A construction method for precast beam construction using a threading auxiliary system

Abstract

The application discloses a construction method for the construction of multiple prefabricated beams by using a threading auxiliary system, wherein the threading auxiliary system comprises a steel strand threading device, an assembled positioning track, a guide power assisting device and a steel strand storage device, the assembled positioning track comprises a plurality of track assembling rods, three moving seats are arranged on the assembled positioning track, and the method comprises the following steps: S1, installing each device to the moving seat; S2, the steel strand storage device stores and positions; S3, moving each device to the positioning track on the construction site; S4, completing the front stretching and traction of the steel strand; S5, completing the threading work of the steel strand by using the device; S6, cutting the steel strand and moving upward, and completing the threading of other steel strands on the same prefabricated beam; and S7, moving the device on the track, and completing the threading of the steel strands in the prestressed holes of the remaining prefabricated beams. The construction method is suitable for the threading of the steel strands of multiple prestressed beams, has good construction efficiency and high safety.

Description

Technical Field

[0001] This invention relates to the field of building construction equipment technology, and specifically to a construction method for threading multiple precast beams using a threading auxiliary system. Background Technology

[0002] During the construction of precast beams, steel strands need to be threaded in two ways. However, due to the large span and long length of T-shaped precast beams for viaducts, the required steel strands are long and heavy. In prestressed construction, the process of threading steel strands is complex. Currently, steel strand threading is generally done manually or with a combination of manual and mechanical methods. The construction process is usually lengthy, and manual threading is labor-intensive, requires a large workforce, and is inefficient. Manual threading also requires significant space. Therefore, in the construction of bridges and large structures, steel strand threading machines are the most ideal threading machinery and the primary tool for threading steel strands into ducts during prestressed construction. While existing threading machines can complete the threading of individual strands in ordinary beams, they are not universally applicable.

[0003] In medium- or large precast beam processing plants, to improve overall processing efficiency and avoid repetitive hoisting and threading equipment, multiple cast-in-place precast beams are typically threaded together. However, the following problems still exist: Existing threading equipment has a complex structure, is heavy, and its integrated structure is difficult to process and adjust; existing threading equipment relies on bottom rollers for movement, but these rollers are unstable and prone to vibration during threading, affecting stability; existing threading equipment typically only has a single lifting adjustment mechanism, which allows for significant lifting, but poor fine-tuning and lateral adjustment. Furthermore, when threading steel strands, the strands lack a stable and reliable support structure, making strand release inconvenient. Summary of the Invention

[0004] The purpose of this invention is to provide a construction method for threading multiple precast beams using a threading auxiliary system, in order to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the technical solution adopted by this invention is as follows:

[0006] A construction method for threading strands using a strand threading auxiliary system during the construction of multiple precast beams, wherein the strand threading auxiliary system includes a strand threading device, an assembled positioning rail, a guiding assist device, and a strand storage device, wherein the assembled positioning rail includes multiple rail assembly rods, and a first movable seat, a second movable seat, and a third movable seat are provided on the assembled positioning rail, specifically including the following steps;

[0007] S1, the first movable seat, the second movable seat and the third movable seat are moved to the storage warehouse, and the steel strand threading equipment, the guiding assist equipment and the steel strand storage equipment are respectively installed on the upper end of the first movable seat, the second movable seat and the third movable seat;

[0008] S2, hoist the steel strand coil into the steel strand storage equipment. Each steel strand storage equipment is equipped with two sets of steel strand coils. The coil positioning push rod is used inside the steel strand storage equipment to press and position the steel strand coil from the rear.

[0009] S3: Use a tractor to move three mobile seats to the construction site; determine the length of the assembled positioning rails based on the length of multiple precast beams to be constructed, and then assemble the rail assembly rods to assemble a total of six sets of prefabricated positioning rails, with each mobile seat adapted to two sets of rails.

[0010] S4. Based on the location of the perforation on the precast beam, determine the position of the strand threading machine in the strand threading equipment. Adjust the guiding assist device and the strand storage device to be located behind the strand threading equipment. The guiding assist device includes a protective mesh frame and a strand booster. Pull out the strands from the strand storage device and first introduce them into the protective mesh frame, and then into the strand booster. At this time, a portion of the strands is gradually pulled out, and this portion is located between the strand threading equipment and the guiding assist device.

[0011] S5. Clean the area around the prestressed duct on the precast beam. Align the wire threading machine with the prestressed duct and introduce the steel strand from the entrance of the wire threading machine. Lead the wire out from the exit of the wire threading machine. Install the head positioning device at the head of the steel strand. Turn off the wire threading booster. Then start the wire threading machine to allow the steel strand to enter the prestressed duct until it reaches the other end of the prestressed duct.

[0012] S6. Use the steel strand cutting hydraulic pliers attached to the guide assist device to cut the steel strand, thereby completing the threading of a steel strand. If there are other prestressed ducts on the same prestressed beam, repeat step S5 to complete the threading of steel strands in other prestressed ducts.

[0013] S7. Without disassembling the entire equipment, push the steel strand threading device, guiding assist device, and steel strand storage device to the target location on the prefabricated positioning track. Repeat steps S4-S6 to complete the subsequent threading of steel strands on the prestressed beam.

[0014] Preferably, the assembled positioning track includes a straight track plate, an arc track plate, and a ramp plate. A first straight plate positioning groove is provided on the left end face of the straight track plate, and a first straight plate positioning block is provided on the other end face of the straight track plate.

[0015] A first arc-shaped plate positioning groove is provided on the left end face of the arc-shaped track plate, and a first arc-shaped plate positioning block is provided on the other end face of the arc-shaped track plate.

[0016] The ramp plate is triangular in shape, and a first corner plate positioning groove and a first corner plate positioning insert are respectively provided on the two right-angled surfaces of the ramp plate.

[0017] Preferably, the steel strand threading device includes a first threading main support frame, a first moving platform and a winch. A hydraulic jack assembly is connected to the end foot of the first threading main support frame. The hydraulic jack assembly is used for fine adjustment of the height of the steel strand threading device.

[0018] The winch is connected to the lower part of the first main support frame for threading the wire. A wire tensioning assembly is connected to the winch. A hook-up wheel assembly is connected to the first main support frame for threading the wire. One end of the wire tensioning assembly passes through the hook-up wheel assembly and is connected to the first moving platform.

[0019] The first mobile platform is connected inside the first main support frame and can move up and down under the action of the wire tensioning assembly;

[0020] The first mobile platform is provided with a first threading support frame and a second mobile platform, and the second mobile platform is connected to the first threading support frame through a transverse sleeve assembly; the threading machine is provided on the first mobile platform.

[0021] Preferably, the first main support frame includes a first base frame, four first vertical support rods connected to the first base frame, and a first top frame connected to the four first vertical support rods. The first vertical support rods are respectively installed on the four end corners of the first base frame by positioning screws.

[0022] The first mobile platform includes a first platform base support, a first platform vertical frame connected to the first platform base support, and a first platform lifting and positioning tube provided at the four corners of the first platform vertical frame, with the first platform lifting and positioning tube sleeved on the first vertical support rod.

[0023] The first platform vertical frame has a first structural reinforcing rod and a second structural reinforcing rod respectively installed in the left and right parts. There are two of each type of first and second structural reinforcing rod. The first through-beam secondary support is installed between adjacent first and second structural reinforcing rods.

[0024] Preferably, the second mobile platform includes a second platform support plate, the lower end of which is connected to a second platform pulley assembly, and the second platform support plate is connected to the first platform bottom support through the second platform pulley assembly;

[0025] The upper end of the second platform support plate is connected to the second platform frame. The threading machine is set on the second platform support plate inside the second platform frame. The end of the second platform frame is connected to the transverse sleeve assembly.

[0026] The transverse sleeve assembly includes a movable sleeve and a movable locking screw connected to the movable sleeve. The movable locking screw passes through the movable sleeve and connects to the first threaded auxiliary support.

[0027] Preferably, the winch is connected to the lower side of the first base frame;

[0028] The mounting wheel assembly includes a left support wheel assembly located at the lower left end of the first top frame and a right support wheel assembly located at the lower right end of the first top frame.

[0029] The wire tensioning assembly includes a tensioning main rope, a tensioning adapter, a first tensioning auxiliary rope, and a second tensioning auxiliary rope. The winch is connected to the tensioning adapter via the tensioning main rope. The tensioning adapter is connected to the first structural reinforcing rod via the first tensioning auxiliary rope. The tensioning adapter is connected to the second structural reinforcing rod via the second tensioning auxiliary rope.

[0030] The hydraulic jack assembly is connected to the first base frame. There are four sets of hydraulic jack assemblies, which are respectively connected to the four corners.

[0031] Preferably, the guiding assist device further includes a guiding support base, with a plurality of first guiding rods connected to the upper front end of the guiding support base and a plurality of second guiding rods connected to the upper rear end of the guiding support base;

[0032] The protective net frame is conical in shape and includes a first protective steel ring and a second protective steel plate. The radius of the first protective steel ring is larger than the radius of the second protective steel plate. Multiple third protective steel pipes are connected between the first protective steel ring and the second protective steel plate. A first guide rod is connected to the first protective steel ring, and a second guide rod is connected to the second protective steel plate. A steel strand through hole is provided in the middle of the second protective steel plate.

[0033] Preferably, the steel strand storage device includes a storage base frame, a steel strand positioning cage, and a storage support frame installed on the storage base frame;

[0034] The storage support frame includes a rear storage support and two sets of upper storage supports that are vertically connected to the upper front end of the rear storage support.

[0035] The length of the storage base frame is greater than that of the storage upper support frame. The upper end of the storage base frame is equipped with four first storage positioning slide rails, and the lower end of the storage upper support frame is equipped with a second storage limiting slide rail. Each steel strand positioning cage is adapted to two first storage positioning slide rails.

[0036] When installing the steel strand coil, use a crane to first lift the steel strand coil and place it in the steel strand positioning cage. Then, lift two steel strand positioning cages and place them on the first storage positioning slide rail in front of the storage support. Then, push the steel strand positioning cage. The upper end face of the steel strand positioning cage has a cage body groove. After pushing the steel strand positioning cage, the second storage limiting slide rail is inserted into the cage body groove. After the steel strand positioning cage is connected to the storage support, the cage body limiting pin is installed on the first storage positioning slide rail at the front end of the steel strand positioning cage.

[0037] Preferably, one end of the coil positioning push rod is connected to the rear support of the storage material, and the other end of the coil positioning push rod is connected to a push rod support plate; the coil positioning push rod is connected to the steel strand coil in the steel strand positioning cage through the push rod support plate.

[0038] The beneficial effects of this invention are:

[0039] This construction method, through decentralized material loading using different equipment and subsequent integrated application, improves the efficiency of collaborative operations. It is applicable to the simultaneous construction of steel strands in the prestressed holes of multiple precast beams within a precast yard, thus enhancing overall construction efficiency. Furthermore, it is also suitable for the construction of steel strands in a single precast beam, ensuring versatility in construction methods.

[0040] The use of the new type of steel strand threading equipment can improve the convenience of the entire equipment processing and the ease of movement and adjustment. The vertical adjustment is more accurate, and the movement can be made more conveniently and with higher precision through the moving track and its own sleeve.

[0041] The prefabricated structure of the steel strand threading equipment makes it lighter and more convenient to move. The prefabricated positioning rail supports the movement of the steel strand threading equipment, guiding assist equipment, and steel strand storage equipment, ensuring the stability of the backward force support during rebar transmission and facilitating subsequent movement. It allows for easy lateral movement without the need for traction vehicles or other large equipment. Furthermore, the prefabricated rail structure itself makes disassembly and assembly very convenient.

[0042] The use of guiding assistance equipment increases the safety of wire strand threading, effectively protecting construction workers from wire snapping injuries, and also increases the convenience of early-stage construction. By setting up a new type of wire strand storage device, two wire strand coils can be stored at a time, improving construction efficiency and making coil replacement easier. The cage and main frame are separable, facilitating subsequent disassembly and transportation. The entire equipment is a prefabricated structure; if the cage or support frame is damaged, it can be easily replaced, and the entire equipment is reusable.

[0043] When threading steel strands into the prestressed holes of multiple precast beams in a precast processing plant, as long as the construction equipment is prepared in advance, the threading construction of the next precast beam can be carried out quickly after the construction of one prestressed beam is completed. Attached Figure Description

[0044] To clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 This is a flowchart illustrating the overall process of using a beam-threading auxiliary system to thread beams during the construction of multiple precast beams.

[0046] Figure 2 This is a schematic diagram showing the structural positions of each device in the thread-threading auxiliary system during operation.

[0047] Figure 3 This is a schematic diagram of the overall structure of the steel strand threading equipment.

[0048] Figure 4 This is a schematic diagram of the overall structure of the guidance assist device.

[0049] Figure 5 This is a schematic diagram of the overall structure of the steel strand storage equipment.

[0050] Figure 6 This is a schematic diagram showing the location of the steel strand booster. Detailed Implementation

[0051] This invention provides a construction method for threading multiple precast beams using a threading assistance system. To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention is further described in detail below. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention.

[0052] The present invention will now be described in detail with reference to the accompanying drawings:

[0053] Example 1, combined with Figures 1 to 6 The content will be explained in detail:

[0054] A construction method for threading strands using a strand threading auxiliary system during the construction of multiple precast beams, wherein the strand threading auxiliary system includes a strand threading device 1, an assembled positioning rail 2, a guiding assist device 3, and a strand storage device 4, wherein the assembled positioning rail includes multiple rail assembly rods, and the assembled positioning rail 2 is provided with a first movable seat 21, a second movable seat 22, and a third movable seat 23, specifically including the following steps;

[0055] S1, the first movable seat 21, the second movable seat 22 and the third movable seat 23 are moved to the storage warehouse, and the steel strand threading device 1, the guiding assist device 3 and the steel strand storage device 4 are respectively installed on the upper end of the first movable seat 21, the second movable seat 22 and the third movable seat 23;

[0056] S2, hoist the steel strand coil into the steel strand storage device 4. Each steel strand storage device 4 is equipped with two sets of steel strand coils. The coil positioning push rod 5 is used in the steel strand storage device 4 to press and position the steel strand coil from the rear.

[0057] S3: Use a tractor to move three mobile seats to the construction site; determine the length of the assembled positioning rails based on the length of multiple precast beams to be constructed, and then assemble the rail assembly rods to assemble a total of six sets of prefabricated positioning rails, with each mobile seat adapted to two sets of rails.

[0058] S4. Based on the position of the perforation on the precast beam, determine the position of the strand threading machine 11 in the strand threading device 1. Adjust the guide assist device 3 and the strand storage device 4 to be located behind the strand threading device 1. The guide assist device 3 includes a protective net frame 31 and a strand booster 32. Pull out the strands in the strand storage device 4 and first introduce them into the protective net frame 31, and then into the strand booster 32. At this time, a portion of the strands is gradually pulled out, which is located between the strand threading device and the guide assist device 3.

[0059] S5. Clean the area around the prestressed duct on the precast beam. Align the wire threading machine 11 with the prestressed duct and introduce the steel strand from the inlet of the wire threading machine and lead it out from the outlet of the wire threading machine 11. Install the head positioning device at the head of the steel strand, turn off the steel strand booster 32, and then start the wire threading machine 11 to allow the steel strand to enter the prestressed duct until it reaches the other end of the prestressed duct.

[0060] S6. Use the steel strand cutting hydraulic pliers attached to the guide assist device 3 to cut the steel strand, thereby completing the threading of a steel strand. If there are other prestressed ducts on the same prestressed beam, repeat step S5 to complete the threading of steel strands in other prestressed ducts.

[0061] S7. Without disassembling the entire equipment, push the steel strand threading device, guide assist device 3, and steel strand storage device to move the above equipment to the target location on the prefabricated positioning track. Repeat steps S4-S6 to complete the subsequent threading of steel strands on the prestressed beam.

[0062] Example 2:

[0063] Based on Example 1, this example further discloses:

[0064] The prefabricated positioning track 2 includes a straight track plate 24, an arc track plate, and a ramp plate. A first straight plate positioning groove 241 is provided on the left end face of the straight track plate 24, and a first straight plate positioning insert is provided on the other end face of the straight track plate 24.

[0065] The left end face of the arc-shaped track plate is provided with a first arc-shaped plate positioning groove, and the other end face of the arc-shaped track plate is provided with a first arc-shaped plate positioning block; the grooving method of the arc-shaped track plate and the method of connecting the positioning block are the same, and the structure of the arc-shaped track plate is curved compared to the straight track plate.

[0066] The ramp plate is triangular in shape, with a first corner plate positioning groove and a first corner plate positioning insert on each of its two right-angled faces. The shape of the ramp plate can also be understood as a block shape. The ramp plate can be fixed, and its design is to help the moving seat move more easily onto the positioning track.

[0067] The steel strand threading device 1 includes a first threading main support frame 12, a first moving platform 13 and a winch 14. The end of the first threading main support frame 12 is connected to a hydraulic jack assembly 15, which is used for fine adjustment of the height of the steel strand threading device.

[0068] The winch 14 is connected to the lower part of the first main support frame 12. A wire tensioning assembly 16 is connected to the winch 14, and a hook-up wheel assembly is connected to the first main support frame 14. One end of the wire tensioning assembly 16 passes through the hook-up wheel assembly and is connected to the first moving platform 13. The hook-up wheel assembly is designed to support the wire tensioning assembly 16. The first moving platform 13 is connected inside the first main support frame 12 and can move up and down under the action of the wire tensioning assembly 16.

[0069] The first moving platform 13 is provided with a first threading auxiliary support 17 and a second moving platform 18. The second moving platform 18 is connected to the first threading auxiliary support 17 through a transverse sleeve assembly 19. The threading machine 11 is provided on the first moving platform 13.

[0070] The first main support frame 14 includes a first base frame 121, four first vertical support rods 122 connected to the first base frame 121, and a first top frame 123 connected to the four first vertical support rods 142. The first vertical support rods 143 are respectively installed on the four end corners of the first base frame 121 by positioning screws.

[0071] The first mobile platform 13 includes a first platform base support 131, a first platform vertical frame 132 is connected to the first platform base support 131, and a first platform lifting and positioning tube 133 is provided at the four corners of the first platform vertical frame 132. The first platform lifting and positioning tube 133 is sleeved on the first vertical support rod 122.

[0072] The first platform vertical frame 132 has a first structural reinforcing rod 134 and a second structural reinforcing rod 135 respectively in the left and right parts. There are two of each of the first structural reinforcing rod 134 and the second structural reinforcing rod 135. The first through-beam secondary support frame 17 is arranged between adjacent first structural reinforcing rods 134 and second structural reinforcing rods 135.

[0073] The second mobile platform 18 includes a second platform support plate 181, and a second platform pulley assembly 182 is connected to the lower end of the second platform support plate 181. The second platform support plate 181 is connected to the first platform bottom support 131 through the second platform pulley assembly 182.

[0074] The upper end of the second platform support plate 181 is connected to the second platform frame. The threading machine 11 is set on the second platform support plate inside the second platform frame. The end of the second platform frame is connected to the transverse sleeve assembly 19.

[0075] The transverse sleeve assembly 19 includes a movable sleeve and a movable locking screw 191 connected to the movable sleeve. The movable locking screw 191 passes through the movable sleeve and is connected to the first threaded secondary support 17.

[0076] The winch 14 is connected to the lower side of the first base frame 121;

[0077] The mounting wheel assembly includes a left support wheel assembly located at the lower left end of the first top frame and a right support wheel assembly located at the lower right end of the first top frame.

[0078] The wire tensioning assembly 16 includes a tensioning main rope, a tensioning adapter frame, a first tensioning auxiliary rope, and a second tensioning auxiliary rope. The winch 14 is connected to the tensioning adapter frame via the tensioning main rope. The tensioning adapter frame is connected to the first structural reinforcing rod 134 via the first tensioning auxiliary rope. The tensioning adapter frame is connected to the second structural reinforcing rod 135 via the second tensioning auxiliary rope.

[0079] The hydraulic jack assembly 15 is connected to the first base frame. There are four sets of hydraulic jack assemblies 15, which are respectively connected to the four corners.

[0080] Example 3

[0081] Based on Example 2, this example further discloses:

[0082] The guiding assist device 3 also includes a guiding support base 33, with a plurality of first guiding rods 34 connected to the upper front part of the guiding support base 33 and a plurality of second guiding rods 35 connected to the upper rear part of the guiding support base 33.

[0083] The protective mesh frame 31 is conical in shape and includes a first protective steel ring 311 and a second protective steel plate 312. The radius of the first protective steel ring 311 is larger than the radius of the second protective steel plate 312. Multiple third protective steel pipes 313 are connected between the first protective steel ring 311 and the second protective steel plate 312. A first guide rod 34 is connected to the first protective steel ring 311, and a second guide rod is connected to the second protective steel plate 312. A steel strand through hole is provided in the middle of the second protective steel plate 312.

[0084] The steel strand booster 32 includes a boosting active concave wheel, a boosting driven concave wheel, and a boosting motor. The boosting active concave wheel and the boosting driven concave wheel are connected to the front end of the first protective steel ring through a first wheel body support frame. A boosting active gear is connected to the outside of the boosting active concave wheel, and a boosting driven gear is connected to the outside of the boosting driven concave wheel. The boosting active gear and the boosting driven gear mesh. The boosting motor is connected to the first wheel body support frame through a second wheel body support frame, and the boosting motor is connected to the boosting active gear through a transmission shaft assembly.

[0085] Example 4

[0086] Based on Example 2, this example further discloses:

[0087] The steel strand storage device 4 includes a storage base frame 41, a steel strand positioning cage 42, and a storage support frame 43 installed on the storage base frame 41. The storage support frame 43 includes a storage rear support 44 and two sets of storage upper supports 45 vertically connected to the upper front end of the storage rear support 44.

[0088] The length of the storage base frame 41 is greater than that of the storage upper support frame 45. The upper end of the storage base frame 41 is provided with four first storage positioning slide rails 46, and the lower end of the storage upper support frame 45 is provided with a second storage limiting slide rail 47. Each steel strand positioning cage 42 is adapted to two first storage positioning slide rails 46.

[0089] When installing the steel strand coil, use a crane to first lift the steel strand coil and place it in the steel strand positioning cage. Then, lift two steel strand positioning cages and place them on the first storage positioning slide rail in front of the storage support. Then, push the steel strand positioning cage. The upper end face of the steel strand positioning cage has a cage body groove. After pushing the steel strand positioning cage, the second storage limiting slide rail is inserted into the cage body groove. After the steel strand positioning cage is connected to the storage support 44, the cage body limiting pin is installed on the first storage positioning slide rail at the front end of the steel strand positioning cage.

[0090] One end of the coil positioning push rod 5 is connected to the material storage rear support 44, and the other end of the coil positioning push rod 5 is connected to the push rod support plate 51; the coil positioning push rod 5 is connected to the steel strand coil in the steel strand positioning cage 42 through the push rod support plate 51.

[0091] The above-mentioned construction method for using a beam threading auxiliary system to thread beams during the construction of multiple precast beams has the following characteristics:

[0092] This construction method, through decentralized material loading using different equipment and subsequent integrated application, improves the efficiency of collaborative operations. It is applicable to the simultaneous construction of steel strands in the prestressed holes of multiple precast beams within a precast yard, thus enhancing overall construction efficiency. Furthermore, it is also suitable for the construction of steel strands in a single precast beam, ensuring versatility in construction methods.

[0093] The use of the new type of steel strand threading equipment 1 can improve the convenience of the entire equipment processing and the convenience of movement and adjustment. The vertical adjustment is more accurate, and through the moving track and its own sleeve, it can be easily moved with higher precision.

[0094] The prefabricated structure of the steel strand threading equipment makes it lighter and easier to move.

[0095] Prefabricated positioning rails are used to support and move steel strand threading equipment, guiding aids, and steel strand storage equipment. They ensure the stability of the rearward force support during steel bar transmission and facilitate subsequent movement, allowing for easy left-right movement without the need for traction vehicles or other large equipment. Furthermore, the prefabricated structure makes disassembly and assembly very convenient.

[0096] The use of guiding assistance equipment increases the safety of wire strand threading, effectively protecting construction workers from being injured by the snapping of the wire strands, and also increases the convenience of the initial construction process.

[0097] By setting up a new type of steel strand storage equipment, two steel strand coils can be stored at a time, which improves the efficiency of construction and makes it easier to replace the steel strand coils. The cage and the main frame can be separated, making it easier to disassemble and transport later. The whole equipment is a prefabricated structure, and if the cage or the support frame is damaged, it can be easily replaced. The whole equipment can be reused.

[0098] When threading steel strands into the prestressed holes of multiple precast beams in a precast processing plant, as long as the construction equipment is prepared in advance, the threading construction of the next precast beam can be carried out quickly after the construction of one prestressed beam is completed.

[0099] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0100] For any parts not mentioned in this invention, existing technologies can be used or referenced.

[0101] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A construction method for threading multiple precast beams using a threading auxiliary system, characterized in that, The strand threading auxiliary system includes a strand threading device, a prefabricated positioning rail, a guiding assist device, and a strand storage device. The prefabricated positioning rail includes multiple rail assembly rods, and a first movable seat, a second movable seat, and a third movable seat are provided on the prefabricated positioning rail. The strand threading device includes a first threading main support frame, a first movable platform, and a winch. A hydraulic jack assembly is connected to the end foot of the first threading main support frame. The hydraulic jack assembly is used for fine adjustment of the height of the strand threading device. The winch is connected to the lower part of the first main support frame for threading the wire. A wire tensioning assembly is connected to the winch. A hook-up wheel assembly is connected to the first main support frame for threading the wire. One end of the wire tensioning assembly passes through the hook-up wheel assembly and is connected to the first moving platform. The first mobile platform is connected inside the first main support frame and can move up and down under the action of the wire tensioning assembly; The first mobile platform is provided with a first threading support frame and a second mobile platform, and the second mobile platform is connected to the first threading support frame through a transverse sleeve assembly; the threading machine is provided on the first mobile platform; The guiding assist device also includes a guiding support base frame, with multiple first guiding rods connected to the upper front part of the guiding support base frame and multiple second guiding rods connected to the upper rear part of the guiding support base frame; The protective net frame is conical in shape and includes a first protective steel ring and a second protective steel plate. The radius of the first protective steel ring is larger than the radius of the second protective steel plate. Multiple third protective steel pipes are connected between the first protective steel ring and the second protective steel plate. A first guide rod is connected to the first protective steel ring, and a second guide rod is connected to the second protective steel plate. A steel strand through hole is provided in the middle of the second protective steel plate. The construction method specifically includes the following steps; S1, the first movable seat, the second movable seat and the third movable seat are moved to the storage warehouse, and the steel strand threading equipment, the guiding assist equipment and the steel strand storage equipment are respectively installed on the upper end of the first movable seat, the second movable seat and the third movable seat; S2, hoist the steel strand coil into the steel strand storage equipment. Each steel strand storage equipment is equipped with two sets of steel strand coils. The coil positioning push rod is used inside the steel strand storage equipment to press and position the steel strand coil from the rear. S3: Use a tractor to move three mobile seats to the construction site; determine the length of the assembled positioning rails based on the length of multiple precast beams to be constructed, and then assemble the rail assembly rods to assemble a total of six sets of prefabricated positioning rails, with each mobile seat adapted to two sets of rails. S4. Based on the location of the perforation on the precast beam, determine the position of the strand threading machine in the strand threading equipment. Adjust the guiding assist device and the strand storage device to be located behind the strand threading equipment. The guiding assist device includes a protective mesh frame and a strand booster. Pull out the strands from the strand storage device and first introduce them into the protective mesh frame, and then into the strand booster. At this time, a portion of the strands is gradually pulled out, and this portion is located between the strand threading equipment and the guiding assist device. S5. Clean the area around the prestressed duct on the precast beam. Align the wire threading machine with the prestressed duct and introduce the steel strand from the entrance of the wire threading machine. Lead the wire out from the exit of the wire threading machine. Install the head positioning device at the head of the steel strand. Turn off the wire threading booster. Then start the wire threading machine to allow the steel strand to enter the prestressed duct until it reaches the other end of the prestressed duct. S6. Use the steel strand cutting hydraulic pliers attached to the guide assist device to cut the steel strand, thereby completing the threading of a steel strand. If there are other prestressed ducts on the same prestressed beam, repeat step S5 to complete the threading of steel strands in other prestressed ducts. S7. Without disassembling the entire equipment, push the steel strand threading device, guiding assist device, and steel strand storage device to the target location on the prefabricated positioning track. Repeat steps S4-S6 to complete the subsequent threading of steel strands on the prestressed beam.

2. The construction method for using a beam-threading auxiliary system during the construction of multiple precast beams according to claim 1, characterized in that, The assembled positioning track includes a straight track plate, an arc track plate, and a ramp plate. A first straight track plate positioning groove is provided on the left end face of the straight track plate, and a first straight track plate positioning block is provided on the other end face of the straight track plate. A first arc-shaped plate positioning groove is provided on the left end face of the arc-shaped track plate, and a first arc-shaped plate positioning block is provided on the other end face of the arc-shaped track plate. The ramp plate is triangular in shape, and a first corner plate positioning groove and a first corner plate positioning insert are respectively provided on the two right-angled surfaces of the ramp plate.

3. The construction method for using a beam-threading auxiliary system during the construction of multiple precast beams according to claim 1, characterized in that, The first main support frame includes a first base frame, four first vertical support rods connected to the first base frame, and a first top frame connected to the four first vertical support rods. The first vertical support rods are respectively installed on the four end corners of the first base frame by positioning screws. The first mobile platform includes a first platform base support, a first platform vertical frame connected to the first platform base support, and a first platform lifting and positioning tube provided at the four corners of the first platform vertical frame, with the first platform lifting and positioning tube sleeved on the first vertical support rod. The first platform vertical frame has a first structural reinforcing rod and a second structural reinforcing rod respectively installed in the left and right parts. There are two of each type of first and second structural reinforcing rod. The first through-beam secondary support is installed between adjacent first and second structural reinforcing rods.

4. The construction method for using a threading auxiliary system to thread multiple precast beams during construction according to claim 3, characterized in that, The second mobile platform includes a second platform support plate, the lower end of which is connected to a second platform pulley assembly, and the second platform support plate is connected to the first platform bottom support through the second platform pulley assembly; The upper end of the second platform support plate is connected to the second platform frame. The threading machine is set on the second platform support plate inside the second platform frame. The end of the second platform frame is connected to the transverse sleeve assembly. The transverse sleeve assembly includes a movable sleeve and a movable locking screw connected to the movable sleeve. The movable locking screw passes through the movable sleeve and connects to the first threaded auxiliary support.

5. The construction method for using a threading auxiliary system to thread multiple precast beams during construction according to claim 3, characterized in that, The winch is connected to the lower side of the first base frame; The mounting wheel assembly includes a left support wheel assembly located at the lower left end of the first top frame and a right support wheel assembly located at the lower right end of the first top frame. The wire tensioning assembly includes a tensioning main rope, a tensioning adapter, a first tensioning auxiliary rope, and a second tensioning auxiliary rope. The winch is connected to the tensioning adapter via the tensioning main rope. The tensioning adapter is connected to the first structural reinforcing rod via the first tensioning auxiliary rope. The tensioning adapter is connected to the second structural reinforcing rod via the second tensioning auxiliary rope. The hydraulic jack assembly is connected to the first base frame. There are four sets of hydraulic jack assemblies, which are respectively connected to the four corners.

6. The construction method for using a beam-threading auxiliary system during the construction of multiple precast beams according to claim 1, characterized in that, The steel strand storage equipment includes a storage base frame, a steel strand positioning cage, and a storage support frame set on the storage base frame; The storage support frame includes a rear storage support and two sets of upper storage supports that are vertically connected to the upper front end of the rear storage support. The length of the storage base frame is greater than that of the storage upper support frame. The upper end of the storage base frame is equipped with four first storage positioning slide rails, and the lower end of the storage upper support frame is equipped with a second storage limiting slide rail. Each steel strand positioning cage is adapted to two first storage positioning slide rails. When installing the steel strand coil, use a crane to first lift the steel strand coil and place it in the steel strand positioning cage. Then, lift two steel strand positioning cages and place them on the first storage positioning slide rail in front of the storage support. Then, push the steel strand positioning cage. The upper end face of the steel strand positioning cage has a cage body groove. After pushing the steel strand positioning cage, the second storage limiting slide rail is inserted into the cage body groove. After the steel strand positioning cage is connected to the storage support, the cage body limiting pin is installed on the first storage positioning slide rail at the front end of the steel strand positioning cage.

7. The construction method for using a beam-threading auxiliary system during the construction of multiple precast beams according to claim 6, characterized in that, One end of the coil positioning push rod is connected to the storage support, and the other end of the coil positioning push rod is connected to the push rod support plate; the coil positioning push rod is connected to the steel strand coil in the steel strand positioning cage through the push rod support plate.

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