Guardrail structure at large-displacement expansion joint

Abstract

The utility model relates to the technical field of guardrails, in particular to a large-displacement expansion joint guardrail structure which comprises a first stand column and a second stand column which are installed at the ends of two adjacent beams respectively, a self-adaptive angle adjusting assembly is arranged on the right side of the first stand column, and a self-adaptive angle adjusting assembly is arranged on the left side of the second stand column. And a self-adaptive telescopic assembly is arranged between the two self-adaptive angle adjusting assemblies, the self-adaptive telescopic assembly comprises a plurality of fixed transverse pipes which are arranged up and down at equal intervals, and each fixed transverse pipe is slidably connected with a fixed transverse rod. According to the guardrail structure at the large-displacement expansion joint, a multi-stage rotating structure of the self-adaptive angle adjusting assembly is matched with the self-adaptive expansion assembly, so that the guardrail structure can adapt to up-and-down, front-and-back and left-and-right displacement of the bridge expansion joint at the same time, and the limitation that a traditional guardrail can only handle horizontal displacement is overcome; and the continuity and the overall protection capability of the guardrail are still kept under the condition of complex deformation.

Description

Technical Field

[0001] This utility model relates to the field of guardrail technology, specifically to the guardrail structure at expansion joints with large displacement. Background Technology

[0002] Various types of guardrails are typically installed on both sides of long-span bridges to ensure the safety of pedestrians and vehicles. Bridge guardrails are crucial facilities for ensuring traffic safety and must maintain continuity and integrity to effectively prevent accidents. Simultaneously, at the connection between long-span bridges and approach bridges, expansion joints capable of accommodating large displacements are required to meet the bridge's expansion and contraction requirements under conditions of temperature changes and load fluctuations. Since large-displacement expansion joints experience significant elongation and contraction under temperature variations, ensuring the continuity and integrity of the guardrails during large-displacement expansion and contraction, and guaranteeing their corresponding protective effect, is one of the current engineering challenges.

[0003] Patent CN219080074U discloses a guardrail connection structure for large displacement expansion joints, including: fixed uprights, telescopic crossbars, telescopic crossbars with guide grooves, a cover steel plate, and a bottom movable steel plate spanning the joint. A large displacement expansion joint is pre-reserved between the ends of two adjacent beams, and the bottom movable steel plate spans the large displacement expansion joint between the two beam ends. Fixed uprights are respectively provided on two adjacent beams, and a telescopic crossbar and a telescopic crossbar with guide grooves are horizontally provided between the fixed uprights on two adjacent beams. The cover steel plate is slidably connected to the guide grooves in the telescopic crossbars with guide grooves via fixing bolts. The beneficial effects of this utility model are: it effectively connects the guardrails between two adjacent beams into a whole; the length of the groove on the telescopic crossbar with guide grooves is set according to the stroke length of the large displacement expansion joint; when the width of the large displacement expansion joint changes and expands and contracts, the distance between the guardrail members changes accordingly, always maintaining high continuity and integrity.

[0004] In practical applications, the aforementioned existing technology allows for slippage of the crossbar and sleeve connection depth when the beam ends move due to thermal expansion and contraction. This design can adapt to the width changes of large-displacement expansion joints, thus ensuring the guardrail maintains continuity and integrity while providing good protection and meeting the requirements for large-displacement expansion and contraction. However, the function of this guardrail connection structure is mainly limited to adapting to horizontal displacement and cannot meet the multi-dimensional displacement requirements in certain special cases. For example, in the design of long-span bridges, vertical displacement may need to be addressed in some cases. This requirement typically arises when the bridge or its supporting structure moves up and down due to settlement, deformation, or other foundation problems. In this context, some special structures may also need to consider front-to-back displacement requirements. Therefore, proposing a guardrail structure for large-displacement expansion joints is particularly important for addressing these complex usage environments and practical needs, ensuring that the guardrail maintains efficient protection and structural stability even under multi-dimensional displacement conditions. Utility Model Content

[0005] The purpose of this utility model is to provide a guardrail structure for expansion joints with large displacement, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] The guardrail structure at large displacement expansion joints includes a first post and a second post installed at the ends of two adjacent beams. The first post supports the adaptive angle adjustment component and provides overall stability, while the second post symmetrically supports the adaptive angle adjustment component and works in conjunction with the first post to maintain structural continuity. Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the first column is provided with an adaptive angle adjustment component on the right side, and the second column is provided with an adaptive angle adjustment component on the left side. The adaptive angle adjustment component is used to adapt to the vertical and front-back displacement of the bridge expansion joint.

[0008] An adaptive telescopic component is provided between the two adaptive angle adjustment components. The adaptive telescopic component is used to adapt to the left and right displacement of the bridge expansion joint by horizontal telescopic expansion. The adaptive telescopic component includes multiple fixed horizontal tubes arranged at equal intervals. The fixed horizontal tubes are used to provide sliding tracks for the fixed horizontal bars. Each fixed horizontal tube is slidably connected to a fixed horizontal bar. The fixed horizontal bar is used to slide within the fixed horizontal tube to achieve the horizontal telescopic function.

[0009] The adaptive angle adjustment component includes a strip-shaped vertical plate, which serves as a base plate for mounting a first U-shaped seat. Three first U-shaped seats are arranged equidistantly on the side of the strip-shaped vertical plate away from the adaptive expansion joint. Each first U-shaped seat is connected to an adaptive connector via a pin to achieve vertical rotation. The first U-shaped seat is rotatably connected to the adaptive connector, which adapts to multi-dimensional displacement through a multi-stage rotation structure. A second U-shaped seat is rotatably connected to the end of the adaptive connector away from the first U-shaped seat. The second U-shaped seat is connected to the adaptive connector via a pin to achieve forward and backward rotation. The adaptive connector can rotate vertically and horizontally relative to the first and second U-shaped seats, thereby adapting to the vertical and forward / backward expansion and contraction of the bridge expansion joint.

[0010] Preferred, such as Figure 1 As shown, both the first and second columns are provided with mounting bases at their bottoms. The mounting bases are installed on the bridge by bolts, and the mounting bases fix the columns to the bridge foundation by bolts to enhance the connection strength.

[0011] The left end of the fixed horizontal tube is bolted to the right side of the left strip vertical plate, and the right end of the fixed horizontal bar is bolted to the left side of the right strip vertical plate.

[0012] Preferred, such as Figure 5 As shown, the opening of the first U-shaped seat is vertically arranged. The vertical opening of the first U-shaped seat is designed to limit the vertical rotation of the adaptive connector. A first mounting plate is provided on the side of the first U-shaped seat near the strip vertical plate. The first mounting plate is installed on the side of the strip vertical plate by bolts. The first mounting plate fixes the first U-shaped seat to the side of the strip vertical plate by bolts.

[0013] The adaptive connector includes a first rectangular connecting block, one end of which is rotatably connected to a first U-shaped seat via a pin. The first rectangular connecting block is used to connect to the first U-shaped seat and transmit vertical displacement.

[0014] The first rectangular connecting block has a U-shaped connecting block at one end away from the first U-shaped seat. The U-shaped connecting block is connected to the second rectangular connecting block by a pin to achieve up and down rotation. The opening of the U-shaped connecting block is vertically set. The U-shaped connecting block is rotatably connected to the second rectangular connecting block by a pin. The second rectangular connecting block is used to connect to the second U-shaped seat and transmit front and back displacement.

[0015] The opening of the second U-shaped seat is horizontally set, and the end of the second rectangular connecting block away from the U-shaped connecting block is rotatably connected to the second U-shaped seat through a pin.

[0016] The second U-shaped seat has a second mounting plate on the side away from the second rectangular connecting block. The second mounting plate on the left is bolted to the right side of the first column, and the second mounting plate on the right is bolted to the left side of the second column.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. The guardrail structure at the large displacement expansion joint, through the multi-stage rotation structure of the adaptive angle adjustment component and the adaptive expansion component, can simultaneously adapt to the vertical, front-back and left-right displacement of the bridge expansion joint, which solves the limitation of traditional guardrails that can only handle horizontal displacement, and ensures that the guardrail maintains continuity and overall protection capability under complex deformation conditions.

[0019] 2. The guardrail structure at the large displacement expansion joint adopts a bolt connection method of mounting base, first mounting plate and second mounting plate, which facilitates quick assembly and disassembly on site, reduces construction difficulty, and facilitates later maintenance or component replacement.

[0020] 3. The guardrail structure at the large displacement expansion joint, through the sliding cooperation of the fixed horizontal tube and the fixed horizontal bar, and the multi-directional rotation design of the adaptive connector, can still maintain dynamic balance when the bridge expansion joint undergoes large displacement, avoiding deformation or breakage caused by stress concentration. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the overall left-right telescopic structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the overall front-to-back telescopic structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the overall vertical telescopic structure of this utility model;

[0025] Figure 5 This is a partial structural schematic diagram of the adaptive angle adjustment component in this utility model;

[0026] Figure 6 This is a schematic diagram of the adaptive telescopic component structure in this utility model;

[0027] In the diagram: 1. First column; 2. Second column; 3. Mounting base; 4. Adaptive angle adjustment component; 40. Strip vertical plate; 41. First U-shaped seat; 410. First mounting plate; 42. Second U-shaped seat; 420. Second mounting plate; 43. Adaptive connector; 430. First rectangular connecting block; 431. U-shaped connecting block; 432. Second rectangular connecting block; 5. Adaptive telescopic component; 50. Fixed horizontal tube; 51. Fixed horizontal bar. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] Please see Figures 1-6 This utility model provides a technical solution:

[0031] The guardrail structure at large displacement expansion joints includes a first post 1 and a second post 2 installed at the ends of two adjacent beams. The first post 1 supports the adaptive angle adjustment component 4 and provides overall stability. The second post 2 symmetrically supports the adaptive angle adjustment component 4 and works in conjunction with the first post 1 to maintain structural continuity. Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the right side of the first column 1 is provided with an adaptive angle adjustment component 4, and the left side of the second column 2 is provided with an adaptive angle adjustment component 4. The adaptive angle adjustment component 4 is used to adapt to the vertical and front-back displacement of the bridge expansion joint.

[0032] An adaptive telescopic component 5 is provided between the two adaptive angle adjustment components 4. The adaptive telescopic component 5 is used to adapt to the left and right displacement of the bridge expansion joint by horizontal telescopic expansion. The adaptive telescopic component 5 includes multiple fixed horizontal tubes 50 arranged vertically at equal intervals. The fixed horizontal tubes 50 are used to provide sliding tracks for the fixed horizontal bars 51. Each fixed horizontal tube 50 is slidably connected to a fixed horizontal bar 51. The fixed horizontal bar 51 is used to slide within the fixed horizontal tube 50 to achieve the horizontal telescopic function.

[0033] The adaptive angle adjustment component 4 includes a strip vertical plate 40, which serves as a base plate for mounting the first U-shaped seat 41. Three first U-shaped seats 41 are arranged vertically and equidistantly on the side of the strip vertical plate 40 away from the adaptive expansion component 5. The first U-shaped seats 41 are connected to the adaptive connector 43 by a pin to achieve vertical rotation. The first U-shaped seats 41 are rotatably connected to the adaptive connector 43. The adaptive connector 43 adapts to multi-dimensional displacement through a multi-stage rotation structure. The end of the adaptive connector 43 away from the first U-shaped seat 41 is rotatably connected to the second U-shaped seat 42. The second U-shaped seat 42 is connected to the adaptive connector 43 by a pin to achieve forward and backward rotation. The adaptive connector 43 can rotate up and down and forward and backward relative to the first U-shaped seat 41 and the second U-shaped seat 42, thereby adapting to the vertical expansion and backward expansion of the bridge expansion joint.

[0034] When the bridge expansion joint expands and contracts to the left and right, the working state of the guardrail structure at the large displacement expansion joint is as follows: Figure 2 As shown, when the bridge expansion joint expands and contracts, the working state of the guardrail structure at the large displacement expansion joint is as follows: Figure 3 As shown, when the bridge expansion joint expands and contracts vertically, the working state of the guardrail structure at the large displacement expansion joint is as follows: Figure 4 As shown.

[0035] In this embodiment, as Figure 1 As shown, the bottom of the first column 1 and the second column 2 are both provided with mounting bases 3. The mounting bases 3 are installed on the bridge by bolts. The mounting bases 3 fix the columns to the bridge foundation by bolts to enhance the connection strength.

[0036] The left end of the fixed horizontal tube 50 is bolted to the right side of the left strip vertical plate 40, and the right end of the fixed horizontal bar 51 is bolted to the left side of the right strip vertical plate 40.

[0037] Specifically, such as Figure 5As shown, the opening of the first U-shaped seat 41 is vertically arranged. The vertical opening of the first U-shaped seat 41 is designed to limit the vertical rotation of the adaptive connector 43. A first mounting plate 410 is provided on the side of the first U-shaped seat 41 near the strip vertical plate 40. The first mounting plate 410 is installed on the side of the strip vertical plate 40 by bolts. The first mounting plate 410 fixes the first U-shaped seat 41 to the side of the strip vertical plate 40 by bolts.

[0038] The adaptive connector 43 includes a first rectangular connector 430, one end of which is rotatably connected to the first U-shaped seat 41 via a pin. The first rectangular connector 430 is used to connect to the first U-shaped seat 41 and transmit vertical displacement.

[0039] The first rectangular connecting block 430 has a U-shaped connecting block 431 at one end away from the first U-shaped seat 41. The U-shaped connecting block 431 is connected to the second rectangular connecting block 432 through a pin to achieve up and down rotation. The opening of the U-shaped connecting block 431 is vertically set. The U-shaped connecting block 431 is rotatably connected to the second rectangular connecting block 432 through a pin. The second rectangular connecting block 432 is used to connect to the second U-shaped seat 42 and transmit front and back displacement.

[0040] The opening of the second U-shaped seat 42 is horizontally set, and the end of the second rectangular connecting block 432 away from the U-shaped connecting block 431 is rotatably connected to the second U-shaped seat 42 through a pin.

[0041] The second U-shaped seat 42 is provided with a second mounting plate 420 on the side away from the second rectangular connecting block 432. The second mounting plate 420 on the left is installed on the right side of the first column 1 by bolts, and the second mounting plate 420 on the right is installed on the left side of the second column 2 by bolts.

[0042] In this embodiment, the guardrail structure for large displacement expansion joints is installed by first fixing the mounting base 3 to the foundation positions of the two adjacent beam ends of the bridge using bolts. Then, adaptive angle adjustment components 4 are installed on the left side of the second column 2 and the right side of the first column 1 using bolts. Each adaptive angle adjustment component 4 has a strip-shaped vertical plate 40 serving as a base plate. A first U-shaped seat 41 is fixed to the side of the strip-shaped vertical plate 40 via a first mounting plate 410, and a second U-shaped seat 42 is fixed to the side of the first column 1 or the second column 2 via a second mounting plate 420. The first U-shaped seat 41 of the adaptive angle adjustment component 4 is rotatably connected to the first rectangular connecting block 430 of the adaptive connector 43 via a pin to transmit vertical displacement. Simultaneously, the U-shaped connecting block 431 of the adaptive connector 43 is rotatably connected to the second rectangular connecting block 432 via a pin to achieve vertical displacement. The second rectangular connecting block 432 is then rotatably connected to the second U-shaped seat 42 via a pin to achieve forward and backward rotation, thus completing a multi-stage rotation structure. After the installation of the adaptive angle adjustment component 4 is completed, the adaptive telescopic component 5 is installed between the two strip vertical plates 40, so that the fixed crossbar 51 is inserted into the corresponding fixed cross tube 50 to form a sliding fit. The left ends of multiple fixed cross tubes 50 are fixed to the right side of the left strip vertical plate 40 with bolts, and the right end of the fixed crossbar 51 is fixed to the left side of the right strip vertical plate 40 with bolts. When the bridge expansion joint moves left or right due to temperature changes or load fluctuations, the fixed crossbar 51 slides in the fixed cross tube 50 to adapt to horizontal expansion and contraction. When the bridge moves up and down or forward and backward, the adaptive connector 43 adjusts the angle through the rotation of the first rectangular connecting block 430, the U-shaped connecting block 431 and the second rectangular connecting block 432, thereby ensuring the continuity and dynamic balance of the overall structure of the guardrail.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. Guardrail construction at a large displacement expansion joint, comprising a first upright (1) and a second upright (2) mounted on the end portions of two adjacent beams, respectively, characterized in that: The right side of the first stand (1) is provided with an adaptive angle adjusting assembly (4), the left side of the second stand (2) is provided with an adaptive angle adjusting assembly (4), and the adaptive angle adjusting assemblies (4) are provided with an adaptive telescopic assembly (5), the adaptive telescopic assembly (5) comprises a plurality of fixed horizontal pipes (50) arranged equidistantly in up and down directions, each fixed horizontal pipe (50) is slidably connected with a fixed horizontal rod (51), the adaptive angle adjusting assembly (4) comprises a strip-shaped vertical plate (40), one side of the strip-shaped vertical plate (40) away from the adaptive telescopic assembly (5) is provided with three first U-shaped seats (41) arranged equidistantly in up and down directions, the first U-shaped seat (41) is rotatably connected with an adaptive connecting piece (43), one end of the adaptive connecting piece (43) away from the first U-shaped seat (41) is rotatably connected with a second U-shaped seat (42).

2. The guardrail construction at large displacement expansion joint according to claim 1, characterized in that: The bottom of the first stand (1) and the second stand (2) is provided with a mounting base (3), and the mounting base (3) is mounted on the bridge through bolts.

3. The guardrail construction at large displacement expansion joint according to claim 1, characterized in that: The left end of the fixed horizontal pipe (50) is mounted on the right side of the left strip-shaped vertical plate (40) through bolts, and the right end of the fixed horizontal rod (51) is mounted on the left side of the right strip-shaped vertical plate (40) through bolts.

4. The guardrail construction at large displacement amount expansion joint according to claim 1, characterized by: The opening of the first U-shaped seat (41) is vertically arranged, and one side of the first U-shaped seat (41) close to the strip-shaped vertical plate (40) is provided with a first mounting plate (410), and the first mounting plate (410) is mounted on the side surface of the strip-shaped vertical plate (40) through bolts.

5. The guardrail construction at large displacement movement expansion joint according to claim 1, characterized in that: The adaptive connecting piece (43) comprises a first rectangular connecting block (430), and one end of the first rectangular connecting block (430) is rotatably connected with the first U-shaped seat (41) through a pin shaft.

6. The guardrail construction at a large displacement expansion joint according to claim 5, characterized in that: One end of the first rectangular connecting block (430) away from the first U-shaped seat (41) is provided with a U-shaped connecting block (431), the opening of the U-shaped connecting block (431) is vertically arranged, and the U-shaped connecting block (431) is rotatably connected with a second rectangular connecting block (432) through a pin shaft.

7. The guardrail construction at a large displacement expansion joint according to claim 6, characterized in that: The opening of the second U-shaped seat (42) is horizontally arranged, and one end of the second rectangular connecting block (432) away from the U-shaped connecting block (431) is rotatably connected with the second U-shaped seat (42) through a pin shaft.

8. The guardrail construction at large displacement expansion joint according to claim 7, characterized in that: One side of the second U-shaped seat (42) away from the second rectangular connecting block (432) is provided with a second mounting plate (420), the left second mounting plate (420) is mounted on the right side of the first stand (1) through bolts, and the right second mounting plate (420) is mounted on the left side of the second stand (2) through bolts.

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