A bolted connection structure for precast concrete bridge deck and its construction method

Abstract

The present invention discloses a bolted connection structure for precast concrete bridge decks and its construction method, belonging to the technical field of bridge construction. The connection structure includes two adjacent precast concrete bridge decks that are butted against each other. At the end of the bridge deck, annular vertical steel bars arranged along the length direction of the bridge deck and transverse steel bars arranged along the width direction of the bridge deck are tied. At the two ends of the bridge decks, a number of first vertical steel plates and second vertical steel plates that are paired with each other are respectively embedded at intervals. The first vertical steel plate and the second vertical steel plate are respectively located between adjacent annular vertical steel bars and are provided with a number of the transverse steel bars. And at the top, a first transverse steel plate and a second transverse steel plate with vertical studs at the bottom are respectively connected. The first transverse steel plate is tightly lapped on the second transverse steel plate and is detachably and tightly connected at the bottom. The connection structure and its construction method provided by the present invention improve the construction efficiency of bridge assembly and the overall performance of the connection of the bridge deck.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge deck construction, and particularly relates to a bolted connection structure for precast concrete bridge decks and a construction method thereof. Background Art

[0002] The connection method of the bridge deck of a precast and assembled composite beam bridge is the key to improving the assembly efficiency. At present, the connection form of the precast bridge deck is mainly the lapped reinforcement cast-in-place wet joint. The shrinkage and creep of the cast-in-place wet joint concrete are likely to cause cracks in the deck. Due to construction errors, the longitudinal reinforcement is likely to be bent, resulting in difficulty in lapping. The low bond strength at the new and old concrete connection interface is likely to crack, which becomes a design difficulty. Moreover, the construction of the wet joint of the precast bridge deck is difficult, the construction period is long, and it is seriously affected by the environment. The dry-type precast bridge deck steel-concrete connector can avoid the shrinkage and creep of the cast-in-place concrete and the cracking surface of the new and old concrete, ensure the bearing capacity of the assembled structure, make full use of the material properties of steel and concrete, and the use of prestressed tendons and epoxy resin in the negative moment section can effectively improve the crack resistance of the bridge deck. Summary of the Invention

[0003] The purpose of the invention is to overcome the deficiencies in the prior art and provide a bolted connection structure for precast concrete bridge decks and a construction method thereof, which reduce the on-site wet operation and welding defects, and improve the bridge assembly construction efficiency and the overall performance of the bridge deck connection.

[0004] To achieve the above purpose, the invention is implemented by the following technical solutions:

[0005] In the first aspect, the invention provides a bolted connection structure for precast concrete bridge decks, including two adjacent precast concrete bridge decks butt-jointed. Circular vertical steel bars arranged along the length direction of the bridge deck and transverse steel bars arranged along the width direction of the bridge deck are tied at the ends of the bridge decks. A plurality of first vertical steel plates and second vertical steel plates configured in pairs with each other are respectively embedded at intervals along the width direction of the two ends of the bridge decks.

[0006] The first vertical steel plate and the second vertical steel plate are respectively located between adjacent circular vertical steel bars and are provided with a plurality of the transverse steel bars passing through them. First transverse steel plates and second transverse steel plates arranged longitudinally along the width direction of the bridge deck are respectively fixed at the tops of the first vertical steel plate and the second vertical steel plate. An extension part extending outward and detachably fastened to the second transverse steel plate is arranged on the first transverse steel plate. The bottoms of the first vertical steel plate and the second vertical steel plate are detachably fastened and connected. First vertical stud bolts and second vertical stud bolts extending downward and embedded between the circular vertical steel bars and the transverse steel bars are respectively arranged at the bottoms of the first transverse steel plate and the second transverse steel plate.

[0007] Further, the first vertical stud and the second vertical stud are uniformly arranged in an array along the length direction and width direction of the bridge deck respectively within the grid formed by adjacent transverse steel bars and adjacent circular vertical steel bars.

[0008] Further, one end of the second vertical stud is a threaded end with external threads, and a number of bolt holes for mating use are respectively formed on the second transverse steel plate and the extension part of the first transverse steel plate. The threaded end of the second vertical stud passes through the bolt holes on the second transverse steel plate and the extension part of the first transverse steel plate and is tightened and fixed by nuts on both sides of the bolt holes.

[0009] Further, the first vertical steel plate and the second vertical steel plate are of an inverted right trapezoid structure. Three through holes for passing the transverse steel bars are uniformly spaced along the length direction of the bridge deck at the upper part of the first vertical steel plate and the second vertical steel plate, and two through holes for passing the transverse steel bars are arranged horizontally along the length direction at the lower part of the first vertical steel plate and the second vertical steel plate. The three upper through holes and the two lower through holes are integrally in an inverted right trapezoid shape.

[0010] Further, a circular installation hole is formed at the bottom of the first vertical steel plate and the second vertical steel plate. The two installation holes are tightly connected by a steel plate connector with bolts passing through the installation holes at both ends.

[0011] Further, both sides of the top surface of the first transverse steel plate are flush with the top surfaces of the two bridge deck panels respectively.

[0012] Further, epoxy resin glue is coated on the vertical side surfaces between the first vertical steel plate and the second vertical steel plate.

[0013] Further, a tension prestressing tendon passing through the two bridge deck panels along the length direction of the bridge deck is arranged between the adjacent first vertical steel plate and the second vertical steel plate.

[0014] Further, three rows of the first vertical studs and the second vertical studs are respectively arranged at intervals along the length direction of the bridge deck at the bottoms of the first transverse steel plate and the second transverse steel plate.

[0015] In a second aspect, the present invention provides a construction method for the bolt connection structure of the precast concrete bridge deck panel described in the first aspect, including the following steps:

[0016] A number of first vertical steel plates are welded and fixed at one side of the bottom of the first transverse steel plate at uniform intervals along the width direction of the bridge deck. Three first vertical studs are welded and fixed at uniform intervals along the width direction between adjacent first vertical steel plates, and one end of a precast concrete bridge deck panel is embedded to configure:

[0017] The first vertical steel plate is located between the annular vertical steel bars tied at the ends of adjacent bridge decks, the transverse steel bars tied at the ends of the bridge deck penetrate through the through holes of the first vertical steel plate, and the first vertical studs are inserted between adjacent transverse steel bars along the length direction of the bridge deck;

[0018] A plurality of second vertical steel plates are welded and fixed at equal intervals along the width direction of the bridge deck to the bottom of the second transverse steel plate and embedded into the end of another precast concrete bridge deck, configured as:

[0019] The first vertical steel plate is located between the annular vertical steel bars tied at the ends of adjacent bridge decks, and the transverse steel bars tied at the ends of the bridge deck penetrate through the through holes of the first vertical steel plate;

[0020] First, hoist and position the bridge deck embedded with the second vertical steel plate on site, and then hoist the bridge deck embedded with the first vertical steel plate so that the first vertical steel plate and the second vertical steel plate are butted in pairs and epoxy resin glue is applied to the vertical end faces, and the extension part of the first transverse steel plate overlaps on the second vertical steel plate and the bolt holes of the extension part are aligned with the bolt holes of the second vertical steel plate. The threaded ends of the second vertical studs sequentially pass through the bolt holes of the second transverse steel plate and the extension part and are tightened and fixed by nuts on both sides of the bolt holes;

[0021] Install the bolts at both ends of the steel plate connector into the installation holes of each pair of configured first vertical steel plates and second vertical steel plates and tighten and fix them;

[0022] Pass prestressing tendons through the bellows reserved along the length direction of the two precast concrete bridge decks and tension the prestress to the designed control stress value of the bridge deck.

[0023] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0024] The bolted structure of the precast concrete bridge deck of the present invention uses vertically embedded steel plates, transverse steel plates, and vertical studs for detachable fastening connection respectively embedded at the ends of two butt-jointed precast concrete bridge decks, and is directly hoisted and assembled at the construction site. The connection structure is reasonable, can meet the overall performance requirements, avoids the wet operation and on-site welding and other process operations of the traditional connection structure, improves the assembly construction efficiency, and is convenient for subsequent maintenance and repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is an overall schematic diagram of a bolted structure of a precast concrete bridge deck provided according to an embodiment of the present invention;

[0026] Figure 2 is an exploded schematic diagram of a bolted structure of a precast concrete bridge deck provided according to an embodiment of the present invention;

[0027] Figure 3It is a schematic structural diagram of a structure provided with prestressing tendons according to an embodiment of the present invention;

[0028] Figure 4 It is a partial schematic diagram of a connection structure provided according to an embodiment of the present invention;

[0029] Figure 5 It is a partial schematic diagram of a connection structure provided with prestressing tendons according to an embodiment of the present invention;

[0030] In the figure:

[0031] 1. Bridge deck; 2. First vertical steel plate; 3. First horizontal steel plate; 4. First vertical stud; 5. Extension part; 6. Through hole; 7. Mounting hole; 8. Bolt hole; 9. Second vertical steel plate; 10. Second horizontal steel plate; 11. Second vertical stud; 12. Nut; 13. Steel plate connector; 14. Ring-shaped vertical steel bar; 15. Horizontal steel bar; 16. Prestressing tendon; 17. Bolt; 18. Bellows. Specific embodiments

[0032] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0034] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0035] As Figure 1 , Figure 3 and Figure 4 shown, in the embodiment of the present invention, a bolted structure for precast concrete bridge decks is provided, which includes two adjacent precast concrete bridge decks 1 butt-jointed. A number of annular vertical steel bars 14 arranged along the length direction of the bridge deck and a number of transverse steel bars 15 arranged along the width direction of the bridge deck are tied at the ends of the bridge deck 1. Among them, the annular vertical steel bars 14 and the transverse steel bars 15 are jointly tied to form a steel bar mesh that matches the shape and structure of the bridge deck 1, facilitating the connection and embedding of connecting members such as vertical steel plates between the two bridge decks 1 and subsequent formwork support, pouring, and sealing.

[0036] A number of mutually paired first vertical steel plates 2 and second vertical steel plates 9 are respectively and spacedly embedded at the ends of the two bridge decks 1 along the width direction of the bridge deck. Among them, the steel plate surfaces of the first vertical steel plates 2 and the second vertical steel plates 9 are parallel to the length direction of the bridge deck or the steel plate surfaces extend along the length direction of the bridge deck.

[0037] The first vertical steel plates 2 and the second vertical steel plates 9 are respectively located between adjacent annular vertical steel bars 14 and are provided with a number of transverse steel bars 15 passing through them. The annular vertical steel bars 14 and the transverse steel bars 15 jointly act to thread and buckle the first vertical steel plates 2 and the second vertical steel plates 9 into the steel bar mesh at the ends of the bridge deck 1 for fixed connection with each other.

[0038] At the tops of the first vertical steel plates 2 and the second vertical steel plates 9, a first transverse steel plate 3 and a second transverse steel plate 10 arranged longitudinally along the width direction of the bridge deck are respectively fixed. An extension part 5 that extends outward and can be detachably fastened to the second transverse steel plate 10 is provided on the first transverse steel plate 3. The bottoms of the first vertical steel plates 2 and the second vertical steel plates 9 are detachably fastened and connected. The fixed connection between the bridge decks 1 is realized through upper-end lap fixation and lower-end fastening connection, which is convenient for disassembly and assembly and is convenient and easy to operate.

[0039] A number of first vertical stud bolts 4 and second vertical stud bolts 11 that extend downward and are embedded between the annular vertical steel bars 14 and the transverse steel bars 15 are respectively provided at the bottoms of the first transverse steel plate 3 and the second transverse steel plate 10. Through the vertical stud bolts, they are better embedded in the steel bar mesh formed by the annular vertical steel bars 14 and the transverse steel bars 15 of the bridge deck 1 to enhance the overall stability of the end connection.

[0040] Through the connection settings between the above-mentioned various component structures, the connection structure of the precast concrete bridge deck provided by the present invention is constituted. Its overall structure is reasonable and compact, which can not only meet the overall performance requirements, avoid the wet operation and on-site welding processes of traditional connection structures, but also improve the assembly construction efficiency and is convenient for subsequent maintenance and repair.

[0041] In some embodiments, the first vertical stud 4 and the second vertical stud 11 are uniformly arranged in an array along the length direction and the width direction of the bridge deck respectively within the steel bar grid formed by adjacent transverse steel bars 15 and adjacent circular vertical steel bars 14. The studs are embedded and fixed uniformly in the overall structure, with balanced stress and strong stability.

[0042] In some embodiments, referring to Figure 2 as shown, one end of the second vertical stud 11 is a threaded end with external threads. A plurality of bolt holes 8 for mating use are respectively formed in the second transverse steel plate 10 and the extension part 5 of the first transverse steel plate 3. The threaded end of the second vertical stud 11 passes through the bolt holes 8 in the second transverse steel plate 10 and the extension part 5 of the first transverse steel plate 3, and is tightened and fixed by nuts 12 on both sides of the bolt holes 8. Under the condition of meeting the connection performance of the overall structure, the above bolt connection method and structure are also convenient for on-site assembly construction and disassembly and maintenance, avoiding complex operations such as on-site welding processes.

[0043] Referring to Figure 2 as shown, the first vertical steel plate 2 and the second vertical steel plate 9 are of an inverted right trapezoid structure. Three through holes 6 for passing through the transverse steel bars 15 are uniformly spaced along the length direction of the bridge deck at the upper part of the first vertical steel plate 2 and the second vertical steel plate 9, and two through holes 6 for the transverse steel bars 15 are arranged horizontally along the length direction at the lower part of the first vertical steel plate 2 and the second vertical steel plate 9. The three upper through holes 6 and the two lower through holes 6 are integrally in an inverted right trapezoid, which helps to improve the flexural bearing capacity and tensile performance when the end connection of the bridge deck 1 is stressed, and improves the overall stability of the connection structure.

[0044] Specifically, in this embodiment, the inverted right trapezoid perforated steel plate has a wider upper part and a narrower lower part in the cross-sectional structure, which can increase the number of upper openings and improve the negative bending tension and shear performance of the connecting piece. In addition, the inverted trapezoid cross-sectional structure can partially replace the bottom stiffener of the connecting piece, which conforms to the bending stress distribution characteristics of the connecting piece.

[0045] In some embodiments, a circular mounting hole 7 is formed at the bottom of the first vertical steel plate 2 and the second vertical steel plate 9. The two mounting holes 7 are tightly connected by a steel plate connecting piece 13 with bolts 17 passing through the mating mounting holes 7 at both ends, as shown in Figure 2 、 Figure 4 as shown.

[0046] In some embodiments, both sides of the top surface of the first transverse steel plate 3 are flush with the top surfaces of the two bridge decks 1 respectively, which helps the flush docking between the bridge decks 1 and improves the connection flatness and overall structural stability between the bridge decks 1.

[0047] In some embodiments, epoxy resin glue is applied to the vertical side surfaces between the first vertical steel plate 2 and the second vertical steel plate 9, which not only helps to firmly connect the connection surfaces but also plays a role in buffering and stabilizing performance.

[0048] Reference Figure 3 、 Figure 5 As shown in the figure, a tension prestressing tendon 16 penetrating through two bridge decks 1 along the length direction of the bridge deck is provided between adjacent first vertical steel plates 2 and second vertical steel plates 9. Among them, a corrugated pipe 18 is embedded in the precast concrete bridge deck 1 for subsequent threading of the prestressing tendon 16.

[0049] In some embodiments, three rows of first vertical stud bolts 4 and second vertical stud bolts 11 are respectively arranged at intervals along the length direction of the bridge deck at the bottoms of the first transverse steel plate 3 and the second transverse steel plate 10.

[0050] The embodiment of the present invention also provides a construction method based on the above-mentioned bolted structure of the precast concrete bridge deck, which specifically includes the following steps:

[0051] A plurality of first vertical steel plates 2 are welded and fixed at one side of the bottom of the first transverse steel plate 3 at equal intervals along the width direction of the bridge deck. Three first vertical stud bolts 4 are welded and fixed at equal intervals between adjacent first vertical steel plates 2 along the width direction of the bridge deck, and one end of a precast concrete bridge deck 1 is embedded, configured as:

[0052] The first vertical steel plate 2 is located between the annular vertical steel bars 14 tied at the ends of adjacent bridge decks 1, the transverse steel bars 15 tied at the ends of the bridge deck 1 pass through the through holes 6 of the first vertical steel plate 2, and the first vertical stud bolts 4 are inserted between adjacent transverse steel bars 15 along the length direction of the bridge deck;

[0053] A plurality of second vertical steel plates 9 are welded and fixed at the bottom of the second transverse steel plate 10 at equal intervals along the width direction of the bridge deck, and one end of another precast concrete bridge deck 1 is embedded, configured as:

[0054] The first vertical steel plate 2 is located between the annular vertical steel bars 14 tied at the ends of adjacent bridge decks 1, and the transverse steel bars 15 tied at the ends of the bridge deck 1 pass through the through holes 6 of the first vertical steel plate 2;

[0055] First, hoist and position the bridge deck 1 embedded with the second vertical steel plate 9 on site, and then hoist the bridge deck 1 embedded with the first vertical steel plate 2 so that the first vertical steel plate 2 and the second vertical steel plate 9 are butt-jointed in pairs and epoxy resin glue is applied to the vertical end faces. In addition, the extension part 5 of the first transverse steel plate 3 overlaps the second vertical steel plate 9 and the bolt holes 8 of the extension part 5 and the bolt holes 8 of the second vertical steel plate 9 are aligned. The threaded ends of the second vertical stud bolts 11 pass through the bolt holes 8 of the second transverse steel plate 10 and the extension part 5 in sequence and are tightened and fixed by nuts 12 on both sides of the bolt holes 8;

[0056] Install the bolts 17 at both ends of the steel plate connector 13 into the mounting holes 7 of each pair of the first vertical steel plate 2 and the second vertical steel plate 9 and tighten and fix them;

[0057] Thread the prestressing tendon 16 through the bellows 18 reserved in the two precast concrete bridge decks 1 along the bridge deck length direction and tension the prestress to the design control stress value of the bridge deck 1.

[0058] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. A bolted connection structure for precast concrete bridge decks, comprising two adjacent precast concrete bridge decks butt-jointed to each other. The ends of the bridge decks are tied with circular vertical steel bars arranged along the length direction of the bridge deck and transverse steel bars arranged along the width direction of the bridge deck. It is characterized in that, At both ends of the two bridge decks, a number of first vertical steel plates and second vertical steel plates that are paired with each other are respectively embedded at intervals in the bridge width direction; The first vertical steel plates and the second vertical steel plates are respectively located between adjacent annular vertical steel bars and are provided with a number of the transverse steel bars passing through them. At the tops of the first vertical steel plates and the second vertical steel plates, a first transverse steel plate and a second transverse steel plate that are arranged longitudinally along the bridge width direction are respectively fixed. An extension part that extends outward and is detachably fastened to the second transverse steel plate is arranged on the first transverse steel plate. A detachable fastening connection is provided at the bottoms of the first vertical steel plate and the second vertical steel plate. A number of first vertical stud bolts and second vertical stud bolts that extend downward and are embedded between the annular vertical steel bars and the transverse steel bars are respectively provided at the bottoms of the first transverse steel plate and the second transverse steel plate.

2. The bolted structure of the precast concrete bridge deck according to claim 1, characterized in that, The first vertical stud bolts and the second vertical stud bolts are respectively arranged in an array form and evenly distributed in the grid formed by adjacent transverse steel bars and adjacent annular vertical steel bars along the bridge length direction and the bridge width direction.

3. The bolted structure of the precast concrete bridge deck according to claim 2, characterized in that, One end of the second vertical stud bolt is a threaded end provided with an external thread. A number of bolt holes for cooperation are respectively opened on the second transverse steel plate and the extension part of the first transverse steel plate. The threaded end of the second vertical stud bolt passes through the bolt holes on the second transverse steel plate and the extension part of the first transverse steel plate and is tightened and fixed by nuts on both sides of the bolt holes.

4. The bolted structure of the precast concrete bridge deck according to claim 3, wherein, The first vertical steel plate and the second vertical steel plate are of an inverted right trapezoid structure. Three through holes for passing the transverse steel bars are evenly spaced and arranged transversely along the bridge length direction at the upper part of the first vertical steel plate and the second vertical steel plate. Two through holes for the transverse steel bars are arranged transversely along the bridge length direction at the lower part of the first vertical steel plate and the second vertical steel plate. The three upper through holes and the two lower through holes as a whole are in an inverted right trapezoid shape.

5. The bolted structure of the precast concrete bridge deck according to claim 4, characterized in that, A circular installation hole is opened at the bottom of the first vertical steel plate and the second vertical steel plate. The two installation holes are tightly connected by a steel plate connecting piece with bolts provided at both ends and passing through the installation holes.

6. The bolted structure of the precast concrete bridge deck according to claim 1, characterized in that Both sides of the top surface of the first transverse steel plate are flush with the top surfaces of the two bridge decks.

7. The bolted structure of the precast concrete bridge deck according to claim 6, wherein Epoxy resin glue is coated on the vertical side surfaces between the first vertical steel plate and the second vertical steel plate.

8. The bolted structure of the precast concrete bridge deck according to claim 7, wherein, A tension prestressing tendon that penetrates through the two bridge decks along the bridge length direction is provided between adjacent first vertical steel plates and second vertical steel plates.

9. The bolted structure of the precast concrete bridge deck according to claim 5, characterized in that, Three rows of the first vertical stud bolts and the second vertical stud bolts are respectively arranged at intervals along the bridge length direction at the bottoms of the first transverse steel plate and the second transverse steel plate.

10. A construction method for the bolted connection structure of the precast concrete bridge deck according to any one of claims 1 to 9, characterized in that, Including the following steps: A number of first vertical steel plates are welded and fixed to one side of the bottom of the first transverse steel plate at even intervals in the bridge width direction. Three first vertical stud bolts are welded and fixed at even intervals in the bridge width direction between adjacent first vertical steel plates and are embedded into one end of a precast concrete bridge deck, configured as: The first vertical steel plate is located between the circular vertical steel bars tied at the ends of adjacent bridge decks. The transverse steel bars tied at the ends of the bridge deck pass through the through holes of the first vertical steel plate. The first vertical stud is inserted between adjacent transverse steel bars along the length direction of the bridge deck. A number of second vertical steel plates are welded and fixed at equal intervals along the width direction of the bridge deck at the bottom of the second transverse steel plate and embedded at the end of another precast concrete bridge deck, configured as: The first vertical steel plate is located between the circular vertical steel bars tied at the ends of adjacent bridge decks. The transverse steel bars tied at the ends of the bridge deck pass through the through holes of the first vertical steel plate. First, hoist and position the bridge deck embedded with the second vertical steel plate on site, and then hoist the bridge deck embedded with the first vertical steel plate so that the first vertical steel plate and the second vertical steel plate are butt-jointed in pairs, and epoxy resin glue is applied to the vertical end faces. In addition, the extension part of the first transverse steel plate overlaps on the second vertical steel plate, and the bolt holes of the extension part are aligned with the bolt holes of the second vertical steel plate. The threaded ends of the second vertical studs pass through the bolt holes of the second transverse steel plate and the extension part in sequence and are tightened and fixed by nuts on both sides of the bolt holes. Install the bolts at both ends of the steel plate connector into the installation holes of the first vertical steel plate and the second vertical steel plate respectively and tighten and fix them. Pass the prestressing tendon through the bellows reserved along the length direction of the two precast concrete bridge decks and tension the prestress to the design control stress value of the bridge deck.

Images