A horizontal rotation construction method of a steel truss girder bridge

Abstract

The application relates to the field of steel truss bridge construction technology, and discloses a horizontal rotating construction method for a steel truss girder bridge, which comprises the following steps: S1, lower bearing platform construction, pouring foundation piles in a foundation pit, and then pouring the lower bearing platform on the foundation piles; S2, lower spherical hinge construction, erecting a lower spherical hinge on the lower bearing platform, erecting a slide on the periphery of the lower spherical hinge, and penetrating a pin shaft at the axis position of the lower spherical hinge; S3, upper spherical hinge construction, hoisting the upper spherical hinge and aligning the upper spherical hinge with the pin shaft, then placing the upper spherical hinge on the lower spherical hinge, and inserting the upper spherical hinge on the pin shaft; S4, upper bearing platform construction, arranging a jacking mechanism on the slide, erecting a pouring formwork on the jacking mechanism, then pouring reinforced concrete on the upper spherical hinge, and forming the upper bearing platform; S5, bridge assembly; S6, bridge turning; and S7, bridge closure. The application has the effect of reducing the influence of the river channel or the driving lane and guaranteeing the traffic capacity of the river channel or the driving lane by constructing on one side of the river channel or the driving lane.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of steel truss bridge construction technology, in particular to a steel truss girder bridge horizontal rotation construction method. BACKGROUND

[0002] With the continuous development of urban construction, more and more large-span bridges of various types of cities crossing rivers, crossing rivers and crossing major traffic arteries and waterways are being built, especially the development of steel truss structure bridges is relatively rapid. Steel truss girder bridge has the advantages of large span, fast construction speed, and easy industrialization manufacturing, and with the improvement of steel strength, toughness, weldability and other material properties and quality, steel truss structure bridge has developed rapidly.

[0003] At present, the existing steel truss girder bridge construction is mostly carried out by hoisting and splicing. The construction personnel first set up a temporary support on the construction river or road, then transport each part of the steel truss girder bridge to the construction site, and the construction personnel splices each part of the steel truss girder bridge on the temporary support, and fixes each part by welding and high-strength bolts to form a steel truss girder bridge, and finally the temporary support is removed.

[0004] For the related technology in the above, the inventor found that in the process of constructing the steel truss girder bridge, in order to ensure the safety of the construction, the river or road is usually blocked, and the river or road is opened after the construction is completed, thereby the steel truss girder bridge in the construction process is prone to cause the traffic inconvenience of the river or road below. SUMMARY

[0005] In order to alleviate the problem that the steel truss girder bridge in the construction process is prone to cause the traffic inconvenience of the river or road below, the present application provides a steel truss girder bridge horizontal rotation construction method.

[0006] The steel truss girder bridge horizontal rotation construction method provided by the present application adopts the following technical scheme:

[0007] A steel truss girder bridge horizontal rotation construction method, comprising the following steps:

[0008] S1: lower pile construction, excavating a foundation pit at the construction position, pouring a foundation pile in the foundation pit, and then pouring a lower pile on the foundation pile;

[0009] S2: lower spherical hinge construction, setting a lower spherical hinge on the lower pile, setting a slide on the side of the lower spherical hinge, and setting a pin shaft at the axis position of the lower spherical hinge, and then pouring reinforced concrete between the lower spherical hinge and the slide to complete the construction and fixation of the lower spherical hinge and the slide;

[0010] S3: upper ball hinge construction, the upper ball hinge is lifted and aligned with the pin shaft, then the upper ball hinge is placed on the lower ball hinge and inserted on the pin shaft;

[0011] S4: upper bearing platform construction, setting a top support mechanism on the slide, and setting a pouring formwork on the top support mechanism, then pouring reinforced concrete on the upper ball hinge to form an upper bearing platform;

[0012] S5: bridge assembly, pouring reinforced concrete on the upper bearing platform to form a main pier, and setting temporary supports on both sides of the main pier, then splicing a steel truss girder bridge on the main pier and the temporary supports;

[0013] S6: bridge turning, installing a tensioning jack on the lower bearing platform and winding a steel strand on the upper bearing platform, driving the upper bearing platform to rotate by the tensioning jack pulling the steel strand to realize the turning of the steel truss girder bridge;

[0014] S7: bridge closure, sliding the steel truss girder bridge on the main pier, setting a dragging mechanism on the main pier, the dragging mechanism being connected with the tensioning jack, the tensioning jack and the dragging mechanism jointly pulling the steel truss girder bridge to move and close with the upper section of the bridge deck, completing the construction.

[0015] By adopting the above technical scheme, the lower ball hinge and the upper ball hinge are arranged between the upper bearing platform and the lower bearing platform, when the steel truss girder bridge is constructed, the construction personnel can assemble and fix the steel truss girder bridge on one side of the river channel or the driving lane, temporarily constructing the steel truss girder bridge on the main pier and the temporary supports, then driving the main pier to rotate by rotating the upper bearing platform through the tensioning jack, the main pier rotating to drive the steel truss girder bridge to rotate, so that the steel truss girder bridge completes horizontal turning, and the construction of the steel truss girder bridge is completed, the construction position is located on one side of the river channel or the driving lane in the construction process, reducing the possibility of affecting the river channel or the driving lane, and ensuring the traffic capacity of the river channel or the driving lane.

[0016] Preferably, the upper surface of the lower ball hinge is provided with a plurality of polytetrafluoroethylene sliding sheets, and the upper surface of the lower ball hinge and the plurality of polytetrafluoroethylene sliding sheets are coated with lubricating oil.

[0017] By adopting the above technical scheme, the plurality of polytetrafluoroethylene sliding sheets are used to make a certain gap exist between the upper ball hinge and the lower ball hinge, and the friction coefficient between the lower ball hinge and the upper ball hinge is reduced under the joint action of the lubricating oil, so as to facilitate the rotation of the main pier and the steel truss girder bridge.

[0018] Preferably, the upper spherical hinge is provided with a fixing mechanism, the fixing mechanism comprises a hydraulic cylinder, a supporting ring and a plurality of fixing rods, the hydraulic cylinder is fixedly connected to the upper spherical hinge, the supporting ring is sleeved outside the upper spherical hinge and is in sliding connection with the upper spherical hinge, and the plurality of fixing rods are fixedly connected to the supporting ring.

[0019] By adopting the above technical scheme, the supporting ring is fixedly connected to the hydraulic cylinder, after the upper spherical hinge is installed on the lower spherical hinge, the hydraulic cylinder is driven to drive the supporting ring to move downward, so that the fixing rod is inserted into the corresponding fixing hole, the upper spherical hinge is locked, the stability of the upper bearing platform and the main pier during pouring construction is ensured, and the safety of construction is ensured; when the bridge is horizontally rotated, the piston rod of the hydraulic cylinder drives the supporting ring and the fixing rod on the supporting ring to move upward, the locking of the upper spherical hinge is released, and the steel truss girder bridge can be horizontally rotated; after the bridge is rotated, the hydraulic cylinder is started again, the hydraulic cylinder drives the fixing rod to be inserted into another fixing hole, and then the upper spherical hinge is fixed, and the stability of the steel truss girder bridge after rotation is ensured.

[0020] Preferably, a sealing ring is fixedly connected to the supporting ring, the sealing ring is attached to the outside of the upper spherical hinge, and the sealing ring seals the gap between the lower spherical hinge and the upper spherical hinge.

[0021] By adopting the above technical scheme, when the hydraulic rod drives the supporting ring to move downward to insert the fixing rod into the fixing hole, the sealing ring is also driven to move downward, so that the sealing ring blocks the gap between the upper spherical hinge and the lower spherical hinge, and the possibility of sand and stones entering the gap between the upper spherical hinge and the lower spherical hinge during construction is reduced.

[0022] Preferably, the pin shaft is hollow, a communication pipe is cast in the lower bearing platform, the communication pipe is in communication with the inside of the pin shaft, a through hole is formed in the side wall of the pin shaft, the through hole is in communication with the gap between the lower spherical hinge and the upper spherical hinge, one end of the communication pipe away from the pin shaft is in communication with the external environment, and the communication pipe is used for supplying cleaning liquid and cement slurry into the inside of the pin shaft.

[0023] By adopting the above technical scheme, after the steel truss girder bridge is horizontally rotated, the construction personnel first supply cleaning liquid between the lower spherical hinge and the upper spherical hinge through the communication pipe, flush the lubricating oil between the lower spherical hinge and the upper spherical hinge with the cleaning liquid, then supply cement slurry between the lower spherical hinge and the upper spherical hinge, and after the cement slurry solidifies, the cement slurry is used to connect the lower spherical hinge and the upper spherical hinge together, so that the connection strength between the upper spherical hinge and the lower spherical hinge is improved, and the support strength of the steel truss girder bridge is ensured.

[0024] Preferably, the slide is provided with a bracing mechanism, the bracing mechanism comprising a sliding ring, a plurality of bracing rods and a plurality of connecting rods, the sliding ring being slidingly connected to the slide, the sliding ring being coaxially arranged with the slide, the plurality of bracing rods being connected to the sliding ring, the plurality of bracing rods being used to support the formwork for pouring the upper deck, the plurality of connecting rods being fixedly connected to the sliding ring, and the plurality of connecting rods being integrally poured and formed with the upper deck.

[0025] By adopting the above technical scheme, the sliding ring is arranged on the slide, the plurality of connecting rods are integrally poured and formed with the upper deck, the sliding ring can support the upper deck, and the support strength of the bridge is improved; meanwhile, in the construction process, the bracing rods are used to support the formwork for pouring the upper deck, and the convenience of the upper deck pouring construction is improved.

[0026] Preferably, the plurality of bracing rods are slidingly connected to the sliding ring, each bracing rod slides along the axis direction of the sliding ring, a plurality of clamping grooves are arranged on the slide, the plurality of clamping grooves are arranged in one-to-one correspondence with the plurality of bracing rods, the lower deck is provided with a driving assembly, the plurality of bracing rods are connected to the driving assembly, and the driving assembly drives the plurality of bracing rods to synchronously slide so that the bracing rods are inserted into the clamping grooves corresponding to the bracing rods.

[0027] By adopting the above technical scheme, the bracing rods are slidingly connected to the sliding ring, in the process of horizontally rotating the steel truss girder bridge to complete the construction of the bridge, the sliding ring rotates on the slide along the axis of the sliding ring, the support strength of the bridge is ensured; after the horizontal rotation of the bridge is completed, the driving assembly is started, the driving assembly is used to drive the plurality of bracing rods to move downward, the bracing rods are inserted into the clamping grooves corresponding to the bracing rods, the sliding ring is locked, and the stability of the sliding ring supporting the upper deck is improved.

[0028] Preferably, the dragging mechanism in step S7 comprises a steel cable and a guide wheel, the steel cable is fixedly connected to the steel truss girder bridge, the guide wheel is rotatably connected to the main pier, the main pier is provided with a wire passing cavity, the guide wheel is located in the wire passing cavity, the steel cable is connected to the corresponding tensioning jack after passing around the guide wheel, and the tensioning jack is used to pull the steel truss girder bridge to move.

[0029] By adopting the above technical scheme, after the horizontal rotation of the steel truss girder bridge is completed, the steel cable is connected to the corresponding tensioning jack, then the tensioning jack is started, the steel cable is pulled to move by the tensioning jack, and then the steel truss girder bridge is pulled to move a certain distance, so that the steel truss girder bridge and the upper deck surface are quickly closed, and the influence on the normal traffic of the lower river or road is reduced.

[0030] Preferably, the main pier is provided with a locking assembly, the locking assembly comprises a support plate, a plug rod and a spring, the support plate is slidingly connected in the wire passing cavity, the plug rod is fixedly connected to the support plate, a plug hole is formed in the steel truss girder bridge, the spring is arranged between the support plate and the main pier, the spring is used for pushing the plug rod to insert into the plug hole, and the support plate is fixedly connected with the steel cable.

[0031] By adopting the above technical scheme, before the steel truss girder bridge is slid and closed, the plug rod is inserted into the plug hole of the steel truss girder bridge under the pushing of the spring, so that the stability of the steel truss girder bridge is ensured; when the steel truss girder bridge is pulled to move, the steel cable first pulls the support plate to move downward, so that the plug rod is pulled out of the plug hole, and then the steel cable is continuously pulled to pull the steel truss girder bridge to move.

[0032] In summary, the present application at least has the following beneficial technical effects:

[0033] 1. By arranging the lower spherical hinge and the upper spherical hinge between the upper bearing platform and the lower bearing platform, during the construction of the steel truss girder bridge, the construction personnel can assemble and fix the steel truss girder bridge on one side of the river channel or the driving lane, temporarily construct the steel truss girder bridge on the main pier and the temporary support, and then drive the main pier to rotate by rotating the upper bearing platform through the tensioning jack, so that the main pier drives the steel truss girder bridge to rotate, and the steel truss girder bridge completes horizontal turning, and the construction of the steel truss girder bridge is completed. Since the construction position is located on one side of the river channel or the driving lane during the construction process, the possibility of affecting the river channel or the driving lane is reduced, and the traffic capacity of the river channel or the driving lane is ensured.

[0034] 2. By hollowing the pin shaft, after the steel truss girder bridge completes horizontal turning, the construction personnel can supply cement slurry between the lower spherical hinge and the upper spherical hinge, and after the cement slurry solidifies, the cement slurry is used to connect the lower spherical hinge and the upper spherical hinge together, so as to improve the connection strength between the upper spherical hinge and the lower spherical hinge, thereby ensuring the support strength of the steel truss girder bridge.

[0035] 3. By arranging the dragging mechanism on the main pier, after the steel truss girder bridge completes horizontal turning, the steel cable is connected with the corresponding tensioning jack, and then the tensioning jack is used to pull the steel cable, thereby driving the steel truss girder bridge to move a certain distance, so as to realize the rapid closure of the steel truss girder bridge and the upper deck, and reduce the influence on the normal construction below. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is a flow chart of the steel truss girder bridge horizontal turning construction method of the embodiment of the present application;

[0037] Figure 2 is a schematic diagram of the overall mechanism of the embodiment of the present application;

[0038] Figure 3 is a structural schematic diagram of a lower bearing platform in an embodiment of the present application;

[0039] Figure 4 is a structural schematic diagram of a jacking mechanism in an embodiment of the present application;

[0040] Figure 5 is a structural schematic diagram of a lower spherical hinge in an embodiment of the present application;

[0041] Figure 6 is a sectional structural schematic diagram of a lower spherical hinge in an embodiment of the present application.

[0042] Figure 7 is a structural schematic diagram of a fixing mechanism in an embodiment of the present application.

[0043] Figure 8 is a structural schematic diagram of a driving assembly in an embodiment of the present application.

[0044] Figure 9 is an enlarged schematic diagram of part A in an embodiment of the present application. Figure 8

[0045] Figure 10 is a structural schematic diagram of a dragging mechanism in an embodiment of the present application.

[0046] Figure 11 is a structural schematic diagram of a locking assembly in an embodiment of the present application.

[0047] Reference signs: 100, lower bearing platform; 200, lower spherical hinge; 210, polytetrafluoroethylene sliding sheet; 300, slide; 400, pin shaft; 410, through hole; 420, communication pipe; 500, upper spherical hinge; 510, fixing mechanism; 511, hydraulic cylinder; 512, support ring; 513, fixed rod; 514, sealing ring; 520, upper bearing platform; 530, main pier; 600, jacking mechanism; 610, sliding ring; 620, connecting rod; 630, jacking rod; 640, driving assembly; 641, oil cylinder; 642, pressing rod; 643, electric push cylinder; 644, oil passing pipe; 645, lifting plate; 646, oil cavity; 647, air cavity; 650, clamping groove; 700, tensioning jack; 800, dragging mechanism; 810, steel cable; 820, guide wheel; 830, connecting block; 840, locking assembly; 841, support plate; 842, inserting rod; 843, spring; 850, wire passing cavity. DETAILED DESCRIPTION

[0048] The present application is further described in detail below with reference to the accompanying drawings. Figures 1-11 The present application is further described in detail below with reference to the accompanying drawings.

[0049] An embodiment of the present application discloses a steel truss girder bridge horizontal swivel construction method.

[0050] Reference is made to​Figure 1 and Figure 2 A horizontal rotation construction method of a steel truss girder bridge comprises the following steps:

[0051] S1: construction of a lower bearing platform 100, excavating a foundation pit at a construction site, pouring foundation piles in the foundation pit, and then pouring the lower bearing platform 100 on the foundation piles;

[0052] S2: construction of a lower spherical hinge 200, erecting the lower spherical hinge 200 on the lower bearing platform 100, erecting a slide 300 on the periphery of the lower spherical hinge 200, penetrating a pin shaft 400 at the axis position of the lower spherical hinge 200, and then pouring reinforced concrete between the lower spherical hinge 200 and the slide 300 to complete the construction and fixation of the lower spherical hinge 200 and the slide 300;

[0053] S3: construction of an upper spherical hinge 500, hoisting the upper spherical hinge 500 and aligning it with the pin shaft 400, then placing the upper spherical hinge 500 on the lower spherical hinge 200 and inserting the upper spherical hinge 500 on the pin shaft 400;

[0054] S4: construction of an upper bearing platform 520, setting a jacking mechanism 600 on the slide 300 and erecting a pouring formwork on the jacking mechanism 600, then pouring reinforced concrete on the upper spherical hinge 500 to form the upper bearing platform 520;

[0055] S5: assembly of the bridge, pouring reinforced concrete on the upper bearing platform 520 to form a main pier 530, erecting temporary supports on both sides of the main pier 530, and then assembling a steel truss girder bridge on the main pier 530 and the temporary supports;

[0056] S6: turning of the bridge, installing two tensioning jacks 700 on the lower bearing platform 100 and winding two steel strands on the upper bearing platform 520, then driving the upper bearing platform 520 to rotate by pulling the two steel strands through the two tensioning jacks 700 to realize the rotation of the steel truss girder bridge;

[0057] S7: closure of the bridge, sliding the steel truss girder bridge on the main pier 530, setting a pulling mechanism 800 on the main pier 530, connecting the pulling mechanism 800 with the tensioning jacks 700, and jointly pulling the steel truss girder bridge by the tensioning jacks 700 and the pulling mechanism 800 to move and close with the upper section of the bridge deck, thus completing the construction.

[0058] The steel truss girder bridge is constructed and assembled on one side of a river or a road, then the main pier 530 and the steel truss girder bridge on the main pier 530 are pulled to rotate by the tensioning jacks 700, and then the steel truss girder bridge is fixed, thus completing the construction of the steel truss girder bridge. During the construction, the construction site is located on one side of the river or the road, which reduces the possibility of affecting the river or the road and ensures the traffic capacity of the river or the road.

[0059] Reference Figure 3 ,Figure 4 And Figure 5 In order to facilitate the rotation of the upper spherical hinge 500, a plurality of polytetrafluoroethylene sliding sheets 210 are fixedly connected to the upper surface of the lower spherical hinge 200, the plurality of polytetrafluoroethylene sliding sheets 210 are uniformly distributed on the upper surface of the lower spherical hinge 200, and adjacent two polytetrafluoroethylene sliding sheets 210 are arranged at intervals. The upper surface of the lower spherical hinge 200 is coated with lubricating oil, and the upper spherical hinge 500 abuts against the plurality of polytetrafluoroethylene sliding sheets 210. The polytetrafluoroethylene sliding sheet 210 and the lubricating oil are used to reduce the friction coefficient between the upper spherical hinge 500 and the lower spherical hinge 200, thereby reducing the friction resistance of the upper spherical hinge 500 during rotation, and facilitating the rotation of the steel truss girder bridge.

[0060] With reference to Figure 5 And Figure 6 In order to improve the connection strength of the lower spherical hinge 200 and the upper spherical hinge 500 after the horizontal rotation of the bridge is completed, the pin shaft 400 is hollow, a plurality of through holes 410 are formed in the pin shaft 400, the plurality of through holes 410 are arranged at intervals along the circumferential side of the pin shaft 400, one end of each through hole 410 communicates with the inside of the pin shaft 400, and the other end of each through hole 410 communicates with the gap between the lower spherical hinge 200 and the upper spherical hinge 500. The lower bearing platform 100 is poured with a communication pipe 420, one end of the communication pipe 420 communicates with the inside of the pin shaft 400, and the other end of the communication pipe 420 away from the pin shaft 400 penetrates out of the lower bearing platform 100. After the horizontal rotation of the bridge is completed, the construction personnel first connect the communication pipe 420 with the cleaning liquid supply equipment, supply cleaning liquid into the pin shaft 400 through the communication pipe 420, make the cleaning liquid enter the gap between the lower spherical hinge 200 and the upper spherical hinge 500 through the through hole 410, and then make the cleaning liquid clean and remove the lubricating oil, and then connect the communication pipe 420 with the external cement slurry supply equipment, supply cement slurry to the gap between the lower spherical hinge 200 and the upper spherical hinge 500, after the cement slurry is solidified, the cement slurry is used to connect the lower spherical hinge 200 and the upper spherical hinge 500 together, improve the connection strength between the upper spherical hinge 500 and the lower spherical hinge 200, and thus ensure the support strength of the steel truss girder bridge.

[0061] With reference to Figure 5 And Figure 7, in order to improve the stability of the upper ball hinge 500 after installation, the upper ball hinge 500 is provided with a fixing mechanism 510, the fixing mechanism 510 comprises two hydraulic cylinders 511, both of which are fixedly connected with the upper ball hinge 500 and are located at opposite sides of the upper ball hinge 500. The piston rods of the two hydraulic cylinders 511 are connected with a support ring 512, which is horizontally arranged and is sleeved on the outer side of the upper ball hinge 500. A plurality of fixing rods 513 are fixedly connected with the side of the support ring 512 away from the hydraulic cylinders 511, and are vertically arranged. The plurality of fixing rods 513 are arranged at intervals with the axis of the support ring 512 as the center. A plurality of fixing holes are formed in the lower bearing platform 100, and the plurality of fixing holes and the plurality of fixing rods 513 are arranged one-to-one. The fixing holes are matched with the fixing rods 513. During the construction of the rotating pier, the upper ball hinge 500 is inserted on the pin shaft 400 and placed on the lower ball hinge 200, and then the two hydraulic cylinders 511 are started to drive the support ring 512 to move downward, which drives the plurality of fixing rods 513 to move downward, so that the fixing rods 513 are inserted into the fixing holes corresponding to them, thereby fixing the upper ball hinge 500 and ensuring the stability of the upper ball hinge 500, so as to ensure the stability of the upper bearing platform 520 and the main pier 530 above the upper ball hinge 500 during construction and pouring. When the upper ball hinge 500 is rotated, the piston rod of the hydraulic rod 642 is retracted to drive the fixing rods 513 to be pulled out of the fixing holes, and then the steel truss girder bridge can be horizontally rotated. After the bridge is rotated, the hydraulic cylinder 511 is started again to drive the fixing rods 513 to be inserted into the other fixing holes opposite to them at this time, thereby fixing the upper ball hinge 500 and ensuring the stability of the steel truss girder bridge after rotation.

[0062] With reference to Figure 5 and Figure 7 , in order to avoid the entry of sand and other sundries into the gap between the upper ball hinge 500 and the lower ball hinge 200 during the construction of the main pier 530, a sealing ring 514 is fixedly connected with the support ring 512, the sealing ring 514 is sleeved on the outer side of the upper ball hinge 500 and is in close contact with the outer side of the upper ball hinge 500, and the sealing ring 514 is in sliding connection with the upper ball hinge 500. When the piston rod of the hydraulic cylinder 511 is elongated to drive the fixing rods 513 to be inserted into the fixing holes, the support ring 512 drives the sealing ring 514 to move downward to the position between the upper ball hinge 500 and the lower ball hinge 200, thereby blocking the gap between the upper ball hinge 500 and the lower ball hinge 200, reducing the possibility of affecting the relative rotation of the upper ball hinge 500 and the lower ball hinge 200 due to the entry of sand and other sundries into the gap between the upper ball hinge 500 and the lower ball hinge 200 during construction. When the lubricating oil is cleaned, the hydraulic cylinder 511 drives the sealing ring 514 to continue to move downward to open the gap between the upper ball hinge 500 and the lower ball hinge 200.

[0063] With reference toFigure 2 、 Figure 4 and Figure 5 In order to ensure the support strength of the steel truss girder bridge, the top support mechanism 600 is installed on the slide 300, the top support mechanism 600 comprises a sliding ring 610 which is matched with the slide 300, the sliding ring 610 is slidingly connected on the slide 300, a plurality of connecting rods 620 are fixedly connected at the top of the sliding ring 610, the plurality of connecting rods 620 are arranged at intervals with the circumferential side of the sliding ring 610 as the center, and the connecting rods 620 are used for being poured together with the upper bearing platform 520.

[0064] Referring to Figure 4 、 Figure 5 and Figure 8 A top support rod 630 is installed between every two adjacent connecting rods 620, the top support rod 630 is vertically arranged, each top support rod 630 is slidingly connected on the sliding ring 610, and each top support rod 630 slidingly moves in the vertical direction. The drive assembly 640 is installed on the lower bearing platform 100 and is used for driving the plurality of top support rods 630 to synchronously slide. A plurality of clamping grooves 650 are formed on the slide 300, the plurality of clamping grooves 650 are arranged in one-to-one correspondence with the plurality of top support rods 630, and the top support rod 630 can be inserted into the clamping groove 650 corresponding to the top support rod 630. Before the upper bearing platform 520 is constructed and poured, the drive assembly 640 drives the plurality of top support rods 630 to move upwards, so that the plurality of top support rods 630 support the formwork for pouring the upper bearing platform 520, and then the plurality of connecting rods 620 are poured into the upper bearing platform 520. After the upper bearing platform 520 is poured, the drive assembly 640 drives the top support rod 630 to move downwards by a distance, so that the top support rod 630 is separated from the formwork, and the formwork is convenient to disassemble. After the bridge is completed and horizontally rotated, the drive assembly 640 continues to drive the top support rod 630 to move downwards, so that the top support rod 630 is inserted into the clamping groove 650 corresponding to the top support rod 630, the sliding ring 610 is locked, and the stability of the sliding ring 610 supporting the upper bearing platform 520 is improved.

[0065] Referring to Figure 8 and Figure 9 The drive assembly 640 comprises an oil cylinder 641 which is fixedly connected on the lower bearing platform 100, a pressing rod 642 is penetratingly arranged on the oil cylinder 641, the pressing rod 642 is slidingly connected on the oil cylinder 641, an electric push cylinder 643 is fixedly connected on the lower bearing platform 100, a piston rod of the electric push cylinder 643 is fixedly connected with the pressing rod 642, the electric push cylinder 643 drives the pressing rod 642 to slide, and an oil pipe 644 is fixedly connected on the cylinder body of the oil cylinder 641, the oil pipe 644 is in communication with the inside of the oil cylinder 641.

[0066] The sliding ring 610 is hollowly arranged, the inside of the sliding ring 610 is slidably connected with a lifting plate 645, the lifting plate 645 slides along the vertical direction, and the plurality of supporting rods 630 are fixedly connected with the lifting plate 645; the lifting plate 645 divides the inside of the sliding ring 610 into two chambers, the chamber above the lifting plate 645 is an air chamber 647, the air chamber 647 is communicated with the outside environment; and the chamber below the lifting plate 645 is an oil chamber 646, and one end of the oil passing pipe 644 away from the oil cylinder 641 is communicated with the oil chamber 646. In the construction process, the hydraulic oil in the oil cylinder 641 can be pressed into the oil chamber 646 by using the piston rod of the electric push cylinder 643 to extend and press the pressing rod 642, then the lifting plate 645 is moved upwards, so that the plurality of supporting rods 630 are moved upwards, the support to the formwork is realized; and the hydraulic oil in the oil chamber 646 can be returned to the oil cylinder 641 by using the piston rod of the electric push cylinder 643 to contract, so that the supporting rods 630 are moved downwards, and the lifting of the supporting rods 630 is controlled.

[0067] With reference to Figure 2 , Figure 10 and Figure 11 , after the horizontal rotation of the steel truss girder bridge, there is a gap between the upper bridge decks of the steel truss girder bridge, in order to facilitate the closing and fixing of the steel truss girder bridge and the upper bridge deck, the steel truss girder bridge is slidably connected to the main pier 530, and the steel truss girder bridge slides along the length of the steel truss girder bridge.

[0068] The two groups of dragging mechanisms 800 are provided in step S7, and the two groups of dragging mechanisms 800 are provided in one-to-one correspondence with the two tensioning jacks 700. Each dragging mechanism 800 comprises a steel cable 810 and a guide wheel 820, and a wire passing cavity 850 is reserved in the main pier 530, one of the guide wheels 820 is rotationally connected to the main pier 530 and located in the wire passing cavity 850, and the other guide wheel 820 is rotationally connected to one side of the upper deck 520 close to the lower deck 100. The lower end of the steel truss girder bridge is fixedly connected with a connecting block 830, one end of the steel cable 810 is fixedly connected to the connecting block 830, the other end of the steel cable 810 naturally falls after passing through the two guide wheels 820, and the end of the steel cable 810 away from the connecting block 830 is used for being connected with the corresponding tensioning jack 700, so that the tensioning jack 700 can pull the steel cable 810 to make the steel truss girder bridge slide. After the horizontal rotation of the steel truss girder bridge is completed, the steel strand wound around the side of the lower deck 100 is detached from the tensioning jack 700, then the steel cable 810 is connected to the tensioning jack 700, then the two tensioning jacks 700 are started synchronously, the two tensioning jacks 700 are used again to pull the two steel cables 810, then the steel truss girder bridge is moved by a certain distance, and the rapid closing of the steel truss girder bridge and the upper bridge deck is realized, thereby reducing the influence on the normal traffic of the lower river or road.

[0069] With reference to Figure 10 andFigure 11 In order to ensure the stability of the steel truss girder bridge before pushing, two sets of locking assemblies 840 are installed in the main pier 530, and the two sets of locking assemblies 840 are located near the two sides of the steel truss girder respectively. Each set of locking assemblies 840 includes a support plate 841, the support plate 841 is horizontally arranged, the support plate 841 is fixedly connected with a plug rod 842, the plug rod 842 is vertically arranged, the plug rod 842 is inserted into the plug hole arranged on the steel truss girder, the support plate 841 is slidingly connected in the wire passing cavity 850, two springs 843 are fixedly connected below the support plate 841, one end of each spring 843 is fixedly connected with the support plate 841, the other end of each spring 843 is fixedly connected with the main pier 530, the spring 843 applies an upward force to the support plate 841, the support plate 841 is fixedly connected with the corresponding steel cable 810, when the plug rod 842 is inserted into the plug hole, the steel cable 810 is in a relaxed state. Before pulling the steel truss girder bridge to slide, the plug rod 842 is inserted into the plug hole under the pushing of the spring 843, and the steel truss girder bridge is fixed by high-strength bolts to ensure the stability of the steel truss girder bridge; when pulling the steel truss girder bridge to move, after the high-strength bolts are unscrewed, the plug rod 842 and the plug hole are used to keep the bridge stable, and then the steel cable 810 is pulled. The steel cable 810 first pulls the support plate 841 to move downward, so that the plug rod 842 is pulled out of the plug hole, and then the steel truss girder bridge is pulled to move.

[0070] The implementation principle of the steel truss girder bridge horizontal rotation construction method is that the lower spherical hinge 200 and the upper spherical hinge 500 are arranged between the upper bearing platform 520 and the lower bearing platform 100, and the upper spherical hinge 500 and the lower spherical hinge 200 can rotate relative to each other. When the steel truss girder bridge is constructed, the construction personnel can assemble and fix the steel truss girder bridge on one side, so that the steel truss girder bridge is temporarily constructed on the main pier 530 and the temporary support, and then the upper bearing platform 520 is driven to rotate by the tensioning jack 700, so that the main pier 530 is driven to rotate, the main pier 530 drives the steel truss girder bridge to rotate, and the steel truss girder bridge completes horizontal rotation, that is, the construction of the steel truss girder bridge is completed. Since the construction position is located on one side of the river or the driving lane during the construction process, the possibility of affecting the river or the driving lane is reduced, and the traffic capacity of the river or the driving lane is ensured.

[0071] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, any equivalent changes made on the basis of the structure, shape and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A method for horizontal rotation construction of a steel truss bridge, characterized in that: Includes the following steps: S1: Construction of the lower foundation (100): Excavate the foundation pit at the construction location, pour foundation piles in the foundation pit, and then pour the lower foundation (100) on the foundation piles. S2: Construction of the lower ball joint (200): The lower ball joint (200) is erected on the lower bearing platform (100), and a slide rail (300) is erected around the lower ball joint (200). A pin (400) is inserted through the axis of the lower ball joint (200). Then, reinforced concrete is poured between the lower ball joint (200) and the slide rail (300) to complete the construction and fixation of the lower ball joint (200) and the slide rail (300). S3: Construction of the upper ball joint (500): Lift the upper ball joint (500) and align it with the pin (400), then place the upper ball joint (500) on the lower ball joint (200) and insert the upper ball joint (500) into the pin (400); S4: Construction of the upper bearing platform (520): A top support mechanism (600) is set on the slide (300), and a pouring template is erected on the top support mechanism (600). Then, reinforced concrete is poured on the upper ball joint (500) to form the upper bearing platform (520). S5: Bridge assembly, pouring reinforced concrete on the upper abutment (520) to form the main pier (530), and erecting temporary supports on both sides of the main pier (530), and then splicing the steel truss beam bridge on the main pier (530) and the temporary supports; S6: Bridge turning, a tensioning jack (700) is installed on the lower abutment (100), and a steel strand is wound on the upper abutment (520). The tensioning jack (700) pulls the steel strand to drive the upper abutment (520) to rotate, thereby realizing the turning of the steel truss beam bridge; S7: Bridge closure, the steel truss beam bridge is slidably set on the main pier (530), a dragging mechanism (800) is set on the main pier (530), the dragging mechanism (800) is connected to the tensioning jack (700), the tensioning jack (700) and the dragging mechanism (800) together pull the steel truss beam bridge to move and close with the upper bridge deck, and the construction is completed; A fixing mechanism (510) is provided on the upper ball joint (500). The fixing mechanism (510) includes a hydraulic cylinder (511), a support ring (512), and multiple fixing rods (513). The hydraulic cylinder (511) is fixedly connected to the upper ball joint (500). The support ring (512) is sleeved on the outside of the upper ball joint (500) and is slidably connected to the upper ball joint (500). Multiple fixing rods (513) are fixedly connected to the support ring (512). Multiple fixing holes are provided on the lower support platform (100). The multiple fixing holes are provided one-to-one with the multiple fixing rods (513). The fixing holes are used to insert the corresponding fixing rods (513). The pin (400) is hollow, and a connecting pipe (420) is cast inside the lower bearing (100). The connecting pipe (420) is connected to the inside of the pin (400). A through hole (410) is opened on the side wall of the pin (400). The through hole (410) connects the gap between the lower ball joint (200) and the upper ball joint (500). The end of the connecting pipe (420) away from the pin (400) is connected to the external environment. The connecting pipe (420) is used to supply cleaning fluid and cement slurry to the inside of the pin (400).

2. The method for horizontal rotation construction of a steel truss bridge according to claim 1, characterized in that: The upper surface of the lower ball joint (200) is equipped with a plurality of polytetrafluoroethylene sliding plates (210), and the upper surface of the lower ball joint (200) and the plurality of polytetrafluoroethylene sliding plates (210) are coated with lubricating oil.

3. The method for horizontal rotation construction of a steel truss bridge according to claim 1, characterized in that: A sealing ring (514) is fixedly connected to the support ring (512). The sealing ring (514) is attached to the outside of the upper ball joint (500) and seals the gap between the lower ball joint (200) and the upper ball joint (500).

4. The method for horizontal rotation construction of a steel truss bridge according to claim 1, characterized in that: A top support mechanism (600) is provided on the slide rail (300). The top support mechanism (600) includes a sliding ring (610), multiple top support rods (630) and multiple connecting rods (620). The sliding ring (610) is slidably connected to the slide rail (300) and is coaxially arranged with the slide rail (300). The multiple top support rods (630) are all connected to the sliding ring (610). The multiple top support rods (630) are used to support the template for casting the upper support platform (520). The multiple connecting rods (620) are all fixedly connected to the sliding ring (610). The multiple connecting rods (620) are integrally cast with the upper support platform (520).

5. The method for horizontal rotation construction of a steel truss bridge according to claim 4, characterized in that: Multiple top support rods (630) are slidably connected to the sliding ring (610). Each top support rod (630) slides along the axis of the sliding ring (610). Multiple slots (650) are provided on the slide rail (300). Each slot (650) corresponds to one of the multiple top support rods (630). A drive assembly (640) is provided on the lower support platform (100). Each top support rod (630) is connected to the drive assembly (640). The drive assembly (640) drives the multiple top support rods (630) to slide synchronously so that each top support rod (630) inserts into its corresponding slot (650).

6. The method for horizontal rotation construction of a steel truss bridge according to claim 1, characterized in that: The dragging mechanism (800) mentioned in step S7 includes a steel cable (810) and a guide wheel (820). The steel cable (810) is fixedly connected to the steel truss bridge, and the guide wheel (820) is rotatably connected to the main pier (530). A cable passage cavity (850) is opened on the main pier (530). The guide wheel (820) is located in the cable passage cavity (850). After the steel cable (810) passes around the guide wheel (820), it is connected to the tension jack (700) corresponding to itself. The tension jack (700) is used to pull the steel truss bridge to move.

7. The method for horizontal rotation construction of a steel truss bridge according to claim 6, characterized in that: A locking assembly (840) is provided inside the main pier (530). The locking assembly (840) includes a support plate (841), a plug rod (842), and a spring (843). The support plate (841) is slidably connected inside the cable passage cavity (850). The plug rod (842) is fixedly connected to the support plate (841). A plug hole is provided on the steel truss beam bridge. The spring (843) is located between the support plate (841) and the main pier (530). The spring (843) is used to push the plug rod (842) into the plug hole. The support plate (841) is fixedly connected to the steel cable (810).

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