Integral cumulative lifting construction method for large-span complex net rack in-situ non-uniform points

Abstract

The application discloses a construction method for integral cumulative lifting of large-span complex net racks at non-uniform points in situ, which comprises the following steps: assembling large-span complex net racks and trusses on the ground; using lifting devices to perform integral cumulative lifting of the roof at non-uniform points; using the trusses as temporary lifting points before the first lifting; installing the first lifting device on the first steel column; lifting the large-span complex net racks to the same elevation of the trusses for rod connection after the first lifting; removing the temporary lifting device arranged on the truss; arranging a large-tonnage jack group on the second steel column at the middle position of the truss; using the lifting point arranged on the first steel column to perform the second lifting of the integral roof to the design elevation; embedding the rod after the lifting; and unloading the roof after the embedding to complete the conversion of the stress state of the structure system. The application solves the problem of the large number of temporary measures in the conventional construction method of the large-span net racks.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a method for in-situ, non-uniformly distributed point-based cumulative lifting construction of large-span complex space frames. Background Technology

[0002] With advancements in materials and computational methods, space frame structures are becoming increasingly larger and heavier. The conventional construction method for space frame structures involves assembling the frame in situ on the ground, then setting up numerous temporary supports based on calculations to house lifting devices, and finally lifting the entire frame. This method relies heavily on temporary measures, and the subsequent dismantling of these temporary measures also requires significant machinery and labor, increasing the risks associated with working at heights. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, a method for in-situ, non-uniformly distributed point overall cumulative lifting construction of large-span complex space frames is provided to solve the problem of excessive use of temporary measures in conventional construction methods for large-span space frames.

[0004] To achieve the above objectives, a method for in-situ, non-uniformly distributed point overall cumulative lifting construction of a large-span complex space frame is provided. The large-span complex space frame has a first side and a second side, with a truss installed on the first side. The method for in-situ, non-uniformly distributed point overall cumulative lifting construction of a large-span complex space frame includes the following steps:

[0005] The large-span complex space frame and the truss were assembled in situ on the ground, respectively.

[0006] Multiple first steel columns are installed on the second side of the large-span complex space frame, and the multiple first steel columns are evenly distributed along the length direction of the second side of the large-span complex space frame;

[0007] A first lifting device is installed on the truss and the first steel column. Multiple first lifting devices on the truss are evenly distributed along the length direction of the first side of the large-span complex space frame. The slings of the first lifting devices on the truss and the first steel column are respectively connected to the first side and the second side of the large-span complex space frame.

[0008] The large-span complex space frame is lifted for the first time using the first lifting device, so that the large-span complex space frame is in the designed position and left to stand still for a period of time.

[0009] The large-span complex space frame is lifted by the first lifting device, so that the first side of the large-span complex space frame is positioned opposite to the truss;

[0010] The first side of the large-span complex space frame is connected to the truss by a connecting rod, and the first lifting device on the truss is removed.

[0011] Second steel columns are installed at both ends and the middle of the truss installation location, respectively;

[0012] A plurality of second lifting devices are installed on the second steel column, and the slings of the plurality of second lifting devices are connected to the truss.

[0013] The large-span complex space frame and the truss are lifted a second time using the second lifting device and the remaining first lifting device, so that the large-span complex space frame and the truss are in the designed posture and left to stand still for a period of time.

[0014] The large-span complex space frame and the truss are lifted to the design elevation by the second lifting device and the remaining first lifting device, and edge sealing members are installed between the second side of the large-span complex space frame and the first steel column, and the truss is installed on the second steel column.

[0015] Furthermore, the truss includes two truss segments arranged in the same direction, and the second steel column is located at the end of the truss segment. After the truss segment is raised to the design elevation, a post-installed member is connected between the two truss segments and installed on the second steel column.

[0016] Furthermore, the height of the first and second trial lifts is 100mm.

[0017] Furthermore, the settling time after the first and second trial lifts is 2 to 24 hours.

[0018] Furthermore, when dismantling the first lifting device on the truss, the first lifting devices on the first steel columns at both ends and in the middle of the second side of the large-span complex space frame are also dismantled.

[0019] The beneficial effects of this invention are as follows: The in-situ non-uniformly distributed point overall cumulative lifting construction method for large-span complex space frames involves assembling the large-span complex space frame and truss on the ground, followed by using a lifting device to perform a non-uniformly distributed point overall cumulative lifting operation of the roof. No temporary supports are set on the large-span complex space frame, and the lifting is performed in two cumulative stages. This method uses fewer temporary measures, and the subsequent removal of these temporary measures requires only a small amount of machinery and labor, reducing the risks of high-altitude operations. Specifically, before the first lifting, the truss is used as a temporary lifting point, and a first lifting device is installed on the first steel column. After the lifting device is ready, the first lifting is performed, raising the large-span complex space frame to the same elevation as the truss for reinforcement connection. Then, the temporary lifting device on the truss is removed. Next, a group of large-tonnage jacks (i.e., multiple second lifting devices) is set on the second steel column in the middle of the truss, and the lifting point on the first steel column is used for the second overall lifting of the roof to the design elevation. After lifting and positioning, the reinforcement members are installed. After installation, the entire roof is unloaded, completing the transformation of the structural system's stress state. Attached Figure Description

[0020] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0021] Figures 1 to 5 This is a schematic diagram illustrating the steps of the in-situ non-uniformly distributed point overall cumulative lifting construction method for large-span complex space frames according to an embodiment of the present invention.

[0022] Figure 6 This is a schematic diagram of the layout of the first lifting device according to an embodiment of the present invention.

[0023] Figure 7 This is a schematic diagram of the layout of the second lifting device according to an embodiment of the present invention. Detailed Implementation

[0024] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] Reference Figures 1 to 7As shown, this invention provides a method for in-situ, non-uniformly distributed point overall cumulative lifting construction of a large-span complex space frame, wherein the large-span complex space frame 1 has a first side and a second side. A truss 2 is provided on the first side of the large-span complex space frame 1.

[0027] Specifically, the in-situ non-uniformly distributed point overall cumulative lifting construction method for large-span complex space frame 1 includes the following steps:

[0028] S1, see reference Figure 1 The large-span complex space frame 1 and truss 2 were assembled in situ on the ground.

[0029] S2, see further. Figure 1 and combined Figure 6 As shown, multiple first steel columns 3 are installed on the second side of the large-span complex space frame 1, and the multiple first steel columns 3 are evenly distributed along the length direction of the second side of the large-span complex space frame 1.

[0030] S3, Continue reading Figure 1 and combined Figure 6 As shown, a first lifting device 4 is installed on the truss 2 and the first steel column 3. Multiple first lifting devices 4 on the truss 2 are evenly distributed along the length direction of the first side of the large-span complex space frame 1, and the slings 41 of the first lifting devices 4 on the truss 2 and the first steel column 3 are respectively connected to the first side and the second side of the large-span complex space frame 1.

[0031] S4. The large-span complex space frame 1 is lifted for the first time by the first lifting device 4, so that the large-span complex space frame 1 is in the design posture and left to stand still for a period of time.

[0032] The initial lifting height is 100mm. The settling time after the initial lifting is 2–24 hours.

[0033] S5. The large-span complex space frame 1 is lifted by the first lifting device 4, so that the first side of the large-span complex space frame 1 is set opposite to the truss 2.

[0034] S6, see reference Figure 2 As shown, the first side of the large-span complex space frame 1 is connected to the truss 2 by a connecting rod, and the first lifting device 4 on the truss 2 is removed.

[0035] When dismantling the first lifting device 4 on the truss 2, the first lifting device 4 on the first steel column 3 at both ends and in the middle of the second side of the large-span complex space frame 1 is also dismantled.

[0036] S7, see reference Figure 3 and combined Figure 7 As shown, second steel columns 5 are installed at both ends and the middle of the installation position of truss 2.

[0037] S8, see further. Figure 3 and combined Figure 7 As shown, multiple second lifting devices 6 are installed on the second steel column 5, and the slings of the multiple second lifting devices 6 are connected to the truss 2.

[0038] S9. The large-span complex space frame 1 and truss 2 are lifted for the second time by the second lifting device 6 and the remaining first lifting device 4, so that the large-span complex space frame 1 and truss 2 are in the design posture and left to stand still for a period of time.

[0039] The second lift was 100mm high. The settling time after the second lift was 2–24 hours.

[0040] S10, see reference Figure 4 and Figure 5 As shown, the large-span complex space frame 1 and truss 2 are lifted to the design elevation by the second lifting device 6 and the remaining first lifting device 4, and the edge sealing member 11 is installed between the second side of the large-span complex space frame 1 and the first steel column 3, and the truss 2 is installed on the second steel column 5.

[0041] See Figure 6 and Figure 7 As shown, truss 2 includes two truss segments 21 arranged in the same direction. A second steel column 5 is located at the end of the truss segment 21. After the truss segment 21 is raised to the design elevation, a post-installed member is connected between the two truss segments 21 and installed on the second steel column 5.

[0042] The present invention discloses an in-situ, non-uniformly distributed, integral cumulative lifting construction method for large-span complex space frames. The large-span complex space frame 1 and truss 2 are assembled on the ground at an elevation of -1.000m. Simultaneously, a first lifting device (i.e., a hydraulic synchronous lifting system) is installed at the top of the first steel column and the top of the truss. The first lifting devices D03-D29 and D32-D33 are located on the second side of the large-span complex space frame; the first lifting devices L01-L17 are located on the first side of the large-span complex space frame, serving as temporary lifting points. Temporary measures such as temporary balls and temporary rods are installed at the lower chord of the large-span complex space frame corresponding to the upper lifting points to lift the lower lifting points.

[0043] Debug the hydraulic system of the first lifting device, lift it about 100mm, then stop lifting, finely adjust the elevation of each lifting point of the large-span complex space frame to make it in the design posture, measure and record the maximum deformation at the mid-span of the large-span complex space frame, and let it stand for 2 to 24 hours.

[0044] After the trial lifting of the large-span complex space frame proceeded without any issues, the first lifting device lowered the large-span complex space frame to 3 meters and then paused the lifting. The large-span complex space frame and the truss were then connected into a whole using connecting rods.

[0045] Remove the first lifting device (D04, D05, D15 to D17, D27, D28) on the truss, and use the second steel column and other structures installed on the truss to set up a second lifting device (D01, D02, D30, D31, D34, D35) as a second lifting platform. Each lifting platform is equipped with 1 to 8 XY-TS hydraulic lifters.

[0046] Next, test the hydraulic systems of the second lifting device and the remaining first lifting device. After lifting for about 100mm, stop lifting, fine-tune the elevation of each lifting point of the large-span complex space frame and truss to bring it into the design position, measure and record the maximum deformation at the mid-span of the large-span complex space frame and truss, and let it stand for 2 to 24 hours.

[0047] After confirming that the trial lift was successful, the lifting of the large-span complex space frame and truss was suspended at the designed elevation, and the edge sealing members were installed.

[0048] Finally, the temporary measures were removed, and the post-installed poles were installed to complete the roof truss installation.

[0049] The present invention discloses an in-situ, non-uniformly distributed point overall cumulative lifting construction method for large-span complex space frames. The large-span complex space frame and truss are assembled on the ground, and then a lifting device is used to perform a non-uniformly distributed point overall cumulative lifting operation of the roof. No temporary supports are set on the large-span complex space frame. The lifting is performed in two cumulative stages. The method of the present invention uses fewer temporary measures, and the subsequent removal of temporary measures requires only a small amount of machinery and labor, reducing the risk of high-altitude operations. Specifically, before the first lifting, the truss is used as a temporary lifting point, and a first lifting device is installed on the first steel column. After the lifting device is ready, the first lifting is performed, raising the large-span complex space frame to the same elevation as the truss for reinforcement connection. Then, the temporary lifting device on the truss is removed. Next, a group of large-tonnage jacks (i.e., multiple second lifting devices) is set on the second steel column in the middle of the truss, and the lifting point on the first steel column is used for the second overall lifting of the roof to the design elevation. After lifting and positioning, the reinforcement members are installed. After the installation is completed, the entire roof is unloaded, completing the transformation of the structural system's stress state.

[0050] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A method for in-situ, non-uniformly distributed point-based, cumulative lifting construction of large-span complex space frames, characterized in that: The large-span complex space frame has a first side and a second side, with a truss installed on the first side. The in-situ non-uniformly distributed point overall cumulative lifting construction method for the large-span complex space frame includes the following steps: The large-span complex space frame and the truss were assembled in situ on the ground, respectively. Multiple first steel columns are installed on the second side of the large-span complex space frame, and the multiple first steel columns are evenly distributed along the length direction of the second side of the large-span complex space frame; A first lifting device is installed on the truss and the first steel column. Multiple first lifting devices on the truss are evenly distributed along the length direction of the first side of the large-span complex space frame. The slings of the first lifting devices on the truss and the first steel column are respectively connected to the first side and the second side of the large-span complex space frame. The large-span complex space frame is lifted for the first time using the first lifting device, so that the large-span complex space frame is in the designed position and left to stand still for a period of time. The large-span complex space frame is lifted by the first lifting device, so that the first side of the large-span complex space frame is positioned opposite to the truss; The first side of the large-span complex space frame is connected to the truss by a connecting rod, and the first lifting device on the truss is removed. Second steel columns are installed at both ends and the middle of the truss installation location, respectively; A plurality of second lifting devices are installed on the second steel column, and the slings of the plurality of second lifting devices are connected to the truss. The large-span complex space frame and the truss are lifted a second time using the second lifting device and the remaining first lifting device, so that the large-span complex space frame and the truss are in the designed posture and left to stand still for a period of time. The large-span complex space frame and the truss are lifted to the design elevation by the second lifting device and the remaining first lifting device, and edge sealing members are installed between the second side of the large-span complex space frame and the first steel column, and the truss is installed on the second steel column.

2. The in-situ non-uniformly distributed point overall cumulative lifting construction method for large-span complex space frames according to claim 1, characterized in that, The truss includes two truss segments arranged in the same direction. The second steel column is located at the end of the truss segment. After the truss segment is raised to the design elevation, a post-installed member is connected between the two truss segments and installed on the second steel column.

3. The in-situ non-uniformly distributed point overall cumulative lifting construction method for large-span complex space frames according to claim 1, characterized in that, The height of the first and second trial lifts is 100mm.

4. The in-situ non-uniformly distributed point overall cumulative lifting construction method for large-span complex space frames according to claim 1, characterized in that, The settling time after the first and second trial lifts is 2 to 24 hours.

5. The in-situ non-uniformly distributed point overall cumulative lifting construction method for large-span complex space frames according to claim 1, characterized in that, When dismantling the first lifting device on the truss, the first lifting devices on the first steel columns at both ends and in the middle of the second side of the large-span complex space frame are also dismantled.

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