Quick-replaceable bridge expansion device and construction method thereof

Abstract

The invention provides a quickly-replaced bridge expansion device and a construction method thereof, and belongs to the technical field of expansion devices. The telescopic device comprises installation beam bodies arranged on the two sides of the expansion joint, and each installation beam body is provided with a telescopic assembly. Each telescopic assembly comprises an anchoring sleeve, an anchoring bolt and a comb plate, the anchoring sleeves are embedded into the corresponding mounting beam bodies, and the comb plates are connected with the anchoring sleeves through the anchoring bolts; the comb plates of the two telescopic assemblies are meshed with each other. By arranging the anchoring sleeve, when the comb plate is disassembled, the comb plate can be taken down by directly screwing the anchoring bolt, and the replacement process of the comb plate is simplified; the anchor bolt and the anchor sleeve are directly connected, so that the anchor bolt is prevented from being in direct contact with concrete, the situation that disassembly of the anchor bolt is affected by loosening of the concrete is avoided, the situation that the anchor bolt cannot be screwed to disassemble the comb plate is avoided, and the replacement efficiency of the comb plate is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of expansion devices, and in particular relates to a quick-replacement expansion device for a bridge and a construction method thereof. Background Art

[0002] The telescopic device achieves safety and stability of the bridge during telescopic deformation through the separation and telescopic performance of the structure, as well as the guiding function and sealing performance of the comb-tooth shape.

[0003] Under the long-term rolling and impact of the wheels, the comb plate will become loose, and the loosened tooth plate will cause damage to the concrete, loosening the surface concrete, causing the original L bolts to deform or break and the nuts to fall off, and the bolts or nuts cannot be loosened. When repairing the telescopic device, the comb plate cannot be removed by screwing the bolts. It is necessary to smash all the original concrete and cut the anchor bars before the comb plate can be removed. The entire replacement process is complicated and the replacement speed is slow. Summary of the invention

[0004] The purpose of this application is to provide a quick-replacement bridge expansion device and a construction method thereof to solve the above-mentioned technical problems existing in the prior art.

[0005] This application is implemented as follows: In the first aspect, an embodiment of the present application provides a quick-replacement bridge expansion device, including mounting beams arranged on both sides of the expansion joint, each mounting beam being equipped with a expansion assembly; the expansion assembly includes an anchor sleeve, an anchor bolt and a comb plate, the anchor sleeve is pre-embedded in the corresponding mounting beam, and the comb plate is connected to the anchor sleeve through the anchor bolt; the comb plates of the two sets of expansion assemblies are arranged to mesh with each other.

[0006] In the second aspect, an embodiment of the present application provides a construction method for a quickly replaced bridge expansion device, which is used to replace the expansion device provided by the embodiment of the first aspect. The specific construction steps include: loosening the anchor bolts, separating the comb plate and the anchor sleeve, and removing the comb plate; smashing the damaged concrete on the installation beam, and cleaning the smashed concrete; pouring high-strength concrete towards the smashed position on the installation beam; using anchor bolts to connect the new comb plate to the anchor sleeve.

[0007] The technical solution adopted by the present invention can achieve the following beneficial effects: In the present application, an anchor sleeve is embedded in the installation beam body, and the comb plate is fixed to the embedded sleeve by using anchor bolts. When the comb plate is disassembled, the comb plate can be removed by directly turning the anchor bolts, thereby simplifying the replacement process of the comb plate. The direct connection between the anchor bolts and the anchor sleeve is used to avoid direct contact between the anchor bolts and the concrete, thereby preventing the loosening of the concrete from affecting the removal of the anchor bolts, and avoiding the situation where the anchor bolts cannot be turned to remove the comb plate, thereby improving the replacement efficiency of the comb plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0009] Figure 1 is a cross-sectional view of a telescopic device provided in some embodiments of the present application Figure 1 ; Figure 2 This application is about Figure 1 Detailed view of point A; Figure 3 is a schematic diagram of the overall structure of the telescopic device provided in some embodiments of the present application; Figure 4 This is a schematic diagram of the structure of the anchor sleeve provided in some embodiments of the present application. Figure 1 ; Figure 5 This is a schematic diagram of the structure of the anchor sleeve provided in some embodiments of the present application. Figure 2 ; Figure 6 is a partial cross-sectional view of a telescopic device provided in some embodiments of the present application; Figure 7 is a partial structural schematic diagram of a telescopic device provided in some embodiments of the present application; Figure 8 is a cross-sectional view of a telescopic device provided in some embodiments of the present application Figure 2 .

[0010] In the figure: 100-installation beam, 110-high-strength concrete, 200-anchor sleeve, 210-anchor outer cylinder, 220-internal sleeve, 221-operation hole, 230-locating pin, 300-anchor bolt, 400-comb plate, 500-waterstop assembly, 600-stainless steel slide plate, 700-anti-loosening gasket. DETAILED DESCRIPTION

[0011] The following description provides many different embodiments or examples for implementing different features of the present invention. The components and arrangements described in the following specific examples are only used to simplify the present invention and are only used as examples, not to limit the present invention.

[0012] An embodiment of the present application provides a quick-replacement bridge expansion device, which can be quickly installed and quickly disassembled, thereby saving construction time.

[0013] refer to Figure 1 and Figure 3 As shown, the telescopic device provided in the embodiment of the present application includes a mounting beam 100 disposed on both sides of the expansion joint, and each mounting beam 100 is installed with a telescopic assembly. The mounting beam 100 is a concrete structure, which serves as the installation base of the telescopic assembly. The telescopic assembly and the mounting beam 100 are fixed in position, and two groups of telescopic assemblies are respectively located on both sides of the expansion joint, and the two groups of telescopic assemblies cooperate with each other to adapt to the changes of the expansion joint.

[0014] refer to Figure 1 As shown, each telescopic assembly includes an anchor sleeve 200, an anchor bolt 300 and a comb plate 400. The anchor sleeve 200 is pre-buried in the corresponding mounting beam body 100, and the comb plate 400 is connected to the anchor sleeve 200 through the anchor bolt 300. The anchor bolt 300 is passed through the corresponding mounting hole on the comb plate 400 and tightened into the anchor sleeve 200, so that the comb plate 400 can be fixed to the anchor sleeve 200; the anchor bolt 300 is loosened from the anchor sleeve 200, so that the connection between the comb plate 400 and the anchor sleeve 200 can be released, and the comb plate 400 can be removed.

[0015] The comb plates 400 of the two telescopic assemblies are meshed with each other. Figure 3 As shown, the two comb plates 400 mesh with each other to accommodate the size changes of the expansion joint.

[0016] In some embodiments, reference Figure 1 and Figure 3 As shown, a water stop assembly 500 is also connected between the two mounting beams 100. A stainless steel slide plate 600 is also installed between the comb plate 400 and the mounting beam 100, and the position of the stainless steel slide plate 600 is fixed by the anchor bolt 300. In some specific embodiments, an anti-loosening gasket 700 is also provided between the head of the anchor bolt 300 and the comb plate 400, see Figure 2 As shown, the anti-loosening gasket 700 is used to increase the friction between the head of the anchor bolt 300 and the comb plate 400 to prevent the anchor bolt 300 from loosening.

[0017] Compared with the structure of directly using L-shaped bolts to fix the comb plate 400 in the prior art, the telescopic device provided in the embodiment of the present application uses the connection between the anchor bolt 300 and the anchor sleeve 200 to fix the comb plate 400, and the installation and removal of the comb plate 400 are achieved by loosening or tightening the anchor bolt 300, thereby simplifying the replacement process of the comb plate 400 and improving the replacement efficiency of the comb plate 400. The anchor bolt 300 and the anchor sleeve 200 are directly connected to avoid direct contact between the anchor bolt 300 and the concrete, thereby avoiding the loosening of the concrete from affecting the removal of the anchor bolt 300, and avoiding the situation where the anchor bolt 300 cannot be screwed to remove the comb plate 400, thereby improving the replacement efficiency of the comb plate 400.

[0018] The present application also provides a construction method for a fast-replacement bridge device, which is used to replace the telescopic device provided in the above embodiment. The specific construction steps include: First, it is necessary to loosen the anchor bolts 300, release the connection between the comb plate 400 and the anchor sleeve 200, separate the comb plate 400 and the anchor sleeve 200, and remove the comb plate 400. One comb plate 400 is usually connected to multiple anchor bolts 300 and multiple anchor sleeves 200. It is necessary to loosen all the anchor bolts 300 on the comb plate 400 before the comb plate 400 can be removed. After long-term use, the structure of the comb plate 400 is damaged. The removed comb plate 400 can be repaired or directly discarded according to the degree of damage.

[0019] After the comb plate 400 is removed, the mounting beam 100 below the comb plate 400 is exposed. The damaged concrete on the mounting beam 100 is smashed, and the smashed concrete is cleaned to remove the concrete residue. After the damaged concrete on the mounting beam 100 is smashed and cleaned, the structure of the mounting beam 100 will change, affecting the position stability of the anchor sleeve 200 and other components connected to the mounting beam 100. In some embodiments, reference Figure 6 and Figure 7 As shown, the surface of the installation beam body 100 below the comb plate 400 and the surface of the installation beam body 100 exposed to the environment are damaged, and this part of the concrete needs to be smashed and cleaned.

[0020] Pour high-strength concrete 110 toward the smashed position on the installation beam 100, and use the high-strength concrete 110 to restore the structure of the installation beam 100. Figure 8 As shown, the connection stability between the anchor sleeve 200 and other components and the installation beam body 100 is stabilized, providing good installation conditions for the subsequent installation of the comb plate 400.

[0021] The new comb plate 400 is connected to the anchor sleeve 200 using the anchor bolts 300, and the comb plate 400 is re-fixed. The replacement of the comb plate 400 is completed.

[0022] During the replacement of the comb plate 400, only the damaged concrete on the installation beam 100 is smashed and cleaned, which reduces the amount of work and the required operation time. In addition, the high-strength concrete 110 is re-poured, and the high-strength concrete 110 hardens quickly, which can further reduce the construction period. When the telescopic device is replaced during construction, it is usually necessary to close the road section, which can reduce the construction period and the closure time of the road section, thereby reducing the impact of the construction on the normal use of the road section.

[0023] Furthermore, since the comb plate 400 of the telescopic device provided in the embodiment of the present application is directly connected to the anchor sleeve 200 through the anchor bolt 300, when the comb plate 400 is replaced, the anchor bolt 300 can be simply removed or installed, and the comb plate 400 can be removed and installed. The operation steps are simple and the whole process is convenient and fast. Compared with the structure of the prior art that uses L-shaped bolts to connect the comb plate 400, the embodiment of the present application is provided with an anchor bolt 300 to connect the comb plate 400, and the anchor bolt 300 can be removed smoothly, thereby increasing the speed of removing the comb plate 400 and avoiding the situation in the prior art that all concrete must be smashed and the anchor bars cut before the comb plate 400 can be removed. In addition, less concrete needs to be smashed, and less construction waste is generated.

[0024] In some preferred embodiments, reference Figure 4 and Figure 5 As shown, the anchor sleeve 200 includes an anchor outer cylinder 210 and an inner sleeve 220. The anchor outer cylinder 210 is pre-buried in the corresponding mounting beam body 100 and fixedly connected to the mounting beam body 100, the inner sleeve 220 is threadedly installed in the anchor outer cylinder 210 and fixed to the anchor outer cylinder 210, and the comb plate 400 is connected to the inner sleeve 220 through the anchor bolt 300.

[0025] When disassembling the comb plate 400, it is usually only necessary to loosen the anchor bolt 300 and remove the anchor bolt 300 from the built-in sleeve 220. However, since the telescopic device is used outdoors, due to external environmental factors such as weather, temperature, humidity, etc., as well as the impact of the vehicle, there is a certain probability that the anchor bolt 300 will break in the built-in sleeve 220, or other situations will occur where the anchor bolt 300 cannot be removed from the anchor sleeve 200.

[0026] If the anchor bolt 300 cannot be separated from the anchor sleeve 200, the concrete around the anchor sleeve 200 needs to be smashed before the comb plate 400 connected to the anchor bolt 300 can be removed from the installation beam body 100. In this regard, the embodiment of the present application sets the anchor sleeve 200 as an anchor outer cylinder 210 and an inner sleeve 220, and the anchor bolt 300 is connected to the inner sleeve 220. Even if the anchor bolt 300 cannot be separated from the inner sleeve 220, the construction personnel can still separate the inner sleeve 220 and the anchor outer cylinder 210, thereby releasing the connection between the comb plate 400 and the anchor sleeve 200, removing the comb plate 400, and avoiding the situation of smashing the concrete around the anchor sleeve 200. By dividing the anchor sleeve 200 into two parts, namely the anchor outer cylinder 210 and the inner sleeve 220, it can further avoid the situation that the anchor bolt 300 cannot be removed from the installation beam body 100.

[0027] During the specific construction process, since the comb plate 400 is laid on the surface of the installation beam 100 and is located on the top of the anchor sleeve 200, before operating the built-in sleeve 220, it is necessary to cut the comb plate 400 first, cut the comb plate 400, and also cut the structure such as the stainless steel slide plate 600 between the comb plate 400 and the installation beam 100, so that the end of the built-in sleeve 220 can be exposed to the outside, so that the construction personnel can operate the built-in sleeve 220, rotate the built-in sleeve 220, separate the built-in sleeve 220 and the anchor outer cylinder 210, separate the anchor bolt 300 located in the built-in sleeve 220 from the anchor outer cylinder 210, and install the new built-in sleeve 220 into the anchor outer cylinder 210, and then use the new anchor bolt 300 to fix the new comb plate 400 to the built-in sleeve 220.

[0028] When replacing the comb tooth plate 400, the structure of the old comb tooth plate 400 itself is damaged. Even if the old comb tooth plate 400 is cut, it will not affect the construction cost too much. Moreover, compared with cutting the comb tooth plate 400, the amount of work of smashing the concrete around the anchor sleeve 200 is larger and requires more construction time. Therefore, even if it is necessary to cut the comb tooth plate 400, compared with the existing construction method, it can save a certain amount of construction time.

[0029] There are many situations in which the anchor bolt 300 cannot be separated from the built-in sleeve 220. In some embodiments, the anchor bolt 300 is structurally intact, but due to accumulation of impurities or other reasons, the anchor bolt 300 is fixed in the built-in sleeve 220, and the anchor bolt 300 cannot rotate relative to the built-in sleeve 220. In this case, the anchor bolt 300 can be rotated, so that the built-in sleeve 220 and the anchor bolt 300 rotate synchronously, and the built-in sleeve 220 and the anchor outer cylinder 210 rotate relative to each other, and the built-in sleeve 220 and the anchor outer cylinder 210 are separated.

[0030] In other embodiments, there is a possibility that the anchor bolt 300 breaks in the anchor sleeve 200. In this case, the anchor bolt 300 can be separated from the mounting beam body 100 by rotating the inner sleeve 220 and separating the inner sleeve 220 and the anchor outer cylinder 210.

[0031] In the embodiment provided by the present application, the anchor sleeve 200 is configured to be composed of an inner and outer part. Even if the threaded structure inside the built-in sleeve 220 is damaged after long-term use of the telescopic device, the connection stability between the anchor bolt 300 and the anchor sleeve 200 can be ensured by replacing the built-in sleeve 220 without removing the entire anchor sleeve 200 from the mounting beam body 100, thereby omitting the process of smashing the concrete around the anchor sleeve 200 to disassemble the anchor sleeve 200, thereby further improving the replacement efficiency of the comb plate 400.

[0032] In some preferred embodiments, reference may be made to Figure 4 and Figure 5 As shown, in order to facilitate the construction personnel to operate the built-in sleeve 220, an operation hole 221 is provided at the end of the built-in sleeve 220 near the comb plate 400, and the operation hole 221 is used to adapt to an inner four-angle wrench or an inner hexagon wrench. Use an inner hexagon wrench or an inner four-angle wrench to insert the operation hole 221, twist the built-in sleeve 220, and control the built-in sleeve 220 to rotate relative to the anchor outer cylinder 210, so as to separate the built-in sleeve 220 and the anchor outer cylinder 210. Further preferably, two operation holes 221 are provided, and the two operation holes 221 are evenly distributed along the circumference of the built-in sleeve 220, so that the construction personnel can more easily operate the built-in sleeve 220 and drive the built-in sleeve 220 to rotate relative to the anchor outer cylinder 210.

[0033] The radial dimension of the head of the anchor bolt 300 is larger than the outer diameter of the built-in sleeve 220. When the anchor bolt 300 is connected to the built-in sleeve 220, the projection of the head of the anchor bolt 300 in the gravity direction covers the built-in sleeve 220. The head of the anchor bolt 300 is tightly pressed against the top of the built-in sleeve 220. The built-in sleeve 220 is subjected to greater force, thereby improving the sealing of the end of the built-in sleeve 220 and the components above it, such as the stainless steel slide plate 600, thereby reducing the interference of the threaded connection between the built-in sleeve 220 and the anchor outer cylinder 210 with external environmental factors, so as to ensure the stability of the threaded connection between the built-in sleeve 220 and the anchor outer cylinder 210 and reduce the probability of the built-in sleeve 220 being unable to be separated from the anchor outer cylinder 210.

[0034] The anchoring outer cylinder 210 has a threaded groove for installing the built-in sleeve 220, and the depth of the threaded groove is the same as the height of the built-in sleeve 220. After the built-in sleeve 220 is installed in place, the end of the built-in sleeve 220 is flush with the end of the anchoring outer cylinder 210. When the comb plate 400 and other components are subsequently installed, the built-in sleeve 220 is pressed tightly between the comb plate 400 and the anchoring sleeve 200, which can prevent the built-in sleeve 220 from loosening, thereby improving the stability of the connection between the anchoring sleeve 200 and the anchoring bolt 300, and improving the installation stability of the comb plate 400.

[0035] In some specific embodiments, the direction of the external thread of the internal sleeve 220 is the same as the direction of the internal thread of the internal sleeve 220. The external thread of the internal sleeve 220 is used for threaded connection with the anchoring outer cylinder 210, and the internal thread of the internal sleeve 220 is used for threaded connection with the anchoring bolt 300. The thread directions of the internal thread and the external thread are the same. When tightening the anchoring bolt 300, the internal sleeve 220 can be further tightened in the anchoring outer cylinder 210 to improve the installation stability of the comb plate 400.

[0036] In some preferred embodiments, an installation groove is provided at the end of the inner sleeve 220 close to the comb plate 400 and the end of the anchor outer cylinder 210 close to the comb plate 400, and the two installation grooves are connected to each other, and a positioning pin 230 is inserted between the two installation grooves. Figure 5 As shown, the relative position between the inner sleeve 220 and the anchor outer cylinder 210 is fixed by the positioning pin 230 to prevent the inner sleeve 220 from being twisted when the anchor bolt 300 is loosened.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A quick-change bridge expansion device, characterized in that: It comprises installation beams (100) arranged on both sides of the expansion joint, each of the installation beams (100) being installed with a telescopic assembly; The telescopic assembly comprises an anchor sleeve (200), an anchor bolt (300) and a comb plate (400); the anchor sleeve (200) is pre-buried in the corresponding installation beam body (100); and the comb plate (400) is connected to the anchor sleeve (200) via the anchor bolt (300); The comb plates (400) of the two groups of telescopic components are arranged to mesh with each other.

2. A quick-change bridge expansion device according to claim 1, characterized in that: The anchoring sleeve (200) comprises an anchoring outer cylinder (210) and an inner sleeve (220); the anchoring outer cylinder (210) is pre-buried in the corresponding mounting beam body (100); the inner sleeve (220) is threadedly mounted in the anchoring outer cylinder (210); and the comb plate (400) is connected to the inner sleeve (220) via the anchoring bolt (300).

3. A quick-change bridge expansion device according to claim 2, characterized in that: The direction of the external thread of the built-in sleeve (220) is the same as the direction of the internal thread of the built-in sleeve (220).

4. The quick-change bridge expansion device according to claim 2, characterized in that: An operating hole (221) is provided at the end of the built-in sleeve (220) close to the comb plate (400), and the operating hole (221) is used to fit a square wrench or a hexagon wrench.

5. The quick-change bridge expansion device according to claim 4, characterized in that: There are two operating holes (221), and the two operating holes (221) are evenly distributed along the circumference of the built-in sleeve (220).

6. The quick-change bridge expansion device according to claim 2, characterized in that: The radial dimension of the head of the anchor bolt (300) is greater than the outer diameter of the built-in sleeve (220).

7. The quick-change bridge expansion device according to claim 2, characterized in that: The anchoring outer cylinder (210) has a thread groove for mounting the built-in sleeve (220), and the depth of the thread groove is the same as the height of the built-in sleeve (220).

8. A construction method for a quick-change bridge expansion device, characterized in that: For replacing the telescopic device according to any one of claims 1 to 7, the specific construction steps include: Loosen the anchor bolt (300), separate the comb plate (400) and the anchor sleeve (200), and remove the comb plate (400); Breaking and smashing the damaged concrete on the installation beam body (100), and cleaning the broken concrete; pouring high-strength concrete toward the smashed position on the installation beam body (100); Attach the new comb plate (400) to the anchor sleeve (200) using the anchor bolts (300).

9. The construction method of a quick-change bridge expansion device according to claim 8, characterized in that: The anchoring sleeve (200) comprises an anchoring outer cylinder (210) and an inner sleeve (220); the anchoring outer cylinder (210) is pre-buried in the corresponding mounting beam body (100); the inner sleeve (220) is threadedly mounted in the anchoring outer cylinder (210); and the comb plate (400) is connected to the inner sleeve (220) via the anchoring bolt (300); When the anchor bolt (300) cannot be removed from the anchor sleeve (200), the comb plate (400) is cut to expose the end of the inner sleeve (220), separate the inner sleeve (220) from the anchor outer sleeve (210), and replace with a new inner sleeve (220), a new anchor bolt (300), and a new comb plate (400).

10. The construction method of a quick-change bridge expansion device according to claim 9, characterized in that: An operating hole (221) is provided at the end of the built-in sleeve (220) close to the comb plate (400). An inner hexagonal wrench or an inner square wrench is inserted into the operating hole (221) to twist the built-in sleeve (220) to separate the built-in sleeve (220) from the anchoring outer cylinder (210).

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