Method for load test of crane with multi-float barge and float barge for load test

Abstract

The application belongs to the technical field of load test, and discloses a crane load test method using multiple floating barges and a floating barge for load test. The method uses multiple floating barges of the same specification to perform load test, so that the target weight of the load test can be quickly adjusted by increasing or decreasing the number of floating barges according to the target weight, without the need for multiple disassembly and assembly operations of the crane and the floating barges, thereby saving a large amount of time. The method obtains the actual weight of the ballast water that can be contained in each water storage tank by means of one-time water injection and two-time water injection, checks the overall scheme, avoids the problem that the deviation exists between the theoretical weight and the actual weight of the ballast water due to processing errors, and increases or decreases the number of counterweights according to the actual weight of the ballast water, so as to ensure the accuracy of the test.

Description

Technical Field

[0001] This invention relates to the field of load testing technology, and in particular to a method for load testing of a crane using multiple floating barges and a floating barge for load testing. Background Technology

[0002] Load testing of marine cranes is a crucial step in verifying their reliability in actual operating scenarios. It must cover both floating and bottom-sitting operating modes, and conduct tests on various typical working conditions, including single main hook, double main hook, single auxiliary hook, and double auxiliary hook. During the test, load weights ranging from 160 tons to 1760 tons must be flexibly switched according to the load requirements of different working conditions to comprehensively verify whether the crane's lifting, luffing, and slewing functions meet the standards under light, medium, and heavy loads, ensuring that it can adapt to the complex operating environments, such as those at sea, in subsequent operations.

[0003] In load-bearing tests, simulated load-bearing tests are typically conducted using floating barges. This involves calculating the empty weight of the barge, the weight of the ballast water inside, the weight of the spreader, and the weight of the counterweights, ensuring the sum of these weights equals the target weight for the load-bearing test. However, the weight of the ballast water inside the barge is calculated based on its internal volume. Errors in the manufacturing process of the barge can lead to discrepancies between the actual weight of the ballast water and the calculated weight, thus compromising the reliability of the load-bearing test results. Furthermore, the wide range of target weights in the load-bearing tests necessitates significant time spent replacing the barge when transitioning from one target weight to another, severely impacting the overall test schedule.

[0004] Therefore, there is an urgent need for a crane load testing method using multiple floating barges and a floating barge for load testing to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a crane load testing method using multiple floating barges and a floating barge for the load testing. The test results are highly reliable, there is no need to replace the floating barges, saving time and speeding up the test process.

[0006] To achieve this objective, the present invention adopts the following technical solution: On the one hand, a method for testing the load of a crane using multiple floating barges is provided. This method involves using multiple floating barges of the same specifications to conduct a load test on the crane. Each floating barge contains three water tanks of equal volume, and includes the following steps: S1. Based on the target weight of the load test and the unloaded weight G of each of the aforementioned barges. 空 The theoretical weight G of ballast water that each of the aforementioned water storage tanks can hold. 理And the total weight of the spreading gear, determine the number of the floating barges, the number of the water storage tanks that need to be injected with the ballast water, and the planned number of counterweights; S2. Fill the water tanks of each of the floating barges with water, leaving the middle water tank of one of the floating barges unfilled, and calculate the total weight of each of the floating barges in the current state according to the draft scale. S3. Connect the crane and the floating barge (which is not filled with water) in the intermediate water storage tank through the lifting device, and slowly raise the lifting device to make it taut and keep it in a stress-free state; S4. Refill the retained water tanks with water a second time. Calculate the total weight of the barge in its current state based on the draft scale, and combine this with the total weight measured after the first water filling to calculate the actual weight G of ballast water that a single water tank can hold. 实 And the theoretical weight G of the ballast water 理 To conduct a review, use the formula N=(G) 实 -G 理 ) / G 铁 The planned number of counterweights is corrected, where N is the number of counterweights, and G... 铁 The weight of a single counterweight; S5. Connect the remaining floating barges in sequence, and arrange the counterweights to conduct a load test.

[0007] Optionally, in step S1, the unloaded weight G of each of the floating barges is determined. 空 It also includes the following steps: A. The crane is connected to the floating barge via two hooks. A first-order tensioner is installed between one hook and the floating barge, and a second-order tensioner is installed between the other hook and the floating barge. The weight is calculated according to the formula G1=(F1+F2) / 2, where G1 is the first weight of the floating barge, F1 is the reading of the first-order tensioner, and F2 is the reading of the second-order tensioner. B. Hoist the floating barge to the harbor basin and disconnect the crane from the floating barge. After the floating barge comes to rest on the water surface, record the draft at three points on the bow and three on the stern of the floating barge, respectively, and denot them as T1, T2, T3, T4, T5, and T6. Calculate the draft using the formula T = (T1 + T2 + T3 + T4 + T5 + T6) / 6, where T is the average of the six draft readings. Calculate the draft using the formula G2 = P × g × T, where G2 is the second weight of the floating barge, P is the area of ​​the current waterline of the floating barge, and g is the density of the fresh water in the harbor basin. C. The unloaded weight G of the floating barge 空 According to formula G 空 = (G1 + G2) / 2 is used for calculation.

[0008] Optionally, in step S1, the theoretical weight G of the ballast water that each of the water storage tanks can hold is determined. 理 It also includes the following steps; Ⅰ. Determine the length L, width W, and height H of the water storage tank, and calculate them according to the formula V=L×W×H, where V is the volume of a single water storage tank. II. The theoretical weight G of ballast water that a single water storage tank can hold. 理 According to formula G 理 The calculation is performed using V×ρ, where ρ is the density of the ballast water.

[0009] Optionally, in step S2, when filling the floating barge with water in the middle of the water storage tank, it is necessary to ensure that the water storage tanks at both ends of the floating barge are synchronized during the filling process, and the difference in draft between the bow and stern of the floating barge is less than 50 mm.

[0010] Optionally, step S5 further includes the following steps: S51. The crane slowly raises the lifting device until it is fully straightened, then keeps it stationary and checks the condition of the lifting device to see if any strands are broken. S52. After checking that everything is correct, slowly lift the floating barge that has completed the second water injection and hoist it off the water surface. Keep it still and check whether there are any abnormal noises from the floating barge and the hoisting equipment. S53. After checking that everything is correct, raise the floating barge to 2 meters above the water surface and check again whether the floating barge and the lifting equipment are in good working order. S54. Move the next floating barge to be hoisted to below the hoisted floating barge, and place anti-collision steel blocks above the floating barge to be hoisted to complete the connection between the two floating barges; S55. Repeat step S54 to complete the connection of the floating barge required for the test; S56. Arrange the counterweights; S57. Conduct a load test on the crane.

[0011] Optionally, during steps S2 and S4, when filling with water, it is necessary to ensure that the water storage tank is either fully loaded or empty.

[0012] On the other hand, a floating barge for load testing is provided, which is used in the load testing method for a crane using multiple floating barges as described in any of the above claims. The floating barge for load testing includes a barge body and a lifting plate assembly. The barge body is a hollow box structure with three water storage tanks inside. The barge body has two lifting plate assemblies spaced apart along a second direction on each side along a first direction. The lifting plate assemblies are connected to the top of the barge body.

[0013] Optionally, the hoisting plate assembly includes a hoisting main plate with multiple hoisting holes. The hoisting main plate is inclinedly connected to the main body of the floating barge. The hoisting main plate is inclined along the first direction towards the central axis of the main body of the floating barge, and the included angle between the hoisting main plate and the main body of the floating barge is 75°.

[0014] Optionally, the hoisting plate assembly includes a hoisting main plate with multiple hoisting holes. The hoisting main plate is inclinedly connected to the main body of the floating barge. The hoisting main plate is inclined along the first direction towards the central axis of the main body of the floating barge, and the included angle between the hoisting main plate and the main body of the floating barge is 75°.

[0015] Optionally, the hoisting plate assembly further includes multiple support plates, and each hoisting hole has a support plate on both sides along the second direction, connecting the floating barge body and the hoisting main plate.

[0016] The beneficial effects of this invention are: This invention provides a crane load-bearing test method using multiple floating barges. This method employs multiple floating barges of identical specifications for load-bearing tests, allowing for rapid adjustment of different target weights by increasing or decreasing the number of floating barges. This eliminates the need for repeated disassembly and assembly of the crane and floating barges, saving significant time. Furthermore, this method obtains the actual weight of ballast water that a single water tank can hold through primary and secondary water injection, correcting the planned number of counterweights and obtaining the accurate required quantity. This avoids deviations between the theoretical and actual weight of ballast water due to manufacturing errors, thus ensuring the accuracy of the test.

[0017] The present invention also provides a floating barge for load testing. By using this floating barge in the load testing method of a crane using multiple floating barges, the various floating barges can be connected to each other through lifting plate groups, thereby facilitating the assembly and disassembly of the various floating barges when switching different target weights in the load test, making the operation of the load testing method of a crane using multiple floating barges more convenient. Attached Figure Description

[0018] Figure 1This is a flowchart of the steps of the crane load test method using multiple floating barges provided by the present invention; Figure 2 This is a state diagram of the crane load test method using multiple floating barges provided by the present invention during a load test; Figure 3 This is a schematic diagram of the connection between the lifting device and the floating barge in the crane load test method using multiple floating barges provided by the present invention; Figure 4 This is a connection diagram of the No. 2 tension device in the crane load test method for multi-hulled barges provided by the present invention; Figure 5 This is a top view of the floating barge for load testing provided by the present invention; Figure 6 This is a front view of the hoisting plate assembly in the floating barge for load testing provided by the present invention; Figure 7 This is a side view of the hoisting plate assembly in the floating barge for load testing provided by the present invention.

[0019] In the picture: 100. Crane; 200. Lifting gear; 201. Lifting block; 202. Wire rope; 203. Long lifting ring; 204. Shackle; 205. Seamless rope loop; 300. No. 1 tensioner; 400. No. 2 tensioner; 1. Main body of the floating barge; 11. Water storage tank; 2. Lifting plate assembly; 21. Lifting main plate; 22. Reinforcing plate; 23. Support plate. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0021] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0024] Therefore, in order to ensure the reliability of the results obtained from the load test of the crane, save the load test time, and speed up the test progress, this embodiment provides a crane load test method using multiple floating barges. The crane is tested by using multiple floating barges of the same specifications, and each floating barge is equipped with three water storage tanks of equal volume.

[0025] like Figures 1 to 4 As shown, the crane load test method for multi-hull barges includes the following steps: S1. Based on the target weight of the load test and the unloaded weight G of each barge. 空 The theoretical weight G of ballast water that each water storage tank 11 can hold. 理 And the total weight of the spreader 200, determine the number of floating barges, the number of water storage tanks 11 that need to be injected with ballast water, and the number of counterweights; S2. Fill the water tanks 11 of each floating barge with water, leaving the middle water tank 11 of one floating barge unfilled, and calculate the total weight of each floating barge in the current state according to the draft scale. S3. Connect the crane 100 and the unfilled floating barge in the intermediate water storage tank 11 through the spreader 200, and slowly raise the spreader 200 so that the spreader 200 is taut and kept in a stress-free state. S4. Refill the retained water storage tank 11 with water a second time. Calculate the total weight of the barge in its current state based on the draft scale, and combine this with the total weight measured after the first water filling to calculate the actual weight G of ballast water that a single water storage tank 11 can hold. 实 And the theoretical weight G of ballast water 理To conduct a review, use the formula N=(G) 实 -G 理 ) / G 铁 The number of counterweights is corrected, where N is the number of counterweights and G is the number of counterweights. 铁 The weight of a single counterweight; S5. Connect the remaining floating barges in sequence, and arrange the counterweights to conduct a load test.

[0026] This method uses multiple floating barges of the same specifications to conduct load tests, allowing for rapid adjustment of different target weights by increasing or decreasing the number of floating barges. This eliminates the need for repeated disassembly and assembly of the crane 100 and the floating barges, saving significant time. Furthermore, this method obtains the actual weight of ballast water that a single water tank 11 can hold through primary and secondary water injection, correcting the planned number of counterweights and obtaining the accurate quantity required. This avoids the problem of deviation between the theoretical and actual weight of ballast water due to processing errors, thus ensuring the accuracy of the test.

[0027] In this embodiment, the lifting device 200 mainly includes various specifications and models of lifting rods 201, wire ropes 202, long lifting rings 203, shackles 204, and seamless rope loops 205, etc. The appropriate model and quantity of lifting rods 201, wire ropes 202, long lifting rings 203, shackles 204, and seamless rope loops 205 can be freely selected according to the target weight of the load test.

[0028] Optionally, in step S1, the unloaded weight G of each floating barge is determined. 空 It also includes the following steps: A. The crane 100 is connected to the floating barge through two hooks. A first tensioner 300 is installed between one hook and the floating barge, and a second tensioner 400 is installed between the other hook and the floating barge. The weight is calculated according to the formula G1=(F1+F2) / 2, where G1 is the first weight of the floating barge, F1 is the reading of the first tensioner 300, and F2 is the reading of the second tensioner 400. B. Hoist the floating barge to the harbor basin and disconnect the crane 100 from the floating barge. After the floating barge comes to rest on the water surface, record the draft at three points on the bow and three on the stern of the floating barge, and denot them as T1, T2, T3, T4, T5, and T6 respectively. Calculate the draft using the formula T = (T1 + T2 + T3 + T4 + T5 + T6) / 6, where T is the average of the six draft readings. Calculate the draft using the formula G2 = P × g × T, where G2 is the second weight of the floating barge, P is the area of ​​the current waterline of the floating barge, and g is the density of the fresh water in the harbor basin. C. Unloaded weight of the barge (G) 空 According to formula G 空= (G1 + G2) / 2 is used for calculation.

[0029] First, the first weight G1 of the unloaded barge is obtained by averaging the readings of the two tension gauges. Then, the second weight G2 of the unloaded barge is calculated using the draft scale. Finally, the average of the first weight G1 and the second weight G2 is calculated to obtain the final unloaded weight G of the barge. 空 More accurate, ensuring the reliability of test results.

[0030] Optionally, in step S1, the theoretical weight G of ballast water that each water storage tank 11 can hold is determined. 理 It also includes the following steps; I. Determine the length L, width W, and height H of the water storage tank 11 by calculating the volume using the formula V = L × W × H, where V is the volume of a single water storage tank 11. II. The theoretical weight G of ballast water that a single water storage tank 11 can hold. 理 According to formula G 理 The calculation is performed using V×ρ, where ρ is the density of the ballast water.

[0031] The theoretical weight G of ballast water that storage tank 11 can hold is first calculated. 理 This makes it convenient to utilize the theoretical weight G of the ballast water. 理 To determine the hoisting plan.

[0032] Optionally, in step S2, when filling the water tank 11 in the middle of the floating barge without filling it with water, it is necessary to ensure that the water tanks 11 at both ends of the floating barge are synchronized during the filling process, and the difference in draft between the bow and stern of the floating barge is less than 50mm.

[0033] By ensuring that the difference in draft between the two ends of the floating barge is less than 50mm during water filling, the floating barge is kept in a balanced state as much as possible, thus reducing interference caused by errors when calculating using the draft scale.

[0034] Optionally, step S5 further includes the following steps: S51. Crane 100 slowly raises spreader 200 until spreader 200 is fully straightened, then keeps it still and checks the condition of spreader 200 to see if any strands are broken. S52. After checking that everything is correct, slowly lift the floating barge that has completed the second water filling and hoist it off the water surface. Keep it still and check whether there are any abnormal noises from the floating barge and the hoisting equipment 200. S53. After checking that everything is correct, raise the floating barge to 2 meters above the water surface and check again whether the floating barge and the lifting gear 200 are in good condition. S54. Move the next floating barge to be lifted to below the lifted floating barge, and place anti-collision steel blocks above the floating barge to be lifted to complete the connection between the two floating barges; S55. Repeat step S54 to complete the connection of the floating barge required for the test; S56. Arrange the counterweights; S57. Conduct a load test on crane 100.

[0035] By setting anti-collision steel blocks in step S54, damage caused by collisions during the connection of the various floating barges can be avoided.

[0036] Optionally, during steps S2 and S4, when filling with water, it is necessary to ensure that the water storage tank 11 is either fully loaded or empty. By keeping the water storage tank 11 either fully loaded or empty, it is convenient to calculate the weight.

[0037] In this embodiment, as Figures 5 to 7 As shown, a floating barge for load testing is also provided. The floating barge for load testing is used in the above-mentioned crane load testing method using multiple floating barges. The floating barge for load testing includes a floating barge body 1 and a lifting plate group 2. The floating barge body 1 is a hollow box structure with three water storage tanks 11 inside. The floating barge body 1 has two lifting plate groups 2 arranged at intervals along the second direction on both sides along the first direction. The lifting plate group 2 is connected to the top of the floating barge body 1.

[0038] By using a multi-barrel crane load test method with this load test barge, the individual barges can be connected to each other through the lifting plate group 2. This makes it easier to assemble and disassemble the individual barges when switching between different target weights during the load test, making the operation of the multi-barrel crane load test method more convenient.

[0039] Optionally, such as Figure 6 , Figure 7 As shown, the hoisting plate assembly 2 includes a hoisting main plate 21 with multiple hoisting holes. The hoisting main plate 21 is inclinedly connected to the floating barge body 1. The hoisting main plate 21 is inclined in the first direction toward the central axis of the floating barge body 1, and the included angle between the hoisting main plate 21 and the floating barge body 1 is 75°.

[0040] By tilting the lifting main plate 21 towards the central axis of the floating barge body 1 along the first direction and making the angle between the lifting main plate 21 and the floating barge body 1 75°, the lifting main plate 21 can better withstand tension, thereby improving the strength during lifting and ensuring the safety during lifting.

[0041] Optionally, such as Figure 6 , Figure 7As shown, the lifting plate assembly 2 also includes multiple reinforcing plates 22, which are symmetrically distributed on both sides of the lifting main plate 21 along the first direction and correspond one-to-one with the positions of the lifting holes. By providing reinforcing plates 22 corresponding to the lifting holes on both sides of the lifting main plate 21, the positions of the lifting holes on the lifting main plate 21 are reinforced by the reinforcing plates 22, thereby improving the strength during lifting and ensuring the safety during lifting. In this embodiment, the reinforcing plate 22 is a circular plate with a through hole at the center that communicates with the lifting hole.

[0042] Optionally, such as Figure 6 , Figure 7 As shown, the lifting plate assembly 2 also includes multiple support plates 23. Each lifting hole has a support plate 23 on both sides along the second direction, connecting the floating barge body 1 and the lifting main plate 21. By providing support plates 23 on both sides of each lifting hole along the second direction, the number of connection points between the floating barge body 1 and the lifting main plate 21 is increased, thereby improving the connection strength between the lifting main plate 21 and the floating barge body 1, preventing the lifting main plate 21 from falling off, and ensuring safety during lifting. Because the lifting main plate 21 is inclined, the support plate 23 is a triangular plate.

[0043] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. 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 claims of the present invention.

Claims

1. A method for testing the load-bearing capacity of a crane using multiple floating barges, characterized in that, A load test was conducted on the crane (100) using multiple floating barges of the same specifications. Each of the floating barges contained three water tanks (11) of equal volume, and the test included the following steps: S1. Based on the target weight of the load test and the unloaded weight G of each of the aforementioned barges. 空 The theoretical weight G of ballast water that each of the aforementioned water storage tanks (11) can hold. 理 The total weight of the spreader (200) is used to determine the number of the floating barges, the number of the water tanks (11) that need to be filled with the ballast water, and the planned number of counterweights. S2. Select one of the floating barges that are determined to participate in the load test for calibration. Leave the water tank (11) in the middle of the floating barge for calibration empty and do not fill it with water. Then fill the water tanks (11) on the left and right sides of the floating barge used for calibration and all the water tanks (11) of the remaining floating barges with water. Calculate the total weight of each floating barge in the current state according to the draft scale. S3. Connect the crane (100) and each of the floating barges participating in the load test through the spreader (200), and slowly raise the spreader (200) to make the spreader (200) taut and keep it in a stress-free state; S4. A second filling of water is performed on the water tank (11) in the middle of the floating barge used for calibration. The total weight of the floating barge in the current state is calculated according to the draft scale. Combined with the total weight measured after the first filling, the actual weight G of the ballast water that a single water tank (11) can hold is calculated. 实 And the theoretical weight G of the ballast water 理 To conduct a review, use the formula N=(G) 实 -G 理 ) / G 铁 The planned number of counterweights is corrected, where N is the number of counterweights, and G... 铁 The weight of a single counterweight; S5. Based on the result of correcting the number of counterweights, arrange the counterweights and conduct a load test.

2. The crane load-bearing test method using multiple floating barges according to claim 1, characterized in that, In step S1, the unloaded weight G of each of the floating barges is determined. 空 It also includes the following steps: A. The crane (100) is connected to the floating barge through two hooks. A first tensioner (300) is installed between one of the hooks and the floating barge, and a second tensioner (400) is installed between the other hook and the floating barge. The weight is calculated according to the formula G1=(F1+F2) / 2, where G1 is the first weight of the floating barge, F1 is the reading of the first tensioner (300), and F2 is the reading of the second tensioner (400). B. Hoist the floating barge to the harbor basin and disconnect the crane (100) from the floating barge. After the floating barge comes to rest on the water surface, record the draft at three points on the bow and three points on the stern of the floating barge, and denot them as T1, T2, T3, T4, T5, and T6 respectively. Calculate the draft using the formula T = (T1 + T2 + T3 + T4 + T5 + T6) / 6, where T is the average of the six drafts. Calculate the draft using the formula G2 = P × g × T, where G2 is the second weight of the floating barge, P is the area of ​​the current waterline of the floating barge, and g is the density of the fresh water in the harbor basin. C. The unloaded weight G of the floating barge 空 According to formula G 空 = (G1 + G2) / 2 for calculation.

3. The crane load-bearing test method using multiple floating barges according to claim 1, characterized in that, In step S1, the theoretical weight G of the ballast water that each of the water storage tanks (11) can hold is determined. 理 It also includes the following steps; Ⅰ. Determine the length L, width W and height H of the water storage tank (11) and calculate them according to the formula V=L×W×H, where V is the volume of a single water storage tank (11); II. The theoretical weight G of the ballast water that a single water storage tank (11) can hold. 理 According to formula G 理 The calculation is performed using V×ρ, where ρ is the density of the ballast water.

4. The crane load-bearing test method using multiple floating barges according to claim 1, characterized in that, In step S2, when water is injected into the floating barge that has the water storage tank (11) in the middle not filled, it is necessary to ensure that the water storage tanks (11) at both ends of the floating barge are synchronized during the water injection, and the difference in draft between the bow and stern of the floating barge is less than 50mm.

5. The crane load-bearing test method using multiple floating barges according to claim 1, characterized in that, Step S5 also includes the following steps: S51. The crane (100) slowly raises the lifting device (200) until the lifting device (200) is completely straightened, and then keeps it stationary to check the condition of the lifting device (200) and observe whether there is any broken strand. S52. After checking that everything is correct, slowly lift the floating barge that has completed the second water injection and hoist it off the water surface. Keep it still and check whether there are any abnormal noises from the floating barge and the hoisting device (200). S53. After checking that everything is correct, raise the floating barge to 2 meters above the water surface and check again whether the floating barge and the lifting device (200) are in good working order. S54. Move the next floating barge to be hoisted to below the hoisted floating barge, and place anti-collision steel blocks above the floating barge to be hoisted to complete the connection between the two floating barges; S55. Repeat step S54 to complete the connection of the floating barge required for the test; S56. Arrange the counterweights; S57. Perform a load test on the crane (100).

6. The crane load-bearing test method using multiple floating barges according to claim 1, characterized in that, In steps S2 and S4, when injecting water, it is necessary to ensure that the water storage tank (11) is either fully loaded or empty.

7. The crane load-bearing test method using multiple floating barges according to claim 1, characterized in that, The floating barge includes a floating barge body (1) and a hoisting plate assembly (2). The floating barge body (1) is a hollow box structure with three water storage tanks (11) inside. The floating barge body (1) has two hoisting plate assemblies (2) arranged at intervals along the second direction on both sides along the first direction. The hoisting plate assemblies (2) are connected to the top of the floating barge body (1).

8. The crane load-bearing test method using multiple floating barges according to claim 7, characterized in that, The hoisting plate assembly (2) includes a hoisting main plate (21) with multiple hoisting holes. The hoisting main plate (21) is inclinedly connected to the floating barge body (1). The hoisting main plate (21) is inclined along the first direction towards the central axis of the floating barge body (1). The included angle between the hoisting main plate (21) and the floating barge body (1) is 75°.

9. The crane load-bearing test method using multiple floating barges according to claim 8, characterized in that, The hoisting plate assembly (2) also includes multiple reinforcing plates (22), which are symmetrically distributed on both sides of the hoisting main plate (21) along the first direction and correspond one-to-one with the position of the hoisting hole.

10. The crane load-bearing test method using multiple floating barges according to claim 8, characterized in that, The hoisting plate assembly (2) also includes multiple support plates (23), and each hoisting hole is provided with a support plate (23) on both sides along the second direction, which connects the floating barge body (1) and the hoisting main plate (21).

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