Bridge steel box girder floating crane hoisting self-adaptive anchoring mechanism and topological optimization method thereof

Abstract

The invention relates to the technical field of bridge building construction, in particular to a bridge steel box girder floating crane hoisting self-adaptive anchoring mechanism and a topological optimization method thereof, and mainly aims at ensuring the stability of a bridge in the hoisting process through the matched use of an anchoring assembly and an auxiliary structure in the bridge hoisting construction. The requirement of stable construction is met, and the strain is controlled under various conditions; the construction flexibility is better; the overall rigidity and stability of the anchoring structure are improved; by optimizing material distribution and structural design, the non-deformability of the anchoring structure when the anchoring structure bears the dynamic load of the steel box girder and the impact of water flow is improved; material consumption is reduced, the material utilization rate of the anchoring structure is optimized by removing unnecessary material parts, and the construction cost is reduced; and on-site installation and debugging are facilitated through optimization design, and the construction difficulty and time cost are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction, and in particular to a bridge steel box girder floating hoisting adaptive anchoring mechanism and a topology optimization method thereof. Background Art

[0002] The existing patent document with the announcement number CN111926715A discloses a method for installing a steel box girder bridge, which includes a first sub-section of a prefabricated steel box girder bridge located between the first pier and the second pier of the side span of the bridge; and a second sub-section located between the two second piers of the middle span of the bridge; constructing a sliding bracket pile foundation between the first pier and the second pier of each side span, and building a sliding bracket on the pile foundation; through the sliding bracket, the first sub-section that is hoisted by the floating crane in blocks to the sliding bracket is installed in place to obtain a side span steel box girder bridge segment; by assembling a bridge deck crane on the side span steel box girder bridge segment, the middle span steel box girder bridge segment assembled by the second sub-section is hoisted to the installation position; at the installation position, the middle span segment is connected with the side span steel box girder segment to obtain a steel box girder bridge.

[0003] The floating crane installation of steel box girders is a key link in the construction of large bridges, and its technical difficulty and safety risks are relatively high. Traditional anchoring mechanisms often have difficulty adapting to the dynamic changes of steel box girders caused by environmental factors such as water flow and wind during the floating crane process, resulting in poor anchoring effects and even safety accidents. In addition, traditional design methods lack intelligence and automation, cannot respond to complex situations in the lifting process in real time, are not flexible enough, cannot meet actual construction needs, and increase construction difficulty and cost; therefore, the development of a floating crane installation adaptive anchoring mechanism that can adapt to the dynamic response of steel box girders and has an efficient topological structure and its optimization method is of great significance to improving the safety and economy of bridge construction.

[0004] To this end, the present invention proposes an adaptive anchoring mechanism for floating crane installation of a bridge steel box girder and a topology optimization method thereof to solve the above-mentioned problems. Summary of the invention

[0005] The object of the present invention is to provide an adaptive anchoring mechanism for floating crane installation of a bridge steel box girder and a topology optimization method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an adaptive anchoring mechanism for floating crane installation of a bridge steel box girder, comprising an anchoring assembly and an auxiliary structure, wherein the anchoring assembly is arranged on the bridge, and the anchoring assembly is connected to a lifting cable, and the lifting cable is arranged on a floating crane platform body, and the anchoring assembly is connected to the auxiliary structure.

[0007] Preferably, the anchor assembly includes a hanging rod, a lifting ring, a frame plate, a load-bearing top plate, a connecting bottom plate, a regulating hydraulic cylinder, a pushing column, an anchor hole, an auxiliary spring, an auxiliary plate, a through hole, an anchor screw, a limit stop plate, a damping sleeve and an internal threaded locking ring; the hanging rod is fixedly arranged on the load-bearing top plate, and the top end of the hanging rod is equidistantly fixed with a lifting ring, the lifting ring is connected to the lifting cable, the load-bearing top plate is fixedly arranged on the top end of the frame plate, the bottom end of the frame plate is fixedly arranged with a connecting bottom plate, and the load-bearing top plate is equidistantly arranged with a lifting ring. A regulating hydraulic cylinder is provided, one end of which is connected to the pushing column, anchor holes are equidistantly arranged on the connecting base plate, an auxiliary spring is fixedly arranged at a hole position on one side of the anchor hole, the other end of the auxiliary spring is fixedly arranged on the auxiliary plate, and the auxiliary plate is symmetrically provided with through holes, a limited stop plate is fixedly arranged at one end of the anchor screw, and a damping sleeve is sleeved on the anchor screw, the internal thread locking ring is threadedly connected to the anchor screw, and an auxiliary structure is arranged on the anchor screw.

[0008] Preferably, the connection bottom plate and the bearing top plate are arranged at corresponding positions and have the same number of groups.

[0009] Preferably, two through holes are symmetrically arranged on the auxiliary plate, and the through holes and the anchor holes are arranged at corresponding positions and in the same number of groups, and their central axes are on the same straight line.

[0010] Preferably, the auxiliary plate, the regulating hydraulic cylinder and the pushing column are arranged in corresponding positions and in the same number of groups, and one end of the pushing column is in contact with the auxiliary plate.

[0011] Preferably, one end of the anchoring screw passes through the damping sleeve and then passes through the anchoring hole and the through hole.

[0012] Preferably, the auxiliary structure includes an internal threaded pressure ring, a fixed sleeve, a movable pressure column, a connecting spring, a threaded hole groove, a locking threaded column and a handle; the internal threaded pressure ring is threadedly connected to the anchor screw, and a fixed sleeve is symmetrically fixedly arranged on the bottom side of the internal threaded pressure ring, a movable pressure column is movably arranged in the fixed sleeve, one end of the movable pressure column is fixedly arranged with a connecting spring, and the other end of the connecting spring is fixedly arranged in the fixed sleeve, threaded hole grooves are symmetrically arranged in the internal threaded pressure ring, the threaded hole grooves are threadedly connected to the locking threaded column, and a handle is fixedly arranged on one end of the locking threaded column.

[0013] Preferably, the internal threaded pressure ring and the internal threaded locking ring are arranged in corresponding positions and have the same number of groups.

[0014] A topology optimization method for an adaptive anchoring mechanism for floating crane installation of a bridge steel box girder, the topology optimization method is:

[0015] S1: Establish initial model: Use computer-aided design software to establish the initial three-dimensional model of the adaptive anchoring mechanism for floating crane hoisting of bridge steel box girders. The model should include all key components and detailed features, and be preliminarily designed based on actual hoisting requirements and floating crane platform characteristics. At the same time, consider the influence of water flow conditions on the anchoring structure and establish a fluid-solid coupling analysis model.

[0016] S2: Define design variables and constraints: Define the design variables and constraints in the topology optimization process; the design variables should be able to fully reflect the geometric characteristics and material distribution of the anchoring structure; the constraints should ensure that the optimized structure meets all usage requirements and stability under water flow conditions;

[0017] S3: Topology optimization analysis: Use professional topology optimization software to perform multiple rounds of iterative calculations on the initial model. During the optimization process, the software will automatically remove the material parts that contribute less to the structural performance and strengthen the key stress areas; at the same time, considering the impact of fluid-solid coupling on structural performance, the anchor structure is subjected to fluid-solid coupling topology optimization analysis; by continuously adjusting the design variables and constraints, the optimal material distribution solution is found;

[0018] S4: Result verification and optimization: The topology optimized model is verified by finite element analysis and fluid-solid coupling simulation to ensure that it meets all design requirements and constraints. If it does not meet the requirements, the design variables and constraints are adjusted and the optimization analysis is repeated. At the same time, the optimization results are further verified and optimized in combination with experimental data and engineering experience. By comparing the structural performance and economic indicators under different optimization schemes, the best scheme is selected as the final design scheme.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention mainly ensures the stability of the bridge during the hoisting construction by setting up compatible anchoring components and cooperating with auxiliary structures to meet the needs of stable construction and control strains in various situations; the construction flexibility is better; the overall stiffness and stability of the anchoring structure are improved: by optimizing material distribution and structural design, the deformation resistance of the anchoring structure when subjected to dynamic loads of steel box girders and water flow impact is improved; material consumption is reduced: by removing unnecessary material parts, the material utilization rate of the anchoring structure is optimized and the construction cost is reduced; and construction convenience is ensured: the optimized design should be convenient for on-site installation and debugging, and reduce construction difficulty and time cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the connection between the floating crane, the bridge and the anchoring mechanism structure of the present invention;

[0022] Figure 2 For the present invention Figure 1A partial enlarged schematic diagram of the structure connection;

[0023] Figure 3 A top view of the structural connection of the anchor assembly of the present invention;

[0024] Figure 4 For the present invention Figure 3 A partial enlarged schematic diagram of the structure connection;

[0025] Figure 5 A bottom view of the anchor assembly structure connection of the present invention;

[0026] Figure 6 A top view of the connection between the anchor assembly and the auxiliary structure of the present invention;

[0027] Figure 7 A bottom view showing the connection between the anchor assembly and the auxiliary structure of the present invention;

[0028] Figure 8 This is a schematic diagram of the connection of the auxiliary structure of the present invention;

[0029] Fig. 9 This is a topology optimization construction system diagram of the present invention.

[0030] In the figure: the floating platform body 1, the suspension cable 2, the bridge 3, the anchoring assembly 4, the hanging rod 401, the lifting ring 402, the frame plate 403, the load-bearing top plate 404, the connecting bottom plate 405, the regulating hydraulic cylinder 406, the pushing column 407, the anchoring hole 408, the auxiliary spring 409, the auxiliary plate 410, the through hole 411, the anchoring screw 412, the limit stop plate 413, the damping sleeve 414, the internal thread locking ring 415, the internal thread pressure ring 501, the fixed sleeve 502, the movable pressure column 503, the connecting spring 504, the threaded hole groove 505, the locking threaded column 506, and the handle 507. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention are described clearly and completely below. The embodiments of the present invention and all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0032] Example 1: Please refer to Figure 1-Figure 9 An adaptive anchoring mechanism for floating crane installation of a bridge steel box girder includes an anchoring assembly 4 and an auxiliary structure. The anchoring assembly 4 is arranged on a bridge 3, and the anchoring assembly 4 is connected to a lifting cable 2. The lifting cable 2 is arranged on a floating crane platform body 1, and the anchoring assembly 4 is connected to the auxiliary structure.

[0033] The present invention also provides a topology optimization method for a bridge steel box girder floating crane hoisting adaptive anchoring mechanism, the topology optimization method is:

[0034] S1: Establish initial model: Use computer-aided design software (such as SolidWorks, ANSYS, etc.) to establish the initial three-dimensional model of the adaptive anchoring mechanism of the bridge steel box girder floating crane. The model should include all key components and detailed features, and be preliminarily designed based on actual lifting requirements and floating crane platform characteristics. At the same time, consider the influence of water flow conditions on the anchoring structure and establish a fluid-solid coupling analysis model.

[0035] S2: Define design variables and constraints: Define the design variables (such as the size, shape, position, material properties, etc. of the anchor unit) and constraints (such as mechanical performance requirements such as strength, stiffness, stability, and practical constraints such as construction convenience and cost control) in the topology optimization process. The design variables should be able to fully reflect the geometric characteristics and material distribution of the anchor structure; the constraints should ensure that the optimized structure meets all usage requirements and stability under water flow conditions.

[0036] S3: Topology optimization analysis: Use professional topology optimization software (such as Altair OptiStruct, ANSYS Topology Optimization, etc.) to perform multiple rounds of iterative calculations on the initial model. During the optimization process, the software will automatically remove the material parts that contribute less to the structural performance and strengthen the key stress areas. At the same time, considering the impact of fluid-solid coupling on structural performance, the anchor structure is subjected to fluid-solid coupling topology optimization analysis. By continuously adjusting the design variables and constraints, the optimal material distribution solution is found.

[0037] S4: Result verification and optimization: The topology optimized model is verified by finite element analysis and fluid-solid coupling simulation to ensure that it meets all design requirements and constraints. If it does not meet the requirements, return to adjust the design variables and constraints and re-optimize the analysis. At the same time, the optimization results are further verified and optimized in combination with experimental data and engineering experience. By comparing the structural performance and economic indicators under different optimization schemes, the optimal scheme is selected as the final design scheme.

[0038] The present invention mainly ensures the stability of the bridge during the hoisting construction by setting up compatible anchoring components and cooperating with auxiliary structures to meet the needs of stable construction and control strains in various situations.

[0039] Example 2: Based on Example 1, please refer to Figure 2-Figure 7The anchor assembly 4 includes a hanging rod 401, a lifting ring 402, a frame plate 403, a bearing top plate 404, a connecting bottom plate 405, a regulating hydraulic cylinder 406, a pushing column 407, an anchor hole 408, an auxiliary spring 409, an auxiliary plate 410, a through hole 411, an anchor screw 412, a limit stopper 413, a damping sleeve 414 and an internal thread locking ring 415; the hanging rod 401 is fixedly arranged on the bearing top plate 404, and the top of the hanging rod 401 is equidistantly fixed with a lifting ring 402, the lifting ring 402 is connected to the lifting cable 2, the bearing top plate 404 is fixedly arranged on the top of the frame plate 403, the bottom end of the frame plate 403 is fixedly arranged with a connecting bottom plate 405, the bearing top plate 404 is equidistantly arranged with a regulating hydraulic cylinder 406, one end of the regulating hydraulic cylinder 406 is connected to the pushing column 407, the connecting bottom plate 405 is equidistantly arranged with anchor holes 408, one side of the anchor hole 408 is fixedly arranged with an auxiliary spring 409, the other end of the auxiliary spring 409 The auxiliary plate 410 is fixedly provided with a through hole 411 symmetrically arranged on the auxiliary plate 410, a limited stopper 413 is fixedly arranged on one end of the anchor screw 412, and a damping sleeve 414 is sleeved on the anchor screw 412, an internal thread locking ring 415 is threadedly connected with the anchor screw 412, and an auxiliary structure is arranged on the anchor screw 412; the connection bottom plate 405 here corresponds to the position of the bearing top plate 404, and the number of sets is the same; the auxiliary plate 410 here is symmetrically arranged on the Two through holes 411 are provided, and the through holes 411 and the anchor holes 408 are provided at corresponding positions and in the same number of groups, and their central axes are on the same straight line; the auxiliary plate 410 here corresponds to the regulating hydraulic cylinder 406 and the pushing column 407 in corresponding positions and in the same number of groups, and one end of the pushing column 407 is in contact with the auxiliary plate 410; one end of the anchor screw 412 here passes through the damping sleeve 414, and then passes through the anchor hole 408 and the through hole 411.

[0040] In this embodiment, after the anchoring screw 412 is used to anchor the bridge 3 and the connecting base plate 405, the lifting is carried out through the lifting cable 2. If there is shaking or instability during this process, the adjusting hydraulic cylinder 406 can be used to drive the pushing column 407 to push the auxiliary plate 410. Here, the adjusting hydraulic cylinder 406 is arranged in multiple groups at equal intervals on the load-bearing top plate 404, that is, the pushing column 407 is driven by the adjusting hydraulic cylinder 406 at the corresponding position, and the auxiliary plate 410 at the corresponding position is driven to improve the connection stability of the anchoring screw 412.

[0041] Example 3: Based on Example 2, please refer to Figure 8The auxiliary structure here includes an internal threaded pressure ring 501, a fixed sleeve 502, a movable pressure column 503, a connecting spring 504, a threaded hole groove 505, a locking threaded column 506 and a handle 507; the internal threaded pressure ring 501 is threadedly connected to the anchor screw 412, and the fixed sleeve 502 is symmetrically fixed on the bottom side of the internal threaded pressure ring 501, and a movable pressure column 503 is movably arranged in the fixed sleeve 502, one end of the movable pressure column 503 is fixedly arranged with a connecting spring 504, and the other end of the connecting spring 504 is fixedly arranged in the fixed sleeve 502, and the threaded hole groove 505 is symmetrically arranged in the internal threaded pressure ring 501, the threaded hole groove 505 is threadedly connected to the locking threaded column 506, and a handle 507 is fixedly arranged at one end of the locking threaded column 506; the internal threaded pressure ring 501 here corresponds to the internal threaded locking ring 415 in the same position and has the same number of groups.

[0042] An internal threaded pressure ring 501 is provided here, and a fixed sleeve 502 and a movable pressure column 503 are provided on the internal threaded pressure ring 501, the purpose of which is to have an extrusion and locking effect on the internal threaded locking ring 415, further improving the locking stability of the internal threaded locking ring 415, thereby improving the anchoring firmness of the anchoring assembly.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An adaptive anchoring mechanism for floating hoisting of bridge steel box girders, characterized in that: The invention comprises an anchoring assembly (4) and an auxiliary structure, wherein the anchoring assembly (4) is arranged on a bridge (3), and the anchoring assembly (4) is connected to a suspension cable (2), and the suspension cable (2) is arranged on a floating platform body (1), and the anchoring assembly (4) is connected to the auxiliary structure.

2. The adaptive anchoring mechanism for floating hoisting of bridge steel box beams according to claim 1 is characterized by: The anchor assembly (4) comprises a hanging rod (401), a lifting ring (402), a frame plate (403), a bearing top plate (404), a connecting bottom plate (405), a regulating hydraulic cylinder (406), a pushing column (407), an anchor hole (408), an auxiliary spring (409), an auxiliary plate (410), a through hole (411), an anchor screw (412), a limit stop plate (413), a damping sleeve (414) and an internal thread locking ring (415); the hanging rod (401) is fixedly arranged on the bearing top plate (404), and the top end of the hanging rod (401) is fixedly provided with a lifting ring (402) at an equal distance, and the lifting ring (402) is connected to the suspension cable (2); the bearing top plate (404) is fixedly arranged on the top end of the frame plate (403), and the bottom end of the frame plate (403) is fixedly provided with a connecting bottom plate (405). 5), regulating hydraulic cylinders (406) are equidistantly arranged on the bearing top plate (404), one end of the regulating hydraulic cylinder (406) is connected to the pushing column (407), anchor holes (408) are equidistantly arranged on the connecting bottom plate (405), an auxiliary spring (409) is fixedly arranged at a hole position on one side of the anchor hole (408), the other end of the auxiliary spring (409) is fixedly arranged on the auxiliary plate (410), and the auxiliary plate (410) is symmetrically provided with through holes (411), one end of the anchor screw (412) is fixedly provided with a limit stopper (413), and the anchor screw (412) is sleeved with a damping sleeve (414), the internal thread locking ring (415) is threadedly connected to the anchor screw (412), and an auxiliary structure is arranged on the anchor screw (412).

3. The adaptive anchoring mechanism for floating hoisting of bridge steel box beams according to claim 2 is characterized by: The connection bottom plate (405) and the bearing top plate (404) are arranged at corresponding positions and have the same number of groups.

4. The adaptive anchoring mechanism for floating hoisting of a bridge steel box girder according to claim 2 is characterized by: The auxiliary plate (410) is symmetrically provided with two through holes (411), and the through holes (411) and the anchor holes (408) are provided at corresponding positions and in the same number of groups, and the central axes of the two are on the same straight line.

5. The adaptive anchoring mechanism for floating hoisting of bridge steel box beams according to claim 2 is characterized by: The auxiliary plate (410), the regulating hydraulic cylinder (406) and the pushing column (407) are arranged at corresponding positions and in the same number of groups, and one end of the pushing column (407) is in contact with the auxiliary plate (410).

6. The adaptive anchoring mechanism for floating hoisting of bridge steel box beams according to claim 2 is characterized by: One end of the anchoring screw (412) passes through the damping sleeve (414), and then passes through the anchoring hole (408) and the through hole (411).

7. The self-adaptive anchoring mechanism for floating hoisting of bridge steel box beams according to claim 1 is characterized by: The auxiliary structure comprises an internal threaded pressure ring (501), a fixed sleeve (502), a movable pressure column (503), a connecting spring (504), a threaded hole groove (505), a locking threaded column (506) and a handle (507); the internal threaded pressure ring (501) is threadedly connected to the anchor screw (412), and the bottom side of the internal threaded pressure ring (501) is symmetrically fixed with a fixed sleeve (502), and the movable arrangement in the fixed sleeve (502) is A movable pressure column (503) is arranged, one end of which is fixedly provided with a connecting spring (504), the other end of which is fixedly provided in a fixed sleeve (502), the internal threaded pressure ring (501) is symmetrically provided with threaded holes (505), the threaded holes (505) are threadedly connected with a locking thread column (506), and one end of which is fixedly provided with a handle (507).

8. The adaptive anchoring mechanism for floating hoisting of bridge steel box beams according to claim 7 is characterized by: The internal thread pressing ring (501) and the internal thread locking ring (415) are arranged at corresponding positions and have the same number of groups.

9. A topology optimization method for a bridge steel box girder floating crane hoisting adaptive anchoring mechanism according to any one of claims 1 to 8, characterized in that: The topology optimization method is: S1: Establish initial model: Use computer-aided design software to establish the initial three-dimensional model of the adaptive anchoring mechanism for floating crane hoisting of bridge steel box girders. The model should include all key components and detailed features, and be preliminarily designed based on actual hoisting requirements and floating crane platform characteristics. At the same time, consider the influence of water flow conditions on the anchoring structure and establish a fluid-solid coupling analysis model. S2: Define design variables and constraints: Define the design variables and constraints in the topology optimization process; The design variables should be able to fully reflect the geometric characteristics and material distribution of the anchoring structure; the constraints should ensure that the optimized structure meets all usage requirements and stability under water flow conditions; S3: Topology optimization analysis: Use professional topology optimization software to perform multiple rounds of iterative calculations on the initial model. During the optimization process, the software will automatically remove the material parts that contribute less to the structural performance and strengthen the key stress areas; at the same time, considering the impact of fluid-solid coupling on structural performance, the anchor structure is subjected to fluid-solid coupling topology optimization analysis; by continuously adjusting the design variables and constraints, the optimal material distribution solution is found; S4: Result verification and optimization: The topology optimized model is verified by finite element analysis and fluid-solid coupling simulation to ensure that it meets all design requirements and constraints. If it does not meet the requirements, the design variables and constraints are adjusted and the optimization analysis is repeated. At the same time, the optimization results are further verified and optimized in combination with experimental data and engineering experience. By comparing the structural performance and economic indicators under different optimization schemes, the best scheme is selected as the final design scheme.

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