Steel cover beam frame high support base plate and mounting method thereof

Abstract

The invention discloses a steel cover beam frame high support base plate and a mounting method thereof, and belongs to the technical field of bridge building construction support base plate mounting. According to the technical scheme, the device comprises a support base plate and a connector arranged at the bottom of the support base plate, a lead screw is arranged at the bottom of the connector, the bottom of the lead screw is connected with a cover beam top plate, and an upper opening nut and a lower opening nut are arranged on the cover beam top plate. The method has the beneficial effects that in a machining factory, the elevated support base plates and the steel cover beam are connected into a whole through the lead screws, the relative position of the whole support base plate group is measured, the flatness of the support base plates is machined, the precision and the connecting strength of the support base plates and the cover beam are higher than those of secondary installation of the steel reinforcement framework erected at the bridge site, and the site construction precision and quality are also guaranteed; and the overhead working amount of the bridge site is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of bridge construction support pad installation, and in particular to a steel cap beam elevated support pad and an installation method thereof. Background Art

[0002] During the bridge construction process, the installation accuracy of the bearing pad is an important factor that determines the installation quality of the bearing. The bearing pad is an important link between the prefabricated steel beam and the cap beam, and is a very important force transmission and leveling component. This determines that the installation and flatness control of the bearing pad is particularly critical. Due to the different forms of the prefabricated beam sections on the same cap beam, the height difference between some prefabricated beam sections and the cap beam is large, and the bearing pad needs to be raised. With the development of prefabricated steel structures, the cap beams are gradually transformed from concrete structures to steel structures. Due to the elevation requirements, some bearing pads are far away from the top plate of the cap beam, about 200 to 600 mm. It is more economical to use concrete grouting between the bearing pad and the cap beam than to use steel plates as a whole.

[0003] At present, the conventional practice is to transport the cap beam to the bridge site, set up a steel frame under the bearing pad, and then cast it together with the bearing pad. This solution takes a long time and increases the amount of work at the bridge site. Now a simpler solution has been designed. When processing the cap beam in the factory, the elevation of the bearing pad is directly fixed, and the bridge site can be directly cast. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a steel cap beam elevated bearing pad and an installation method thereof, which solves the problems of long bearing pad installation period and large bridge workload in the prior art.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] A steel cap beam raised support pad comprises a support pad, a connector arranged at the bottom of the support pad, a screw rod is arranged at the bottom of the connector, the bottom of the screw rod is connected to the cap beam top plate, and an upper nut and a lower nut are arranged on the cap beam top plate.

[0007] The upper nut is arranged above the connection point between the screw rod and the cap beam top plate, and the lower nut is arranged below the connection point between the screw rod and the cap beam top plate;

[0008] The top of the screw rod is threadedly connected to the connector, and the bottom of the screw rod is threadedly connected to the upper nut and the lower nut. This design allows the support pad to be connected to the cap beam top plate through the screw rod, achieving precise adjustment of height and position, and improving the flexibility and accuracy of installation.

[0009] The cap beam top plate is also provided with a number of shear nails. The lower part of the raised support pad is welded with a connector, and the elevation and flatness of the support pad are adjusted through the screw rod and the upper and lower bolts of the cap beam. The construction personnel inside the cap beam still stay and process together with other fixed support pads on the cap beam.

[0010] An upper nut is set above the connection point between the screw rod and the top plate of the cap beam, and a lower nut is set below. The top of the screw rod is threadedly connected to the connector, and the bottom is threadedly connected to the upper and lower nuts. Through the threaded connection, the length of the screw rod can be easily adjusted, thereby adjusting the height of the support pad to ensure accurate docking with the cap beam, thereby enhancing the stability and reliability of the structure.

[0011] A method for installing a steel cap beam elevated support pad includes the following steps:

[0012] S1. According to the support type, installation position and stress conditions, determine the height, thickness, hole group and screw rod specifications of the support pad, and add a hole group at the relative position of the cap beam top plate;

[0013] S2. A connector is welded to the lower part of the support pad. The function of the connector is to allow the support to share the support pad hole group. The bottom of the connector is threaded and the top of the screw is screwed into the connector. A foam board is placed in the support pad installation area to protect the paint. The foam board is cut according to the specifications of the support base plate.

[0014] S3. When hoisting the support plate, use a suction cup to hoist it;

[0015] S4. The support pad is slowly hoisted to the upper surface of the center of the support pad to about the design height of the cap beam top plate. The support pad is fine-tuned by the jack, and the three-dimensional elevation data of the center and four corners of the upper surface of the support pad is measured using a three-dimensional measuring instrument. After the relevant measurement data meets the design elevation; according to the size specifications of the nut, apply the corresponding torque according to the specifications to ensure thread engagement; and draw a height mark line at the position of the upper screw of the top plate nut, and draw a bolt tightening inspection line at the corresponding position of the top plate nut and the steel cap beam; according to the specifications, apply the corresponding torque to the lower nut of the top plate to solidify the nut and the screw into a whole, so as to ensure that the lower nut will no longer move relative to each other in the future, and ensure that the elevation data of the support pad is not affected;

[0016] S5. Loosen the jack and the nuts on the top of the cap beam, slowly lower the support base plate onto the foam board with a suction cup, re-fix the nuts on the top of the cap beam, and tighten them to a general state; use a binding belt to fix the support pad to the cap beam, lower the height of the support pad, and reduce transportation risks; after the support pad is installed, seal the construction holes of the steel cap beam and repair the paint;

[0017] S6. After the cap beam bridge is installed, directly loosen the nut on the top plate of the cap beam, slowly lift the support pad to the screw mark position corresponding to the upper screw, apply the corresponding torque according to the specification requirements, and after the top plate nut and the cap beam inspection line coincide, install the formwork and pour concrete.

[0018] The installation method proposed in this scheme includes the steps of determining the parameters of the bearing pad, welding the connector, hoisting with a suction cup, fine-tuning and measuring, applying torque, etc. This installation method makes the installation process of the bearing pad more accurate and efficient, reduces the workload of on-site construction, and improves the construction quality.

[0019] In step S2, the upper surface of the support pad is processed flat as a whole, and the flatness meets 1mm / m. The high-precision flatness requirement ensures the close contact between the support pad and the cap beam top plate, and improves the overall stability and force transmission efficiency of the structure.

[0020] In step S2, the length of the screw rod screwed into the connector is determined according to pre-calculation, with a tolerance of 0 to 3 mm. Accurately controlling the length of the screw rod can ensure the precise elevation and position of the support plate after installation, thereby reducing installation errors.

[0021] In step S2, the height of the foam board is 200 mm.

[0022] In step S2, after the foam board is installed, it is wrapped with a wrapping film to protect the paint of the cap beam and the support pad. After the foam board is installed, it is wrapped with a wrapping film to further protect the paint surface.

[0023] In step S3, the suction cup needs to be wrapped with a wrapping film and pearl cotton when in use, and the bottom of the suction cup must not directly contact the painted surface of the support pad to ensure that the paint is not damaged. The use of wrapping film provides an additional layer of protection to ensure that the painted surface is not damaged during the construction process, extending the beauty and service life of the structure. When using the suction cup for hoisting, it needs to be wrapped with a wrapping film and pearl cotton to prevent the suction cup from directly contacting the painted surface. This protective measure ensures that the painted surface of the support pad will not be damaged during the hoisting process, maintaining the beauty of the structure.

[0024] In step S4, relevant glue is applied to the lower nut position, and the gluing range is the thickness of the nut plus 2 mm.

[0025] In summary, this plan aims to improve the installation accuracy, stability and safety of the steel cap beam support pad through specific design or construction steps, while reducing the risk of damage during construction and improving construction efficiency and quality.

[0026] In this scheme, the steel cap beam is the main load-bearing structure, with dense internal ribs and small space. Considering the safety and anti-corrosion requirements and the actual situation on site (the steel cap beam is a complete structure and no internal construction is required), the steel cap beam is a closed box after leaving the factory. Considering the high-precision requirements for the relative position and elevation of the steel beam on the cap beam, as well as the stress conditions of the support pads, in the processing factory, the elevated support pads are connected to the steel cap beam as a whole through screws, and the relative position of the support pad group is measured as a whole, and the flatness of the support pads is processed. The accuracy of the support pads and the connection strength with the cap beam are higher than the secondary installation of the steel frame at the bridge site. The accuracy and quality of the on-site construction are also guaranteed, and the amount of high-altitude work at the bridge site is reduced.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a steel cap beam elevated support pad and an installation method thereof. In the processing factory, the elevated support pad is connected to the steel cap beam as a whole by a screw rod, the relative position of the support pad group is measured as a whole, and the flatness of the support pad is processed. The precision of the support pad and the connection strength with the cap beam are higher than that of the secondary installation of the steel frame at the bridge position. The accuracy and quality of the on-site construction are also guaranteed, and the amount of high-altitude operations at the bridge position is reduced. The advantages are mainly reflected in the following aspects:

[0028] (1) Improving installation accuracy and connection strength: This solution uses screws to connect the elevated support pads to the steel cap beam as a whole in the processing factory, thereby achieving overall measurement of the support pad group, precise control of the relative position, and fine processing of the flatness of the support pads. Compared with the traditional method of setting up a steel skeleton on site and installing the support pads twice, this method significantly improves the installation accuracy and connection strength with the cap beam.

[0029] (2) Improve on-site construction efficiency and quality: Since the connection and adjustment between the bearing pad and the steel cap beam have been completed in the factory, only simple lifting and fixing are required during on-site construction, which greatly reduces the workload at the bridge site and improves construction efficiency. At the same time, since the complexity of on-site construction is reduced, the construction quality is also guaranteed.

[0030] (3) Reduce the amount of high-altitude work: This solution reduces the amount of high-altitude work on the bridge site, reduces construction risks, and also reduces the labor intensity of workers;

[0031] (4) Improved economy: By using the connection method of screw rods and nuts instead of the traditional concrete grouting method, the connection between the bearing pad and the cap beam is more economical, especially when the elevation requirement is high. This method is more economical than using steel plates as a whole.

[0032] (5) Protect the painted surface and extend the service life: During the hoisting and installation process, the painted surface of the support pad and cap beam is effectively protected by using protective measures such as foam board and wrapping film, reducing the damage to the paint during the construction process, thereby extending the service life of the structure;

[0033] (6) Improve construction safety: By reducing the complexity of high-altitude operations and on-site construction, this solution reduces safety risks during the construction process and ensures the safety of workers;

[0034] (7) Strong adaptability: This solution can flexibly determine the height, thickness, hole group and screw rod specifications of the support plate according to different support types, installation positions and stress conditions, and has strong adaptability and flexibility;

[0035] (8) Environmental protection during construction: By reducing on-site construction work, this solution helps to reduce noise and waste during the construction process, has less impact on the environment, and meets the requirements of modern green construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0037] Figure 1 The present invention is a schematic diagram of the installation of the steel cap beam elevated support pad according to an embodiment of the present invention.

[0038] Figure 2 It is a structural schematic diagram of the installation state of the steel cap beam elevated support pad according to an embodiment of the present invention.

[0039] Figure 3 It is a structural schematic diagram of the installation state of the steel cap beam elevated support pad according to an embodiment of the present invention.

[0040] Among them, the figure markings are: 1. support pad; 2. connector; 3. screw rod; 4. cap beam top plate; 5. upper nut; 6. lower nut; 7. shear nail; 8. foam board; 9. binding belt. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0042] The present invention provides a steel cap beam raising support pad, comprising a support pad 1, a connector 2 arranged at the bottom of the support pad 1, a screw rod 3 arranged at the bottom of the connector 2, the bottom of the screw rod 3 is connected to the cap beam top plate 4, and an upper nut 5 and a lower nut 6 are arranged on the cap beam top plate 4. Figure 1 to Figure 2 shown.

[0043] An upper nut 5 is provided above the connection point between the screw rod 3 and the cap beam top plate 4, and a lower nut 6 is provided below the connection point between the screw rod 3 and the cap beam top plate 4;

[0044] The top of the screw rod 3 is threadedly connected to the connector 2 , and the bottom of the screw rod 3 is threadedly connected to the upper nut 5 and the lower nut 6 .

[0045] The connector is welded at the bottom of the elevated support plate, and the elevation and flatness of the support plate are adjusted through the screw rod and the upper and lower bolts of the cap beam. The construction personnel remain inside the cap beam and process it together with other fixed support plates on the cap beam.

[0046] A method for installing a steel cap beam elevated support pad includes the following steps:

[0047] S1. According to the support type, installation position and stress conditions, determine the height, thickness, hole group and screw rod specifications of the support pad, and add a hole group at the relative position of the cap beam top plate;

[0048] S2. A connector is welded to the lower part of the support pad. The function of the connector is that the support can share the support pad hole group. The bottom of the connector is threaded and the top of the screw is screwed into the connector. A foam board 8 is placed in the support pad installation area to protect the paint. The foam board 8 is cut according to the specifications of the support bottom plate, such as Figure 3 As shown;

[0049] S3. When hoisting the support plate, use a suction cup to hoist it;

[0050] S4. The support pad is slowly hoisted to the upper surface of the center of the support pad to about the design height of the cap beam top plate. The support pad is fine-tuned by the jack, and the three-dimensional elevation data of the center and four corners of the upper surface of the support pad is measured using a three-dimensional measuring instrument. After the relevant measurement data meets the design elevation; according to the size specifications of the nut, apply the corresponding torque according to the specifications to ensure thread engagement; and draw a height mark line at the position of the upper screw of the top plate nut, and draw a bolt tightening inspection line at the corresponding position of the top plate nut and the steel cap beam; according to the specifications, apply the corresponding torque to the lower nut of the top plate to solidify the nut and the screw into a whole, so as to ensure that the lower nut will no longer move relative to each other in the future, and ensure that the elevation data of the support pad is not affected;

[0051] S5. Loosen the jack and the nuts on the upper part of the cap beam top plate, slowly lower the support bottom plate onto the foam board with a suction cup, re-fix the nuts on the upper part of the cap beam top plate, and tighten them to a general state; and use the binding belt 9 to fix the support pad to the cap beam, lower the height of the support pad, and reduce transportation risks; after the support pad is installed, seal the construction holes of the steel cap beam and repair the paint;

[0052] S6. After the cap beam bridge is installed, directly loosen the nut on the top plate of the cap beam, slowly lift the support pad to the screw mark position corresponding to the upper screw, apply the corresponding torque according to the specification requirements, and after the top plate nut and the cap beam inspection line coincide, install the formwork and pour concrete.

[0053] In step S2, the upper surface of the support pad is processed into a flat surface with a flatness of 1 mm / m.

[0054] In step S2, the length of the screw rod screwed into the connector is determined according to pre-calculation, with a tolerance of 0 to 3 mm.

[0055] In step S2, after the foam board is installed, it is wrapped with a wrapping film to protect the paint on the cap beam and the support pad.

[0056] In step S3, the suction cup needs to be wrapped with a wrapping film and pearl cotton when in use, and the bottom surface of the suction cup must not directly contact the painted surface of the support pad to ensure that the paint is not damaged.

[0057] Example 2

[0058] On the basis of Example 1, a plurality of shear nails 7 are further provided on the cap beam top plate 4 to enhance the connection strength between the cap beam top plate and the support pad.

[0059] The use of shear nails improves the shear resistance of the structure, ensuring that the connection between the support pad and the cap beam top plate will not slide relative to each other when subjected to force, thereby improving the safety of the structure.

[0060] Example 3

[0061] On the basis of Example 1, in step S2, the height of the foam board 8 is 200 mm.

[0062] A 200mm high foam board is used as a buffer and protective layer between the bearing pad and the cap beam. The use of the foam board not only protects the painted surface of the bearing pad and the cap beam, but also provides a certain buffering effect, reducing the risk of damage during transportation and installation.

[0063] Example 4

[0064] On the basis of Example 1, in step S4, relevant glue is applied to the lower nut position, and the gluing range is the thickness of the nut plus 2 mm.

[0065] The use of glue can enhance the bonding strength between the nuts and the cap beam top plate, prevent the nuts from loosening, and improve the stability and durability of the structure.

[0066] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A steel cap beam raised support plate, characterized in that: The invention comprises a support pad (1), a connector (2) arranged at the bottom of the support pad (1), a screw rod (3) arranged at the bottom of the connector (2), the bottom of the screw rod (3) being connected to a cap beam top plate (4), and an upper nut (5) and a lower nut (6) being arranged on the cap beam top plate (4).

2. The steel cap beam elevated support pad according to claim 1 is characterized in that: The upper nut (5) is arranged above the connection point between the screw rod (3) and the cap beam top plate (4), and the lower nut (6) is arranged below the connection point between the screw rod (3) and the cap beam top plate (4); The top of the screw rod (3) is threadedly connected to the connector (2), and the bottom of the screw rod (3) is threadedly connected to the upper nut (5) and the lower nut (6).

3. The steel cap beam elevated support pad according to claim 2 is characterized in that: A plurality of shear nails (7) are also arranged on the cap beam top plate (4).

4. A method for installing a steel cap beam elevated support plate according to claim 2, characterized in that: The following steps are involved: S1. According to the support type, installation position and stress conditions, determine the height, thickness, hole group and screw rod specifications of the support pad, and add a hole group at the relative position of the cap beam top plate; S2. A connector is welded to the lower part of the support pad, and threads are processed at the bottom of the connector. The top of the screw rod is screwed into the connector; and a foam board (8) is placed in the installation area of ​​the support pad to protect the paint. The foam board (8) is cut according to the specifications of the support bottom plate; S3. When hoisting the support plate, use a suction cup to hoist it; S4. The support pad is hoisted to the upper surface of the center of the support pad to the design height of the cap beam top plate. The support pad is fine-tuned by the jack, and the three-dimensional data of the elevation of the center and four corners of the upper surface of the support pad is measured by a three-dimensional measuring instrument. After the relevant measured data meets the design elevation; according to the size specifications of the nut, apply the corresponding torque according to the requirements of the specification to ensure the thread engagement; and draw a height mark line at the position of the screw rod at the upper end of the top plate nut, and draw a bolt tightening inspection line at the corresponding position of the top plate nut and the steel cap beam; apply the corresponding torque to the nut at the lower end of the top plate according to the requirements of the specification to solidify the nut and the screw rod into a whole; S5. Loosen the jack and the nuts on the top of the cap beam, lower the support base plate onto the foam board with a suction cup, and re-fix the nuts on the top of the cap beam; use a binding tape (9) to fix the support pad to the cap beam to lower the height of the support pad; after the support pad is installed, seal the construction holes of the steel cap beam and repair the paint; S6. After the cap beam bridge is installed, directly loosen the nut on the top plate of the cap beam, lift the support pad to the screw mark position corresponding to the upper screw, apply the corresponding torque according to the specification requirements, and after the top plate nut and the cap beam inspection line coincide, install the formwork and pour concrete.

5. The method for installing a steel cap beam elevated support plate according to claim 4 is characterized in that: In step S2, the upper surface of the support pad is processed into a flat surface with a flatness of 1 mm / m.

6. The method for installing a steel cap beam elevated support plate according to claim 4 is characterized in that: In step S2, the length of the screw rod screwed into the connector is determined according to pre-calculation, with a tolerance of 0 to 3 mm.

7. The method for installing a steel cap beam elevated support plate according to claim 4 is characterized in that: In step S2, the foam board (8) is 200 mm high.

8. The method for installing a steel cap beam elevated support plate according to claim 4 is characterized in that: In step S2, after the foam board is installed, it is wrapped with a wrapping film to protect the paint on the cap beam and the support pad.

9. The method for installing a steel cap beam elevated support plate according to claim 4, characterized in that: In step S3, the suction cup needs to be wrapped with a wrapping film and pearl cotton when in use, and the bottom surface of the suction cup must not directly contact the painted surface of the support pad to ensure that the paint is not damaged.

10. The method for installing a steel cap beam elevated support plate according to claim 4, characterized in that: In step S4, relevant glue is applied to the lower nut position, and the gluing range is the thickness of the nut plus 2 mm.

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