Continuous beam falling method for installing reinforced concrete superposed beam

Abstract

The invention relates to the technical field of steel-concrete superposed beam installation, and provides a continuous beam falling method for installing a steel-concrete superposed beam, which comprises the following steps: S1, preparing and arranging a support: formulating the accurate position and layout of the support according to a design specification, and installing a temporary support; s2, preparing the steel-concrete composite beam: mounting a mold and a steel beam, performing concrete pouring, curing and curing, and then removing the mold; s3, hoisting the steel-concrete composite beam: hoisting the steel-concrete composite beam to a mounting position by using hoisting equipment; and S4, positioning and connecting the first beam: accurately positioning one end of the first beam on the support. By means of the technical scheme, the problems that when an existing steel-concrete composite beam is installed, different construction and calibration modes cannot be switched according to building and rebuilding in the construction and calibration process, different calibration modes cannot be selected during local rebuilding or building, and the construction cost is low are solved. And an existing structure cannot be used as a load test weight.

Description

Technical Field

[0001] The invention relates to the technical field of steel-concrete composite beam installation, and in particular to a continuous beam dropping method for installing a steel-concrete composite beam. Background Art

[0002] Composite beams are a commonly used component in structural engineering. They are usually composed of a stacked combination of two or more different materials to give full play to the performance of each material and achieve efficient structural performance. The materials of steel-concrete composite beams are metal and concrete. There are still some shortcomings in the installation of existing steel-concrete composite beams.

[0003] For example, the publication number CN114775424A discloses a method for prefabricated installation of assembled steel-concrete composite beam panels. In this method, prefabrication and installation are carried out in parallel, and a variety of measures are adopted to ensure key quality points such as the qualified rate of the panel steel reinforcement protective layer, the qualified rate of the size, the steel reinforcement positioning, and the quality of the shear nail connection between the panel and the steel beam. Through the technical control of the prefabrication and installation process of the concrete panel, the quality of the concrete panel is effectively guaranteed, while the construction cost is reduced, the construction period is shortened, and the application value is improved. Although the above construction method can achieve the quality guarantee of the concrete panel, when the existing steel-concrete composite beam is installed, it is not possible to switch between different construction and calibration methods according to the construction and reconstruction of the steel-concrete composite beam during the construction and calibration process, and it is not possible to select different calibration methods when rebuilding a local steel-concrete composite beam or building a steel-concrete composite beam. In addition, the inspection during construction is not comprehensive, and the existing structure cannot be used as a load test weight. Summary of the invention

[0004] The present invention proposes a continuous beam-dropping method for installing steel-concrete composite beams, which solves the problems that when installing existing steel-concrete composite beams, different construction and calibration methods cannot be switched according to reconstruction and reconstruction during the construction and calibration process, different calibration methods cannot be selected when partially reconstructing or building, and the detection during construction is incomplete.

[0005] The technical solution of the present invention is as follows:

[0006] A continuous beam-dropping method for installing a steel-concrete composite beam comprises the following steps:

[0007] S1: Support preparation and layout: determine the exact location and layout of supports according to design specifications and install temporary supports;

[0008] S2: Preparation of steel-concrete composite beams: installation of molds and steel beams, pouring of concrete, and removal of molds after curing and solidification;

[0009] S3: Hoisting of steel-concrete composite beams: Use hoisting equipment to hoist the steel-concrete composite beams to the installation location;

[0010] S4: Positioning and connecting the first beam: accurately position one end of the first beam on the support, ensure that the steel-concrete composite beam is horizontal, and then fix the steel-concrete composite beam on the support;

[0011] S5: Hoist the next beam: hoist the steel-concrete composite beam to the same position as the previous beam according to the connection method of the composite beam;

[0012] S6: Adjustment and calibration: Use the alignment gauge to fine-tune the position of the new beam to ensure it is perfectly horizontal and vertically aligned;

[0013] S7: Connection and fixing: connect the new beam to the previous beam, and then fix the two steel-concrete composite beams and the supports by workers;

[0014] S8: Structural preparation: Position the new beam and check whether the contact surface between the new beam and the support is uniform. Use a level to measure the height of the top surface of the new beam and check whether it is horizontal;

[0015] S9: Load test: After the lifting and connection are completed, the load test is carried out to verify the performance and safety of the structure, and to simulate the actual use conditions by applying loads of different types and sizes;

[0016] S10: Continuous beam removal: Repeat the steps from S5 to S9 to complete the cross section of the entire structure and then remove the temporary support;

[0017] S11: Alignment and Inspection: After all steel-concrete composite beams are installed, a final alignment and inspection is performed to ensure the vertical and horizontal alignment of the entire structure.

[0018] As a preferred solution of the present invention, the preparation of the steel-concrete composite beam in S2 includes manufacturing steel beams, manufacturing concrete beam molds, installing steel beams and concrete beam molds, pouring concrete, curing and solidifying, and demolding.

[0019] As a preferred solution of the present invention, the hoisting of steel-concrete composite beams in S3 includes selecting hoisting equipment, equipping hoisting accessories, checking hoisting equipment, marking hoisting points, determining hoisting sequence, hoisting beams, communication and coordination, monitoring and adjustment, safe placement, and acceptance and inspection.

[0020] As a preferred solution of the present invention, the fixing method in S4 and S7 is welding or bolt connection.

[0021] As a preferred solution of the present invention, the connection mode of the composite beams in S5 is any one of end-to-end connection, parallel arrangement, cross-intersection and stacking arrangement.

[0022] As a preferred solution of the present invention, the calibration method in S6 is divided into construction calibration and reconstruction calibration. The construction calibration performs position calibration according to drawings and design specifications, and the reconstruction calibration performs comparative coordination calibration based on existing steel-concrete composite beams.

[0023] As a preferred solution of the present invention, the review in S8 includes re-checking the size, position and horizontal verticality of the beam section and performing structural stability testing when different temperature and humidity changes affect the structural performance.

[0024] As a preferred solution of the present invention, the structural stability detection includes detecting the displacement and deformation, load capacity, vibration and resonance of the steel-concrete composite beam and non-destructive testing.

[0025] As a preferred solution of the present invention, the loads of different types and sizes in S9 include static loads, dynamic loads, fatigue loads, impact loads and test loads.

[0026] As a preferred solution of the present invention, the non-destructive test includes weld inspection, ultrasonic inspection and X-ray inspection.

[0027] The working principle and beneficial effects of the present invention are:

[0028] 1. By selecting different calibration methods according to the construction and reconstruction in the adjustment and calibration steps, the actual conditions of the existing structure can be better considered during the reconstruction to adapt to possible differences or problems with the drawings. This method can reduce unnecessary demolition and reconstruction, thereby saving costs and resources, and solves the defect that the existing steel-concrete composite beams cannot select different calibration methods when the beams are dropped or when they are partially rebuilt or constructed.

[0029] 2. By selecting end-to-end, parallel, cross and stacked arrangements according to the construction needs of the steel-concrete composite beam when hoisting the next beam, it is helpful to optimize structural performance, reduce costs and improve construction efficiency. When stacking, the composite beam can be used as a load test weight for the previous beam. By reusing the existing structure, no additional testing equipment is required, which solves the defect that the existing beam dropping method cannot use the existing structure as a load test weight.

[0030] 3. By using static loads, dynamic loads, fatigue loads, impact loads and test loads in load tests, the maximum bearing capacity of structures or materials under continuous loads can be determined, and the response of steel-concrete composite beam structures under vibration or impact loading can be studied. Impact loads can detect the performance of steel-concrete composite beams under short-term high-intensity loads, thereby simulating the impact of vehicle collision tests on steel-concrete composite beams, solving the problem of incompleteness in the existing beam-dropping method during detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] Figure 1 It is an overall flow chart of a continuous beam-dropping method for installing a steel-concrete composite beam of the present invention;

[0033] Figure 2 This is a flow chart of preparing a steel-concrete composite beam according to the present invention;

[0034] Figure 3 This is a flow chart of hoisting steel-concrete composite beams according to the present invention;

[0035] Figure 4 It is a schematic diagram of the load test of the present invention;

[0036] Figure 5 It is a schematic diagram of structural stability detection of the present invention. DETAILED DESCRIPTION

[0037] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Example 1

[0039] like Figure 1 As shown, this embodiment proposes a continuous beam-dropping method for installing a steel-concrete composite beam, comprising the following steps:

[0040] S1: Support preparation and layout: Determine the exact location and layout of the supports according to the design specifications and install temporary supports. Determine the location and layout of the beam supports according to the engineering design and specifications. The supports are set on a solid foundation and meet the specified size and strength requirements;

[0041] S2: Preparation of steel-concrete composite beams: installing molds and steel beams, pouring concrete, removing the molds after curing and solidification, and transporting the removed beam materials to the construction site;

[0042] S3: Hoisting of steel-concrete composite beams: Use hoisting equipment to hoist the steel-concrete composite beams to the installation location;

[0043] S4: Positioning and connecting the first beam: accurately position one end of the first beam on the support, ensure that the steel-concrete composite beam is horizontal, and then fix the steel-concrete composite beam on the support;

[0044] S5: Hoisting the next beam: hoist the steel-concrete composite beam to the same position as the previous beam according to the connection method of the composite beam. During the hoisting, the steel-concrete composite beams can be stacked so that the beam body can be used as the load test weight of the previous beam;

[0045] S6: Adjustment and calibration: Use a calibration instrument to fine-tune the position of the new beam to ensure that it is perfectly horizontal and vertically aligned. When calibrating the reconstruction construction, calibrate it according to the existing beam to ensure overall consistency;

[0046] S7: Connection and fixing: connect the new beam to the previous beam, and then fix the two steel-concrete composite beams and the supports by workers;

[0047] S8: Structural preparation: Position the new beam and check whether the contact surface between the new beam and the support is uniform. Use a level to measure the height of the top surface of the new beam and check whether it is horizontal;

[0048] S9: Load test: After the lifting and connection are completed, the load test is carried out to verify the performance and safety of the structure. The actual use conditions are simulated by applying loads of different types and sizes. During the load test, the performance under short-term high-intensity loads is simulated to simulate the impact of vehicle collision tests on steel-concrete composite beams;

[0049] S10: Continuous beam drop: repeat the steps from S5 to S9 to achieve continuous beam drop and testing. After completing the cross section of the entire structure, remove the temporary support;

[0050] S11: Alignment and Inspection: After all steel-concrete composite beams are installed, a final alignment and inspection is performed to ensure the vertical and horizontal alignment of the entire structure.

[0051] Example 2

[0052] like Figure 1-Figure 5 As shown, based on the same concept as the above-mentioned embodiment 1, this embodiment also proposes a continuous beam dropping method for installing steel-concrete composite beams.

[0053] In this embodiment, the preparation of the steel-concrete composite beam in S2 includes manufacturing a steel beam, manufacturing a concrete beam mold, installing a steel beam and a concrete beam mold, pouring concrete, curing and solidifying, and demolding, and the mold is removed after the concrete reaches sufficient strength. It is ensured that the surface of the concrete beam is not damaged, so as to realize the manufacture of the prefabricated steel-concrete composite beam.

[0054] In this embodiment, the lifting of steel-concrete composite beams in S3 includes selecting lifting equipment, equipping lifting accessories, checking lifting equipment, marking lifting points, determining the lifting sequence, lifting beams, communication and coordination, monitoring and adjustment, safe placement, and acceptance and inspection, to ensure the accurate positioning of the first steel-concrete composite beam, thereby ensuring that subsequent steel-concrete composite beams remain aligned with the first steel-concrete composite beam, thereby ensuring the performance, stability and construction efficiency of the entire structure.

[0055] In this embodiment, the fixing method in S4 and S7 is welding or bolt connection, and permanent welding or detachable bolt connection is used according to engineering requirements.

[0056] In this embodiment, the connection mode of the composite beams in S5 is any one of end-to-end connection, parallel arrangement, cross arrangement and stacking arrangement. When stacking arrangement, the second beam can be used as a load test weight for the upper beam.

[0057] In this embodiment, the calibration method in S6 is divided into construction calibration and reconstruction calibration. The construction calibration performs position calibration according to the drawings and design specifications, and the reconstruction calibration performs comparative coordination calibration based on the existing steel-concrete composite beams, so that the overall building remains consistent.

[0058] In this embodiment, the review in S8 includes re-checking the size, position and horizontal verticality of the beam section and performing structural stability testing under the conditions where different temperature and humidity changes affect the structural performance, and testing the impact of different temperature and humidity environments on the beam body after the beam is dropped, thereby testing the stability of the building structure.

[0059] In this embodiment, the structural stability test includes testing the displacement and deformation, load capacity, vibration and resonance of the steel-concrete composite beam and non-destructive testing. The load capacity test includes vertical load, horizontal load and wind load, so as to determine whether the structure is stable enough under various load conditions to prevent instability or collapse.

[0060] In this embodiment, the different types and sizes of loads in S9 include static loads, dynamic loads, fatigue loads, impact loads and test loads. Dynamic loads can simulate sudden or instantaneous loads. Fatigue loads are loads due to the continuous changes in the structure over a period of time, which helps to determine whether the structure will suffer fatigue damage such as cracks and fatigue fractures during long-term use. Impact loads can simulate car collisions and falling object impacts, thereby detecting the impact resistance of the building structure.

[0061] In this embodiment, non-destructive testing includes weld inspection, ultrasonic inspection and X-ray inspection, which can detect the quality of the building structure, discover hidden defects, and monitor the health status and integrity of the structure without destroying the physical integrity of the inspected object. Non-destructive testing helps to ensure the safety and reliability of steel-concrete composite beams.

[0062] Specifically, the present invention is a continuous beam-dropping method for installing a steel-concrete composite beam. First, Figure 1-Figure 5 As shown, the accurate position and layout of the support are formulated according to the design specifications. According to the engineering design and specifications, the support position and layout of the beam are determined, and temporary supports are installed. The support is set on a solid foundation and meets the specified size and strength requirements; the mold and steel beam are installed, and the concrete is poured. After curing and curing, the mold is removed, and the beam material after demolding is transported to the construction site to complete the preparation of the steel-concrete composite beam. The preparation process is to manufacture steel beams, manufacture concrete beam molds, install steel beams and molds, pour concrete, cure and cure, and remove the mold. After the concrete reaches sufficient strength, the mold is removed. Use lifting equipment to lift the steel-concrete composite beam to the installation location. The lifting steps are to select lifting equipment, equip lifting accessories, check lifting equipment, mark lifting points, determine lifting sequence, lift beams, communicate and coordinate, monitor and adjust, safely place, and accept and inspect. Accurately position one end of the first beam on the support, ensure that the steel-concrete composite beam is level, and then bolt or weld the steel-concrete composite beam to the support.

[0063] According to the connection method of the composite beam, the second steel-concrete composite beam is hoisted to the same position as the previous beam. The connection method of the composite beam is any one of the end-to-end connection, parallel arrangement, cross-cross and stacked arrangement. When hoisting, the steel-concrete composite beams can be stacked so that the beam body can be used as the load test weight of the previous beam. Use the calibrator to fine-tune the position of the new beam to ensure that it is completely horizontal and vertically aligned. When rebuilding the local steel-concrete composite beam and performing construction calibration, calibrate according to the existing beam body to ensure overall consistency. Connect the new beam to the previous beam, and then weld or bolt the two steel-concrete composite beams and the support by workers. Check whether the contact surface between the new beam and the support is uniform, and use the level to measure whether the height of the top surface of the new beam is horizontal and verify it. The verification steps are to re-check the size, position and horizontal verticality of the beam section and perform structural stability testing under the influence of different temperature and humidity changes on the structural performance to ensure the stability of the structure in different environments. After the hoisting and connection are completed, a load test is carried out to verify the performance and safety of the structure. The actual use conditions are simulated by applying loads of different types and sizes. The load test is divided into static load, dynamic load, fatigue load, impact load and test load. Dynamic load is used to simulate sudden or instantaneous loads. Fatigue load is used to determine whether the structure will be damaged by fatigue in long-term use, such as cracks and fatigue fractures. Impact load is used to simulate car collisions and falling objects, so as to detect the impact resistance of the building structure. Repeat the steps of hoisting the second beam to the load test to achieve continuous beam dropping and testing. After completing the cross section of the entire structure, remove the temporary support for final calibration and inspection to ensure the vertical and horizontal alignment of the entire structure.

[0064] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A continuous beam-dropping method for installing a steel-concrete composite beam, characterized in that: The following steps are involved: S1: Support preparation and layout: determine the exact location and layout of the supports according to the design specifications and install temporary supports; S2: Preparation of steel-concrete composite beams: installation of molds and steel beams, pouring of concrete, and removal of molds after curing and solidification; S3: Hoisting of steel-concrete composite beams: Use hoisting equipment to hoist the steel-concrete composite beams to the installation location; S4: Positioning and connecting the first beam: accurately position one end of the first beam on the support, ensure that the steel-concrete composite beam is horizontal, and then fix the steel-concrete composite beam on the support; S5: Hoist the next beam: hoist the steel-concrete composite beam to the same position as the previous beam according to the connection method of the composite beam; S6: Adjustment and calibration: Use the alignment gauge to fine-tune the position of the new beam to ensure it is perfectly horizontal and vertically aligned; S7: Connection and fixing: connect the new beam to the previous beam, and then fix the two steel-concrete composite beams and the supports by workers; S8: Structural preparation: Position the new beam and check whether the contact surface between the new beam and the support is uniform. Use a level to measure the height of the top surface of the new beam and check whether it is horizontal; S9: Load test: After the lifting and connection are completed, the load test is carried out to verify the performance and safety of the structure, and to simulate the actual use conditions by applying loads of different types and sizes; S10: Continuous beam removal: Repeat the steps from S5 to S9 to complete the cross section of the entire structure and then remove the temporary support; S11: Alignment and Inspection: After all steel-concrete composite beams are installed, a final alignment and inspection is performed to ensure the vertical and horizontal alignment of the entire structure.

2. A continuous beam-dropping method for installing a steel-concrete composite beam according to claim 1, characterized in that: The preparation of the steel-concrete composite beam described in S2 includes manufacturing steel beams, manufacturing concrete beam molds, installing steel beams and concrete beam molds, pouring concrete, curing and solidifying, and demolding.

3. The method for installing a continuous steel-concrete composite beam according to claim 1, characterized in that: The hoisting of the steel-concrete composite beam described in S3 includes selecting hoisting equipment, equipping hoisting accessories, checking hoisting equipment, marking hoisting points, determining hoisting sequence, hoisting beams, communication and coordination, monitoring and adjustment, safe placement, and acceptance and inspection.

4. A continuous beam-dropping method for installing a steel-concrete composite beam according to claim 3, characterized in that: The fixing method in S4 and S7 is welding or bolt connection.

5. The method for installing a continuous beam drop of a steel-concrete composite beam according to claim 1, characterized in that: The connection mode of the composite beams in S5 is any one of end-to-end connection, parallel arrangement, cross arrangement and stacking arrangement.

6. The method for installing a continuous steel-concrete composite beam according to claim 1, characterized in that: The calibration method in S6 is divided into construction calibration and reconstruction calibration. The construction calibration performs position calibration according to drawings and design specifications, and the reconstruction calibration performs comparative coordination calibration according to existing steel-concrete composite beams.

7. A continuous beam-dropping method for installing a steel-concrete composite beam according to claim 6, characterized in that: The review in S8 includes re-checking the size, position and horizontal verticality of the beam section and performing structural stability testing under the conditions where different temperature and humidity changes affect the structural performance.

8. A continuous beam-dropping method for installing a steel-concrete composite beam according to claim 7, characterized in that: The structural stability test includes testing the displacement and deformation, load capacity, vibration and resonance of the steel-concrete composite beam and non-destructive testing.

9. The method for installing a continuous steel-concrete composite beam according to claim 1, characterized in that: The different types and sizes of loads described in S9 include static loads, dynamic loads, fatigue loads, impact loads and test loads.

10. A continuous beam-dropping method for installing a steel-concrete composite beam according to claim 8, characterized in that: The non-destructive testing includes weld inspection, ultrasonic inspection and X-ray inspection.

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