Heavy steel truss and large diameter aluminum alloy lattice shell structure integral lifting device and method

Abstract

The present invention relates to the field of construction engineering technology, and specifically to an overall lifting device and method for a heavy steel truss and a large-diameter aluminum alloy lattice shell structure, comprising the following steps: arranging lifting points and monitoring points; installing lifting equipment facilities and temporary measures of brackets and hoists for a multi-story steel truss structure, assembling the floor steel frame at low altitude on the ground, and installing a lifting device; debugging the lifting equipment as a whole, lifting the lattice shell structure off the ground; lifting the lattice shell structure to near the original design position; slowly lifting the lattice shell structure to the design position of the truss structure; installing the remaining supplementary rods to connect, testing their welding quality, and performing graded synchronous unloading after passing the quality inspection, and the lifting is completed. The heavy steel truss is lifted after being assembled into a whole on the ground platform, which is conducive to ensuring the overall assembly of the heavy truss and avoiding the problem of difficulty in high-altitude assembly and positioning, thereby ensuring the accurate positioning of the steel components of the truss and improving construction efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of building engineering, and in particular to a device and method for integrally lifting a heavy steel truss and a large-diameter aluminum alloy lattice shell structure. Background Art

[0002] With the growing prosperity of the domestic science and technology industry, the science and technology venues in my country follow the footsteps of "science and technology". In terms of architectural design, they are full of ingenuity and thoughtfulness. In terms of architecture, the unique architectural appearance highlights the novelty and technological sense of "future technology". In order to make the aluminum alloy lattice shell structure reflect a strong sense of the times and technology, the large-scale "cross steel truss" and "large-diameter aluminum alloy lattice shell structure" are connected through low-altitude assembly. However, there is no suitable lifting device and method in the existing technology to lift the "cross steel truss" and "large-diameter aluminum alloy lattice shell structure" as a whole. Therefore, it is particularly important to design a device and method for lifting the heavy steel truss and large-diameter aluminum alloy lattice shell structure as a whole. Summary of the invention

[0003] In order to solve the problem that there is no suitable lifting method for the cross steel truss and the large-diameter aluminum alloy lattice shell structure assembled and connected at low altitude, the present invention provides a heavy steel truss and a large-diameter aluminum alloy lattice shell structure as a whole lifting device and method, through which the cross steel truss and the large-diameter aluminum alloy lattice shell structure assembled and connected at low altitude can be lifted as a whole, reducing high-altitude operations and improving the lifting efficiency.

[0004] In order to achieve the above object, the technical solution of the present invention is:

[0005] The overall lifting method of the heavy steel truss and the large-diameter aluminum alloy lattice shell structure includes the following steps:

[0006] Step 1: Arrangement of lifting points: Use a large-diameter aluminum alloy lattice shell structure as the core tube to divide it into multiple layers, and set lifting points on the inner and outer walls of each layer of the core tube;

[0007] Step 2: Monitoring point arrangement: arrange stress sensors and static level to monitor cross trusses and multi-layer steel trusses;

[0008] Step 3: Overall improvement: Specifically:

[0009] Step 3.1: Install the multi-story floor steel truss structure lifting equipment and facilities and temporary measures for brackets and hoists, assemble the floor steel frame at low altitude on the ground, and install the lower hoist, lower hoist reinforcement rods and lifting brackets;

[0010] Step 3.2: After debugging the lifting equipment as a whole and confirming that it is correct, lift the lattice shell structure off the ground;

[0011] Step 3.3: Perform normal lifting operation, lift the lattice shell structure to the vicinity of the original design position, make fine adjustments to each lifting point, and slow down the lifting speed;

[0012] Step 3.4: Slowly lift the lattice shell structure to the designed position of the truss structure, lock the hydraulic lifter, and re-measure the lifting height of each lifting point to ensure that the design requirements are met;

[0013] Step 3.5: Install the remaining subsequent rod connections, check their welding quality, and after passing the quality inspection, perform graded synchronous unloading to complete the lifting.

[0014] Furthermore, in the step 1, the five-layer structure heavy steel trusses and the large-diameter aluminum alloy lattice shell are hoisted as a whole, a total of 48 hoisting points are set, and the lifting brackets are set using reinforced concrete columns to arrange the lifting points.

[0015] Furthermore, in step 2, a total of 89 stress sensors and 23 sets of static levels are arranged to conduct all-round health monitoring of the cross trusses and five-layer steel trusses, monitor the stress status in real time, and ensure that the stress and strain remain within a reliable range.

[0016] Furthermore, in step 3.2, the lattice shell structure is loaded with 20%, 40%, 60%, 80% and 100% in sequence to be about 100 mm off the ground. When the lifting amount of one point is different from that of other points, "single point" fine-tuning is performed and the loading is stopped for 24 hours.

[0017] Furthermore, the "single point" fine-tuning process ensures that the height difference of the lifting points is within 20 mm, ensures the synchronization of each lifting point, and ensures the smooth flow of the lifting channel during the lifting process.

[0018] Furthermore, before the formal lifting operation in step 3.3, confirm that all aspects are operating normally, and measure the lifting height of each lifting point every 2m during the lifting process to ensure that the lifting height difference between each lifting point is within the allowable range and ensure that the steel truss tends to be horizontal during lifting.

[0019] Furthermore, the step 3.5 described in the step of synchronous unloading is that the hydraulic lifter is lifted to 20%, 40%, 60%, and 80% in sequence. After confirming that there is no abnormality in each part, the unloading can continue to 100%. The structural load is completely transferred to the foundation, and the structural stress form is converted into the design condition synchronous step unloading. The truss structure load is transferred to the steel column structure and transmitted to the core tube.

[0020] In order to ensure the safety of working conditions, the finite element model of the structure was established using the finite element software ABAQUS, and the entire construction process of the five-story heavy floor trusses, cross trusses and aluminum alloy spheres was simulated and analyzed. The finite element analysis software was used for hoisting, and comprehensive calculations were performed during the construction and lifting stages. After the completion of the aluminum alloy single-layer lattice shell structure, temporary support structure removal analysis and stability issues related to the overall lifting of the five-story steel trusses and cross trusses were ensured.

[0021] The heavy steel truss and large diameter aluminum alloy lattice shell structure integral lifting device comprises a steel truss, columns are arranged at both ends of the steel truss, a lifting beam is arranged on the columns, a diagonal brace is arranged below the lifting beam, a lifter is arranged on the lifting beam, a guide frame is arranged on one side of the lifter, the guide frame is fixed on the lifting beam, and a lower sling is arranged on the steel truss corresponding to the lower part of the lifter. The steel truss is lifted by the cooperation of the lifter and the lower sling, and the lifter ensures that the lifting direction is on the lifting center line to ensure the stability of the lifting.

[0022] Furthermore, the lifting beam is located inside the concrete layer for the 200t lifting frame, and the lifting beam is located inside the concrete layer and the steel truss below the corresponding lower sling is provided with a rear-mounted rod for the 350t lifting frame. The rear-mounted rod is installed after the steel truss is lifted, making the internal structure of the steel truss more stable.

[0023] Furthermore, the lifting beam is located above the concrete layer, a rear tie rod is provided on one side of the column, and the rear tie rod is connected to a support frame; a web is provided in the steel truss corresponding to the lower hanger, and a reinforcing rod is provided on the web, and the reinforcing rod connects the web and the steel truss below the lower hanger, and a rear-mounted rod is connected to the web, and the lifting frame is a 500t lifting frame. Since the 500t lifting frame is installed on the top of the column, the rear tie rod makes the lifting frame more stable, and the reinforcing rod increases the stability of the steel truss during the lifting process.

[0024] Through the above technical solution, the beneficial effects of the present invention are:

[0025] The present invention expands and combines the lifting device, and the weight, span and area of ​​the steel truss lifted as a whole are not limited; flexible rigging is used to bear the weight, and the lifting height is not limited as long as there are reasonable load-bearing hanging points; the heavy steel truss is lifted after being assembled into a whole on the ground platform, which is conducive to ensuring the overall assembly of the heavy truss and avoiding the problem of difficult positioning of high-altitude assembly, thereby ensuring the accurate positioning of the steel components of the truss and improving construction efficiency; the lifting device has a high degree of automation, convenient and flexible operation, good safety, high reliability, wide application and strong versatility; the overall lifting is completed by assembling on a low-altitude platform, so the high-altitude operation is greatly reduced, the lifting process time is short, and the construction period can be guaranteed; sensors and static levels are arranged on the heavy steel truss and the aluminum alloy single-layer lattice shell structure, and their strain and displacement are monitored in all-round real-time health, ensuring the safety and reliability of the overall lifting and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a lifting point arrangement diagram of the overall lifting method of the heavy steel truss and the large-diameter aluminum alloy lattice shell structure of the present invention;

[0027] Figure 2 It is a stress sensor arrangement diagram of the overall lifting method of the heavy steel truss and large diameter aluminum alloy lattice shell structure of the present invention;

[0028] Figure 3 It is a static level arrangement diagram of the overall lifting method of the heavy steel truss and large diameter aluminum alloy lattice shell structure of the present invention;

[0029] Figure 4 It is a structural schematic diagram of the lifting equipment and support of the method for integrally lifting a heavy steel truss and a large-diameter aluminum alloy lattice shell structure of the present invention;

[0030] Figure 5 It is a schematic diagram of the overall lifting and debugging of the synchronous system of the overall lifting method of the heavy steel truss and the large-diameter aluminum alloy lattice shell structure of the present invention;

[0031] Figure 6 It is a formal overall lifting construction schematic diagram of the overall lifting method of the heavy steel truss and large-diameter aluminum alloy lattice shell structure of the present invention;

[0032] Figure 7 It is a schematic diagram of the lifting design position of the overall lifting method of the heavy steel truss and the large-diameter aluminum alloy lattice shell structure of the present invention;

[0033] Figure 8 It is a structural schematic diagram of a 200t lifting frame of the heavy steel truss and large-diameter aluminum alloy lattice shell structure integral lifting device of the present invention;

[0034] Fig. 9 It is a structural schematic diagram of a 350t lifting frame of the present invention's heavy steel truss and large-diameter aluminum alloy lattice shell structure integral lifting device;

[0035] Fig.10 It is a structural schematic diagram of a 500t lifting frame of the present invention's heavy steel truss and large-diameter aluminum alloy lattice shell structure integral lifting device.

[0036] The numbers in the attached drawings are: 1 is a steel truss, 2 is a rear-mounted rod, 3 is a column, 4 is a lifting beam, 5 is a guide frame, 6 is a lifter, 7 is a lower hanger, 8 is a lifting center line, 9 is a diagonal brace, 10 is a rear pull rod, 11 is a web, 12 is a reinforcing rod, and 13 is a support frame. DETAILED DESCRIPTION

[0037] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0038] The overall lifting method of the heavy steel truss and the large-diameter aluminum alloy lattice shell structure includes the following steps:

[0039] like Figure 1 As shown, step 1: arrangement of lifting points: using a large-diameter aluminum alloy lattice shell structure as the core tube to divide the multiple layers, the five-layer structure heavy steel truss and the large-diameter aluminum alloy lattice shell are lifted as a whole, the diameter of the large-diameter aluminum alloy lattice shell is less than 32 meters, and lifting points are set on the inner and outer walls of each layer of the core tube, with a total of 48 lifting points. Lifting brackets are set using reinforced concrete columns, and lifting points are arranged. In this embodiment, the total lifting amount is about 6,000 tons, the cross truss connected to the aluminum alloy lattice shell has a span of 76 meters, and the lifting area is about 11,000 square meters. The lifting points are arranged on the upper chord position of the reserved truss structure outside the inner five layers of the four core tube areas, and hydraulic lifters are installed, including 8 500t types, 8 350t types, 22 200t types, and 10 60t types, totaling 48 lifting points, and a lifting of about 11,800 tons.

[0040] In this stage, 8 lifting points including 6, 7, 18, 19, 30, 31, 42 and 43 use TJJ-5000 type 500t hydraulic lifter, 8 lifting points including 1, 12, 13, 24, 25, 36, 37 and 48 use TJJ-3500 type 350t hydraulic lifter, 10 lifting points including 5, 8, 17, 20, 23, 26, 29, 32, 41 and 44 use TJJ-600 type 60t hydraulic lifter, and the remaining 22 lifting points are equipped with TJJ-2000 type 200t hydraulic lifter.

[0041] like Figure 2 and Figure 3As shown, step 2: monitoring point arrangement: arrange stress sensors and static levels to monitor the cross trusses and five-layer steel trusses. A total of 89 stress sensors and 23 sets of static levels are arranged to conduct all-round health monitoring of the cross trusses and five-layer steel trusses, monitor the stress status in real time, and ensure that the stress and strain remain within a reliable range;

[0042] Step 3: Overall improvement: Specifically:

[0043] like Figure 4 As shown, step 3.1: install the five-story floor steel truss structure lifting equipment facilities and brackets, temporary measures for lifting equipment, assemble the floor steel frame at low altitude on the ground, and install the lower lifting equipment, lower lifting equipment reinforcement rods and lifting brackets;

[0044] like Figure 5 As shown, step 3.2: debug the hydraulic lifter, hydraulic pump source and synchronous control system as a whole. After confirming that they are correct, lift the lattice shell structure off the ground, and load it by 20%, 40%, 60%, 80% and 100% in sequence to make the lattice shell structure about 100mm off the ground. When the lifting amount of one point is different from that of other points, perform "single point" fine-tuning and stay for 24 hours;

[0045] like Figure 6 As shown, step 3.3: Before the formal lifting operation, confirm that all aspects are operating normally; during the formal lifting operation, measure the lifting height of each lifting point every 2m during the lifting, and make "single point" fine-tuning to ensure that the height difference of the lifting point is within 20mm, ensure that each lifting point is synchronized, and ensure that the lifting channel is unobstructed during the lifting process; for normal lifting operations, lift the lattice shell structure to the vicinity of the original design position, make fine-tuning treatments on each lifting point, and slow down the lifting speed.

[0046] like Figure 7 As shown, step 3.4: slowly lift the lattice shell structure to the designed position of the truss structure, lock the hydraulic lifter, and re-measure the lifting height of each lifting point to ensure that the design requirements are met;

[0047] like Figure 7 As shown, step 3.5: install the remaining supplementary rod connections, test their welding quality, and perform graded synchronous unloading after passing the quality inspection. The hydraulic lifter is increased to 20%, 40%, 60%, and 80% in sequence. After confirming that there are no abnormalities in each part, it can continue to unload to 100%. The structural load is completely transferred to the foundation, and the structural force form is converted to the design condition for synchronous graded unloading. The truss structure load is transferred to the steel column structure and transmitted to the core tube, and the lifting is completed.

[0048] like Figure 8 to Figure 10As shown, the overall lifting device of heavy steel truss and large diameter aluminum alloy lattice shell structure comprises a steel truss 1, wherein both ends of the steel truss 1 are provided with columns 3, and a lifting beam 4 is provided on the columns 3, and a diagonal brace 9 is provided below the lifting beam 4, and a lifter 6 is provided on the lifting beam 4, and a guide frame 5 is provided on one side of the lifter 6, and the guide frame 5 is fixed on the lifting beam 4, and a lower sling 7 is provided on the steel truss 1 corresponding to the lower part of the lifter 6. The lifter 6 is connected with the lower sling 7, and the steel truss 1 is gradually lifted through the extension and contraction process of the lifter 6, and the steel truss 1 drags the lattice shell structure to be lifted, and the steel truss 1 is lifted along the lifting center line 8 through the guidance of the guide frame 5, and the steel truss 1 is lifted to the specified position, thereby lifting the lattice shell structure to the specified position.

[0049] The lifting frame in which the lifting beam 4 is located inside the concrete layer is a 200t lifting frame; the lifting frame in which the lifting beam 4 is located inside the concrete layer and a rear-mounted rod 2 is provided in the steel truss 1 corresponding to the lower hanger 7 is a 350t lifting frame. The lifting beam 4 is located above the concrete layer, and a rear tie rod 10 is provided on one side of the column 3, and the rear tie rod 10 is connected to a support frame 13; a web 11 is provided in the steel truss 1 corresponding to the lower hanger 7, and a reinforcing rod 12 is provided on the web 11, and the reinforcing rod 12 connects the web 11 and the steel truss 1 below the lower hanger 7, and the rear-mounted rod 2 is connected to the web 11. This lifting frame is a 500t lifting frame. After the steel truss 1 is lifted to the specified position, the reinforcing rod 12 is removed, the butt welding is performed, and the rear-mounted rod 2 is installed to complete the lifting work.

[0050] When in use, the lifter 6 is connected to the lower sling 7, and the steel truss 1 is gradually lifted through the extension and retraction process of the lifter 6. The steel truss 1 drags the lattice shell structure to be lifted, and the guide frame 5 is used to guide the steel truss 1 to be lifted along the lifting center line 8, and the steel truss 1 is lifted to the specified position, thereby lifting the lattice shell structure to the specified position, and finally the reinforcing rod 12 is removed, and the butt welding is performed and the rear mounted rod 2 is installed to complete the lifting work.

[0051] The embodiments described above are only preferred embodiments of the invention and are not intended to limit the scope of implementation of the invention. Therefore, any equivalent changes or modifications made according to the technical solutions described in the patent scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. The overall lifting method of heavy steel trusses and large-diameter aluminum alloy lattice shell structures is characterized by: The following steps are involved: Step 1: Arrangement of lifting points: Use a large-diameter aluminum alloy lattice shell structure as the core tube to divide it into multiple layers, and set lifting points on the inner and outer walls of each layer of the core tube; Step 2: Monitoring point arrangement: arrange stress sensors and static level to monitor cross trusses and multi-layer steel trusses; Step 3: Overall improvement: Specifically: Step 3.1: Install the multi-story floor steel truss structure lifting equipment and facilities and temporary measures for brackets and hoists, assemble the floor steel frame at low altitude on the ground, and install the lower hoist, lower hoist reinforcement rods and lifting brackets; Step 3.2: After debugging the lifting equipment as a whole and confirming that it is correct, lift the lattice shell structure off the ground; Step 3.3: Perform normal lifting operation, lift the lattice shell structure to the vicinity of the original design position, make fine adjustments to each lifting point, and slow down the lifting speed; Step 3.4: Slowly lift the lattice shell structure to the designed position of the truss structure, lock the hydraulic lifter, and re-measure the lifting height of each lifting point to ensure that the design requirements are met; Step 3.5: Install the remaining supplementary rods and connect them, and check their welding quality. After the quality inspection is qualified, carry out graded synchronous unloading, and the lifting is completed; The method for integrally lifting a heavy steel truss and a large-diameter aluminum alloy lattice shell structure adopts an integral lifting device for a heavy steel truss and a large-diameter aluminum alloy lattice shell structure, the device comprising a steel truss (1), both ends of the steel truss (1) are provided with columns (3), a lifting beam (4) is provided on the columns (3), a diagonal brace (9) is provided below the lifting beam (4), a lifter (6) is provided on the lifting beam (4), a guide frame (5) is provided on one side of the lifter (6), the guide frame (5) is fixed on the lifting beam (4), and a lower sling (7) is provided on the steel truss (1) corresponding to the lower side of the lifter (6); The lifting beam (4) located inside the concrete layer is a 200t lifting frame; The lifting beam (4) is located on the inner side of the concrete layer and the rear-mounted rod (2) is provided in the steel truss (1) below the corresponding lower sling (7), which is a 350t lifting frame; The lifting beam (4) is located above the concrete layer, a rear tie rod (10) is provided on one side of the column (3), and the rear tie rod (10) is connected to a support frame (13); A web (11) is provided in the steel truss (1) at a position corresponding to the lower sling (7), a reinforcing rod (12) is provided on the web (11), the reinforcing rod (12) connects the web (11) and the steel truss (1) below the lower sling (7), a rear-mounted rod (2) is connected to the web (11), and the lifting frame is a 500t lifting frame.

2. The method for integrally lifting a heavy steel truss and a large-diameter aluminum alloy lattice shell structure according to claim 1 is characterized in that: In the step 1, the five-layer heavy steel trusses and the large-diameter aluminum alloy lattice shell are hoisted as a whole, a total of 48 hoisting points are set, and the lifting brackets are set using reinforced concrete columns to arrange the lifting points.

3. The method for integrally lifting a heavy steel truss and a large-diameter aluminum alloy lattice shell structure according to claim 1 is characterized in that: In step 2, a total of 89 stress sensors and 23 sets of static levels are arranged to perform all-round health monitoring of the cross trusses and multi-layer steel trusses.

4. The method for integrally lifting a heavy steel truss and a large-diameter aluminum alloy lattice shell structure according to claim 1 is characterized in that: In step 3.2, the lattice shell structure is loaded with 20%, 40%, 60%, 80% and 100% in sequence to be 100 mm off the ground. When the lifting amount of one point is different from that of other points, "single point" fine adjustment is performed and the structure is kept for 24 hours.

5. The method for integrally lifting a heavy steel truss and a large-diameter aluminum alloy lattice shell structure according to claim 4 is characterized in that: The "single point" fine-tuning process ensures that the height difference of the lifting point is within 20 mm.

6. The method for integrally lifting a heavy steel truss and a large-diameter aluminum alloy lattice shell structure according to claim 1 is characterized in that: Before the formal lifting operation in step 3.3, confirm that all aspects are operating normally, and measure the lifting height of each lifting point every 2m during the lifting process.

7. The method for integrally lifting a heavy steel truss and a large-diameter aluminum alloy lattice shell structure according to claim 1 is characterized in that: The step 3.5 described in the step of synchronous unloading is that the hydraulic lifter is unloaded to 20%, 40%, 60%, and 80% in sequence. After confirming that there is no abnormality in each part, it can continue to unload to 100%. The structural load is completely transferred to the foundation, and the structural stress form is converted to the design condition for synchronous step unloading. The truss structure load is transferred to the steel column structure and transmitted to the core tube.

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