A precise and fast anti-collision hoisting method for ramp steel box beams connected to existing elevated roads

Abstract

The present invention discloses a method for accurate and fast anti-collision hoisting of ramp steel box girders connected to existing elevated roads, which includes lengthening and replacing the existing cross beams of the highway; building all support frames between two adjacent lengthened cross beams, and laying transportation tracks on the support frames; hoisting each transportation platform vehicle onto the transportation track corresponding to the first section, and then hoisting each section of the steel box girder in turn and placing it on the transportation platform vehicle; transporting each section of the steel box girder to the construction position along the transportation track in turn; welding between two adjacent steel box girders; driving the entire section down until both ends of the section are respectively pressed against the adjacent lengthened cross beams; transporting each transportation platform vehicle to the main track between the next two adjacent lengthened cross beams; removing the anti-collision wall, and building the anti-collision wall on the side of the ramp. The present application has the effect of improving the overall construction progress while reducing the damage to the original highway.

Description

Technical Field

[0001] The invention relates to the field of highway construction, and in particular to a method for accurately and quickly anti-collision hoisting a ramp steel box girder connected to an existing elevated road. Background Art

[0002] At present, with the continuous development of society, highways are being built in more and more areas. When the highway reaches each area, there will be ramps for getting on and off the highway. Therefore, ramps are an important part of the highway.

[0003] Existing highway ramps are designed to be long enough to allow vehicles to merge in or out with sufficient distance. However, the construction of this section now involves first building a support, then hoisting the steel box girder onto the support, and then splicing it with the adjacent steel box girder.

[0004] Regarding the above-mentioned related technologies, since the steel box girder needs to be connected to the original highway, it is easy for the steel box girder to collide with the original highway during the splicing process, thereby causing damage to the original highway; if a very slow translation method is used to approach, it will affect the overall construction progress. Summary of the invention

[0005] In order to improve the overall construction progress while reducing damage to the original expressway, the present application provides a precise, rapid and anti-collision hoisting method for a ramp steel box girder connected to an existing elevated road.

[0006] This application provides a method for accurate, rapid and anti-collision hoisting of a ramp steel box girder connected to an existing elevated road, which adopts the following technical solutions:

[0007] A method for accurately and quickly lifting a steel box girder for a ramp connected to an existing elevated road to prevent collision, the method comprising:

[0008] Step 1: Lengthen and replace the existing crossbeams of the highway;

[0009] Step 2: Build all the support frames between two adjacent extended beams, and lay the transport track on the support frames;

[0010] Step 3: Lift each transport platform vehicle onto the transport track corresponding to the first section, and then lift each section of the steel box girder in turn and place it on the transport platform vehicle;

[0011] Step 4: transporting each section of the steel box girder to the construction location along the transport track in sequence;

[0012] Step 5: welding two adjacent steel box girders;

[0013] Step 6: Drive the entire section down until both ends of the section are pressed against the adjacent extended beams;

[0014] Step 7: transport each of the transport platform vehicles to the main track between the next two adjacent extended beams;

[0015] Step 8: Repeat steps 3 to 7 to complete the construction of the entire ramp;

[0016] Step 9: Remove the crash barrier and build a crash barrier on the side of the ramp.

[0017] By adopting the above technical solution, the steel box girder is directly placed on the transport platform vehicle, and each section of the steel box girder is accurately transported to the construction location through the guidance of the transport track and the transportation method of the transport platform vehicle; then the two adjacent sections of the steel box girder are welded; finally, the entire section of the steel box girder is lowered onto the extended beam; this construction method can reduce the damage to the original highway and improve the overall construction progress; after completing the construction of a section of steel box girder, each transport platform vehicle is directly transported to the main track between the next two adjacent extended beams for reuse, and the support frame and transport track of the next section can be laid during the completion of the previous section, thereby further greatly improving the construction efficiency.

[0018] Preferably, the transport track includes a main track and a branch track, the main track extends in the extension direction of the highway; the branch track is perpendicular to the main track;

[0019] In step 4, the method of transporting each section of steel box girder to the construction location along the transport track in sequence includes:

[0020] Transporting the steel box girders in sequence along the main track to the branch track corresponding to the laying position of each section of the steel box girder;

[0021] The steel box girder is transported along the branch track and reaches the construction position when it abuts against the anti-collision wall.

[0022] By adopting the above technical scheme, in order to reduce the collision between the steel box girder and the original highway when hoisting it onto the transport platform vehicle, there is a distance between the steel box girder and the highway when hoisting it onto the transport platform vehicle; therefore, it is first transported along the main track to the branch track corresponding to the laying position of each section of the steel box girder, and then the steel box girder is transported along the branch track until it abuts the crash barrier and reaches the construction position. Since the crash barrier will be demolished in a short period of time during construction and the crash barrier is flush with the original highway in the vertical direction, there is no need to worry about damage to the crash barrier, and the guidance for subsequent lowering can be achieved on the existing structure.

[0023] Preferably, the transport platform vehicle comprises: a vehicle body, a transverse platform and a supporting platform, the vehicle body is provided with a sliding groove connected to the support rail, the transverse platform is slidably mounted on the vehicle body toward or away from the original highway through the sliding groove, the supporting platform is arranged directly above the transverse platform, and the supporting platform is movably mounted on the transverse platform in a vertical direction; the transport platform vehicle further comprises: a first driving member for driving the transverse platform to slide and a second driving member for driving the supporting platform to slide;

[0024] The method for transporting the steel box girder along the branch track comprises:

[0025] The first driving member drives the traverse platform to slide into the support track;

[0026] In step six, the method of driving the entire section down until both ends of the section are pressed against adjacent extended beams includes:

[0027] The supporting platform of each transport platform vehicle is driven to move vertically downward by the second driving member.

[0028] By adopting the above technical solution, after the steel box girder is transported along the main track to the branch track position corresponding to the laying position of each section of the steel box girder in sequence, the transverse platform is driven by the first driving member to move in the direction close to the original highway; and because when the transverse platform moves into the branch track, the transverse platform is perpendicular to the forward direction of the vehicle body, so the relative slippage between the two adjacent sections during the subsequent welding process can be reduced.

[0029] Preferably, a limiting groove is provided on a side of the supporting platform away from the transverse platform, and a limiting block matching the limiting groove is preset at the bottom of the steel box beam;

[0030] In step 3, the method of hoisting each section of steel box beam and placing it on the transport platform vehicle includes:

[0031] When placing each section of the steel box girder on the transport platform vehicle, the limit blocks are inserted into the limit grooves.

[0032] By adopting the above technical solution, when the steel box girder is hoisted onto the transport platform vehicle, the limit block is inserted into the limit groove, thereby improving the stability of the steel box girder during transportation, and also ensuring the position accuracy of the steel box girder when hoisted onto the transport platform vehicle.

[0033] Preferably, the cross-sections of the limiting block and the limiting groove are both arc-shaped.

[0034] By adopting the above technical solution, not only can the smoothness of lifting the steel box girder onto the transport platform vehicle be improved, but also the stability of the steel box girder can be accurately positioned when the steel box girder contacts the crash wall.

[0035] Preferably, the wheels on both sides of the vehicle body are arranged in a one-to-one correspondence; the support frame is located at the end position of the main track and is provided with an unloading platform on the side away from the highway; the main track is provided with a plurality of notches corresponding to the arrangement positions of the wheels of the vehicle body at the position corresponding to the unloading platform, and the support frame is provided with a translation rail at the position corresponding to the notch, and the translation rail is slidably installed on the main track and the unloading platform in a direction perpendicular to the extension direction of the main track; the translation rail is driven to slide by a driving component;

[0036] The method for transporting each of the transport platform vehicles to the main track between the next two adjacent extended beams comprises:

[0037] Moving the transport platform vehicle until the wheels of the vehicle body are on corresponding translation rails;

[0038] The driving assembly drives each of the translation rails to slide onto the unloading platform, so that the transport platform vehicle leaves the area directly below the steel box beam;

[0039] The transport platform vehicle is hoisted onto the main track between the next two adjacent extended beams.

[0040] By adopting the above technical solution, after the lowering of the entire steel box girder is completed, since the transport platform vehicle is still located directly below the steel box girder, the transport platform vehicles are moved one by one along the length direction of the main track until the wheels fall on each translation rail one by one; then the driving assembly drives the translation rail to slide to the unloading platform, so that the transport platform vehicle can leave directly below the steel box girder; then the entire transport platform vehicle is lifted to the main track between the next two adjacent extended beams by hoisting; the above method improves the overall construction efficiency and greatly shortens the construction period.

[0041] Preferably, the one-to-one corresponding translation rails form a group, and the translation rails in the same group are connected by a sliding plate, and the sliding plate is slidably installed on the main track and the unloading platform; the driving component comprises: a unloading reel, a reset reel and a plurality of reeling ropes, and each of the sliding plates is correspondingly provided with the unloading reel and the reset reel; the unloading reel is installed on the side of the unloading platform away from the supporting frame, and the reset reel is installed on the side of the supporting frame away from the unloading platform; each of the unloading reel and each of the reset reel reels a reeling rope, and the corresponding reeling rope on the unloading reel and the reeling rope on the reset reel are respectively connected to the two ends of the sliding plate;

[0042] The method of driving each of the translation rails to slide onto the unloading platform by the driving assembly so that the transport platform vehicle leaves the area directly below the steel box beam comprises:

[0043] Driving the unloading reel to reel, driving the resetting reel to unreel, so as to drive each of the translation rails to slide onto the unloading platform;

[0044] After the lifting of the transport platform vehicle is completed, the unloading reel is driven to unwind, and the resetting reel is driven to rewind, so as to drive each of the translation rails to reset.

[0045] By adopting the above technical solution, when it is necessary to drive the translation rail to move to the unloading platform, the reeling rope is reeled by the unloading reeling machine, and the reeling rope is unreeled by the resetting reeling machine at the same time, so that the sliding plate can be pulled to slide to the unloading platform, that is, the entire transport platform vehicle is slid to the unloading platform; when it is necessary to reset the translation rail, the reeling rope is unreeled by the unloading reeling machine, and the reeling rope is reeled by the resetting reeling machine at the same time, and the position adjustment of the translation rail can be completed; the above method has high stability and efficiency in adjusting the position of the translation rail.

[0046] Preferably, it also includes: a dovetail slide rail, both ends of which extend to the support frame and the unloading platform respectively, and the sliding plate is provided with a dovetail slide groove adapted to the dovetail slide rail.

[0047] By adopting the above technical solution, the sliding plate can slide stably and the derailment situation can be reduced.

[0048] Preferably, the sliding plate is provided with a pull rope at both sides corresponding to the translation rail, one end of the pull rope is fixedly mounted on the translation rail, and the other end is provided with a hook, and the wheel of the vehicle body is provided with a hook groove for the hook to buckle into;

[0049] After the transport platform vehicle is moved until the wheels of the vehicle body are on the corresponding translation rails, and before the driving assembly drives each translation rail to slide onto the unloading platform, the method further includes:

[0050] Buckle the hook on the pull rope into the hook groove to limit the position of the transport platform vehicle.

[0051] By adopting the above technical solution, before driving the sliding plate to move to the unloading platform, the hook is first buckled into the hook groove to limit the wheel, thereby reducing the derailment of the transport platform vehicle during the process of translating the transport platform vehicle to the unloading platform and improving the overall safety.

[0052] Preferably, the main track is provided with buckle grooves at positions close to the notch and located on both sides of the main track; the hook of the pull rope located on the sliding plate is hooked on the main track through the buckle grooves.

[0053] By adopting the above technical solution, when the translation rail is flush with the main rail, the hooks are buckled into the corresponding buckle grooves on both sides of the main rail, so that not only the positioning rope can be placed, but also the translation rail can be limited in the sliding direction of the sliding plate.

[0054] In summary, the present application includes at least one of the following beneficial technical effects:

[0055] 1. It can reduce the damage to the original highway and improve the overall construction progress. After completing the construction of a section of steel box beam, each transport platform vehicle can be directly transported to the main track between the next two adjacent extended beams for reuse. During the completion of the previous section, the support frame and transport track of the next section can be laid, thus further greatly improving the construction efficiency.

[0056] 2. After the steel box beams are transported to the branch track positions corresponding to the laying positions of each section of the steel box beam along the main track, the first driving member drives the traverse table to move in the direction close to the original highway; and because the traverse table is perpendicular to the forward direction of the vehicle body after it moves into the branch track, the relative slip between the two adjacent sections in the subsequent welding process can be reduced;

[0057] 3. It can not only improve the smoothness of lifting the steel box girder onto the transport platform, but also ensure the stability and accurate position of the steel box girder when it comes into contact with the anti-collision wall;

[0058] 4. Each transport platform vehicle is moved along the length direction of the main track until the wheels fall on each translation rail one by one; then the translation rail is driven to slide to the unloading platform by the driving assembly, so that the transport platform vehicle can leave the bottom of the steel box beam; then the entire transport platform vehicle is hoisted to the main track between the next two adjacent extended beams; the above method improves the overall construction efficiency and greatly shortens the construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 It is a flow chart of a method for accurate, rapid and anti-collision lifting of a ramp steel box girder connected to an existing elevated road according to an embodiment of the present application.

[0060] Figure 2 It is a schematic diagram of the anti-collision hoisting structure of the method for precise and rapid anti-collision hoisting of a ramp steel box girder connected to an existing elevated road according to an embodiment of the present application.

[0061] Figure 3 It is a structural schematic diagram of a transport platform vehicle installed on a support frame according to an embodiment of the present application for a method for accurately and quickly lifting a steel box girder of an existing elevated ramp with anti-collision.

[0062] Figure 4It is a structural cross-sectional view of a transport platform vehicle installed on a support frame according to an embodiment of the present application in a method for accurately and quickly lifting a steel box girder of an existing elevated ramp with anti-collision.

[0063] Figure 5 It is a structural schematic diagram of a transport platform vehicle for a method of accurately and rapidly anti-collisionally lifting a steel box girder of an existing elevated ramp according to an embodiment of the present application.

[0064] Figure 6 It is a structural cross-sectional view of unloading a transport platform vehicle in a method for accurately and rapidly anti-collision hoisting a ramp steel box girder connected to an existing elevated road in an embodiment of the present application.

[0065] Figure 7 It is a structural schematic diagram of unloading a transport platform vehicle in a method for accurately and rapidly anti-collision hoisting a ramp steel box girder connected to an existing elevated road in an embodiment of the present application.

[0066] Figure 8 yes Figure 7 A partial enlarged view of middle A.

[0067] Description of reference numerals:

[0068] 1. Support frame; 2. Transport track; 21. Main track; 211. Notch; 212. Translation track; 213. Pull rope; 214. Hook; 215. Buckle slot; 22. Support track; 3. Transport platform vehicle; 31. Vehicle body; 311. Hook slot; 32. Transverse platform; 33. Support platform; 331. Limiting slot; 34. First driving member; 35. Second driving member; 4. Unloading platform; 41. Dovetail slide rail; 5. Sliding plate; 51. Dovetail slide; 6. Driving assembly; 61. Unloading winder; 62. Resetting winder; 63. Winding rope; 101. Highway; 102. Steel box girder; 103. Anti-collision wall; 104. Limiting block. DETAILED DESCRIPTION

[0069] The following is combined with Figure 1-8 This application is described in further detail.

[0070] The present application embodiment discloses a method for accurately and quickly lifting and anti-collision steel box girders for ramps connected to existing elevated roads. Figure 1 , the hoisting method includes the following steps:

[0071] S01: Lengthen and replace the existing cross beams of Highway 101;

[0072] S02: Build all the support frames 1 between two adjacent extended beams, and lay the transport track 2 on the support frames 1; wherein the transport track 2 includes a pair of main tracks 21 and a pair of branch tracks 22, the main tracks 21 extend in the extension direction of the highway 101, and the branch tracks 22 are perpendicular to the main tracks 21, and extend in the direction close to the highway 101;

[0073] S03: hoist each transport platform vehicle 3 onto the transport track 2 corresponding to the first section, and then hoist each section of the steel box girder 102 in turn and place it on the transport platform vehicle 3; the steel box girder 102 between each two adjacent extended beams is a section, and each section of the steel box girder 102 is formed by splicing multiple sections of the steel box girder 102; the number of transport platform vehicles 3 here is consistent with the number of sections of the same section of the steel box girder 102;

[0074] S04: transporting each section of the steel box girder 102 in sequence along the main track 21 to the branch track 22 corresponding to the laying position of each section of the steel box girder 102;

[0075] S05: The steel box girder 102 is transported along the branch track 22 and abuts against the anti-collision wall 103 to reach the construction position;

[0076] S06: welding two adjacent steel box girders 102;

[0077] S07: driving the entire section of the steel box beam 102 downward until both ends of the section are pressed against adjacent extended cross beams;

[0078] S08: transporting each transport platform vehicle 3 to the main track 21 between the next two adjacent extended beams;

[0079] S09: Repeat S03-S07 to complete the construction of the entire ramp;

[0080] S10: demolish the crash barrier 103 and build a crash barrier 103 on the side of the ramp.

[0081] Reference Figure 2 , Figure 3 and Figure 4 The transport platform vehicle 3 includes a vehicle body 31, a transverse platform 32, a supporting platform 33, a first driving member 34 and a second driving member 35. The wheels on both sides of the vehicle body 31 are arranged in a one-to-one correspondence. The wheels of the vehicle body 31 are rollingly mounted on the main track 21. A sliding groove connected to the branch track 22 is opened on the top of the vehicle body 31; rollers are installed on the opposite sides of the transverse platform 32, and the transverse platform 32 is slidingly mounted on the vehicle body 31 through the sliding groove toward or away from the original highway 101; the first driving member 34 is a hydraulic cylinder, and the first driving member 34 is fixedly mounted on the side of the vehicle body 31 away from the highway 101. The piston rod of the first driving member 34 is retracted in the sliding direction of the transverse platform 32, and the piston rod of the first driving member 34 is fixedly mounted on the transverse platform 32, thereby driving the transverse platform 32 to slide into the branch track 22.

[0082] Reference Figure 4 and Figure 5The supporting platform 33 is parallel to the transverse platform 32, the supporting platform 33 is located directly above the transverse platform 32, and is installed on the transverse platform 32 when the supporting platform 33 moves in the vertical direction; the second driving member 35 is a jack, the second driving member 35 is fixedly installed on the transverse platform 32, and the piston rod of the second driving member 35 is fixedly installed on the supporting platform 33; therefore, when the steel box girder 102 is placed on the supporting platform 33, the steel box girder 102 can be driven to move by driving the supporting platform 33 to move.

[0083] Therefore, the specific method of transporting the steel box girder 102 along the branch track 22 includes:

[0084] The first driving member 34 drives the traverse platform 32 to slide into the branch rail 22 .

[0085] In S07, the method of driving the entire section of the steel box beam 102 downward until both ends of the section are respectively pressed against the adjacent extended cross beams specifically includes:

[0086] The supporting platform 33 of each transport platform vehicle 3 is driven to move vertically downward by the second driving member 35 until both ends of the entire steel box beam 102 are pressed against the adjacent extended cross beam.

[0087] Reference Figure 5 A plurality of limit grooves 331 are evenly opened on the side of the supporting platform 33 away from the transverse platform 32, and a plurality of limit blocks 104 are preset at the bottom of the steel box girder 102. The number of the limit blocks 104 is consistent with the number of the limit grooves 331 and corresponds one to one. The cross-sections of the limit blocks 104 and the limit grooves 331 are both arc-shaped; therefore, when the steel box girder 102 is placed on the supporting platform 33, the limit blocks 104 are inserted into the limit grooves 331, so that the position of the steel box girder 102 is more accurate.

[0088] Therefore, the method of hoisting each section of steel box beam 102 and placing it on the transport platform vehicle 3 includes:

[0089] Each section of the steel box beam 102 is placed on the transport platform vehicle 3 and the limiting block 104 is inserted into the limiting groove 331 .

[0090] Reference Figure 6 , Figure 7 and Figure 8The support frame 1 is provided with an unloading platform 4 at the end position of the main rail 21 and away from the highway 101; each main rail 21 is provided with a pair of notches 211 at the position corresponding to the unloading platform 4, and the notches 211 on the two main rails 21 correspond to the wheel arrangement positions on the vehicle body 31 one by one, and the support frame 1 is provided with a translation rail 212 at the position corresponding to the notch 211; the support frame 1 and the unloading platform 4 are provided with a dovetail slide rail 41, and the dovetail slide rail 41 is perpendicular to the The main track 21 extends in the length direction, and the two ends of the dovetail slide rail 41 extend to the support frame 1 and the unloading platform 4 respectively; the corresponding translation rails 212 on the two main tracks 21 form a pair, and a sliding plate 5 is provided directly below the same pair of translation rails 212. The translation rail 212 is fixedly installed on the sliding plate 5, and a dovetail groove 51 is provided at the bottom of the sliding plate 5. The sliding plate 5 is slidingly installed on the dovetail slide rail 41 through the dovetail groove 51; the sliding plate 5 is driven to slide by the driving component 6.

[0091] Reference Figure 6 and Figure 7 The driving component 6 includes a unloading reel 61, a reset reel 62 and a plurality of reeling ropes 63. Each sliding plate 5 is provided with a corresponding unloading reel 61 and a reset reel 62; the unloading reel 61 is fixedly installed on the side of the unloading platform 4 away from the supporting frame 1, and the reset reel 62 is fixedly installed on the side of the supporting frame 1 away from the unloading platform 4; a reeling rope 63 is arranged between each unloading reel 61 and the sliding plate 5, and between each reset reel 62 and the sliding plate 5. The reeling rope 63 is reeled on the unloading reel 61 or the reset reel 62, and the corresponding reeling rope 63 on the unloading reel 61 and the reeling rope 63 on the reset reel 62 are respectively fixedly connected to the two ends of the sliding plate 5, so that the unloading reel 61 and the reset reel 62 can be controlled to reel and unreel, thereby driving the sliding plate 5 to slide.

[0092] Therefore, in S08, the method of transporting each transport platform vehicle 3 to the main track 21 between the next two adjacent extended beams includes:

[0093] Move the transport platform vehicle 3 until the wheels of the vehicle body 31 are on the corresponding translation rails 212;

[0094] The unloading reel 61 is driven to reel, and the resetting reel 62 is driven to unreel, so as to drive each translation rail 212 to slide onto the unloading platform 4, so that the transport platform vehicle 3 leaves the bottom of the steel box beam 102;

[0095] The transport platform vehicle 3 is hoisted onto the main track 21 between the next two adjacent extended beams;

[0096] After the transport platform vehicle 3 is hoisted, the unloading reel 61 is driven to unwind, and the resetting reel 62 is driven to rewind, so as to drive each translation rail 212 to reset.

[0097] Reference Figure 7 and Figure 8 A pair of pull ropes 213 are provided on both sides of the sliding plate 5 corresponding to the translation rail 212, one end of the pull rope 213 is fixedly installed on the translation rail 212, and the other end is fixedly installed with a hook 214, and hook grooves 311 are opened on both sides of the wheels of the vehicle body 31, and the hooks 214 are buckled to the wheels of the vehicle body 31 through the hook grooves 311; therefore, after the transport platform vehicle 3 is moved to the point where the wheels of the vehicle body 31 are on the corresponding translation rail 212, before driving the unloading winder 61 to wind up and driving the reset winder 62 to unwind, so as to drive each translation rail 212 to slide onto the unloading platform 4, the method also includes buckling the hook 214 on the pull rope 213 into the hook groove 311 to limit the transport platform vehicle 3.

[0098] The main track 21 is provided with buckle grooves 215 near the notch 211 and on both sides of the main track 21 . Two pairs of buckle grooves 215 corresponding to the same notch 211 are located on both sides of the main track 21 , respectively; thereby limiting the sliding direction of the translation rail 212 in the sliding plate 5 .

[0099] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for accurate and rapid anti-collision hoisting of a ramp steel box girder connected to an existing elevated road, characterized in that: The hoisting method comprises: Step 1: lengthen and replace the existing cross beams of the expressway (101); Step 2: constructing all the support frames (1) between two adjacent extended beams, and laying the transport track (2) on the support frames (1); Step 3: hoist each transport platform vehicle (3) onto the transport track (2) corresponding to the first section, and then hoist each section of the steel box girder (102) in turn and place it on the transport platform vehicle (3); Step 4: transporting each section of the steel box beam (102) to the construction location along the transport track (2) in sequence; Step 5: welding two adjacent steel box girders (102); Step 6: driving the entire section of the steel box beam (102) downward until both ends of the section are pressed against adjacent extended cross beams; Step 7: transport each of the transport platform vehicles (3) to the main track (21) between the next two adjacent extended beams; Step 8: Repeat steps 3 to 7 to complete the construction of the entire ramp; Step 9: demolish the crash barrier (103) and build a crash barrier (103) on the side of the ramp; The transport track (2) comprises a main track (21) and a branch track (22), wherein the main track (21) extends in the extension direction of the highway (101); and the branch track (22) is perpendicular to the main track (21); In step 4, the method of transporting each section of the steel box beam (102) to the construction location along the transport track (2) in sequence comprises: The steel box beam (102) is sequentially transported along the main track (21) to the branch track (22) corresponding to the laying position of each section of the steel box beam (102); The steel box beam (102) is transported along the branch track (22) and abuts against the anti-collision wall (103) to reach the construction position; The transport platform vehicle (3) comprises: a vehicle body (31), a transverse platform (32) and a supporting platform (33); the vehicle body (31) is provided with a sliding groove connected to the support track (22); the transverse platform (32) is slidably mounted on the vehicle body (31) in a direction close to or away from the original expressway (101) through the sliding groove; the supporting platform (33) is arranged directly above the transverse platform (32); the supporting platform (33) is movably mounted on the transverse platform (32) in a vertical direction; the transport platform vehicle (3) further comprises: a first driving member (34) for driving the transverse platform (32) to slide and a second driving member (35) for driving the supporting platform (33) to slide; The method for transporting the steel box girder (102) along the branch track (22) comprises: The first driving member (34) is used to drive the traverse platform (32) to slide into the support track (22); In step six, the method of driving the entire section down until both ends of the section are pressed against adjacent extended beams includes: The supporting platform (33) of each transport platform vehicle (3) is driven to move vertically downward by a second driving member (35).

2. According to claim 1, a method for accurate, rapid and anti-collision hoisting of a ramp steel box girder connected to an existing elevated road, characterized in that: A limiting groove (331) is provided on a side of the supporting platform (33) away from the transverse platform (32), and a limiting block (104) adapted to the limiting groove (331) is preset at the bottom of the steel box beam (102); In step 3, the method of hoisting each section of the steel box beam (102) and placing it on the transport platform vehicle (3) includes: Each section of the steel box beam (102) is placed on the transport platform vehicle (3) and the limiting block (104) is inserted into the limiting groove (331).

3. According to claim 2, a method for accurate, rapid and anti-collision hoisting of a ramp steel box girder connected to an existing elevated road is characterized in that: The cross sections of the limiting block (104) and the limiting groove (331) are both arc-shaped.

4. According to claim 1, a method for accurate, rapid and anti-collision hoisting of a ramp steel box girder connected to an existing elevated road, characterized in that: The wheels on both sides of the vehicle body (31) are arranged in a one-to-one correspondence; the support frame (1) is located at the end position of the main track (21) and is provided with an unloading platform (4) on the side away from the highway (101); the main track (21) is provided with a plurality of notches (211) corresponding to the arrangement positions of the wheels of the vehicle body (31) at the position corresponding to the unloading platform (4); the support frame (1) is provided with a translation rail (212) at the position corresponding to the notch (211); the translation rail (212) is slidably installed on the main track (21) and the unloading platform (4) in a direction perpendicular to the extension of the main track (21); the translation rail (212) is driven to slide by a driving component (6); The method for transporting each of the transport platform vehicles (3) to the main track (21) between the next two adjacent extended beams comprises: Moving the transport platform vehicle (3) until the wheels of the vehicle body (31) are on corresponding translation rails (212); The driving assembly (6) drives each of the translation rails (212) to slide onto the unloading platform (4), so that the transport platform vehicle (3) leaves the area directly below the steel box beam (102); The transport platform vehicle (3) is hoisted onto the main track (21) between the next two adjacent extended beams.

5. According to claim 4, a method for accurate, rapid and anti-collision hoisting of a ramp steel box girder connected to an existing elevated road is characterized in that: The one-to-one corresponding translation rails (212) form a group, and the translation rails (212) in the same group are connected by a sliding plate (5), and the sliding plate (5) is slidably installed on the main track (21) and the unloading platform (4); the driving component (6) includes: a unloading reel (61), a reset reel (62) and a plurality of reeling ropes (63), and each of the sliding plates (5) is correspondingly provided with the unloading reel (61) and the reset reel (62); the unloading reel (61 ) is installed on a side of the unloading platform (4) away from the supporting frame (1), and the resetting reel (62) is installed on a side of the supporting frame (1) away from the unloading platform (4); each of the unloading reel (61) and each of the resetting reel (62) reels a reeling rope (63), and the reeling rope (63) on the corresponding unloading reel (61) and the resetting reel (62) are respectively connected to the two ends of the sliding plate (5); The method of driving each of the translation rails (212) to slide onto the unloading platform (4) by the driving assembly (6) so that the transport platform vehicle (3) leaves the area directly below the steel box beam (102) comprises: Driving the unloading reel (61) to reel, and driving the resetting reel (62) to unreel, so as to drive each of the translation rails (212) to slide onto the unloading platform (4); After the lifting of the transport platform vehicle (3) is completed, the unloading reel (61) is driven to unwind, and the resetting reel (62) is driven to rewind, so as to drive each of the translation rails (212) to reset.

6. According to claim 5, a method for accurate, rapid and anti-collision hoisting of a ramp steel box girder connected to an existing elevated road is characterized in that: Also includes: A dovetail slide rail (41), the two ends of which extend to the support frame (1) and the unloading platform (4) respectively, and the sliding plate (5) is provided with a dovetail slide groove (51) adapted to the dovetail slide rail (41).

7. According to claim 5, a method for accurate, rapid and anti-collision hoisting of a ramp steel box girder connected to an existing elevated road is characterized in that: The sliding plate (5) is provided with pull ropes (213) at positions on both sides corresponding to the translation rail (212); one end of the pull rope (213) is fixedly mounted on the translation rail (212), and the other end is provided with a hook (214); the wheel of the vehicle body (31) is provided with a hook groove (311) for the hook (214) to be buckled into; After the transport platform vehicle (3) is moved until the wheels of the vehicle body (31) are on the corresponding translation rails (212), and before the driving assembly (6) drives each translation rail (212) to slide onto the unloading platform (4), the method further comprises: The hook (214) on the pull rope (213) is buckled into the hook groove (311) to limit the position of the transport platform vehicle (3).

8. According to claim 7, a method for accurate, rapid and anti-collision hoisting of a ramp steel box girder connected to an existing elevated road is characterized in that: The main track (21) is provided with buckle grooves (215) at positions close to the notch (211) and located on both sides of the main track (21); the hook (214) of the pull rope (213) located on the sliding plate (5) is hooked to the main track (21) through the buckle grooves (215).

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