Bridge pier climbing formwork construction system and construction method thereof

Abstract

The application provides a bridge pier column climbing formwork construction system and a construction method thereof. The bridge pier column climbing formwork construction system comprises a climbing device, a guide frame, a construction elevator and a formwork system. The climbing device is installed on a completed bridge pier column and can move up and down along the bridge pier column. The guide frame is installed on the climbing device and can be driven by the climbing device to move up and down along the bridge pier column. The formwork system is installed on the climbing device by gravity and can be driven by the climbing device to move up and down along the bridge pier column. The construction elevator comprises a construction elevator operation platform and a ring-shaped lifting point frame. The ring-shaped lifting point frame is installed at the top of the guide frame, and the construction elevator operation platform is hoisted on the ring-shaped lifting point frame by a steel wire rope. The construction elevator operation platform can move up and down along the completed bridge pier column and the guide frame. The bridge pier column climbing formwork construction system and the construction method thereof can ensure the construction progress of the bridge pier, save the construction cost, improve the construction efficiency and reduce the labor intensity.

Description

Technical Field

[0001] This invention relates to the field of bridge pier construction technology, and in particular to a bridge pier climbing formwork construction system and its construction method. Background Technology

[0002] In bridge design, column piers are a commonly used structural type. Pier construction is one of the key control points in bridge construction. Among the existing technologies, the most common methods for bridge pier construction are hydraulic self-climbing formwork and flip-formwork construction.

[0003] The traditional construction method for highway bridges and municipal viaducts has been to use segmented formwork connected by bolts to form an integral formwork system. Each time the formwork is raised, manual labor is required to loosen the bolts at high altitude, which poses a significant safety hazard and is time-consuming and labor-intensive. Building safety barriers or ladder access around the structure requires substantial cost and a long construction period, resulting in high construction costs.

[0004] Recently, new types of climbing formwork devices have emerged, such as the Chinese patent application with publication number CN113403946 A, which discloses a three-leaf pin-hinged bridge column pier climbing formwork device. It adopts a three-leaf template structure and uses the up-and-down movement of a continuous tapered pin to achieve the closing and opening of the template. It uses a hydraulic jacking and fulcrum conversion system to realize the self-climbing and lowering function of the template system. At the same time, the climbing ladder rises and falls together with the fulcrum conversion system. By adding or removing standard ladder segments at low positions, high-altitude operations are reduced. Compared with traditional purely mechanical operations, the technical solution of this patent application achieves a certain degree of automation, greatly reduces high-altitude operations, and improves construction safety.

[0005] However, the existing bridge pier construction devices and methods have the following obvious drawbacks:

[0006] I. In the technical solution of patent publication number CN113403946 A, the template is designed with multiple operating platforms and has a large number of installation modules. Although the ladder is changed to a low-position installation, the number of ladder modules has not decreased. Furthermore, as the height of the pier increases, the swaying of the ladder passage will significantly increase. In addition, the ladder is side-mounted on the fulcrum conversion system, causing uneven stress on the fulcrum conversion system, which may scratch the surface of the pier.

[0007] Second, the system installation, disassembly, and transportation in the technical solution with patent publication number CN113403946 A are still quite complex.

[0008] Third, in the technical solution with patent publication number CN113403946 A, the crawling device still requires manual labor to disassemble and install mechanical locking bolts at high altitudes, and the degree of automation is not high.

[0009] Therefore, the market urgently needs a bridge pier climbing formwork construction system that can solve the problems in existing technologies, overcome the shortcomings of existing bridge pier construction methods and devices, and achieve fewer transportation modules, higher automation, higher operation efficiency, higher safety and reliability, and lower construction costs. Summary of the Invention

[0010] To address the problems in the prior art, this invention provides a bridge pier climbing formwork construction system that is beneficial for saving construction costs, improving construction efficiency, and reducing the intensity of construction labor.

[0011] To achieve the above objectives, the present invention provides the following technical solution: a bridge pier climbing formwork construction system, comprising a crawler, a guide frame, a construction hoist, and a formwork system; the crawler is installed on the completed bridge pier and can move up and down along the bridge pier; the guide frame is installed on the crawler and can be driven by the crawler to move up and down along the bridge pier; the formwork system is installed on the crawler by its own weight and can be driven by the crawler to move up and down along the bridge pier; the construction hoist includes a construction hoist operating platform and a ring-shaped lifting point frame, the ring-shaped lifting point frame is installed at the top of the guide frame, the construction hoist operating platform is suspended on the ring-shaped lifting point frame by steel wire rope, and the construction hoist operating platform can move up and down along the completed bridge pier and the guide frame.

[0012] In a preferred embodiment, the bridge pier climbing formwork construction system further includes a wind cable frame, which is installed on the formwork system and the wind cable frame and the formwork system are connected by a variable floating connection; the top of the wind cable frame is provided with multiple wire rope hanging points, and the wind cable frame is fixed to the ground by wire ropes connected to the wire rope hanging points.

[0013] In a preferred embodiment, the variable floating connection between the wind cable frame and the template system includes a T-shaped sliding plate disposed at the bottom of the wind cable frame, a sliding cover plate mounted on the template system, and a sliding base plate mounted on the template system; the sliding cover plate and the sliding base plate form a cavity for the T-shaped sliding plate to slide; when the template system is closed, the outer sides of the T-shaped sliding plate and the sliding cover plate abut against each other, and the steel wire rope on the wind cable frame transmits the force to the template system, stabilizing the wind cable frame and the template system, and at this time, there is a certain gap between the inner sides of the T-shaped sliding plate and the sliding cover plate.

[0014] In a preferred embodiment, a detachable straightening device is provided at the contact point between the wind cable frame and the reinforcing cage of the completed bridge pier. This straightening device includes a boat-shaped contact plate with inclined surfaces at both its upper and lower ends. The boat-shaped contact plate is connected to the wind cable frame via pins that engage with pin holes on the wind cable frame. The wind cable frame has multiple pin holes that engage with the boat-shaped contact plate. During operation, after the wind cable frame is hoisted, the boat-shaped contact plate of the straightening device contacts the reinforcing cage on the completed bridge pier, thus straightening the wind cable frame and the formwork system. When disassembly is required after construction, if the wind cable frame needs to be lowered along with the formwork system, the operator uses a construction hoist to access the site and disassemble the boat-shaped contact plate.

[0015] In a preferred embodiment, the crawler is provided with friction blocks located at the contact point between the template system and the crawler; and the crawler is also equipped with vertical blocks that limit the radial position of the template system and horizontal blocks that limit the vertical position of the template system; the friction blocks, vertical blocks, and horizontal blocks are combined to form a U-shaped groove for mounting the template system on the crawler.

[0016] In a preferred embodiment, multiple sets of crawler guide devices are installed on both the upper and lower parts of the crawler. Each crawler guide device includes a hollow support, roller, pin, connecting rod, pull rod, and spring mounted on the crawler. The connecting rod is rotatably mounted on the support via the pin. The roller is rotatably mounted on one end of the connecting rod, and the pull rod is mounted on the other end of the connecting rod. The spring is sleeved on the pull rod, with one end of the spring abutting against a flange on the pull rod, and the other end of the spring abutting against the hollow support. The connecting rod mounted on the support via the pin, the roller mounted on one end of the connecting rod, and the pull rod with the spring mounted on the other end of the connecting rod collectively form a lever structure.

[0017] In a preferred embodiment, multiple sets of crawler guide devices are installed on both the upper and lower parts of the crawler. Each crawler guide device includes a sleeve mounted on the crawler, and a roller shaft and a wheel inserted within the sleeve. The roller shaft can slide within the sleeve. One end of the roller shaft is threaded and detachably fitted with a stop nut, while the other end of the roller shaft is provided with a roller support. The roller is rotatably mounted on the roller support. A spring is sleeved on the roller shaft, with one end of the spring abutting against the sleeve and the other end of the spring abutting against the roller support.

[0018] In the preferred technical solution, the crawler can be integrated with a fall protection device to achieve fall protection function.

[0019] In a preferred embodiment, the crawler includes two clamps arranged vertically; a drive device is connected between the two clamps to drive the clamps to move up and down; each clamp is equipped with a clamp locking device, which can lock or release the clamp.

[0020] The clamp locking device includes a clamp locking cylinder, a clamp pull rod, a clamp sleeve, a disc spring, a cover plate, and a pull rod bolt. The disc spring is sleeved on the clamp pull rod, and the clamp sleeve is sleeved on the disc spring. One end of the disc spring abuts against the clamp pull rod, and the other end abuts against the clamp sleeve. One end of the clamp sleeve is fixedly connected to the cylinder body of the clamp locking cylinder, and the other end of the clamp sleeve is fixedly connected to one end of the clamp to be locked. The cover plate is fixedly connected to the other end of the clamp to be locked. The clamp pull rod is equipped with a bolt that engages with the pull rod bolt. The internal thread of the tie rod bolt passes through the cover plate and engages with the internal thread on the clamp tie rod. Rotating the tie rod bolt causes the other end of the clamp to be locked to move closer to the other end of the clamp to be locked, thus locking the clamp. The piston of the clamp locking cylinder can abut or disengage from the clamp tie rod, driving the clamp tie rod to move within the clamp sleeve, causing the other end of the clamp to be locked to move away from or closer to the other end of the clamp to be locked, thus loosening or locking the clamp.

[0021] In a preferred embodiment, a pressure plate can be detachably installed on the cover plate; after the pressure plate is installed in place, it abuts against the nut of the tie rod bolt.

[0022] In a preferred embodiment, the construction hoist operating platform is equipped with multiple sets of variable diameter guide mechanisms, the variable diameter guide mechanisms including fixed guide wheel sets and telescopic guide wheel sets;

[0023] The fixed guide wheel assembly includes a fixed bracket and an elastic guide wheel assembly, wherein the elastic guide wheel assembly is installed on the operating platform of the construction hoist via the fixed bracket.

[0024] The telescopic guide wheel assembly includes a drive mechanism (which can be a telescopic hydraulic cylinder or an electric cylinder), a telescopic bracket, and an elastic guide wheel assembly. The elastic guide wheel assembly is mounted on the construction hoist platform via the telescopic bracket. The telescopic bracket includes a slide rail and a sliding support. The slide rail is mounted on the construction hoist operating platform, and the elastic guide wheel assembly of the telescopic guide wheel assembly is mounted on the sliding support. The drive mechanism can drive the sliding support to slide on the slide rail, thereby driving the elastic guide wheel assembly of the telescopic guide wheel assembly to move.

[0025] The elastic guide wheel assembly includes a sleeve, a roller shaft and a roller passing through the sleeve; the roller shaft can slide within the sleeve; a stop nut is detachably installed at one end of the roller shaft, and a roller support is provided at the other end of the roller shaft; the roller is rotatably mounted on the roller support; a spring is sleeved on the roller shaft, one end of the spring abuts against the sleeve, and the other end of the spring abuts against the roller support.

[0026] Another object of the present invention is to provide a method for climbing formwork construction of bridge piers, which includes the following steps:

[0027] Step S1: Install the bridge pier climbing formwork construction system

[0028] S1a. Install the crawler onto the bridge pier column that has been reinforced with steel cage and has been poured to a certain height;

[0029] S1b. Fit the formwork system onto the bridge pier from the top and place it on top of the crawler;

[0030] S1c. Install the guide frame onto the crawler;

[0031] S1d. Install construction hoist;

[0032] S1e. Complete the functional debugging of the crawler, formwork, and construction hoist;

[0033] S1f. Insert the wind cable frame from the top to complete the connection with the formwork system;

[0034] Step S2: Pouring concrete for bridge piers

[0035] S2a. After the climbing formwork construction system is installed, the formwork system is closed and the crawler is locked;

[0036] S2b. Straighten the formwork system, inspect the reinforcing cage, and secure the wire ropes on the wind cable frame;

[0037] S2c. Pouring the first section of concrete for the bridge pier;

[0038] Step S3: Install the next section of the rebar cage.

[0039] Once the concrete strength meets the construction requirements, install the next standard section of the steel cage. After the work is completed, the construction hoist operating platform is lowered to its lowest position.

[0040] Step S4: Climbing of the bridge pier climbing formwork construction system

[0041] S4a. After the construction hoist operating platform is lowered to the lowest position, release a certain length of the steel wire rope on the construction hoist to ensure that the construction hoist operating platform is not lifted up during the process of the crawler driving the formwork system to climb.

[0042] S4b. When the concrete strength reaches the construction requirements, the formwork system shall be opened in a timely manner and the formwork system shall be separated from the bridge piers.

[0043] S4c. The lower clamp of the crawler remains locked, the upper clamp of the crawler is released by remote operation, and the crawler's drive device drives the upper clamp to move upward, raising the formwork system and wind cable frame by one stroke.

[0044] S4d. The upper clamp of the remotely operated crawler is locked, and the lower clamp is released. The crawler's drive device drives the lower clamp to move upward, causing the guide frame to rise by one stroke.

[0045] S4e. Repeat steps S4c to S4d until the height is raised to the corresponding predetermined height, remotely operate the crawler to lock, close the formwork system, straighten the formwork system, and pour the next section of bridge pier concrete.

[0046] Step S5: Repeat steps S3 to S4 until the bridge piers are poured.

[0047] Step S6: Dismantling of the climbing formwork construction system for bridge piers

[0048] S6a. Dismantle the wind cable frame and formwork system, and use a crane to lift the wind cable frame from the top of the bridge pier to complete the overall dismantling of the wind cable frame;

[0049] S6b. Lower the construction hoist operating platform to its lowest position;

[0050] S6c. The upper clamp of the crawler remains locked, and the lower clamp is released by remote operation. The crawler's drive unit drives the lower clamp to move downward, causing the guide frame to descend one stroke.

[0051] S6d. The lower clamp of the crawler remains locked, and the upper clamp is released by remote operation. The crawler's drive device drives the upper clamp to move downward, causing the template system to descend one stroke.

[0052] S6e. Repeat steps S6c to S6d to lower the entire bridge pier climbing formwork construction system, after the wind cable frame has been removed, to a low ground level;

[0053] S6f. At a low ground level, dismantle the construction hoist, guide frame, formwork system, and crawler in sequence to complete the dismantling.

[0054] Compared with the prior art, the beneficial effects of the present invention are:

[0055] 1. This invention uses a construction hoist to replace the traditional ladder and fixed operating platform, significantly reducing the number of transportation and installation modules in the entire system and improving installation efficiency. The construction hoist is designed as a ring platform, enabling full coverage of the working surface across the entire column height. Compared to the traditional combination of ladders and fixed operating platforms, it offers the advantage of a wider working range.

[0056] 2. After the upper and lower clamps of the crawler are adjusted to the correct position, they can be locked and opened remotely using automatic mechanical locks. The relative movement between the upper and lower clamps is achieved through a drive device (such as a lifting cylinder), enabling the crawler and its load to climb and descend on their own without the need for other lifting equipment.

[0057] 3. Multiple crawler guide devices are integrated at both the high and low positions of the crawler, which can realize the centering function of the crawler relative to the bridge pier, avoiding the scraping of the pier surface during the crawler's up and down crawling. The contact point between the crawler and the formwork system is designed with a stop block to limit the radial opening range of the formwork system, which can ensure that the gap is uniform when the formwork system opens, avoid the phenomenon of the formwork rubbing against the pier on one side, reduce the jamming during the crawling process, and ensure the aesthetics of the outer surface of the pier.

[0058] 4. The crawler integrates a fall protection device, enabling fall protection. A speed switch senses the crawler's falling speed and sends a signal to energize an electromagnet, causing the hydraulic cylinder of the clamp locking device to depressurize. Under the action of a spring, the upper and lower clamps of the crawler lock together, preventing further descent and enhancing system safety.

[0059] 5. The guide frame is fixed to the lower clamp of the crawler to ensure that there is only one diameter-changing shoulder during the up-and-down movement of the construction hoist. The construction hoist is equipped with multiple sets of diameter-changing guide mechanisms, which include fixed guide wheel sets and telescopic guide wheel sets; the fixed guide wheel sets are located on top, and the telescopic guide wheel sets are located on the bottom. When the construction hoist is at a low position, the rollers of the telescopic guide wheel assembly extend and contact the pier column, guiding the hoist on the bridge pier column (at this time, the fixed guide wheel assembly is suspended, or during the transition of diameter change, the fixed guide wheel assembly guides on the guide frame, while the telescopic guide wheel assembly guides on the bridge pier column simultaneously). When the construction hoist is at a high position, the telescopic guide wheel assembly retracts, and the fixed guide wheel assembly guides the hoist on the guide frame (or the rollers of the telescopic guide wheel assembly and the fixed guide wheel assembly are flush, and the rollers of the telescopic guide wheel assembly and the fixed guide wheel assembly guide together on the guide frame). In this way, the construction hoist can cover not only the columns that have been poured but also the columns that are about to be poured, ensuring smooth and reliable up-and-down operation.

[0060] 6. The wind cable frame integrates a detachable and adjustable straightening device. The device features a boat-shaped contact plate with inclined surfaces at the top and bottom, preventing obstruction when in contact with the reinforcing cage and avoiding jamming issues during the system's vertical movement. Simultaneously, this straightening device can effectively contact the reinforcing cage of the already cast bridge piers, achieving straightening of the wind cable frame and consequently, straightening and adjusting the formwork system.

[0061] 7. This invention uses a construction hoist instead of traditional ladders and fixed operating platforms, significantly reducing transportation and installation modules. It completely solves the problem that the higher the pier, the greater the difficulty when constructing ladder-assisted access, as previously only requiring the release of a corresponding length of steel wire rope at each lifting height. Construction workers can use the construction hoist to reach higher positions, avoiding the physical exertion of climbing ladders and improving their working environment.

[0062] 8. After the pier construction is completed, the present invention can be used to crawl down to the ground and then dismantle it, which greatly reduces high-altitude operations and improves system safety.

[0063] In summary, the bridge pier climbing formwork system and its construction method of the present invention significantly reduce the construction cost of piers, greatly improve construction efficiency, significantly reduce high-altitude operations, significantly improve safety, and greatly improve the working environment of construction personnel. Attached Figure Description

[0064] Figure 1 This is a schematic diagram of the overall structure of a bridge pier climbing formwork construction system according to the present invention.

[0065] Figure 2 This is a schematic diagram showing the connection relationship between the construction hoist, crawler, and guide frame of the present invention.

[0066] Figure 3 This is a schematic diagram showing the connection relationship between the crawler, template system, and wind cable frame of the present invention.

[0067] Figure 4 This is a partial structural diagram of the connection between the crawler and the template system of the present invention.

[0068] Figure 5 for Figure 4 A magnified structural diagram of part A in the middle.

[0069] Figure 6 This is a partial structural diagram of the connection between the template system and the wind cable frame of the present invention.

[0070] Figure 7 for Figure 6 A magnified structural diagram of section B.

[0071] Figure 8This is a partial structural diagram of the connection between the wind cable frame and the steel cage of the present invention.

[0072] Figure 9 for Figure 8 Enlarged structural diagram of section C.

[0073] Figure 10 This is a schematic diagram of the overall structure of the construction hoist operating platform of the present invention.

[0074] Figure 11 This is a partial structural schematic diagram of the construction hoist operating platform of the present invention.

[0075] Figure 12 This is a schematic diagram illustrating the working principle of the variable diameter guide mechanism of a construction hoist when it is in a low position on a bridge pier.

[0076] Figure 13 This is a schematic diagram illustrating the working principle of the diameter-changing guide mechanism of a construction hoist during the diameter-changing guide transition phase.

[0077] Figure 14 This is a schematic diagram illustrating the working principle of the variable diameter guide mechanism of a construction hoist when the guide frame is at a high position.

[0078] Figure 15 This is a schematic diagram of the telescopic guide wheel assembly of the variable diameter guide mechanism.

[0079] Figure 16 This is a schematic diagram of the overall structure of the elastic guide wheel assembly for telescopic guide wheels.

[0080] Figure 17 This is a cross-sectional structural diagram of a telescopic guide wheel assembly.

[0081] Figure 18 This is a schematic diagram of the overall structure of the crawler of the present invention.

[0082] Figure 19 This is a schematic diagram of the overall structure of the crawler guide device in Example 1.

[0083] Figure 20 This is a cross-sectional structural schematic diagram of the crawler guide device in Example 1.

[0084] Figure 21 This is a schematic diagram of the overall structure of the crawler guide device in other embodiments.

[0085] Figure 22 This is a cross-sectional structural schematic diagram of the crawler guide device in other embodiments.

[0086] Figure 23 This is a schematic diagram of the clamp locking device of the present invention in the locked state.

[0087] Figure 24 This is a schematic diagram of the structure of the clamp locking device of the present invention in the loosened state. Detailed Implementation

[0088] An embodiment of the bridge pier climbing formwork construction system of the present invention will be further described with reference to the accompanying drawings.

[0089] Example 1, such as Figures 1 to 24 As shown, a bridge pier climbing formwork construction system includes a crawler 1, a guide frame 2, a construction hoist 3, and a formwork system 4. The crawler 1 is installed on the completed bridge pier 01 and can move up and down along the bridge pier 01. The guide frame 2 is installed on the crawler 1 and can be driven by the crawler 1 to move up and down along the bridge pier 01. The formwork system 4 is installed on the crawler 1 by its own weight and can be driven by the crawler 1 to move up and down along the bridge pier 01. The construction hoist 3 includes a construction hoist operating platform 31 and a ring-shaped lifting point frame 32. The ring-shaped lifting point frame 32 is installed at the top of the guide frame 2. The construction hoist operating platform 31 is suspended on the ring-shaped lifting point frame 32 by steel wire ropes, and the construction hoist operating platform 31 can move up and down along the completed bridge pier 01 and the guide frame 2.

[0090] The bridge pier climbing formwork construction system also includes a wind cable frame 5, which is installed on the formwork system 4, and the wind cable frame 5 and the formwork system 4 are connected by a variable floating connection; the top of the wind cable frame 5 is provided with multiple wire rope hanging points, and the wind cable frame 5 is fixed to the ground by wire ropes connected to the wire rope hanging points.

[0091] The variable floating connection between the wind cable frame 5 and the template system 4 includes a T-shaped sliding plate 51 at the bottom of the wind cable frame 5, a sliding cover plate 41 installed on the template system 4, and a sliding base plate 42 installed on the template system 4. The sliding cover plate 41 and the sliding base plate 42 form a cavity for the T-shaped sliding plate 51 to slide. When the template system 4 is closed, the outer side of the T-shaped sliding plate 51 abuts against the outer side of the sliding cover plate 41, and the steel wire rope on the wind cable frame 5 transmits the force to the template system 4, stabilizing the wind cable frame 5 and the template system 4. At this time, there is a certain gap between the inner side of the T-shaped sliding plate 51 and the inner side of the sliding cover plate 41.

[0092] A detachable straightening device is provided at the contact point between the cable support frame 5 and the reinforcing cage 02 of the completed bridge pier 01. This straightening device includes a boat-shaped contact plate 52, with inclined surfaces at both the upper and lower ends. The boat-shaped contact plate 52 is connected to the cable support frame 5 via pins. The cable support frame 5 has multiple pin holes that mate with the boat-shaped contact plate 52. During operation, after the cable support frame 5 is hoisted, the boat-shaped contact plate 52 of the straightening device contacts the reinforcing cage 02 on the completed bridge pier 01, thus straightening the cable support frame 5 and the formwork system 4. When disassembly is required after construction, if the cable support frame 5 needs to be lowered along with the formwork system 4, the operator rides the construction hoist 3 to disassemble the boat-shaped contact plate 52.

[0093] The crawler 1 is provided with a friction block 11, which is located at the contact point between the template system 4 and the crawler 1; and the crawler 1 is also equipped with a vertical stop block 12 that restricts the radial position of the template system 4, and a horizontal stop block 13 that restricts the vertical position of the template system 4; the friction block 11, the vertical stop block 12, and the horizontal stop block 13 are combined to form a U-shaped groove on the crawler 1 for installing the template system 4.

[0094] Multiple sets of crawler guide devices are installed on the upper and lower parts of the crawler 1. The crawler guide device includes a hollow support 61, a roller 62, a pin 63, a connecting rod 64, a pull rod 65, and a spring 66 mounted on the crawler 1. The middle of the connecting rod 64 is rotatably mounted on the support 61 through the pin 63. The roller 62 is rotatably mounted on one end of the connecting rod 64, and the pull rod 65 is mounted on the other end of the connecting rod 64. The spring 66 is sleeved on the pull rod 65, and one end of the spring 66 abuts against a flange provided on the pull rod 65, while the other end of the spring 66 abuts against the hollow support 61. The connecting rod 64 mounted on the support 61 through the pin 63, the roller 62 mounted on one end of the connecting rod 64, and the pull rod 65 mounted on the other end of the connecting rod 64 with the spring 66 sleeved on it together form a lever structure.

[0095] Of course, in other embodiments, the crawler guide devices installed on the upper and lower parts of the crawler 1 can also adopt other similar structures, such as... Figure 21 and Figure 22As shown, the crawling guide device includes an elastic guide wheel assembly 8 mounted on the crawler 1. The elastic guide wheel assembly 8 includes a sleeve 81 mounted on the crawler 1, and a roller shaft 82 and a wheel 62 passing through the sleeve 81. The roller shaft 82 can slide within the sleeve 81. A stop nut 83 is detachably mounted on one end of the roller shaft 82, and a roller support 84 is provided on the other end of the roller shaft 82. The roller 62 is rotatably mounted on the roller support 84. A spring 66 is sleeved on the roller shaft 82, with one end of the spring 66 abutting against the sleeve 81 and the other end of the spring 66 abutting against the roller support 84.

[0096] The crawler 1 can be integrated with a fall protection device to achieve fall protection function. For example, by sensing the falling speed of the crawler 1 through a speed switch, a signal is sent to control the electromagnet to be energized, thereby controlling the depressurization of the clamp locking cylinder 71 of the clamp locking device 7. Under the action of the disc spring 74 of the clamp locking device 7, the upper and lower clamps 14 of the crawler 1 are locked, thereby preventing the crawler 1 from falling further and enhancing the safety of the system.

[0097] The crawler 1 includes two clamps 14 arranged vertically; a drive device 15 is connected between the two clamps 14 to drive the clamps to move up and down; each clamp 14 is equipped with a clamp locking device 7, which can lock or release the clamp 14.

[0098] The clamp locking device 7 includes a clamp locking cylinder 71, a clamp pull rod 72, a clamp sleeve 73, a disc spring 74, a cover plate 75, and a pull rod bolt 76. The disc spring 74 is sleeved on the clamp pull rod 72, and the clamp sleeve 73 is sleeved on the disc spring 74. One end of the disc spring 74 abuts against the clamp pull rod 72, and the other end of the disc spring 74 abuts against the clamp sleeve 73. One end of the clamp sleeve 73 is fixedly connected to the cylinder body of the clamp locking cylinder 71, and the other end of the clamp sleeve 73 is fixedly connected to one end of the clamp 14 to be locked. The cover plate 75 is fixedly connected to the other end of the clamp 14 to be locked. The clamp pull rod 72 is provided with a... The internal thread of the tie rod bolt 76 is engaged, and the bolt of the tie rod bolt 76 passes through the cover plate 75 and is connected to the internal thread on the clamp tie rod 72. Rotating the tie rod bolt 76 can drive the other end of the clamp to be locked 14 to move closer to the other end of the clamp to be locked 14, thus locking the clamp to be locked 14. The piston of the clamp locking cylinder 71 can abut or disengage from the clamp tie rod 72, driving the clamp tie rod 72 to move within the clamp sleeve 73, causing the other end of the clamp to be locked 14 to move away from or closer to the other end of the clamp to be locked 14, thus loosening or locking the clamp to be locked 14.

[0099] A pressure plate 77 is detachably installed on the cover plate 75; after installation, the pressure plate 77 abuts against the nut of the tie rod bolt 76. By using a detachable pressure plate 77 on the cover plate 75 (the detachable method can be bolt connection, etc.) to abut against the tie rod bolt 76, when it is necessary to loosen the clamp 14, the force on the clamp tie rod 72 can be directly applied to the cover plate 75 through the tie rod bolt 76 via the pressure plate 77, thereby moving the other end of the clamp 14 to be loosened away from the end of the clamp 14 to be locked, thus loosening the clamp 14. This helps to save the stroke of the clamp locking cylinder 71 when it is loosened, or in other words, when the stroke of the clamp locking cylinder 71 is constant, the loosening gap of the clamp 14 is larger.

[0100] The construction hoist 3 has multiple sets of variable diameter guide mechanisms installed on its construction hoist operating platform 31. The variable diameter guide mechanism includes a fixed guide wheel set 33 and a telescopic guide wheel set 34.

[0101] The fixed guide wheel assembly 33 includes a fixed bracket 35 and an elastic guide wheel assembly 8, wherein the elastic guide wheel assembly 8 is installed on the construction hoist operating platform 31 via the fixed bracket 35.

[0102] The telescopic guide wheel assembly 34 includes a drive mechanism 36 (which can be a telescopic hydraulic cylinder or an electric cylinder; in this embodiment, a telescopic hydraulic cylinder is used), a telescopic bracket 37, and an elastic guide wheel assembly 8. The elastic guide wheel assembly 8 is mounted on the construction hoist platform 31 via the telescopic bracket 37. The telescopic bracket 37 includes a slide rail 38 and a sliding bracket 39. The slide rail 38 is mounted on the construction hoist operating platform 31, and the elastic guide wheel assembly 8 of the telescopic guide wheel assembly 34 is mounted on the sliding bracket 39. The cylinder end of the telescopic hydraulic cylinder 36 is fixed on the construction hoist platform 31, and the piston end of the telescopic hydraulic cylinder 36 is connected to the sliding bracket 39 of the telescopic bracket 37. The telescopic hydraulic cylinder 36 can drive the sliding bracket 39 to slide on the slide rail 38, thereby driving the elastic guide wheel assembly 8 of the telescopic guide wheel assembly 34 to move.

[0103] like Figure 16 and Figure 17 As shown, the elastic guide wheel assembly 8 includes a sleeve 81, a roller shaft 82 and a roller 62 passing through the sleeve 81; the roller shaft 82 can slide within the sleeve 81; a stop nut 83 is detachably installed at one end of the roller shaft 82, and a roller support 84 is provided at the other end of the roller shaft 82; the roller 62 is rotatably mounted on the roller support 84; a spring 66 is sleeved on the roller shaft 82, one end of the spring 66 abuts against the sleeve 81, and the other end of the spring 66 abuts against the roller support 84.

[0104] In this embodiment, the construction method of the bridge pier climbing formwork construction system of the present invention is as follows:

[0105] Step S1: Install the bridge pier climbing formwork construction system

[0106] S1a. Install the crawler onto the bridge pier column that has been reinforced with steel cage and has been poured to a certain height;

[0107] S1b. Fit the formwork system onto the bridge pier from the top and place it on top of the crawler;

[0108] S1c. Install the guide frame onto the crawler;

[0109] S1d. Install construction hoist;

[0110] S1e. Complete the functional debugging of the crawler, formwork, and construction hoist;

[0111] S1f. Insert the wind cable frame from the top to complete the connection with the formwork system;

[0112] Step S2: Pouring concrete for bridge piers

[0113] S2a. After the climbing formwork construction system is installed, the formwork system is closed and the crawler is locked;

[0114] S2b. Straighten the formwork system, inspect the reinforcing cage, and secure the wire ropes on the wind cable frame;

[0115] S2c. Pouring the first section of concrete for the bridge pier;

[0116] Step S3: Install the next section of the rebar cage.

[0117] Once the concrete strength meets the construction requirements, install the next standard section of the steel cage. After the work is completed, the construction hoist operating platform is lowered to its lowest position.

[0118] Step S4: Climbing of the bridge pier climbing formwork construction system

[0119] S4a. After the construction hoist operating platform is lowered to the lowest position, release a certain length of the steel wire rope on the construction hoist to ensure that the construction hoist operating platform is not lifted up during the process of the crawler driving the formwork system to climb.

[0120] S4b. When the concrete strength reaches the construction requirements, the formwork system shall be opened in a timely manner and the formwork system shall be separated from the bridge piers.

[0121] S4c. The lower clamp of the crawler remains locked, the upper clamp of the crawler is released by remote operation, and the crawler's drive device drives the upper clamp to move upward, raising the formwork system and wind cable frame by one stroke.

[0122] S4d. The upper clamp of the remotely operated crawler is locked, and the lower clamp is released. The crawler's drive device drives the lower clamp to move upward, causing the guide frame to rise by one stroke.

[0123] S4e. Repeat steps S4c to S4d until the height is raised to the corresponding predetermined height, remotely operate the crawler to lock, close the formwork system, straighten the formwork system, and pour the next section of bridge pier concrete.

[0124] Step S5: Repeat steps S3 to S4 until the bridge piers are poured.

[0125] Step S6: Dismantling of the climbing formwork construction system for bridge piers

[0126] S6a. Dismantle the wind cable frame and formwork system, and use a crane to lift the wind cable frame from the top of the bridge pier to complete the overall dismantling of the wind cable frame;

[0127] S6b. Lower the construction hoist operating platform to its lowest position;

[0128] S6c. The upper clamp of the crawler remains locked, and the lower clamp is released by remote operation. The crawler's drive unit drives the lower clamp to move downward, causing the guide frame to descend one stroke.

[0129] S6d. The lower clamp of the crawler remains locked, and the upper clamp is released by remote operation. The crawler's drive device drives the upper clamp to move downward, causing the template system to descend one stroke.

[0130] S6e. Repeat steps S6c to S6d to lower the entire bridge pier climbing formwork construction system, after the wind cable frame has been removed, to a low ground level;

[0131] S6f. At a low ground level, dismantle the construction hoist, guide frame, formwork system, and crawler in sequence to complete the dismantling.

[0132] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. It should be noted that any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A bridge pier climbing formwork construction system, characterized in that: It includes a crawler, a guide frame, a construction hoist, and a formwork system. The crawler is installed on the completed bridge piers and can move up and down along the piers. The guide frame is installed on the crawler and can move up and down along the piers. The formwork system is installed on the crawler by its own weight and can move up and down along the piers. The construction hoist includes a construction hoist operating platform and a ring-shaped lifting point frame. The ring-shaped lifting point frame is installed at the top of the guide frame. The construction hoist operating platform is suspended on the ring-shaped lifting point frame by steel wire ropes and can move up and down along the completed bridge piers and the guide frame. It also includes a wind cable frame, which is installed on the formwork system and the wind cable frame and the formwork system are connected by a variable floating connection; the top of the wind cable frame is provided with multiple steel wire rope hanging points, and the wind cable frame is fixed to the ground by steel wire ropes connected to the steel wire rope hanging points; the variable floating connection between the wind cable frame and the formwork system includes a T-shaped sliding plate set at the bottom of the wind cable frame, a sliding cover plate installed on the formwork system, and a sliding bottom plate installed on the formwork system; the sliding cover plate and the sliding bottom plate form a cavity for the T-shaped sliding plate to slide; when the formwork system is closed, the outer side of the T-shaped sliding plate abuts against the outer side of the sliding cover plate, and the steel wire rope on the wind cable frame transmits the force to the formwork system, stabilizing the wind cable frame and the formwork system, and at this time there is a certain gap between the inner side of the T-shaped sliding plate and the inner side of the sliding cover plate; The crawler includes two clamps arranged one above the other; a drive device is connected between the two clamps to drive the clamps to move up and down; each clamp is equipped with a clamp locking device, which can lock or release the clamps. The clamp locking device includes a clamp locking cylinder, a clamp pull rod, a clamp sleeve, a disc spring, a cover plate, and a pull rod bolt. The disc spring is sleeved on the clamp pull rod, and the clamp sleeve is sleeved on the disc spring. One end of the disc spring abuts against the clamp pull rod, and the other end of the disc spring abuts against the clamp sleeve. One end of the clamp sleeve is fixedly connected to the cylinder body of the clamp locking cylinder, and the other end of the clamp sleeve is fixedly connected to one end of the clamp to be locked. The cover plate is fixedly connected to the other end of the clamp to be locked. The clamp pull rod has an internal thread that mates with the pull rod bolt. The bolt of the pull rod passes through the cover plate and mates with the internal thread on the clamp pull rod.

2. The bridge pier climbing formwork construction system according to claim 1, characterized in that: The crawler is equipped with friction blocks located at the contact point between the template system and the crawler; the crawler is also equipped with vertical blocks that limit the radial position of the template system and horizontal blocks that limit the vertical position of the template system; the friction blocks, vertical blocks, and horizontal blocks are combined to form a U-shaped groove on the crawler for installing the template system.

3. The bridge pier climbing formwork construction system according to claim 1, characterized in that: Multiple crawler guide devices are installed on both the upper and lower parts of the crawler. The crawler guide device includes a hollow support, roller, pin, connecting rod, pull rod, and spring mounted on the crawler. The middle of the connecting rod is rotatably mounted on the support via the pin. The roller is rotatably mounted on one end of the connecting rod, and the pull rod is mounted on the other end of the connecting rod. The spring is sleeved on the pull rod, with one end of the spring abutting against a flange on the pull rod and the other end of the spring abutting against the hollow support. The connecting rod mounted on the support via the pin, the roller mounted on one end of the connecting rod, and the pull rod with the spring mounted on the other end of the connecting rod together form a lever structure.

4. The bridge pier climbing formwork construction system according to claim 1, characterized in that: Multiple sets of crawler guide devices are installed on the upper and lower parts of the crawler. The crawler guide device includes a sleeve installed on the crawler, and a roller shaft and a wheel inserted in the sleeve. The roller shaft can slide in the sleeve. One end of the roller shaft is threaded and a stop nut is detachably installed. The other end of the roller shaft is provided with a roller support. The roller is rotatably installed on the roller support. A spring is sleeved on the roller shaft. One end of the spring abuts against the sleeve and the other end of the spring abuts against the roller support.

5. The bridge pier climbing formwork construction system according to claim 1, characterized in that: Rotating the tie rod bolt can bring the other end of the clamp to be locked closer to the first end of the clamp to be locked, thus locking the clamp to be locked; the piston of the clamp locking cylinder can abut or disengage from the clamp tie rod, driving the clamp tie rod to move within the clamp sleeve, causing the other end of the clamp to be locked to move away from or closer to the first end of the clamp to be locked, thus loosening or locking the clamp to be locked.

6. A bridge pier climbing formwork construction system according to claim 5, characterized in that: A pressure plate is also detachably installed on the cover plate; after the pressure plate is installed in place, it abuts against the nut of the tie rod bolt.

7. The bridge pier climbing formwork construction system according to claim 1, characterized in that: The construction hoist operating platform is equipped with multiple sets of variable diameter guide mechanisms, including fixed guide wheel sets and telescopic guide wheel sets; The fixed guide wheel assembly includes a fixed bracket and a flexible guide wheel assembly. The flexible guide wheel assembly is installed on the operating platform of the construction hoist via the fixed bracket. The telescopic guide wheel assembly includes a drive mechanism, a telescopic bracket, and an elastic guide wheel assembly. The elastic guide wheel assembly is mounted on the construction hoist platform via the telescopic bracket. The telescopic bracket includes a slide rail and a sliding support. The slide rail is mounted on the construction hoist operating platform, and the elastic guide wheel assembly of the telescopic guide wheel assembly is mounted on the sliding support. The drive mechanism can drive the sliding support to slide on the slide rail, thereby driving the elastic guide wheel assembly of the telescopic guide wheel assembly to move. The elastic guide wheel assembly includes a sleeve, a roller shaft and a roller passing through the sleeve; the roller shaft can slide inside the sleeve; a stop nut is detachably installed at one end of the roller shaft, and a roller support is provided at the other end of the roller shaft; the roller is rotatably mounted on the roller support; a spring is sleeved on the roller shaft, one end of the spring abuts against the sleeve, and the other end of the spring abuts against the roller support.

8. A method for constructing a bridge pier climbing formwork using the bridge pier climbing formwork construction system of claim 1, characterized in that: It includes the following steps: Step S1: Install the bridge pier climbing formwork construction system S1a. Install the crawler onto the bridge pier column that has been reinforced with steel cage and has been poured to a certain height; S1b. Fit the formwork system onto the bridge pier from the top and place it on top of the crawler; S1c. Install the guide frame onto the crawler; S1d. Install construction hoist; S1e. Complete the functional debugging of the crawler, formwork, and construction hoist; S1f. Slide the cable tray through from the top to complete the connection with the formwork system; Step S2: Pouring concrete for bridge piers S2a. After the climbing formwork construction system is installed, the formwork system is closed and the crawler is locked; S2b. Straighten the formwork system, inspect the reinforcing cage, and secure the wire ropes on the wind cable frame; S2c. Pouring the first section of concrete for the bridge pier; Step S3: Install the next section of the steel cage. Once the concrete strength meets the construction requirements, install the next standard section of the steel cage. After the work is completed, the construction hoist operating platform is lowered to its lowest position. Step S4: Climbing of the bridge pier climbing formwork construction system S4a. After the construction hoist operating platform is lowered to the lowest position, release a certain length of the steel wire rope on the construction hoist to ensure that the construction hoist operating platform is not lifted up during the process of the crawler driving the formwork system to climb. S4b. When the concrete strength reaches the construction requirements, the formwork system shall be opened in a timely manner and the formwork system shall be separated from the bridge piers; S4c. The lower clamp of the crawler remains locked, the upper clamp of the crawler is released by remote operation, and the crawler's drive device drives the upper clamp to move upward, raising the formwork system and wind cable frame by one stroke. S4d. The upper clamp of the remotely operated crawler is locked, and the lower clamp is released. The crawler's drive device drives the lower clamp to move upward, causing the guide frame to rise by one stroke. S4e. Repeat steps S4c to S4d until the height is raised to the corresponding predetermined height, remotely operate the crawler to lock, close the formwork system, straighten the formwork system, and pour the next section of bridge pier concrete. Step S5: Repeat steps S3 to S4 until the bridge piers are poured.

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