Direct insertion box segment connection structure and bridge pier anti-collision facility adopting same

Abstract

The utility model discloses a straight insertion type box body section connecting structure and the bridge pier anti -collision facility of adopting it, wherein the connecting structure includes first connecting corbel, second connecting corbel, guide connecting screw rod and upper fastening device and lower fastening device, and first connecting corbel and second connecting corbel are arranged on the connecting side of corresponding box body section in the adjacent two box body sections, and the guide connecting screw rod is arranged in the first connecting corbel and the second connecting corbel and is penetrated from top to bottom, and the upper fastening device and the lower fastening device are matched to lock and fix the guide connecting screw rod and the first connecting corbel and the second connecting corbel. Corbel main part adopts the design of tooth key structure to realize the shear resistance and positioning function preliminarily, and a bidirectional cooperation fastening self -locking structure is formed by the cooperation of the guide screw rod of multiple groups and the fastening device of upper and lower two ends, thereby realizing the close cooperation connection between the box body sections. The utility model does not need accurate machining positioning hole, and it is not troublesome to work underwater.

Description

Technical Field

[0001] This utility model relates to the technical field of bridge auxiliary equipment, specifically to a direct-insertion box segment connection structure and a bridge pier anti-collision facility using the same. Background Technology

[0002] Currently, the main connection methods for anti-collision facilities are movable bracket connections and steel flange connections. The conventional movable bracket connection method (flexible connection) is a clearance fit, which has poor connection stability and difficulty in underwater installation. Flange connections also have the problem of high assembly and installation precision. Due to the limitations of the manufacturing process, the contact surface is often deformed, making it difficult to waterproof and seal, and failing to achieve the expected effect. Summary of the Invention

[0003] The purpose of this utility model is to provide a direct-insertion box segment connection structure to solve the problem that the connection of existing bridge pier anti-collision box segments requires manual underwater installation, which involves high risk and high installation cost.

[0004] To achieve the above objectives, this utility model provides a direct-insertion box-type segment connection structure for connecting several box-type segments in bridge pier anti-collision facilities. The connection structure includes:

[0005] At least one first connecting bracket is disposed on the connecting side of one of two adjacent box segments;

[0006] At least one second connecting bracket is disposed on the connecting side of another box segment in two adjacent box segments; the at least one second connecting bracket is configured to cooperate with the at least one first connecting bracket;

[0007] At least one guide connecting screw is provided, which extends vertically through the at least one first connecting bracket and the at least one second connecting bracket, so as to fix the first connecting bracket and the second connecting bracket together.

[0008] At least one upper fastening device, the number of which is adapted to the number of the guide connecting screws, and one upper fastening device is fitted onto the upper end of each guide connecting screw;

[0009] At least one lower fastening device is provided, the number of which is adapted to the number of the guide connecting screws, and each guide connecting screw is fitted with a lower fastening device at its lower end; the upper fastening device and the lower fastening device located on the same guide connecting screw cooperate to lock and fix the guide connecting screw to the first connecting bracket and the second connecting bracket.

[0010] Furthermore, there are two first connecting brackets and two second connecting brackets. The two first connecting brackets are respectively located at the upper and lower ends of the connecting side of one box segment, and the two second connecting brackets are respectively located at the upper and lower ends of the connecting side of another box segment. The contact surfaces of the two first connecting brackets and the two second connecting brackets are all configured with a toothed key structure, and the two first connecting brackets are respectively connected to the two second connecting brackets by engaging the toothed key.

[0011] Furthermore, the first connecting bracket is provided with a plurality of first connecting holes, and the second connecting bracket is provided with a plurality of second connecting holes corresponding to the plurality of first connecting holes; the number of the guide connecting screws matches the number of the first connecting holes and the number of the second connecting holes, and the plurality of guide connecting screws are provided to pass through the corresponding first connecting holes and the second connecting holes.

[0012] Furthermore, the upper fastening device includes an upper conical cylinder and an upper conical sleeve, an upper pad, an upper limiting plate, and an upper nut. The lower part of the upper conical cylinder is inserted into the first connecting hole. The upper conical cylinder is provided with an upper conical hole that is larger at the top and smaller at the bottom. The upper conical sleeve is disposed in the upper conical hole and is sleeved on the guide connecting screw. The upper limiting plate, the upper pad, and the upper nut are arranged sequentially from bottom to top above the upper conical cylinder.

[0013] Furthermore, the lower fastening device includes a lower cone cylinder, a lower cone sleeve, a lower limiting plate, a lower pad, a lower nut, and a bottom accessory mounting box. The upper part of the lower cone cylinder is inserted into the second connecting hole. The lower cone cylinder has a lower conical hole that is smaller at the top and larger at the bottom. The lower cone sleeve is disposed in the lower conical hole and is sleeved on the guide connecting screw. The bottom accessory mounting box is disposed below the lower cone cylinder. The lower limiting plate, the lower pad, and the lower nut are arranged sequentially from top to bottom in the bottom accessory mounting box.

[0014] Furthermore, the lower end of the guide connecting screw is provided with a first tapered guide portion; the guide connecting screw is also provided with a sleeve for being placed in the first connecting hole and the second connecting hole.

[0015] This utility model also provides another type of direct-insertion box segment connection structure for connecting several box segments in bridge pier anti-collision facilities. The connection structure includes multiple connecting lugs on the connecting sides of two adjacent box segments. The connecting lugs on the two box segments are connected one-to-one by connecting pins. One side of the connecting pin is provided with a wedge lifting screw parallel to its axis. The upper end of the wedge lifting screw is provided with a movable wedge lifting turntable, and the lower end of the wedge lifting screw is provided with a movable wedge. The movable wedge is set on a movable wedge guide rail and can slide up and down along the movable wedge guide rail under the drive of the wedge lifting screw. One side of the movable wedge guide rail is also provided with a fixed wedge for locking with the movable wedge.

[0016] Furthermore, a pin cap is provided at the upper end of the connecting pin, and a second tapered guide is provided at the lower end of the connecting pin.

[0017] Furthermore, the top of the connecting pin is provided with a connecting pin stop cover plate to prevent the pin from moving upwards and falling off.

[0018] This utility model also provides a bridge pier anti-collision facility, including several box segments and one of the above two connection structures. The several box segments are enclosed by the connection structure to form a protective assembly and are installed around the bridge pier. Each box segment includes a UHPC box, and the UHPC box is equipped with an energy dissipation device. Each box segment is equipped with a damping device between itself and the bridge pier. The protective assembly is equipped with a cable bollard and a ladder is installed outside the protective assembly.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) This utility model provides a direct-insertion box segment connection structure, including a first connecting bracket, a second connecting bracket, a guide connecting screw, an upper fastening device, and a lower fastening device. The guide connecting screw passes through the first and second connecting brackets vertically to fix the first and second connecting brackets together. The bracket body adopts a toothed key structure design to initially achieve shear resistance and positioning functions. Multiple sets of continuous guide screws cooperate with the fastening devices at the upper and lower ends to form a two-way cooperating fastening self-locking structure (the cones at the upper and lower ends form a reverse self-locking), thereby achieving a tight fit connection between the box segments. Compared with the existing anti-collision facilities using steel flange connections, the connection structure of this utility model does not require precise machining of positioning holes and avoids the trouble of underwater construction operations. When the cones and cones in the fastening devices with reverse designs at both ends of the guide connecting screw move relative to each other, a reaction force is generated to prevent the guide connecting screw from coming out, protecting the facility from failure.

[0021] (2) The present invention provides a direct-insertion box segment connection structure, which adopts a continuous connecting pin shaft. The upper end of the pin shaft is designed with an anti-detachment device to ensure that the pin shaft never comes out. During the service life of the pin shaft, the anti-collision safety of the bridge pier is guaranteed and the anti-collision facilities are not prone to failure.

[0022] (3) In this utility model, a direct-insertion box segment connection structure is provided. Two opposing wedges between the box segment connection surfaces are tightened by screws to make them slide and resist pressure, so that the box segments maintain a rigid connection and the connecting pins will not be damaged by fatigue wear due to loosening.

[0023] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0025] Figure 1 This is a schematic diagram of one embodiment of the direct-insertion box segment connection structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the guide connecting screw and the fastening device in this utility model;

[0027] Figure 3 for Figure 2 Exploded view of the structure of the guide connecting screw and the fastening device;

[0028] Figure 4 This is a schematic diagram of another embodiment of the direct-insertion box segment connection structure of this utility model;

[0029] Figure 5 This is a structural schematic diagram of a bridge pier anti-collision facility using a direct-insertion box segment connection structure according to the present invention;

[0030] The components include: 1. Box girder segment; 2. Pier; 3. Energy dissipation device; 4. Connecting structure; 5. Damping device; 6. Cable bollard; 7. Ladder; 1.1 High-performance panel; 4.1 First connecting bracket; 4.2 Second connecting bracket; 4.3 Guide connecting screw; 4.4 Upper fastening device; 4.5 Lower fastening device; 4.6 Sleeve; 4.7 Connecting ear plate; 4.8 Connecting pin; 4.9 Inclined block lifting screw; 4.10 Movable inclined block lifting turntable. 4.11 Movable inclined block; 4.12 Movable inclined block guide rail; 4.13 Fixed inclined block; 4.14 Pin stop end cover plate; 4.4a Upper cone cylinder; 4.4b Upper cone sleeve; 4.4c Upper limit plate; 4.4d Upper pad; 4.4e Upper nut; 4.5a Lower cone cylinder; 4.5b Lower cone sleeve; 4.5c Lower limit plate; 4.5d Lower pad; 4.5e Lower nut; 4.5f Bottom accessory mounting box. Detailed Implementation

[0031] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model. Example

[0032] Please see Figures 1 to 3 This embodiment provides a direct-insertion box-type segment connection structure for connecting several box-type segments 1 in bridge pier anti-collision facilities. The connection structure 4 includes a first connecting bracket 4.1, a second connecting bracket 4.2, a guide connecting screw 4.3, an upper fastening device 4.4, and a lower fastening device 4.5. Both the first and second connecting brackets adopt a toothed key structure design to initially achieve shear resistance and positioning functions. Simultaneously, multiple sets of guide screws, in conjunction with the fastening devices at the upper and lower ends, form a bidirectional fastening self-locking structure (the cones at the upper and lower ends form reverse self-locking with the cone sleeves), thereby achieving a tight fit connection between adjacent box-type segments. The specific structure is as follows:

[0033] The first connecting brackets 4.1 are two fixedly installed at the upper and lower ends of the connecting side of one of the two adjacent box segments 1; correspondingly, the second connecting brackets 4.2 are also two installed at the upper and lower ends of the connecting side of the other of the two adjacent box segments 1; and the two first connecting brackets 4.1 are respectively matched with the two second connecting brackets 4.2. Specifically, the contact surfaces of the two first connecting brackets 4.1 and the two second connecting brackets 4.2 are all set with a toothed key structure, and the two first connecting brackets 4.1 are respectively matched with the two second connecting brackets 4.2 with the toothed key to achieve initial positioning when the box segments are docked. The first connecting brackets 4.1 are provided with multiple first connecting holes, and the second connecting brackets 4.2 are provided with multiple second connecting holes corresponding to the multiple first connecting holes. The number of guide connecting screws 4.3 matches the number of first connecting holes and second connecting holes, and the multiple guide connecting screws 4.3 are arranged through the corresponding first connecting holes and second connecting holes. The lower end of the guide connecting screws 4.3 is provided with a first tapered guide part. The guide connecting screw 4.3 is inserted into the pre-embedded tapered cylinder / sleeve connection hole for precise positioning; the tapered guide design of the guide connecting screw makes installation simpler and more convenient.

[0034] Each guide connecting screw 4.3 has an upper fastening device 4.4 and a lower fastening device 4.5 at its upper and lower ends, respectively. The upper fastening device 4.4 includes an upper cone cylinder 4.4a, an upper cone sleeve 4.4b, an upper pad 4.4c, an upper limiting plate 4.4d, and an upper nut 4.4e. The lower part of the upper cone cylinder 4.4a is inserted into the first connecting hole. The upper cone cylinder 4.4a has an upper cone-shaped hole that is larger at the top and smaller at the bottom. The upper cone sleeve 4.4b is placed in the upper cone-shaped hole and is fitted onto the guide connecting screw 4.3. The upper limiting plate 4.4d, the upper pad 4.4c, and the upper nut 4.4e are arranged sequentially from bottom to top above the upper cone cylinder 4.4a. The lower fastening device 4.5 includes a lower cone cylinder 4.5a, a lower cone sleeve 4.5b, a lower limiting plate 4.5c, a lower pad 4.5d, a lower nut 4.5e, and a bottom accessory mounting box 4.5f. The upper part of the lower cone cylinder 4.5a is inserted into the second connecting hole. The lower cone cylinder 4.5a has a lower cone-shaped hole that is smaller at the top and larger at the bottom. The lower cone sleeve 4.5b is placed in the lower cone-shaped hole and is fitted onto the guide connecting screw 4.3. The bottom accessory mounting box 4.5f is located below the lower cone cylinder 4.5a. The lower limiting plate 4.5c, the lower pad 4.5d, and the lower nut 4.5e are arranged sequentially from top to bottom in the bottom accessory mounting box 4.5f. When the guide connecting screw 4.3 moves upward, it causes the lower tapered sleeve 4.5b in the connecting hole to move upward. The lower tapered sleeve 4.5b is then subjected to a reverse constraint force from the lower tapered cylinder 4.5a, thus preventing the guide connecting screw 4.3 and the lower tapered sleeve 4.5b from moving upward. Conversely, when the guide connecting screw 4.3 moves downward, it causes the upper tapered sleeve 4.4b in the connecting hole to move downward. The upper tapered sleeve 4.4b is then subjected to a reverse constraint force from the upper tapered cylinder 4.4a, thus preventing the guide connecting screw 4.3 and the upper tapered sleeve 4.4b from moving downward. In this structural design, the two tapered sleeves in opposite directions mutually constrain the shaft and the tapered cylinder, ensuring a stable and effective connection, thereby achieving a rigid connection that is resistant to impact and will not suffer fatigue wear damage due to wave forces.

[0035] In this embodiment, the connection structure between the box segments uses a guide connecting screw 4.3 with a tapered guide at the lower end, which is inserted into the corresponding connecting hole for locking. For example... Figure 1 As shown, wear-resistant upper cone 4.4a, lower cone 4.5a, and sleeve 4.6 are pre-embedded in the connecting hole. After the guide connecting screw 4.3 is inserted into the connecting hole, it is tightened with accessories such as the lower nut 4.5e of the bottom accessory mounting box 4.5f and then lifted to the installation position. Then, the upper cone sleeve 4.4b at the other end is placed into the second connecting hole with the upper cone 4.4a. After the upper pad 4.4d is put on and the upper nut 4.4e is tightened, the upper limiting plate 4.4c for anti-loosening is then put in, thus completing the locking connection action of the guide connecting screw 4.3.

[0036] When manufacturing the box-type segments in this embodiment, the sleeves and cones are pre-fixed in the designed positions (corresponding connection holes) for pre-embedding. After the individual box-type segments are manufactured, they are shipped to the vicinity of the installation site's water area. The specific implementation method is as follows:

[0037] First, place the lower nut 4.5e, lower limiting plate 4.5c, lower pad 4.5d, and lower cone sleeve 4.5b, etc., for the lower end (bottom) of the connecting structure of box segment 1 into the bottom accessory mounting box 4.5f in sequence; then lift box segment 1 and fix the bottom accessory mounting box 4.5f below the lower bracket connecting hole of box segment 1; lift box segment 1 to the installation water area and adjust its position using a crane; then lift another box segment 1 to be connected to the installation water area to achieve the upper and lower overlap (tooth key connection) of the first connecting bracket 4.1 and the second connecting bracket 4.2 at the connection point; fine-tune the positions of these two box segments and guide the connecting screw 4. 3. Insert the connecting hole and tighten the lower nut 4.5e in the bottom accessory mounting box 4.5f into place; insert the upper pad 4.4c and upper nut 4.4e into the upper end of the guide connecting screw 4.3, and tighten the upper nut 4.4e (there should be no visible gap between the first and second connecting brackets), so that the lower cone sleeve 4.5b is lifted into place; loosen the upper nut 4.4e and insert the upper cone sleeve 4.4b; retighten the upper nut 4.4e, using a torque wrench to determine the tightening torque, place the upper limiting plate 4.4d, and fix the upper limiting plate 4.4d, upper pad 4.4c, and upper cone sleeve 4.4b. Finally, install the remaining connecting screws of this connection part in the same way. The pre-installed bottom accessory mounting box design before underwater installation can effectively solve the problem of underwater fastening installation.

[0038] Similarly, the connection method of the remaining box sections 1 is the same as the placement described above. After each node is installed, the protective facilities are enclosed. The installation is complete, and no underwater operation is required. Example

[0039] Please see Figure 4This embodiment also provides another type of direct-insertion box segment connection structure for connecting several box segments 1 in the bridge pier anti-collision facility; the connection structure adopts the "ear plate-pin-lifting turntable" structure for connection to solve the problem of difficult underwater construction operations. The connection structure 4 includes multiple connecting lugs 4.7 disposed on the connecting sides of two adjacent housing segments 1. The connecting lugs 4.7 on the two housing segments 1 are connected one-to-one by connecting pins 4.8. One side of the connecting pins 4.8 is provided with a wedge lifting screw 4.9 parallel to its axis. The upper end of the wedge lifting screw 4.9 is provided with a movable wedge lifting turntable 4.10, and the lower end of the wedge lifting screw 4.9 is provided with a movable wedge 4.11. The movable wedge 4.11 is disposed on a movable wedge guide rail 4.12 and can slide up and down along the movable wedge guide rail 4.12 under the drive of the wedge lifting screw 4.9. One side of the movable wedge guide rail 4.12 is also provided with a fixed wedge 4.13 for locking with the movable wedge 4.11. The upper end of the connecting pin 4.8 is equipped with a pin cap, and the lower end of the connecting pin 4.8 is equipped with a second tapered guide. The top of the connecting pin 4.8 is equipped with a connecting pin stop cover plate 4.14 to prevent the pin from moving upwards and falling off. The connection between two adjacent housing segments 1 uses a tapered pin inserted into an ear plate, and a reverse wedge is added to the mating surface of the housing segments. A screw mechanism is used for tightening and locking, completing a simple, quick, rigid, and reliable connection of the housing. The tapered guide design of the pin makes installation simpler and more convenient; the anti-detachment design at the upper end of the pin and the opposing wedge locking design on the connecting surface of the housing segments make the housing connection more stable and reliable.

[0040] When manufacturing the box segment of this embodiment, the fixed inclined block 4.13, the movable inclined block guide rail 4.12, and the connecting ear plate 4.7 are pre-embedded and fixed according to the design requirements. After the individual box segment 1 is manufactured, it is shipped to the vicinity of the installation site water area. The specific implementation method is as follows:

[0041] Hoist the tank section 1 to the installation area. Adjust the two tank sections to be connected so that the connecting lugs on both sides are initially aligned. After the movable inclined block lifting mechanism (lifting screw 4.9 and movable inclined block 4.11) is in place, insert the lug connecting pin 4.8 for connection. Rotate the movable inclined block lifting turntable 4.10 to lift the movable inclined block 4.11 upwards along the movable inclined block guide rail 4.12, tightly against the fixed inclined block 41, and lock it in place. After the two tank sections are precisely fixed, install the lug connecting pin stop cover 4.14 above the lug connecting pin 4.8 to prevent the pin from moving upwards and falling off. The installation is now complete. The connection method for other tank sections is similar. Example

[0042] Please see Figure 5This invention also provides a bridge pier anti-collision facility, comprising several box segments 1 and the connecting structure 4 described in Embodiment 1 or Embodiment 2 above. The several box segments 1 are enclosed by the connecting structure 4 to form a protective assembly, which is installed around the bridge pier 2. The box segment 1 includes a UHPC box, which has a high-performance panel 1.1. An energy dissipation device 3 is provided inside the UHPC box. A damping device 5 is provided between each box segment 1 and the bridge pier 2. A bollard 6 is installed inside the protective assembly (only one bollard 6 is installed in a complete set of enclosed anti-collision facilities), and a ladder 7 is provided outside the protective assembly. This connecting structure allows the bridge pier anti-collision box segments in water to be securely connected by a top-insertion method with the assistance of a certain locking mechanism, eliminating the need for underwater installation, simplifying and facilitating maintenance, and reducing installation and maintenance costs.

[0043] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A direct-insertion box-type segment connection structure for connecting several box segments (1) in a bridge pier anti-collision facility, characterized in that, The connection structure (4) includes: At least one first connecting bracket (4.1) is provided on the connecting side of one of the two adjacent box segments (1); At least one second connecting bracket (4.2) is disposed on the connecting side of another box segment (1) in two adjacent box segments (1); the at least one second connecting bracket (4.2) is configured to cooperate with the at least one first connecting bracket (4.1); At least one guide connecting screw (4.3) is provided to pass through the at least one first connecting bracket (4.1) and the at least one second connecting bracket (4.2) vertically to fix the first connecting bracket (4.1) and the second connecting bracket (4.2) together. At least one upper fastening device (4.4), the number of which is adapted to the number of the guide connecting screws (4.3), and each guide connecting screw (4.3) has an upper fastening device (4.4) fitted onto its upper end; At least one lower fastening device (4.5) is provided, the number of which is adapted to the number of the guide connecting screws (4.3), and a lower fastening device (4.5) is fitted onto the lower end of each guide connecting screw (4.3); the upper fastening device (4.4) and the lower fastening device (4.5) located on the same guide connecting screw (4.3) cooperate to lock and fix the guide connecting screw (4.3) to the first connecting bracket (4.1) and the second connecting bracket (4.2).

2. The direct-insertion box segment connection structure according to claim 1, characterized in that, There are two first connecting brackets (4.1) and two second connecting brackets (4.2). The two first connecting brackets (4.1) are respectively located at the upper and lower ends of the connecting side of one box segment (1), and the two second connecting brackets (4.2) are respectively located at the upper and lower ends of the connecting side of another box segment (1). The contact surfaces of the two first connecting brackets (4.1) and the two second connecting brackets (4.2) are all configured with a toothed key structure. The two first connecting brackets (4.1) are respectively connected to the two second connecting brackets (4.2) with the toothed key.

3. The direct-insertion box segment connection structure according to claim 1, characterized in that, The first connecting bracket (4.1) is provided with a plurality of first connecting holes, and the second connecting bracket (4.2) is provided with a plurality of second connecting holes corresponding to the plurality of first connecting holes; the number of the guide connecting screws (4.3) matches the number of the first connecting holes and the number of the second connecting holes, and the plurality of guide connecting screws (4.3) are provided to pass through the corresponding first connecting holes and the second connecting holes.

4. The direct-insertion box segment connection structure according to claim 3, characterized in that, The upper fastening device (4.4) includes an upper conical cylinder (4.4a), an upper conical sleeve (4.4b), an upper pad (4.4c), an upper limiting plate (4.4d), and an upper nut (4.4e). The lower part of the upper conical cylinder (4.4a) is inserted into the first connecting hole. The upper conical cylinder (4.4a) is provided with an upper conical hole that is larger at the top and smaller at the bottom. The upper conical sleeve (4.4b) is disposed in the upper conical hole and is sleeved on the guide connecting screw (4.3). The upper limiting plate (4.4d), the upper pad (4.4c), and the upper nut (4.4e) are arranged sequentially from bottom to top above the upper conical cylinder (4.4a).

5. The direct-insertion box segment connection structure according to claim 3, characterized in that, The lower fastening device (4.5) includes a lower cone (4.5a), a lower cone sleeve (4.5b), a lower limiting plate (4.5c), a lower pad (4.5d), a lower nut (4.5e), and a bottom accessory mounting box (4.5f). The upper part of the lower cone (4.5a) is inserted into the second connecting hole. The lower cone (4.5a) has a lower conical hole that is smaller at the top and larger at the bottom. The lower cone sleeve (4.5b) is disposed in the lower conical hole and is sleeved on the guide connecting screw (4.3). The bottom accessory mounting box (4.5f) is disposed below the lower cone (4.5a). The lower limiting plate (4.5c), the lower pad (4.5d), and the lower nut (4.5e) are arranged sequentially from top to bottom in the bottom accessory mounting box (4.5f).

6. The direct-insertion box segment connection structure according to claim 3, characterized in that, The lower end of the guide connecting screw (4.3) is provided with a first tapered guide portion; the guide connecting screw (4.3) is also provided with a sleeve (4.6) for placement in the first connecting hole and the second connecting hole.

7. A bridge pier anti-collision device, characterized in that, The system includes several box segments (1) and a direct-insertion box segment connection structure as described in any one of claims 1-6. The several box segments (1) are connected by a connection structure (4) to form a protective assembly around the pier (2). Each box segment (1) includes a UHPC box. The UHPC box is equipped with several energy dissipation devices (3). Each box segment (1) is also equipped with a damping device (5) between it and the pier (2). The protective assembly is also equipped with a cable bollard (6). The protective assembly is equipped with a ladder (7).

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