Construction method for lifting, rotating, tired splicing and sliding of double-bridge crane

Abstract

The invention relates to a double-bridge crane lifting, rotating, tired splicing and sliding construction method, which belongs to the technical field of steel structures, and comprises the following operation steps of: 1, arranging a sliding guide rail on a splicing site, simultaneously splicing a primary truss end part I and a primary truss end part II, and then hoisting the primary truss end part I and the primary truss end part II onto the sliding guide rail; and 2, splicing the middle section truss, and adopting a bridge crane I and a bridge crane II to complete the integral splicing of the middle section truss. And thirdly, lifting and rotating are conducted through a bridge crane I and a bridge crane II to complete the folding process of the middle-section truss, the main truss end I and the main truss end II, and overall assembly of the main trusses on the two sides is completed. And fourthly, the main trusses on the two sides are slid to the assembly positions through sliding guide rails. And fifthly, after the main truss is in place, the main truss is jacked, the sliding rail is dismantled, and then unloading is conducted, so that the main truss is assembled in place. The installation of the large-span truss is realized by adopting one double-bridge crane, so that the construction method which is time-saving and labor-saving is realized while the safety and the reliability are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of steel structures, and in particular to a double-bridge crane lifting, rotating, assembling and sliding construction method. Background Art

[0002] With the improvement of modern architectural aesthetics and functional requirements, traditional lifting technology has gradually exposed its limitations in terms of accuracy, efficiency and safety. The existing segmented lifting relies on a large number of temporary supports, which is inconsistent with the concept of green construction. Scenarios such as restricted sites in urban core areas (large crawler cranes cannot be used), lifting of ultra-high and ultra-long components (single machine lifting capacity is insufficient), and precise positioning in dense pipeline environments urgently need breakthroughs in new construction technologies.

[0003] The requirements for construction accuracy and efficiency are increased, or the existing equipment cannot meet the needs of certain special scenarios. For example, the research and development background of the present invention is the top equipment structure of a certain underground laboratory, a large-span steel truss, limited construction site, and an experimental pool under the structure. Therefore, due to many restrictions, the structure cannot be constructed using conventional construction methods. Summary of the invention

[0004] The present invention mainly solves the deficiencies in the prior art and provides a double-bridge crane lifting, rotating, accumulating, and sliding construction method, which has the advantages of simple structure, convenient operation, and good running stability. It solves the problem of unsupported in-situ closure and docking of the main truss under limited conditions. A double-bridge crane is used to install a large-span truss, ensuring safety and reliability while realizing a time-saving and labor-saving construction method.

[0005] The above technical problems of the present invention are mainly solved by the following technical solutions:

[0006] A double-bridge crane lifting, rotating, accumulating, assembling and sliding construction method, the double-bridge crane lifting structure includes a pool, an assembly site is arranged outside the pool, a pair of main trusses are arranged above the left and right sides of the assembly site, a bridge crane I and a bridge crane II are arranged between the two main trusses, and sliding guide rails are arranged at both ends of the main trusses. The main trusses include a middle section truss, and the two ends of the middle section truss are respectively provided with a main truss end I and a main truss end II.

[0007] A bridge crane is a type of bridge crane that runs on an elevated track, also known as an overhead crane. The bridge of a bridge crane runs longitudinally along the tracks laid on the elevated tracks on both sides, and the hoisting trolley runs horizontally along the tracks laid on the bridge, forming a rectangular working range, so that the space under the bridge can be fully utilized to lift materials without being hindered by ground equipment. This type of crane is widely used in indoor and outdoor warehouses, factories, docks and open-air storage yards.

[0008] Bridge cranes are generally composed of a bridge (also called a trolley), a lifting mechanism, a trolley, a trolley travel mechanism, an operating room, a trolley conductive device (auxiliary sliding wire), and a crane main power conductive device (main sliding wire).

[0009] The trolley moving mechanism is composed of trolley traction motor, transmission shaft, reducer, wheels, brakes and other components. There are two driving modes: centralized drive and separate drive.

[0010] The trolley is placed on the bridge rails and can move along the width of the workshop. The trolley is mainly welded from steel plates and consists of a trolley frame and the trolley moving mechanism and lifting mechanism on it.

[0011] The trolley moving mechanism consists of the trolley motor, brake, coupling, reducer and wheels, etc. The trolley motor drives the trolley driving wheel through the reducer, dragging the trolley to move along the guide rail. Since the trolley driving wheels are close to each other, they are driven by one motor.

[0012] There are two transmission forms of the vehicle moving mechanism: one is that the reduction box is between the two driving wheels; the other is that the reduction box is installed on one side of the vehicle. The reduction box is installed between the two driving wheels to make the torque on the transmission shaft more uniform; the reduction box is installed on one side of the vehicle to make installation and maintenance more convenient.

[0013] The construction method includes the following steps:

[0014] Step 1: Set up a sliding guide rail on the assembly site, assemble the main truss end I and the main truss end II at the same time, and then hoist the main truss end I and the main truss end II onto the sliding guide rail.

[0015] Step 2: Assemble the middle section truss at a horizontal angle of 18 degrees at the end of the assembly site, and use bridge crane I and bridge crane II to complete the overall assembly of the middle section truss.

[0016] Step 3: Bridge crane I and bridge crane II move vertically synchronously to the top of the lifting points at both ends of the middle section truss to install the slings; bridge crane I and bridge crane II are used to lift and rotate to complete the closing process of the middle section truss and the main truss end I and main truss end II, completing the overall assembly of the main trusses on both sides.

[0017] Step 4: Use sliding guide rails to slide the main trusses on both sides to the assembly position.

[0018] Step 5: After the main truss is in place, it is lifted and the sliding track is removed and then unloaded, so that the main truss can be assembled in place.

[0019] Preferably, bridge crane I and bridge crane II are synchronously moved until bridge crane II passes the rear end of main truss end II, and then bridge crane I is moved around bridge crane II in a single point along a circular route until bridge crane I and bridge crane II are in the same straight line; then bridge crane I and bridge crane II are synchronously moved up and down until the middle section truss is parallel to the docking position of main truss end I and main truss end II at both ends; bridge crane I and bridge crane II are synchronously moved horizontally and positioned to complete the lifting, rotation and closing of the middle section truss and main truss end I and main truss end II.

[0020] As a preferred method, the lifting points of bridge crane I and bridge crane II are symmetrically arranged at the intersection nodes of the upper chords of the middle section truss, so as to solve the problem of horizontal load distribution of the regular-shaped components when the double bridge cranes are jointly lifted. The middle section truss is assembled vertically in sections to solve the problem that the larger the height-to-length ratio of the heavy object, the higher the horizontality exceeds the technical requirements. This avoids the situation where the rate of change of the load of the lifting machinery is higher after the lifting tilts, and the process safety is uncontrollable.

[0021] Under the on-site command, the two cranes will lift at the same time, and the cranes should lift at a uniform speed to avoid sudden acceleration and deceleration. During the lifting process, when the component is raised 200mm, the two cranes will stop lifting the hooks and check whether the slings and hoists are abnormal. If no abnormality is found, continue to command.

[0022] As a preference, when lifting the middle section truss of bridge crane I and bridge crane II, an attitude rotation design is performed to decompose the single and double-technique lifting aerial rotation attitude adjustment paths.

[0023] As a preferred embodiment, the trolley on the bridge crane II moves along the bridge crane track Vt direction, and the trolley on the bridge crane II moves along the bridge crane direction Vs direction. The two directions move at a uniform speed at the same time. According to the principle of theoretical mechanics, the hanging point moves in the tangential direction along the circumference of the two directions, and the speed is , the direction is

[0024] Preferably, the speed of the trolley of bridge crane II is Vt, and the speed of the trolley is Vs. The trolley of bridge crane II and the trolley of bridge crane II both move at a uniform speed of 1.5 to 2.5 m / s in the directions of Vt and Vs. At the same time, the trolley of bridge crane I does not move, and the trolley of bridge crane I moves in the direction of -Vs at the speed of the trolley of bridge crane II.

[0025] Preferably, when the main truss end I and the main truss end II are hoisted onto the sliding guide rail, a tire frame support is provided at the cantilever section, and support rods on both sides prevent tilting.

[0026] Preferably, the sliding guide rail comprises a sliding support frame, the lower end of the sliding support frame is provided with concrete, a sliding beam is provided between the sliding support frame and the concrete, a channel steel slideway is provided at the upper end of the sliding beam, a plurality of steel sliders are provided between the sliding beam and the sliding support frame for sliding along the channel steel slideway, and a pusher is provided on the sliding beam for driving the sliding support frame to slide. When the main truss platforms on both sides of the pool are assembled, the pusher is used to push the sliding support frame to slide the main trusses on both sides into place.

[0027] As a preference, the sliding guide rail on which the pusher is installed is first debugged; after debugging, it is loaded step by step according to the designed thrust force until the sliding guide rail starts to slide, and the pusher is used to synchronously push the sliding support frame to slide the sliding guide rail to the designed position.

[0028] Preferably, before construction, steel wire ropes are laid on the pool through corbels, and two layers of fine-mesh nets and dust-proof cloth are set up for safety protection of the pool.

[0029] Preferably, after the main truss slides into place, four sets of 20t hydraulic jacks are installed at the intersection nodes of the main truss web and the lower chord, and the main truss is synchronously lifted by the hydraulic jacks to leave the sliding track, lateral supports are installed, the sliding track is removed, the truss is unloaded, and falls on the support to complete the lifting, rotation, cumulative assembly and sliding construction process of the main truss.

[0030] The present invention can achieve the following effects:

[0031] The present invention provides a double-bridge crane lifting, rotating, accumulating, and sliding construction method, which has the advantages of simple structure, convenient operation, and good running stability compared with the prior art. It solves the problem of unsupported in-situ closure and docking of the main truss under limited conditions. A double-bridge crane is used to install a large-span truss, ensuring safety and reliability while realizing a time-saving and labor-saving construction method. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the present invention.

[0033] Figure 2 It is a structural schematic diagram of the rotational lifting of the middle section of the truss of the present invention.

[0034] Figure 3 It is a structural schematic diagram of the translational lifting of the middle section of the truss of the present invention.

[0035] Figure 4 It is a structural schematic diagram of the assembly of the single-side main truss of the present invention.

[0036] Figure 5 It is a structural schematic diagram of the assembly of the double-sided main trusses of the present invention.

[0037] Figure 6It is a structural schematic diagram of the installation position of the present invention.

[0038] Figure 7 It is a structural schematic diagram of the sliding guide rail of the present invention.

[0039] Figure 8 It is a schematic diagram of the rotational motion trajectory of the bridge crane II of the present invention.

[0040] In the figure: main truss end I1, sliding guide rail 2, assembly site 3, pool 4, main truss 5, bridge crane I6, middle section truss 7, main truss end II8, bridge crane II9, steel slider 10, sliding support frame 11, thruster 12, sliding beam 13, channel steel slide 14, concrete 15. DETAILED DESCRIPTION

[0041] The technical solution of the invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0042] Example: Figure 1-8 As shown, a double bridge crane lifting, rotating, accumulating, assembling and sliding construction method is shown, the double bridge crane lifting structure includes a pool 4, an assembly site 3 is arranged outside the pool 4, a pair of main trusses 5 are arranged above the left and right sides of the assembly site 3, a bridge crane I6 and a bridge crane II9 are arranged between the two main trusses 5, and sliding guide rails 2 are arranged at both ends of the main trusses 5. The main truss 5 includes a middle section truss 7, and the two ends of the middle section truss 7 are respectively provided with a main truss end I1 and a main truss end II8.

[0043] The sliding guide rail 2 includes a sliding support frame 11, a concrete 15 is provided at the lower end of the sliding support frame 11, a sliding beam 13 is provided between the sliding support frame 11 and the concrete 15, a channel steel slideway 14 is provided at the upper end of the sliding beam 13, four steel sliders 10 are provided between the sliding beam 13 and the sliding support frame 11 for sliding along the channel steel slideway 14, and a pusher 12 for driving the sliding support frame 11 to slide is provided on the sliding beam 13. After the main trusses 5 on both sides of the pool 4 are assembled, the pusher 12 is used to push the sliding support frame 11 to slide the main trusses 5 on both sides into place.

[0044] The construction method includes the following steps:

[0045] Step 1: Before construction, steel wire ropes are set up on the pool 4 through the corbels, and two layers of dense mesh and dustproof cloth are set up for safety protection of the pool 4. Sliding guide rails 2 are set up on the assembly site 3, and the main truss ends I1 and II8 are assembled at the same time. Then, the main truss ends I1 and II8 are hoisted onto the sliding guide rails 2, and the cantilevered section is supported by a tire frame, and the struts on both sides prevent tilting.

[0046] The sliding guide rail 2 with the pusher 12 installed is debugged first; after debugging, it is loaded step by step according to the designed thrust force until the sliding guide rail 2 starts to slide, and the pusher 12 is used to synchronously push the sliding support frame 11 to slide the sliding guide rail 2 to the designed position.

[0047] Step 2: Assemble the middle section truss 7 at a horizontal angle of 18 degrees at the end of the assembly site 3, and use the bridge crane I6 and the bridge crane II9 to complete the overall assembly of the middle section truss 7, such as Figure 1 shown.

[0048] The lifting points of bridge crane I6 and bridge crane II9 are symmetrically arranged at the intersection nodes of the upper chords of the middle section truss 7, and the middle section truss 7 is assembled in sections in an upright manner.

[0049] When the bridge crane I6 and bridge crane II9 hoist the middle section truss 7, the posture rotation design is carried out, and the single and double-technical hoisting aerial rotation posture adjustment paths are decomposed, such as Figure 8 shown.

[0050] The trolley on the bridge crane II9 moves along the bridge crane track Vt direction, and the trolley on the bridge crane II9 moves along the bridge crane direction Vs direction. The two directions move at a uniform speed at the same time. According to the principle of theoretical mechanics, the hanging point moves along the tangent direction of the circle in the two directions, and the speed is , the direction is The speed of the trolley of bridge crane II9 is ​​Vt, and the speed of the trolley is Vs. The trolley of bridge crane II9 and the trolley of bridge crane II9 are moving at a constant speed of 1.5 to 2.5 m / s in the directions of Vt and Vs. At the same time, the trolley of bridge crane I6 does not move, and the trolley of bridge crane I6 moves in the direction of -Vs at the speed of the trolley of bridge crane II9.

[0051] Step 3: The bridge crane I6 and the bridge crane II9 move vertically synchronously to the upper part of the lifting points at both ends of the middle section truss 7 for installation of the slings; the bridge crane I6 and the bridge crane II9 are used to lift and rotate to complete the closing process of the middle section truss 7 and the main truss end I1 and the main truss end II8, thus completing the overall assembly of the main trusses 5 on both sides.

[0052] The bridge crane I6 and the bridge crane II9 are moved synchronously until the bridge crane II9 passes over the rear end of the main truss end II8, and then the bridge crane I6 moves around the bridge crane II9 in a single point along the circular route until the bridge crane I6 and the bridge crane II9 are in the same straight line. Figure 2 Then, the bridge crane I6 and the bridge crane II9 are synchronously moved up and down until the middle section truss 7 is parallel to the docking position of the main truss end I1 and the main truss end II8 at both ends, as shown. Figure 3 The bridge crane I6 and the bridge crane II9 move horizontally synchronously and land to complete the lifting, rotation and closing of the middle section truss 7 and the main truss end I1 and the main truss end II8, as shown. Figure 4 shown.

[0053] Step 4: Use the sliding guide rails 2 to slide the main trusses 5 on both sides to the assembly position, such as Figure 6 shown.

[0054] Step 5: After the main truss 5 is in place, it is lifted and unloaded after the sliding track is removed, so that the main truss can be assembled in place. After the main truss 5 slides into place, 4 sets of 20t hydraulic jacks are set at the intersection of the web and the lower chord of the main truss 5. The main truss is lifted synchronously by the hydraulic jacks, leaving the sliding track, setting lateral supports, removing the sliding track, unloading the truss, and falling on the support to complete the lifting, rotation, cumulative assembly and sliding construction process of the main truss 5.

[0055] In summary, the double-bridge crane lifting, rotating, accumulating, and sliding construction method has the advantages of simple structure, convenient operation, and good running stability. It solves the problem of unsupported in-situ closure and docking of the main truss under limited conditions. A double-bridge crane is used to install the large-span truss, ensuring safety and reliability while realizing a time-saving and labor-saving construction method.

[0056] The above description is only a specific embodiment of the present invention, but the structural features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are included in the patent scope of the present invention.

Claims

1. A double-bridge crane lifting, rotating, accumulating, and sliding construction method, characterized in that: The double-bridge crane lifting structure comprises a water pool (4), an assembly site (3) is arranged outside the water pool (4), a pair of main trusses (5) are arranged above the left and right sides of the assembly site (3), a bridge crane I (6) and a bridge crane II (9) are arranged between the two main trusses (5), and sliding guide rails (2) are arranged at both ends of the main trusses (5); the main trusses (5) comprise a middle section truss (7), and the two ends of the middle section truss (7) are respectively provided with a main truss end I (1) and a main truss end II (8); The construction method includes the following steps: Step 1: Setting a sliding guide rail (2) on the assembly site (3), assembling the main truss end I (1) and the main truss end II (8) at the same time, and then hoisting the main truss end I (1) and the main truss end II (8) onto the sliding guide rail (2); Step 2: assemble the middle section truss (7) at a horizontal angle of 18 degrees at the end of the assembly site (3), and use bridge crane I (6) and bridge crane II (9) to complete the overall assembly of the middle section truss (7); Step 3: The bridge crane I (6) and the bridge crane II (9) are synchronously moved vertically to the upper part of the lifting points at both ends of the middle section truss (7) for installation of the slings; the bridge crane I (6) and the bridge crane II (9) are lifted and rotated to complete the closing process of the middle section truss (7) and the main truss end I (1) and the main truss end II (8), thereby completing the overall assembly of the main trusses (5) on both sides; Step 4: Use the sliding guide rail (2) to slide the main trusses (5) on both sides to the assembly position; Step 5: After the main truss (5) is in place, it is lifted up and the sliding track is removed and then unloaded, so that the main truss is assembled in place.

2. The double-bridge crane lifting, rotating, accumulating, and sliding construction method according to claim 1 is characterized in that: The bridge crane I (6) and the bridge crane II (9) are synchronously moved until the bridge crane II (9) passes the rear end of the main truss end II (8), and then the bridge crane I (6) is moved around the bridge crane II (9) and moves in a single point along a circular route until the positions of the bridge crane I (6) and the bridge crane II (9) are in the same straight line; then the bridge crane I (6) and the bridge crane II (9) are synchronously moved up and down until the middle section truss (7) is parallel to the docking position of the main truss end I (1) and the main truss end II (8) at both ends; the bridge crane I (6) and the bridge crane II (9) are synchronously moved horizontally and placed in position to complete the lifting, rotation and closing of the middle section truss (7) and the main truss end I (1) and the main truss end II (8).

3. The double-bridge crane lifting, rotating, accumulating, and sliding construction method according to claim 2 is characterized in that: When the bridge crane I (6) and the bridge crane II (9) are hoisting the middle section truss (7), the posture rotation design is carried out to decompose the single and double-technique hoisting aerial rotation posture adjustment paths.

4. The double-bridge crane lifting, rotating, accumulating, and sliding construction method according to claim 3 is characterized in that: The trolley on the bridge crane II (9) moves along the bridge crane track Vt, and the trolley on the bridge crane II (9) moves along the bridge crane direction Vs. The two directions move at a uniform speed at the same time. According to the principle of theoretical mechanics, the hanging point moves tangentially along the circumference of the two directions, and the speed is Direction 5. The double-bridge crane lifting, rotating, accumulating, assembling and sliding construction method according to claim 4 is characterized in that: The speed of the trolley of bridge crane II (9) is Vt, and the speed of the trolley is Vs. The trolley of bridge crane II (9) and the trolley of bridge crane II (9) are moving at a constant speed of 1.5 to 2.5 m / s in the directions of Vt and Vs. At the same time, the trolley of bridge crane I (6) does not move, and the trolley of bridge crane I (6) moves in the direction of -Vs at the speed of the trolley of bridge crane II (9).

6. The double-bridge crane lifting, rotating, accumulating, assembling and sliding construction method according to claim 1 is characterized in that: The sliding guide rail (2) includes a sliding support frame (11), the lower end of the sliding support frame (11) is provided with concrete (15), a sliding beam (13) is provided between the sliding support frame (11) and the concrete (15), the upper end of the sliding beam (13) is provided with a channel steel slideway (14), a plurality of steel sliders (10) are provided between the sliding beam (13) and the sliding support frame (11) for sliding along the channel steel slideway (14), and a pusher (12) is provided on the sliding beam (13) for driving the sliding support frame (11) to slide; when the main trusses (5) on both sides of the pool (4) are assembled and hoisted, the pusher (12) is used to push the sliding support frame (11) to slide the main trusses (5) on both sides into place.

7. The double-bridge crane lifting, rotating, accumulating, assembling and sliding construction method according to claim 1 is characterized in that: After the main truss (5) is slid into place, four sets of 20t hydraulic jacks are arranged at the intersection nodes of the web members and the lower chord members of the main truss (5), the main truss is lifted synchronously, the sliding track is removed, the truss is unloaded, and the main truss (5) is placed on the support to complete the lifting, rotating, assembling and sliding construction process of the main truss (5).

Images