A main beam alignment device and construction method for a steel pipe concrete tied arch bridge

Abstract

The application relates to the technical field of bridge engineering, in particular to a main beam alignment device for a steel pipe concrete tied-arch bridge and a construction method thereof. The alignment device comprises a fixed assembly and a movable assembly. The fixed assembly comprises a fixed sleeve and a fixed rod, the fixed rod is slidably inserted into the fixed sleeve, a driving assembly capable of driving the fixed rod to reciprocate is arranged on the outer wall of the fixed sleeve, the movable assembly comprises a movable groove and a plurality of limiting rods, the plurality of limiting rods are symmetrically arranged on the groove walls on the two sides of the movable groove, the axial directions of the limiting rods are parallel to the width direction of the movable groove, the limiting rods can reciprocate along the width direction of the movable groove, and when the fixed rod extends into the movable groove, one end of the limiting rod extending into the movable groove can abut against the fixed rod. The application further discloses a main beam construction method for a steel pipe concrete tied-arch bridge. Through cooperation of the fixed assembly and the movable assembly, the application has the effect of facilitating suspension connection of adjacent beam segment components.

Description

Technical Field

[0001] This application relates to the technical field of bridge engineering, and in particular to a main beam alignment device and construction method for a steel-concrete composite tied arch bridge. Background Technology

[0002] Bridge construction is a highly complex and far-reaching undertaking, encompassing multiple disciplines and technical fields such as civil engineering, mechanical engineering, and meteorology. It is also closely related to the natural environment and human activities, resulting in a wide variety of bridge construction methods. Furthermore, the increasing variety of modern bridge types, their ever-larger spans, the prefabrication of components, advancements in structural design methods, and the development of machinery and equipment have all significantly promoted the progress and development of bridge construction methods, leading to a diverse range of approaches.

[0003] Among them, cantilever construction is a commonly used bridge construction method. Cantilever construction is suitable for bridge types such as large-span cantilever beams. The basic construction sequence of cantilever construction includes prefabrication, relocation, stacking, transportation, lifting, and assembly of beam segments. Figure 1 As shown, the main bridge 1 is a tied arch bridge with a steel-concrete composite structure and a route layout of 190m + 260m + 260m + 190m = 900m. The main bridge 1 is divided into four construction sections according to the route layout: the first construction section 11, the second construction section 12, the third construction section 13, and the fourth construction section 14. The first construction section 11 and the fourth construction section 14 are located above the land, and the beam components are directly assembled using a self-propelled crane. The second construction section 12 and the third construction section 13 are located above the water, and the beam components are directly assembled using a bridge deck crane. The piers below the first construction section 11 to the fourth construction section 14 are numbered 15#, 16#, 17#, 18#, and 19# respectively.

[0004] When lifting and installing beam segments in each construction section, a self-propelled crane or bridge crane is first required. However, during the lifting process, the beam segments will swing in the air due to the influence of wind, making it difficult to accurately align adjacent beam segments. Summary of the Invention

[0005] To facilitate the connection of adjacent beam segments during hoisting, this application provides a main beam alignment device and construction method for a steel-concrete tied arch bridge.

[0006] In a first aspect, this application provides a main beam alignment device for a steel-concrete composite tied arch bridge, which adopts the following technical solution:

[0007] A main beam alignment device for a steel-concrete composite tied arch bridge includes a fixed component and a movable component. The fixed component includes a fixed sleeve and a fixed rod, the fixed rod being slidably inserted into the fixed sleeve. A driving component capable of driving the fixed rod to reciprocate is provided on the outer wall of the fixed sleeve. The movable component includes a movable groove and several limiting rods, the limiting rods being symmetrically arranged on the groove walls on both sides of the movable groove. The axial direction of each limiting rod is parallel to the width direction of the movable groove, and each limiting rod can reciprocate along the width direction of the movable groove. When the fixed rod extends into the movable groove, one end of the limiting rod extending into the movable groove can abut against the fixed rod.

[0008] By adopting the above technical solution, when assembling adjacent beam segments, the fixed components are first installed on the already fixed beam segments, and then the movable components are installed on the beam segments to be connected. A self-propelled crane or bridge crane is used to lift the beam segments to be connected, so that the ends of the adjacent beam segments with the fixed and movable components are initially aligned. Driven by the drive component, the end of the fixed rod extending from the fixed sleeve moves into the movable groove. Then, the limiting rods on both sides of the movable groove are adjusted to abut against the sides of the fixed rod, so that the fixed rod is in the middle position of the movable groove, and the end faces of the fixed sleeve and the movable groove are aligned, thus aligning the end faces of the adjacent beam segments. The drive component reverses, causing the fixed rod to move into the fixed sleeve, which in turn causes the movable component to move towards the fixed component, thus moving the beam segments to be connected towards the already fixed beam segments until the end faces of the adjacent beam segments abut against each other and can be stably joined together, facilitating welding and bolting connections between the adjacent beam segments.

[0009] Optionally, the fixing rod includes a trapezoidal connecting rod, with a first fixing rod provided on the upper side of the trapezoidal connecting rod and a second fixing rod provided on the lower side of the trapezoidal connecting rod. The length directions of the first fixing rod and the second fixing rod are both parallel to the length direction of the trapezoidal connecting rod. First limiting strips are provided on both sides of the second fixing rod, and the first limiting strips are all opened along the length direction of the second fixing rod. The fixing sleeve has a first limiting groove adapted to the fixing rod.

[0010] By adopting the above technical solution, when one end of the fixed rod moves into the movable groove, the relative movement of the limiting rods on both sides is adjusted. Because the beam segment to be connected is in a suspended state, when one end of multiple limiting rods abuts against the two sides of the trapezoidal connecting rod in the fixed rod, the reaction force on the limiting rod pushes the movable component to move, so that the fixed rod is adjusted to the middle position of the movable groove. And because the two sides of the trapezoidal connecting rod are relatively inclined slopes, when the limiting rod moves towards the trapezoidal connecting rod until it abuts against the two sides of the trapezoidal connecting rod, it will apply a downward force to the trapezoidal connecting rod, so that the movable component moves upward until the bottom surface of the movable groove abuts against the bottom surface of the fixed rod, so that the end face of the fixed component and the end face of the movable component are aligned, thus making the end faces of adjacent beam segment components aligned.

[0011] Optionally, the driving assembly includes a motor fixed to the outer wall of the fixed sleeve, the motor being arranged along the width direction of the fixed sleeve, and the output shaft of the motor being connected to a transmission gear; a connecting hole is provided on the outer side of the upper side of the fixed sleeve, the connecting hole communicating with the first limiting groove; a first tooth is provided on the side of the first fixing rod away from the trapezoidal connecting rod, and the transmission gear meshes with the first tooth.

[0012] By adopting the above technical solution, a first tooth is provided on the upper side of the first fixed rod, and a transmission gear connected to the motor output shaft meshes with the first tooth, so that the fixed rod can reciprocate within the fixed sleeve under the drive of the motor.

[0013] Optionally, both sides of the fixing sleeve are connected to a first fixing plate. The side of the first fixing plate away from the fixing sleeve is bent downward to form a second fixing plate. A plurality of first abutting bolts are provided on each of the second fixing plates. One end of each of the first abutting bolts passes through the second fixing plate. The first abutting bolts are all arranged along the length direction of the second fixing plate.

[0014] By adopting the above technical solution, when installing the fixing component, the fixing sleeve is first placed in the middle position on the upper side of the beam segment component, so that the sides of the upper part of the beam segment component are located between the second fixing plates on both sides. Then, the first abutting bolt is adjusted so that one end of the first abutting bolt abuts against both sides of the beam segment component, thereby enhancing the connection stability between the fixing component and the beam segment component.

[0015] Optionally, a third fixing plate is connected to the side of the second fixing plate away from the first fixing plate. The third fixing plate is parallel to the first fixing plate. Each third fixing plate is provided with a plurality of second abutting bolts. One end of each second abutting bolt passes through the third fixing plate. The second abutting bolts are all arranged along the length direction of the third fixing plate.

[0016] By adopting the above technical solution, a third fixing plate is connected to the second fixing plate. The two sides of the upper part of the beam segment can be clamped between the first fixing plate, the second fixing plate and the third fixing plate. Furthermore, a second abutting bolt is provided on the third fixing plate. Adjusting the second abutting bolt to make it abut against the beam segment further enhances the connection stability between the fixing component and the beam segment.

[0017] Optionally, a plurality of threaded connection holes are symmetrically formed on the groove walls on both sides of the movable groove, and the threaded connection holes cooperate with the limiting rod; the limiting rod includes a threaded section and a smooth section, the threaded section and the smooth section are rotatably connected, a rotating connecting rod is provided on the end face of one end of the threaded section, an abutment plate is provided on the end of the rotating connecting rod away from the threaded section, and a nut is connected to the other end of the threaded section; a rotating connecting groove is formed on the end face of one end of the smooth section, which cooperates with the rotating connecting rod and the abutment plate, and a rotating shaft is rotatably connected to the other end of the smooth section, and rollers are rotatably connected to both ends of the rotating shaft.

[0018] By adopting the above technical solution, when one end of the fixed rod moves into the movable groove, the nut is turned to move the threaded section toward the fixed rod. The threaded section pushes the smooth section to move toward the fixed rod as well, so that the roller abuts against the inclined side of the trapezoidal connecting rod in the fixed rod, and a downward force is applied to the trapezoidal connecting rod, so that the lower side of the fixed rod abuts against the bottom surface of the movable groove.

[0019] Optionally, a plurality of second limiting strips are provided on the rod body of the smooth section, and the plurality of second limiting strips are provided along the length direction of the smooth section. A plurality of grooves that cooperate with the second limiting strips are provided on the inner wall of the threaded connection hole.

[0020] By adopting the above technical solution, when the threaded section moves in the threaded connection hole by tightening the nut, a second limiting strip is provided on the rod of the smooth section. The second limiting strip is engaged in the groove. While the smooth section is pushed forward by the threaded section, the smooth section will not rotate with the threaded section, ensuring that the sleeve can keep its own length direction parallel to the length direction of the trapezoidal connecting rod.

[0021] Optionally, a second tooth is provided on the bottom surface of the movable groove, and a tooth groove is provided on the bottom surface of the second fixed rod, the tooth groove cooperating with the second tooth.

[0022] By adopting the above technical solution, when the lower side of the fixed rod abuts against the bottom surface of the movable groove, the second tooth meshes with the tooth groove. When the motor is started again, the fixed rod moves into the fixed sleeve under the drive of the motor. Because the fixed rod meshes with the bottom surface of the movable groove, the fixed rod drives the movable groove to move towards the fixed sleeve, thereby moving the beam segment component to be connected towards the fixed beam segment component until the end faces of the adjacent beam segment components abut against each other.

[0023] Secondly, this application provides a method for constructing the main beam of a steel-concrete composite tied arch bridge, employing the following technical solution:

[0024] Step 1: Construct the main bridge foundation and substructure, and complete the construction of the main pier body and transition pier abutments;

[0025] Step 2: Several temporary supports are set at the bottom of the first, second, third and fourth construction sections. The temporary supports are set at equal intervals. Jacks are set on the top of each temporary support and adjusted to the design elevation.

[0026] Step 3: First, use a self-propelled crane to lift the beam segments above piers #16 and #18 on both sides of the riverbank to form a working surface. Then, install a bridge deck crane and alignment device on the working surface, install the fixed components onto the fixed beam segments, and install the movable components onto the beam segments to be connected. Then, use the self-propelled crane and / or bridge deck crane to lift and connect the beam segments to be connected.

[0027] Step 4: Use self-propelled cranes to hoist beam components for the first and fourth construction sections on both sides of the riverbank. During the construction of the first construction section, the beams are assembled sequentially from pier #16 to pier #15. During the construction of the fourth construction section, the beams are assembled sequentially from pier #18 to pier #19.

[0028] Step 5: Use a bridge deck crane to hoist the beam components of the second and third construction sections. The bridge deck crane will simultaneously suspend and assemble the beams from piers 16 and 18 towards pier 17 until all remaining parts are completed.

[0029] By adopting the above technical solutions and using the cantilever construction process to construct the main beam segments of the main bridge, the construction speed is relatively fast. Because the first and fourth construction segments are located above land, they are constructed using self-propelled cranes, while the second and third construction segments are located above the river, they are constructed using bridge deck cranes. Only two sets of bridge deck cranes are needed, resulting in less construction investment. Furthermore, the four construction segments are constructed independently without the need for connection.

[0030] Optionally, the beam segment components include several main longitudinal beams, several transverse beams, and several small longitudinal beams. In step two, several temporary supports are pre-installed along the length of the main longitudinal beams on the underside of the main longitudinal beams to be installed. The fixed components are installed on the fixed main longitudinal beams, and the movable components are installed on the main longitudinal beams to be connected. The main longitudinal beams, transverse beams, and small longitudinal beams are hoisted and suspended in sequence. After step three is completed, steps four and five are carried out simultaneously.

[0031] By adopting the above technical solution, temporary supports are set below the main longitudinal beams to support the beam segments; steps four and five can be carried out simultaneously, improving the construction efficiency of cantilever construction and saving construction time.

[0032] In summary, this application includes at least one of the following beneficial technical effects:

[0033] 1. By using fixed and movable components together, the end faces of adjacent beam segments abut against each other, reducing the swaying of the beam segments to be connected due to suspension, and facilitating welding or bolting connections between adjacent beam segments.

[0034] 2. It is equipped with a first fixing plate, a second fixing plate and a third fixing plate, and the second fixing plate is equipped with a first abutting bolt and the third fixing plate is equipped with a second abutting bolt, which facilitates the installation and disassembly of the alignment device. Attached Figure Description

[0035] Figure 1 This is a structural schematic diagram of the main bridge in this application.

[0036] Figure 2 This is a three-dimensional structural schematic diagram of the alignment device in this application.

[0037] Figure 3 This is a cross-sectional view of the fixing component along the width direction in Embodiment 1 of this application.

[0038] Figure 4 This is a schematic diagram of the structure of the active component in Embodiment 1 of this application.

[0039] Figure 5 This is a schematic diagram of the limiting rod in Embodiment 1 of this application.

[0040] Figure 6 This is a partial structural schematic diagram of the alignment device in Embodiment 2 of this application.

[0041] Reference numerals: 1. Main bridge; 11. First construction section; 12. Second construction section; 13. Third construction section; 14. Fourth construction section; 15. Main longitudinal beam one; 16. Main longitudinal beam two; 2. Fixing component; 21. Fixing sleeve; 211. First limiting groove; 212. Connecting hole; 213. First fixing plate; 214. Second fixing plate; 2141. First abutting bolt; 2142. First abutting plate; 215. Third fixing plate; 2151. Second abutting bolt; 216. Fourth fixing plate; 217. Fifth fixing plate; 2171. Short rod; 2172. Sliding rod; 2173. Sliding groove; 218. Sixth fixing plate; 219. Seventh fixing plate 2110, Fixed groove; 22, Fixed rod; 221, Trapezoidal connecting rod; 222, First fixed rod; 2221, First tooth; 223, Second fixed rod; 2231, First limiting strip; 2232, Tooth groove; 3, Movable component; 31, Movable groove; 311, Threaded connecting hole; 3111, Groove; 312, Second tooth; 32, Limiting rod; 321, Threaded section; 3211, Rotating connecting rod; 3212, Abutting plate; 3213, Nut; 322, Smooth section; 3221, Rotating connecting groove; 3222, Second limiting strip; 323, Rotating shaft; 324, Roller; 4, Drive component; 41, Motor; 42, Transmission gear. Detailed Implementation

[0042] The following is in conjunction with the appendix Figure 1 To be continued Figure 6 This application will be described in further detail below.

[0043] Example 1:

[0044] In this embodiment, the beam segment mainly includes a main beam, which comprises several main longitudinal beams, several transverse beams, and several small longitudinal beams. The main longitudinal beams, transverse beams, and small longitudinal beams are hoisted and assembled sequentially. The main longitudinal beams adopt an I-shaped cross section, with a height of 2.5m, a top plate of 800×36mm, a bottom plate of 900×48mm, and a web thickness of 20mm. The small longitudinal beams also adopt an I-shaped cross section, with a top plate of 600×24mm, a bottom plate of 400×18mm, and a web thickness of 12mm. The main longitudinal beams, transverse beams, and small longitudinal beams are connected by bolts and welds, with the top plate of the I-beam welded and the web and bottom plates bolted together.

[0045] To facilitate the connection between adjacent main longitudinal beams during hoisting and assembly, this application discloses a main beam alignment device for a steel-concrete composite tied arch bridge:

[0046] A main beam alignment device for a steel-concrete composite tied arch bridge, referring to Figure 2The system includes a first main longitudinal beam 15, a second main longitudinal beam 16, a fixed component 2, and a movable component 3. The fixed component 2 is fixedly installed on the top of the first main longitudinal beam 15, and the movable component 3 is fixedly installed on the top of the second main longitudinal beam 16. The fixed component 2 includes a fixed sleeve 21 and a fixed rod 22. The length direction of the fixed sleeve 21 is parallel to the length direction of the first main longitudinal beam 15. The fixed rod 22 is slidably inserted into the fixed sleeve 21, with one end of the fixed rod 22 extending out of the fixed sleeve 21. A drive component 4 capable of driving the fixed rod 22 to reciprocate is provided on the outer wall of the fixed sleeve 21. The movable component 3 includes a movable groove 31 and several limiting rods 32. The length direction of the main longitudinal beam 16 is parallel to the length direction of the main longitudinal beam 16. Several limiting rods 32 are symmetrically arranged on the groove walls on both sides of the movable groove 31. The limiting rods 32 are all arranged along the length direction of the groove walls on both sides of the movable groove 31. The axial direction of the limiting rods 32 is parallel to the width direction of the movable groove 31. The limiting rods 32 can slide back and forth along the width direction of the movable groove 31. When the fixed rod 22 extends into the movable groove 31, the end of the limiting rod 32 that extends into the movable groove 31 can abut against the fixed rod 22, so that the fixed rod 22 is located in the middle position of the bottom of the movable groove 31, thereby aligning the adjacent end faces of the main longitudinal beam 15 and the main longitudinal beam 16.

[0047] Specifically, refer to Figure 2 and Figure 3 The fixed rod 22 includes a trapezoidal connecting rod 221, the cross-sectional shape of which is an isosceles trapezoid. A first fixed rod 222 is fixedly installed on the upper side of the trapezoidal connecting rod 221, the length direction of which is parallel to the length direction of the trapezoidal connecting rod 221. A second fixed rod 223 is fixedly installed on the lower side of the trapezoidal connecting rod 221, the length direction of which is parallel to the length direction of the trapezoidal connecting rod 221. A first limiting strip 2231 is provided on both sides of the second fixed rod 223, and the first limiting strip 2231 is opened along the length direction of the second fixed rod 223. By providing the first limiting strip 2231, the stability of the fixed rod 22 during the sliding process is enhanced. In order to adapt to the shape of the fixed rod 22, the fixed sleeve 21 is provided with a first limiting groove 211 that matches the fixed rod 22.

[0048] After the work surface and bridge deck crane are installed, the next section of main longitudinal beam 2, 16, is lifted. The fixing component 2 is installed on the already installed main longitudinal beam 1, 15. Before lifting, the movable component 3 is installed on main longitudinal beam 2, 16. Then, the lifting of main longitudinal beam 2, 16 begins. When main longitudinal beam 2, 16 is lifted to a position close to main longitudinal beam 1, 15, the position is initially adjusted using the bridge deck crane or self-propelled crane, so that the end face of the main longitudinal beam 15 with the fixing component 2 is initially aligned with the end face of the main longitudinal beam 2, 16 with the movable component 3. The drive component 4 then moves one end of the fixing rod 22 towards the movable groove 31. When one end of the fixing rod 22 extends into the movable groove 31... Adjust the relative movement of the limiting rods 32 on both sides to abut against the two sides of the trapezoidal connecting rod 221. Since the fixed rod 22 is fixed, when the limiting rod 32 abuts against the two sides of the trapezoidal connecting rod 221, the limiting rod 32 will be subjected to the reaction force of the trapezoidal connecting rod 221, thereby causing the two walls of the movable groove 31 to move, so that the fixed rod 22 is located in the middle position of the two walls of the movable groove 31. The two sides of the trapezoidal connecting rod 221 will also give the limiting rods 32 on both sides an upward force, so that the lower side of the fixed rod 22 abuts against the bottom surface of the movable groove 31. At this time, the end face of the first main longitudinal beam 15 and the end face of the second main longitudinal beam 16 are aligned, completing the initial alignment adjustment of the first main longitudinal beam 15 and the second main longitudinal beam 16.

[0049] Reference Figure 2 and Figure 3 The drive assembly 4 includes a motor 41 fixedly mounted on the upper side of the fixed sleeve 21. The motor 41 is arranged along the width direction of the fixed sleeve 21. The output shaft of the motor 41 is connected to a transmission gear 42. A connecting hole 212 is opened on the outer side of the upper side of the fixed sleeve 21. The connecting hole 212 communicates with the first limiting groove 211. A first tooth 2221 is opened on the side of the first fixed rod 222 away from the trapezoidal connecting rod 221. The transmission gear 42 is placed in the connecting hole 212 so that the transmission gear 42 meshes with the first tooth 2221. The transmission gear 42 drives the fixed rod 22 to reciprocate within the fixed sleeve 21.

[0050] To facilitate the installation of fixed component 2 onto main longitudinal beam 15 and movable component 3 onto main longitudinal beam 26, refer to... Figure 2 and Figure 3Both sides of the fixing sleeve 21 are fixedly connected to a first fixing plate 213. The side of the first fixing plate 213 away from the fixing sleeve 21 is bent downward to form a second fixing plate 214. Several first abutting bolts 2141 are provided on the second fixing plate 214. The several first abutting bolts 2141 are respectively arranged along the length direction of the second fixing plate 214. One end of each first abutting bolt 2141 passes through the second fixing plate 214 and abuts against the side of the top plate of the main longitudinal beam 15. In order to increase the friction between the first abutting bolt 2141 and the main longitudinal beam 15, a first abutting plate 2142 is provided at the end of the first abutting bolt 2141 that abuts against the main longitudinal beam 15. The first abutting plate 2142 is made of a hard and rough material.

[0051] Reference Figure 2 and Figure 3 A third fixing plate 215 is fixedly connected to the side of the second fixing plate 214 away from the first fixing plate 213. The first fixing plate 213 and the third fixing plate 215 are connected by bolts. The third fixing plate 215 is parallel to the first fixing plate 213. Several second abutting bolts 2151 are provided on the third fixing plate 215. The several second abutting bolts 2151 are respectively arranged along the length direction of the third fixing plate 215. The second abutting bolts 2151 pass through the third fixing plate 215 and abut against the lower side of the top plate of the main longitudinal beam 15. A first abutting plate 2142 is also provided at the end of the second abutting bolt 2151 that abuts against the main longitudinal beam 15 to increase the friction between the second abutting bolt 2151 and the main longitudinal beam 15 and enhance the connection strength between the fixing component 2 and the main longitudinal beam 15.

[0052] When installing the fixing component 2, first place the fixing sleeve 21 in the middle of the top plate of the main longitudinal beam 15, then adjust the first abutting bolts 2141 on both sides to make the first abutting bolts 2141 firmly abut against the main longitudinal beam 15, and initially fix the fixing component 2 on the main longitudinal beam 15. Then, bolt the third fixing plate 215 to the second fixing plate 214, and then adjust the second abutting bolt 2151 to make it abut against the main longitudinal beam 15, thereby realizing a stable connection between the fixing component 2 and the main longitudinal beam 15. In actual implementation, in order to make the connection between the fixing component 2 and the main longitudinal beam 15 more stable, spot welding can be used to reinforce the two, further improving the connection stability between the fixing component 2 and the main longitudinal beam 15.

[0053] It should be noted that in this embodiment, the connection method between the movable component 3 and the second main longitudinal beam 16 is the same as the connection method between the fixed component 2 and the first main longitudinal beam 15, as shown in the reference. Figure 2The side walls on both sides of the movable groove 31 are also provided with first fixing plates 213. The side of the first fixing plate 213 away from the side wall of the movable groove 31 is also bent downward to form a second fixing plate 214. The second fixing plate 214 is connected to a third fixing plate 215, which will not be described in detail here.

[0054] Reference Figure 4 and Figure 5 A plurality of threaded connection holes 311 are symmetrically provided on the walls of the movable groove 31 on both sides. The threaded connection holes 311 are all provided along the thickness direction of the groove wall of the movable groove 31. The limiting rod 32 includes a threaded section 321 and a smooth section 322. The threaded section 321 and the smooth section 322 are rotatably connected. A rotating connecting rod 3211 is provided on the end face of one end of the threaded section 321. An abutment plate 3212 is provided on the end of the rotating connecting rod 3211 away from the threaded section 321. A nut 3213 is connected to the other end of the threaded section 321. A rotating connecting groove 3221 that mates with the rotating connecting rod 3211 and the abutment plate 3212 is provided on the end face of one end of the smooth section 322. The rotating connecting rod 3211 and the abutment plate 3212 are connected to the smooth section 322. The threaded section 321 and the smooth section 322 are rotatably connected within the rotating connecting groove 3221. The other end of the smooth section 322 is rotatably connected to the rotating shaft 323. The smooth section 322 is connected to the middle of the rotating shaft 323. The two ends of the rotating shaft 323 are rotatably connected to rollers 324. When the fixed rod 22 extends into the movable groove 31, the limiting rod 32 passes through the threaded connecting hole 311 and abuts against the fixed rod 22. Tightening the nut 3213 drives the threaded section 321 to rotate and pushes the smooth section 322 to move towards the fixed rod 22. The outer surface of the roller 324 abuts against the inclined surface of the trapezoidal connecting rod 221. As the roller 324 moves, the bottom surface of the fixed rod 22 abuts against the bottom of the movable groove 31.

[0055] Reference Figure 4 and Figure 5 The smooth section 322 has several second limiting strips 3222 on its shaft, and these second limiting strips 3222 are all opened along the length direction of the smooth section 322. The inner wall of the threaded connection hole 311 has several grooves 3111 that cooperate with the second limiting strips 3222. When the threaded section 321 rotates, because the second limiting strips 3222 are engaged in the grooves 3111, the threaded section 321 will not drive the smooth section 322 to rotate, so the roller 324 can maintain a horizontal setting. When the roller 324 abuts against the trapezoidal connecting rod 221, the roller 324 can apply a downward force to the trapezoidal connecting rod 221.

[0056] Reference Figure 2 and Figure 4The bottom surface of the movable groove 31 is provided with a second tooth 312, and the bottom surface of the second fixed rod 223 is provided with a tooth groove 2232. The roller 324 pushes the trapezoidal connecting rod 221 to move downward. The bottom surface of the second fixed rod 223 abuts against the bottom surface of the movable groove 31, and the tooth groove 2232 meshes with the second tooth 312. At this time, the starter motor 41 reverses and drives the fixed rod 22 to move into the fixed sleeve 21. Because the bottom surface of the second fixed rod 223 meshes with the bottom surface of the movable groove 31, the fixed rod 22 retracts and drives the movable groove 31 to move, thereby moving the second main longitudinal beam 16 towards the first main longitudinal beam 15 until the end face of the first main longitudinal beam 15 abuts against the end face of the second main longitudinal beam 16. Then, the first main longitudinal beam 15 and the second main longitudinal beam 16 are fixedly connected by welding and bolts.

[0057] The implementation principle of this application embodiment is as follows: a fixed component 2 is pre-installed on the main longitudinal beam 15, and a movable component 3 is pre-installed on the main longitudinal beam 26. The main longitudinal beam 26 is suspended to the height of the main longitudinal beam 15 by a bridge crane or a self-propelled crane. The fixed rod 22 is driven by the motor 41 to move into the movable groove 31. The limiting rod 32 is adjusted so that the limiting rods 32 on both sides of the groove wall of the movable groove 31 move relative to each other. The roller 324 at one end of the limiting rod 32 abuts against the inclined surface of the trapezoidal connecting rod 221 in the fixed rod 22. As the limiting rod 32 moves, the limiting rod 32... Push the fixed rod 22 downward and position it in the middle of the two sides of the movable groove 31. The bottom surface of the second fixed rod 223 engages with the bottom surface of the movable groove 31. The reverse motor 41 drives the fixed rod 22 to move into the fixed sleeve 21, which in turn drives the movable groove 31 to move into the fixed sleeve 21. This causes the second main longitudinal beam 16 to move towards the first main longitudinal beam 15 until the end face of the second main longitudinal beam 16 abuts against the end face of the first main longitudinal beam 15, completing the alignment of the first main longitudinal beam 15 and the second main longitudinal beam 16. Then, the first main longitudinal beam 15 and the second main longitudinal beam 16 are fixedly connected.

[0058] Example 2:

[0059] The difference between this embodiment and Embodiment 1 is that:

[0060] Reference Figure 2 and Figure 6A fourth fixing plate 216 is fixedly connected to the lower side of the third fixing plate 215. The fourth fixing plate 216 is parallel to the third fixing plate 215, and the upper surface of the fourth fixing plate 216 abuts against the lower surface of the third fixing plate 215. The third fixing plate 215 and the fourth fixing plate 216 are fixedly connected by the second abutment bolt 2151. The side of the fourth fixing plate 216 near the main longitudinal beam 15 and / or the main longitudinal beam 26 is bent downward to form a fifth fixing plate 217. The fourth fixing plate 216 and the fifth fixing plate 217 form an L-shaped connector. Short rods 2171 are fixedly connected to the side of the fifth fixing plate 217 away from the main longitudinal beam 15. The axial direction of the short rods 2171 is perpendicular to the plate surface of the fifth fixing plate 217. A sliding rod 2172 is rotatably connected to the short rod 2171. A sliding groove 2173 is opened on the rod body of the sliding rod 2172. 3. A sixth fixing plate 218 is fixedly installed on the side of the fifth fixing plate 217 on the main longitudinal beam 16 away from the main longitudinal beam 16. The side of the sixth fixing plate 218 away from the fifth fixing plate 217 is bent upward to form a seventh fixing plate 219. The seventh fixing plate 219 is parallel to the fifth fixing plate 217. A fixing groove 2110 is formed between the fifth fixing plate 217, the sixth fixing plate 218 and the seventh fixing plate 219. When the end faces of the main longitudinal beam 15 and the main longitudinal beam 26 abut against each other, the sliding rod 2172 is moved so that the end of the sliding rod 2172 away from the short rod 2171 is engaged in the fixing groove 2110, which further improves the connection stability of the fixed component 2 and the movable component 3, thereby further improving the stability of the abutment between the main longitudinal beam 15 and the main longitudinal beam 26, and facilitating the welding and bolting connection of the main longitudinal beam 15 and the main longitudinal beam 26.

[0061] The implementation principle of this application embodiment is as follows: L-shaped connectors are provided on the lower side of the third fixing plate 215 of both the fixed component 2 and the movable component 3. The L-shaped connector on one side of the fixed component 2 is provided with a sliding rod 2172, and the L-shaped connector on one side of the movable component 3 is provided with a fixing groove 2110. When the end face of the first main longitudinal beam 15 and the end face of the second main longitudinal beam 16 abut against each other, the sliding rod 2172 is moved to engage in the fixing groove 2110, reducing the left and right swaying between the fixed component 2 and the movable component 3, further improving the stability of the first main longitudinal beam 15 and the second main longitudinal beam 16, and facilitating the connection between the two.

[0062] This application also discloses a construction method for the main beam of a steel-concrete composite tied arch bridge, which includes the following steps:

[0063] Step 1: Construct the foundation and substructure of the main bridge 1, complete the construction of the main pier body and transition pier abutment. The main bridge 1 adopts a structural system of arch pier consolidation and arch beam separation.

[0064] Step 2: Several temporary supports are set at the bottom of the first construction section 11, the second construction section, the third construction section 13 and the fourth construction section 14. The temporary supports are set at equal intervals. Jacks are set on the top of the temporary supports and adjusted to the design elevation.

[0065] Step 3: First, use a self-propelled crane to lift the beam segments above piers #16 and #18 on both sides of the riverbank to form a working surface. Then, install a bridge deck crane and alignment device on the working surface, install the fixed components onto the fixed beam segments, and install the movable components onto the beam segments to be connected. Then, use a self-propelled crane and / or a bridge deck crane to lift and connect the beam segments to be connected. A slewing crane or a gantry crane can be selected as the bridge deck crane.

[0066] Step 4: Use a self-propelled crane to hoist the beam components of the first construction section 11 and the fourth construction section 14 on both sides of the riverbank. When constructing the first construction section 11, the beams are assembled sequentially from pier #16 to pier #15. When constructing the fourth construction section 14, the beams are assembled sequentially from pier #18 to pier #19.

[0067] Step 5: Use a bridge deck crane to hoist the beam components of the second and third construction sections 13. The bridge deck crane will simultaneously suspend and assemble the beams from piers 16 and 18 towards pier 17 until all remaining parts are completed.

[0068] Furthermore, in step two, several temporary supports are pre-installed along the length of the main longitudinal beam on the underside of the main longitudinal beam to be installed; the fixed components are installed on the fixed main longitudinal beam, and the movable components are installed on the main longitudinal beam to be connected; several main longitudinal beams, several cross beams, and several small longitudinal beams are hoisted and suspended in sequence; after step three is completed, steps four and five are carried out simultaneously.

[0069] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A main beam alignment device for a steel-concrete composite tied arch bridge, characterized in that, Includes fixed components (2) and movable components (3); The fixing component (2) includes a fixing sleeve (21) and a fixing rod (22). The fixing rod (22) is slidably inserted into the fixing sleeve (21). The outer wall of the fixing sleeve (21) is provided with a driving component (4) that can drive the fixing rod (22) to move back and forth. The movable component (3) includes a movable groove (31) and a plurality of limiting rods (32). The plurality of limiting rods (32) are symmetrically arranged on the groove walls on both sides of the movable groove (31). The axial direction of the limiting rods (32) is parallel to the width direction of the movable groove (31), and the limiting rods (32) can slide back and forth along the width direction of the movable groove (31). When the fixed rod (22) extends into the movable groove (31), one end of the limiting rod (32) extending into the movable groove (31) can abut against the fixed rod (22); The fixing rod (22) includes a trapezoidal connecting rod (221), a first fixing rod (222) is provided on the upper side of the trapezoidal connecting rod (221), and a second fixing rod (223) is provided on the lower side of the trapezoidal connecting rod (221). The length direction of the first fixing rod (222) and the length direction of the second fixing rod (223) are both parallel to the length direction of the trapezoidal connecting rod (221). The second fixing rod (223) is provided with a first limiting strip (2231) on both sides, and the first limiting strip (2231) is opened along the length direction of the second fixing rod (223); The fixing sleeve (21) is provided with a first limiting groove (211) that is adapted to the fixing rod (22); A plurality of threaded connection holes (311) are symmetrically provided on the groove walls on both sides of the movable groove (31), and the threaded connection holes (311) cooperate with the limiting rod (32); The limiting rod (32) includes a threaded section (321) and a smooth section (322). The threaded section (321) and the smooth section (322) are rotatably connected. A rotating connecting rod (3211) is provided on the end face of one end of the threaded section (321). An abutment plate (3212) is provided on the end of the rotating connecting rod (3211) away from the threaded section (321). A nut (3213) is connected to the other end of the threaded section (321). The end face of one end of the smooth section (322) is provided with a rotating connecting groove (3221) that cooperates with the rotating connecting rod (3211) and the abutment plate (3212). The other end of the smooth section (322) is rotatably connected to a rotating shaft (323), and the two ends of the rotating shaft (323) are rotatably connected to rollers (324).

2. The main beam alignment device for a steel-concrete composite tied arch bridge according to claim 1, characterized in that, The drive assembly (4) includes a motor (41) fixed on the outer wall of the fixed sleeve (21). The motor (41) is arranged along the width direction of the fixed sleeve (21), and the output shaft of the motor (41) is connected to a transmission gear (42). A connecting hole (212) is provided on the outer side of the upper side of the fixing sleeve (21), and the connecting hole (212) communicates with the first limiting groove (211); The first fixing rod (222) has a first tooth (2221) on the side away from the trapezoidal connecting rod (221), and the transmission gear (42) meshes with the first tooth (2221).

3. The main beam alignment device for a steel-concrete composite tied arch bridge according to claim 1, characterized in that, Both sides of the fixing sleeve (21) are connected to a first fixing plate (213). The side of the first fixing plate (213) away from the fixing sleeve (21) is bent downward to form a second fixing plate (214). A plurality of first abutting bolts (2141) are provided on the second fixing plate (214). One end of each first abutting bolt (2141) passes through the second fixing plate (214). The first abutting bolts (2141) are all arranged along the length direction of the second fixing plate (214).

4. The main beam alignment device for a steel-concrete composite tied arch bridge according to claim 3, characterized in that, The second fixing plate (214) is connected to a third fixing plate (215) on the side away from the first fixing plate (213). The third fixing plate (215) is parallel to the first fixing plate (213). The third fixing plate (215) is provided with a plurality of second abutting bolts (2151). One end of the second abutting bolt (2151) passes through the third fixing plate (215). The second abutting bolts (2151) are all arranged along the length direction of the third fixing plate (215).

5. The main beam alignment device for a steel-concrete composite tied arch bridge according to claim 1, characterized in that, The smooth section (322) has several second limiting strips (3222) on its rod body. The several second limiting strips (3222) are all opened along the length direction of the smooth section (322). The inner wall of the threaded connection hole (311) has several grooves (3111) that cooperate with the second limiting strips (3222).

6. The main beam alignment device for a steel-concrete composite tied arch bridge according to claim 5, characterized in that, The bottom surface of the movable groove (31) is provided with a second tooth (312), and the bottom surface of the second fixed rod (223) is provided with a tooth groove (2232), which cooperates with the second tooth (312).

7. A method for constructing the main girder of a steel-concrete composite tied arch bridge, using the main girder alignment device as described in any one of claims 1-6, characterized in that, Includes the following steps: Step 1: Carry out the construction of the main bridge (1) foundation and substructure, and complete the construction of the main pier body and transition pier abutment; Step 2: Several temporary supports are set at the bottom of the first construction section (11), the second construction section (12), the third construction section (13) and the fourth construction section (14). The temporary supports are set at equal intervals. Jacks are set on the top of the temporary supports and adjusted to the design elevation. Step 3: First, use a self-propelled crane to lift the beam segments above piers 16 and 18 on both sides of the riverbank to form a working surface. Then, install a bridge deck crane and alignment device on the working surface, install the fixed component (2) onto the fixed beam segment, install the movable component (3) onto the beam segment to be connected, and then use the self-propelled crane and / or bridge deck crane to lift and connect the beam segment to be connected. Step 4: Use self-propelled cranes to hoist beam components for the first construction section (11) and the fourth construction section (14) on both sides of the riverbank. When constructing the first construction section (11), the beams are suspended from pier #16 to pier #15 in sequence. When constructing the fourth construction section (14), the beams are suspended from pier #18 to pier #19 in sequence. Step 5: Use a bridge deck crane to hoist the beam components of the second construction section (12) and the third construction section (13). The bridge deck crane will simultaneously suspend and assemble the beams from piers 16 and 18 towards pier 17 until all the remaining parts are completed.

8. The construction method for the main beam of a steel-concrete composite tied arch bridge according to claim 7, characterized in that, The beam segment components include several main longitudinal beams, several transverse beams and several small longitudinal beams. In step two, several temporary supports are pre-set along the length of the main longitudinal beams on the underside of the main longitudinal beams to be installed. The fixed component (2) is installed on the fixed main longitudinal beams, and the movable component (3) is installed on the main longitudinal beams to be connected. Several main longitudinal beams, several transverse beams and several small longitudinal beams are hoisted and suspended in sequence. After step three is completed, steps four and five are constructed simultaneously.

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