A lifting structure and method for controlling the synchronous lifting accuracy and safety of a truss

Abstract

The present invention relates to the technical field of construction equipment, and particularly relates to a lifting structure and method for controlling the lifting precision and safety of a truss. The lifting structure includes a lifting device, a horizontal displacement monitoring device, a vertical displacement monitoring device, a control system, and a steel truss. The lifting device is arranged above the designed position of the steel truss, and its output end is connected to the steel truss through a steel bracket. The horizontal displacement monitoring devices are arranged on both sides of the vertical lifting line of the steel truss, and the steel truss is in rolling connection with the horizontal displacement monitoring devices through rollers arranged at both ends of the lower chord of the steel truss. The vertical displacement monitoring device is arranged at the position of the vertical projection point on the ground of the lifting suspension point of the steel truss. The control system is in communication connection with the horizontal displacement monitoring device and the vertical displacement monitoring device. During the lifting process of the truss in the present invention, the horizontal offset situation of the truss can be viewed in real time, and adjustments can be made in time after problems are found, avoiding a large number of small-amplitude lifts and reducing the construction time.

Description

Technical Field

[0001] The present invention relates to the technical field of construction equipment, and particularly to a lifting structure for controlling the lifting precision and safety of a truss.

[0002] The present invention also relates to a lifting method for the above-mentioned lifting structure. Background Art

[0003] With the rapid development of modern engineering technology science and economy, super high-rise buildings in the civil engineering industry are increasing day by day, and at the same time, they are developing in the directions of complex shapes and diverse functions. In order to better meet the needs of building functions and building arts, complex structural forms such as transfer story structures, strengthened story structures, split-level structures, multi-tower structures, vertical tower reduction structures, and facade openings have emerged.

[0004] As an essential part of them, the transfer story structure is also used more and more frequently. Especially in the multi-tower structure system, the steel truss transfer story plays a connecting role between the upper and lower parts and provides a connection for adjacent towers. The steel truss transfer story has reasonable and clear force, simple structure, and light self-weight, and can adapt to large-span transfers, and has a broader application prospect in the future.

[0005] At present, the high-altitude conversion steel truss lifting operation mainly involves lifting the truss by a small amount and then standing still for 4 - 12 hours, using instruments such as total stations to observe the deviation between the position of the truss and the actual position, and then maintaining the vertical lifting precision in a fine-tuning manner, lifting by a small amount again, and then standing still for observation and adjustment, and so on in a cycle until the truss is lifted to the designated position. This lifting scheme requires multiple lifts of the truss, cannot lift the truss to the designed position at one time, cannot monitor the truss in real time during the lifting process, cannot adjust the truss in time after it deviates, and it is difficult to ensure the lifting precision of the truss, which is time-consuming and laborious. Summary of the Invention

[0006] Therefore, the technical problem to be solved by the present invention is to provide a lifting structure for controlling the synchronous lifting precision and safety of a truss, which can monitor the deviation of the truss in real time during the lifting process, adjust it in time, so that it can be quickly lifted to the designed position, improve the lifting efficiency, and reduce the hoisting construction period.

[0007] Another technical problem to be solved by the present invention is to provide a lifting method for the above-mentioned lifting structure.

[0008] A lifting structure for controlling the synchronous lifting precision and safety of a truss includes a lifting device, a horizontal displacement monitoring device, a vertical displacement monitoring device, a control system, and a steel truss.

[0009] Steel corbels are arranged on both sides of the lower chord box girder of the steel truss, and the lifting device is arranged above the designed position of the steel truss, and its output end is connected to the steel corbel.

[0010] The horizontal displacement monitoring device is arranged on both sides of the vertical lifting line of the steel truss. The steel truss is in rolling connection with the horizontal displacement monitoring device through rollers arranged at both ends of the lower chord of the steel truss.

[0011] The vertical displacement monitoring device is arranged at the position of the vertical projection point of the lifting point of the steel truss on the ground, and is connected to the control system through a built-in wireless transmission module.

[0012] The control system is also connected to the horizontal displacement monitoring device through a wire.

[0013] As a preference for the lifting structure for controlling the synchronous lifting accuracy and safety of the truss in the present invention, the lifting device includes a lifting bracket, a hydraulic lifter, a steel strand and a hydraulic pump source system. The lifting bracket is fixed above the designed position of the steel truss through a pre-installed truss. The hydraulic lifter is installed on the lifting bracket. One end of the steel strand is connected to the hydraulic lifter, and the other end is fixedly connected to the steel truss through a steel corbel. The hydraulic pump source system is connected to the hydraulic lifter.

[0014] As a preference for the lifting structure for controlling the synchronous lifting accuracy and safety of the truss in the present invention, the horizontal displacement monitoring device includes a track, a pressure sensor and a displacement sensor. The track is arranged parallel to the vertical lifting line of the steel truss and is connected to the buildings on both sides of the steel truss through a precast steel truss. The roller is connected to the bottom of the groove on the track. The pressure sensor and the displacement sensor are located on the back of the track. The pressure sensor and the displacement sensor are both arranged at intervals along the axial direction of the track. The wire is pasted on the outer wall of the track, one end of which is connected to the pressure sensor or the displacement sensor, and the other end is connected to the control system.

[0015] As a preference for the lifting structure for controlling the synchronous lifting accuracy and safety of the truss in the present invention, the track is made of 20# channel steel, and the distance from the connection end of the steel truss and the roller is 0.3 m to 0.5 m.

[0016] As a preference for the lifting structure for controlling the synchronous lifting accuracy and safety of the truss in the present invention, the pressure sensor adopts a strain type chip, the model of the displacement sensor is NADO, and the distance between every two adjacent displacement sensors is 1 m.

[0017] As a preference for the lifting structure for controlling the synchronous lifting accuracy and safety of the truss in the present invention, the roller can freely roll up and down in the groove without generating pressure when the steel truss has no horizontal offset.

[0018] As a preference for the lifting structure that controls the synchronous lifting accuracy and safety in the present invention, the vertical displacement monitoring device is a phase laser rangefinder, and the transmission modes of the wireless transmission module include Bluetooth, WIFI, NB-LOT, and LORA.

[0019] As a preference for the lifting structure that controls the synchronous lifting accuracy and safety in the present invention, the control system includes an acquisition box and a display terminal. An integrated computer module is arranged inside the acquisition box, and its input end is connected to a pressure sensor and a displacement sensor through wires, collecting and analyzing the horizontal displacement and the horizontal pressure generated during the lifting of the steel truss measured by the above two, and then uploading to the display terminal through the output end.

[0020] As a preference for the lifting structure that controls the synchronous lifting accuracy and safety in the present invention, the display terminal is connected with an alarm device, and when the measured horizontal displacement and / or horizontal pressure exceed the threshold set by the alarm device, the warning is activated.

[0021] The present invention also provides a lifting method for the lifting structure that controls the synchronous lifting accuracy and safety of the truss. The specific lifting method is as follows:

[0022] S1: Installation of the lifting device: Install the lifting bracket above the designed position of the steel truss through the pre-installed truss, install the hydraulic lifter on the lifting bracket, connect one end of the steel strand to the hydraulic lifter, and finally connect the hydraulic pump source system to the hydraulic lifter;

[0023] S2: Installation of the steel corbel and rollers: Determine the vertical lifting route of the steel truss through the projection position of the lifting points in S1, then weld the steel corbels on both sides of the lower chord box girder of the steel truss, connect the other end of the steel strand to the steel corbel, and install the rollers at both ends of the lower chord rod by means of temporary welding;

[0024] S3: Installation of the horizontal displacement monitoring device: Install the displacement sensor and the pressure sensor at intervals on the back of the channel steel. The distance between adjacent two pressure sensors is set to one meter. Paste the wire on the outer wall of the channel steel and connect one end of it to the displacement sensor or the pressure sensor. Then connect the channel steel to the built buildings on both sides of the vertical lifting route of the steel truss through the prefabricated steel truss. After installation, the distance between the channel steel and the end of the steel truss should be 0.3m - 0.5m, and the bottom of the groove on the channel steel should just be connected to the roller after installation. Finally, connect the other end of the wire to the acquisition box;

[0025] S4: Installation of the vertical displacement monitoring device: Install the laser rangefinder at the vertical projection point on the ground of the lifting point of the steel truss, and connect the laser rangefinder to the display terminal through the internal wireless transmission module;

[0026] S5: Lifting operation: First, check whether there are potential safety hazards in the lifting device and the horizontal displacement monitoring device, and whether the display terminal can display the data measured by the pressure sensor, displacement sensor, and laser rangefinder. After everything is normal, start lifting.

[0027] S5.1: During the lifting process, the display terminal is used to monitor the change in pressure of the steel truss passing through the measuring points in real time, and check whether the displacements of each lifting point measured by the laser rangefinder are the same. If the difference between different lifting points is more than 20 mm, stop lifting, and use the hydraulic pump source system to fine-tune each lifting point to make it on the same horizontal plane.

[0028] S5.2: When the parameter measured by the pressure sensor on the back of the channel steel exceeds 2e 4 kN, stop lifting, use the jack to fine-tune the hydraulic lifter on the compressed side in the opposite direction, and continue lifting only after the adjustment is completed. When the parameter measured by the displacement sensor on the back of the channel steel reaches 15 mm, stop lifting, correct it, and then continue lifting until the steel truss reaches the designed position.

[0029] S6: After completing the lifting operation, remove the horizontal displacement monitoring device and the vertical displacement monitoring device.

[0030] The technical solution of the present invention has the following advantages:

[0031] 1. By setting horizontal displacement monitoring devices on the buildings at both ends of the steel truss, during the lifting process of the steel truss, operators can view the horizontal offset of the steel truss in real time through the control system. After discovering problems, the steel truss can be adjusted in time, without the need to lift it slightly and then use instruments such as total stations to observe the steel truss, avoiding a large number of small lifts and reducing the construction time.

[0032] 2. By setting vertical displacement monitoring devices at the vertical projection points of the lifting points of the steel truss on the ground, operators can view the vertical displacement of each lifting point in real time through the control system, preventing the steel truss from tipping over caused by asynchronous lifting of each lifting point and ensuring construction safety.

[0033] 3. By matching the rollers with the slide rails, it plays a certain guiding role for the steel truss, facilitating the hoisting of the steel truss to the designed position in a short time, improving the construction accuracy and efficiency, and reducing the construction cost. Description of the Drawings

[0034] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0035] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0036] Figure 2 It is a schematic diagram of the track structure of the present invention.

[0037] Figure 3 It is a schematic diagram of the sensor arrangement of the present invention.

[0038] Figure 4 It is a schematic diagram of the laser rangefinder arrangement of the present invention.

[0039] Explanation of reference numerals:

[0040] 1, steel truss; 101, roller; 2, lifting bracket; 3, hydraulic lifter; 4, steel strand; 5, track; 6, pressure sensor; 7, displacement sensor; 8, wire; 9, laser rangefinder. Specific embodiments

[0041] The following will clearly and completely describe the technical solutions of the present invention with reference to the drawings. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0042] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0043] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0044] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0045] This embodiment provides a lifting structure for controlling the synchronous lifting accuracy and safety of a truss, as Figure 1 shown, including a lifting device, a horizontal displacement monitoring device, a vertical displacement monitoring device, a control system, and a steel truss 1.

[0046] Steel corbels are arranged on both sides of the lower chord box girder of the steel truss 1 close to the building body, and the lifting device is arranged above the designed position of the steel truss 1, and its output end is connected to the steel corbel.

[0047] The horizontal displacement monitoring device is arranged on both sides of the vertical lifting line of the steel truss 1, and the steel truss 1 is in rolling connection with the horizontal displacement monitoring device through rollers 101 arranged at both ends of the lower chord of the steel truss 1; the horizontal displacement monitoring device can not only detect the offset of the steel truss 1 in the horizontal direction, but also play a certain limiting role during the lifting process of the steel truss 1.

[0048] The vertical displacement monitoring device is arranged at the position of the vertical projection point on the ground of the lifting suspension point of the steel truss 1, and is connected to the control system through a built-in wireless transmission module.

[0049] The control system is also connected to the horizontal displacement monitoring device through a wire 8.

[0050] With the above structure, by arranging a horizontal displacement monitoring device on the building body at both ends of the steel truss 1, during the lifting process of the steel truss 1, the operator can view the horizontal offset of the steel truss 1 in real time through the control system, and adjust the steel truss 1 in time after discovering problems, without the need to lift it slightly and then use instruments such as total stations to observe the steel truss 1, avoiding a large number of small lifts and reducing the construction time; at the same time, the laser rangefinder 9 arranged at the position of the vertical projection point on the ground of the lifting suspension point of the steel truss 1 enables the operator to view the vertical displacement of each suspension point in real time, preventing the steel truss 1 from tipping over caused by the asynchronous lifting of each suspension point and ensuring the construction safety.

[0051] In this embodiment, the lifting device includes a lifting bracket 2, a hydraulic lifter 3, a steel strand 4, and a hydraulic pump source system. The steel truss 1 is installed between two buildings. The number of lifting brackets 2 is an even number. The lifting brackets 2 are divided into two groups. The two groups of lifting brackets 2 are respectively installed on the reinforced concrete floor above the designed position of the steel truss 1 through pre-installed trusses. A hydraulic lifter 3 is provided on each lifting bracket 2. One end of the steel strand 4 is connected to the hydraulic lifter 3, and the other end is fixedly connected to the steel truss 1 through a steel corbel. The hydraulic pump source system is connected to the hydraulic lifter 3.

[0052] As Figures 2 - 3 shown, in this embodiment, the horizontal displacement monitoring device includes a track 5, a pressure sensor 6, and a displacement sensor 7. The track 5 is arranged parallel to the vertical lifting line of the steel truss 1. It is connected to the buildings on both sides of the steel truss 1 through a precast steel truss to ensure that it has the strength to bear part of the horizontal stress. The roller 101 is connected to the bottom of the groove on the track 5. It can roll up and down freely in the groove without generating pressure when the steel truss 1 has no horizontal offset. When the steel truss 1 is offset during the lifting process, the roller 101 can transmit the pressure caused by the offset of the steel truss 1. A plurality of the pressure sensors 6 are installed at intervals on the back of the track 5 and extend along its axial direction; a plurality of the displacement sensors 7 are also located on the back of the track 5 and are installed near the pressure sensors 6. The distance between two adjacent displacement sensors 7 is 1 m. The wire 8 is pasted on the outer wall of the track 5. One end of it is connected to the pressure sensor 6 or the displacement sensor 7, and the other end is connected to the control system.

[0053] In this embodiment, the track 5 is made of 20# channel steel, and the distance from the connection end of the steel truss 1 and the roller 101 is 0.3 m to 0.5 m.

[0054] With the above structure, the channel steel is a common material at the construction site, which is convenient for manufacturing, and it has a certain structural strength and can meet the relevant lifting requirements.

[0055] In this embodiment, the pressure sensor 6 uses a strain type chip, and the model of the displacement sensor 7 is NADO.

[0056] As Figure 4 shown, in this embodiment, the vertical displacement monitoring device is a phase type laser rangefinder 9, and the transmission methods of the wireless transmission module include Bluetooth, WIFI, NB-LOT, and LORA.

[0057] In this embodiment, the control system includes a collection box and a display terminal. The collection box uses a FieldDAQ strain / bridge input device to collect the data acquired by the horizontal displacement monitoring device through wire 8, processes the data through the integrated computer module inside it, and then uploads the data to the display terminal. Construction workers regulate the lifting process through the display terminal, and the control system realizes the visualization of the horizontal stress and displacement during the lifting of the steel truss 1 through the collection box and the display terminal.

[0058] In this embodiment, the display terminal is also connected to an alarm device. If the measured horizontal force or displacement exceeds the set threshold, the alarm is activated to remind the operator to stop the lifting operation in time and adjust the steel truss 1.

[0059] In this implementation, the display terminal is a mobile phone, a tablet computer or a computer.

[0060] This embodiment also provides a lifting method for a lifting structure that controls the synchronous lifting accuracy and safety of the truss, specifically including the following steps:

[0061] S1: Installation of the lifting device: Install the lifting bracket 2 above the designed position of the steel truss 1 through the pre-installed truss, install the hydraulic jack 3 on the lifting bracket 2, connect one end of the steel strand 4 to the hydraulic jack 3, and finally connect the hydraulic pump source system to the hydraulic jack 3.

[0062] S2: Installation of the steel corbel and the roller: Determine the vertical lifting route of the steel truss 1 through the projection position of the lifting point in S1, then weld the steel corbels on both sides of the lower chord box girder of the steel truss 1, connect the other end of the steel strand 4 to the steel corbel, and install the rollers 101 at both ends of the lower chord by means of temporary welding.

[0063] S3: Installation of the horizontal displacement monitoring device: Install the displacement sensor 7 and the pressure sensor 6 at intervals on the back of the channel steel. The distance between two adjacent pressure sensors 6 is set to one meter. Paste the wire 8 on the outer wall of the channel steel and connect one end of it to the displacement sensor 7 or the pressure sensor 6. Subsequently, connect the channel steel to the buildings already built on both sides of the vertical lifting route of the steel truss 1 through the prefabricated steel truss. After installation, the distance between the channel steel and the end of the steel truss 1 should be 0.3m - 0.5m, and the bottom of the groove on the channel steel should just be connected to the roller 101 after installation. Finally, connect the other end of the wire 8 to the collection box.

[0064] S4: Installation of the vertical displacement monitoring device: Install the laser rangefinder 9 at the vertical projection point on the ground of the lifting point of the steel truss 1 and connect the laser rangefinder 9 to the display terminal through the internal wireless transmission module.

[0065] S5: Lifting operation: First, check whether there are potential safety hazards in the lifting device and the horizontal displacement monitoring device, and whether the display terminal can display the data measured by the pressure sensor 6, the displacement sensor 7, and the laser rangefinder 9. After everything is normal, start lifting.

[0066] S5.1: During the lifting process, the display terminal is used to monitor the change of the pressure of the steel truss 1 passing through the measuring point in real time, and check whether the displacements of each lifting point measured by the laser rangefinder 9 are the same. If the difference between different lifting points is more than 20 mm, stop lifting and fine-tune each lifting point through the hydraulic pump source system to make them on the same horizontal plane.

[0067] S5.2: When the parameter measured by the pressure sensor 6 on the back of the channel steel exceeds 2e 4 kN, stop lifting, use the jack to fine-tune the hydraulic lifter 3 on the compressed side in the opposite direction, and continue lifting only after the adjustment is completed. When the parameter measured by the displacement sensor 7 on the back of the channel steel reaches 15 mm, stop lifting, correct it, and then continue lifting until the steel truss 1 reaches the designed position.

[0068] S6: After completing the lifting operation, remove the horizontal displacement monitoring device and the vertical displacement monitoring device.

[0069] Obviously, the above embodiments are only examples for clear illustration and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A lifting structure for controlling the synchronous lifting accuracy and safety of a truss, characterized in that: it includes a lifting device, a horizontal displacement monitoring device, a vertical displacement monitoring device, a control system and a steel truss (1); Steel corbels are arranged on both sides of the lower chord box girder of the steel truss (1), and the lifting device is arranged above the designed position of the steel truss (1), and its output end is connected to the steel corbel; The horizontal displacement monitoring device is arranged on both sides of the vertical lifting line of the steel truss (1), and the steel truss (1) is in rolling connection with the horizontal displacement monitoring device through rollers (101) arranged at both ends of the lower chord rod of the steel truss (1); The vertical displacement monitoring device is arranged at the position of the vertical projection point on the ground of the lifting suspension point of the steel truss (1), and it is connected to the control system through a built-in wireless transmission module; The control system is also connected to the horizontal displacement monitoring device through a wire (8); The horizontal displacement monitoring device includes a track (5), a pressure sensor (6) and a displacement sensor (7). The track (5) is arranged parallel to the vertical lifting line of the steel truss (1), and it is connected to the buildings on both sides of the steel truss (1) through a prefabricated steel truss. The roller (101) is connected to the bottom of the groove on the track (5). The pressure sensor (6) and the displacement sensor (7) are located on the back of the track (5). The pressure sensor (6) and the displacement sensor (7) are both arranged at intervals along the axial direction of the track (5). The wire (8) is pasted on the outer wall of the track (5), one end of which is connected to the pressure sensor (6) or the displacement sensor (7), and the other end is connected to the control system.

2. The lifting structure for controlling the synchronous lifting accuracy and safety of a truss according to claim 1, characterized in that, the lifting device includes a lifting bracket (2), a hydraulic lifter (3), a steel strand (4) and a hydraulic pump source system. The lifting bracket (2) is fixed above the designed position of the steel truss (1) through a pre-installed truss. The hydraulic lifter (3) is installed on the lifting bracket (2). One end of the steel strand (4) is connected to the hydraulic lifter (3), and the other end is fixedly connected to the steel truss (1) through a steel corbel. The hydraulic pump source system is connected to the hydraulic lifter (3).

3. The lifting structure for controlling the synchronous lifting accuracy and safety of a truss according to claim 1, characterized in that, the track (5) is made of 20# channel steel, and the distance from the connection end of the steel truss (1) and the roller (101) is 0.3m to 0.5m.

4. The lifting structure for controlling the synchronous lifting accuracy and safety of a truss according to claim 1, characterized in that, the pressure sensor (6) adopts a strain type chip, the model of the displacement sensor (7) is NADO, and the distance between every two adjacent displacement sensors (7) is 1m.

5. The lifting structure for controlling the synchronous lifting accuracy and safety of a truss according to claim 1, characterized in that, when the steel truss (1) has no horizontal offset, the roller (101) can freely roll up and down in the groove without generating pressure.

6. The lifting structure for controlling the synchronous lifting accuracy and safety of a truss according to claim 1, characterized in that, The vertical displacement monitoring device is a phase laser rangefinder (9), and the transmission methods of the wireless transmission module include Bluetooth, WIFI, NB-LOT, and LORA.

7. The lifting structure for controlling the synchronous lifting accuracy and safety of the truss according to claim 1, characterized in that the control system includes an acquisition box and a display terminal. An integrated computer module is arranged inside the acquisition box, and its input end is connected to a pressure sensor (6) and a displacement sensor (7) through a wire (8). The horizontal displacement and the horizontal pressure generated during the lifting of the steel truss (1) measured by the above two are collected and analyzed, and then uploaded to the display terminal through the output end.

8. The lifting structure for controlling the synchronous lifting accuracy and safety of the truss according to claim 7, characterized in that the display terminal is connected with an alarm device, and when the measured horizontal displacement and / or horizontal pressure exceed the threshold set by the alarm device, the warning is activated.

9. A lifting method for a lifting structure for controlling the synchronous lifting accuracy and safety of a truss, characterized in that it includes a lifting structure for controlling the synchronous lifting accuracy and safety of a truss according to any one of claims 1-8, and the specific lifting method is as follows: S1: Installation of the lifting device: Install the lifting bracket (2) above the designed position of the steel truss (1) through a pre-installed truss, install the hydraulic lifter (3) on the lifting bracket (2), connect one end of the steel strand (4) to the hydraulic lifter (3), and finally connect the hydraulic pump source system to the hydraulic lifter (3); S2: Installation of the steel corbel and the roller: Determine the vertical lifting route of the steel truss (1) through the projection position of the lifting point in S1, then weld the steel corbel on both sides of the lower chord box girder of the steel truss (1), connect the other end of the steel strand (4) to the steel corbel, and install the roller (101) at both ends of the lower chord rod by means of temporary welding; S3: Installation of the horizontal displacement monitoring device: Install the displacement sensor (7) and the pressure sensor (6) at intervals on the back of the channel steel. The distance between adjacent two pressure sensors (6) is set to one meter. Paste the wire (8) on the outer wall of the channel steel, and connect one end of it to the displacement sensor (7) or the pressure sensor (6). Then connect the channel steel to the built buildings on both sides of the vertical lifting route of the steel truss (1) through a prefabricated steel truss. After installation, the distance between the channel steel and the end of the steel truss (1) should be 0.3m - 0.5m, and the bottom of the groove on the channel steel should just be connected to the roller (101) after installation. Finally, connect the other end of the wire (8) to the acquisition box; S4: Installation of the vertical displacement monitoring device: Install the laser rangefinder (9) at the vertical projection point of the lifting point of the steel truss (1) on the ground, and connect the laser rangefinder (9) to the display terminal through the internal wireless transmission module; S5: Lifting operation: First, check whether there are potential safety hazards in the lifting device and the horizontal displacement monitoring device, and whether the display terminal can display the data measured by the pressure sensor (6), the displacement sensor (7), and the laser rangefinder (9). After everything is normal, start lifting; S5.1: During the lifting process, the change in the pressure of the steel truss (1) passing through the measuring points is monitored in real time through the display terminal, and it is checked whether the displacements of each lifting point measured by the laser rangefinder (9) are the same. If the difference between different lifting points is more than 20 mm, the lifting is stopped, and each lifting point is finely adjusted through the hydraulic pump source system to make it on the same horizontal plane; S5.2: When the parameter measured by the pressure sensor (6) on the back of the channel steel exceeds 2e 4 kN, stop the lifting. Use the jack to finely adjust the hydraulic lifter (3) on the compressed side in the opposite direction. Only after the adjustment can the lifting be continued. When the parameter measured by the displacement sensor (7) on the back of the channel steel reaches 15 mm, stop the lifting. After rectifying it, the lifting can be continued until the steel truss (1) reaches the designed position; S6: After completing the lifting operation, remove the horizontal displacement monitoring device and the vertical displacement monitoring device.

Images