Underwater tower crane foundation structure and construction method thereof

Abstract

The invention relates to the field of building construction, in particular to an underwater tower crane foundation structure which comprises at least four cross-shaped beam supporting legs arranged on a bearing platform, a cross-shaped steel beam arranged on the cross-shaped beam supporting legs and a foundation section connecting leg arranged in the center of the cross-shaped steel beam. The cross-shaped beam supporting leg comprises a supporting leg bottom plate, a supporting leg top plate and a supporting leg circular pipe connected between the supporting leg bottom plate and the supporting leg top plate, and the cross-shaped steel beam comprises a main beam and two sections of secondary beams vertically staggered with the main beam. The technical problems that in the prior art, cost is high, the construction period is long, and mounting and dismounting are inconvenient are solved. On the basis, the invention further provides a construction method of the underwater tower crane foundation structure.

Description

Technical Field

[0001] The invention relates to the field of building construction, and in particular to an underwater tower crane foundation structure and a construction method thereof. Background Art

[0002] At present, during the construction of cross-river and cross-sea bridges, the installation of tower crane foundations is usually difficult. The water level line of cross-river (sea) bridge construction is often higher than the top surface of concrete cast-in-place piles, and tower crane construction generally faces the problem of underwater foundation construction. If a cofferdam is built between two concrete cast-in-place piles, it will be difficult to construct a concrete foundation, and there will be great risks and a long construction period; the use of precast concrete blocks for construction is heavy and difficult to dismantle later. For details, please refer to the Chinese patent publication number: CN117071628A discloses an underwater tower crane foundation, including: a combined pile foundation and a steel structure foundation platform, the combined pile foundation includes: a number of concrete cast-in-place pile foundations and a number of steel pipe pile foundations; the concrete cast-in-place pile foundation is composed of a steel cage and concrete; the steel pipe pile foundation is composed of a steel pipe pile and concrete; the steel pipe pile foundation is arranged on the upper part of the concrete cast-in-place pile foundation, the steel structure foundation platform is arranged on the upper part of the concrete cast-in-place pile foundation, and the concrete cast-in-place pile foundation is partially sleeved inside the steel pipe pile foundation.

[0003] Based on the problems of high cost, long construction period and inconvenient installation and disassembly of the existing underwater tower crane foundation structure, the applicant conducted research and development and applied for this patent. Summary of the invention

[0004] Therefore, in view of the above problems, the present invention proposes an underwater tower crane foundation structure, which solves the technical problems of high cost, long construction period and inconvenient installation and disassembly in the prior art. Based on this, a construction method of the underwater tower crane foundation structure is also proposed.

[0005] To achieve the above object, the present invention adopts the following technical solution: an underwater tower crane foundation structure, comprising at least four cross beam legs arranged on a cap, a cross steel beam arranged on the cross beam legs, and a foundation section connecting leg arranged at the center of the cross steel beam;

[0006] The cross beam leg comprises a leg bottom plate, a leg top plate and a leg round tube connected between the leg bottom plate and the leg top plate, a plurality of leg stiffening plates are arranged by welding between the leg bottom plate and the leg top plate and around the circumference of the leg round tube, the leg bottom plate is provided with a leg bolt hole, and the leg bottom plate is connected to the anchor bolts embedded on the cap through the leg bolt hole;

[0007] The cross steel beam comprises a main beam and two sections of secondary beams perpendicularly staggered with the main beam, the two ends of the main beam are respectively connected to the leg top plates of two of the cross beam legs, the main beam is formed by splicing two H-shaped steels, a plurality of first stiffening plates are arranged in the recessed part of the H-shaped steel on the side of the main beam, and second stiffening plates are arranged on the peripheral sides of the two ends of the main beam, the second stiffening plates are trapezoidal plates narrow at the top and wide at the bottom, and the lower end of the second stiffening plate is partially or completely connected to the leg top plates of the cross beam legs, and the two sections of secondary beams are respectively located on the main beam. On both sides of the main beam, the secondary beam is formed by splicing two H-shaped steels, one end of the secondary beam is arranged on the top plate of the leg of one of the cross beam legs, and the other end of the secondary beam is connected to the middle part of the main beam by welding, and a plurality of third stiffening plates are arranged on the side of the secondary beam in the recessed part of the H-shaped steel, and a plurality of fourth stiffening plates are arranged on the peripheral side of one end of the secondary beam connected to the cross beam supporting leg, the fourth stiffening plate is a trapezoidal plate which is narrow on the top and wide on the bottom, and the lower end of the fourth stiffening plate is partially or completely connected to the top plate of the leg of the cross beam leg.

[0008] Furthermore, a reinforcing square tube is connected and arranged between the side surfaces of the main beam and the side surfaces of each secondary beam and near the middle of the main beam, and each reinforcing square tube surrounds the middle of the main beam to form a square frame.

[0009] Furthermore, the square frame has at least two layers.

[0010] Furthermore, the base section connecting leg includes a connecting square tube, connecting stiffening plates welded on four surfaces of the connecting square tube, and a connecting top plate welded on the upper end surfaces of the connecting square tube and the connecting stiffening plates, and the connecting top plate is used to connect to the tower crane.

[0011] Furthermore, the main beam and the secondary beam are respectively provided with lifting ears for connection and fixation during lifting.

[0012] Furthermore, it also includes a pressure monitoring system, which includes a pressure sensor installed at the embedded anchor bolts of the pedestal or on the bottom plate of the cross beam leg. The pressure sensor is used to accurately measure and feedback the stress conditions of the structure and feed back to the pressure monitoring system. When the pressure exceeds a preset safety range, the pressure monitoring system automatically sends a warning signal to ensure the safety of the tower crane foundation structure.

[0013] A construction method for an underwater tower crane foundation structure based on the same inventive concept comprises the following steps:

[0014] The first step is to construct the cap on the cofferdam, tie the steel bars and embed the anchor bolts, and pour the cap concrete;

[0015] The second step is to connect the cross beam legs to the pre-buried anchor bolts through bolts, ensuring that the height of the leg top plate is higher than the construction water level;

[0016] The third step is to splice the main beam and the secondary beam to form a cross steel beam, and weld the cross steel beam to the top plate;

[0017] The fourth step is to weld the foundation section connecting legs to the cross steel beam.

[0018] Furthermore, in the third step, the pressure monitoring system is used to detect the installation of the cross steel beam to ensure the pressure balance and stability; in the fourth step, the pressure monitoring system is used to detect the case of the foundation section connecting legs to ensure the pressure balance and stability.

[0019] Furthermore, the pressure monitoring system includes a pressure sensor installed at the embedded anchor bolts of the foundation or on the bottom plate of the cross beam leg.

[0020] Furthermore, the data of the pressure monitoring system is corrected by a data processing method. After removing the values ​​that exceed the average value by 25% from the measured real-time values, the average value of the data set is calculated again to obtain the corrected data, so as to improve the accuracy of the monitoring results.

[0021] By adopting the above technical solution, the beneficial effects of the present invention are:

[0022] 1. This scheme proposes a new underwater tower crane foundation structure. The structure is mainly composed of at least four cross beam legs, a cross steel beam arranged on the cross beam legs, and a foundation joint connection leg located at the center of the cross steel beam. The stability of the cross beam structure is cleverly utilized, and the embedded anchor bolts on the cap are connected by bolts to achieve the stability and safety of the structure. The combined design of the cross beam legs and the cross steel beam reduces the use of steel, while improving the stability and bearing capacity of the structure.

[0023] This solution greatly reduces the construction difficulty and cost and improves construction efficiency. Secondly, the structure has high stability and load-bearing capacity, which can ensure the safety and stability of the tower crane during construction. In addition, due to the lightweight design and convenient connection method, the structure also reduces the difficulty and cost of hoisting and dismantling. Finally, the structure is also reusable to a certain extent, which is conducive to resource conservation and environmental protection.

[0024] 2. In the prior art, the foundation structure of the tower crane often lacks sufficient reinforcement measures, which makes it easy to deform when subjected to force, affecting construction safety and efficiency. This solution effectively enhances the overall stiffness of the structure and improves its anti-deformation ability by setting reinforced square tubes between the main beam and each secondary beam to form a square frame. This solution not only improves the stability and safety of the tower crane foundation structure, but also extends its service life and reduces maintenance costs. Traditional tower crane foundation structures often only consider single-layer reinforcement measures, which are difficult to meet the force requirements under complex working conditions. This solution further enhances the bearing capacity of the structure by designing at least two layers of square frames, so that it can better adapt to various complex working conditions.

[0025] 3. The connection parts of the traditional tower crane foundation structure are often simply designed and lack sufficient connection strength and stability. This solution optimizes the design of the foundation section connection legs, including connecting square tubes, connecting stiffening plates and connecting top plates, to enhance the strength and stability of the connection parts. This solution not only improves the overall bearing capacity of the tower crane foundation structure, but also reduces the safety risks caused by failure of the connection parts.

[0026] 4. Traditional tower crane foundation structures often lack real-time force monitoring methods during construction, making it difficult to detect safety hazards in a timely manner. This solution introduces a pressure monitoring system to monitor the stress of the structure in real time, so that safety hazards can be discovered in a timely manner and corresponding measures can be taken to ensure construction safety. The pressure monitoring system can achieve installation balance during the installation process and can also achieve effective detection during construction.

[0027] 5. This plan proposes a new construction method, which simplifies the construction steps and improves the construction efficiency by optimizing the construction process. At the same time, this method also ensures the construction quality and safety, and provides a strong guarantee for the rapid construction of the underwater tower crane foundation structure.

[0028] 6. The construction method of the traditional tower crane foundation structure often lacks effective monitoring means during the installation process, making it difficult to ensure the installation quality. This solution ensures the stability and safety of the installation quality by using a pressure monitoring system to monitor the structure in real time during the installation process. This design not only improves the construction efficiency, but also provides strong support for subsequent construction work.

[0029] 7. The pressure monitoring system also includes a data acquisition module, a data processing module and a display module. The data acquisition module is used to acquire data from the pressure sensor, the data processing module is used to process the data acquired by the data acquisition module, and the display module is used to display the data processed by the data processing module. This solution accurately acquires and processes the data of the pressure monitoring system by introducing components such as the data acquisition module, the data processing module and the display module, thereby improving the accuracy and stability of the monitoring data. This design not only provides strong support for safety control and quality control during the construction process.

[0030] 8. This scheme processes the data by removing outliers and then calculating the average value, thus obtaining more accurate and stable monitoring data. This design not only improves the accuracy and reliability of monitoring data, but also provides more accurate data support for safety control and quality control during the construction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0032] Figure 2 It is a schematic diagram of the top structure of the present invention.

[0033] Figure 3 It is a structural diagram of the cross beam legs.

[0034] Figure 4 It is a structural diagram of the main beam.

[0035] Figure 5 It is a structural diagram of the secondary beam.

[0036] Figure 6 It is a structural diagram of a cross steel beam.

[0037] Figure 7 It is a structural diagram of the base section connecting legs.

[0038] Reference numerals:

[0039] 1. Capping platform; 2. Cross beam support leg; 3. Cross steel beam; 4. Foundation section connecting leg; 21. Support leg bottom plate; 22. Support leg top plate; 23. Support leg round tube; 24. Support leg stiffening plate; 25. Support leg bolt hole; 31. Main beam; 32. Secondary beam; 33. Reinforced square tube; 34. Lifting ear; 311. First stiffening plate; 312. Second stiffening plate; 321. Third stiffening plate; 322. Fourth stiffening plate; 323. Fifth stiffening plate; 41. Connecting square tube; 42. Connecting stiffening plate; 43. Connecting top plate. DETAILED DESCRIPTION

[0040] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0041] refer to Figures 1 to 7 This embodiment provides a water tower crane foundation structure, comprising at least four cross beam legs 2 arranged on a cap 1, a cross steel beam 3 arranged on the cross beam legs 2, and a foundation section connecting leg 4 arranged at the center of the cross steel beam 3;

[0042] The cross beam leg 2 includes a leg bottom plate 21, a leg top plate 22, and a leg round tube 23 connected between the leg bottom plate 21 and the leg top plate 22. A plurality of leg stiffening plates 24 are arranged by welding between the leg bottom plate 21 and the leg top plate 22 and around the leg round tube 23. The leg bottom plate 21 is provided with a leg bolt hole 25. The leg bottom plate 21 is connected to the anchor bolts pre-buried on the cap 1 through the leg bolt hole 25.

[0043] The cross steel beam 3 includes a main beam 31 and two sections of secondary beams 32 perpendicularly staggered with the main beam 31. The two ends of the main beam 31 are respectively connected to the leg top plates 22 of two of the cross beam legs 2. The main beam 31 is formed by splicing two H-shaped steels. A plurality of first stiffening plates 311 are arranged on the side of the main beam 31 in the recessed part of the H-shaped steel. Second stiffening plates 312 are arranged on the circumferential sides of the two ends of the main beam 31. The second stiffening plates 312 are trapezoidal plates that are narrow at the top and wide at the bottom. The lower ends of the second stiffening plates 312 are partially or completely connected to the leg top plates 22 of the cross beam legs 2. The two sections of secondary beams 32 are respectively located on the main beam 31. On both sides of the beam 31, the secondary beam 32 is formed by splicing two H-shaped steels, one end of the secondary beam 32 is arranged on the leg top plate 22 of one of the cross beam legs 2, and the other end of the secondary beam 32 is connected to the middle of the main beam 31 by welding. A plurality of third stiffening plates 321 are arranged on the side of the secondary beam 32 in the recessed part of the H-shaped steel, and a plurality of fourth stiffening plates 322 are arranged on the peripheral side of the end of the secondary beam 32 connected to the cross beam support leg. The fourth stiffening plates 322 are trapezoidal plates with narrow upper and wide lower parts, and the lower end of the fourth stiffening plates 322 is partially or completely connected to the leg top plate 22 of the cross beam leg 2. A plurality of fifth stiffening plates 323 are also arranged at the end of the secondary beam 32 connected to the main beam 31.

[0044] A reinforcing square tube 33 is connected between the side of the main beam 31 and the side of each secondary beam 32 and near the middle of the main beam 31. Each reinforcing square tube 33 forms a square frame around the middle of the main beam 31. The square frame has at least two layers.

[0045] The base section connecting leg 4 includes a connecting square tube 41, a connecting stiffening plate 42 welded on four surfaces of the connecting square tube 41, and a connecting top plate 43 welded on the upper end surfaces of the connecting square tube 41 and the connecting stiffening plate 42, wherein the connecting top plate 43 is used to connect to the tower crane.

[0046] The main beam 31 and the secondary beam 32 are respectively provided with lifting ears 34 for connection and fixation during lifting.

[0047] It also includes a pressure monitoring system, which includes a pressure sensor installed at the embedded anchor bolts of the base 1 or on the leg bottom plate 21 of the cross beam leg 2. The pressure sensor is used to accurately measure and feedback the stress conditions of the structure and feed back to the pressure monitoring system. When the pressure exceeds a preset safety range, the pressure monitoring system automatically sends a warning signal to ensure the safety of the tower crane foundation structure.

[0048] A construction method for an underwater tower crane foundation structure based on the same inventive concept comprises the following steps:

[0049] The first step is to construct the cap 1 of the cofferdam, tie the steel bars and embed the anchor bolts, and pour the concrete of the cap 1;

[0050] The second step is to connect the cross beam legs 2 to the pre-buried anchor bolts by bolts, ensuring that the height of the leg top plate 22 is higher than the construction water level;

[0051] The third step is to splice the main beam 31 and the secondary beam 32 to form a cross steel beam 3, and weld the cross steel beam 3 to the top plate;

[0052] The fourth step is to weld the foundation section connecting leg 4 to the cross steel beam 3.

[0053] In the third step, the installation of the cross steel beam 3 is detected by using the pressure monitoring system to ensure the pressure is balanced and stable; in the fourth step, the case of the foundation section connecting leg 4 is detected by using the pressure monitoring system to ensure the pressure is balanced and stable.

[0054] The pressure monitoring system includes a pressure sensor (not shown in the figure) installed at the embedded anchor bolt of the pedestal 1 or on the leg bottom plate 21 of the cross beam leg 2. The structure and installation of the pressure sensor are conventional technical means in this field. The pressure monitoring system also includes a data acquisition module, a data processing module and a display module. The data acquisition module is used to collect data from the pressure sensor, the data processing module is used to process the data collected by the data acquisition module, and the display module is used to display the data processed by the data processing module. This solution introduces components such as data acquisition modules, data processing modules and display modules to accurately collect and process the data of the pressure monitoring system, thereby improving the accuracy and stability of the monitoring data. This solution not only provides strong support for safety control and quality control during the construction process.

[0055] The data of the pressure monitoring system is corrected through data processing methods. After eliminating the values ​​that exceed the average value by 25% in the measured real-time values, the corrected data is obtained by calculating the average value of the data set again to improve the accuracy of the monitoring results.

[0056] 1. Assume that the original measured pressure data set is {P1, P2, ... P n};

[0057] 2. Calculate the average value of the original data set

[0058]

[0059] 3. Eliminate values ​​that exceed the average by 25%, and eliminate all or The values ​​of the modified data set {P1', P2', ... P' m}, where m≤n;

[0060] 4. Correct the data and obtain the corrected value H:

[0061]

[0062] in, and

[0063] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. An underwater tower crane foundation structure, characterized in that: It includes at least four cross beam legs arranged on the cap, a cross steel beam arranged on the cross beam legs, and a foundation section connecting leg arranged at the center of the cross steel beam; The cross beam leg comprises a leg bottom plate, a leg top plate and a leg round tube connected between the leg bottom plate and the leg top plate, a plurality of leg stiffening plates are arranged by welding between the leg bottom plate and the leg top plate and around the circumference of the leg round tube, the leg bottom plate is provided with a leg bolt hole, and the leg bottom plate is connected to the anchor bolts embedded on the cap through the leg bolt hole; The cross steel beam comprises a main beam and two sections of secondary beams perpendicularly staggered with the main beam, the two ends of the main beam are respectively connected to the leg top plates of two of the cross beam legs, the main beam is formed by splicing two H-shaped steels, a plurality of first stiffening plates are arranged in the recessed part of the H-shaped steel on the side of the main beam, and second stiffening plates are arranged on the peripheral sides of the two ends of the main beam, the second stiffening plates are trapezoidal plates narrow at the top and wide at the bottom, and the lower end of the second stiffening plate is partially or completely connected to the leg top plates of the cross beam legs, and the two sections of secondary beams are respectively located on the main beam. On both sides of the main beam, the secondary beam is formed by splicing two H-shaped steels, one end of the secondary beam is arranged on the top plate of the leg of one of the cross beam legs, and the other end of the secondary beam is connected to the middle part of the main beam by welding, and a plurality of third stiffening plates are arranged on the side of the secondary beam in the recessed part of the H-shaped steel, and a plurality of fourth stiffening plates are arranged on the peripheral side of one end of the secondary beam connected to the cross beam supporting leg, the fourth stiffening plate is a trapezoidal plate which is narrow on the top and wide on the bottom, and the lower end of the fourth stiffening plate is partially or completely connected to the top plate of the leg of the cross beam leg.

2. The underwater tower crane foundation structure according to claim 1, characterized in that: A reinforced square tube is connected and arranged between the side surfaces of the main beam and the side surfaces of each secondary beam and near the middle of the main beam, and each reinforced square tube surrounds the middle of the main beam to form a square frame.

3. The underwater tower crane foundation structure according to claim 2, characterized in that: The square frame has at least two layers.

4. The underwater tower crane foundation structure according to claim 1, characterized in that: The base section connecting leg comprises a connecting square tube, connecting stiffening plates welded on four surfaces of the connecting square tube, and a connecting top plate welded on the upper surfaces of the connecting square tube and the connecting stiffening plates, wherein the connecting top plate is used to connect to the tower crane.

5. The underwater tower crane foundation structure according to claim 1, characterized in that: The main beam and the secondary beam are respectively provided with lifting ears for connection and fixation during lifting.

6. The underwater tower crane foundation structure according to claim 1, characterized in that: It also includes a pressure monitoring system, which includes a pressure sensor installed at the embedded anchor bolts of the pedestal or on the bottom plate of the cross beam leg. The pressure sensor is used to accurately measure and feedback the stress conditions of the structure and feed back to the pressure monitoring system. When the pressure exceeds a preset safety range, the pressure monitoring system automatically sends a warning signal to ensure the safety of the tower crane foundation structure.

7. A construction method for an underwater tower crane foundation structure according to any one of claims 1 to 5, characterized in that: The following steps are involved: The first step is to construct the cap on the cofferdam, tie the steel bars and embed the anchor bolts, and pour the cap concrete; The second step is to connect the cross beam legs to the pre-buried anchor bolts through bolts, ensuring that the height of the leg top plate is higher than the construction water level; The third step is to splice the main beam and the secondary beam to form a cross steel beam, and weld the cross steel beam to the top plate; The fourth step is to weld the foundation section connecting legs to the cross steel beam.

8. The construction method of an underwater tower crane foundation structure according to claim 7, characterized in that: In the third step, the pressure monitoring system is used to detect the installation of the cross steel beam to ensure the pressure balance and stability; in the fourth step, the pressure monitoring system is used to detect the foundation section connecting legs to ensure the pressure balance and stability.

9. The construction method of an underwater tower crane foundation structure according to claim 8, characterized in that: The pressure monitoring system comprises a pressure sensor installed at the embedded anchor bolts of the foundation or on the leg bottom plate of the cross beam leg.

10. The construction method of an underwater tower crane foundation structure according to claim 8, characterized in that: The data of the pressure monitoring system is corrected through data processing methods. After eliminating the values ​​that exceed the average value by 25% in the measured real-time values, the corrected data is obtained by calculating the average value of the data set again to improve the accuracy of the monitoring results.

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