Strong tidal bore area hoisting positioning device and positioning method

Abstract

The invention relates to the field of building construction, in particular to a strong tidal bore area hoisting positioning device and method.The strong tidal bore area hoisting positioning device comprises a flat barge, a crawler crane, a first RTK measuring instrument, a second RTK measuring instrument and a cockpit hoisting positioning control instrument, the device is provided with the first RTK measuring instrument and the second RTK measuring instrument, and position information of the crawler crane can be accurately obtained in real time; the preset hoisting grid chart is imported into the cockpit hoisting positioning control instrument, the position signal of the RTK measuring instrument is obtained in real time through the instrument, the posture of the arm lever can be accurately adjusted, the signal identification is made to move into the target grid, accurate positioning is achieved, and compared with a traditional mode of manually judging and simply identifying and measuring the hoisting position, the hoisting accuracy is greatly improved; the lifting landing set point position can be effectively controlled, the problems of embankment foot protection face leakage and the like caused by inaccurate positioning are solved, and the safety and durability of embankment foot reinforcement are guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of construction, and specifically to a hoisting positioning device and a positioning method in a strong tidal bore area. Background Art

[0002] With the rapid development of water conservancy and hydropower construction, making up for the weak links in flood control and promoting the high-quality development of water conservancy, in the project of upgrading and strengthening the seawall shore zone, the construction of the dike toe is the key to the construction of the seawall project.

[0003] The seawall dike is located in the strong tidal bore area of the Qiantang River and the confluence of the Sanjiang Estuary. Affected by the strong tidal bore, the flow velocity and direction change irregularly, the hydrology is complex, resulting in difficult ship positioning and extremely unstable ship body. The waterborne hoisting operation is difficult. Relying solely on traditional manual judgment and simple marking measurement of the hoisting position, it is very difficult to control the hoisting landing point accurately. If the strong tidal bore, large water flow velocity, changing flow direction, inaccurate hoisting point of the net sling, and loopholes in the dike toe protection surface occur, it will seriously affect the safety and durability of the dike toe reinforcement. To solve the above technical problems, a hoisting positioning device and a positioning method in a strong tidal bore area are proposed. Summary of the Invention

[0004] The purpose of the present invention is to provide a hoisting positioning device and a positioning method in a strong tidal bore area, which solves the problem of how to ensure accurate hoisting of the net sling in the strong tidal bore construction in the background art.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: A hoisting positioning device in a strong tidal bore area, comprising: A flat barge; A crawler crane, which is arranged on the deck of the flat barge; A first RTK surveying instrument, which is arranged on the top of the crawler crane; A second RTK surveying instrument, which is arranged on the top of the crawler crane; and A hoisting positioning control instrument for the cockpit, which is arranged in the cockpit of the crawler crane.

[0006] Preferably, it further includes a fixed locking ring and two I-beams. The fixed locking ring is fixedly arranged on the deck of the flat barge. The two I-beams respectively pass through the fixed locking ring, and the two I-beams are respectively fixedly connected to the front and rear crawlers of the crawler crane to fix the crawler crane on the deck of the flat barge.

[0007] Preferably, it further includes a first support frame and a second support frame. The first support frame is fixedly arranged on one side of the top of the crawler crane. The first RTK measuring instrument is fixedly arranged on the first support frame. The second support frame is fixedly arranged on the other side of the top of the crawler crane. The second RTK measuring instrument is fixedly arranged on the second support frame. Both the first support frame and the second support frame are made of angle steel processed, and the first support frame and the second support frame are respectively welded and fixed to the top plate steel of the crawler crane.

[0008] Preferably, the fixed locking ring is welded by profiled steel, and the fixed locking rings are arranged at intervals along the length direction of the deck of the flat barge.

[0009] Preferably, the first support frame and the second support frame are arranged in parallel on the top of the crawler crane, and the first support frame and the second support frame have the same height.

[0010] Preferably, a horizontal installation plane is provided on the top of the crawler crane, and both the first support frame and the second support frame are vertically fixed on the horizontal installation plane.

[0011] Preferably, fixing holes adapted to the I-beams are respectively formed in the front and rear crawlers of the crawler crane. The two ends of the I-beam pass through the fixed locking ring and then are inserted into the fixing holes and fixed by bolts. Preferably, both the first support frame and the second support frame include a horizontal support part and a vertical connection part. The horizontal support part is used to carry the RTK measuring instrument, and the vertical connection part is welded and fixed to the top of the crawler crane.

[0012] Preferably, after the crawler crane is fixed by the fixed locking ring and the I-beam, its body axis is parallel to the length direction of the deck of the flat barge.

[0013] A hoisting and positioning method in a strong tidal bore area includes the following steps: S1: Drive the flat barge to the construction area and drop the anchor to fix it. Fix the crawler crane on the deck through the fixed locking ring and the I-beam. When fixing the crawler crane, the two I-beams respectively pass through the fixed locking rings on the deck, and their two ends are connected to the fixing holes of the front and rear crawlers of the crawler crane by bolts. S2: Install a first RTK measuring instrument and a second RTK measuring instrument on the top of the crawler crane respectively through the first support frame and the second support frame. The first support frame and the second support frame are arranged in parallel on the top of the crawler crane, and both have the same height and are vertically fixed on the horizontal installation plane at the top. S3: Import the preset hoisting grid map into the hoisting positioning control instrument in the cockpit. The grid map is divided into positioning grids corresponding to the construction area, and the grid size of the hoisting grid map is adapted to the signal coverage range of the RTK survey instrument at the top of the crawler crane; S4: Operate the boom of the crawler crane to move. Obtain the position signal of the RTK survey instrument in real time through the control instrument, and adjust the boom attitude to move the signal mark into the target grid. When adjusting the boom attitude, control the rotation, telescoping and pitching actions of the boom by observing the relative position between the signal mark displayed on the control instrument and the target grid; S5: When the signal mark coincides with the target grid, control the net sling to sink and unhook to complete a single hoisting operation; S6: Repeat steps S4 - S5 until all net slings are placed according to the preset grid.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: 1. The device is equipped with a first RTK survey instrument and a second RTK survey instrument, which can accurately obtain the position information of the crawler crane in real time. Import the preset hoisting grid map into the hoisting positioning control instrument in the cockpit, and obtain the position signal of the RTK survey instrument in real time through the instrument. The boom attitude can be accurately adjusted to move the signal mark into the target grid, realizing precise positioning. Compared with the traditional method of relying on manual judgment and simple marking to measure the hoisting position, the accuracy of hoisting is greatly improved, and the hoisting landing fixed point can be effectively controlled, avoiding problems such as loopholes in the toe protection surface caused by inaccurate positioning, and ensuring the safety and durability of toe reinforcement.

[0015] 2. In the strong tidal bore area, the flow velocity and direction change irregularly and the hydrology is complex. It is difficult to position the ship and the ship body is unstable. By fixing the crawler crane on the flat barge and using the connection of the fixed locking ring and the I-beam, the axis of the crawler crane body is parallel to the length direction of the flat barge, enhancing the overall stability. On the basis of this stability, hoisting operations are carried out, which can better adapt to the complex hydrological environment in the strong tidal bore area. Compared with the traditional method, the feasibility and safety of hoisting operations under harsh conditions are improved.

[0016] 3. The clear steps and operation procedures in the positioning method, such as repeatedly operating to adjust the boom attitude to make the signal mark coincide with the target grid and then carrying out hoisting, can make the hoisting operation more standardized and standardized. Compared with the traditional hoisting method with greater randomness, it reduces the repeated adjustment and ineffective operations caused by inaccurate positioning, improves the construction efficiency, and speeds up the progress of projects such as toe reinforcement.

[0017] 4. There are relatively large errors in the traditional manual judgment of the hoisting position. However, this device uses advanced measuring instruments (RTK surveying instruments) and control instruments to minimize the influence of human factors. The operator only needs to accurately control the rotation, telescoping, and pitching movements of the boom according to the relative position between the signal mark displayed on the control instrument and the target grid, reducing the hoisting deviation caused by human judgment errors and improving the quality of the hoisting operation.

[0018] 5. The fixed locking rings are welded by steel sections and are arranged at intervals along the length direction of the flat barge. Two I-beams respectively pass through the fixed locking rings and are fixedly connected to the crawler crane. This fixing method enhances the connection stability between the crawler crane and the flat barge. Under the impact of strong tidal bores, it can effectively prevent the crawler crane from shaking or shifting, ensuring the safe progress of the hoisting operation. Compared with the traditional method, it greatly improves the stability of the device in complex environments.

[0019] 6. The overall structure design of the positioning device is reasonable, and the installation and connection methods of each component are clear. The first support frame and the second support frame are processed from angle steel and are fixedly welded to the top of the crawler crane. The installation is simple. During the operation process, the use of the hoisting positioning control instrument in the cab enables the operator to intuitively obtain position information and make operation adjustments, which is convenient for management and control. Compared with the traditional complex and difficult-to-accurately grasp hoisting method, it reduces the operation difficulty and improves the management efficiency.

[0020] 7. The precise positioning and stable device ensure that the mesh bag can be accurately placed at the preset grid position, making the toe protection surface more uniform and firm, avoiding protection loopholes caused by inaccurate hoisting points, thereby improving the quality of the toe reinforcement project, extending the service life of the project, and reducing the later maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of an embodiment of the mesh bag hoisting in the present invention; Figure 2 is the present invention Figure 1 a partial enlarged structural schematic diagram of part A in; Figure 3 is the present invention Figure 1 a partial enlarged structural schematic diagram of part B in; Figure 4 is a hoisting operation control diagram in the HIMAX construction positioning software of the present invention; Figure 5 is the present invention the present invention Figure 4 a partial enlarged structural schematic diagram of part C in.

[0022] Wherein: 1. Flat barge; 2. Crawler crane; 3. First RTK surveying instrument; 4. Second RTK surveying instrument; 5. Cockpit hoisting positioning control instrument; 6. First support frame; 7. Second support frame; 8. Fixed locking ring; 9. I-beam. Specific implementation manner

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to Figures 1-5 , a hoisting positioning device in a strong tidal bore area, including a flat barge 1, a crawler crane 2, a first RTK surveying instrument 3, a second RTK surveying instrument 4, and a cockpit hoisting positioning control instrument 5.

[0025] The hoisting positioning device in the strong tidal bore area is mainly composed of components such as a flat barge 1, a crawler crane 2, a first RTK surveying instrument 3, a second RTK surveying instrument 4, a cockpit hoisting positioning control instrument 5, a fixed locking ring 8, an I-beam 9, a first support frame 6, and a second support frame 7. These components cooperate with each other to form an efficient and precise hoisting positioning system.

[0026] The flat barge 1 serves as the operation platform of the entire device, playing an indispensable supporting role. In actual application scenarios, such as the seawall upgrading and reinforcement project of the Wenyan section of the West Jiangtang in the Qiantang River, a 500-ton flat barge 1 is selected. This selection is based on the engineering requirements. In the project, the alloy wire mesh bags used are large in size and heavy in weight, with the weight of a single mesh bag ≥ 5t. The flat barge 1 needs to have sufficient load-bearing capacity and stability to ensure that it can safely carry the crawler crane 2 and other equipment in a strong tidal bore environment and provide a stable operation basis for the hoisting operation. Its spacious deck space provides sufficient space for the installation and operation of the crawler crane 2, ensuring the smooth progress of the hoisting operation.

[0027] The crawler crane 2 is the core equipment for realizing the hoisting of the mesh bag. In this device, a 50-ton crawler crane 2 is used. It is set on the deck of the flat barge 1 and is firmly connected to the flat barge 1 through a fixed locking ring 8 and two I-beams 9. This connection method enables the crawler crane 2 to maintain stability during the hoisting operation, effectively avoiding hoisting errors caused by the shaking of the ship due to strong tidal bores. The powerful lifting capacity of the crawler crane 2 can easily handle the alloy wire mesh bags weighing ≥ 5t in the project, and its flexible boom operation performance provides the possibility for the precise positioning of the mesh bag.

[0028] The first RTK measuring instrument 3 and the second RTK measuring instrument 4 play a key role in the hoisting positioning process. Both are K20 high-precision split RTKs with excellent measurement performance. They can receive five-star sixteen-frequency signals, with a planar accuracy of up to centimeter level, and have precise positioning and orientation functions. The first RTK measuring instrument 3 is mainly responsible for positioning, accurately obtaining the position information of the top of the crane boom, while the second RTK measuring instrument 4 focuses on orientation, providing accurate data for adjusting the direction of the boom. These two measuring instruments are respectively installed on the first support frame 6 and the second support frame 7 on both sides of the top of the crawler crane 2. By monitoring the position and direction changes of the crane boom in real time, they provide accurate data support for the cockpit hoisting positioning control instrument 5 to ensure the accuracy of the hoisting operation.

[0029] The cockpit hoisting positioning control instrument 5 is installed in the cockpit of the crawler crane 2 and is a key device for the operator to control the hoisting operation. It uses the Windows operating system and has built-in HIMAX construction positioning software, which has powerful data analysis and display capabilities. Before construction, technicians import a detailed construction hoisting grid diagram (such as the common grid size of 2m×2m) into the software system. During construction, the instrument is connected to two RTK surveying instruments via two communication electrical lines, receiving real-time positioning information transmitted by the surveying instruments and converting it into intuitive images and data for display on the host terminal display. Based on this display information, the operator can clearly understand the real-time position of the RTK surveying instrument signal mark on the top of the boom, thereby accurately operating and controlling the boom movement of the crawler crane 2, ensuring that the signal mark moves precisely to the specified grid position and achieving accurate placement of the net bag. The cockpit hoisting positioning control instrument 5 cited in this embodiment is a monitoring system for the real-time movement of suspended objects during offshore platform hoisting construction, with patent authorization publication number CN106405598B.

[0030] The fixing lock ring 8 and the two I-beams 9 are important components to ensure that the crawler crane 2 is firmly installed on the deck of the flatbed barge 1. The fixing lock ring 8 is welded from steel sections and is spaced apart along the length of the flatbed barge 1, providing a stable connection point for the I-beams 9. The two 18# I-beams 9 pass through the fixing lock ring 8 respectively, and the two ends are inserted into the fixing holes pre-opened on both sides of the crawler crane 2 and fastened with bolts. This connection method is not only structurally stable, but also easy to install and disassemble. It can quickly complete the fixing and disassembly of the crawler crane 2 in different construction environments, thereby improving construction efficiency. At the same time, the synergistic effect of the fixing lock ring 8 and the I-beams 9 enables the crawler crane 2 to maintain a stable working state under the ship shaking environment caused by strong tidal surges, effectively reducing lifting errors.

[0031] The first support frame 6 and the second support frame 7 are respectively fixed on both sides of the top of the crawler crane 2, and are used to carry the first RTK surveying instrument 3 and the second RTK surveying instrument 4. They are all processed from 5# angle steel and have good strength and stability. The support frame includes a horizontal support part and a vertical connection part. The horizontal support part provides a stable installation plane for the RTK surveying instrument to ensure that the surveying instrument will not shake during operation. The vertical connection part is welded and fixed to the top plate steel of the crawler crane 2 to ensure the tight connection between the support frame and the crane. The first support frame 6 and the second support frame 7 are arranged in parallel, have the same height, and are both vertically fixed on the horizontal installation plane at the top of the crawler crane 2. This design enables the two RTK surveying instruments to be in the best measurement position, ensuring the accuracy and reliability of the measurement data.

[0032] Before the hoisting operation, first, the flat barge 1 needs to be accurately sailed into the construction area and anchored. This step is crucial because only when the flat barge 1 is stably fixed can the subsequent equipment installation and hoisting operations be carried out safely and smoothly. In strong tidal bore areas, the water flow is rapid and ship positioning is difficult. Operators need to have rich experience and precise operation skills. By anchoring, the flat barge 1 is firmly fixed in the predetermined position to effectively resist the water flow impact force brought by the strong tidal bore and ensure that the ship will not drift or shake during the construction process.

[0033] The fixation of the crawler crane 2 is a key link to ensure the safety and precision of the hoisting operation. Two 18# I-beams 9 are used to pass through the fixed locking rings 8 on the deck of the flat barge 1, and then the two ends of the I-beams 9 are inserted into the fixed holes on both sides of the crawler crane 2 and fastened with bolts. During the installation process, it is necessary to strictly follow the operating procedures to ensure the tight and reliable connection between the I-beams 9, the fixed locking rings 8, and the fixed holes. At the same time, the position and attitude of the crawler crane 2 need to be checked to ensure that its fuselage axis is parallel to the length direction of the flat barge 1. This can ensure the stability of the crane during operation and reduce the hoisting error caused by the inclination of the fuselage.

[0034] The welded fixation of the first support frame 6 and the second support frame 7 is an important prerequisite to ensure the measurement accuracy of the RTK surveying instrument. The support frame is processed from 5# angle steel. Before welding, a strict quality inspection of the support frame needs to be carried out to ensure that its dimensional accuracy and material quality meet the requirements. During welding, the vertical connection part of the support frame is welded to the top plate steel of the crawler crane 2. During the welding process, the welding quality needs to be ensured, and appropriate welding processes and parameters are adopted to ensure that the weld is firm and crack-free. After welding, the weld needs to be inspected to ensure that the welding quality meets the relevant standards and avoid the situation of the support frame loosening or falling off during use, which affects the measurement accuracy of the RTK surveying instrument.

[0035] Install the first RTK surveying instrument 3 and the second RTK surveying instrument 4 on the horizontal support parts of the first support frame 6 and the second support frame 7 respectively. During the installation process, ensure that the surveying instruments are firmly installed and the connection lines are correct. After the installation of the surveying instruments is completed, conduct debugging and calibration to ensure that they can work properly, accurately receive satellite signals, and accurately transmit the measurement data to the hoisting positioning control instrument 5 in the cockpit. During the debugging process, check the positioning accuracy, orientation accuracy of the surveying instruments and the stability of data transmission. If there are any problems, make adjustments and repairs in a timely manner.

[0036] The installation of the hoisting positioning control instrument 5 in the cockpit should ensure that its position is convenient for the operator to observe and operate. After installing the instrument at a suitable position in the cockpit, connect the communication electrical lines with the RTK surveying instrument to ensure the smoothness of data transmission. After the installation is completed, debug the instrument to check whether the software system is running normally, whether the display interface is clear, and whether the data display is accurate. At the same time, train the operator to make him familiar with the operation process and functions of the instrument and be able to proficiently perform the hoisting operation according to the information displayed on the instrument.

[0037] The installation of the communication electrical lines should be carried out strictly in accordance with the wiring specifications to ensure that the line connections are correct and firm, and avoid problems such as short circuits and open circuits in the lines. After the line installation is completed, conduct line testing to check the stability and accuracy of data transmission, and ensure that the data collected by the RTK surveying instrument can be transmitted to the hoisting positioning control instrument 5 in the cockpit in a timely and accurate manner, providing reliable data support for the hoisting operation. During the testing process, simulate different working environments and working conditions to check the performance of the lines under various circumstances. If there are any problems, conduct troubleshooting and repairs in a timely manner.

[0038] Before construction, the technical personnel should import the detailed hoisting positioning grid control data into the HIMAX construction positioning software of the hoisting positioning control instrument 5 in the cockpit. These data include the coordinate information of the construction area, the size and number of the grid, etc. By importing these data, the software system can generate an accurate hoisting positioning grid diagram. During the construction process, the operator can accurately control the movement of the crane boom according to the marks and data on the grid diagram and hoist the mesh bag accurately to the designated position.

[0039] The first RTK surveying instrument 3 and the second RTK surveying instrument 4 respectively conduct real-time monitoring on the position and direction of the top of the crane boom. By receiving satellite signals and using high-precision positioning algorithms, they can accurately calculate their own position and direction information. During the hoisting operation process, as the crane boom moves, the RTK surveying instrument continuously updates the measurement data and transmits these data to the hoisting positioning control instrument 5 in the cockpit in real time through the communication electrical lines.

[0040] After the cockpit hoisting positioning control instrument 5 receives the data transmitted by the RTK survey instrument, the HIMAX construction positioning software analyzes and processes the data. According to the pre-imported hoisting positioning grid control data, the software compares the position information of the RTK survey instrument at the top of the boom with the specified grid position, calculates the direction and distance that the boom needs to be adjusted. Then, the software displays this information in the form of intuitive images and data on the display screen of the host terminal, providing clear operation instructions for the driver.

[0041] According to the information displayed on the display screen of the cockpit hoisting positioning control instrument 5, the driver operates to control the movement of the boom of the crawler crane 2. By adjusting the length, angle and rotation direction of the boom, the signal marker of the RTK survey instrument at the top of the boom gradually approaches and finally moves to the specified grid position. During the operation, the driver should closely monitor the information changes on the display screen and perform precise operations according to the real-time data to ensure that the sling can be accurately hoisted to the predetermined position.

[0042] The hoisting positioning method in the strong tidal bore area includes the following steps: S1: Drive the flat barge 1 to the construction area and drop the anchor for fixation. Fix the crawler crane 2 on the deck through the fixed locking ring 8 and the I-beam 9. When fixing the crawler crane 2, the two I-beams 9 respectively pass through the fixed locking rings 8 on the deck, and their two ends are connected to the fixed holes of the front and rear crawlers of the crawler crane 2 by bolts; S2: Install the first RTK survey instrument 3 and the second RTK survey instrument 4 on the top of the crawler crane 2 through the first support frame 6 and the second support frame 7 respectively. The first support frame 6 and the second support frame 7 are arranged in parallel on the top of the crawler crane 2, with the same height and both vertically fixed on the horizontal installation plane at the top; S3: Import a preset hoisting grid map into the cockpit hoisting positioning control instrument 5. The grid map is divided into positioning grids corresponding to the construction area, and the grid size of the hoisting grid map is adapted to the signal coverage range of the RTK survey instrument at the top of the crawler crane 2; S4: Operate the boom of the crawler crane 2 to move, and obtain the position signal of the RTK survey instrument in real time through the control instrument. Adjust the boom attitude to move the signal marker into the target grid. When adjusting the boom attitude, observe the relative position of the signal marker and the target grid displayed on the control instrument, and control the rotation, telescoping and pitching actions of the boom; S5: When the signal marker coincides with the target grid, control the sling to sink and unhook to complete a single hoisting operation; S6: Repeat steps S4 - S5 until all slings are placed according to the preset grid.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A hoisting and positioning device in a strong tidal bore area, characterized in that Comprising: Flat barge (1); Crawler crane (2), which is arranged on the deck of the flat barge (1); First RTK surveying instrument (3), which is arranged on the top of the crawler crane (2); Second RTK surveying instrument (4), which is arranged on the top of the crawler crane (2); And Cockpit hoisting positioning control instrument (5), which is arranged in the cockpit of the crawler crane (2).

2. The lifting and positioning device in a strong tidal bore area according to claim 1, wherein It further includes a fixed locking ring (8) and two I-beams (9). The fixed locking ring (8) is fixedly arranged on the deck of the flat barge (1). The two I-beams (9) respectively pass through the fixed locking ring (8), and the two I-beams (9) are respectively fixedly connected to the crawler crane (2) to fix the crawler crane (2) on the deck of the flat barge (1).

3. The lifting and positioning device in the strong tidal bore area according to claim 1, wherein It further includes a first support frame (6) and a second support frame (7). The first support frame (6) is fixedly arranged on one side of the top of the crawler crane (2), and the first RTK surveying instrument (3) is fixedly arranged on the first support frame (6). The second support frame (7) is fixedly arranged on the other side of the top of the crawler crane (2), and the second RTK surveying instrument (4) is fixedly arranged on the second support frame (7). Both the first support frame (6) and the second support frame (7) are processed from angle steel, and the first support frame (6) and the second support frame (7) are respectively welded and fixed to the top plate steel of the crawler crane (2).

4. The hoisting and positioning device in the strong tidal bore area according to claim 3, wherein, The fixed locking ring (8) is welded by profiled steel, and the fixed locking rings (8) are arranged at intervals along the length direction of the flat barge (1).

5. The lifting and positioning device in a strong tidal bore area according to claim 2, wherein The first support frame (6) and the second support frame (7) are arranged in parallel on the top of the crawler crane (2), and the first support frame (6) and the second support frame (7) have the same height.

6. The lifting and positioning device in the strong tidal bore area according to claim 3, characterized in that, There is a horizontal installation plane on the top of the crawler crane (2), and both the first support frame (6) and the second support frame (7) are vertically fixed on the horizontal installation plane.

7. The lifting and positioning device in the strong tidal bore area according to claim 1, characterized in that Fixing holes adapted to the I-beams (9) are respectively opened on both sides of the crawler crane (2). After the two ends of the I-beams (9) pass through the fixed locking ring (8), they are inserted into the fixing holes and fixed by bolts.

8. The lifting and positioning device in a strong tidal bore area according to claim 2, wherein Both the first support frame (6) and the second support frame (7) include a horizontal support part and a vertical connection part. The horizontal support part is used to carry the first RTK surveying instrument (3) and the second RTK surveying instrument (4), and the vertical connection part is welded and fixed to the top of the crawler crane (2).

9. The lifting and positioning device in the strong tidal bore area according to claim 3, characterized in that, After the crawler crane (2) is fixed by the fixed locking ring (8) and the I-beams (9), its fuselage axis is parallel to the length direction of the flat barge (1).

10. The hoisting and positioning method in a strong tidal bore area according to any one of claims 1-9, characterized in that, Including the following steps: S1: Move the flat barge (1) to the construction area and drop the anchor for fixation. Fix the crawler crane (2) on the deck through the fixed locking ring (8) and the I-beam (9). When fixing the crawler crane (2), the two I-beams (9) respectively pass through the fixed locking rings (8) on the deck, and their two ends are bolted to the fixing holes of the front and rear crawlers of the crawler crane (2). S2: Install the first RTK surveying instrument (3) and the second RTK surveying instrument (4) on the top of the crawler crane (2) through the first support frame (6) and the second support frame (7) respectively. The first support frame (6) and the second support frame (7) are arranged in parallel on the top of the crawler crane (2), with the same height and both vertically fixed on the horizontal installation plane at the top. S3: Import the preset hoisting grid map into the cockpit hoisting positioning control instrument (5). The grid map is divided into positioning grids corresponding to the construction area, and the grid size of the hoisting grid map is adapted to the signal coverage range of the RTK surveying instrument on the top of the crawler crane (2). S4: Operate the boom of the crawler crane (2) to move. Obtain the position signals of the RTK surveying instrument in real time through the control instrument, and adjust the boom attitude to move the signal mark into the target grid. When adjusting the boom attitude, observe the relative position of the signal mark displayed on the control instrument and the target grid, and control the rotation, telescoping and pitching actions of the boom. S5: When the signal mark coincides with the target grid, control the net bag to sink and unhook to complete a single hoisting operation. S6: Repeat steps S4 - S5 until all the net bags are placed according to the preset grid.

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