Bridge substructure prefabricated installation device and construction method

Abstract

A bridge substructure prefabricated installation device and construction method, wherein the device comprises: a structure platform, the structure platform is provided with a through hole for the bridge pier to pass through; a climbing load bearing system is arranged outside the bridge pier and is connected with the structure platform, and is used to drive the structure platform to move up and down along the bridge pier, the number of the climbing load bearing system is at least two; a moving system is arranged on the structure platform and can move along the structure platform; a rotary hoisting system comprises a hoisting mechanism, a shoulder pole beam, a rotating mechanism and a lifting appliance, the number of the hoisting mechanism is at least two and the hoisting mechanism is arranged on the moving system at intervals, the hoisting mechanism is detachably connected with the shoulder pole beam and is used to drive the shoulder pole beam to rise and fall, the rotating mechanism is connected with the shoulder pole beam and the lifting appliance respectively and is used to drive the lifting appliance to rotate; a control system is connected with the climbing load bearing system, the moving system and the rotary hoisting system respectively. The present application can solve the deficiency in the existing bridge substructure construction technology.

Description

Technical Field

[0001] This invention belongs to the field of bridge construction technology, and in particular relates to a prefabrication and installation device and construction method for bridge substructure. Background Technology

[0002] The substructure of bridges, including bridge piers, central beams, and cap beams, is still largely constructed using a sequential method: installing pier formwork, pouring concrete, removing the formwork, installing central beam load-bearing formwork, pouring central beam concrete, removing central beam load-bearing formwork, installing cap beam load-bearing formwork, pouring cap beam concrete, and removing cap beam load-bearing formwork. This traditional method is detrimental to quality control, construction safety, construction progress, and construction cost management of the bridge substructure.

[0003] In China, there have been attempts to use prefabrication and installation techniques for the substructure construction of bridges, but these techniques are basically only applicable to municipal bridges and bridges in plains areas with relatively low bridge heights. In addition, the use of prefabrication and installation techniques for the substructure construction of bridges generally requires large lifting equipment to hoist the prefabricated bridge components, which significantly increases the construction cost. Furthermore, large lifting equipment places higher demands on the geographical environment of the construction site, making it even more difficult to promote in mountainous areas with harsh geographical environments and when the bridge piers are relatively high. Summary of the Invention

[0004] The purpose of this invention is to provide a prefabrication and installation device and construction method for bridge substructures, which can solve the shortcomings of existing bridge substructure construction technology.

[0005] This invention is achieved through the following technical solution:

[0006] A prefabrication and installation device for bridge substructure.

[0007] include:

[0008] The structural platform has through holes for the bridge piers to pass through;

[0009] The climbing load-bearing system is located on the outside of the pier and connected to the structural platform. It is used to drive the structural platform to move up and down along the pier. There are at least two climbing load-bearing systems.

[0010] A mobile system is mounted on a structural platform and can move along the structural platform.

[0011] The rotating hoisting system includes a lifting mechanism, a spreader beam, a rotating mechanism, and a lifting device. There are at least two lifting mechanisms, which are spaced apart on the moving system. The lifting mechanism is detachably connected to the spreader beam and is used to drive the spreader beam to rise and fall. The rotating mechanism is connected to both the spreader beam and the lifting device and is used to drive the lifting device to rotate.

[0012] The control system is connected to the climbing load-bearing system, the moving system, and the rotating hoisting system, respectively.

[0013] Furthermore, the climbing load-bearing system includes a first clamping mechanism and a second clamping mechanism vertically spaced outside the pier for clamping or releasing the pier, and two screw climbing mechanisms set on both sides of the pier. The screw climbing mechanism includes a screw support, a transmission screw, a nut assembly, and a drive assembly. The top end of the screw support is connected to the structural platform, and its bottom end is connected to the second clamping mechanism. The transmission screw is set inside the screw support through a bearing assembly and is rotatably connected to the bearing assembly. The drive assembly is connected to the transmission screw and is used to drive the transmission screw to rotate. The nut assembly is threadedly connected to the transmission screw and moves along the transmission screw when the transmission screw rotates. The nut assembly is connected to the first clamping mechanism.

[0014] Furthermore, the climbing load-bearing system also includes a roller mechanism, which comprises two roller assemblies and two elastic components. Each roller assembly includes a roller connecting plate and a balance roller. The roller connecting plate is hinged to the bottom end of the nut connecting plate, and the balance roller is rotatably mounted on the roller connecting plate. Each elastic component includes an adjusting screw, a pressure spring, a pressure plate, and a pressure nut. The pressure plate is mounted on the roller connecting plate, the adjusting screw passes through the pressure plate, the pressure nut is located above the pressure plate and is threadedly connected to the adjusting screw, and the pressure spring is sleeved on the outside of the adjusting screw. Both ends of the pressure spring are connected to the pressure plate and the nut connecting plate, respectively.

[0015] Furthermore, the bearing assembly includes a bearing housing plate, a first thrust bearing, a first locking element, a first fulcrum plate, a second thrust bearing, an adjusting plate, and a second locking element. The top end of the transmission screw is mounted on the bearing housing plate via the first thrust bearing. The bearing housing plate is mounted on the screw support. The first locking element is mounted on the transmission screw and contacts the first thrust bearing. The first fulcrum plate is sleeved on the outer side of the bottom end of the transmission screw and is mounted on the screw support. The adjusting plate is mounted on the transmission screw and contacts the side of the first fulcrum plate away from the bearing housing plate. The second thrust bearing is mounted on the transmission screw and contacts the side of the adjusting plate away from the first fulcrum plate. The second locking element is mounted on the transmission screw and contacts the second thrust bearing.

[0016] Furthermore, the moving system includes a track set at the top of the structural platform and a translation trolley slidably set on the track. The lifting mechanism includes a winch, a wire rope connected to the winch, a fixed pulley block set on the translation trolley, and a movable pulley block detachably set on the spreader beam. The wire rope passes through the movable pulley block and the fixed pulley block in sequence and is then fixed on the movable pulley block.

[0017] Furthermore, the rotating mechanism includes a first rotating steel frame, a power unit, a plane bearing, and a second rotating steel frame. The first rotating steel frame is mounted on the spreader beam. The power unit is mounted inside the first rotating steel frame and connected to the second rotating steel frame to drive the second rotating steel frame to rotate. The second rotating steel frame is sleeved on the outside of the first rotating steel frame and connected to the first rotating steel frame through the plane bearing. The lifting device is mounted on the second rotating steel frame.

[0018] Furthermore, the first clamping mechanism is a three-lobed pin-hinged lifting clamp, which includes a first arc-shaped module, a second arc-shaped module, and a third arc-shaped module that are hinged in sequence, as well as several pull-and-open jacks for locking or unlocking the first arc-shaped module and the third arc-shaped module. The second clamping mechanism has the same structure as the first clamping mechanism.

[0019] The structural platform includes a main beam platform, two first platforms, and two second platforms. Through holes are set on the main beam platform. Both the first and second platforms are rectangular frame structures. The first and second platforms include a U-shaped frame and a first movable frame. The two ends of the first movable frame are detachably installed at the two ends of the U-shaped frame. The main beam platform is connected to the top of the screw rod support. The two first platforms correspond one-to-one with two first clamping mechanisms. The second arc-shaped module of the first clamping mechanism is movably connected to the U-shaped frame of the corresponding first platform through several first connecting components. The first arc-shaped module and the third arc-shaped module of the first clamping mechanism are movably connected to the U-shaped frame of the corresponding first platform through first connecting components.

[0020] The two second platforms correspond one-to-one with the two second clamping mechanisms. The second arc-shaped module of the second clamping mechanism is connected to the U-shaped frame of the corresponding second platform through several second connecting components. The first arc-shaped module and the third arc-shaped module of the second clamping mechanism are movably connected to the U-shaped frame of the corresponding second platform through third connecting components.

[0021] Furthermore, the structural platform also includes a third platform, a support frame, and a third clamping mechanism. The third platform is located between the two second platforms and is connected to the main beam platform through the support frame. The third platform is a rectangular frame structure. The third platform includes two fixed frames and two second movable frames arranged opposite each other. The two ends of the second movable frames are detachably installed on the two fixed frames respectively. The two fixed frames of the third platform are connected to the third clamping mechanism through a fourth connecting component.

[0022] Furthermore, the first connecting assembly includes a fourth bracket steel plate, a second bracket upper suspension plate and a second bracket lower suspension plate. The second bracket upper suspension plate is connected to the first platform, and the second bracket lower suspension plate is rotatably mounted on the second bracket upper suspension plate and connected to the fourth bracket steel plate. The fourth bracket steel plate is connected to the first clamping mechanism.

[0023] The second connecting component includes a first bracket steel plate and two first bracket connecting plates respectively disposed on both sides of the first bracket steel plate. One first bracket connecting plate is detachably connected to the second arc-shaped module of the second clamping mechanism, and the other first bracket connecting plate is detachably connected to a first bracket fixing plate. The first bracket fixing plate is connected to the U-shaped frame of the second platform.

[0024] The third connecting assembly includes a second bracket steel plate, a third bracket steel plate, a second bracket fixing plate, a first bracket upper suspension plate, a first bracket lower suspension plate, and a third bracket fixing plate. One end of the second bracket steel plate is detachably connected to the first arc-shaped module or the third arc-shaped module of the second clamping mechanism. The upper part of the other end of the second bracket steel plate is connected to the third bracket steel plate. The first bracket upper suspension plate is set at the bottom end of the third bracket steel plate. The first bracket lower suspension plate is rotatably set on the first bracket upper suspension plate and connected to the third bracket fixing plate. The third bracket fixing plate is connected to the U-shaped frame of the second platform. Both ends of the second bracket fixing plate are detachably connected to the second bracket steel plate and the third bracket fixing plate, respectively.

[0025] The present invention also provides a method for prefabricating and installing a bridge substructure, based on the above-mentioned bridge substructure prefabrication and installation device, comprising the following steps:

[0026] S1. Precast pier segments, tie beam segments and cap beam segments. Pier segments include pier column segments and tie beam segments. Cap beam segments include cap beam column segments and cap beam mid-span segments.

[0027] S2. Mark the pier positions of each bridge pier and mark the placement position of the climbing load-bearing system. Install the prefabricated installation device for the bridge substructure so that the climbing load-bearing system is placed at the placement position and the structural platform is anchored with cables.

[0028] S3. Bridge piers are constructed in stages using prefabricated installation devices for the bridge substructure.

[0029] S31. For each construction stage, the pier segments are installed in a pre-marked sequence using a rotary hoisting system to form piers, until the height of the piers installed in the construction stage reaches the preset first set height.

[0030] S32. Use the climbing load-bearing system to drive the structural platform to climb along the pier to a preset second height;

[0031] S33. Repeat steps S31 and S32 until the installation of the bridge piers is completed;

[0032] S4. Use the rotary hoisting system to install the cap beam pier segments onto each pier, and use the rotary hoisting system to install the cap beam mid-span segment between two adjacent cap beam pier segments;

[0033] S5. Install the central tie beam from top to bottom using a rotating hoisting system;

[0034] S51. Keep one lifting mechanism connected to the spreader beam, disconnect the remaining lifting mechanisms from the spreader beam, lower the spreader beam to below the cap beam through the lifting mechanism connected to the spreader beam, and then connect all lifting mechanisms to the spreader beam.

[0035] S52. Use a rotating hoisting system to install the central tie beam segment to the preset installation position, so that the central tie beam segment is fixed to the tie beam segments of the two adjacent piers;

[0036] S53. Keep one lifting mechanism connected to the spreader beam, disconnect the remaining lifting mechanisms from the spreader beam, lower the spreader beam to below the installed central tie beam through the lifting mechanism connected to the spreader beam, or move the lifting mechanism and spreader beam to another installation position through the moving system, and then connect all lifting mechanisms to the spreader beam.

[0037] S54. Repeat steps S52 to S53 to install all the intermediate beam segments in the pre-marked order.

[0038] S6. The structural platform is lowered to the ground along the pier by the climbing load-bearing system, and the prefabricated installation device of the bridge substructure is removed.

[0039] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0040] (1) The present invention sets up a climbing load-bearing system, which lifts the bridge precast components through a rotating hoisting system, and then moves the bridge precast components to the installation position through a moving system for hoisting. This realizes the centralized prefabrication of bridge piers, central beams and cap beam segments into bridge precast components, which are then transported to the site for matching, installation and solidification into a whole. This solves the problem that in the past, the bridge piers, central beams and cap beams of bridges in mountainous areas, especially the piers, central beams and cap beams of high-pier bridges, could only use on-site installation of formwork systems and on-site pouring of concrete. Since all bridge precast components are centrally prefabricated, the product quality of bridge precast components is greatly improved, and the problem of the difficulty in controlling the steel reinforcement protective layer and the low qualification rate of the previous cast-in-place concrete process is completely solved. At the same time, it is more energy-saving and environmentally friendly, saving a lot of construction costs.

[0041] (2) This invention is easy to install and dismantle, can adapt to various geographical environment requirements, improve the quality control, construction safety control, construction cost control of the bridge substructure, and facilitates the promotion and application of bridge construction in different geographical environments and high piers. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the prefabrication and installation device for the bridge substructure of the present invention;

[0043] Figure 2 This is a schematic diagram of the climbing load-bearing system installed on the bridge pier in the prefabrication and installation device for the bridge substructure of the present invention.

[0044] Figure 3 This is a schematic diagram of the screw climbing mechanism in the prefabrication and installation device for the bridge substructure of the present invention.

[0045] Figure 4 This is a schematic diagram showing the connection between the nut assembly and the roller mechanism in the prefabrication and installation device for the bridge substructure of the present invention.

[0046] Figure 5 for Figure 1 Sectional view of AA;

[0047] Figure 6 This is a schematic diagram of the rotating mechanism in the bridge substructure prefabrication and installation device of the present invention;

[0048] Figure 7 for Figure 2 BB section view;

[0049] Figure 8 for Figure 2 CC section view;

[0050] Figure 9 This is a top view of the third platform and the third clamping mechanism in the prefabrication and installation device for the bridge substructure of the present invention;

[0051] Figure 10 This is a schematic diagram of the structure of the first connecting component in the prefabrication and installation device for the bridge substructure of the present invention;

[0052] Figure 11 This is a schematic diagram of the structure of the second connecting component in the prefabrication and installation device for the bridge substructure of the present invention;

[0053] Figure 12 This is a schematic diagram of the third connecting component in the prefabrication and installation device for the bridge substructure of the present invention;

[0054] Figure 13This is a construction flowchart of the prefabrication and installation method for the bridge substructure of the present invention. In the flowchart, Figure ① is a schematic diagram of the installation of the pier column segment; Figure ② is a schematic diagram of the installation of the pier column segment after climbing; Figure ③ is a schematic diagram of the installation of the cap beam segment; and Figure ④ is a schematic diagram of the installation of the tie beam segment.

[0055] Figure 14 This is a sectional view of the installation of the tie beam segment in the prefabrication and installation construction method of the bridge substructure of the present invention.

[0056] In the diagram, 1-Structural platform, 11-Main beam platform, 12-First platform, 13-Second platform, 14-Third platform, 15-Support frame, 16-Third clamping mechanism, 17-U-shaped frame, 18-First movable frame, 19-Fixed frame, 110-Second movable frame, 2-Climbing load-bearing system, 21-First clamping mechanism, 22-Second clamping mechanism, 23-Screw climbing mechanism, 231-Screw support, 232-Transmission screw, 233-Nut assembly, 234-Drive assembly, 2341-Motor, 2342-Reduction gearbox, 2343-Second fulcrum plate, 2 344-Coupling, 235-Bearing assembly, 2351-Bearing seat plate, 2352-First thrust bearing, 2353-First locking element, 2354-First fulcrum plate, 2355-Second thrust bearing, 2356-Centering plate, 2357-Second locking element, 24-Roller mechanism, 241-Roller assembly, 2411-Roller connecting plate, 2412-Balance roller, 242-Elastic component, 2421-Adjusting screw, 2422-Pressure spring, 2423-Pressure plate, 2424-Pressure nut, 25-First arc-shaped module, 26-Second arc-shaped module Block, 27-Third arc module, 28-Pull-open jack, 3-Moving system, 31-Rail, 32-Transfer trolley, 4-Rotating hoisting system, 41-Hoisting mechanism, 411-Winder, 412-Wire rope, 413-Fixed pulley block, 414-Modible pulley block, 42-Spreader beam, 43-Rotating mechanism, 431-First rotating steel frame, 432-Power unit, 433-Planar bearing, 434-Second rotating steel frame, 44-Lifting device, 5-Control system, 6-First connecting assembly, 61-Fourth bracket steel plate, 62-Second bracket upper suspension plate, 63-Second 7-Second connecting component, 71-First corbel steel plate, 72-First corbel connecting plate, 73-First corbel fixing plate, 8-Third connecting component, 81-Second corbel steel plate, 82-Third corbel steel plate, 83-Second corbel fixing plate, 84-First corbel upper suspension plate, 85-First corbel lower suspension plate, 86-Third corbel fixing plate, 9-Fourth connecting component, 10-Pier, 101-Pier column segment, 102-Pier tie beam segment, 20-Cap beam, 201-Cap beam pier segment, 202-Cap beam mid-span segment, 30-Middle tie beam segment. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0058] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0059] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this invention, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0060] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0061] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use. They are only for the convenience of describing this invention and simplifying 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 this invention.

[0062] Please see Figure 1 , Figure 1This is a schematic diagram of the prefabrication and installation device for bridge substructure according to the present invention. The device includes a structural platform 1, a climbing load-bearing system 2, a moving system 3, a rotating hoisting system 4, and a control system 5. The structural platform 1 has a through hole for the bridge pier 10 to pass through. The climbing load-bearing system 2 is located outside the bridge pier 10 and connected to the structural platform 1, used to drive the structural platform 1 to move up and down along the bridge pier 10. There are at least two climbing load-bearing systems 2. The moving system 3 is located on the structural platform 1 and can move along the structural platform 1. The rotating hoisting system 4 includes a lifting mechanism 41, a spreader beam 42, a rotating mechanism, and a lifting device 44. There are at least two lifting mechanisms 41, spaced apart on the moving system 3. The lifting mechanism 41 is detachably connected to the spreader beam 42 and used to drive the spreader beam 42 to rise and fall. The rotating mechanism is connected to both the spreader beam 42 and the lifting device 44, used to drive the lifting device 44 to rotate. The control system 5 is connected to the climbing load-bearing system 2, the moving system 3, and the rotating hoisting system 4.

[0063] Please refer to the following: Figure 2 , Figure 2 This is a schematic diagram of the climbing load-bearing system installed on the bridge pier in the prefabrication and installation device for the bridge substructure of the present invention. Two or more climbing load-bearing systems 2 are respectively installed on corresponding piers 10. In one embodiment, the climbing load-bearing system 2 includes a first clamping mechanism 21 and a second clamping mechanism 22 that are vertically spaced outside the pier 10 and used to clamp or release the pier 10, and two screw climbing mechanisms 23 installed on both sides of the pier 10. The screw climbing mechanism 23 includes a screw support 231, a transmission screw 232, a nut assembly 233 and a drive assembly 234. The top end of the screw support 231 is connected to the structural platform 1, and its bottom end is connected to the second clamping mechanism 22. The transmission screw 232 is installed inside the screw support 231 through a bearing assembly 235. The transmission screw 232 is rotatably connected to the bearing assembly 235. The drive assembly 234 is connected to the transmission screw 232 and is used to drive the transmission screw 232 to rotate. The nut assembly 233 is threadedly connected to the transmission screw 232 and moves along the transmission screw when the transmission screw 232 rotates. The nut assembly 233 is connected to the first clamping mechanism 21. Two climbing load-bearing systems 2 are respectively installed on the two piers 10 in the longitudinal direction of the bridge to make the lifting and lowering of the structural platform 1 more stable. The first clamping mechanism 21 is located above the second clamping mechanism 22. By clamping or releasing the pier 10 in turn through the first clamping mechanism 21 and the second clamping mechanism 22, the first clamping mechanism 21 and the second clamping mechanism 22 take turns to become a fulcrum during the climbing process. Thus, the support point of the structural platform 1 on the pier 10 can be transferred to the first clamping mechanism 21 and the second clamping mechanism 22 respectively. Then, by driving the transmission screw to rotate, the nut assembly 233 and the transmission screw 232 move relative to each other, thus completing the climbing function of the structural platform 1.

[0064] Please refer to the following: Figure 3 , Figure 3This is a schematic diagram of the screw climbing mechanism in the prefabrication and installation device for the bridge substructure of the present invention. In one embodiment, the bearing assembly 235 includes a bearing seat plate 2351, a first thrust bearing 2352, a first locking member 2353, a first fulcrum plate 2354, a second thrust bearing 2355, an adjustment plate 2356, and a second locking member 2357. The top end of the transmission screw 232 is mounted on the bearing seat plate 2351 via the first thrust bearing 2352. The bearing seat plate 2351 is mounted on the screw support 231. The first locking member 2353 is mounted on the transmission screw 232 and is connected to the first thrust bearing 2354. The transmission screw 232 is connected at point 352. A first fulcrum plate 2354 is sleeved on the outer side of the bottom end of the transmission screw and mounted on the screw support 231. A centering plate 2356 is mounted on the transmission screw 232 and contacts the side of the first fulcrum plate 2354 away from the bearing seat plate 2351. A second thrust bearing 2355 is mounted on the transmission screw 232 and contacts the side of the centering plate 2356 away from the first fulcrum plate 2354. A second locking member 2357 is mounted on the transmission screw 232 and contacts the second thrust bearing 2355. Through the first and second thrust bearings 2352, the transmission screw 232 can rotate under the action of the drive assembly 234. Then, through the first and second locking members 2353 and 2357, the transmission screw 232 is pulled and fixed to the bearing seat plate 2351 and the first fulcrum plate 2354, thereby fixing it to the screw support 231. In actual use, when the transmission screw 232 rotates and the nut assembly 233 rises or falls, the transmission screw 232 is suspended by the upper part as the fulcrum, through the bearing seat plate 2351, the first thrust bearing 2352 and the first locking member 2353, and is in a state of suspension under tension. When the nut assembly 233 is fixed and acts on the transmission screw 232 to rise or fall, the transmission screw 232 is suspended by the nut assembly 233 as the upper fulcrum, through the first fulcrum plate 2354, the second thrust bearing 2355 and the second locking member 2357, which in turn suspends the entire screw bracket 231. This ensures that the transmission screw 232 is always in a state of tension, avoiding the transmission screw 232 from being in a state of pressure during operation, which would cause bending damage to the transmission screw 232. This allows the transmission screw 232 to be made of a relatively thin screw, reducing costs. The centering plate 2356 is used to adjust the center axis of the transmission lead screw. The opening on the first fulcrum plate 2354 is a larger hole than the transmission lead screw 232, and the opening on the centering plate 2356 is a smaller hole that matches the transmission lead screw 232. During installation, the first fulcrum plate 2354 and the centering plate 2356 are not fixed at first. The transmission lead screw 232 is driven to rotate for a period of time so that the center axis of the transmission lead screw 2 is as overlapping and coaxial as possible with the center axis of the drive assembly 234. The optimal center position is found, and then the centering plate 2356 is fixed to the first fulcrum plate 2354 to achieve automatic centering function and reduce center error in the manufacturing and assembly process.In one embodiment, both the first locking member 2353 and the second locking member 2357 are locking nuts.

[0065] In one embodiment, the nut assembly 233 includes a lead screw nut and a nut connecting plate. The lead screw nut is threadedly connected to the transmission lead screw, and the nut connecting plate is sleeved on the outside of the transmission lead screw and disposed on the lead screw nut. The nut connecting plate is connected to the first clamping mechanism 21. When the transmission lead screw 232 rotates, under the constraint of the nut connecting plate, the lead screw nut drives the nut connecting plate to move linearly along the transmission lead screw 232.

[0066] Please refer to the following: Figure 4 , Figure 4This is a schematic diagram showing the connection between the nut assembly and the roller mechanism in the prefabrication and installation device for the bridge substructure of the present invention. In one embodiment, the climbing load-bearing system 2 further includes a roller mechanism 24, which includes two roller assemblies 241 and two elastic components 242. The roller assembly 241 includes a roller connecting plate 2411 and a balance roller 2412. The roller connecting plate 2411 is hinged to the bottom end of a nut connecting plate. The balance roller 2412 is rotatably mounted on the roller connecting plate 2411. The elastic component 242 includes an adjusting screw 2421, a pressure spring 2422, a pressure plate 2423, and a pressure nut 2424. The pressure plate 2423 is mounted on the roller connecting plate 2411. The adjusting screw 2421 passes through the pressure plate 2423. The pressure nut 2424 is located above the pressure plate 2423 and is threadedly connected to the adjusting screw 2421. The pressure spring 2422 is sleeved on the outside of the adjusting screw 2421. The two ends of the pressure spring 2422 are respectively connected to the pressure plate 2423 and the nut connecting plate. By adjusting the threads of the adjusting screw 2421 and the adjusting nut, the length of the adjusting screw 2421 extending upward from the pressure plate 2423 can be adjusted. By adjusting the contact between the adjusting screw 2421 and the nut connecting plate, the roller connecting plate 2411 rotates, achieving the displacement of the balance roller 2412 in the planar space. This causes a corresponding change in the contact pressure between the balance roller 2412 and the lead screw support 231, thereby adjusting the supporting force between the balance roller 2412 and the lead screw support 231, and balancing the transmission lead screw 232 and the nut mechanism. The horizontal friction between the components maintains a balanced clearance fit between the threads of the lead screw 232 and the nut mechanism. When there are impurities or unevenness on the side of the lead screw support 231, the adjusting screw 2421 and the nut connecting plate are in an alternating contact or disengagement state. During this process, the pressure spring 2422 increases (compresses) or releases (elongates) stored energy to ensure relative stability between the balance roller 2412 and the side of the lead screw support 2311, reducing vibration and maintaining the thread clearance between the lead screw 232 and the nut mechanism in an optimal state. In one embodiment, there are two roller mechanisms 24, spaced apart. This arrangement further balances the horizontal friction between the lead screw 232 and the nut mechanism, maintaining a balanced clearance fit between their threads.

[0067] In one embodiment, the drive assembly 234 includes a motor 2341, a reduction gearbox 2342, a second fulcrum plate 2343, and a coupling 2344. The output shaft of the motor 2341 is connected to the reduction gearbox 2342, and the reduction gearbox 2342 is connected to the lead screw 232 via the coupling 2344. The second fulcrum plate 2343 is connected to both the reduction gearbox 2342 and the lead screw support 231. The drive assembly 234 can be located at the bottom of the lead screw support 231, and the coupling is connected to the bottom of the lead screw 232. The motor drives the lead screw 232 to rotate through the reduction gearbox and the coupling.

[0068] Please refer to the following: Figure 5 , Figure 5 for Figure 1 Cross-sectional view (AA). In one embodiment, the moving system 3 includes a track 31 mounted on the top of the structural platform 1 and a translation trolley 32 slidably mounted on the track 31. The lifting mechanism 41 includes a winch 411, a wire rope 412 connected to the winch 411, a fixed pulley block 413 mounted on the translation trolley 32, and a movable pulley block 414 detachably mounted on the spreader beam 42. The wire rope 412 passes sequentially around the movable pulley block 414 and the fixed pulley block 413 before being fixed to the movable pulley block 414. The track 31 is arranged along the longitudinal direction of the bridge. The movement of the translation trolley 32 on the track 31 drives the winch 411 to move, thereby driving the spreader beam 42, the rotating mechanism, and the lifting device 44 to move. The winch 411 drives the spreader beam 42 to rise or fall via the wire rope 412, the fixed pulley block 413, and the movable pulley block 414.

[0069] Please refer to the following: Figure 6 , Figure 6 This is a schematic diagram of the rotating mechanism in the prefabrication and installation device for the bridge substructure of the present invention. In one embodiment, the rotating mechanism 43 includes a first rotating steel frame 431, a power unit 432, a plane bearing 433, and a second rotating steel frame 434. The first rotating steel frame 431 is mounted on the spreader beam 42. The power unit 432 is located inside the first rotating steel frame 431 and connected to the second rotating steel frame 434 for driving the second rotating steel frame 434 to rotate. The second rotating steel frame 434 is sleeved on the outside of the first rotating steel frame 431 and connected to the first rotating steel frame 431 through the plane bearing 433. A lifting device 44 is mounted on the second rotating steel frame 434. Under the power of the power unit 432, the second rotating steel frame 434 rotates around the first rotating steel frame 431 with the support of the plane bearing 433.

[0070] Please refer to the following: Figure 7 and Figure 8 , Figure 7 for Figure 2 BB section view, Figure 8 for Figure 2CC sectional view. In one embodiment, the first clamping mechanism 21 is a three-lobed pin-hinged clamping hoist, which includes a first arc-shaped module 25, a second arc-shaped module 26, and a third arc-shaped module 27 hinged in sequence, and a plurality of pull-and-release jacks 28 for locking or unlocking the first arc-shaped module 25 and the third arc-shaped module 27. The second clamping mechanism 22 has the same structure as the first clamping mechanism 21. The structural platform 1 includes a main beam platform 11, two first platforms 12, and two second platforms 13. Through holes are provided on the main beam platform 11. The first platforms 12 and the second platforms 13 are both rectangular frame structures. The first platforms 12 and the second platforms 13 include a U-shaped frame 17 and a first movable frame 18. The two ends of the first movable frame 18 are detachably installed at the two ends of the U-shaped frame 17. The main beam platform 11 and the top of the screw rod bracket 231 are connected. The two first platforms 12 are connected one-to-one with the two first clamping mechanisms 21. The second arc-shaped module 26 of the first clamping mechanism 21 is movably connected to the U-shaped frame 17 of the corresponding first platform 12 through several first connecting components 6. The first arc-shaped module 25 and the third arc-shaped module 27 of the first clamping mechanism 21 are movably connected to the U-shaped frame 17 of the corresponding first platform 12 through the first connecting components 6. The two second platforms 13 are connected one-to-one with the two second clamping mechanisms 22. The second arc-shaped module 26 of the second clamping mechanism 22 is connected to the U-shaped frame 17 of the corresponding second platform 13 through several second connecting components 7. The first arc-shaped module 25 and the third arc-shaped module 27 of the second clamping mechanism 22 are movably connected to the U-shaped frame 17 of the corresponding second platform 13 through the third connecting components 8. The main beam platform 11, the two first platforms 12, and the two second platforms 13 are securely connected as one unit by the climbing load-bearing system 2. The control system 5 can be installed on the second platform 13. The first platform 12 and the second platform 13 are fitted onto the outside of the pier 10. A first movable frame 18 is set on the first platform 12 and the second platform 13. The first arc-shaped module 25 and the third arc-shaped module of the first clamping mechanism 21 are movably connected to the U-shaped frame 17 of the first platform 12 through the first connecting component 6. The first arc-shaped module 25 and the third arc-shaped module 27 of the second clamping mechanism 22 are movably connected to the U-shaped frame 17 of the first platform 12 through the third connecting component 8. This allows the first platform 12 and the second platform 13 to pass through the structural obstacles on the outer side of the pier 10 that are used to install the middle tie beam.

[0071] Please refer to the following: Figure 10 , Figure 11 and Figure 12 , Figure 10 This is a schematic diagram of the first connecting component in the prefabrication and installation device for the bridge substructure of the present invention. Figure 11 This is a schematic diagram of the second connecting component in the prefabrication and installation device for the bridge substructure of the present invention. Figure 12This is a schematic diagram of the third connecting component in the prefabrication and installation device for the bridge substructure of the present invention. In one embodiment, the first connecting component 6 includes a fourth bracket steel plate 61, a second bracket upper suspension plate 62, and a second bracket lower suspension plate 63. The second bracket upper suspension plate 62 is connected to the first platform 12, and the second bracket lower suspension plate 63 is rotatably mounted on the second bracket upper suspension plate 62 and connected to the fourth bracket steel plate 61. The fourth bracket steel plate 61 is connected to the first clamping mechanism 21. The second connecting component 7 includes a first bracket steel plate 71 and two first bracket connecting plates 72 respectively disposed on both sides of the first bracket steel plate 71. One of the two first bracket connecting plates 72 is detachably connected to the second arc-shaped module 26 of the second clamping mechanism 22, and the other first bracket connecting plate 72 is detachably connected to a first bracket fixing plate 73. The first bracket fixing plate 73 is connected to the U-shaped frame 17 of the second platform 13. The third connecting component 8 includes a second bracket steel plate 81, a third bracket steel plate 82, a second bracket fixing plate 83, a first bracket upper suspension plate 84, a first bracket lower suspension plate 85, and a third bracket fixing plate 86. One end of the second bracket steel plate 81 is detachably connected to the first arc-shaped module 25 or the third arc-shaped module 27 of the second clamping mechanism 22. The upper part of the other end of the second bracket steel plate 81 is connected to the third bracket steel plate 82. The first bracket upper suspension plate 84 is disposed at the bottom end of the third bracket steel plate 82. The first bracket lower suspension plate 85 is rotatably disposed on the first bracket upper suspension plate 84 and connected to the third bracket fixing plate 86. The third bracket fixing plate 86 is connected to the U-shaped frame 17 of the second platform 13. Both ends of the second bracket fixing plate 83 are detachably connected to the second bracket steel plate 81 and the third bracket fixing plate 86, respectively. The second bracket lower suspension plate 63 is rotatably connected to the second bracket upper suspension plate 62. When the first clamping mechanism 21 is in the loose state, the first arc-shaped module 25 and the third arc-shaped module 27 of the first clamping mechanism 21 can freely displace and detach from the pier 10. When the first clamping mechanism 21 is tightened, it can realize the fulcrum conversion and support force. During climbing, the second bracket fixing plate 83 can be removed, so that the second platform 13 forms a movable suspension structure through the second bracket steel plate 81, the third bracket steel plate 82, the first bracket upper suspension plate 84, the first bracket lower suspension plate 85, and the third bracket fixing plate 86. When the second clamping mechanism 22 is in the loose state, the first arc-shaped module 25 and the third arc-shaped module 27 of the second clamping mechanism 22 can be rotated and detached from the pier 10. During hoisting, the second bracket fixing plate 83 can be installed to meet the force safety requirements under heavy load conditions.

[0072] Please refer to the following: Figure 9 , Figure 9This is a top view of the third platform and the third clamping mechanism in the prefabrication and installation device for the bridge substructure of the present invention. In one embodiment, the structural platform 1 further includes a third platform 14, a support frame 15, and a third clamping mechanism 16. The third platform 14 is located between two second platforms 13 and is connected to the main beam platform 11 via the support frame 15. The third platform 14 is a rectangular frame structure and includes two oppositely arranged fixed frames 19 and two oppositely arranged second movable frames 110. The two ends of the second movable frames 110 are detachably mounted on the two fixed frames 19, respectively. The two fixed frames 19 of the third platform 14 are respectively connected to the third clamping mechanism 16 via a fourth connecting assembly 9. When there are three piers 10, the addition of the third platform 14, the support frame 15, and the third clamping mechanism 16 allows the third clamping mechanism 16 to clamp or loosen the pier 10 located in the middle, increasing the support points of the structural platform 1 and making the structural platform 1 more stable as a whole. The third platform 14 is equipped with two detachable second movable frames 110, allowing the third platform 14 to pass through structural obstacles on the outer side of the protruding pier 10 used for installing the central tie beam. The fourth connecting assembly 9 is the fifth corbel steel plate.

[0073] Please refer to the following: Figure 13 and Figure 14 , Figure 13 This is a construction flowchart of the prefabrication and installation method for the bridge substructure of the present invention. In the flowchart, Figure ① is a schematic diagram of the installation of the pier column segment; Figure ② is a schematic diagram of the installation of the pier column segment after climbing; Figure ③ is a schematic diagram of the installation of the cap beam segment; and Figure ④ is a schematic diagram of the installation of the tie beam segment. Figure 14 This is a sectional view of the installation of the middle tie beam segment in the bridge substructure prefabrication and installation construction method of the present invention. The present invention also provides a bridge substructure prefabrication and installation construction method, based on the above-mentioned bridge substructure prefabrication and installation device, comprising the following steps:

[0074] S1, precast pier segments, central tie beam segments 30 and cap beam segments, the pier segments include pier column segments 101 and pier tie beam segments 102, the cap beam segments include cap beam pier column segments 201 and cap beam mid-span segments 202;

[0075] In step S1 above, the pier 10, the tie beam, and the cap beam are segmented and matched to facilitate the prefabrication, transportation, and hoisting of the structural segments, while also meeting the original design performance. The pier 10 includes several pier segments connected in sequence. The fixing method between the pier segments can adopt the existing method or the segmented main reinforcement critical method. As for the pier column segments 101 and the tie beam segments 102 in the pier segments, they can be installed according to specific installation needs. The cap beam 20 is composed of several cap beam pier column segments 201 and several cap beam mid-span segments 202. The cap beam pier column segments 201 are used to be set on the pier 10, and the cap beam mid-span segments 202 are used to connect two adjacent cap beam pier column segments 201. The fixing method between the cap beam pier column segments 201 and the pier 10, and the fixing method between the cap beam pier column segments 201 and the cap beam mid-span segments 202, can adopt the existing method.

[0076] S2. Mark the pier positions of each pier 10 and mark the placement position for placing the climbing load-bearing system 2, install the prefabricated installation device for the bridge substructure, so that the climbing load-bearing system 2 is placed at the placement position and the structural platform 1 is anchored with cables.

[0077] In step S2 above, the center line of each pier 10 is laid out and extended to the outside, aligned with the center cross line of each pier, and the two second platforms 13 and the third platform 14 are placed at the corresponding pier positions, so that the climbing load-bearing system 2 is placed at the placement position. Then, the structural platform 1 is anchored by cables, such as wind cables, so that the prefabricated installation device of the bridge substructure is fixed on the ground.

[0078] S3. The bridge piers are constructed in 10 stages using a prefabrication and installation device for the bridge substructure.

[0079] S31. For each construction stage, the pier segments are installed in the order marked in advance using the rotary hoisting system 4 to form pier 10, until the height of the pier 10 installed in the construction stage reaches the preset first set height.

[0080] In step S31 above, the prefabricated pier segments are transported to the area below the structural platform 1. The lifting device 44 is connected to the pier segments, and then the pier segments are lifted by the crane mechanism 41. The pier segments are moved to the corresponding pier positions using the moving system 3, and the rotating mechanism is used to adjust the pier segments to the installation position. If a pier 10 is already installed at the pier position, the pier segments are lowered onto the pier and fixed. If no pier 10 is installed at the pier position, the pier segments are lowered onto the pier and fixed, forming a pier 10. The above steps are repeated to install the pier segments in a pre-marked order until the height of the installed pier 10 reaches a first set height. The first set height can be set according to the height of the prefabricated installation device for the bridge substructure. During construction, both the moving system 3 and the rotating lifting system 4 are controlled by the control system 5.

[0081] S32. Using the climbing load-bearing system 2, the structural platform 1 is driven to climb along the pier 10 to a preset second height;

[0082] In step S32 above, the first clamping mechanism 21 and the second clamping mechanism 22 sequentially clamp or release the pier 10, allowing the first clamping mechanism 21 and the second clamping mechanism 22 to take turns becoming a fulcrum during the climbing process. This allows the support point of the structural platform 1 on the pier 10 to be transferred to the first clamping mechanism 21 and the second clamping mechanism 22 respectively. Then, by driving the transmission screw to rotate, the nut assembly 233 and the transmission screw 232 move relative to each other, completing the climbing function of the structural platform 1. This process is repeated until a preset second height is reached. The second preset height is set based on the first preset height and must ensure that the climbing load-bearing system 2, when clamped on the pier 10, can support the hoisting construction of the prefabricated installation device of the bridge substructure. During climbing, the third clamping assembly releases its contact with the pier 10. After reaching the second preset height, all clamping assemblies are clamped to the pier 10. The climbing of the climbing load-bearing system 2 is controlled by the control system 5.

[0083] S33. Repeat steps S31 and S32 until the installation of pier 10 is completed;

[0084] In step S33 above, the pier segments are installed in a pre-marked sequence using the rotating hoisting system 4 and the moving system 3, thus constructing the pier 10 from bottom to top until the construction of the pier 10 is completed.

[0085] S4. Use the rotary hoisting system 4 to install the cap beam pier column segment 201 onto each pier 10, and use the rotary hoisting system 4 to install the cap beam mid-span segment 202 between two adjacent cap beam pier column segments 201.

[0086] In step S4 above, the specific steps of step S41 are as follows: (1) Transport the cap beam pier segment 201 to the bottom of the structural platform 1, connect the lifting device 44 to the cap beam pier segment 201, then lift the cap beam pier segment 201 by the lifting mechanism 41, and rotate the cap beam pier segment 201 by a preset angle, such as 90 degrees, by the rotating mechanism, and move the cap beam pier segment 201 to the corresponding pier 10 by the moving system 3, and install the cap beam pier segment on the pier 10; (2) Repeat step (1) above, and install all cap beam pier segments 201 in the pre-marked order; (3) Transport the cap beam mid-span segment 202 to the structural platform 1. Below, the lifting device 44 is connected to the mid-span segment 202 of the cap beam, and then the mid-span segment 202 of the cap beam is lifted by the lifting mechanism 41, and the mid-span segment 202 of the cap beam is rotated by a preset angle, such as 90 degrees, by the rotating mechanism, and the mid-span segment 202 of the cap beam is moved to the installation position above by the moving system 3; (4) the mid-span segment 202 of the cap beam is lowered to the two adjacent cap beam pier segments 201 by the lifting mechanism 41, and the mid-span segment 202 of the cap beam is fixed to the two adjacent cap beam pier segments 201; (5) repeat steps (3) to (4), install all the mid-span segments 202 of the cap beam in the pre-marked order, and complete the construction of the cap beam 20.

[0087] S5. Install the central tie beam from top to bottom using the rotating hoisting system 4;

[0088] S51. Keep one lifting mechanism 41 connected to the spreader beam 42, disconnect the remaining lifting mechanisms 41 from the spreader beam 42, lower the spreader beam 42 to below the cap beam 20 through the lifting mechanism 41 connected to the spreader beam 42, and then connect all lifting mechanisms 41 to the spreader beam 42.

[0089] In step S51 above, if there are two lifting mechanisms 41, one lifting mechanism 41 is kept connected to the spreader beam 42, and the fixed pulley block 413 of the other lifting mechanism 41 is disconnected from the spreader beam 42. At this time, the spreader beam 42 is lowered to the bottom of the cap beam 20 through the lifting mechanism 41 connected to the spreader beam 42, so as to install the middle tie beam under the cap beam 20. Then, the fixed pulley block 413 of the lifting mechanism 41 is installed on the spreader beam 42 to hoist the middle tie beam segment 30.

[0090] S52. The central tie beam segment 30 is installed to the preset installation position using the rotating hoisting system 4, so that the central tie beam segment 30 is fixed to the tie beam segments 102 of the two adjacent piers.

[0091] In step S52 above, the specific steps of step S52 are as follows: (1) transport the middle beam segment 30 to the lower part of the installation position, connect the lifting device 44 to the middle beam segment 30, then lift the middle beam segment 30 by the lifting mechanism 41, rotate the middle beam segment 30 by a preset angle by the rotating mechanism, and move the middle beam segment 30 to the upper part of the installation position by the moving system 3; (2) lower the middle beam segment 30 to the installation position by the lifting mechanism 41, so that the middle beam segment 30 is installed on the adjacent two pier tie beam segments 102; (3) fix the middle beam segment 30 to the adjacent two pier tie beam segments 102.

[0092] S53. Keep one lifting mechanism 41 connected to the spreader beam 42, disconnect the remaining lifting mechanisms 41 from the spreader beam 42, lower the spreader beam 42 to the underside of the installed central tie beam through the lifting mechanism 41 connected to the spreader beam 42, or move the lifting mechanism 41 and the spreader beam 42 to another installation position through the moving system 3, and then connect all the lifting mechanisms 41 to the spreader beam 42.

[0093] In step S53 above, after installing one middle beam segment 30, due to the obstruction of the pier 10 or the already installed middle beam segment 30, it is necessary to move the spreader beam 42 below the installed middle beam segment 30 or between two adjacent piers 10. Therefore, one crane mechanism 41 is kept connected to the spreader beam 42, and the fixed pulley block 413 of the other crane mechanism 41 is disconnected from the spreader beam 42. The spreader beam 42 is lowered to the underside of the installed middle beam through the crane mechanism 41 connected to the spreader beam 42, or the crane mechanism 41 and the spreader beam 42 are moved to another installation position, that is, between two adjacent piers 10, through the moving system 3. The fixed pulley block 413 of the crane mechanism 41 is installed on the spreader beam 42 to continue hoisting the middle beam segment 30.

[0094] S54. Repeat steps S52 to S53 to install all the intermediate beam segments 30 in the pre-marked order.

[0095] In step S54 above, the intermediate beam segments 30 between two adjacent piers 10 can be installed from top to bottom. After the intermediate beam segments 30 of the two adjacent piers 10 are completed, the spreader beam 42 is moved between two other adjacent piers 10, and then the intermediate beam segments 30 are installed again in the order from top to bottom. This process is repeated until all intermediate beam segments 30 are installed. For the installation of the cap beam 20 and intermediate beams, compared with the traditional installation method of installing intermediate beams and cap beams from bottom to top, this invention uses a prefabricated installation device for the bridge substructure to install cap beams and intermediate beams in the order from top to bottom. This simplifies the installation process and the installation device, making installation more convenient and faster. It also saves construction costs and facilitates the promotion and application of this invention in different geographical environments and for the construction of high-pier bridges.

[0096] S6. The structural platform 1 is lowered to the ground along the pier 10 by the climbing load-bearing system 2, and the prefabricated installation device of the bridge substructure is removed.

[0097] In step S6 above, after the installation of the pier 10, cap beam 20 and central tie beam is completed, the climbing load-bearing system 2 returns to the ground in the reverse order of the climbing method described above. Then the prefabricated installation device of the bridge substructure can be dismantled. After the prefabricated installation device of the bridge substructure is dismantled, the pier 10, cap beam 20 and central tie beam can be carried out for subsequent construction.

[0098] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0099] (1) The present invention sets up a climbing load-bearing system 2, lifts the bridge precast components through a rotating hoisting system 4, and then moves the bridge precast components to the installation position through a moving system 3 for hoisting. This realizes the centralized prefabrication of bridge piers, central beams and cap beam segments into bridge precast components, which are then transported to the site for matching, installation and solidification into a whole. This solves the problem that in the past, the bridge piers 10, central beams and cap beams 20 of bridges in mountainous areas, especially the bridge piers 10, central beams and cap beams 20 of high-pier bridges, could only use on-site installation of formwork systems and on-site pouring of concrete. Since all bridge precast components are centrally prefabricated, the product quality of bridge precast components is greatly improved, and the problem of the difficulty in controlling the steel reinforcement protective layer and the low qualification rate of the previous cast-in-place concrete process is completely solved. At the same time, it is more energy-saving and environmentally friendly, saving a lot of construction costs.

[0100] (2) This invention is easy to install and dismantle, can adapt to various geographical environment requirements, improve the quality control, construction safety control, construction cost control of the bridge substructure, and facilitates the promotion and application of bridge construction in different geographical environments and high piers.

[0101] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Therefore, any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A bridge substructure precast installation apparatus, characterized by, The utility model relates to a bridge construction system, comprising: a structure platform with a through hole for a pier to pass through; a climbing load-bearing system arranged outside the pier and connected to the structure platform, used to drive the structure platform to move up and down along the pier, the number of the climbing load-bearing system being at least two; a moving system arranged on the structure platform and movable along the structure platform; a rotating hoisting system comprising a hoisting mechanism, a pole beam, a rotating mechanism and a lifting tool, the number of the hoisting mechanism being at least two and arranged on the moving system at intervals, the hoisting mechanism being detachably connected to the pole beam to drive the pole beam to move up and down, the rotating mechanism being connected to the pole beam and the lifting tool respectively to drive the lifting tool to rotate; a control system connected to the climbing load-bearing system, the moving system and the rotating hoisting system respectively; wherein the climbing load-bearing system comprises a first and a second hoop mechanism vertically and spacedly arranged outside the pier to clamp or release the pier, and two screw rod climbing mechanisms arranged on both sides of the pier, the screw rod climbing mechanism comprising a screw rod support, a transmission screw rod, a nut assembly and a driving assembly, the top end of the screw rod support being connected to the structure platform, the bottom end being connected to the second hoop mechanism, the transmission screw rod being arranged in the screw rod support through a bearing assembly, the transmission screw rod being rotatably connected to the bearing assembly, the driving assembly being connected to the transmission screw rod to drive the transmission screw rod to rotate, the nut assembly being threadedly connected to the transmission screw rod to move along the transmission screw rod when the transmission screw rod rotates, the nut assembly comprising a screw rod nut and a nut connecting plate, the screw rod nut being threadedly connected to the transmission screw rod, the nut connecting plate being arranged outside the transmission screw rod and on the screw rod nut, the nut connecting plate being connected to the first hoop mechanism; the climbing load-bearing system further comprising a roller mechanism, the roller mechanism comprising two roller assemblies and two elastic assemblies, the roller assembly comprising a roller connecting plate and a balance roller, the roller connecting plate being hingedly connected to the bottom end of the nut connecting plate, the balance roller being rotatably arranged on the roller connecting plate, the elastic assembly comprising an adjusting screw rod, a pressure spring, a pressure plate and a pressure nut, the pressure plate being arranged on the roller connecting plate, the adjusting screw rod being arranged through the pressure plate, the pressure nut being arranged above the pressure plate and threadedly connected to the adjusting screw rod, the pressure spring being arranged outside the adjusting screw rod, the two ends of the pressure spring being connected to the pressure plate and the nut connecting plate respectively.

2. The bridge substructure pre-fabricated installation apparatus according to claim 1, wherein, The bearing assembly comprises a bearing seat plate, a first thrust bearing, a first locking piece, a first fulcrum plate, a second thrust bearing, a centering plate and a second locking piece, the top end of the transmission screw rod is arranged on the bearing seat plate through the first thrust bearing, the bearing seat plate is arranged on the screw rod support, the first locking piece is arranged on the transmission screw rod and is in contact with the first thrust bearing, the first fulcrum plate is sleeved outside the bottom end of the transmission screw rod and is arranged on the screw rod support, the centering plate is arranged on the transmission screw rod and is arranged on the side of the first fulcrum plate away from the bearing seat plate in a detachable manner, the second thrust bearing is arranged on the transmission screw rod and is in contact with the side of the centering plate away from the first fulcrum plate, and the second locking piece is arranged on the transmission screw rod and is in contact with the second thrust bearing.

3. The bridge substructure pre-fabricated installation apparatus according to claim 1, wherein, The moving system comprises a track arranged at the top end of the structure platform and a translation trolley slidingly arranged on the track, the hoisting mechanism comprises a winch, a steel wire rope connected with the winch, a fixed pulley block arranged on the translation trolley and a movable pulley block arranged on the carrying beam in a detachable manner, and the steel wire rope is fixed on the movable pulley block after passing through the movable pulley block and the fixed pulley block in sequence.

4. The bridge substructure pre-fabricated installation apparatus according to claim 1, wherein, The rotating mechanism comprises a first rotating steel frame, a power unit, a plane bearing and a second rotating steel frame, the first rotating steel frame is arranged on the carrying beam, the power unit is arranged in the first rotating steel frame and is connected with the second rotating steel frame, used for driving the second rotating steel frame to rotate, the second rotating steel frame is sleeved outside the first rotating steel frame and is connected with the first rotating steel frame through the plane bearing, and the lifting tool is arranged on the second rotating steel frame.

5. The bridge substructure pre-installation device of claim 1, wherein, The first hoop mechanism is a three-leaf pin hinge type hoop, the three-leaf pin hinge type hoop comprises a first arc-shaped module, a second arc-shaped module and a third arc-shaped module which are sequentially hinged, and a plurality of pull-together jacks used for locking and fixing or unlocking and separating the first arc-shaped module and the third arc-shaped module, the second hoop mechanism has the same structure as the first hoop mechanism; The structure platform comprises a main beam platform, two first platforms and two second platforms, the through hole is arranged on the main beam platform, the first platform and the second platform are both rectangular frame structures, the first platform and the second platform comprise a U-shaped frame and a first movable frame, two ends of the first movable frame are detachably mounted at two ends of the U-shaped frame, the main beam platform is connected with the top end of the screw rod support, the two first platforms are respectively corresponding to the two first hoop mechanisms, the second arc-shaped module of the first hoop mechanism is movably connected with the U-shaped frame of the corresponding first platform through a plurality of first connecting assemblies, and the first arc-shaped module and the third arc-shaped module of the first hoop mechanism are movably connected with the U-shaped frame of the corresponding first platform through the first connecting assemblies respectively; The two second platforms are respectively corresponding to the two second hoop mechanisms, the second arc-shaped module of the second hoop mechanism is connected with the U-shaped frame of the corresponding second platform through a plurality of second connecting assemblies, and the first arc-shaped module and the third arc-shaped module of the second hoop mechanism are movably connected with the U-shaped frame of the corresponding second platform through third connecting assemblies respectively.

6. The bridge substructure pre-fabricated installation apparatus according to claim 5, wherein, The structural platform further comprises a third platform, a support frame and a third hoop mechanism, the third platform is located between the two second platforms and is connected with the main beam platform through the support frame, the third platform is a rectangular frame structure, the third platform comprises two oppositely arranged fixed frames and two oppositely arranged second movable frames, the two ends of the second movable frame are respectively detachably mounted on the two fixed frames, and the two fixed frames of the third platform are connected with the third hoop mechanism through fourth connecting assemblies.

7. The bridge substructure pre-fabricated installation apparatus according to claim 5, wherein, The first connecting assembly comprises a fourth corbel steel plate, a second corbel upper hanging plate and a second corbel lower hanging plate, the second corbel upper hanging plate is connected with the first platform, the second corbel lower hanging plate is rotationally arranged on the second corbel upper hanging plate and is connected with the fourth corbel steel plate, and the fourth corbel steel plate is connected with the first hoop mechanism; The second connecting assembly comprises a first corbel steel plate and two first corbel connecting plates arranged on the two sides of the first corbel steel plate respectively, one of the first corbel connecting plates is detachably connected with the second arc-shaped module of the second hoop mechanism, the other first corbel connecting plate is detachably connected with a first corbel fixed plate, and the first corbel fixed plate is connected with the U-shaped frame of the second platform; The third connecting assembly comprises a second corbel steel plate, a third corbel steel plate, a second corbel fixed plate, a first corbel upper hanging plate, a first corbel lower hanging plate and a third corbel fixed plate, one end of the second corbel steel plate is detachably connected with the first arc-shaped module or the third arc-shaped module of the second hoop mechanism, the other end of the second corbel steel plate is connected with the third corbel steel plate, the first corbel upper hanging plate is arranged at the bottom end of the third corbel steel plate, the first corbel lower hanging plate is rotationally arranged on the first corbel upper hanging plate and is connected with the third corbel fixed plate, the third corbel fixed plate is connected with the U-shaped frame of the second platform, and the two ends of the second corbel fixed plate are detachably connected with the second corbel steel plate and the third corbel fixed plate respectively.

8. A method of constructing a bridge substructure by prefabrication and installation, based on the bridge substructure prefabrication and installation device according to any one of claims 1 to 7, characterized in that The method comprises the following steps: S1, prefabricating a bridge pier segment, a mid-beam segment and a bent cap segment, the bridge pier segment comprises a pier column segment and a pier beam segment, and the bent cap segment comprises a bent cap column segment and a bent cap mid-span segment; S2, marking the pier positions of each bridge pier and marking the placement positions for placing a climbing load-bearing system, installing a bridge substructure prefabricated installation device, placing the climbing load-bearing system at the placement positions and anchoring the structural platform with a cable; S3, constructing the bridge piers in stages through the bridge substructure prefabricated installation device; S31, for each construction stage, installing the bridge pier segments in the order marked in advance by using a rotating hoisting system to form a bridge pier until the height of the bridge pier installed in the construction stage reaches a preset first set height; S32, driving the structural platform to climb along the bridge pier by a preset second set height by using the climbing load-bearing system; S33, repeating steps S31 and S32 until the installation of the bridge pier is completed; S4, installing the bent cap column segments on each bridge pier by using the rotating hoisting system and installing the bent cap mid-span segments between adjacent two bent cap column segments by using the rotating hoisting system; S5, installing the mid-beam from top to bottom by using the rotating hoisting system; S51, reserving one hoisting mechanism connected with the beam, and disconnecting the rest of the hoisting mechanisms from the beam, lowering the beam to the position below the bent cap by the hoisting mechanism connected with the beam, and then connecting all the hoisting mechanisms with the beam; S52, installing the mid-beam segment to the preset installation position by using the rotating hoisting system, so that the mid-beam segment is fixed with the two adjacent pier-beam segments; S53, reserving one hoisting mechanism connected with the beam, and disconnecting the rest of the hoisting mechanisms from the beam, lowering the beam to the position below the installed mid-beam by the hoisting mechanism connected with the beam, or moving the hoisting mechanism and the beam to another installation position by the moving system, and then connecting all the hoisting mechanisms with the beam; S54, repeating steps S52 to S53 to install all the mid-beam segments in the order marked in advance; S6, lowering the structural platform along the pier to the ground by the climbing load-bearing system, and removing the prefabricated installation device of the lower structure of the bridge.

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