A new segment assembling bridge erecting machine for precast segment beam construction

Abstract

The application discloses a new segment assembling bridge erecting machine for prefabricated segment beam construction, which comprises a main frame, front auxiliary supporting legs, two groups of middle supporting legs, rear auxiliary supporting legs, a first main overhead travelling crane, a second main overhead travelling crane, an auxiliary overhead travelling crane, a tensioning platform, a hanging assembly and a wet joint construction platform, the front auxiliary supporting legs, the two groups of middle supporting legs and the rear auxiliary supporting legs are arranged below the main frame, and the first main overhead travelling crane, the second main overhead travelling crane and the auxiliary overhead travelling crane are arranged on the main frame. The front auxiliary supporting legs, the rear auxiliary supporting legs and the middle supporting legs in the device all have large vertical adjustment amounts, can adapt to the use of larger longitudinal and transverse slope lines, meanwhile, the first main overhead travelling crane and the second main overhead travelling crane are provided with three-dimensional adjusting devices, so that the planeness adjustment angle of the lifting appliance is large, and the device is more favorable for adapting to larger longitudinal and transverse slope beam erection. The front auxiliary supporting legs and the middle supporting legs in the device can rotate by a certain angle, and the device is more favorable for adapting to small curve construction.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, and in particular to a novel segmental assembly and erection bridge machine for the construction of precast segmental beams. Background Technology

[0002] In recent years, with the rapid development of road traffic and urban construction in major cities across the country, the construction environment of elevated bridge projects in cities has become more complex. Specifically, the horizontal curves of the lines are small, the longitudinal slopes are large, and the bridges are densely distributed and long. At the same time, the urban environment is inherently narrow, densely populated, and has heavy traffic, which causes great interference to bridge construction. Therefore, more requirements have been put forward for bridge construction, and the precast segmental beam assembly technology has also been applied.

[0003] Currently, the existing segmental beam bridge erection machines in China are insufficient to meet the construction needs of special conditions such as large spans, small turning radii, steep slopes, double-span bridge erection, and impassable underground roads. Therefore, in order to adapt to the rapid development of urban rail and highway transportation in the future, it is necessary to develop a new type of bridge erection machine that can meet the needs of bridge erection construction for large spans, small curves, and steep slopes in urban rail transit projects. Summary of the Invention

[0004] This invention addresses the problems existing in the prior art by providing a novel segmental assembly and erection bridge machine for the construction of precast segmental beams.

[0005] The technical solution adopted to achieve the above objectives is:

[0006] A novel segmental bridge erection machine for precast segmental beam construction includes a main frame, front auxiliary legs, rear auxiliary legs, two middle legs, a main gantry crane, and auxiliary gantry cranes. The main gantry crane and auxiliary gantry cranes are mounted on the main frame and can move along the main frame. The front auxiliary legs and rear auxiliary legs are respectively located at the front and rear ends of the main frame. Its distinguishing feature is that...

[0007] Both of the aforementioned middle support legs include a support assembly and a first lifting assembly. The first lifting assembly is located below the support assembly. The middle support legs are slidably located below the main frame via the support assembly. The support assembly consists of two shifting trolleys and a support leg crossbeam. The shifting trolleys are divided into an upper part and a lower part. The lower part of the shifting trolley is located on the support leg crossbeam, and the upper part of the shifting trolley is connected to the main frame. The upper part of the shifting trolley can rotate along the central axis of the lower part of the shifting trolley.

[0008] The front auxiliary support leg includes a second lifting component, a rotating component, and a first fixing component. The second lifting component is located at the front end of the main frame, and the rotating component and the fixing component are sequentially located below the second lifting component. The first fixing component can rotate a certain angle on the second lifting component through the rotating component.

[0009] Furthermore, the rotating component includes a rotating shaft, which is fixedly disposed at the upper center of the second lifting component, and the other end of the rotating shaft is rotatably connected to the bottom of the first fixed component;

[0010] The second lifting assembly includes a hinge assembly, a first upper crossbeam, a first middle crossbeam, a first lower crossbeam, a first inner sleeve column, and a first lifting cylinder. The hinge assembly is bolted to the bottom front end of the main frame. The first upper crossbeam is welded to the lower part of the hinge assembly. The lower part of the first upper crossbeam is provided with two column sleeves facing each other, and the first upper crossbeam is provided with square holes at the two column sleeves. The first inner sleeve column is slidably provided in the two square holes of the upper crossbeam. The two ends of the first middle crossbeam are respectively sleeved on the two first inner sleeve columns. The first lifting cylinder is provided between the first middle crossbeam and the first upper crossbeam, and the output end of the first lifting cylinder is connected to the first middle crossbeam. The bottom of the first inner sleeve column is bolted to the first lower crossbeam. The first lower crossbeam is rotatably connected to the fixing assembly through a rotating shaft.

[0011] The first fixing component includes a spreader beam and an anchoring longitudinal beam. There are two anchoring longitudinal beams located at both ends of the spreader beam. The rotating shaft is located at the center of the spreader beam, and the other end of the rotating shaft is rotatably connected to the first lower crossbeam.

[0012] Furthermore, the two transfer trolleys are connected by a connecting rod, and each of the two transfer trolleys is equipped with a longitudinal movement mechanism, which is used to push the main frame longitudinally.

[0013] Furthermore, the two ends of the support leg beam are respectively provided with a lateral movement mechanism, which is used to drive the two shifting trolleys to move laterally on the support leg beam.

[0014] Furthermore, the first lifting assembly includes four lifting units arranged in the left-right direction on the lower side of the outrigger crossbeam. Each lifting unit includes a support crossbeam, two third inner sleeve columns, a third lifting cylinder, a cylinder crossbeam, a bottom crossbeam, and an adjustable support. The support crossbeam is bolted to the lower part of the outrigger crossbeam. The two third inner sleeve columns are inserted at both ends of the support crossbeam. A third lifting cylinder is provided at the center of the bottom of the support crossbeam. The output end of the third lifting cylinder is connected to the cylinder crossbeam. Both ends of the cylinder crossbeam are respectively sleeved on the outside of the two third inner sleeve columns and fixedly connected to them. Both ends of the bottom crossbeam are respectively sleeved on the bottom of the two third inner sleeve columns, and an adjustable support is bolted to the bottom of the bottom crossbeam.

[0015] Furthermore, a cylinder lifting section is provided between the third lifting cylinder and the cylinder crossbeam to increase the lifting distance of the third lifting cylinder. A corresponding outer lifting section is also provided between the third inner sleeve column and the support crossbeam. A scissor brace is provided between the two outer lifting sections in each lifting unit.

[0016] Furthermore, the rear auxiliary support leg includes a third lifting component and a second fixing component, with the third lifting component and the fixing component sequentially located below the rear end of the main frame;

[0017] The third lifting assembly includes a connecting crossbeam, a second upper crossbeam, a second intermediate crossbeam, a second inner sleeve column, and a second lifting cylinder. The second upper crossbeam is located at the rear end of the main frame. Two second inner sleeve columns are inserted into both ends of the second upper crossbeam. The second inner sleeve columns are connected to the connecting crossbeam by diagonal bracing rods. The second lifting cylinder is fixedly mounted on the second upper crossbeam, and the output end of the second lifting cylinder is connected to the second intermediate crossbeam. Both ends of the second intermediate crossbeam are sleeved outside the second inner sleeve columns.

[0018] The second fixing component includes a second lower crossbeam and pads. The two ends of the second lower crossbeam are fixed to the bottom of the two second inner sleeve columns. There are two pads, which are respectively bolted to the bottom of the two ends of the second lower crossbeam.

[0019] Furthermore, the main crane includes a first main crane and a second main crane. Both the first and second main cranes include two first traveling mechanisms, a hoisting mechanism, and a lifting beam assembly. The two first traveling mechanisms are driven by pin gears. The first and second main cranes move along the top of the main frame through the first traveling mechanisms.

[0020] The hoisting winch mechanism is connected to the lifting beam assembly via a wire rope. The lifting beam assembly is equipped with a three-dimensional adjustment device for adjusting the angle of the lifting beam assembly. The lifting beam assembly is also equipped with components for hoisting the front auxiliary outrigger, the rear auxiliary outrigger, and the middle outrigger.

[0021] The second main crane is also equipped with a cantilever beam, and wet joint construction platforms are hung at both ends of the cantilever beam.

[0022] Furthermore, the wet joint construction platform includes a lower frame, an upper frame, struts, tie rods, adjustable struts, horizontal beam struts, and a movable ladder. The lower frame and the upper frame are hinged together by pins, and the lower frame and the upper frame form a stable structure through struts. The upper end of the upper frame is connected to the tie rods through pins. The tie rods, horizontal struts, and adjustable struts are connected by pins to form a stable "P"-shaped structure. There are two sets of this "P"-shaped structure, which are located at both ends of the upper frame. The two sets of the "P"-shaped structure are connected by traction steel bars. The movable ladder is located between the upper frame and the lower frame. The wet joint construction platform can move laterally under the suspension of the second main crane.

[0023] Furthermore, the main frame consists of two truss-type main beams and connecting beams, and the main frame is symmetrical in both the transverse and longitudinal directions.

[0024] The main beam adopts an equilateral triangular double-layer truss structure. A crane track is installed along the top of the upper chord of the two main beams, a hanging track is installed in the middle of the lower chord of the two main beams, and a car stop is installed at the end of the upper chord of the two main beams.

[0025] The connecting beam adopts an inverted triangular truss structure.

[0026] The beneficial effects of this invention are as follows:

[0027] 1. The front auxiliary legs, rear auxiliary legs, and middle legs of the device of this invention have a large range of vertical adjustment, which can adapt to the use of lines with large longitudinal slopes. The moving trolley inside the middle leg can move laterally along the crossbeam of the leg, thus adapting to the use of lines with large transverse slopes. At the same time, the first main crane and the second main crane have a large angle of adjustment for the flatness of the lifting device through the three-dimensional adjustment device, which is more conducive to the equipment adapting to the erection of beams with larger longitudinal and transverse slopes. The moving trolleys of the front auxiliary legs and the middle legs of this invention can rotate at a certain angle, which is more conducive to the equipment adapting to the construction of small curves.

[0028] 2. The traveling mechanism inside the overhead crane of the device of the present invention adopts the toothed pin drive, which makes the crane have good anti-slip function. The toothed pin drive does not require high precision in manufacturing, which is more conducive to its use on bridge erecting machines with complex working conditions and increases the safety of equipment construction.

[0029] 3. The transverse movement mechanism of the device of the present invention adopts a sprocket drive, which makes the transverse movement of the whole machine safer and more efficient, and makes it more convenient for the bridge erecting machine to perform variable amplitude construction.

[0030] 4. The device of the present invention is equipped with a wet joint construction platform, which can be lifted by a second main crane, thereby facilitating the construction of wet joints on bridges. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall T-structure of the present invention;

[0032] Figure 2 This is a schematic diagram of the overall half-span full-load erection of the present invention;

[0033] Figure 3 This is a top view of the main frame in this invention;

[0034] Figure 4 This is the front view of the main frame in this invention;

[0035] Figure 5 For the present invention Figure 4 Sectional view at point AA;

[0036] Figure 6 For the present invention Figure 4 Sectional view at point BB;

[0037] Figure 7 This is a front view of the front auxiliary support leg structure in this invention;

[0038] Figure 8 This is a side view of the front auxiliary support leg structure in this invention;

[0039] Figure 9 This is a schematic diagram of the support leg structure in this invention;

[0040] Figure 10 This is a schematic diagram of the lifting assembly in the outrigger structure of the present invention;

[0041] Figure 11 This is a front view of the rear auxiliary support leg structure in this invention;

[0042] Figure 12 This is a side view of the rear auxiliary support leg structure in this invention;

[0043] Figure 13 This is a front view of the first main crane structure in this invention;

[0044] Figure 14 This is a side view of the first main crane structure in this invention;

[0045] Figure 15 This is a front view of the second main crane structure in this invention;

[0046] Figure 16 This is a side view of the second main crane structure in this invention;

[0047] Figure 17 This is a front view of the auxiliary crane structure in this invention;

[0048] Figure 18 This is a side view of the auxiliary crane structure in this invention;

[0049] Figure 19 This is a schematic diagram of the structure of a single hanging unit in the hanging assembly of the present invention;

[0050] Figure 20 For the present invention Figure 19 Diagram of direction A in the middle;

[0051] Figure 21 For the present invention Figure 19 Diagram of direction B in the middle;

[0052] Figure 22 For the present invention Figure 19 Sectional view at CC;

[0053] Figure 23 This is a schematic diagram of the structure of the wet joint construction platform in this invention;

[0054] Figure 24 This is a schematic diagram of the construction process of the bridge erecting machine construction method in this invention. Figure 1 ;

[0055] Figure 25 This is a schematic diagram of the construction process of the bridge erecting machine construction method in this invention. Figure 2 ;

[0056] Figure 26 This is a schematic diagram of the construction process of the bridge erecting machine construction method in this invention. Figure 3 ;

[0057] Figure 27 This is a schematic diagram of the construction process of the bridge erecting machine construction method in this invention. Figure 4 ;

[0058] Figure 28 This is a schematic diagram of the construction process of the bridge erecting machine construction method in this invention. Figure 5 ;

[0059] Figure 29 This is a schematic diagram of the construction process of the bridge erecting machine construction method in this invention. Figure 6 ;

[0060] Figure 30 This is a schematic diagram of the construction process of the bridge erecting machine construction method in this invention. Figure 7 ;

[0061] Figure 31 This is a schematic diagram of the construction process of the bridge erecting machine construction method in this invention. Figure 8 ;

[0062] Figure 32 This is a schematic diagram of the construction process of the bridge erecting machine construction method in this invention. Figure 9 ;

[0063] Figure 33 This is a schematic diagram of the construction process of the bridge erecting machine construction method in this invention. Figure 10 ;

[0064] Figure 34 This is a schematic diagram of the construction process of the bridge erecting machine construction method in this invention. Figure 10 one;

[0065] Figure 35 This is a schematic diagram of the construction process of the bridge erecting machine construction method in this invention. Figure 10 two;

[0066] Figure 36 This is a schematic diagram of the construction process of the bridge erecting machine construction method in this invention. Figure 10 three;

[0067] Figure 37 This is a schematic diagram of the construction process of the bridge erecting machine construction method in this invention. Figure 10 Four;

[0068] Figure 38 This is a schematic diagram of the construction process of the bridge erecting machine construction method in this invention. Figure 10 five;

[0069] Figure 39 This is a schematic diagram of the construction process of the bridge erecting machine construction method in this invention. Figure 10 six;

[0070] Figure 40 This is a schematic diagram of the construction process of the bridge erecting machine construction method in this invention. Figure 10 seven;

[0071] Figure 41 This is a schematic diagram of the construction process of the bridge erecting machine construction method in this invention. Figure 10 eight;

[0072] Figure 42 This is a schematic diagram of the construction process of the bridge erecting machine construction method in this invention. Figure 10 Nine;

[0073] Figure 43 This is a schematic diagram of the construction process of the bridge erecting machine construction method in this invention. Figure 2 ten;

[0074] Figure 44 This is a schematic diagram of the construction process of the bridge erecting machine construction method in this invention. Figure 2 eleven;

[0075] Figure 45 This is a schematic diagram of the construction process of the bridge erecting machine construction method in this invention. Figure 2 twelve;

[0076] Figure 46 This is a schematic diagram of the construction process of the bridge erecting machine construction method in this invention. Figure 2 Thirteen;

[0077] Figure 47 This is a schematic diagram of the construction process of the bridge erecting machine construction method in this invention. Figure 2 fourteen;

[0078] Figure 48 This is a schematic diagram of the construction process of the bridge erecting machine construction method in this invention. Figure 2 fifteen.

[0079] Among them, 1-main frame, 1a-main beam, 1b-connecting beam, 1c-track square steel, 1d-drive rail, 1e-suspending rail, 1f-vehicle stop, 2-front auxiliary support leg, 2a-hinge assembly, 2b-first upper crossbeam, 2c-column outer sleeve, 2d-first intermediate crossbeam, 2e-first inner column, 2f-first lifting cylinder, 2g-first lower crossbeam, 2h-spreader beam, 2i-rotating shaft, 2j-anchoring longitudinal beam, 2k-threaded steel bar, 3-middle support leg, 3a-shifting platform Vehicle, 3b - longitudinal movement mechanism, 3c - lateral movement mechanism, 3d - connecting rod, 3e - outrigger crossbeam, 3f - support crossbeam, 3g - third inner sleeve column, 3h - outer lifting section, 3i - third lifting cylinder, 3j - cylinder lifting section, 3k - cylinder crossbeam, 3l - adjustable support, 3m - bottom crossbeam, 3n - scissor brace, 3o - anchoring device, 4 - rear auxiliary outrigger, 4a - second inner sleeve column, 4b - second upper crossbeam, 4c - second middle crossbeam, 4d - second lower crossbeam, 4e - pad Block, 4f-connecting crossbeam, 4g-diagonal brace, 4h-second lifting cylinder, 5-first main crane, 5a-crane gantry, 5b-crossbeam assembly, 5c-first traveling mechanism, 5d-lifting hoisting mechanism, 5e-lifting beam assembly, 6-second main crane, 6a-crane gantry, 6b-crossbeam assembly, 6c-first traveling mechanism, 6d-lifting hoisting mechanism, 6e-lifting beam assembly, 6f-first electric hoist, 7-auxiliary crane, 7a-second traveling mechanism, 7b-auxiliary crane Gantry, 7c-5t electric hoist, 7d-10t electric hoist, 7e-counterweight block, 8-tensioning platform, 9-suspension assembly, 9a-long hanger, 9b-transverse beam, 9c-balance beam, 9d-hook, 9e-long crossbeam, 9f-short hanger, 10-wet joint construction platform, 10a-lower frame, 10b-upper frame, 10c-strut, 10d-tie rod, 10e-adjustable strut, 10f-horizontal strut on beam surface, 10g-threaded steel bar, 10h-movable ladder.

[0080] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0081] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0082] like Figure 1-23As shown in the figure, this embodiment discloses a novel segmental assembly bridge erecting machine for the construction of precast segmental beams, including a main frame 1, a front auxiliary leg 2, two sets of middle legs 3, a rear auxiliary leg 4, a first main crane 5, a second main crane 6, an auxiliary crane 7, a tensioning platform 8, a hanging assembly 9, and a wet joint construction platform 10.

[0083] like Figure 1-6 The main frame 1 shown consists of two truss-type main beams 1a and a connecting beam 1b. The main beams 1a adopt an equilateral triangular double-layer truss structure, and the connecting beams 1b adopt an inverted triangular truss structure. The main frame 1 is symmetrical in both the transverse and longitudinal directions. A track square steel 1c is installed along the middle of the top of the upper chord of the two main beams 1a. A drive track 1d for the gear reducer is installed along the top of the upper chord of the two main beams. A suspension track 1e is installed in the middle of the lower chord of the two main beams. A vehicle stop 1f is installed at the end of the upper chord of the two main beams. This main frame adopts a double-layer triangular truss structure and is a fully symmetrical structure, which facilitates the reverse construction of this bridge erecting machine.

[0084] like Figure 1-8 As shown, the front auxiliary support leg 2 is a fixed support leg. Its upper end is hinged to the front end of the main beam 1a, and its lower end is supported on the pier or the temporary support next to the pier. It is not only a temporary support when the bridge erecting machine passes through the span, but also a heavy-duty support when the bridge erecting machine erects the pier top block and the 0# block. The front auxiliary support leg 2 includes a hinge assembly 2a, a first upper crossbeam 2b, a column outer sleeve 2c, a first middle crossbeam 2d, a first inner column 2e, a first lifting cylinder 2f, a first lower crossbeam 2g, a spreader beam 2h, a rotating shaft 2i, and an anchoring longitudinal beam 2j. The hinge assembly 2a, the first upper crossbeam 2b, the first middle crossbeam 2d, the first inner column 2e, the first lifting cylinder 2f, and the first lower crossbeam 2g form the second lifting assembly, the rotating shaft 2i forms the rotating assembly, and the spreader beam 2h and the anchoring longitudinal beam 2j form the first fixed assembly.

[0085] like Figure 1-8 As shown, the upper part of the hinge assembly 2a is bolted to the bottom of the lower chord of the main beam 1a. The lower part of the hinge assembly 2a is directly welded to the first upper crossbeam 2b. The lower part of the first upper crossbeam 2b is welded to the column outer sleeve 2c to form an integral frame. Square holes are opened in the welding area of ​​the first upper crossbeam 2b in the column outer sleeve 2c. The first intermediate crossbeam 2d is connected to the first inner sleeve column 2e by a pin. The first lifting cylinder 2f is connected between the first upper crossbeam 2b and the first intermediate crossbeam 2d. The lower part of the first inner sleeve column 2e is bolted to the first lower crossbeam 2g. A rotating shaft 2i is set between the first lower crossbeam 2g and the spreader beam 2h. The spreader beam 2h can rotate along the rotating shaft 2i on the first lower crossbeam 2g. The spreader beam 2h is supported on the anchoring longitudinal beam 2j. The anchoring longitudinal beam 2j is connected to the pre-embedded threaded steel bar 2k at the top of the pier.

[0086] like Figure 1-10 As shown, there are two sets of middle support legs 3 with identical structures. These are movable support legs. The upper end of the middle support leg 3 is slidably supported on the lower chord of the main beam 1a, and the lower end is supported on the pier top block and #0 block via adjustable support 3l. The middle support leg 3 is a heavy-duty support during bridge erection by the bridge erecting machine. It also works in conjunction with the front auxiliary support leg 2 and the rear auxiliary support leg 4 to complete the equipment passage through the opening. Each set of middle support legs 3 includes two shifting trolleys 3a, a longitudinal shifting mechanism 3b, a transverse shifting mechanism 3c, a connecting rod 3d, a support leg crossbeam 3e, and a support... The first lifting assembly consists of a support beam 3f, two third inner sleeve columns 3g, an outer lifting section 3h, a third lifting cylinder 3i, a cylinder lifting section 3j, a cylinder beam 3k, an adjustable support 3l, a bottom beam 3m, a scissor brace 3n, and an anchoring device 3o. Two shifting trolleys 3a and a support leg beam 3e form a support assembly. The support beam 3f, the two third inner sleeve columns 3g, the third lifting cylinder 3i, the cylinder beam 3k, and the adjustable support 3l form a single lifting unit within the first lifting assembly.

[0087] like Figure 1-10 There are two shifting trolleys 3a. The longitudinal shifting mechanism 3b is set on the shifting trolley 3a. The shifting trolley 3a is supported on the bottom of the lower chord of the single main beam 1a by the longitudinal shifting mechanism 3b. In this embodiment, the longitudinal shifting mechanism is the prior art. It can push the main beam 1a on the main frame 1 to move forward. Each shifting trolley 3a is divided into an upper part and a lower part. The lower part of the shifting trolley 3a is set on the support leg beam 3e. The upper part of the shifting trolley 3a is supported on the bottom of the lower chord of the single main beam 1a by the longitudinal shifting mechanism 3b. The upper part of the shifting trolley can rotate along the central axis of the lower part of the shifting trolley. An anchor is provided between the shifting trolley 3a and the lower chord of the main beam 1a. In the bridge erecting machine beam erection operation, this anchoring mechanism needs to be installed in place. A connecting rod 3d is set between the two shifting trolleys 3a.

[0088] The lateral movement mechanism 3c is located at one end of the support leg beam 3e. The lateral movement mechanism 3c is driven by a sprocket. The lateral movement mechanism 3c is equipped with a chain and a drive wheel that meshes with the chain. The other end of the support leg beam 3e is equipped with a driven wheel that meshes with the chain. The lateral movement mechanism 3c drives the drive wheel to rotate, thereby moving the chain. At the same time, the shifting trolley 3a is located on the chain. That is, when the lateral movement mechanism 3c moves the chain, it also moves the shifting trolley 3a laterally on the support leg beam 3e.

[0089] The support beam 3f is bolted to the bottom of the outrigger beam 3e. A single middle outrigger 3 has four support beams 3f. Each support beam 3f is connected to two third inner sleeve columns 3g via pins. An outer sleeve extension section 3h is installed between the support beam 3f and the third inner sleeve columns 3g. The outer sleeve extension section 3h is connected to the support beam 3e via flange bolts, and to the inner sleeve columns 3g via pins. The top of the third lifting cylinder 3i is bolted to the bottom of the support beam 3e, and the bottom is bolted to the top of the cylinder beam 3k. Between the third lifting cylinder 3i and the cylinder beam 3k... The system is equipped with a hydraulic cylinder extension section 3j, and a hydraulic cylinder crossbeam 3k connected to two third inner sleeve columns 3g via pins in the form of an outer sleeve column. There are four single-leg support pieces, with each single bottom crossbeam 3m connected to the two third inner sleeve columns 3g via flange bolts. An adjustable support 3l is bolted to the bottom of each single bottom crossbeam 3m, and a scissor brace 3n is pinned to the outer sleeve extension section 3h to increase the lateral stability of the support leg in the high position. An anchoring device 3o is bolted to the support leg crossbeam 3e and can be fixed at different positions on the support leg crossbeam 3e. The bottom of the anchoring device 3o is connected to the pier top block.

[0090] like Figure 11-12 As shown, the rear auxiliary support leg of the present invention mainly includes a second inner sleeve column 4a, a second upper crossbeam 4b, a second middle crossbeam 4c, a second lower crossbeam 4d, a pad block 4e, a connecting crossbeam 4f, a diagonal brace 4g, and a second lifting cylinder 4h. The second inner sleeve column 4a, the second upper crossbeam 4b, the second middle crossbeam 4c, the connecting crossbeam 4f, and the second lifting cylinder 4h form a third lifting assembly, while the second lower crossbeam 4d and the pad block 4e form a second fixing assembly.

[0091] like Figure 1-12 As shown, the connecting beam 4f is formed by welding four I-shaped crossbeams into an integral frame, which is bolted to the lower chord of the main beam 1a, and forms an integral unit with the second inner sleeve column 4a and the diagonal brace 4g. The upper part of the second upper beam 4b is hinged to the connecting beam 4f, and its two sides are connected to the second inner sleeve column 4a by pins. It is bolted to the second lifting cylinder 4h in the middle. The two sides of the second middle beam 4b are connected to the second inner sleeve column 4a by pins, and its middle is bolted to the second lifting cylinder 4h. The upper part of the second lower beam 4d is connected to the second inner sleeve column 4a by flange bolts, and the lower part is connected to the pad 4e by bolts. The pad 4e is directly supported on the concrete beam surface.

[0092] like Figure 1-14As shown, the first main crane 5 in this invention includes a crane gantry 5a, a crossbeam assembly 5b, a first traveling mechanism 5c, a hoisting mechanism 5d, and a lifting beam assembly 5e. The hoisting mechanism 5d is fixed on the crossbeam assembly 5b, and the crossbeam assembly 5b is slidably disposed on the crossbeam of the crane gantry 5a. The crossbeam assembly 5b and the crane gantry 5a can slide relative to each other. The hoisting mechanism 5d is connected to the lifting beam assembly 5e via a wire rope. The crane lifting beam assembly 5e is equipped with a three-dimensional adjustment device. In this embodiment... The three-dimensional adjustment device is existing technology and can adjust the lifting beam assembly 5e at multiple angles. The crane lifting beam assembly 5e is also equipped with components for lifting the front auxiliary support leg 2, the middle support leg 3 and the rear auxiliary support leg 4. The first traveling mechanism 5c consists of four wheel boxes and is hinged to the crane gantry 5a by pin shafts. The first traveling mechanism 5c consists of four wheel boxes and adopts toothed pin transmission. The braking adopts motor braking. The first traveling mechanism 5c is located in the drive rail 1d of the upper chord of the main beam 1a inside the main frame 1.

[0093] like Figure 15-16 As shown, the second main crane 6 in this invention has a basically the same structure as the first main crane 5. The difference is that the crane gantry 6a of the second main crane 6 is equipped with a cantilever beam and two 5t first electric hoists 6f are provided at both ends of the cantilever beam for hoisting the wet joint construction platform.

[0094] like Figure 1-18 As shown, in this invention, there are two sets of auxiliary cranes 7, which are respectively arranged at the front and rear ends of the first main crane 5 and the second main crane 6. The auxiliary crane 7 includes a second traveling mechanism 7a, an auxiliary crane gantry 7b, a 5t electric hoist 7c, a 10t electric hoist 7d, and a counterweight 7e. The traveling mechanism 7a consists of two sets of traveling wheel boxes, which act on the drive rails 1d of the upper chord of the two main beams 1a of the main frame 1. The traveling mechanism 7a is driven by pin gear transmission and braked by electric motor. The auxiliary crane gantry 7b consists of a box-shaped main beam and four support columns. The upper and lower ends of the support columns are connected to the main beam of the gantry and the traveling wheel boxes, respectively, forming a stable triangular structure along the bridge. The crane gantry 7b is provided with rails for the 10t hoist 7d and two 5t hoists 7c to run on. The crane gantry 7b is provided with a counterweight 7e to ensure the stability of the auxiliary crane 7 itself when the 10t hoist 7d is hoisted.

[0095] like Figure 1-22As shown, the suspension mechanism 9 in this invention consists of multiple suspension units. Each suspension unit includes a long suspension rod 9a, a transverse beam 9b, a balance beam 9c, a hook 9d, a long crossbeam 9e, and a short suspension rod 9f. There are four long suspension rods 9a, the upper part of which is connected to the suspension track 1e of the lower chord of the main beam 1a and can move longitudinally along the groove of the suspension track 1e. The lower part of every two long suspension rods 9a is connected to the transverse beam 9b and the balance beam 9c, respectively. The two sides of the transverse beam 9b are directly hooked to the ear beams on both sides of the lower crossbeam 9e. The balance beam 9c is hinged to the hook 9d through a pin. The hook 9d mechanism is directly hooked to the ear beam of the lower crossbeam 9e, thus forming a stable form of four-point lifting and three-point balance.

[0096] like Figure 23 As shown, the wet joint construction platform 10 of this invention includes a lower frame 10a, an upper frame 10b, struts 10c, tie rods 10d, adjustable struts 10e, horizontal beam struts 10f, threaded steel bars 10g, and a movable ladder 10h. The lower frame 10a is a rectangular truss structure welded from steel profiles and plates, consisting of two pieces connected by flange bolts. A single lower frame 10a and a single upper frame 10b are hinged by pins. Multiple struts 10c are arranged between the upper frame 10b and the lower frame 10a, thereby enabling the upper frame to... The frame and the lower frame form a stable structure. The upper end of the upper frame 10b is connected to the tie rod 10d by a pin. The tie rod 10d, the horizontal support rod and the adjustable support rod 10e are connected by pins to form a stable "P"-shaped structure. The two sets of "P"-shaped structures are directly hung on the concrete beam surface. The upper and lower parts of the two sets of "P"-shaped structures are connected by bolts and steel bars 10f. The movable ladder is directly hooked on the lower frame 10a and the upper frame 10b to facilitate personnel going up and down. The wet joint construction platform can be moved laterally under the suspension of the second main crane.

[0097] In use, the front auxiliary support leg 2 has a large vertical adjustment range because the first lifting cylinder 2f is adjusted, which drives the first inner sleeve column 2e to move through the first intermediate crossbeam 2d. The middle support leg 3 has a large vertical adjustment range because the third lifting cylinder 3i, the cylinder extension section 3j, and the outer extension section 3h work together to drive the cylinder crossbeam 3k to move the third inner sleeve column 3g. The number of cylinder extension sections 3j and outer extension sections 3h can be adjusted according to the specific construction conditions to further increase the vertical adjustment range of the middle support leg. The rear auxiliary support leg 4 has a large vertical adjustment range because the second lifting cylinder 4h is adjusted, which drives the second lower crossbeam 4c to move the second inner sleeve column 4a. This allows the equipment to adapt to the use of lines with large longitudinal slopes.

[0098] The chain on the control transverse movement mechanism 3c of the middle support leg 3 moves, thereby driving the shifting trolley 3a to move along the chain on the support leg crossbeam 3e, thus realizing the transverse movement of the middle support leg, and thus enabling the equipment to adapt to the use of lines with large cross slopes.

[0099] By manually controlling the first lower crossbeam 2g to rotate along the pivot 2i on the spreader beam 2h, the front auxiliary support leg can rotate at a small angle. By controlling the shifting trolley 3a to rotate at a certain angle, the middle support leg can rotate at a small angle, which is more conducive to the equipment adapting to small curve construction.

[0100] Taking the construction of a bridge with three spans as a unit as an example, the specific usage of this bridge erecting machine includes the following steps:

[0101] (i) The first span of the bridge erecting machine is in place, the two middle support legs 3 are supported on the pier top block, the front auxiliary support leg 2 and the rear auxiliary support leg 4 are detached, and the bridge erecting machine is ready to erect the beam.

[0102] (ii) The first main crane 5 and the second main crane 6 lift the first segment beam to both sides of the middle support leg 3 in front of the construction site in sequence. After initial alignment, the elevation and the aerial posture of the segment block are adjusted. Then the wet joint size is adjusted, and fine alignment is carried out. Temporary prestressing tensioning, installation of wet joint template between the T structure and the T structure are completed in sequence, and wet joint is poured. After the wet joint reaches the design strength, the internal permanent prestressing steel strand tensioning is carried out.

[0103] (III) Repeat step (II) to erect the T-structure of the pier where the middle support leg 3 is located in the front of the construction in sequence, and continue until the last pair of segment beams of the middle span T-structure are assembled.

[0104] (iv) After the first T-structure of each section is erected, the first side span segment beam suspension construction is carried out. The specific construction steps are as follows: (1) The segment beam suspension sequence is from the side to the middle of the span, (2) The beam is transported to the position and the suspending rod is installed. The first main crane 5 is controlled to lift the beam. At the same time, the suspending rod and the hanging are used to suspend the segment beam block on the main frame 1. The above steps are repeated until the first span segment beam is completely suspended and assembled. (3) The first main crane 5 is used to adjust the segment beam in three-dimensional space and perform initial alignment. Then epoxy resin is applied. Then precise alignment is performed and temporary prestressing is performed. Then wet joint template is installed and wet joint is poured. Then permanent stress steel strand tensioning of the whole span is performed. (4) After the whole span tensioning is completed, the hanging is unloaded and the hanging is removed.

[0105] (v) The first main crane 5 and the second main crane 6 travel to the vicinity above the two middle support legs 3, respectively, and drive the middle support leg 3 lateral movement mechanism 3c to adjust the main frame of the bridge erecting machine to a suitable position before the span. The specific steps include: (1) The middle support leg lateral movement mechanism 3a drives the whole machine to lateral movement by a certain distance so that the main frame 1 at one middle support leg moves laterally to the target position; (2) Taking the center line of the shifting trolley 3f of one middle support leg at the target position of the main frame 1 as the pivot, the lateral movement mechanism 3a of the other middle support leg continues to carry the main frame 1 laterally to the target position; (3) During the process of the lateral movement mechanism 3a driving the whole machine to lateral movement, the angle between the support leg beam 3e and the main frame 1 will change, and the distance between the two shifting trolleys 3f of a single middle support leg 3 on the support leg beam 3e will change. Therefore, after the lateral movement mechanism 3a of the middle support leg 3 drives the whole machine to lateral movement by a certain distance, the connecting rod 3d between the two shifting trolleys 3a needs to be released, the length of the connecting rod 3g is adjusted, and the shifting trolleys 3a are connected. After the connecting rod 3d is connected, the machine continues to move laterally. This is repeated several times until the target lateral movement is achieved.

[0106] (vi) The first main crane 5, the second main crane 6 and the auxiliary crane 7 move to the tail of the bridge erecting machine and use the longitudinal movement mechanism 3b of the middle support leg 3 to push the main frame forward until the front auxiliary support leg 2 reaches the top of the front pier block. When the bridge erecting machine passes through the hole in the curved section and the front auxiliary support leg 2 is in place on the front pier top or the pier side support, the following steps are required: (1) When the front auxiliary support leg 2 reaches the center of the pier top, release the bolt connection between the upper and lower crossbeams at the lower end of the front auxiliary support leg 2. (2) Drive the lower crossbeam to rotate, so that the lower crossbeam of the front auxiliary support leg 2 is basically parallel to the pier or the pier side support. Reconnect the bolts between the two crossbeams. (3) Continue to move forward to the position and support it on the anchoring longitudinal beam 2j or the pier side support. (4) Effectively anchor the lower crossbeam of the front auxiliary support leg 2 to the anchoring longitudinal beam 2j or the pier side support to prevent it from sliding.

[0107] (vii) Simultaneously support the front auxiliary leg 2 and the rear auxiliary leg 4, detach the rear middle support leg 3, and the first main crane 5 lifts the rear middle support leg 3 to the top of the pier behind the front auxiliary leg 2, supports the rear middle support leg 3, and installs the anchoring device on the top of the pier for the rear middle support leg 3. The first main crane 5 should lift the rear middle support leg 3 through the hole according to the following steps: (1) The front auxiliary crane 2 travels to the front end of the main frame 1, (2) the lifting device of the first main crane 5 is connected to the rear middle support leg 4. (3) The first main crane 5 lifts the rear middle support leg 3 to disengage. (4) The first main crane 5 lifts the rear middle support leg 3 and moves forward to the middle position of the rear span. The first main crane 5 drives the middle support leg 3 to rotate 90° clockwise and then continues to move forward. (5) The first main crane 5 lifts the rear middle support leg 3 to the middle position of the front span and lands and rotates 90° counterclockwise. (6) The first main crane 5 lifts the rear middle support leg 3 and continues to move forward to the top of the pier behind the front auxiliary support leg.

[0108] (viii) After the front auxiliary leg 2 and rear auxiliary leg 4 are removed, the first main crane 5, the second main crane 6 and the auxiliary crane 7 move to the front end of the bridge erecting machine. The main frame is pushed forward by the longitudinal movement mechanism 3b of the middle support leg 3 until the main frame 1 moves forward to the beam erecting position. The bridge erecting machine is ready to pass through the span again.

[0109] (ix) Repeat steps (ii) to (iii) to complete the "T" structure erection of the intermediate pier of the bridge;

[0110] (x) The first main crane 5 and the second main crane 6 are respectively moved to the vicinity above the front and rear middle support legs 3, and the middle support leg 3 is driven to move the transverse mechanism 3c to adjust the main frame 1 of the bridge erecting machine to a suitable position before the hole, in preparation for the final span of the span to pass through the hole. The specific implementation steps are the same as those in step (v).

[0111] (xi) The first main crane 5, the second main crane 6 and the auxiliary crane 7 move to the tail of the bridge erecting machine. The longitudinal movement mechanism 3b of the middle support leg 3 pushes the main frame forward until the front auxiliary support leg 2 reaches the support frame above the pier and is supported on the pier support. The specific implementation steps are the same as in step (vi).

[0112] (12) Use the first main crane 5 to place a segment beam on the top of the side span pier. The first main crane 5 should place a segment beam on the top of the side span pier in place according to the following steps: (1) The front auxiliary crane 2 moves to the front end of the main frame 1, and the first main crane 5 moves forward about 20m. (2) At the same time, use the second main crane 6 to move the rear auxiliary support leg 4 forward to the back of the middle support leg 3, and temporarily suspend it on the lower chord of the main frame 1 with threaded steel bars. (3) Use the second main crane 6 The segmental beam is moved to the span of the two middle legs and placed on the bridge deck. (4) The second main crane 6 returns to the tail of the main frame 1 to continue picking up the beam. The lifting device of the first main crane 5 is reconnected to the segmental beam in the span. (5) The segmental beam is moved to the vicinity of the front span pier using the first main crane 5. (6) The first main crane 5 rotates the segmental beam 90 degrees. (7) The first main crane 5 places the first half of the segmental beam on the top of the pier into place. (8) The segmental beam is temporarily supported and fixed to the pier.

[0113] (XIII) Repeat step (XII) to install the other segment beam on the pier top and temporarily anchor the two pier top blocks to ensure that they can meet the support requirements of the middle support leg 3.

[0114] (XIV) Support the rear auxiliary leg 4 and detach the rear middle support leg 3. Specifically, follow these steps: (1) The second main crane 6 runs to the tail of the main frame. The second main crane 6 is used to move the rear auxiliary leg 4 backward to a suitable position and bolt it to the lower chord of the main frame to support the rear auxiliary leg 4. (2) Connect the hoisting device of the first main crane 5 and the rear middle support leg 3. The first main crane 5 lifts the rear middle support leg 3 to detach it.

[0115] (XV) The first main crane 5 lifts the rear middle support leg 3 to the top of the pier behind the front auxiliary support leg 2. The specific steps for lifting the rear middle support leg through the hole are the same as the steps for passing through the hole in step (VII). Control the first main crane 5, the second main crane 6 and the auxiliary crane 7 to run to the front end of the bridge erecting machine, and detach the front auxiliary support leg 2 and the rear auxiliary support leg 4. The bridge erecting machine is ready to pass through the hole again.

[0116] (xvi) Using the longitudinal movement mechanism 3b of the middle support leg 3 to push the main frame forward to the beam erection position, construct the last span of the first section, pour the intermediate wet joint, and tension the permanent stress steel strands of the entire span, thus completing the construction of the first section.

[0117] In the description of this invention, it should be understood that the terms "center", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of this invention and to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0118] If the terms "first" or "second" are used in this document to define components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing the invention and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0119] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A novel segmental bridge erection machine for precast segmental beam construction, comprising a main frame, front auxiliary legs, rear auxiliary legs, two middle legs, a main gantry crane, and auxiliary gantry cranes, wherein the main gantry crane and auxiliary gantry cranes are mounted on the main frame and can move along the main frame, and the front auxiliary legs and rear auxiliary legs are respectively located at the front and rear ends of the main frame, characterized in that... Both of the aforementioned middle support legs include a support assembly and a first lifting assembly. The first lifting assembly is located below the support assembly. The middle support legs are slidably located below the main frame via the support assembly. The support assembly mainly consists of two shifting trolleys and a support leg crossbeam. The shifting trolleys are divided into an upper part and a lower part. The lower part of the shifting trolley is located on the support leg crossbeam, and the upper part of the shifting trolley is connected to the main frame. The upper part of the shifting trolley can rotate along the central axis of the lower part of the shifting trolley. The front auxiliary support leg includes a second lifting component, a rotating component, and a first fixing component. The second lifting component is located at the front end of the main frame, and the rotating component and the fixing component are sequentially located below the second lifting component. The first fixing component can rotate a certain angle on the second lifting component through the rotating component. The rotating component includes a rotating shaft, which is fixedly disposed at the upper center of the second lifting component, and the other end of the rotating shaft is rotatably connected to the bottom of the first fixed component; The second lifting assembly includes a hinge assembly, a first upper crossbeam, a first middle crossbeam, a first lower crossbeam, a first inner sleeve column, and a first lifting cylinder. The hinge assembly is bolted to the bottom front end of the main frame. The first upper crossbeam is welded to the lower part of the hinge assembly. The lower part of the first upper crossbeam is provided with two column sleeves facing each other, and the first upper crossbeam is provided with square holes at the two column sleeves. The first inner sleeve column is slidably provided in the two square holes of the upper crossbeam. The two ends of the first middle crossbeam are respectively sleeved on the two first inner sleeve columns. The first lifting cylinder is provided between the first middle crossbeam and the first upper crossbeam, and the output end of the first lifting cylinder is connected to the first middle crossbeam. The bottom of the first inner sleeve column is bolted to the first lower crossbeam. The first lower crossbeam is rotatably connected to the fixing assembly through a rotating shaft. The first fixing component includes a spreader beam and an anchoring longitudinal beam. There are two anchoring longitudinal beams located at both ends of the spreader beam. The rotating shaft is located at the center of the spreader beam, and its other end is rotatably connected to the first lower crossbeam. The two transfer trolleys are connected by a connecting rod, and each of the two transfer trolleys is equipped with a longitudinal movement mechanism, which is used to push the main frame longitudinally.

2. The novel segmental assembly and erection bridge machine for precast segmental beam construction according to claim 1, characterized in that, The support leg beam is equipped with a lateral movement mechanism at both ends. The lateral movement mechanism is driven by a sprocket and is used to drive two transfer trolleys to move laterally on the support leg beam.

3. A novel segmental assembly and erection bridge machine for precast segmental beam construction according to claim 2, characterized in that, The first lifting assembly includes four lifting units arranged in the left-right direction on the lower side of the outrigger crossbeam. Each lifting unit includes a support crossbeam, two third inner sleeve columns, a third lifting cylinder, a cylinder crossbeam, a bottom crossbeam, and an adjustable support. The support crossbeam is bolted to the lower part of the outrigger crossbeam. The two third inner sleeve columns are inserted at both ends of the support crossbeam. A third lifting cylinder is provided at the center of the bottom of the support crossbeam. The output end of the third lifting cylinder is connected to the cylinder crossbeam. Both ends of the cylinder crossbeam are respectively sleeved on the outside of the two third inner sleeve columns and fixedly connected to them. Both ends of the bottom crossbeam are respectively sleeved on the bottom of the two third inner sleeve columns, and an adjustable support is bolted to the bottom of the bottom crossbeam.

4. A novel segmental assembly and erection bridge machine for precast segmental beam construction according to claim 3, characterized in that, A cylinder lifting section is provided between the third lifting cylinder and the cylinder crossbeam to increase the lifting distance of the third lifting cylinder. A corresponding outer lifting section is also provided between the third inner sleeve column and the support crossbeam. A scissor brace is provided between the two outer lifting sections in each lifting unit.

5. A novel segmental assembly and erection bridge machine for precast segmental beam construction according to claim 1, characterized in that, The rear auxiliary support leg includes a third lifting component and a second fixing component, which are sequentially located below the rear end of the main frame. The third lifting assembly includes a connecting crossbeam, a second upper crossbeam, a second intermediate crossbeam, a second inner sleeve column, and a second lifting cylinder. The second upper crossbeam is located at the rear end of the main frame. Two second inner sleeve columns are inserted into both ends of the second upper crossbeam. The second inner sleeve columns are connected to the connecting crossbeam by diagonal bracing rods. The second lifting cylinder is fixedly mounted on the second upper crossbeam, and the output end of the second lifting cylinder is connected to the second intermediate crossbeam. Both ends of the second intermediate crossbeam are sleeved outside the second inner sleeve columns. The second fixing component includes a second lower crossbeam and pads. The two ends of the second lower crossbeam are fixed to the bottom of the two second inner sleeve columns. There are two pads, which are respectively bolted to the bottom of the two ends of the second lower crossbeam.

6. A novel segmental assembly and erection bridge machine for precast segmental beam construction according to claim 1, characterized in that, The main crane includes a first main crane and a second main crane. Both the first and second main cranes include two first traveling mechanisms, a hoisting mechanism, and a lifting beam assembly. The two first traveling mechanisms are driven by pin gears. The first and second main cranes move along the top of the main frame through the first traveling mechanisms. The hoisting winch mechanism is connected to the lifting beam assembly via a wire rope. The lifting beam assembly is equipped with a three-dimensional adjustment device for adjusting the angle of the lifting beam assembly. The lifting beam assembly is also equipped with components for hoisting the front auxiliary outrigger, the rear auxiliary outrigger, and the middle outrigger. The second main crane is also equipped with a cantilever beam, and wet joint construction platforms are hung at both ends of the cantilever beam.

7. A novel segmental assembly and erection bridge machine for precast segmental beam construction according to claim 6, characterized in that, The wet joint construction platform includes a lower frame, an upper frame, struts, tie rods, adjustable struts, horizontal beam struts, and a movable ladder. The lower frame and the upper frame are hinged together by pins, and the lower frame and the upper frame are connected by struts to form a stable structure. The upper end of the upper frame is connected to the tie rod by a pin. The tie rod, horizontal struts, and adjustable struts are connected by pins to form a stable "P"-shaped structure. There are two sets of this "P"-shaped structure, which are located at both ends of the upper frame. The two sets of the "P"-shaped structure are connected by traction steel bars. The movable ladder is located between the upper frame and the lower frame. The wet joint construction platform can move laterally under the suspension of the second main crane.

8. A novel segmental assembly and erection bridge machine for precast segmental beam construction according to claim 1, characterized in that, The main frame consists of two truss-type main beams and connecting beams, and the main frame is symmetrical in both the transverse and longitudinal directions. The main beam adopts an equilateral triangular double-layer truss structure. A crane track is installed along the top of the upper chord of the two main beams, a hanging track is installed in the middle of the lower chord of the two main beams, and a car stop is installed at the end of the upper chord of the two main beams. The connecting beam adopts an inverted triangular truss structure.

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