Horizontal bridge erecting machine and its use method

Abstract

The present invention relates to a horizontally placed bridge erecting machine and a using method, including steps: assembling the horizontally placed bridge erecting machine, symmetrically and synchronously hoisting precast beams on both sides of the horizontally placed bridge erecting machine, longitudinally shifting the horizontally placed bridge erecting machine, and disassembling the horizontally placed bridge erecting machine. The beneficial effects of the present invention are as follows: Compared with the traditional process, the present invention broadens the width of the bridge erecting machine, so that four lifting trolleys can be arranged, while the traditional bridge erecting machine only has two lifting trolleys. Therefore, the present invention can synchronously erect two precast beams at one time, doubling the erection efficiency; and there is no need to set up a beam lifting station, nor to close the road for beam lifting. It can efficiently complete the precast beam erection operation while ensuring the smoothness of the road; replacing the high-low lifting, simplifying the lifting steps, and significantly improving the beam lifting efficiency when the length of the precast beam is restricted by the cap beam.

Description

Technical Field

[0001] The present invention belongs to the technical field of bridge erecting machines, and particularly relates to a horizontally placed bridge erecting machine and a using method thereof. Background Art

[0002] Currently, traditional bridge erecting machines generally use the method of feeding beams from the back for hoisting precast beams. However, this method requires setting up multiple beam lifting stations and transporting beams on the beams, with high safety risks, low utilization rate and high cost. Moreover, it generally requires closing the road to ensure the smooth implementation of beam hoisting, and the closed detour will greatly increase the traffic organization cost and restrict the construction efficiency. To solve the problems faced by feeding beams from the back, the existing technology has proposed the high-low hoisting construction process. As a precast beam hoisting process that can replace the method of feeding beams from the back, it overcomes the limitation of the length of the precast beam during hoisting by the cap beam and has been reported in many documents, such as "Bridge Erection Machine High-Low Method Beam Hoisting Construction Technology", "Research on Bridge Erection Machine High-Low Method Beam Hoisting Construction Technology", "Bridge Erection Machine 'High-Low Hoisting' Beam Hoisting Construction Technology in Yuhang Elevated Project", etc.; In addition, there are also publicly disclosed patents that have improved and optimized the high-low hoisting, such as CN113957793A A Construction Method for Prefabricated Box Girder Bracket in a Complex Urban Area, CN113931077A A Construction Method for Erecting a Bridge Erection Machine for Prefabricated Box Girder with Limited Construction Space, CN112520582B A High-Low Hoisting Automatic Electrical Control System and Control Method, etc.

[0003] However, in the specific implementation process of high-low hoisting, there is still a very important problem, that is, the hoisting process is cumbersome and time-consuming. Generally, it takes eighteen steps to complete the high-low hoisting operation of a precast beam, and the efficiency is relatively low.

[0004] Therefore, there is an urgent need to seek a brand-new bridge erecting machine and a using method thereof to overcome the practical problems faced by the current methods of feeding beams from the back and high-low hoisting construction process, improve the hoisting construction efficiency and reduce the cost. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a horizontally placed bridge erecting machine and a using method thereof.

[0006] The using method of this horizontally placed bridge erecting machine includes the following steps:

[0007] Step 1: Assemble the horizontally placed bridge erecting machine: Fix the long-leg gantry on the first cap beam and install the transverse cantilever, install the second longitudinal traveling mechanism between the second cap beam and the third cap beam, hoist and place the short-leg gantry and install the transverse cantilever; Hoist and fix the longitudinal truss beam and install the first longitudinal traveling mechanism, install the transverse truss system, and place the hoisting trolley to form a hoisting mechanism;

[0008] Step 2: Hoist the beams with the horizontally placed bridge girder erection machine in synchronization: Through the hoisting mechanism, symmetrically hoist the precast beams on both sides from the beam position to the beam position and lower the beams onto the capping beams; Repeat the hoisting until all the precast beams between the No. 1 capping beam and the No. 2 capping beam are hoisted.

[0009] Step 3: Horizontally displace the horizontally placed bridge girder erection machine longitudinally: Place the hoisting mechanism at the rear, and longitudinally move the horizontally placed bridge girder erection machine towards the No. 0 capping beam by extending and laying the second longitudinal traveling mechanism; Then move the hoisting mechanism to the new beam hoisting position to complete the hoisting of all the precast beams between the No. 1 capping beam and the No. 0 capping beam; Repeat the displacement and hoisting until all the erection operations of the precast beams are completed.

[0010] Step 4: Dismantle the horizontally placed bridge girder erection machine: In the reverse order of the assembly of the horizontally placed bridge girder erection machine, successively dismantle the hoisting trolley, the transverse truss system, the longitudinal truss beam, the short-leg portal frame and the transverse cantilever, the second longitudinal traveling mechanism, the long-leg portal frame and the transverse cantilever to complete the dismantling operation of the horizontally placed bridge girder erection machine.

[0011] Preferably, Step 1 is specifically as follows:

[0012] Step 1.1 Fix the long-leg portal frame on the No. 1 capping beam and fix the transverse cantilevers on both sides of the long-leg portal frame.

[0013] Step 1.2 Install the second longitudinal traveling mechanism on the precast beam that has been erected between the No. 2 capping beam and the No. 3 capping beam.

[0014] Step 1.3 Hoist and place the short-leg portal frames at both ends of the second longitudinal traveling mechanism respectively. The short-leg portal frames are connected to the second longitudinal traveling mechanism but not fixed, and fix the transverse cantilevers on both sides of the short-leg portal frames.

[0015] Step 1.4 Hoist and fix the longitudinal truss beams respectively between the ends of the adjacent transverse cantilevers longitudinally, and install the first longitudinal traveling mechanism on the top of the longitudinal truss beams.

[0016] Step 1.5 Hoist and place four transverse truss beams between the two longitudinal truss beams. Each transverse truss beam is provided with a transverse traveling mechanism. Divide the four transverse truss beams into two groups of transverse truss systems through the transverse truss end connecting beams, and each group of transverse truss systems is arranged on the first longitudinal traveling mechanism on the longitudinal truss beam.

[0017] Step 1.6 Place two hoisting trolleys on each transverse truss system to form a set of hoisting mechanisms; Each set of hoisting mechanisms is arranged on the transverse traveling mechanism on the transverse truss beam.

[0018] Preferably, in Step 1: The No. 1 capping beam, the No. 2 capping beam and the No. 3 capping beam are respectively located above the No. 1 pier column, the No. 2 pier column and the No. 3 pier column.

[0019] Preferably, in step 1: the horizontal cantilever is flush with the tops of both the long-leg gantry and the short-leg gantry; the distance that the outer end of the horizontal cantilever extends beyond the capping beam is 1.5 to 2.0 times the width of the precast beam.

[0020] Preferably, step 2 is specifically as follows:

[0021] Step 2.1: The beam transport truck transports the precast beam to beam position 1.

[0022] Step 2.2: Synchronously hoist the two sets of hoisting mechanisms to the two sides of parking space 1, and use the hooks and hoisting ropes on the hoisting trolleys to vertically lift the precast beam to beam position 2 synchronously.

[0023] Step 2.3: Slowly and synchronously move the two sets of hoisting mechanisms in the opposite horizontal direction along the transverse truss beam to the two sides of parking space 2, and the precast beam is also translated from beam position 2 to beam position 3.

[0024] Step 2.4: Keep the two sets of hoisting mechanisms at parking space 2 and vertically hoist the precast beam to beam position 4.

[0025] Step 2.5: Again, slowly and synchronously move the two sets of hoisting mechanisms in the opposite horizontal direction along the transverse truss beam to beam position 5 above the capping beam, and the precast beam is also translated from beam position 4 to beam position 5.

[0026] Step 2.6: Slowly and synchronously lower the precast beam at beam position 5 onto the capping beam with an existing base.

[0027] Step 2.7: Repeat steps 2.1 to 2.6 until all the precast beams between the first capping beam and the second capping beam are completely hoisted.

[0028] Preferably, in step 2: in the cross-section, beam position 1 is located on both sides of the motor vehicle lane close to the non-motor vehicle lane, and in the longitudinal section, beam position 1 is located exactly in the middle between two pier columns; parking space 1 is directly above beam position 1; beam position 2 is 20 - 30 cm below the capping beam; beam position 3 is at the same height as beam position 2, but the clear distance between beam position 3 and the side of the capping beam is 20 - 30 cm; parking space 2 is directly above beam position 3; beam position 4 is on the same vertical line as beam position 3, but the bottom of beam position 4 is 20 - 30 cm higher than the top of the capping beam; beam position 5 is at the same height as beam position 4, and the two beam positions 5 on both sides are connected, and the connection surface is at the center above the capping beam, and parking space 3 is directly above beam position 5.

[0029] Preferably, step 3 is specifically as follows:

[0030] Step 3.1: Move the two sets of transverse truss systems with the two sets of hoisting mechanisms backward along the first longitudinal traveling mechanism on the longitudinal truss beam to between the second capping beam and the third capping beam, and extend and lay out the second longitudinal traveling mechanism on the precast beam between the first capping beam and the second capping beam.

[0031] Step 3.2 The two short-leg gantries at the middle and rear of the horizontally placed bridge erecting machine longitudinally move along the second longitudinal traveling mechanism between the first capping beam and the third capping beam towards the zero capping beam, and the zero capping beam corresponds to the zero pier column at the lower part;

[0032] After the long-leg gantry reaches the designated position on the zero capping beam, stop the longitudinal movement; Remove the second longitudinal traveling mechanism on the precast beam between the second capping beam and the third capping beam, complete the longitudinal displacement of the horizontally placed bridge erecting machine for one span, and carry out the beam hoisting construction at this position according to the steps;

[0033] Step 3.4 Repeat Steps 3.1 to 3.3 to carry out the longitudinal displacement of the horizontally placed bridge erecting machine for the next span until all the erection operations are completed.

[0034] The beneficial effects of the present invention are as follows:

[0035] 1) Compared with the traditional bridge erecting machine, the width of the bridge erecting machine of the present invention is widened; There are only two hoisting trolleys in the traditional bridge erecting machine, while the present invention can be equipped with four hoisting trolleys, so the present invention can synchronously hoist two symmetric precast beams at one time, doubling the erection efficiency.

[0036] 2) Compared with the erection method of feeding the beam from the back, the present invention does not need to set up a beam lifting station, nor does it need to close the road for beam hoisting. It can efficiently complete the precast beam erection operation while ensuring the smoothness of the road, effectively improving the social and technical benefits of the construction technology.

[0037] 3) Compared with the erection steps of high-low hoisting, the present invention simplifies the eighteen steps of high-low hoisting to six steps, and can simultaneously hoist two precast beams symmetrically. Compared with the high-low hoisting that can only erect one precast beam at a time, the erection efficiency is significantly improved. Description of the Drawings

[0038] Figure 1 is the longitudinal sectional assembly diagram of the horizontally placed bridge erecting machine group;

[0039] Figure 2 is the top view of the horizontally placed bridge erecting machine group;

[0040] Figure 3 is Figure 1 the A-A cross-sectional diagram in

[0041] Figure 4 is Figure 1 the B-B cross-sectional diagram in

[0042] Figure 5 is Figure 1 the C-C cross-sectional diagram in

[0043] Figure 6 is the assembly flow chart of the horizontally placed bridge erecting machine group;

[0044] Figure 7 It is a longitudinal sectional view of the beam hoisting of a horizontally placed bridge girder erecting machine;

[0045] Figure 8 It is a top view of the beam hoisting of a horizontally placed bridge girder erecting machine;

[0046] Figure 9 It is a cross-sectional view of the beam hoisting process of a horizontally placed bridge girder erecting machine;

[0047] Figure 10 It is a cross-sectional view after the beam of a horizontally placed bridge girder erecting machine is lowered;

[0048] Figure 11 It is a longitudinal sectional view after the beam of a horizontally placed bridge girder erecting machine is lowered;

[0049] Figure 12 It is a process flow chart of the beam hoisting of a horizontally placed bridge girder erecting machine;

[0050] Figure 13 It is a longitudinal sectional view of the rear-mounted hoisting trolley and the laying of the second longitudinal traveling mechanism on the erected precast beam;

[0051] Figure 14 It is a longitudinal sectional view of the horizontal displacement process of a horizontally placed bridge girder erecting machine;

[0052] Figure 15 It is a top view of the horizontal displacement process of a horizontally placed bridge girder erecting machine;

[0053] Figure 16 It is a longitudinal sectional view of the end of the horizontal displacement of a horizontally placed bridge girder erecting machine and the removal of the second longitudinal traveling mechanism at the rear;

[0054] Figure 17 It is a process flow chart of the longitudinal displacement of a horizontally placed bridge girder erecting machine;

[0055] Figure 18 It is the overall process flow chart of the use of a horizontally placed bridge girder erecting machine.

[0056] Explanation of reference numerals: 1 - Beam position one; 2 - Beam position two; 3 - Beam position three; 4 - Beam position four; 5 - Beam position five; 6 - Precast beam; 7 - Trolley position one; 8 - Trolley position two; 9 - Trolley position three; 10 - Hoisting trolley; 11 - Transverse truss beam; 12 - First longitudinal traveling mechanism; 13 - Longitudinal truss beam; 14 - Transverse cantilever; 15 - Long-leg gantry; 16 - Capping beam; 160 - No. 0 capping beam; 161 - No. 1 capping beam; 162 - No. 2 capping beam; 163 - No. 3 capping beam; 17 - Pier column; 170 - No. 0 pier column; 171 - No. 1 pier column; 172 - No. 2 pier column; 173 - No. 3 pier column; 19 - Non-motor vehicle lane; 20 - Motor vehicle lane; 21 - Beam transport truck; 22 - Second longitudinal traveling mechanism; 23 - Short-leg gantry; 24 - Hook; 25 - Hoisting rope; 26 - Transverse traveling mechanism; 27 - Transverse truss end connecting beam. Detailed implementation manners

[0057] The present invention will be further described below in conjunction with embodiments. The description of the following embodiments is only for helping to understand the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0058] The overall process flow of the horizontal bridge erection machine and its use method is shown in Figure 18 as follows, and specifically includes the following implementation steps:

[0059] Step 1: Assemble the horizontal bridge erection machine, and its process is shown in Figure 6 as follows, and specifically includes the following steps:

[0060] 1.1 Combine Figure 1 , Figure 2 and Figure 3 , fix the long-leg gantry 15 on the first capping beam 161, and fix the transverse cantilevers 14 on both sides of the long-leg gantry 15. The transverse cantilevers 14 are flush with the top of the long-leg gantry 15, and the outer end of the transverse cantilever 14 extends beyond the capping beam 16 by a distance of 1.5 to 2.0 times the width of the precast beam 6. The lower part of the first capping beam 161 corresponds to the first pier column 171;

[0061] 1.2 Combine Figure 1 , Figure 2 , Figure 4 and Figure 5 , install the second longitudinal traveling mechanism 22 on the precast beam 6 that has been erected between the second capping beam 162 and the third capping beam 163. The lower parts of the second capping beam 162 and the third capping beam 163 respectively correspond to the second pier column 172 and the third pier column 173;

[0062] 1.3 Combine Figure 1 , Figure 2 , Figure 4 and Figure 5 , hoist and fix two longitudinal truss beams 13 at the end parts of the three transverse cantilevers 14 on both sides respectively. The first longitudinal traveling mechanism 12 is provided on the longitudinal truss beam 13;

[0063] 1.4 Combine Figures 1 to 5 , hoist and fix two longitudinal truss beams 13 at the end parts of the three transverse cantilevers 14 on both sides respectively. The first longitudinal traveling mechanism 12 is provided on the longitudinal truss beam 13;

[0064] 1.5 Combine Figure 1 , Figure 2 and Figure 4, four transverse truss beams 11 are suspended between two longitudinal truss beams 13. Each transverse truss beam 11 is provided with a transverse traveling mechanism 26. The four transverse truss beams 11 are divided into two groups of transverse truss systems by a transverse truss end connecting beam 27. Each group of transverse truss systems can move longitudinally along the first longitudinal traveling mechanism 12 on the longitudinal truss beam 13;

[0065] 1.6 combination Figure 1 、 Figure 2 and Figure 4 , four overhead traveling cranes 10 are suspended to two longitudinal moving mechanisms. Two overhead traveling cranes 10 are placed on each longitudinal moving mechanism to form two groups of hoisting mechanisms. Each group of hoisting mechanisms can move transversely along the transverse traveling mechanism 26 on the transverse truss beam 11, completing the assembly of the horizontally placed bridge erecting machine and enabling the next beam hoisting operation.

[0066] Step 2: The beam hoisting process of the horizontally placed bridge erecting machine is carried out symmetrically and synchronously on both sides. The process is shown in Figure 12 as follows, specifically including the following steps:

[0067] 2.1 combination Figure 9 , a beam transporting truck 21 transports a precast beam 6 to beam position 1. Beam position 1 refers to the side of the motor vehicle lane 20 close to the non-motor vehicle lane 19 in the cross-section and the middle between two pier columns 17 in the longitudinal section;

[0068] 2.2 combination Figure 7 、 Figure 8 and Figure 9 , the two groups of hoisting mechanisms are synchronously hoisted to parking positions 7 on both sides. Parking position 7 is directly above beam position 1. The precast beam 6 is vertically lifted to beam position 2 by using the hooks 24 and lifting ropes 25 on the overhead traveling crane 10 synchronously. Beam position 2 is 20 - 30 cm directly below the capping beam 16;

[0069] 2.3 combination Figure 9 , along the transverse truss beam 11, the two groups of hoisting mechanisms are slowly and synchronously moved transversely in the opposite direction to parking positions 8 on both sides. The precast beam 6 is also translated from beam position 2 to beam position 3, that is, beam position 3 is at the same height as beam position 2, but the clear distance from the side of the capping beam 16 is 20 - 30 cm, and parking position 8 is directly above beam position 3;

[0070] 2.4 combination Figure 9 , the two groups of hoisting mechanisms are kept at parking position 8 and the precast beam 6 is vertically hoisted to beam position 4. Beam position 4 is on the same vertical line as beam position 3, but the bottom of beam position 4 is 20 - 30 cm higher than the top of the capping beam 16;

[0071] 2.5 combination Figure 9, again move the two sets of hoisting mechanisms slowly and synchronously along the transverse truss beam 11 in opposite directions to position five 5 above the capping beam 16. The precast beam 6 is also translated from position four 4 to position five 5, that is, position five 5 and position four 4 are at the same height, but 20 - 30 cm above the directly above the capping beam 16; parking space three 9 is directly above position five 5

[0072] 2.6 Combining Figure 10 and Figure 11 , slowly and synchronously lower the precast beam 6 at position five 5 onto the capping beam 16 with an existing base

[0073] 2.7 Repeat steps 2.1 - 2.6 until all the precast beams 6 between the first capping beam 161 and the second capping beam 162 in a certain cross-section are completely hoisted, and the next longitudinal shifting operation of the transverse bridge erecting machine can be carried out

[0074] Step 3: Longitudinal shifting of the transverse bridge erecting machine, the process is shown in Figure 17 as shown, and specifically includes the following steps

[0075] 3.1 Combining Figure 13 , after all the precast beams 6 in a certain cross-section are hoisted, move the two sets of transverse truss systems with the two sets of hoisting mechanisms backward along the first longitudinal traveling mechanism 12 on the longitudinal truss beam 13 to between the second capping beam 162 and the third capping beam 163, and extend and lay out the second longitudinal traveling mechanism 22 on the precast beam 6 between the first capping beam 161 and the second capping beam 162

[0076] 3.2 Combining Figure 14 and Figure 15 , the two short leg gantries 23 at the middle and rear of the transverse bridge erecting machine start to slowly move longitudinally along the second longitudinal traveling mechanism 22 between the first capping beam 161 and the third capping beam 163 towards the zero capping beam 16. The zero capping beam 16 corresponds to the zero pier column 170 below

[0077] 3.3 Combining Figure 16 , after the long leg gantry 15 at the front of the transverse bridge erecting machine reaches the designated position on the zero capping beam 16, stop the longitudinal movement. At the same time, remove the second longitudinal traveling mechanism 22 on the precast beam 6 between the second capping beam 162 and the third capping beam 163, and complete the longitudinal shifting of the transverse bridge erecting machine for one span, and the hoisting operation of the precast beam 6 in the next cross-section can be carried out

[0078] 3.4 Repeat steps 3.1 - 3.3 for the longitudinal shifting of the transverse bridge erecting machine for the next span until all the erection operations are completed, and the next step of the demolition operation of the transverse bridge erecting machine can be carried out

[0079] Step 4: After all the erection operations of the precast beam 6 are completed, in the reverse order of the assembly of the transverse bridge erector, remove the lifting trolley 10 → transverse truss beam 11 → longitudinal truss beam 13 → short-leg gantry 23 and transverse cantilever 14 → second longitudinal traveling mechanism 22 → long-leg gantry 15 and transverse cantilever 14 in sequence to complete the demolition operation of the transverse bridge erector.

Claims

1. A method for using a horizontally placed bridge erecting machine, characterized in that, it includes the following steps: Step 1. Assemble the horizontally placed bridge erecting machine: Fix the long-leg gantry (15) on the first capping beam (161) and install the transverse cantilever (14). Install the second longitudinal traveling mechanism (22) between the second capping beam (162) and the third capping beam (163). Lift and place the short-leg gantry (23) and install the transverse cantilever (14). Hoist and fix the longitudinal truss beam (13) and install the first longitudinal traveling mechanism (12). Install the transverse truss system and place the lifting trolley (10) to form a lifting mechanism; Step 1.1 Fix the long-leg gantry (15) on the first capping beam (161), and fix the transverse cantilever (14) on both sides of the long-leg gantry (15); Step 1.2 Install the second longitudinal traveling mechanism (22) on the precast beam (6) that has been erected between the second capping beam (162) and the third capping beam (163); Step 1.3 Lift and place the short-leg gantry (23) at both ends of the second longitudinal traveling mechanism (22) respectively. The short-leg gantry (23) is connected to the second longitudinal traveling mechanism (22) but not fixed. Fix the transverse cantilever (14) on both sides of the short-leg gantry (23); Step 1.4 Hoist and fix the longitudinal truss beam (13) respectively between the ends of the adjacent transverse cantilevers (14) longitudinally, and install the first longitudinal traveling mechanism (12) on the top of the longitudinal truss beam (13); Step 1.5 Lift and place four transverse truss beams (11) between the two longitudinal truss beams (13). Each transverse truss beam (11) is provided with a transverse traveling mechanism (26). Divide the four transverse truss beams (11) into two groups of transverse truss systems through the transverse truss end connecting beam (27). Each group of transverse truss systems is arranged on the first longitudinal traveling mechanism (12) on the longitudinal truss beam (13); Step 1.6 Place two lifting trolleys (10) on each transverse truss system to form a group of lifting mechanisms; Each group of lifting mechanisms is arranged on the transverse traveling mechanism (26) on the transverse truss beam (11); Step 2. Conduct synchronous beam lifting of the horizontally placed bridge erecting machine: Through the lifting mechanism, symmetrically lift the precast beams (6) on both sides from beam position one (1) to beam position five (5) and lower the beams onto the capping beam (16); Repeat the hoisting until the hoisting of all precast beams (6) between the first capping beam (161) and the second capping beam (162) is completed; Step 2.1 The beam transport truck (21) transports the precast beam (6) to beam position one (1); Step 2.2 Synchronously adjust the two groups of lifting mechanisms to the two sides of parking space one (7), and use the hooks (24) and lifting ropes (25) on the lifting trolleys (10) to synchronously vertically lift the precast beam (6) to beam position two (2); Step 2.3 Along the transverse truss beam (11), slowly and synchronously move the two groups of lifting mechanisms in the opposite transverse direction to the two sides of parking space two (8), and the precast beam (6) also translates from beam position two (2) to beam position three (3), Step 2.4 Keep the two groups of lifting mechanisms at parking space two (8) and vertically lift the precast beam (6) to beam position four (4), Step 2.5 Again, along the transverse truss beam (11), slowly and synchronously move the two hoisting mechanisms laterally towards each other to the beam position five (5) above the capping beam (16), and the precast beam (6) is also translated from the beam position four (4) to the beam position five (5). Step 2.6 Slowly and synchronously lower the precast beam (6) at the beam position five (5) onto the capping beam (16) with an existing base. Step 2.7 Repeat steps 2.1 to 2.6 until all the precast beams (6) between the first capping beam (161) and the second capping beam (162) are completely hoisted. Step 3. Longitudinal displacement of the transverse bridge erector: Rearrange the hoisting mechanism, and longitudinally move the transverse bridge erector towards the direction of the zero capping beam (160) by extending and laying the second longitudinal traveling mechanism (22); then move the hoisting mechanism to the new beam hoisting position to complete the hoisting of all the precast beams (6) between the first capping beam (161) and the zero capping beam (160); repeat the displacement and hoisting until all the erection operations of the precast beams (6) are completed. Step 4. Demolish the transverse bridge erector: In the reverse order of the transverse bridge erector assembly, sequentially demolish the hoisting trolley (10), the transverse truss system, the longitudinal truss beam (13), the short-leg gantry (23) and the transverse cantilever (14), the second longitudinal traveling mechanism (22), the long-leg gantry (15) and the transverse cantilever (14) to complete the demolition operation of the transverse bridge erector.

2. The method for using the transverse bridge erector according to claim 1, characterized in that, in step 1: The first capping beam (161), the second capping beam (162) and the third capping beam (163) are respectively located above the first pier column (171), the second pier column (172) and the third pier column (173).

3. The method for using the transverse bridge erector according to claim 1, characterized in that, in step 1: The transverse cantilever (14) is flush with the tops of the long-leg gantry (15) and the short-leg gantry (23); the outer end of the transverse cantilever (14) extends beyond the capping beam (16) by a distance of 1.5 to 2.0 times the width of the precast beam (6).

4. The method for using the transverse bridge erector according to claim 1, characterized in that, in step 2: In the cross-section, the beam position one (1) is located on both sides of the motor vehicle lane (20) close to the non-motor vehicle lane (19), and in the longitudinal section, the beam position one (1) is located exactly in the middle between two pier columns (17); the parking space one (7) is located directly above the beam position one (1); the beam position two (2) is located 20 - 30 cm directly below the capping beam (16); the beam position three (3) is at the same height as the beam position two (2), but the clear distance between the beam position three (3) and the side of the capping beam (16) is 20 - 30 cm; the parking space two (8) is located directly above the beam position three (3); the beam position four (4) is on the same vertical line as the beam position three (3), but the bottom of the beam position four (4) is 20 - 30 cm higher than the top of the capping beam (16); the beam position five (5) is at the same height as the beam position four (4), and the two beam positions five (5) on both sides are connected, and the connection surface is located at the center above the capping beam (16), and the parking space three (9) is located directly above the beam position five (5).

5. The method for using the transverse bridge erector according to claim 1, characterized in that, step 3 is specifically: Step 3.1 Along the first longitudinal traveling mechanism (12) on the longitudinal truss beam (13), move the two sets of transverse truss systems with the two sets of hoisting mechanisms backward to the position between the second capping beam (162) and the third capping beam (163), and extend and install the second longitudinal traveling mechanism (22) on the precast beam (6) between the first capping beam (161) and the second capping beam (162). Step 3.2 The two short-leg gantry frames (23) at the middle and rear of the horizontally placed bridge girder erecting machine longitudinally move along the second longitudinal traveling mechanism (22) between the first capping beam (161) and the third capping beam (163) towards the direction of the zero capping beam (160), and the zero capping beam (160) corresponds to the zero pier column (170) below. Step 3.3 After the long-leg gantry frame (15) reaches the designated position on the zero capping beam (160), stop the longitudinal movement; remove the second longitudinal traveling mechanism (22) on the precast beam (6) between the second capping beam (162) and the third capping beam (163), complete the longitudinal displacement of the horizontally placed bridge girder erecting machine for one span, and carry out the beam hoisting construction at this position according to step (2). Step 3.4 Repeat steps 3.1 to 3.3 to carry out the longitudinal displacement of the horizontally placed bridge girder erecting machine for the next span until all the erection operations are completed.

Images