Transverse Moving Track and Precise Beam Lowering Construction Method

Abstract

The present invention discloses a transverse movement track and a precise beam dropping construction method. The transverse movement track includes: a type-I track and a type-II track. One end of the type-I track adjacent to the type-II track is detachably connected. A No. I safety baffle is provided at one end of the type-I track away from the type-II track, and a No. II safety baffle is provided at one end of the type-II track away from the type-I track. This transverse movement track can achieve the safe erection and precise beam dropping of non-parallel beams, achieving the effects of accelerating the construction progress, shortening the construction period, and improving safety.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge jacking construction, and particularly to a transverse movement track and a precise beam dropping construction method. Background Art

[0002] During the construction of high-speed viaducts, it is often necessary to widen the section due to the curve section and the leading ramp. Firstly, the construction of the curve section of the viaduct is more difficult, and the requirement for accuracy is higher than that of the straight section. Secondly, the widened section of the high-speed viaduct is for leading the ramp entrance, which greatly increases the difficulty of the main beam erection, especially the erection of non-parallel beams is even more difficult. Therefore, for the high-speed viaduct section that is both in the curve section and needs to be widened to lead the ramp, using a bridge erection machine to perform beam erection and beam dropping operations on the conventional straight transverse movement track not only has a large construction difficulty, but also has certain safety hazards.

[0003] At this time, when using a straight transverse movement track to perform non-parallel erection construction of side beams on the curve widened section of the highway bridge, a crane can be used for left and right displacement. When controlling the displacement difference between the front crane displacement and the rear crane displacement, the angle deviation required for beam erection can be achieved, so as to realize the erection of non-parallel beams. When the crane displacement is insufficient, it is necessary to first move the bridge erection machine along the straight transverse movement track to one side as a whole, and then control the displacement difference between the front and rear cranes to realize the erection of non-parallel beams. Or arrange the front, middle, and rear outriggers of the bridge erection machine in a staggered manner to adapt to the angle required for non-parallel beam erection in this way. And there is a certain gap between the outrigger wheel sets of the bridge erection machine and the track, which can allow a certain angle deviation of the outrigger wheel sets of the bridge erection machine on the straight transverse movement track. In this way, the non-parallel beam erection construction can also be realized. When operating in the former construction, moving the bridge erection machine to one side as a whole and then using the crane to achieve the angle deviation required for beam erection will concentrate all the loads on one side of the bridge body, with cumbersome operation and certain safety hazards; while in the latter, although there is a certain gap between the outrigger wheel sets of the bridge erection machine and the track, which can allow a certain angle deviation of the outrigger wheel sets of the bridge erection machine on the straight transverse movement track, once the angle required for the widened section during construction exceeds the limit that the structural gap can allow, it is easy to cause the outrigger wheel sets of the bridge erection machine to derail on the straight transverse movement track, resulting in the occurrence of safety accidents. Summary of the Invention

[0004] The purpose of the present invention is to provide a transverse movement track and a precise beam dropping construction method. Aiming at the safety hazard problem existing in the non-parallel beam erection construction of the conventional straight transverse movement track of the bridge erection machine on the curve widened section, this transverse movement track can realize the safe erection and precise beam dropping of non-parallel beams, achieving the effects of accelerating the construction progress, shortening the construction period, and improving the safety, and can be widely used for the erection of non-parallel beams in the bridge curve section and the ramp widened section.

[0005] To achieve the above object, on the one hand, the present invention provides a transverse track, which includes: a type-I track and a type-II track. One end of the type-I track adjacent to the type-II track is detachably connected. A No. I safety baffle is provided at one end of the type-I track away from the type-II track, and a No. II safety baffle is provided at one end of the type-II track away from the type-I track.

[0006] Preferably, on both sides of the type-I track, there are No. I grooves extending along its length direction. On both sides of the type-II track, there are No. II grooves extending along its length direction. At the adjacent end parts of the No. I groove and the No. II groove, there are respectively a No. I connection hole and a No. II connection hole for installing bolts.

[0007] Preferably, at the end part of each No. I groove adjacent to the type-II track, there are a plurality of the No. I connection holes arranged along the vertical direction. At the end part of each No. II groove adjacent to the type-I track, there are a plurality of the No. II connection holes arranged along the vertical direction.

[0008] Preferably, the heights of both the No. I safety baffle and the No. II safety baffle are higher than the height of the leg wheel set of the bridge erecting machine.

[0009] Preferably, the type-I track is a type-I straight track or a type-I curved track, the type-II track is a type-II straight track or a type-II curved track, and the type-I curved track and the type-II curved track are concentric tracks.

[0010] On the other hand, the present invention provides a precise beam-lowering construction method using the above transverse track. The precise beam-lowering construction method includes the following steps:

[0011] 1) Use a type-I straight track for the type-I track and a type-II straight track for the type-II track, and connect the type-I straight track and the type-II straight track to form a straight transverse track;

[0012] 2) Erection the straight transverse track at the bridgehead or the end of the precast beam, and at the front bridge pier respectively, and after keeping the two straight transverse tracks parallel, erect the bridge erecting machine;

[0013] 3) Use the bridge erecting machine installed on the straight transverse track to erect the middle beam and the inner side beam parallel to the middle beam;

[0014] 4) Replace the type-I straight track with a type-I curved track, replace the type-II straight track with a type-II curved track, and connect them to form a curved transverse track;

[0015] 5) Use the bridge erecting machine installed on the curved transverse track to erect the outer side beam.

[0016] Preferably, the method of replacing the straight traversing track with a curved traversing track in step 4) is as follows: First, move the bridge erecting machine to the type-I straight track near the inner side and replace the type-II straight track near the outer side with a type-II curved track; then move the bridge erecting machine to the type-II curved track and replace the type-I straight track with a type-I curved track, and connect it to the type-II curved track at the same time.

[0017] Preferably, before erecting the straight traversing track in step 1), place sleepers on the head or the end of the precast beam, as well as on the front pier, place the straight traversing track on the sleepers, and then level the straight traversing track.

[0018] Preferably, in step 5), when the front outrigger and the middle outrigger are misaligned due to inconsistent displacement speeds when the bridge erecting machine traverses on the curved traversing track, adjust the speed of the front outrigger or the middle outrigger.

[0019] Preferably, the erection of the outer side beam in step 5) sequentially includes feeding the beam, carrying the beam and traversing, lowering the beam, longitudinal movement of the bridge erecting machine, and traversing the bridge erecting machine back to the beam transporting path.

[0020] According to the above technical solution, the traversing track in the present invention can realize the safe erection and accurate beam lowering of non-parallel beams, achieving the effects of accelerating the construction progress, shortening the construction period, and improving safety.

[0021] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification, and are used to explain the present invention together with the following specific implementation, but do not constitute a limitation to the present invention. In the drawings:

[0023] Figure 1 is the overall structural schematic diagram of a preferred embodiment of the traversing track;

[0024] Figure 2 is the overall structural schematic diagram of a preferred embodiment of the type-I track;

[0025] Figure 3 is the arrangement schematic diagram of a preferred embodiment of the bolt;

[0026] Figure 4 is the arrangement schematic diagram of a preferred embodiment of the nut;

[0027] Figure 5 is the overall structural schematic diagram of a preferred embodiment of the type-II track;

[0028] Figure 6It is a schematic process diagram for disassembling and assembling a linear transverse track into a curved transverse track;

[0029] Figure 7 It is a side view of an operating state of a bridge erecting machine;

[0030] Figure 8 It is a sectional view of an operating state of a bridge erecting machine;

[0031] Figure 9 It is a top view schematic diagram of an operating state of a bridge erecting machine;

[0032] Figure 10 It is a schematic diagram for calculating the displacement speed difference of the leg wheel set on the curved transverse track.

[0033] Explanation of reference numerals

[0034] Track type 10 - Ⅰ; Connection hole Ⅰ - 11; Safety baffle Ⅰ - 12; Bolt 20; Nut 30; Track type 40 - Ⅱ; Connection hole Ⅱ - 41; Safety baffle Ⅱ - 42; Linear track type 101 - Ⅰ; Curved track type 102 - Ⅰ; Curved transverse track 103; Linear track type 401 - Ⅱ; Curved track type 402 - Ⅱ; Girder suspension trolley 50; Parallel beam 61; Non - parallel beam 62; Double guide beam 70; Transverse roller 71; Longitudinal track 80; Front leg 90; Middle leg 110; Capping beam 120; Track limit plate 121; Rear leg 130; Erected beam 140; Beam transport trolley 150; Transverse track 160; Limit baffle 161; Transverse track 1. Detailed implementation manners

[0035] The following will describe in detail the specific implementation manners of the present invention with reference to the accompanying drawings. It should be understood that the specific implementation manners described herein are only for explaining and illustrating the present invention, and are not used to limit the present invention.

[0036] In the present invention, unless otherwise stated, the orientation words such as "up and down, left and right, front and back, inside and outside" included in the terms only represent the orientation of the terms in the normal use state, or the common names understood by those skilled in the art, and should not be regarded as a limitation to the terms.

[0037] See Figure 1-6 The transverse track 1 shown in the figure, the transverse track 1 includes: track type 1 - Ⅰ and track type 40 - Ⅱ. One end of the track type 1 - Ⅰ adjacent to the track type 40 - Ⅱ is detachably connected. One end of the track type 1 - Ⅰ far from the track type 40 - Ⅱ is provided with a safety baffle Ⅰ - 12, and one end of the track type 40 - Ⅱ far from the track type 1 - Ⅰ is provided with a safety baffle Ⅱ - 42.

[0038] The transverse movement track 1 can be used for erecting non-parallel beams 6261 in the curve widening section of a highway bridge, ensuring that the front outriggers 90 and middle outriggers 110 of the bridge erecting machine move synchronously on the curve transverse movement track 103 with a certain proportion of displacement difference and speed difference, avoiding the situation that the conventional straight transverse movement track needs to move the whole bridge erecting machine to one side, resulting in the load concentrating on one side of the bridge body, and the front, middle, and rear outriggers 130 being arranged out of position to adapt to the angular offset required for the erection of non-parallel beams 6261. Thus, the safe erection and accurate beam dropping of non-parallel beams 6261 are achieved, and the construction progress is accelerated, the construction period is shortened, and the safety is improved. In addition, the transverse movement track 1 is composed of two segmented components, with flexible splicing and simple operation, improving the construction efficiency and increasing the economic benefits. It can adopt the combination modes of straight-straight, straight-curve, curve-straight, and curve-curve when erecting non-parallel beams 6261. When using the curve-curve combination mode, since the transverse movement track 1 is in an arc shape, which is consistent with the moving direction of the wheel set, the construction is smoother, ensuring the construction safety. Among them, in the curve-curve combination mode, both are working as arc segmented components of the overall curve transverse movement track 103. The central tangent slopes of the type I track 1 and the type II track 40 are zero, and their overall radian and curvature from the center to the outer edge need to be designed according to the widths and spans of the sections before and after the bridge deck widening in the actual project. In this way, it can effectively avoid the limitation that the conventional straight transverse movement track of the bridge erecting machine needs to arrange the front outriggers 90, middle outriggers 110, and rear outriggers 130 out of position during such construction, eliminate the potential safety hazards during construction, and accelerate the construction progress.

[0039] In this embodiment, on both sides of the type I track 1, there are No. 1 grooves extending along its length direction, and on both sides of the type II track 40, there are No. 2 grooves extending along its length direction. At the adjacent ends of the No. 1 groove and the No. 2 groove, there are respectively No. 1 connection holes 11 and No. 2 connection holes 41 for installing bolts 20. With such a setting, both the type I track 1 and the type II track 40 adopt I-shaped steel channels with closed ends. The top surface of the I-shaped steel channel is provided with guide rails. One is for lightweight design, and the other is for facilitating the installation of bolts 20 and reducing the disassembly and assembly difficulty. The positions of the No. 1 connection holes 11 and the No. 2 connection holes 41 correspond one by one, and they are all locked and fixed by nuts 30 after the bolts 20 pass through.

[0040] As Figure 3 and Figure 4As shown, at each end of each No. I groove adjacent to the No. II track 40, a plurality of No. I connection holes 11 are arranged in the vertical direction, and at each end of each No. II groove adjacent to the No. I track 1, a plurality of No. II connection holes 41 are arranged in the vertical direction. The two No. I tracks 1 and the No. II track 40 are locked by two rows of bolts 20 to ensure the connection strength. Of course, other arrangement methods can also be adopted, such as arranging in a wavy shape along the vertical direction by itself.

[0041] For example, in an embodiment, there are 8 bolts 20, nuts 30, No. I connection holes 11, and No. II connection holes 41 respectively. The bolt 20 is fixed by the nut 30 through the No. I connection hole 11 and the No. II connection hole 41. The four cooperate to assemble the two arc-shaped segmented members of the No. I track 1 and the No. II track 40 into a complete curved transverse movement track 103.

[0042] In this embodiment, the heights of the No. I safety baffle 12 and the No. II safety baffle 42 are both higher than the height of the leg wheel set of the bridge erecting machine. Through such a setting, it is avoided that the leg 110 wheel set slides off or derails from the outer edge of the track during the construction process.

[0043] Furthermore, the No. I track 1 is a No. I straight track 101 or a No. I curved track 102, the No. II track 40 is a No. II straight track 401 or a No. II curved track 402, and the No. I curved track 102 and the No. II curved track 402 are concentric tracks. When changing the straight transverse movement track and the curved transverse movement track 103, first move the bridge erecting machine to the No. I straight track 101 or the No. II straight track 401, replace the No. I curved track 102 or the No. II curved track 402 at the other end, then move the bridge erecting machine to the replaced curved track, and replace the other straight track with a curved track and assemble it into the curved transverse movement track 103.

[0044] The curved transverse movement track 103 is assembled by two arc-shaped segmented members. When using the bridge erecting machine to erect the main beam, the trajectories of the curved transverse movement track 103 corresponding to the front and middle legs 110 of the bridge erecting machine are on concentric circles with the same center. This enables the bridge erecting machine not to move the whole body of the bridge erecting machine to one side of the bridge body to increase the load on one side of the bridge body, and at the same time does not need to deliberately change the placement angle of the transverse movement track to achieve the staggered distribution of the legs of the bridge erecting machine. It can still smoothly carry out the construction and realize the non-parallel laying of the main beam, thus avoiding the disadvantages of the conventional straight transverse movement track and ensuring the safety of the construction.

[0045] See Figure 10 , the trajectories of the curved transverse movement tracks 103 of the aforementioned widened section and the non-widened section are on concentric circle trajectories with the same origin, so their curvatures should satisfy the following mathematical relationship:

[0046] It can be obtained from the geometric relationship:

[0047]

[0048] b is the width of the section before widening; B is the width of the section after widening; ρ1 is the radius of curvature of the curved transverse moving track 103 before widening; L is the bridge span;

[0049] Curvature of the curved transverse moving track 103 before widening:

[0050]

[0051]

[0052] K1 is the curvature of the curved transverse moving track 103 before widening;

[0053] Curvature of the curved transverse moving track 103 after widening:

[0054]

[0055]

[0056] ρ2 is the radius of curvature of the curved transverse moving track 103 after widening; K2 is the curvature of the curved transverse moving track 103 after widening.

[0057] In addition, when laying non-parallel side girders, it is necessary to ensure that the bridge erecting machine runs smoothly on the arc-shaped transverse moving track. Since the curvature of its curved transverse moving track 103 is different before and after widening, there are also differences in the transverse speeds of the bridge erecting machine at the front outrigger 90 and the middle outrigger 110. In actual construction, a measuring instrument needs to be installed at the bridge erecting machine to conduct lateral observation of the moving displacement of the bridge erecting machine to ensure that the bridge erecting machines at the front and middle outriggers 110 rotate in parallel. Through the calibration of the measuring instrument, observe whether there is misalignment in the lateral movement of the bridge erecting machine at the front outrigger 90 and the middle outrigger 110. If the displacement of the bridge erecting machine at the front outrigger 90 is too large, reduce its speed; similarly, if the displacement of the bridge erecting machine at the middle and rear outriggers 130 is too large, reduce its speed.

[0058] There are displacement differences and speed differences in the lateral movement of the aforementioned front outrigger 90 and middle outrigger 110, so there are the following mathematical relationships:

[0059] Angle required for the erection of a single beam:

[0060]

[0061]

[0062] θ is the total angle required for the erection of all non-parallel beams 6261; α is the angle required for the erection of a single beam; n is the number of non-parallel beams 6261 that need to be rotated;

[0063] Displacement difference of the transverse movement of the front outrigger 90 and the middle outrigger 110:

[0064]

[0065]

[0066]

[0067] x1 is the displacement between the non-parallel beams 6261 on the road section before widening; x2 is the displacement between the non-parallel beams 6261 on the road section after widening; Δx is the displacement difference of the transverse movement of the front outrigger 90 and the middle outrigger 110;

[0068] Speed difference of the transverse movement of the front outrigger 90 and the middle outrigger 110:

[0069]

[0070] Δv outrigger is the speed difference of the transverse movement of the front outrigger 90 and the middle outrigger 110; t outrigger is the total time required for the transverse movement of the outriggers.

[0071] See Figure 7-9 , on the other hand, the present invention provides a precise beam-lowering construction method using the transverse movement track 1 described above. The precise beam-lowering construction method includes the following steps:

[0072] 1) Use the type-I track 1 with the type-I straight track 101, and the type-II track 40 with the type-II straight track 401, and connect the type-I straight track 101 and the type-II straight track 401 to form a straight transverse movement track;

[0073] 2) Erector the straight transverse movement track at the bridgehead or the end of the precast beam, and at the front bridge pier respectively, and erect the bridge erector after keeping the two straight transverse movement tracks parallel;

[0074] 3) Use the bridge erector installed on the straight transverse movement track to erect the middle beam and the inner side beam parallel to the middle beam;

[0075] 4) Replace the type-I straight track 101 with the type-I curved track 102, and replace the type-II straight track 401 with the type-II curved track 402, and connect them to form a curved transverse movement track 103;

[0076] 5) Use the bridge erector installed on the curved transverse movement track 103 to erect the outer side beam.

[0077] After the pushing of the middle beam and the parallel inner side beams is completed and the erection of the non-parallel side beams begins, the curved transverse movement track 103 is disassembled and assembled. The method of replacing the straight transverse movement track with the curved transverse movement track 103 in step 4) is as follows: First, move the bridge erecting machine to the type I straight track 101 close to the inner side and replace the type II straight track 401 close to the outer side with a type II curved track 402; then move the bridge erecting machine to the type II curved track 402 and replace the type I straight track 101 with a type I curved track 102, and at the same time connect it to the type II curved track 402. Use the bolt 20 to pass through the No. I connection hole 11 and the No. II connection hole 41 and then use the nut 30 to fix the type I curved track 102 and the type II curved track 402 to form an integral curved transverse movement track 103. Finally, carry out installation and safety inspection work.

[0078] It should be noted that when laying the non-parallel side beams, both the front outrigger 90 and the middle outrigger 110 of the bridge erecting machine need to disassemble and replace the curved transverse movement track 103. Since the track of the curved transverse movement track 103 is on the concentric circular track with the same center, when the overhead crane of the bridge erecting machine carries the beam to be erected, the transverse movement of the front outrigger 90 and the rear outrigger 130 needs to ensure that there is a certain displacement difference and speed difference between the two, so that the bridge erecting machine can run smoothly on the curved transverse movement track 103.

[0079] By installing a measuring instrument at the bridge erecting machine to observe its lateral displacement, ensure that the front outrigger 90 and the rear outrigger 130 of the bridge erecting machine rotate in parallel. If the front outrigger 90 and the rear outrigger 130 are misaligned due to inconsistent displacement speeds, adjustment is required. If the displacement of the bridge erecting machine at the front outrigger 90 is too large, its speed is reduced; the same applies to the rear outrigger 130.

[0080] In this embodiment, before erecting the straight transverse movement track in step 1), first place sleepers at the head or the end of the precast beam, and on the front bridge pier, and place the straight transverse movement track on the sleepers, and then level the straight transverse movement track. Specifically: erect the middle beam and the parallel inner side beams according to the conventional straight bridge erection. Place the sleepers horizontally on the bridge head or the end of the precast beam, and on the capping beam 120 of the front bridge pier, and keep the sleepers parallel; then use a lifting device to place the straight transverse movement track on the sleepers, and after connecting each section of the track, level it with a level, and then check whether there are gaps or insufficiently firm places in the placement of the straight transverse movement track and the sleepers, and use steel plates to pad and solidify to prevent the track from tipping over and hurting people.

[0081] In this embodiment, in step 5), when the front outrigger 90 and the middle outrigger 110 of the bridge erecting machine are misaligned due to inconsistent displacement speeds when the bridge erecting machine moves transversely on the curved transverse movement track 103, adjust the speed of the front outrigger 90 or the middle outrigger 110.

[0082] In this embodiment, the installation process of equipment such as a bridge erecting machine is as follows:

[0083] 1. Place the middle support wheel set. Place the lower middle support wheel set on the transverse movement track, install the motor reducer assembly and the rotating seat on the lower middle support wheel set, then place the reverse support wheel set on the rotating support, install the motor reducer assembly on the reverse support wheel set, connect the lower middle support wheel set and the middle support connecting rod with a pin shaft and install a split pin;

[0084] 2. Assemble the main beam. Build a stack of sleepers with the same height as the middle support, use a lifting device to place the front beam section on the middle support and the stack of sleepers, build another stack of sleepers (for sequential replacement when assembling beam sections), connect the beam section and the previous beam section with a pin shaft and install a split pin, and then sequentially assemble the beam sections;

[0085] 3. Assemble the front frame beam. Use a lifting device to lift the front frame beam, align it with the saddle at the front end of the main beam, and connect the two with a pin shaft, a split pin, and bolt 20;

[0086] 4. Assemble the rear upper crossbeam. Use a lifting device to lift the rear upper crossbeam and place it on the crossbeam fixing seat at the end beam section, and connect it with bolt 20;

[0087] 5. Assemble the front outrigger 90. First, install the pump station and add hydraulic oil to it, then fix the fixed end of the jack cylinder body on the supporting beam of the main beam with a pin shaft, insert a split pin, and connect the high-pressure oil pipe; install the motor reducer assembly on the front outrigger wheel set, connect the front outrigger wheel set, the standard section, and the front outrigger telescopic pipe into one body with bolt 20 and a pin shaft; put the bracket on the telescopic pipe, insert a pin shaft, and then install the bracket and the outrigger on the main beam together with bolt 20, insert a pin shaft to connect with the piston end of the jack; connect the front outrigger wheel set support connecting rod with a pin shaft.

[0088] 6. Assemble the rear outrigger 130. First, install the pump station and add hydraulic oil to it, then fix the fixed end of the jack cylinder body on the lifting lug of the main beam with a pin shaft, insert a split pin, and connect the high-pressure oil pipe; install the motor reducer assembly on the rear outrigger wheel set, install the bracket and the outrigger on the main beam with bolt 20, connect the telescopic pipe with the piston end of the jack through a pin shaft; place the rear wheel set on the beam transporting track, then lift and place the rear outrigger connecting beam on the rear outrigger wheel set, and connect the two into a whole with bolt 20; let the rear outrigger telescopic pipe drop, align the flange plates, and connect the rear outrigger telescopic pipe and the rear outrigger connecting beam with bolt 20.

[0089] 7. Assemble the overhead crane. Install the motor reducer assembly on the left and right overhead crane wheel sets with bolt 20 and place them properly, lift the overhead crane beam and place it on the left and right overhead crane wheel sets and connect it with a pin shaft and bolt 20, place the fixed pulley set and the hoisting trolley on the overhead crane beam, then install the winch on the hoisting trolley, and then lift the assembled overhead crane and place it on the main beam track.

[0090] 8. Installation of the circuit system.

[0091] For the erection steps of the middle beam and the parallel inner side beam according to the conventional straight bridge erection:

[0092] 1. Use a lifting device to place the beam on the beam transport trolley 150 and transport it to the rear section of the bridge erection machine. The front beam lifting trolley 50 of the bridge erection machine lifts the front end of the beam, and the rear end is supported on the beam transport trolley and continues to move forward. When the rear end of the beam to be lifted reaches the position of the rear beam lifting trolley 50 of the bridge erection machine, lift it up, and prepare for transverse beam erection;

[0093] 2. Transversely move the entire bridge erection machine and the beam to the position where the beam is to be erected. Appropriately jack up the front support leg 90 to eliminate the deflection when the beam is in cantilever and pad the front support leg 90 well;

[0094] 3. Longitudinally move the beam in place on the bridge erection machine, make fine adjustments longitudinally and transversely, adjust the bearing, and lower the beam in place;

[0095] 4. With the assistance of a jack, retract the front support leg 90, transversely move back to the beam transport path, and prepare to receive the beam.

[0096] In this embodiment, the erection of the outer side beam in step 5) sequentially includes feeding the beam, carrying the beam and moving it transversely, lowering the beam, longitudinally moving the bridge erection machine, and transversely moving the bridge erection machine back to the beam transport path. Specifically:

[0097] 1. Feed the beam. Use a lifting device to place the beam on the beam transport trolley 150 and move it to the rear section of the bridge erection machine. The front beam lifting trolley 50 of the bridge erection machine lifts the front end of the beam, and the rear section is supported on the beam transport trolley and continues to move forward. When the rear end of the beam to be lifted reaches the rear beam lifting trolley 50 of the bridge erection machine, lift it up, and then appropriately adjust the positions of the front and rear beam lifting trolleys 50 to prepare for transverse beam erection;

[0098] 2. Carry the beam and move it transversely. When erecting the non - parallel outer side beam, first align the center line of the outer guide beam of the bridge erection machine carrying the beam to be erected with the center line of the beam that has been in place beside the beam - lowering position. Then, the entire bridge erection machine moves according to the previously calculated displacement speed difference between the front and middle support legs 110 until the beam to be erected is displaced to the beam - lowering position, and then fix the bridge erection machine to restrict its transverse movement from affecting the beam - lowering process;

[0099] 3. Lower the beam. The overhead crane of the bridge erection machine starts to longitudinally feed the beam, make appropriate fine adjustments longitudinally and transversely, adjust the bearing, and complete the accurate beam - lowering;

[0100] 4. Longitudinally move the bridge erection machine. With the assistance of a jack, retract the front support leg 90, transversely move back to the beam transport path, and prepare to receive the beam; after all the beams are erected, the bridge erection machine returns to the beam transport path, jacks up the bridge erection machine, rotates the walking wheels, then longitudinally moves the bridge erection machine, and finally dismantles the bridge erection machine.

[0101] The preferred embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0102] In addition, it should be noted that, in the various specific technical features described in the above specific embodiments, they can be combined in any appropriate manner without conflict. To avoid unnecessary repetition, the present invention will not separately describe various possible combination methods.

[0103] Furthermore, any combination can be made between various different embodiments of the present invention, as long as it does not violate the idea of the present invention, and it should also be regarded as the content disclosed by the present invention.

Claims

1. A precise beam dropping construction method using a transverse moving track (1), characterized in that, The transverse translation track (1) includes: a type-I track (10) and a type-II track (40). One end of the type-I track (10) adjacent to the type-II track (40) is detachably connected. One end of the type-I track (10) away from the type-II track (40) is provided with a No. I safety baffle (12), and one end of the type-II track (40) away from the type-I track (10) is provided with a No. II safety baffle (42). The type-I track (10) is a type-I straight track (101) or a type-I curved track (102), the type-II track (40) is a type-II straight track (401) or a type-II curved track (402), and the type-I curved track (102) and the type-II curved track (402) are concentric tracks. The precise beam dropping construction method includes the following steps: 1) Use the type-I straight track (101) for the type-I track (10), use the type-II straight track (401) for the type-II track (40), and connect the type-I straight track (101) and the type-II straight track (401) to form a straight transverse translation track. 2) Erector the straight transverse translation track at the bridgehead or the end of the precast beam, and at the front pier respectively, and keep the two straight transverse translation tracks parallel and then erect the bridge erector. 3) Use the bridge erector installed on the straight transverse translation track to erect the middle beam and the inner side beam parallel to the middle beam. 4) Replace the type-I straight track (101) with the type-I curved track (102), replace the type-II straight track (401) with the type-II curved track (402), and connect them to form a curved transverse translation track (103). 5) Use the bridge erector installed on the curved transverse translation track (103) to erect the outer side beam. The method of replacing the straight transverse translation track with the curved transverse translation track (103) in step 4) is as follows: First, move the bridge erector to the type-I straight track (101) close to the inner side and replace the type-II straight track (401) close to the outer side with the type-II curved track (402). Then, move the bridge erector to the type-II curved track (402) and replace the type-I straight track (101) with the type-I curved track (102), and connect it to the type-II curved track (402) at the same time.

2. The precise beam dropping construction method according to claim 1, characterized in that, Before erecting the straight transverse translation track in step 1), place sleepers on the bridgehead or the end of the precast beam, and at the front pier, and place the straight transverse translation track on the sleepers, and then level the straight transverse translation track.

3. The precise beam dropping construction method according to claim 1, characterized in that, In step 5), when the front legs (90) and the middle legs (110) of the bridge erector are misaligned due to inconsistent displacement speeds during the transverse translation on the curved transverse translation track (103), adjust the speeds of the front legs (90) or the middle legs (110).

4. The precise beam lowering construction method according to claim 1, characterized in that In step 5), the erection of the outer side beam successively includes beam feeding, beam carrying and transverse translation, beam dropping, longitudinal translation of the bridge erector, and transverse translation of the bridge erector back to the beam transportation path.

5. The precise beam dropping construction method according to claim 1, characterized in that On both sides of the Type I track (10), there are Type I grooves extending along its length direction. On both sides of the Type II track (40), there are Type II grooves extending along its length direction. At the adjacent end parts of the Type I groove and the Type II groove, there are respectively a Type I connection hole (11) and a Type II connection hole (41) for installing the bolt (20).

6. The precise beam lowering construction method according to claim 5, characterized in that At the end part of each Type I groove adjacent to the Type II track (40), there are multiple Type I connection holes (11) arranged along the vertical direction. At the end part of each Type II groove adjacent to the Type I track (10), there are multiple Type II connection holes (41) arranged along the vertical direction.

7. The precise beam lowering construction method according to claim 1, characterized in that The heights of the Type I safety baffle (12) and the Type II safety baffle (42) are both higher than the height of the leg wheel set of the bridge erecting machine.

Images