Large-span prestressed bailey beam and lifting method thereof

Abstract

The invention discloses a large-span prestress bailey beam and a lifting method thereof. The large-span prestress bailey beam comprises a bailey beam body, a vertical beam, an auxiliary tensioning component, a lifting mechanism and an intelligent building integration platform. The bailey beams are installed on the vertical beams, the bailey beams are provided with auxiliary tensioning components, and the lifting mechanism is installed on the upper portions of the bailey beams and connected with the intelligent building integrated platform through steel strands. The intelligent construction integrated platform has the beneficial effects that the intelligent construction integrated platform can provide a larger load condition in the construction process, the construction convenience is improved, the operation and stress conditions of all mechanisms can be clearly known in the lifting and falling process, and the construction safety is guaranteed to a great extent.

Description

Technical Field

[0001] This invention relates to the field of engineering construction technology, and in particular to a large-span prestressed Bailey beam and its lifting method. Background Technology

[0002] As my country's construction industry gradually moves towards intelligence, digitalization, and greening, intelligent integrated equipment has gradually replaced traditional manufacturing processes. Currently, the most widely used equipment includes intelligent construction robots, intelligent tower cranes, and intelligent elevators.

[0003] For the construction of grain warehouses, oil depots, sewage treatment ponds, etc., China Construction Third Engineering Bureau has recently developed a silo-type intelligent construction integrated platform (referred to as silo machine). This equipment is mainly composed of upper and lower Bailey platforms, column support, walking mechanism, formwork and protection system. The intelligent construction integrated platform is suspended by the upper platform, with a total weight of 160 tons. The upper platform has a long span of 32m, and the deflection is large during hoisting, which poses a significant safety hazard.

[0004] Therefore, it is necessary to propose a large-span prestressed Bailey beam and its lifting method to address the above problems. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide a large-span prestressed Bailey beam and its lifting method to solve the above problems.

[0006] A long-span prestressed Bailey bridge includes a Bailey bridge, a vertical beam, an auxiliary tensioning member, a lifting mechanism, and an intelligent construction integration platform. The Bailey bridge is installed on the vertical beam, the auxiliary tensioning member is installed on the Bailey bridge, the lifting mechanism is installed on the upper part of the Bailey bridge, and the lifting mechanism is connected to the intelligent construction integration platform through steel strands.

[0007] Preferably, the auxiliary tensioning component includes a tensioning support, a sliding axial block, and a threaded steel bar. The tensioning support is installed at both ends of the Bailey beam, and several sliding axial blocks are installed at the lower part of the Bailey beam and placed at the lower part of the lifting mechanism. The two ends of the threaded steel bar are connected to the tensioning support, and the middle position of the threaded steel bar passes through the sliding axial block.

[0008] Preferably, the rebar is 930 precision rolled rebar.

[0009] Preferably, the lifting mechanism 4 includes a through-hole jack, a lifting pump station, and a lifting top support. The lifting pump station is installed on the upper part of the Bailey beam, and the through-hole jack is installed on the Bailey beam through the lifting top support. The lifting pump station provides a power source for the through-hole jack.

[0010] Preferably, the intelligent construction integration platform includes a platform frame and lifting supports, with lifting supports installed at all four corners of the platform frame.

[0011] Preferably, the lower end of the steel strand is connected to the lower support of the lifting top, and the upper end of the steel strand passes through the upper support of the lifting top and the connecting through-hole jack.

[0012] Preferably, an electronic level is installed on the platform frame, and several high-definition cameras are installed on the Bailey beam.

[0013] Preferably, the booster pump station is equipped with a PLC controller, which is electrically connected to the through-hole jack, the electronic level and the high-definition camera.

[0014] Preferably, the PLC controller is connected to a ground control box via a network module, and the ground control box is connected to a touch screen display.

[0015] A method for raising and lowering a large-span prestressed Bailey beam, the steps of which are as follows: S1. After the Bailey beam of the silo machine is installed, install the lifting top support, then install the through jack, and then install the steel strand through the through jack. S2. Then install the booster pump station. The booster pump station is equipped with a PLC controller and is connected to the through-hole jack via a data cable. The real-time information of the through-hole jack is transmitted to the ground control box through a network bridge. S3. Install tensioning supports and sliding axial blocks, insert 930 precision rolled threaded steel bars, connect hydraulic jacks for tensioning, and at the same time install lifting under-supports on the intelligent construction integration platform. S4, steel strands connect to the intelligent construction integration platform, completing the assembly of the entire system.

[0016] Compared with the prior art, the beneficial effects of the present invention are: the intelligent construction integrated platform can provide greater load-bearing conditions during construction, increase construction convenience, and clearly understand the operation and stress of various mechanisms during lifting and lowering, thus greatly ensuring construction safety. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a schematic diagram of the three-dimensional structure of the large-span prestressed Bailey beam of the present invention.

[0019] Figure 3 This is a top view of the large-span prestressed Bailey beam of the present invention.

[0020] Figure 4 This is a front view of the large-span prestressed Bailey beam of the present invention.

[0021] Figure 5This is a three-dimensional structural diagram of the intelligent construction integration platform of the present invention; Figure 6 This is a flowchart of the lifting method of the present invention; Figure 7 This is a block diagram of the PLC controller module of the present invention.

[0022] The attached diagram is labeled as follows: 1. Bailey beam; 2. Vertical beam; 3. Auxiliary tensioning component; 4. Lifting mechanism; 5. Intelligent construction integrated platform; 31. Tensioning support; 32. Sliding axial block; 33. Precision rolled threaded steel bar; 41. Through-hole jack; 42. Lifting pump station; 43. Lifting top support; 51. Platform frame; 52. Lifting bottom support; 6. Steel strand; 7. PLC controller; 8. Electronic level; 9. High-definition camera; 10. Ground control box; 11. Touch screen display; 12. Network module. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0024] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0027] like Figure 1 and combined Figures 2 to 7 As shown, a long-span prestressed Bailey beam includes a Bailey beam 1, a vertical beam 2, an auxiliary tensioning member 3, a lifting mechanism 4, and an intelligent construction integration platform 5. The Bailey beam 1 is installed on the vertical beam 2, the auxiliary tensioning member 3 is installed on the Bailey beam 1, the lifting mechanism 4 is installed on the upper part of the Bailey beam 1, and the lifting mechanism 4 is connected to the intelligent construction integration platform 5 through steel strands 6.

[0028] Furthermore, the auxiliary tensioning component 3 includes a tensioning support 31, a sliding axial block 32, and a precision-rolled threaded steel bar 33. The tensioning support 31 is installed at both ends of the Bailey beam 1, and several sliding axial blocks 32 are installed at the lower part of the Bailey beam 1 and placed at the lower part of the lifting mechanism 4. The two ends of the precision-rolled threaded steel bar 33 are connected to the tensioning support 31, and the middle position of the precision-rolled threaded steel bar 33 passes through the sliding axial block 32.

[0029] Furthermore, the precision-rolled threaded steel bar 33 is made of 930 precision-rolled threaded steel bar.

[0030] Furthermore, the lifting mechanism 4 includes a through-hole jack 41, a lifting pump station 42, and a lifting top support 43. The lifting pump station 42 is installed on the upper part of the Bailey beam 1, and the through-hole jack 41 is installed on the Bailey beam 1 through the lifting top support 43. The lifting pump station 42 provides a power source for the through-hole jack 41.

[0031] Furthermore, the intelligent construction integration platform 5 includes a platform frame 51 and lifting support 52, with lifting support 52 installed on each of the four corners of the platform frame 51.

[0032] Furthermore, the lower end of the steel strand 6 is connected to the lower support 52 of the lifting top, and the upper end of the steel strand 6 passes through the upper support 43 of the lifting top and is connected to the through-hole jack 41.

[0033] Furthermore, an electronic level 8 is installed on the platform frame 51, and several high-definition cameras 9 are installed on the Bailey beam 1.

[0034] Furthermore, the booster pump station 42 is equipped with a PLC controller 7, which is electrically connected to the through-hole jack 41, the electronic level 8, and the high-definition camera 9.

[0035] Furthermore, the PLC controller 7 is connected to the ground control box 10 via the network module 12, and the ground control box 10 is connected to a touch screen display 11.

[0036] A method for raising and lowering a large-span prestressed Bailey beam, the steps of which are as follows: S1. After the Bailey beam 1 and the vertical beam 2 are assembled and fixed, the lifting top support 43 is first welded to the preset position of the Bailey beam 1. Then, the through-hole jack 41 is connected and fixed to the lifting top support 43 through the flange. Then, the steel strand 6 is passed through the inner hole of the through-hole jack 41 and the upper end of the steel strand 6 is initially anchored by the clamp. S2. Install the lifting pump station 42 on the upper part of Bailey beam 1. Connect the PLC controller 7 in the lifting pump station 42 to the pressure sensor of the through-hole jack 41 through the data line. At the same time, establish communication between the PLC controller 7 and the ground control box 10 through the network module 12 to ensure that the real-time information such as the pressure and displacement of the through-hole jack 41 can be transmitted to the ground control box 10. S3. Weld and fix tension supports 31 at both ends of Bailey beam 1. Install sliding axial blocks 32 evenly at the bottom of Bailey beam 1. Pass 930 fine-rolled threaded steel 33 through the sliding axial blocks 32 and connect both ends to tension supports 31. Use hydraulic jacks to tension the fine-rolled threaded steel 33 (the tension control force is executed at 1.05 times the design value). At the same time, weld lifting top supports 52 at the four corners of the intelligent construction integrated platform 5. S4. The lower end of the steel strand 6 is fixedly connected to the lifting support 52 through the anchor. After checking the reliability of the connection of all components, the assembly of the whole system is completed. Then, the PLC controller 7 is operated through the ground control box 10 to drive the through-hole jack 41 to realize the lifting and lowering of the intelligent construction integrated platform 5.

[0037] Compared with the prior art, the beneficial effects of the present invention are: the intelligent construction integrated platform 5 can provide greater load-bearing conditions during construction, increase construction convenience, and clearly understand the operation and stress of various mechanisms during the lifting and lowering process, thus greatly ensuring construction safety.

[0038] Overall structural advantages: By integrating Bailey beam 1, vertical beam 2, auxiliary tensioning components 3, lifting mechanism 4 and intelligent construction integration platform 5, an integrated "tensioning-lifting-monitoring" structure is formed, which solves the problem of the dispersed functions of traditional Bailey beams and provides a stable and integrated support system for the construction of large-span structures. It is suitable for various large-span construction scenarios (such as silo slipform and bridge erection).

[0039] Advantages of auxiliary tensioning components: The tensioning support 31 provides a stable tensioning foundation, the sliding axial block 32 can adaptively displace during the tensioning process to avoid local tensile deformation of Bailey beam 1, and the fine-rolled threaded steel bar 33 transmits tension stress evenly, effectively reducing the risk of stress concentration in Bailey beam 1 and improving the prestressed stability and service life of Bailey beam 1.

[0040] Advantages of 930 precision rolled threaded steel: Compared with ordinary threaded steel (such as HRB400), 930 precision rolled threaded steel has higher tensile strength and better toughness, can withstand greater tension loads, reduce the risk of threaded steel fracture, and further improve the reliability of auxiliary tensioning structures and the load-bearing capacity of Bailey beam 1.

[0041] Advantages of the lifting mechanism: The through-hole jack 41 provides a stable linear lifting force, the lifting pump station 42 provides a continuous and stable power source for the jack, and the lifting top support 43 ensures that the jack is firmly installed. The synergistic effect of the three can avoid the jack tilting or power interruption during the lifting process, ensuring the smooth lifting of the intelligent construction integrated platform 5 and reducing the risk of platform tilting.

[0042] Advantages of the intelligent construction integrated platform: The platform frame 51 has a strong load-bearing capacity, and the lifting top supports 52 at the four corners make the steel strands 6 connected symmetrically. When lifting, the platform is subjected to uniform force, which effectively prevents the platform from overturning or deforming due to uneven force, and provides a safe working platform for construction personnel and equipment.

[0043] Advantages of steel strand connection: The upper and lower ends of the steel strand 6 are reliably connected to the lifting top support 52 and the through-hole jack 41 through anchors, respectively. The force transmission path is clear and stable, avoiding the steel strand 6 from falling off during the lifting process. At the same time, the flexibility of the steel strand 6 can adapt to small displacements, further improving the safety of the lifting process.

[0044] Advantages of monitoring components: The electronic level 8 can monitor the platform's levelness in real time, and can provide timely feedback if tilting exceeds the tolerance (e.g., more than 0.5mm / m); the high-definition camera 9 can monitor the status of key parts of the Bailey beam 1 in real time, making it easier for staff to detect abnormalities such as cracks and deformation in a timely manner, thereby improving the safety of the construction process and the speed of fault response.

[0045] Control system advantages: The PLC controller 7 enables centralized control of the jack, level, and camera, reducing manual operation steps, improving data acquisition accuracy (pressure acquisition error ≤1%) and control response speed (control delay ≤0.5s), and avoiding safety risks caused by human operation errors.

[0046] Advantages of the ground control box: Remote control from the ground is achieved through the network module 12, eliminating the need for workers to operate at heights and reducing the risk of falls from heights; the touch screen 11 intuitively displays various data (such as jack pressure, platform level, and camera images), making it easy for workers to quickly grasp the system status and greatly improving ease of operation.

[0047] Advantages of the lifting method: The steps are logically clear, and the assembly is carried out in the order of "basic structure - lifting components - tensioning components - platform connection", which ensures that each component is installed in an orderly manner and avoids omissions or misassemblies; the coordinated debugging of tensioning and lifting components can identify potential connection problems in advance, improve the assembly efficiency of the whole system (30% higher than the traditional method) and the safety of lifting.

[0048] Bailey beam 1 is located at the top of vertical beam 2. Tensioning support 31 is fixed to both ends of Bailey beam 1. Precision rolled threaded steel bar 33 passes through sliding axial block 32 and is fixed to the lower end of Bailey beam 1. Tensioning the precision rolled threaded steel bar 33 creates a vertical upward stress on the axial support, providing auxiliary conditions for the lifting system set on the large span Bailey beam 1.

[0049] In some embodiments, the lifting system includes a lifting pump station 42, a through-hole jack 41, an upper lifting support 43, steel strands 6, and a lower lifting support 52. The upper lifting support 43 is provided at the upper end of the Bailey beam 1 to fix the through-hole jack 41. The steel strands 6 pass through the through-hole jack 41 to the lifting platform. The lifting platform is provided with the lower lifting support 52. The lifting pump station 42 provides power, forming a safe and efficient lifting system. In some embodiments, there are two Bailey beams 1, located in the 2X direction of four vertical beams, connected to the intelligent construction integration platform 5 via the through-hole jack 41, upper and lower supports, and steel strands 6.

[0050] In some embodiments, there are four tensioning supports 31 arranged at the top of the four vertical beams 2. The 930 precision rolled threaded steel bar 33 passes through the support and is screwed into a nut to fix the hydraulic jack for tensioning. After the tensioning is completed, the nut is rotated to the end of the tensioning support 31.

[0051] In some embodiments, there are eight slidable axial blocks 32 arranged at the lower ends of the two Bailey beams 1. The slidable axial blocks 32 are in contact with the Bailey beams 1 and are fixedly connected by the stress generated by tensioning. During the tensioning process, they can slide and adjust in the X-axis direction according to the stress magnitude.

[0052] In some embodiments, there are four through-hole jacks 41, which are controlled by the lifting pump station 42. Each lifting pump station 42 controls two through-hole jacks 41, and each through-hole jack 41 is connected to the intelligent construction integration platform 5 through upper and lower supports and steel strands 6.

[0053] A silo project requires the use of large-span Bailey beams as slipform construction support. The span of Bailey beam 1 is 30m, the intelligent construction integrated platform 5 has a load-bearing capacity of 50t, and the construction height is 60m.

[0054] Implementation steps: Installation of Bailey beams and vertical beams A 321-type Bailey beam (3m in length per section) is selected and connected by pins to form a 30m span Bailey beam 1. The vertical beam 2 (made of H-beam, model H300×300×10×15) is fixed on the pre-set foundation of the silo. The Bailey beam 1 is connected and fixed to the support plate at the top of the vertical beam 2 by bolts.

[0055] Installation of the lifting mechanism (corresponding to S1) At the predetermined positions on the upper part of Bailey beam 1 (one lifting point every 7.5m, for a total of 4), weld the top support 43 (made of Q355 steel, 20mm thick). Connect the through-hole jack 41 (model: YDC2500, rated tensile force 2500kN) to the top support 43 through the flange. Then, pass the Φ15.24mm steel strand 6 (tensile strength 1860MPa) through the through-hole jack 41 and anchor the upper end of the steel strand 6 with clamps.

[0056] Control system setup (corresponding to S2) A booster pump station 42 (model: ZB4-500, rated pressure 50MPa) is installed on the upper part of Bailey beam 1. The PLC controller 7 (Siemens S7-1200) is connected to the pressure sensor (accuracy 0.2%FS) and displacement sensor (accuracy 0.1mm) of the through-hole jack 41 through shielded wires. At the same time, a network module 12 (model: Huawei AP6050DN) is installed to establish communication with the ground control box 10 (built-in industrial computer). The touch screen 11 is debugged to display the jack pressure and displacement data in real time.

[0057] Installation and tensioning of auxiliary tensioning components (corresponding to S3) Tensioning supports 31 (made of Q355 steel, size 300×200×20mm) are welded at both ends of Bailey beam 1. A sliding axial block 32 (made of wear-resistant cast iron) is installed at every 5m interval at the bottom of Bailey beam 1. Φ32mm 930 precision rolled threaded steel 33 is passed through the sliding axial block 32 and connected to the tensioning support 31 at both ends by nuts. A 200t hydraulic jack is used to tension the precision rolled threaded steel 33. The tensioning control force is 1.05 times (189kN) of the design value (180kN). After tensioning, it is locked with double nuts. At the same time, lifting top supports 52 are welded at the four corners of the intelligent construction integrated platform 5 (platform frame 51 is made of H200×200×8×12 steel, size 6m×6m).

[0058] System assembly and debugging (corresponding to S4) The lower end of the steel strand 6 is fixed to the lifting top support 52 with anchors, and the tightness of all connection points (such as flanges, anchors, nuts) is checked. An electronic level 8 (model: RS232 level) is installed on the platform frame 51, and four high-definition cameras 9 (model: Hikvision DS-2CD3T46DWD-I5) are installed at both ends and the middle span of the Bailey beam 1. The PLC controller 7 is operated through the ground control box 10 to drive the through-hole jack 41 for trial lifting (lifting height 100mm), and the platform levelness (error ≤0.3mm / m) and jack pressure (stable at 125kN / jack) are monitored. After confirming that there are no abnormalities, the system assembly is completed and it can be put into formal lifting operation.

[0059] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A long-span prestressed Bailey beam, characterized in that: It includes a Bailey beam (1), a vertical beam (2), an auxiliary tensioning member (3), a lifting mechanism (4), and an intelligent construction integration platform (5); the Bailey beam (1) is installed on the vertical beam (2), the Bailey beam (1) is equipped with the auxiliary tensioning member (3), the lifting mechanism (4) is installed on the upper part of the Bailey beam (1), and the lifting mechanism (4) is connected to the intelligent construction integration platform (5) through steel strands (6).

2. The large-span prestressed Bailey beam as described in claim 1, characterized in that: The auxiliary tensioning component (3) includes a tensioning support (31), a sliding axial block (32), and a precision-rolled threaded steel bar (33). The tensioning support (31) is installed at both ends of the Bailey beam (1). Several sliding axial blocks (32) are installed at the lower part of the Bailey beam (1) and placed at the lower part of the lifting mechanism (4). The two ends of the precision-rolled threaded steel bar (33) are connected to the tensioning support (31), and the middle position of the precision-rolled threaded steel bar (33) passes through the sliding axial block (32).

3. A large-span prestressed Bailey beam as described in claim 1, characterized in that: The precision-rolled threaded steel (33) is made of 930 precision-rolled threaded steel.

4. A large-span prestressed Bailey beam as described in claim 1, characterized in that: The lifting mechanism (4) includes a through-hole jack (41), a lifting pump station (42), and a lifting top support (43). The lifting pump station (42) is installed on the upper part of the Bailey beam (1). The through-hole jack (41) is installed on the Bailey beam (1) through the lifting top support (43). The lifting pump station (42) provides a power source for the through-hole jack (41).

5. A large-span prestressed Bailey beam as described in claim 1, characterized in that: The intelligent construction integration platform (5) includes a platform frame (51) and lifting top supports (52), and lifting top supports (52) are installed on all four corners of the platform frame (51).

6. A large-span prestressed Bailey beam as described in claim 1, characterized in that: The lower end of the steel strand (6) is connected to the lower support (52) of the lifting top, and the upper end of the steel strand (6) passes through the upper support (43) of the lifting top and is connected to the through-hole jack (41).

7. A large-span prestressed Bailey beam as described in claim 5, characterized in that: An electronic level (8) is installed on the platform frame (51), and several high-definition cameras (9) are installed on the Bailey beam (1).

8. A large-span prestressed Bailey beam as described in claim 4, characterized in that: The booster pump station (42) is equipped with a PLC controller (7), which is electrically connected to the through-hole jack (41), the electronic level (8) and the high-definition camera (9).

9. A large-span prestressed Bailey beam as described in claim 8, characterized in that: The PLC controller (7) is connected to the ground control box (10) via a network module (12), and the ground control box (10) is connected to a touch screen (11).

10. A method for raising and lowering a large-span prestressed Bailey beam as described in any one of claims 1-9, characterized in that: The method and steps are as follows: S1. After the Bailey beam (1) is installed at the silo, install the lifting top support (43), then install the through jack (41), and then install the steel strand (6) through the through jack (41). S2. Then install the lifting pump station (42). The lifting pump station (42) is equipped with a PLC controller (7). It is connected to the through-hole jack (41) by a data cable. The real-time information of the through-hole jack (41) is transmitted to the ground control box (10) through the network module (12). S3. Install tensioning support (31) and sliding axial block (32), insert fine rolled threaded steel (33), connect hydraulic jack for tensioning, and at the same time install lifting support (52) on intelligent construction integrated platform (5). S4, steel strand (6) connects to the intelligent construction integration platform (5) to complete the assembly of the entire system.

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