Vertical transportation and storage method for large curve cross beam segments

Abstract

The invention discloses a vertical transportation and storage method for large curved cross beam sections, and relates to the technical field of bridge steel structure construction, and the vertical transportation and storage method specifically comprises the following steps: S1, horizontal curved cross beam sections are transported to a storage area; s2, calculating the gravity center of the curve cross beam section, and marking the arrangement positions of a turnover lifting lug and a slope base on the curve cross beam section; s3, a turnover lifting lug and a slope base are manufactured, and installation of the turnover lifting lug, the slope base and an auxiliary lifting lug is completed; s4, the turnover lifting lugs and the auxiliary lifting lugs are lifted at the same time, and 90-degree turnover of the curved cross beam sections is completed; s5, the curved cross beam sections are hoisted and vertically placed on a deck of the transport ship; s6, anti-skid treatment is conducted on the curve cross beam sections, and then steel wire rope scissors are used for oppositely pulling and fixing; and S7, after the transport ship arrives at the designated position, the steel wire rope is loosened, and vertical storage of the curved cross beam sections is completed. The technical problem that in the prior art, follow-up transportation and installation are not convenient when large curve cross beam sections are stored is solved.

Description

Technical Field

[0001] This invention relates to the field of bridge steel structure construction technology, and in particular to a method for vertical transportation and storage of large curved crossbeam segments. Background Technology

[0002] In China, most large crossbeam segments are rectangular planar structures. However, with the continuous development and progress of steel structure bridges, bridge designs are becoming increasingly unique, in addition to maintaining their original functions. More and more bridges are featuring novel designs and curved surfaces, which places increasingly higher demands on the fabrication, storage, transportation, and installation of bridges.

[0003] Previously, most large curved crossbeam segments were manufactured in the factory in a horizontal or flat position. After manufacturing, they were transported by ship to the bridge site in their factory condition, and then turned over upon arrival. The following difficulties may arise at the construction site: ① Due to limitations in site size and equipment lifting capacity, turning over may not be possible. ② Turning over during on-site construction can easily cause collisions and injuries. ③ It increases the time spent working at heights on the construction site, posing significant safety risks. ④ The construction schedule is tight. Summary of the Invention

[0004] The purpose of this invention is to provide a vertical transportation and storage method for large curved beam segments, which solves the technical problem that the storage of curved beam segments in the prior art is inconvenient for subsequent transportation and installation.

[0005] This application discloses a method for vertical transportation and storage of large curved beam segments, including the following steps: S1: The curved beam segments are placed horizontally on the racks in the field and transported to the storage area by a transport vehicle; S2: Calculate the center of gravity of the curved beam segment and mark the arrangement positions of the turning lug and the inclined base on it; S3: Fabricate the turning lugs and inclined base, install the turning lugs and inclined base onto the curved beam segment, and then weld the auxiliary lugs; S4: Simultaneously lift the turning lug and the auxiliary lug, so that the curved beam segment is off the ground, lower the auxiliary lug side, so that the inclined base gradually contacts the ground, until the curved beam segment completes a 90° turn; S5: Lift the curved crossbeam segment and place it on the deck of the transport ship; S6: Place an anti-slip fixing plate on the deck, which cooperates with the bottom of the curved beam segment to restrict its slippage on the deck, and then fix it with steel wire rope shear pull; S7: After the transport ship arrives at the designated location, the wire rope is released, and the curved beam segment is hoisted to the storage area for vertical storage.

[0006] This application features a turning lug and an inclined base installed on the curved crossbeam segment, which facilitates subsequent turning and erection, and also ensures the stability of transportation.

[0007] Based on the above technical solution, the embodiments of this application can be further improved as follows: Furthermore, the specific content of step S2 is as follows: S201: Using Tekla modeling, the theoretical centroid of the curved beam segment is calculated to assist in the calculation. S202: Based on the center of gravity obtained in the modeling, mark the actual planar center of gravity position of the curved beam segment in CAD; S203: Use the CAD plan to lay out the dimensions of the turning lugs and the distance between the installation location line and the baseline; S204: Using the SolidWorks model of the curved beam segment, simulate the bridge installation state and obtain the dimensions and installation position of the inclined base that can keep the curved beam segment in an upright state. The advantage of this step is that specific data is obtained through the corresponding software calculation, which is convenient for subsequent manufacturing and processing, and also makes it easier to obtain the installation position of the turning lug and the inclined base.

[0008] Furthermore, the specific content of step S3 is as follows: S301: Fabricate the turning lug and the inclined base; S302: Weld the turning lug to one end of the curved beam segment's curved top plate, and bolt the inclined base to the other end of the curved beam segment's curved top plate; S303: Weld the auxiliary lifting lug to the middle block of the curved beam segment. The beneficial effect of this step is that the design of the welding position facilitates the stable turning of the curved beam segment.

[0009] Furthermore, the specific content of step S5 is as follows: S501: Arrange connectable support stools on the clamping plate, and design and combine supports according to the external structural dimensions of the curved beam. S502: Vertically lift the curved beam segment and place it on the connectable support stool. Adjust the height of the connectable support stool so that the inclined base contacts the deck. The beneficial effect of this step is to ensure that the curved beam segment can be stably placed on the deck by setting up the connectable support stool.

[0010] Furthermore, the anti-slip fixing plate in step S6 is matched with the bottom sharp corner of the curved beam segment. The beneficial effect of this step is to prevent the curved beam segment from slipping during transportation.

[0011] Furthermore, the diameter of the wire rope in step S6 is 16mm. The beneficial effect of using this step is that by using a wire rope of a specific size, stability can be further guaranteed.

[0012] Furthermore, the number of the turning lugs is at least two, and the heights of the turning lugs are not the same. The beneficial effect of this step is that the turning lugs of different heights can be used to lift the curved surface with lugs of different lengths, ensuring stability during the turning process.

[0013] Furthermore, the horizontal distance between the lifting center of gravity of all the aforementioned turning lugs and the center of gravity of the curved beam segment is the same. The beneficial effect of this step is that the stability during turning can be further guaranteed through the design of the installation position.

[0014] Furthermore, there are at least two sets of inclined bases, and the heights of the inclined bases are not the same. The beneficial effect of this step is that by using inclined bases of different heights, the stability of the curved surface can be further guaranteed.

[0015] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages: 1. This application changes the existing transportation and storage method of large curved crossbeam segments, changing the horizontal to the vertical, which facilitates transportation and subsequent hoisting. Because the vertical hoisting occupies less space, it is more convenient to install on steel structure bridges and also easier for employees to operate.

[0016] 2. This application uses turning lugs of different heights and inclined bases to facilitate the stable turning and support of large curved beam segments, thereby achieving stable transportation and storage.

[0017] 3. The inclined base in this application is bolted, eliminating the need for welding and ensuring the appearance quality of the crossbeam segments.

[0018] 4. This application allows the curved beam segments to be turned over and repaired in the factory, eliminating the need for secondary on-site adjustments and ensuring the linear quality and interface accuracy of the curved beam segments.

[0019] 5. When transporting this application, it should be stored upright with the curved surface facing down. The anti-slip fixing plate can prevent it from tipping over and sliding during transportation.

[0020] 6. This application is easy to operate, all tooling can be reused, and transportation costs are low. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure during the transportation of a large curved beam segment vertical transportation and storage method according to a specific embodiment of the present invention, specifically step S1. Figure 2 for Figure 1 A schematic diagram of the crossbeam segment of the middle curve from another angle; Figure 3 for Figure 1 A schematic diagram of another angle structure of the mid-curve crossbeam segment; Figure 4 This is a schematic diagram of the turning over of a curved beam segment in a vertical transportation and storage method for large curved beam segments according to a specific embodiment of the present invention. Figure 5 This is a schematic diagram of the curved beam segment on the transport ship in step S6 of a vertical transport and storage method for large curved beam segments according to a specific embodiment of the present invention. The attached figures are labeled as follows: 1-Turning lifting lug; 2-Auxiliary lifting lug; 3-Curved crossbeam segment; 4-Center of gravity; 5-Sloping base; 6-Connectable support stool; 7-Wire rope. Detailed Implementation

[0023] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention. It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by those skilled in the art to which this invention pertains.

[0024] In the description of this application, it should be understood that the terms "upper" and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0025] In this application, unless otherwise expressly specified and limited, the terms "installation," "setup," etc., 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 according to the specific circumstances.

[0026] To better understand the above technical solutions, the following will provide a detailed description of the technical solutions in conjunction with the accompanying drawings and specific embodiments.

[0027] Example 1: like Figure 1-5 As shown in the illustration, this application discloses a method for vertical transportation and storage of large curved beam segments. This method allows for vertical storage of curved beam segments, enabling direct hoisting without the need for repeated flipping, thus significantly improving efficiency. Furthermore, this application utilizes horizontal processing during fabrication and then adapts to vertical transportation during subsequent handling, further enhancing work efficiency.

[0028] The specific method described in this application includes the following steps: S1: The curved beam segment is placed horizontally on the rack in the field and transported to the storage area by a transport vehicle. Specifically, when the curved beam segment is placed, the non-curved web of the curved beam segment is facing down. Then it is transported by multiple transport vehicles, preferably two, to ensure stability. S2: Calculate the center of gravity of the curved beam segment and mark the positions of the turning lugs and inclined base on it. Specifically, the details of this step are as follows: S201: Using Tekla modeling, the theoretical centroid of the curved beam segment is calculated to assist in the calculation. S202: Based on the center of gravity obtained in the modeling, mark the actual planar center of gravity position of the curved beam segment in CAD; S203: Use the CAD plan to lay out the dimensions of the turning lugs and the distance between the installation location line and the baseline; S204: Using the SolidWorks model of the curved beam segment, the bridge installation state is simulated and the dimensions and installation position of the inclined base that can keep the curved beam segment in an upright state are obtained. S3: Fabricate the turning lugs and inclined base, and install the turning lugs and inclined base onto the curved crossbeam segment, then weld auxiliary lugs; specifically, the details of this step are as follows: S301: Fabricate the turning lug and the inclined base; S302: Weld the turning lug to one end of the curved beam segment's curved top plate, and bolt the inclined base to the other end of the curved beam segment's curved top plate; S303: The auxiliary lifting lug is welded to the middle block of the curved beam segment. During assembly, the auxiliary lifting lug is located at the end of the middle block of the curved beam segment near the inclined base. That is, the auxiliary lifting lug and the turning lifting lug are located on both sides of the center of gravity of the curved beam segment, so as to ensure the stability of the entire structure when turning over. S4: Simultaneously lift the turning lug and the auxiliary lug, so that the curved beam segment is off the ground, lower the auxiliary lug side, so that the inclined base gradually contacts the ground, until the curved beam segment completes a 90° turn; S5: Lift the curved crossbeam segment and place it on the deck of the transport ship; specifically, the details of this step are as follows: S501: Arrange connectable support stools on the clamping plate, and design and combine supports according to the external structural dimensions of the curved beam. S502: Vertically lift the curved beam segment and place it on the connectable support stool, adjust the height of the connectable support stool, and make the inclined base contact the deck; This application involves placing connectable support stools on the deck of a transport ship to lift the curved beam segment, so that the inclined base contacts the deck and the two sides of the middle block of the curved beam segment contact the connectable support stools to complete the support. During hoisting, an 800t crane at the dock is used to lift the vertical curved beam segment onto the deck. At this time, the curved beam segment is installed in a bridge position with the curved surface facing downwards. The height of the connectable support stools is adjusted to prevent the curved beam segment from tipping over during transportation. S6: Place an anti-slip fixing plate on the deck, which cooperates with the bottom of the curved beam segment to restrict its slippage on the deck, and then fix it with steel wire rope scissor pull. Specifically, the anti-slip fixing plate cooperates with the bottom sharp corner of the curved beam segment, and there are 4 steel wire ropes at the front and 4 at the back, and the diameter of the steel wire rope is 16mm. S7: After the transport ship arrives at the designated location, the wire rope is released, the connectable support stool is removed, and the curved beam segment is hoisted to the storage area for vertical storage.

[0029] In one embodiment, the height of the turning lugs in this application is not uniform, and the height of the turning lugs in this application is not uniform, that is, forming long and short lugs, which is convenient to match the arc surface of the curved crossbeam segment, thereby ensuring stable turning.

[0030] In step S3 of this application, when the turning lugs are welded and fixed, it is necessary to ensure that the horizontal distance between the lifting center of gravity of all the turning lugs and the center of gravity of the curved beam segment is the same, so as to ensure the stability during turning.

[0031] Specifically, the inclined base in this application is at least two sets, and the heights of the inclined bases are not consistent. During welding, the inclined base with the higher height is located at the end of the curved surface of the curved beam segment with the higher height, while the inclined base with the lower height is located at the end of the curved surface of the curved beam segment with the lower height. During fixing, high-strength bolts are used to fasten the inclined base to the curved top plate of the curved beam segment.

[0032] Further explanation is provided regarding this application: This application utilizes TEKLA software to calculate the center of gravity of the curved crossbeam segment, preventing loss of control during tilting. Simultaneously, other software is used to calculate the specific product dimensions and installation location. Then, tilting lugs and inclined bases of varying heights are installed to facilitate subsequent tilting and vertical placement. The tilting lugs are made of a material no less than Q355, with a lug plate thickness of no less than 36mm and a weld length of no less than 800mm. The inclined base is constructed from two HM588x300 steel sections, made of a material no less than Q345. The upper and lower flanges are welded together using 150x150 discontinuous bevel welds and ground smooth. The inclined base is calculated to ensure effective contact and force distribution with the curved surface of the crossbeam segment. The inclined base in this application is bolted, meaning holes are drilled in the inclined base with the hole spacing consistent with the crossbeam fixing points, facilitating bolting and disassembly of the base to the crossbeam segment. The inclined plate is drilled with a diameter of φ22mm and uses M20 bolts with double nuts.

[0033] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification. In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A method for vertical transportation and storage of large curved beam segments, characterized in that, Includes the following steps: S1: Transport the horizontal curved beam to the storage area; S2: Calculate the center of gravity of the curved beam segment and mark the arrangement positions of the turning lug and the inclined base on it; S3: Fabricate the turning lugs and inclined base, install the turning lugs and inclined base onto the curved beam segment, and then weld the auxiliary lugs; S4: Simultaneously lift the turning lug and auxiliary lug to complete the 90° turning of the curved crossbeam segment; S5: Lift the curved crossbeam segment and place it vertically on the deck of the transport ship; S6: Apply anti-slip treatment to the curved beam segment, and then fix it with steel wire rope shears; S7: After the transport ship arrives at the designated location, the wire rope is released, and the curved beam segment is hoisted to the storage area for vertical storage.

2. The method for vertical transportation and storage of large curved beam segments according to claim 1, characterized in that, The specific content of step S2 is as follows: S201: Using Tekla modeling, the theoretical centroid of the curved beam segment is calculated to assist in the calculation. S202: Based on the center of gravity obtained in the modeling, mark the actual planar center of gravity position of the curved beam segment in CAD; S203: Use the CAD plan to lay out the dimensions of the turning lugs and the distance between the installation location line and the baseline; S204: Using the SolidWorks model of the curved beam segment, simulate the bridge installation state and obtain the dimensions and installation position of the inclined base that can keep the curved beam segment in an upright state.

3. The method for vertical transportation and storage of large curved beam segments according to claim 2, characterized in that, The specific content of step S3 is as follows: S301: Fabricate the turning lug and the inclined base; S302: Weld the turning lug to one end of the curved beam segment's curved top plate, and bolt the inclined base to the other end of the curved beam segment's curved top plate; S303: Weld the auxiliary lifting lug to the middle block of the curved beam segment.

4. The method for vertical transportation and storage of large curved beam segments according to claim 3, characterized in that, The specific content of step S5 is as follows: S501: Arrange connectable support benches on the deck, and design and combine supports according to the external structural dimensions of the curved beam; S502: Vertically lift the curved beam segment and place it on the connectable support stool, adjust the height of the connectable support stool, and make the inclined base contact the deck.

5. The method for vertical transportation and storage of large curved beam segments according to claim 4, characterized in that, The specific content of step S6 is as follows: An anti-slip fixing plate is placed on the deck, which cooperates with the bottom sharp corner of the curved beam segment to restrict its slippage on the deck, and then is fixed by shearing with steel wire rope.

6. The method for vertical transportation and storage of large curved beam segments according to claim 1, characterized in that, The number of the turning lugs is at least two, and the heights of the turning lugs are not the same.

7. The method for vertical transportation and storage of large curved beam segments according to claim 6, characterized in that, The horizontal distance between the lifting center of gravity of the turning lug and the center of gravity of the curved beam segment is the same.

8. The method for vertical transportation and storage of large curved beam segments according to claim 1, characterized in that, The inclined base consists of at least two sets, and the heights of the inclined bases are not consistent.

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