Bridge anchoring device

By designing a bridge anchoring device with support blocks and a worm gear transmission system, the problem of the inability to adjust the height deviation of expansion joints in existing technologies has been solved, enabling rapid installation and disassembly and enhancing the stability and service life of bridge connections.

CN121781516APending Publication Date: 2026-04-03HEBEI UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-12-22
Publication Date
2026-04-03

AI Technical Summary

Technical Problem

The existing bridge anchorage devices and expansion joint installation structures are not perfect, which makes it impossible to adjust the height deviation of the expansion joints, affecting the normal use of the bridge.

Method used

Design a bridge anchoring device, including a support block and an adjustable-height support block. By adjusting the position of the support block on the anchoring plate, the splice plate can be quickly installed and disassembled. The height of the splice plate can be adjusted through a worm gear transmission system to reduce height error.

Benefits of technology

It enables rapid installation and disassembly of bridge anchorage devices, effectively adjusts the height difference of expansion joints, and enhances the stability and service life of bridge connections.

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Abstract

The invention provides a bridge anchoring device, and relates to the technical field of bridge anchoring. The connecting structure comprises splicing plates and inserting grooves, the number of the splicing plates is two, sawtooth-shaped structures on the two splicing plates are connected in an inserted mode, and when the connecting structure is used, the splicing plates are installed on the supporting blocks from top to bottom, the round rods in the rectangular grooves in the bottom sides of the splicing plates are inserted into the supporting blocks, and the telescopic blocks are clamped with the butt joint grooves. The splicing plate can be rapidly mounted on the anchoring plate, the push plate moves downwards by rotating the screw rod, the telescopic block is pushed out of the butt joint groove, the limiting effect of the telescopic block on the splicing plate can be lost, and therefore the effect of rapidly dismounting the splicing plate can be achieved; the problems that an existing mounting structure of a bridge anchoring structure and an expansion joint is imperfect, and the expansion joint and the anchoring structure are generally integrated during use, so that the expansion joint cannot be disassembled and maintained after an anchoring device is mounted on a bridge body are solved.
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Description

Technical Field

[0001] This invention relates to the field of bridge anchoring technology, and in particular to a bridge anchoring device. Background Technology

[0002] Bridge expansion joints are expansion joints installed between the ends of two beams, between the beam end and the abutment, or at the hinged joints of the bridge to accommodate bridge deck deformation. Both sides of the bridge expansion joint need to be connected to the bridge expansion joint through anchoring devices to strengthen the connection between the expansion joint and the bridge. The anchoring devices themselves also need to bear part of the stress of the bridge expansion joint. Therefore, the anchoring devices need to have high strength to prevent them from separating from the expansion joint when the expansion joint repeatedly expands and deforms, which would affect the connection between the expansion joint and the bridge and threaten the normal use of the bridge.

[0003] For example, application number CN201410679891.8 discloses an anchoring method and structure for a modular expansion joint of a bridge. This anchoring structure involves setting a connecting steel plate on the side beam of the modular expansion joint, with two transverse round steel bars passing through the connecting steel plate and fixed to the supporting beam box or displacement rod box. An adjustable anchoring steel plate with round holes passes through the two transverse round steel bars and can move freely along them. The adjustable anchoring steel plate is welded to pre-embedded reinforcing bars. Simultaneously, U-shaped anchoring reinforcing bars are welded to both sides of the supporting beam box or displacement rod box, and two transverse reinforcing bars pass through both the pre-embedded reinforcing bars and the U-shaped anchoring reinforcing bars, achieving the connection and anchoring of the transverse supporting beam box or displacement rod box with the pre-embedded reinforcing bars. This invention solves the problems of poor anchoring performance, difficult installation, and insufficient service life of existing modular expansion joints for bridges.

[0004] However, the existing bridge anchorage structure is not perfect in its installation structure with the expansion joint. In use, the expansion joint and the anchorage structure are usually integrated. Therefore, after the anchorage device is installed on the bridge body, the expansion joint cannot be disassembled and maintained. Moreover, the connection structure between the existing bridge anchorage device and the expansion joint is not perfect. Since the anchorage structure and the expansion joint are integrated, when there is a height deviation on both sides of the expansion joint or when the height difference between the two sets of expansion joints occurs due to long-term use, it is impossible to reduce the deviation by adjusting the height of one side of the expansion joint individually. Summary of the Invention

[0005] In view of this, the present invention provides a bridge anchoring device having a support block, which enables splice plates to be quickly installed onto anchoring plates via the support block, and allows for quick disassembly of the splice plates (expansion joints) in the later stages; and by setting an adjustable support block, the fixed position of the splice plates on the anchoring plates can be changed by adjusting the support block, thereby reducing the height error between the two sets of splice plates (expansion joints).

[0006] This invention provides a bridge anchoring device, specifically comprising: a connecting structure; the connecting structure includes splicing plates and slots, the splicing plates being provided in two sets, with serrated structures on the two sets of splicing plates interlocking, and a rectangular groove at the bottom outer side of the splicing plate, a round rod at the middle of the rectangular groove, and circular through holes at both ends of the splicing plate; the slot is located at the lower end of the splicing plate and extends through both sides of the splicing plate; the connecting structure is provided with an anchoring structure, the anchoring plate of the anchoring structure being located in the rectangular groove at the bottom outer side of the splicing plate; the anchoring structure is provided with a movable structure, the support block of the movable structure being slidably installed in a sliding groove within the anchoring plate, and the guide groove on the outer side of the support block being slidably connected to a locking block within the sliding groove, and the adjustment groove on the outer side of the support block being slidably connected to an adjustment block within the anchoring plate; a round rod is vertically inserted into the rectangular groove at the bottom side of the splicing plate within the support block, and a telescopic block within the support block is inserted into a mating groove within the splicing plate.

[0007] Furthermore, the connection structure also includes: a buffer plate and inserts; the buffer plate is located on the bottom side between the two sets of splicing plates, and the buffer plate is made of rubber; there are two sets of inserts, and the inserts are located on both sides of the buffer plate, and the inserts are inserted into the slots in the two sets of splicing plates.

[0008] Furthermore, the connection structure includes: a mating groove and a push plate; the mating groove is located inside the splicing plate, and a screw is rotatably installed in the middle of the mating groove; the push plate is slidably installed inside the upper end of the mating groove, and the push plate is threadedly connected to the screw inside the push plate.

[0009] Furthermore, the anchoring structure includes: an anchoring plate, an anchoring rod, and a worm gear; the anchoring plate is a rectangular structure, and round holes are equally spaced at both ends of the anchoring plate; the anchoring rod is inserted into the round holes at both ends of the anchoring plate; there are two sets of worm gears, and the worm gears are rotatably installed on the inner ends of both sides of the anchoring plate.

[0010] Furthermore, the anchoring structure includes: a sliding groove and a locking block; the sliding groove is located in the middle of the anchoring plate; there are two sets of locking blocks, which are symmetrically arranged on the upper ends of both sides of the sliding groove.

[0011] Furthermore, the anchoring structure includes: a movable groove and an adjusting block; there are two sets of movable grooves, which are symmetrically opened on both sides of the inner end of the anchoring plate, and the movable grooves are connected to the sliding groove; the adjusting block is slidably installed in the movable groove, and the wedge-shaped structure at the end of the adjusting block extends into the sliding groove.

[0012] Furthermore, the anchoring structure includes: a control screw and a worm gear; the control screw is rotatably installed inside the anchoring plate, and the reverse threads at both ends of the control screw are respectively threadedly connected to two sets of adjusting blocks; there are two sets of worm gears, and the worm gears are fixedly installed on both sides of the control screw, and the worm gears are connected to the worm gear in the anchoring plate via a transmission connection.

[0013] Furthermore, the movable structure includes: a support block, a guide groove, and an adjustment groove; the support block is a rectangular structure, and a vertical circular hole is opened in the middle of the support block; there are two sets of guide grooves, which are symmetrically opened on both sides of the support block and pass through the upper end of the support block; there are two sets of adjustment grooves, which are symmetrically opened on both sides of the bottom of the support block.

[0014] Furthermore, the movable structure includes: an inner groove and a telescopic block; there are two sets of inner grooves, and the inner grooves are symmetrically opened inside the support block; the telescopic block is slidably installed in the inner groove through an elastic element, and the end of the telescopic block extends out from the inner groove.

[0015] This invention provides a bridge anchoring device, which has the following beneficial effects: 1. This invention incorporates a connecting structure and a movable structure. A mating groove is created within the splicing plate, and a push plate is installed in the mating groove via a screw. The support block is then installed onto the anchor plate, and a movable telescopic block is provided within the support block. In use, the splicing plate is installed onto the support block from top to bottom, causing the circular rod in the rectangular groove on the bottom side of the splicing plate to insert into the support block, and the telescopic block to engage with the mating groove. This design allows for the rapid installation of the splicing plate on the anchor plate. By rotating the screw, the push plate moves downward, pushing the telescopic block out of the mating groove, thus removing the telescopic block's limiting effect on the splicing plate and enabling rapid disassembly of the splicing plate.

[0016] 2. This invention incorporates an anchoring structure and a movable structure. A support block is slidably installed within the anchoring plate, and two sets of adjusting blocks with wedge-shaped structures are movablely installed within the anchoring plate via a control screw. The ends of the adjusting blocks are slidably connected to the adjusting grooves. The worm gears at both ends of the control screw are connected to the worm gear within the anchoring plate. When a height difference occurs between the two splicing plates, rotating the worm gear causes the control screw to move the adjusting blocks within the adjusting grooves. This allows the support block to adjust the height of one side of the splicing plate on the anchoring plate, thereby reducing the height difference between the two sets of splicing plates. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below. The drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention.

[0018] In the attached diagram: Figure 1 A three-dimensional structural schematic diagram according to an embodiment of the present invention is shown.

[0019] Figure 2 The invention illustrates an embodiment of the invention by Figure 1 This leads to an enlarged structural diagram of part A.

[0020] Figure 3 A bottom view of the structure according to an embodiment of the present invention is shown.

[0021] Figure 4 An exploded structural diagram according to an embodiment of the present invention is shown.

[0022] Figure 5 A schematic diagram of the connection structure and the movable structure splicing according to an embodiment of the present invention is shown.

[0023] Figure 6 The invention illustrates an embodiment of the invention by Figure 5 A schematic diagram of the enlarged structure of part B is shown.

[0024] Figure 7 A schematic diagram of the connection between the anchoring structure and the movable structure according to an embodiment of the present invention is shown.

[0025] Figure 8 A partial cross-sectional schematic diagram of the anchoring structure and the movable structure according to an embodiment of the present invention is shown.

[0026] Figure 9 A partial cross-sectional view of the anchoring structure according to an embodiment of the present invention is shown.

[0027] Figure 10 A three-dimensional structural diagram of the connection structure according to an embodiment of the present invention is shown.

[0028] List of reference numerals 1. Connection structure; 101. Panel; 1011. Slot; 102. Buffer plate; 1021. Insert strip; 103. Connecting groove; 1031. Push plate; 2. Anchoring structure; 201. Anchor plate; 2011. Anchor rod; 2012. Worm gear; 202, Slide; 2021, Block; 203. Movable groove; 2031. Adjusting block; 204. Control screw; 2041. Worm gear; 3. Activity structure; 301, Support block; 3011, Guide groove; 3012, Adjustment groove; 302, Inner groove; 3021, Telescopic block. Detailed Implementation

[0029] To make the objectives, solutions, and advantages of the technical solutions of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments of the present invention.

[0030] Example: Please refer to Figures 1 to 10 As shown: This invention provides a bridge anchoring device, comprising: a connecting structure 1; the connecting structure 1 includes splicing plates 101 and slots 1011, two sets of splicing plates 101 are provided, and the serrated structures on the two sets of splicing plates 101 are interlocked, and a rectangular groove is provided at the bottom outer side of the splicing plate 101, a round rod is provided at the middle position of the rectangular groove, and circular through holes are provided at both ends of the splicing plate 101; the slots 1011 are provided at the lower end of the splicing plate 101, and the slots 1011 penetrate through both sides of the splicing plate 101; an anchoring structure 2 is provided on the connecting structure 1, and the anchoring plate 201 of the anchoring structure 2 is provided on the splicing plate 1. 01 The rectangular groove at the bottom of the outer side; the anchoring structure 2 is provided with a movable structure 3, the support block 301 of the movable structure 3 is slidably installed in the sliding groove 202 in the anchoring plate 201, and the guide groove 3011 on the outer side of the support block 301 is slidably connected to the locking block 2021 in the sliding groove 202, and the adjustment groove 3012 on the outer side of the support block 301 is slidably connected to the adjustment block 2031 in the anchoring plate 201; and a circular rod in the rectangular groove on the bottom side of the splicing plate 101 is vertically inserted into the support block 301, and the telescopic block 3021 in the support block 301 is inserted into the docking groove 103 in the splicing plate 101.

[0031] As a first embodiment of this application, such as Figure 4 and 10 As shown, the connecting structure 1 also includes: a buffer plate 102 and an insert 1021; the buffer plate 102 is located on the bottom side between the two sets of splicing plates 101, and the buffer plate 102 is made of rubber; there are two sets of inserts 1021, and the inserts 1021 are located on both sides of the buffer plate 102, and the inserts 1021 are inserted into the slots 1011 in the two sets of splicing plates 101; a mating groove 103 and a push plate 1031; the mating groove 103 is located inside the splicing plate 101, and a screw is rotatably installed in the middle of the mating groove 103; the push plate 1031 is slidably installed on the upper end of the mating groove 103, and the push plate 1031 is threadedly connected to the screw inside the push plate 1031.

[0032] A rectangular buffer plate 102 is provided to buffer the friction and impact between the two sets of splicing plates 101; an insert 1021 is provided, which can be inserted into the slot 1011 of the splicing plate 101 to fix the buffer plate 102 between the two sets of splicing plates 101; a rectangular docking groove 103 is provided, which can be engaged with the telescopic block 3021 on the support block 301 to fix the splicing plate 101 to the support block 301; a push plate 1031 is provided, which can be moved downward to push out the telescopic block 3021 inserted into the docking groove 103, thereby removing the telescopic block 3021 from limiting the splicing plate 101.

[0033] As a second embodiment of this application, it can be based on embodiment 1, such as... Figure 7-9 As shown, the anchoring structure 2 includes: an anchoring plate 201, an anchoring rod 2011, and a worm gear 2012; the anchoring plate 201 is a rectangular structure, and round holes are equidistantly opened at both ends of the anchoring plate 201; the anchoring rod 2011 is inserted into the round holes at both ends of the anchoring plate 201; there are two sets of worm gears 2012, and the worm gears 2012 are rotatably installed on the inner ends of both sides of the anchoring plate 201; a sliding groove 202 and a locking block 2021; the sliding groove 202 is opened in the middle position inside the anchoring plate 201; there are two sets of locking blocks 2021, and the locking blocks 2021 are symmetrically arranged on the upper ends of both sides of the sliding groove 202; a movable groove 203 and an adjusting block 2031; there are two sets of movable grooves 203. Furthermore, the movable grooves 203 are symmetrically opened on both inner ends of the anchor plate 201, and the movable grooves 203 are connected to the sliding grooves 202; the adjusting blocks 2031 are slidably installed in the movable grooves 203, and the wedge-shaped structure at the end of the adjusting blocks 2031 extends into the sliding grooves 202; there are control screws 204 and worm gears 2041; the control screws 204 are rotatably installed inside the anchor plate 201, and the reverse threads at both ends of the control screws 204 are threadedly connected to the two sets of adjusting blocks 2031 respectively; there are two sets of worm gears 2041, and the worm gears 2041 are fixedly installed on both sides of the control screws 204, and the worm gears 2041 are connected to the worm gears 2012 inside the anchor plate 201.

[0034] A rectangular anchor plate 201 is provided to fix the splicing plate 101 to the bridge body; an anchor rod 2011 is provided to fix the anchor plate 201 to the bridge body; a worm gear 2012 is provided to rotate the worm wheel 2041 and drive the control screw 204 to rotate; a rectangular slide groove 202 is provided to slide the support block 301 onto the anchor plate 201; and a triangular locking block 2021 is provided to control the movement of the support block 301 within the slide groove 202. It serves as a guide and limiter; a rectangular movable groove 203 is provided, through which the adjusting block 2031 can be slidably installed on both sides of the inside of the anchor plate 201; an L-shaped adjusting block 2031 is provided, by moving the adjusting block 2031, the adjusting block 2031 can support the support block 301 on the anchor plate 201; a control screw 204 is provided, by rotating the control screw 204, the two sets of adjusting blocks 2031 can be moved; a worm gear 2041 is provided, when the worm 2012 is rotated, the worm gear 2041 can drive the control screw 204 to rotate inside the anchor plate 201.

[0035] As a third embodiment of this application, based on embodiments 1 and 2, such as Figure 5-8 As shown, the movable structure 3 includes: a support block 301, a guide groove 3011, and an adjustment groove 3012; the support block 301 is a rectangular structure, and a vertical circular hole is opened in the middle of the interior of the support block 301; there are two sets of guide grooves 3011, which are symmetrically opened on both sides of the support block 301 and penetrate through the upper end of the support block 301; there are two sets of adjustment grooves 3012, which are symmetrically opened on both sides of the bottom of the support block 301; an inner groove 302 and a telescopic block 3021; ​​there are two sets of inner grooves 302, which are symmetrically opened inside the support block 301; the telescopic block 3021 is slidably installed in the inner groove 302 by an elastic element, and the end of the telescopic block 3021 extends out of the inner groove 302.

[0036] A rectangular support block 301 is provided to fix the splicing plate 101 to the anchor plate 201. A guide groove 3011 is provided, which allows the support block 301 to slide along the guide groove 3011 in the slide groove 202 by slidingly connecting the guide groove 3011 with the locking block 2021 in the slide groove 202. A wedge-shaped adjustment groove 3012 is provided, which allows the support block 301 to move up and down in the slide groove 202 when the adjustment block 2031 moves against the inner wall of the adjustment groove 3012. A rectangular inner groove 302 is provided, which allows the telescopic block 3021 to be slidably installed to both ends of the support block 301. A wedge-shaped telescopic block 3021 is provided, which allows the splicing plate 101 to be connected and fixed to the support block 301 by inserting the telescopic block 3021 into the slot 1011 of the splicing plate 101.

[0037] The specific usage and function of this embodiment are as follows: In this invention, such as Figure 1-10 As shown, two sets of anchor plates 201 are fixed to both sides of the expansion joint of the bridge body via anchor rods 2011. Then, the support block 301 is slidably installed into the groove 202 of the anchor plate 201, so that the adjustment groove 3012 on the bottom side of the support block 301 is slidably connected with the adjustment block 2031 extending from the movable groove 203. The splicing plate 101 is overlapped onto the support block 301 and the anchor plate 201, and the cylindrical rod inside the splicing plate 101 is inserted into the support block 301. Then, the expansion block 3021 extending from the support block 301 is engaged into the docking groove 103. The two sets of fixed splicing plates 101 are then inserted into the joint. After docking, install the buffer plate 102 between the two sets of splicing plates 101, and insert the insert strip 1021 on the buffer plate 102 into the slot 1011 of the splicing plate 101. At this time, observe whether the horizontal height of the two sets of splicing plates 101 is consistent. If there is a height difference, rotate the worm gear 2012 at the lower end of the splicing plate 101 on the lower side, thereby controlling the two sets of adjusting blocks 2031 to move towards the middle at the same time, and supporting the support block 301 and the splicing plate 101 until the horizontal height of the two sets of splicing plates 101 is adjusted to the same height. This completes the anchoring of the expansion joint on the bridge body.

Claims

1. A bridge anchoring device, comprising: Connection structure (1); The connection structure (1) includes a splicing plate (101) and a slot (1011). The splicing plate (101) is provided in two sets, and the serrated structures on the two sets of splicing plates (101) are interlocked. A rectangular groove is provided at the bottom outer side of the splicing plate (101), and a round rod is provided in the middle of the rectangular groove. Circular through holes are provided at both ends of the splicing plate (101). The slot (1011) is provided at the lower end of the splicing plate (101), and the slot (1011) passes through both sides of the splicing plate (101). The connection structure (1) is characterized by having an anchoring structure (2), and the anchoring plate (201) of the anchoring structure (2) is provided at the bottom outer side of the splicing plate (101). The rectangular groove; the anchoring structure (2) is provided with a movable structure (3), the support block (301) of the movable structure (3) is slidably installed in the sliding groove (202) in the anchoring plate (201), and the guide groove (3011) on the outside of the support block (301) is slidably connected to the locking block (2021) in the sliding groove (202), and the adjustment groove (3012) on the outside of the support block (301) is slidably connected to the adjustment block (2031) in the anchoring plate (201); and a circular rod in the rectangular groove on the bottom side of the splicing plate (101) is vertically inserted into the support block (301), and the telescopic block (3021) in the support block (301) is inserted into the docking groove (103) in the splicing plate (101).

2. The bridge anchoring device according to claim 1, characterized in that: The connection structure (1) further includes: a buffer plate (102) and a strip (1021); the buffer plate (102) is located on the bottom side between the two sets of splicing plates (101), and the buffer plate (102) is made of rubber; there are two sets of strips (1021), and the strips (1021) are located on both sides of the buffer plate (102), and the strips (1021) are inserted into the slots (1011) in the two sets of splicing plates (101).

3. A bridge anchoring device according to claim 1, characterized in that: The connection structure (1) includes: a docking groove (103) and a push plate (1031); the docking groove (103) is located inside the splicing plate (101), and a screw is rotatably installed in the middle of the docking groove (103); the push plate (1031) is slidably installed on the upper end of the docking groove (103), and the push plate (1031) is threadedly connected to the screw inside the push plate (1031).

4. A bridge anchoring device according to claim 1, characterized in that: The anchoring structure (2) includes: an anchoring plate (201), an anchoring rod (2011), and a worm gear (2012); the anchoring plate (201) is a rectangular structure, and round holes are equally spaced at both ends of the anchoring plate (201); the anchoring rod (2011) is inserted into the round holes at both ends of the anchoring plate (201); there are two sets of worm gears (2012), and the worm gears (2012) are rotatably installed on the inner ends of both sides of the anchoring plate (201).

5. A bridge anchoring device according to claim 4, characterized in that: The anchoring structure (2) includes: a sliding groove (202) and a locking block (2021); the sliding groove (202) is located in the middle of the anchoring plate (201); there are two sets of locking blocks (2021), and the locking blocks (2021) are symmetrically arranged on the upper ends of both sides of the sliding groove (202).

6. A bridge anchoring device according to claim 4, characterized in that: The anchoring structure (2) includes: a movable groove (203) and an adjusting block (2031); there are two sets of movable grooves (203), and the movable grooves (203) are symmetrically opened on both sides of the inner end of the anchoring plate (201), and the movable grooves (203) are connected to the sliding groove (202); the adjusting block (2031) is slidably installed in the movable groove (203), and the wedge-shaped structure at the end of the adjusting block (2031) extends into the sliding groove (202).

7. A bridge anchoring device according to claim 6, characterized in that: The anchoring structure (2) includes a control screw (204) and a worm gear (2041); the control screw (204) is rotatably installed inside the anchoring plate (201), and the reverse threads at both ends of the control screw (204) are threadedly connected to two sets of adjusting blocks (2031); there are two sets of worm gears (2041), and the worm gears (2041) are fixedly installed on both sides of the control screw (204), and the worm gears (2041) are connected to the worm (2012) inside the anchoring plate (201) for transmission.

8. A bridge anchoring device according to claim 1, characterized in that: The movable structure (3) includes: a support block (301), a guide groove (3011), and an adjustment groove (3012); the support block (301) is a rectangular structure, and a vertical circular hole is provided in the middle of the support block (301); there are two sets of guide grooves (3011), and the guide grooves (3011) are symmetrically opened on both sides of the support block (301), and the guide grooves (3011) penetrate through the upper end of the support block (301); there are two sets of adjustment grooves (3012), and the adjustment grooves (3012) are symmetrically opened on both sides of the bottom of the support block (301).

9. A bridge anchoring device according to claim 8, characterized in that: The movable structure (3) includes: an inner groove (302) and a telescopic block (3021); the inner groove (302) is provided in two sets, and the inner groove (302) is symmetrically opened inside the support block (301); the telescopic block (3021) is slidably installed in the inner groove (302) through an elastic element, and the end of the telescopic block (3021) extends out from the inner groove (302).

Citation Information

Patent Citations

  • Bridge modular pattern telescopic device anchoring method and structure

    CN104452580A