bracket.

[0052] Using the connecting structure of the bridge accessory structure described in this solution, the sleeve 1 is pre-embedded in the pier body 4. When pre-embedding the sleeve 1, the mounting hole 12 at the closed end of the sleeve 1 faces inward and the other end faces outward, so that the end of the through hole 11 far from the mounting hole 12 faces outward and is flush with the inner wall of the formwork of the bridge pier without leaving a gap. Therefore, the pre-embedded sleeve 1 will not interfere with the formwork, there is no need to drill holes in the formwork of the bridge pier, there is no need to position the hole opening position of the formwork, the formwork will not be damaged, and there will be no problem of formwork leakage caused by hole opening, effectively ensuring the integrity of the formwork and the aesthetics of the bridge pier. When pre-embedding the sleeve 1, the through hole 11 and the groove 13 can be blocked by a blocking member. The blocking member blocks inside the through hole 11 and the groove 13, which will not affect the installation of the formwork, that is, the pre-embedding of the sleeve 1 has no influence on the installation and removal of the formwork, improving the convenience and safety of construction. Moreover, the blocking of the through hole 11 and the groove 13 by the blocking member can prevent the slurry from entering the through hole 11 and the groove 13 when pouring the bridge pier, avoiding the first connecting rod 3 from being unable to enter the sleeve 1 for connection, and the formwork will not cause extrusion and other damages to the connection part between the sleeve 1 and the first connecting rod 3, that is, both the formwork construction and the pouring of the bridge pier have no influence on the pre-embedding of the sleeve 1, ensuring the effectiveness and construction accuracy of the sleeve 1 and improving the convenience of later construction. Among them, the through hole 11 is preferably coaxially arranged with the mounting hole 12, which is convenient for processing and the force is more uniform.

[0053] After the formwork is removed, the plugging member is removed, so that the through hole 11 and the groove 13 of the sleeve 1 are exposed. The bump 31 of the first connecting rod 3 is aligned with the corresponding groove 13 of the sleeve 1, and the inner sleeve section 32 of the first connecting rod 3 is inserted into the through hole 11 of the sleeve 1, so that the bump 31 of the first connecting rod 3 enters the mounting hole 12 of the sleeve 1. Then, by rotating the first connecting rod 3, the bump 31 of the first connecting rod 3 is snapped into the mounting hole 12 to form a fixation along the axial direction of the sleeve 1, so that the first connecting rod 3 and the sleeve 1 are fixedly connected. Since the aperture of the connection between the through hole 11 and the mounting hole 12 is smaller than the aperture of the mounting hole 12, a convex platform for clamping and limiting the bump 31 can be formed. After the first connecting rod 3 and the sleeve 1 are connected, the bump 31 is located in the mounting hole 12, the inner sleeve section 32 is located in the through hole 11, and the extending section 33 is located outside the pier wall 5 of the pier, providing an installation distance for the connecting section. The connecting section is used to connect brackets, etc., and is used to connect bridge appendages. The connecting section can adopt a threaded connection form. Moreover, after the first connecting rod 3 and the sleeve 1 are connected, the through hole 11 and the groove 13 can be plugged again by the plugging member, which can protect the sleeve 1 and prevent sundries from entering, resulting in the inability to disassemble the first connecting rod 3, and is convenient for replacement. The plugging members for the two pluggings have different structures. The first time is mainly to block the sleeve 1, mainly because the through hole 11 and the groove 13 of the sleeve 1 need to be restored later so that the first connecting rod 3 can be connected; while the second time to block the sleeve 1 is after the sleeve 1 and the first connecting rod 3 are connected, and the inner sleeve section 32 of the first connecting rod 3 has entered the through hole 11 of the sleeve 1. The plugging member is preferably a rubber plug, and the rubber plug is adapted to plug the ends of the through hole 11 and the groove 13 close to the formwork, which is convenient for plugging and disassembling.

[0054] Moreover, the closed end of the sleeve 1 is connected to the steel bars of the pier body 4. As Figure 3 shown, the closed end of the sleeve 1 is connected by the anchoring steel bars 62 inside the pier body 4, so that the embedding effect of the sleeve 1 is better. The bump 31 of the first connecting rod 3 is connected to the mounting hole 12 deep inside the sleeve 1, so that the connection strength is high and the stability is good. Moreover, the form of the bump 31 and the mounting hole 12 is connected deep inside the sleeve 1 and is not easily damaged.

[0055] As Figure 1 and Figure 4 shown, the dimension of the bump 31 along the length direction of the first connecting rod 3 is adapted to the axial length of the mounting hole 12. For example, the length of the mounting hole 12 in the left-right direction is 2-3 mm larger than the vertical length of the bump 31, so that the bump 31 can be rotated when connecting the first connecting rod 3 and the sleeve 1 under the action of human force, so that the bump 31 and the mounting hole 12 form a limit. At the same time, it avoids the axial length of the mounting hole 12 being too long, resulting in the axial movement of the bump 31 in the mounting hole 12, making the installation more convenient, the connection more stable, and the connection of the appendages safer.

[0056] In this embodiment, as shown in Figure 2 and Figure 4 , the number of the bumps 31 can be one, and correspondingly, the number of the grooves 13 on the sleeve 1 is also one. As shown in Figures 5-6 , two grooves 13 are circumferentially arranged around the through hole 11, and the two grooves 13 are oppositely arranged. Correspondingly, the number of the bumps 31 on the first connecting rod 3 is also two, and the two bumps 31 are oppositely arranged on both sides of the inner sleeve section 32. As shown in Figures 7-8 , four grooves 13 are circumferentially arranged around the through hole 11, and the four grooves 13 are distributed in a cross shape. Correspondingly, the number of the bumps 31 on the first connecting rod 3 is also four, and the four bumps 31 are distributed in a cross shape on the four sides of the inner sleeve section 32. By uniformly arranging different numbers of bumps 31 and grooves 13, where the numbers of the bumps 31 and grooves 13 correspond, the bumps 31 can enter the mounting holes 12 from the corresponding grooves 13 to be stressed. Among them, the more the number of the bumps 31, the larger the stress area and the better the stress effect. Of course, it is also possible to adopt a situation where the number of the grooves 13 is greater than the number of the bumps 31, but this setting method has a worse effect compared with the grooves 13 and bumps 31 with equal numbers.

[0057] In addition, some or all of the grooves 13 can be divided into several size specifications, and the first connecting rod 3 is provided with the bumps 31 adapted to each groove 13, so that the larger-sized bumps 31 cannot pass through the smaller-sized grooves 13, which can enhance the connection strength and connection stability. For example, taking Figure 5 as an example, if the groove 13 on the left is small and the groove 13 on the right is large, the bump 31 corresponding to the groove 13 on the right will be larger than the groove 13 on the left. After rotating to the groove 13 on the left, clamping can also be achieved to form a tensile connection.

[0058] According to the stress characteristics of the first connecting rod 3, it should have properties such as shear resistance, bending resistance, and tensile resistance, and the load is the largest at the interface of the pier wall 5. Therefore, the part of the inner sleeve section 32 of the first connecting rod 3 where no bump 31 is provided and the through hole 11 of the sleeve 1 can be considered in the form of a variable cross-section, so that the diameter of the first connecting rod 3 at the interface of the pier wall 5 is larger and can bear a greater load. As shown in Figure 1 , the inner diameter of the through hole 11 gradually decreases from the end far from the mounting hole 12 to the end close to the mounting hole 12, and the part of the inner sleeve section 32 of the first connecting rod 3 where no bump 31 is provided is adapted to the through hole 11. In addition to the gradual change form in Figure 1 , it can also be in the form of a sudden change. Referring to Figure 11 and Figure 12 , the through hole 11 can be small at the left end and large at the right end; correspondingly, the inner sleeve section 32 of the first connecting rod 3 should also adopt an adapted sudden change structure.

[0059] Except for this, the length of the sleeve 1 is determined according to the force requirements of the connecting bracket. When the sleeve 1 is embedded, according to the connection setting of the inspection platform bracket, a single sleeve 1 can be embedded, or multiple sleeves 1 can be connected by the connecting steel bars 61 and then embedded to increase the integrity of the sleeve 1 and improve the safety of the connection. When the sleeve 1 is embedded, it needs to be connected to the steel bars of the pier body 4. When the connection structure of the above-mentioned bridge accessory structure is used for the bridge pier, there are generally several sleeves 1 together, so the following method can be adopted Figure 13 In this way, two or more of the sleeves 1 are connected by the connecting steel bars 61, and then the steel bars in the bridge pier, such as the circular steel bars in the bridge pier, are connected.

[0060] Embodiment 2

[0061] This embodiment provides a connection structure for a bridge accessory structure. On the basis of Embodiment 1, see Figures 9-10 , and further includes a second connecting rod 2. The second connecting rod 2 includes a first threaded section 21, the protruding section 33 and the connecting section arranged in sequence from one end to the other end along its axis. The first threaded section 21 is adapted to the through hole 11;

[0062] Threads are provided inside the through hole 11, and the first threaded section 21 is threadedly connected to the through hole 11.

[0063] In this embodiment, the length of the second connecting rod 2 is the length of the through hole 11 of the sleeve 1 plus the length of the exposed part connected to the bracket, that is, the first threaded section 21 corresponds to the length of the sleeve 1, and the protruding section 33 and the second threaded section 34 correspond to the length of the exposed part connected to the bracket. One end of the second connecting rod 2 is connected to the embedded sleeve 1, and the other end is connected by bolts after passing through the reserved hole at the inspection platform bracket.

[0064] In this way, the sleeve 1 can be connected through the mounting hole 12 and the convex block 31 of the first connecting rod 3; it can also be threadedly connected through the first threaded section 21 of the second connecting rod 2 and the through hole 11 of the sleeve 1. Generally, the second connecting rod 2 is used to threadedly connect with the sleeve 1. When the internal thread of the through hole 11 of the sleeve 1 is damaged, the sleeve 1 is connected to the first connecting rod 3. This method avoids the need to adopt methods such as redrilling and implanting steel bars, making the operation simpler, the construction more convenient, and avoiding damage to the bridge pier.

[0065] Except that, the through hole 11 can be axially divided into a small inner diameter section and a large inner diameter section 113. The small inner diameter section is closer to the mounting hole 12 than the large inner diameter section 113. The first threaded section 21 is threadedly connected to the through hole 11. Therefore, the first threaded section 21 is correspondingly provided with a large outer diameter section and a small outer diameter section like the through hole 11. One is that the outer diameter of the first threaded section 21 close to the pier wall 5 is large, which can bear a greater load and adapt to the situation where the load is the largest at the interface of the pier wall 5. The other is that it can provide two inner threads with different inner diameters so that they do not interfere with each other. Even if one section is damaged, the other section can still be used. As Figure 11 shown, the through hole 11 is divided into a first small inner diameter section 111 and a large inner diameter section 113. The outer diameter of the first small inner diameter section 111 is smaller than that of the large inner diameter section 113. If the wall thickness of the large inner diameter section 113 is equal to that of the small inner diameter section, it can reduce the use of materials and save costs. Of course, it can also be as Figure 12 shown, the through hole 11 is divided into a second small inner diameter section 112, and the outer diameter of the second small inner diameter section 112 is the same as that of the first small inner diameter section 111, which is convenient for processing.

[0066] In this embodiment, when embedding the sleeve 1, a rubber stopper is plugged at the outer opening of the sleeve 1 to prevent concrete from entering the sleeve 1 during construction and blocking it or damaging the internal threads of the sleeve barrel. After the formwork is removed, the outer opening of the sleeve 1 is flush with the concrete surface of the pier body 4. There is no need to open a hole in the formwork, and the construction is relatively simple and safe. After embedding the sleeve 1 with a combination of internal threads and notches, when installing the inspection platform bracket, use an ordinary construction board to screw the prefabricated threaded second connecting rod 2 into the embedded sleeve 1, and connect and fix the other side of the bracket to the other end of the threaded connecting rod with screws, thus completing the connection between the bracket and the pier body 4. If the internal threads of the embedded sleeve 1 are damaged and the threaded second connecting rod 2 cannot be screwed in, the first connecting rod 3 with a convex block 31 is used for connection. The form of the second connecting rod 2 can be selected as a single-point convex block 31, a straight convex block 31 or a cross convex block 31, etc., and the form needs to correspond to the reserved groove 13 of the embedded sleeve 1. The size of the convex block 31 is 1-2 mm smaller than the size of the reserved groove 13 to facilitate installation. After the first connecting rod 3 with a convex block 31 is matched with the embedded sleeve 1, it is inserted into the sleeve 1. After the end of the first connecting rod 3 reaches the bottom mounting hole 12 of the sleeve 1, it rotates to stagger the convex block 31 of the first connecting rod 3 from the notch of the embedded sleeve 1, and uses the extrusion between the convex block 31 and the sleeve 1 for connection.

[0067] According to the stress characteristics of the first connecting rod 3 and the second connecting rod 2, they should have the properties of shear resistance, bending resistance, and tensile resistance, and the load is the largest at the interface of the pier wall 5. Therefore, the first connecting rod 3, the second connecting rod 2 and the sleeve 1 can be considered in the form of variable cross-section. The diameter of the pre-embedded sleeve 1 at the pier wall 5 is large, and the diameter of the sleeve 1 is reduced in the form of a sudden change after a certain distance according to the force calculation. Two sleeves 1 of different diameters can be combined, or sleeves 1 with the same outer diameter and different inner diameters can be used to achieve the purpose of achieving two inner and outer inner diameter sizes. The sleeve 1 can also be in the form of an inner thread and a groove 13. The first connecting rod 3 and the second connecting rod 2 correspond to the sleeve 1, which is also in the form of a variable cross-section.

[0068] By adopting the embedded sleeve 1 and then adopting the first connecting rod 3 and the second connecting rod 2, the influence of the embedded U-bolt on the appearance of the formwork and the pier body 4 can be effectively avoided, and the embedded sleeve 1 can also achieve the effect of the U-bolt. At the same time, the first connecting rod 3 and / or the second connecting rod 2 can be easily replaced according to the usage in the later stage. After embedding, the embedded sleeve 1 is plugged with a rubber plug, which can effectively avoid the damage to the sleeve 1 during construction, and it is more convenient to remove the rubber plug when connecting. The embedded sleeve 1 with an inner thread and a groove 13 is adopted, and the matching second connecting rod 2 with a thread or the first connecting rod 3 with a protrusion 31 is selected. In the case that the inner thread of the sleeve 1 is damaged, the first connecting rod 3 with a protrusion 31 can be replaced, avoiding the need to use re-drilling and rebar embedding methods. After installation, the first connecting rod 3 with the protrusion 31 is rotated at a certain angle to achieve an extrusion connection between the protrusion 31 and the sleeve 1 when subjected to force. According to the connection and force requirements, a single-point protrusion 31, a straight-shaped protrusion 31 or a cross-shaped protrusion 31 can be used to effectively ensure the effect of the extrusion connection. According to the force requirements and characteristics, the sizes of the sleeve 1 and the connecting rod are selected in a targeted manner. The sleeve 1 and the connecting rod with a larger cross-sectional size are selected for the part with greater bearing capacity, and the sleeve 1 and the connecting rod with a smaller cross-sectional size are selected for the part with smaller bearing capacity. The variable cross-sectional form can be selected in a gradual or sudden manner, and the corresponding connecting rod is selected accordingly.

[0069] Construction steps:

[0070] 1. Select the embedded sleeve 1 according to the connection requirements, and weld the sleeve 1 to the reinforced connection member of the concrete;

[0071] 2. Before pouring the concrete pier body 4, the sleeve 1 is embedded and the opening of the sleeve 1 is blocked with a rubber plug;

[0072] 3. Pour concrete into the pier body 4. After the strength meets the requirements, prepare to install the bracket;

[0073] 4. Pull out the rubber plug at the sleeve 1, connect one end of the connecting rod to the sleeve 1, and seal the groove 13 at the opening of the sleeve 1 with the rubber plug;

[0074] 5. After the bracket is installed on the second threaded section 34 of the connecting rod by aligning the holes, a bolt is used to connect to the connecting rod to fix the bracket.

[0075] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A connecting structure for bridge appurtenances, characterized in that It includes a first connecting rod (3) and a sleeve (1) for being embedded in a pier body (4). One end of the sleeve (1) has a through hole (11) along its axial direction, and the other end has a circular mounting hole (12). The through hole (11) is adjacent to and communicates with the mounting hole (12). The aperture of the through hole (11) at the connection with the mounting hole (12) is smaller than the aperture of the mounting hole (12). The end of the sleeve (1) with the mounting hole (12) is a closed end. At least one groove (13) is provided on the outside of the through hole (11) along the axial direction of the sleeve (1). The groove (13) communicates with the through hole (11) laterally and also communicates with the mounting hole (12). The closed end of the sleeve (1) is connected to the pier body (4) steel bars. The end face of the sleeve (1) with the through hole (11) is used to be flush with the inner wall of the formwork. The through hole (11) and the groove (13) can be blocked by a blocking member, and the blocking member is detachable; The first connecting rod (3) includes an inner sleeve section (32), an extending section (33) and a connecting section arranged in sequence from one end to the other end along its axial direction. The connecting section is used to connect an accessory structure. The inner sleeve section (32) can enter the through hole (11). On the outer side of the end of the inner sleeve section (32) far from the extending section (33), there are convex blocks (31) corresponding to each groove (13). The convex blocks (31) can enter the mounting hole (12) through the groove (13). The convex blocks (31) can rotate in the mounting hole (12) and then be fixed along the axial direction of the sleeve (1) so that the first connecting rod (3) is fixedly connected to the sleeve (1); It further includes a second connecting rod (2). The second connecting rod (2) includes a first threaded section (21), the extending section (33) and the connecting section arranged in sequence from one end to the other end along its axial direction. The first threaded section (21) is adapted to the through hole (11); Threads are provided inside the through hole (11), and the first threaded section (21) is threadedly connected to the through hole (11).

2. The connecting structure of the bridge accessory structure according to claim 1, characterized in that, The dimension of the convex block (31) along the length direction of the first connecting rod (3) is adapted to the axial length of the mounting hole (12).

3. The connecting structure of the bridge accessory structure according to claim 1, characterized in that, A total of two grooves (13) are provided circumferentially on the through hole (11), and the two grooves (13) are arranged oppositely; Or a total of four grooves (13) are provided circumferentially on the through hole (11), and the four grooves (13) are distributed in a cross shape.

4. The connecting structure of the bridge accessory structure according to claim 3, characterized in that The grooves (13) are divided into several size specifications. The first connecting rod (3) is provided with convex blocks (31) adapted to each groove (13), and the larger convex blocks (31) cannot pass through the smaller grooves (13).

5. The connecting structure of the bridge accessory structure according to claim 1, characterized in that, The blocking member is a rubber plug, and the rubber plug is adapted to block the end of the through hole (11) and the groove (13) close to the formwork.

6. The connecting structure of the bridge accessory structure according to claim 1, characterized in that, The through hole (11) and the mounting hole (12) are coaxially arranged.

7. The connecting structure of the bridge accessory structure according to any one of claims 1-6, characterized in that, The inner diameter of the through hole (11) gradually decreases from the end far away from the mounting hole (12) to the end close to the mounting hole (12), and the part of the inner sleeve section (32) without the bump (31) is adapted to the through hole (11).

8. The connecting structure of the bridge accessory structure according to claim 1, characterized in that, The through hole (11) is axially divided into a small inner diameter section and a large inner diameter section (113), and the small inner diameter section is closer to the mounting hole (12) than the large inner diameter section (113).

9. The connecting structure of the bridge accessory structure according to claim 8, characterized in that, The wall thickness of the large inner diameter section (113) is equal to the wall thickness of the small inner diameter section.

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