Water cutting equipment and main beam widening construction method based on water cutting

Abstract

The invention discloses water cutting equipment and a main beam widening construction method based on water cutting, and relates to the technical field of concrete bridge dismantling and building construction.The equipment comprises a walking mechanism, a water supply mechanism, a spraying mechanism and a sensing system; the method comprises the following steps: controlling the rotating speed of an impeller to cut concrete reinforcements for multiple times and respectively acquiring cutting images, judging position change parameters of each reinforcement in the previous three images on the basis of an initial cutting image, a secondary cutting image and a fine cutting image, and determining a reinforcement stability coefficient according to the position change parameters. And the stability coefficient of each steel bar is combined to be matched with the respective welding mode, and a welding strategy is formed according to all the welding modes so as to carry out girder widening operation. According to the equipment and the construction method, on the basis of traditional water cutting, real-time adjustment of jet flow speed control is considered, and a data sensing function of a steel bar position form is supplemented, so that a better structure foundation condition and an operation reference strategy are provided for subsequent main beam splicing and welding construction.

Description

Technical Field

[0001] This invention relates to the field of concrete bridge demolition and reconstruction technology, and more specifically, to a waterjet cutting device and a method for widening the main beam based on waterjet cutting. Background Technology

[0002] To meet the ever-increasing traffic demands, existing bridges need to be widened. To ensure a stable connection between the new and old bridges during the widening process, precise cutting of the existing bridge beams is required. While existing concrete cutting methods, such as mechanical cutting, do meet the engineering requirements to some extent, they also present several problems. Firstly, efficiency is often low, cutting precision is difficult to guarantee, and there is a risk of damaging the steel reinforcement structure of the bridge. Secondly, they easily generate noise and dust pollution, which can negatively impact the surrounding environment and the health of construction workers.

[0003] Existing technologies include water jet cutting for concrete construction. This technology utilizes a high-pressure water pump to pressurize water to extremely high pressures of hundreds or even thousands of bar, then forms a high-speed jet through a special nozzle. This jet directly impacts the concrete surface, creating a powerful impact and abrasive effect, thus achieving heat-free cutting and effectively avoiding the thermal effects of traditional cutting methods. However, when using this water jet cutting technology, mismatched spray pressure can easily lead to the deformation or damage of pre-installed reinforcing bars while cutting the concrete. This not only prevents the subsequent welding of the reinforcing bars to the bridge during widening operations but also necessitates stability repairs for the deformed or loosened bars, increasing the complexity of subsequent welding work.

[0004] In view of the above, this application is hereby submitted. Summary of the Invention

[0005] The first objective of this invention is to provide a water jet cutting device that has a jet flow rate control function and a concrete reinforcement scanning function. It can acquire data based on the real-time concrete shape after cutting, so as to adjust and match the appropriate jet flow rate in the future and ensure the integrity and stability of the reinforcement.

[0006] The second objective of this invention is to provide a method for widening a main beam based on water-cutting. This method utilizes the aforementioned water-cutting equipment to cut the concrete bridge deck multiple times, continuously adjusts the jetting flow rate based on the scanned images after each cut, and can match a more suitable widening welding strategy based on the influence of the concrete reinforcement obtained from the final scan, thereby reducing the complexity of subsequent construction welding.

[0007] The embodiments of the present invention are implemented as follows:

[0008] In a first aspect, a waterjet cutting device includes a traveling mechanism, a water supply mechanism, a jetting mechanism, and a sensing system. The traveling mechanism is equipped with a tracking device for tracking according to a planned path. The water supply mechanism includes a central water tank and a conveying channel connected to the outlet of the central water tank, the central water tank being connected to a water source. The jetting mechanism includes a nozzle, a jet pump, and a jet flow control assembly. The inlet of the jet pump is connected to the conveying channel, the nozzle is connected to the outlet of the jet pump, and the nozzle is used for jet cutting concrete and / or reinforcing steel. The jet flow control assembly is used to adjust the jet pump. The impeller rotation speed; the sensing system includes a phase array probe group and an imaging processor. The phase array probe group is used to collect sensing position parameters of the concrete and / or reinforcing bars below the nozzle when it is working. The imaging processor is used to reconstruct the position of the concrete and / or reinforcing bars below the nozzle when it is working based on the sensing position parameters. The phase array probe group is installed behind the nozzle in the direction of travel and at intervals of 5-20cm. The scanning area of ​​the phase array probe group at least covers the spray area of ​​the nozzle. The spray area of ​​the nozzle refers to the concrete contact surface area swept by the jet flow of the nozzle.

[0009] In some alternative embodiments, the phase array probe group includes multiple independent probes, each independent probe including a housing and a scanning component and a communication component disposed within the housing. The scanning component is used to detect the sensed position parameters, and the communication component is used to convert the sensed position parameters into electrical signal parameters and send them to the main controller of the phase array probe group. The main controller is used to selectively process the electrical signal parameters sent by different communication components.

[0010] In some alternative embodiments, a plurality of the individual probes are arranged in a rectangular array, wherein the individual probes located at the edges of the rectangular array are rotatably connected to the housing via a rotary joint, so that the scanning direction of the individual probes can be deflected.

[0011] Secondly, a method for widening a main beam based on water-jet cutting, using the aforementioned water-jet cutting equipment, includes the following steps:

[0012] Preliminary cutting: The impeller speed of the jet pump is controlled by the jet flow control component, and the jet flow formed by the nozzle performs the initial cutting on the concrete and / or reinforcing steel. Concrete fracture marks are formed on the concrete contact surface swept by the jet flow. The position of the concrete fracture marks and the concrete and / or reinforcing steel on both sides is restored and imaged by the sensing system to obtain the initial cutting image. The concrete fracture marks refer to the grooves formed on the concrete surface after being cut by the jet flow. At this time, the concrete has not been completely cut off.

[0013] Recutting: The impeller speed of the jet pump is adjusted using the jet flow control component, and the jet flow formed by the nozzle is used to cut the concrete and / or steel bars again, cutting the concrete fracture into a concrete cross-section. The position of the concrete cross-section and the concrete and / or steel bars on both sides is restored and imaged using the sensing system to obtain a recutting image. The concrete cross-section refers to the fracture surface formed on the concrete surface after being cut by the jet flow, at which point the concrete is completely cut off.

[0014] Precise cutting: The impeller speed of the jet pump is further adjusted by the jet flow control component, and the jet flow formed by the nozzle is used to cut and smooth the concrete and / or steel bars, so as to flatten the concrete cross-section and form a flat concrete surface. The position of the flat concrete surface and the concrete and / or steel bars on both sides is restored and imaged by the sensing system to obtain a precise cutting image.

[0015] Rebar status identification: The initial cut image, the recut image, and the fine cut image are compared sequentially to obtain the position coordinates of all identified rebars in the three images. The position change parameters of each rebar in the three images are determined, and the rebar stability coefficient is determined based on the position change parameters.

[0016] Width-splitting welding: The welding method is matched with the stability coefficient of each steel bar, and a welding strategy is formed according to all types of welding methods to carry out the main beam width-splitting operation. The welding method includes at least one of the following: offset adjustment welding method, new steel bar welding method, and node plate expansion method.

[0017] In some optional embodiments, in the step of identifying the state of the reinforcing bars, determining the positional change parameters of each reinforcing bar in three consecutive images, and determining the reinforcing bar stability coefficient based on these positional change parameters, includes the following steps: comparing the initial cut image with the recut image to determine the first positional change parameters of each reinforcing bar in the two images; determining a first adjustment ratio based on all the first positional change parameters, wherein the first positional change parameters refer to the coordinate position change parameters of the reinforcing bar after the free end shifts during the initial cut and the recut; comparing the recut image with the fine cut image to determine the last positional change parameters of each reinforcing bar in the two images; determining a second adjustment ratio based on all the last positional change parameters, wherein the second adjustment ratio is greater than the first adjustment ratio; wherein the last positional change parameters refer to the coordinate position change parameters of the reinforcing bar after the free end shifts during the recut and the fine cut; determining a basic stability coefficient based on the number of reinforcing bar positional changes during the recut and the fine cut; and calculating the reinforcing bar stability coefficient by combining the first adjustment ratio, the second adjustment ratio, and the basic stability coefficient.

[0018] In some optional embodiments, the method further includes the step of adjusting the first adjustment ratio and / or the second adjustment ratio: comparing the initial position change parameters and the final position change parameters of the same reinforcing bar to obtain a comparison result of the change difference of a single reinforcing bar, and adjusting the first adjustment ratio and / or the second adjustment ratio according to the comparison result of the change difference of all reinforcing bars, wherein the comparison result of the change difference refers to the result of comparing the degree of change of the single reinforcing bar during the process from initial cutting to re-cutting and from re-cutting to precise cutting.

[0019] In some optional embodiments, continuing to adjust the impeller speed of the jet pump during the precision cutting process includes the following steps: determining a basic range for adjusting the jet pump speed during the precision cutting process; comparing all initial position change parameters with preset values ​​in the result of comparing the initial cutting image and the recutting image, determining the adjustment range of the speed based on the number of initial position change parameters exceeding the preset value, and combining the adjustment range with the basic range to drive the jet flow control component to continue adjusting the impeller speed of the jet pump.

[0020] In some optional implementations, determining the adjustment range of the rotational speed based on the number of initial position change parameters exceeding a preset value specifically includes the following steps: determining a basic interval of the adjustment range based on the average value among all initial position change parameters, and adjusting the values ​​at both ends of the basic interval based on the maximum value among all initial position change parameters.

[0021] In some optional implementations, the welding strategy is formed by matching the stability coefficient of each rebar with its respective welding method and considering all types of welding methods, including the following steps: determining the stability coefficient of all rebars; tentatively determining the welding method corresponding to each rebar based on the value of the stability coefficient; counting the number of each type of welding method; determining the main welding mode to be executed based on the type of welding method with the most quantity; determining the preferred welding mode to be executed based on the difference in the number of various welding mode types; determining the construction area sequence based on the distribution of the welding mode types corresponding to all rebars; and forming the welding strategy by combining the main welding mode, the preferred welding mode, and the construction area sequence.

[0022] In some alternative implementations, during the process of determining the distribution of welding method types corresponding to all reinforcing bars, areas with three or more welding method types in a unit span are screened, and the welding mode of the area is re-determined to form the welding strategy; wherein, the unit span refers to the smallest construction unit interval obtained by dividing the entire construction distance into multiple segments.

[0023] The beneficial effects of the embodiments of the present invention are:

[0024] The waterjet cutting equipment provided in this embodiment of the invention, by configuring a jetting mechanism, can adjust the impeller speed of the jet pump at any time using the jet flow control component, change the jet flow rate, and increase or decrease the jetting pressure as needed, ensuring that the basic conditions for cutting concrete are met while also ensuring the integrity of the reinforcing steel. At the same time, in conjunction with the sensing system, it can collect data and reconstruct images of the position of the concrete and / or reinforcing steel after waterjet cutting, which can facilitate the background to grasp the overall real-time shape of the reinforcing steel and provide data reference for subsequent construction operations.

[0025] The water-cutting-based main beam widening construction method provided in this invention utilizes the aforementioned water-cutting equipment to cut the concrete bridge deck multiple times. By forming a fracture mark-section-flat surface sequentially, the method ensures that the concrete is cut off while maintaining the integrity of the reinforcing steel. Simultaneously, the positional data of the concrete and / or reinforcing steel collected after each cut serves as one of the bases for adjusting the impeller speed. Furthermore, by continuously monitoring changes in the position or shape of the reinforcing steel, the method provides a construction strategy reference for the welding of the reinforcing steel in subsequent widening operations, ensuring the operational compatibility of the reinforcing steel welding construction.

[0026] Overall, the waterjet cutting equipment and the waterjet-based main beam widening construction method provided by the embodiments of the present invention, by considering real-time adjustment of jet flow rate control on the basis of traditional waterjet cutting, and supplemented by data sensing function of rebar position and shape, provide better structural foundation conditions and operation reference strategies for subsequent main beam widening welding construction. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of a waterjet cutting device provided in an embodiment of the present invention;

[0029] Figure 2 A flowchart of the main steps of the construction method provided in the embodiments of the present invention;

[0030] Figure 3 for Figure 2 The flowchart shows one of the main steps, S400.

[0031] Figure 4 for Figure 2 The flowchart shows one of the main steps, S500.

[0032] Icons: 1-Traveling mechanism; 2-Water supply mechanism; 21-Intermediate water storage tank; 22-Transportation channel; 23-Water supply source; 3-Spraying mechanism; 31-Spray pump; 32-Spray head; 4-Sensing system. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0036] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0037] Furthermore, the terms "parallel" and "perpendicular" do not imply that components must be absolutely parallel or perpendicular, but rather that they can be slightly tilted. For example, "parallel" simply means that its direction is more parallel than "perpendicular," not that the structure must be perfectly parallel, but that it can be slightly tilted.

[0038] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0039] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] Example

[0041] In arid desert regions, many transportation facilities face the challenge of upgrading. In bridge widening projects, it is necessary to cut the concrete edges of old bridges, retain the pre-installed steel bars, and then widen them laterally (subsequent processes include pile foundation construction, welding of steel reinforcement cages, and concrete pouring). To avoid dust pollution, noise pollution, and excessive cutting vibration during the concrete cutting process, we introduced waterjet cutting technology. This not only improves cutting efficiency and reduces energy consumption, but also produces less dust and makes vibration more controllable. During waterjet cutting, high-pressure water jets directly cut and remove concrete. This process not only creates high-pressure jetting force on the concrete but also on the embedded reinforcing bars after the surface concrete is removed. Often, after the concrete is cut, the internal reinforcing bars are deformed to varying degrees, and in severe cases, they may even loosen or fall off. The previous solution to this problem was to cut off the severely deformed and loose reinforcing bars, re-weld them to the standard welds, and then weld them to the reinforcing bars that need to be welded during the subsequent widening process. This process increases material costs and lengthens the construction period. Therefore, it is necessary to consider how to ensure the effective removal of concrete and the complete preservation of the reinforcing bars during waterjet cutting.

[0042] To address the aforementioned issues, the initial concept proposed was to perform multiple cuts, ensuring sufficient spray pressure at the point of cut to the reinforcing steel to minimize deformation. This necessitates more precise control over the spray pressure. Furthermore, the state of the reinforced concrete after each cut needs to be monitored concurrently to facilitate the setting of parameters and methods for the next cut, thereby better preserving the integrity of the reinforcing steel. To this end, this embodiment provides a waterjet cutting device and a waterjet-based method for widening the main beam. By possessing waterjet pressure control capabilities and real-time acquisition of reinforced concrete position parameters, it provides structural conditions and data support for multiple cutting operations and subsequent widening and welding of the reinforcing steel.

[0043] Please refer to the details. Figure 1This embodiment provides a waterjet cutting device including a traveling mechanism 1, a water supply mechanism 2, a jetting mechanism 3, and a sensing system 4. The traveling mechanism 1 is used to travel on the main beam, and can be either a tracked vehicle or a flat-ground tracked vehicle, mainly to be able to travel smoothly in a straight line on the main beam. The traveling mechanism 1 is equipped with a tracking device (generally composed of three parts: a sensor for detecting path markings, a control unit for processing signals, and an actuator for adjusting the direction of movement). The tracking device is installed on the front side of the chassis in the direction of travel of the traveling mechanism 1, and is used to track according to the planned path, guiding the traveling mechanism 1 to travel on one side of the main beam according to the planned path.

[0044] The water supply mechanism 2 includes a central water storage tank 21 and a conveying channel 22 connected to the outlet of the central water storage tank 21. The central water storage tank 21 is used to connect to the water supply source 23. The central water storage tank 21 serves as a water transfer station, connecting to the water supply source 23 (external water pipe) to continuously supply water flow. On the other hand, it serves as a pumping pool, providing a space for pump suction to facilitate the concentrated flow of water into the conveying pipeline.

[0045] The spraying mechanism 3 includes a nozzle 32, a spray pump 31, and a spray flow control component. It should be noted that, to ensure smooth movement, the spraying mechanism 3 is generally positioned on one side of the traveling mechanism 1 at a certain interval, reducing the impact of the sprayed water flow on the traveling mechanism 1 while ensuring its safe operation. The inlet of the spray pump 31 is connected to the conveying channel 22 to pressurize it. The nozzle 32 is connected to the outlet of the spray pump 31 to spray high-pressure water, thereby performing spray cutting on concrete and / or reinforcing steel (i.e., water cutting of the concrete containing embedded reinforcing steel on the side of the main beam). The spray flow control component is used to adjust the impeller speed of the spray pump. Installed inside the spray pump 31, the spray flow control component serves as one of the control sources for the motor drive, enabling real-time control of the impeller speed.

[0046] The sensing system 4 includes a phase array probe group and an imaging processor. The phase array probe group is used to acquire the sensing position parameters of the concrete and / or reinforcing steel below the nozzle 32 when it is working. That is, the phase array probe group can acquire its position or coordinate parameters (i.e., sensing position parameters) in real time by exploring the state of the cut concrete and reinforcing steel below the nozzle 32. The imaging processor is used to reconstruct the position of the concrete and / or reinforcing steel below the nozzle 32 based on the sensing position parameters. That is, the imaging processor reconstructs the coordinate position state of the concrete and / or reinforcing steel based on the received sensing position parameters (for example, by using multi-probe collaborative scanning positioning technology and real-time signal-image mapping algorithm).

[0047] The phase array probe group emits a detection beam (such as ultrasonic / electromagnetic waves) and receives the reflected echo signals from the concrete and steel bars below (which may be concrete, steel bars, or both) in real time, converting them into position coordinate data. The imaging processor then uses a 3D point cloud reconstruction algorithm based on the signal time difference and intensity difference to convert the coordinate data into a visualized cross-sectional image, realizing dynamic monitoring of the steel bar distribution and concrete condition. Compared with the previous pure water cutting method, this method adds real-time scanning of the cutting state, which can provide basic data reference for accurate and appropriate cutting in multiple cutting operations.

[0048] Furthermore, to ensure the integrity and clarity of real-time scanning, the phase array probe group is installed behind the nozzle 32 in the direction of travel and spaced 5-20cm apart (the spacing is to avoid excessive splashing of dust and water droplets, which would affect the accuracy of data scanning). The scanning area of ​​the phase array probe group at least covers the spray area of ​​the nozzle, which refers to the concrete contact surface area swept by the spray flow of the nozzle; that is, the scanning area should be wider than the area swept by the spray flow, so as to scan the entire area of ​​the spray point and its surroundings.

[0049] Through the above technical solution, the spraying mechanism 3 and the sensing system 4 are integrated. While accurately cutting concrete and / or steel bars, the phase array probe group dynamically scans the cutting surface and its surrounding environment and generates a three-dimensional point cloud image, realizing the visualization monitoring of the construction process. It can provide the basis for adjusting the cutting flow rate and the real-time status of the steel bars after cutting. It can not only effectively avoid the steel bar damage or insufficient stability caused by blind cutting in traditional methods, but also provide a construction strategy reference for steel bar welding in subsequent widening operations, ensuring the operational compatibility of steel bar welding construction.

[0050] Furthermore, to enhance the adaptability of the phase array probe group—that is, to enable complete and focused scanning of different spray area shapes—the phase array probe group specifically comprises multiple independent probes. Each independent probe includes a housing and a scanning component and a communication component housed within the housing. The scanning component detects the sensed position parameters, and the communication component converts these parameters into electrical signals and sends them to the central controller of the phase array probe group. The central controller selectively processes the electrical signals from different communication components, meaning it can choose to process and respond to data from individual probes. By combining multiple independent probes with their own scanning and communication components into an expandable array, the central controller coordinates the working states of each probe, enabling dynamic focusing adjustment of the scanning range and shape, thereby precisely adapting to the real-time imaging needs of different spray area shapes.

[0051] Based on the above technical solution, in order to further enhance the adaptability of the independent probe, in this embodiment, multiple independent probes are arranged in a rectangular array, such as 6x8 or 8x8. The independent probes located at the edge (i.e. the outermost ring) of the rectangular array are rotatably connected to the housing through a rotating joint, so that the scanning direction of the independent probe can be deflected, thereby realizing deflection scanning in a non-vertical position, expanding the range of the scanning area, and increasing the multi-condition adaptability of the independent probe while maintaining the stability of the array structure.

[0052] This embodiment also provides a main beam widening construction method based on water-jet cutting, using the water-jet cutting equipment described in the above embodiments. Please refer to [link to relevant documentation]. Figure 2 The method includes the following steps:

[0053] S100: Preliminary Cutting: The impeller speed of the jet pump 31 is controlled by the jet flow control component, and the jet flow formed by the nozzle 32 performs an initial cut on the concrete and / or reinforcing steel. A concrete fracture mark is formed on the concrete contact surface swept by the jet flow. The sensing system 4 restores the position of the concrete fracture mark and the concrete and / or reinforcing steel on both sides to obtain an initial cut image. This step indicates that the impeller speed is initially set to perform an initial cut on the concrete and / or reinforcing steel of the part to be cut on the side of the main beam. This initial cut does not require the complete removal of the concrete; it is sufficient to form a preliminary concrete fracture mark. The concrete fracture mark refers to the groove formed on the concrete surface after being cut by the jet flow. At this time, the concrete has not been completely cut off.

[0054] During the initial cutting process, the phase array probe group and imaging processor of the sensing system 4 work synchronously. They continuously scan and collect the sensing position parameters of concrete and / or reinforcing bars above the concrete fracture formed after cutting. The imaging processor then reconstructs the image of the concrete fracture and the position of the concrete and / or reinforcing bars on both sides (the scanning area is larger than the spraying area, which can collect the position parameters of the concrete fracture and the concrete and reinforcing bars on both sides). The data of this reconstruction image is recorded as the initial cutting image.

[0055] S200: Recutting: The impeller speed of the jet pump 31 is adjusted using the jet flow control component, and the jet flow formed by the nozzle 32 is used to cut the concrete and / or reinforcing steel again, cutting the concrete fracture into a concrete cross-section. The position of the concrete cross-section and the concrete and / or reinforcing steel on both sides is restored and imaged using the sensing system 4 to obtain a recutting image. This step means changing the impeller speed of the jet pump 31, which is generally greater than the impeller speed of the initial cut, so that the concrete fracture can be cut again to form a concrete cross-section (this recutting can be unidirectional cutting or multiple back-and-forth cutting, the purpose of which is to cut the concrete fracture into a concrete cross-section). The concrete cross-section refers to the fracture surface formed on the concrete surface after being cut by the jet flow, at which point the concrete is completely cut off.

[0056] During the recutting process, the phase array probe group and imaging processor of the sensing system 4 continue to work synchronously to collect the sensing position parameters of the concrete section and the concrete and / or steel bars on both sides again (at this time, the concrete has basically fallen off, and the main focus is on scanning the remaining steel bars and the concrete section inside the cut). The imaging processor can then restore the position of the concrete section and the concrete and / or steel bars on both sides to form an image. The data of this restored image is recorded as the recutting image.

[0057] S300: Precision Cutting: The impeller speed of the jet pump 31 is further adjusted using the jet flow control component. The jet flow formed by the nozzle 32 is used to smooth and cut the concrete and / or reinforcing bars, flattening the concrete cross-section to form a flat concrete surface. The sensing system 4 is used to reconstruct and image the position of the flat concrete surface and the concrete and / or reinforcing bars on both sides, obtaining a precision cutting image. This step indicates that the impeller speed of the jet pump 31 is further adjusted. The impeller speed at this time can be greater than or less than the impeller speed in the next cutting process. The purpose is to flatten the uneven surface of the concrete cross-section. This may require a larger jet pressure or may be achieved with a smaller jet pressure.

[0058] During the precise cutting process, the phase array probe group and imaging processor of the sensing system 4 work synchronously to collect the sensing position parameters of the concrete and / or steel bars on the concrete flat surface and its two sides (mainly the free ends of the steel bars on the outer side and the connection points between the concrete and steel bars on the inner side). The imaging processor can then restore the position of the concrete flat surface and the concrete and / or steel bars on its two sides. The data of this restored imaging is recorded as the precision cutting image.

[0059] S400: Identify Rebar Status: The initial cut image, the recut image, and the fine cut image are compared sequentially to obtain the position coordinates of all identified rebars in the three images. The position change parameter of each rebar in the three images is determined, and the rebar stability coefficient is determined based on the position change parameter. This step means that the three cut images (i.e., initial cut image, recut image, and fine cut image) obtained by the imaging processor are compared pairwise. The position coordinates of all identifiable rebars in the initial cut image and the recut image, as well as the position coordinates of all identifiable rebars in the recut image and the fine cut image, are determined respectively. The degree of change of the position coordinates of the same rebar in these three images is identified, that is, the position change parameter of the same rebar after the three changes is determined (this position change parameter can be the combined calculation value of the two comparison results, or the calculation value of the result of the comparison of two of them). The deformation change amount of the rebar during multiple cuts is obtained, that is, the position change parameter (which can be the overall displacement parameter or the local displacement parameter). The rebar stability coefficient is calculated using this position change parameter as an evaluation of the stability status index of each rebar during multiple cuts.

[0060] S500: Widing and Welding: This step involves matching the stability coefficient of each rebar with its corresponding welding method, and formulating a welding strategy based on all welding methods to widen the main beam. Specifically, this involves numerically judging the stability coefficients of the identified rebars and selecting a welding method based on their stability characteristics. The welding methods include at least one of the following: offset adjustment welding (a welding method that adjusts and restores the degree of offset after slight offset), new rebar welding (a method of welding a new section of rebar to moderately deformed rebars), and node plate expansion (a welding method that connects severely deformed or detached rebar groups by welding a precast node plate with multiple holes to the end of the old rebar). Then, by statistically analyzing the welding method types of all rebars, a final welding strategy is formulated to assist in completing the main beam widening operation, reducing the complexity and instability of the final construction work.

[0061] By employing the above technical solution, which utilizes staged water cutting combined with three real-time imaging comparisons, the positional changes of each rebar are dynamically tracked and its stability coefficient is calculated. Based on this, welding strategies (such as offset adjustment, adding rebar, and node plate expansion methods) are matched. This not only reduces the risk of large rebar deformation caused by a single cutting, but also effectively avoids the risk of rebar damage caused by traditional blind cutting while ensuring precise connection between the old and new bridge structures. This can improve the structural safety and construction controllability of the main beam widening project.

[0062] In this embodiment, to determine the rationality of the steel reinforcement stability coefficient, it can be represented by a combined calculation value based on two comparison results. Please refer to [link / reference] for details. Figure 3Determining the positional change parameters of each rebar in three consecutive images, and then determining the rebar stability coefficient based on these positional change parameters, involves the following steps:

[0063] S410: Compare the initial cut image with the recut image to determine the first position change parameter of each rebar in the two images, and determine a first adjustment ratio based on all the first position change parameters. This step means comparing the initial cut image obtained from the first round of initial cutting and the recut image from the second round of recutting, and determining the first position change parameter of each (identified) rebar in the two images. The first position change parameter refers to the coordinate position change parameter of the rebar after the free end is displaced in the initial cutting and recutting. That is, by determining the displacement of the free end of the rebar (the end that is far from the inside of the cutting surface and also the end that is far from the main beam), the coordinate change value of the free end is obtained (e.g., represented by the spatial distance value) as the first position change parameter, and a first adjustment ratio (e.g., percentage or coefficient) is determined based on the specific value of the first position change parameter.

[0064] S420: Compare the recutting image with the precision cutting image to determine the final position change parameter of each rebar in the two images. Determine a second adjustment ratio based on all final position change parameters. The second adjustment ratio is greater than the first adjustment ratio. The final position change parameter refers to the coordinate position change parameter of the rebar after the free end shifts during the recutting and precision cutting. This step means comparing the recutting image obtained from the second round of recutting and the third round of precision cutting with the precision cutting image to determine the final position change parameter of each (identified) rebar in the two images. The final position change parameter refers to the coordinate position change parameter of the rebar after the free end shifts during the recutting and precision cutting. That is, by determining the subsequent shift of the free end of the rebar (the end that is far from the inside of the cutting surface and also the end that is far from the main beam), the coordinate change value of the free end is obtained (e.g., represented by a spatial distance value) as the final position change parameter. A second adjustment ratio (e.g., a percentage or a coefficient) is determined based on the specific value of the final position change parameter. Furthermore, the second adjustment ratio should be greater than the first adjustment ratio because the deformation or loosening of the reinforcing bar during the subsequent cutting process has a greater impact on the stability of the reinforcing bar (the rotation speed during the subsequent cutting process is generally greater than that during the initial cutting), so the second adjustment ratio needs to have a greater weight.

[0065] S430: Determine the basic stability coefficient based on the number of rebar position changes during the recutting and precise cutting processes. Combine the first adjustment ratio, the second adjustment ratio, and the basic stability coefficient to calculate the rebar stability coefficient. This step involves first identifying the specific number of times the rebar's free end shifts (i.e., rebar position changes) occurs during the two rounds of cutting (recutting and precise cutting), and determining a basic stability coefficient based on this number. In principle, the more times the rebar shifts, the worse the stability (the smaller the value), and vice versa. It should be noted that the basic stability coefficient can be an empirical value or an iterative value continuously optimized based on historical data. The purpose is to characterize the stability of the rebar under different quantity changes. Then, the first adjustment ratio, the second adjustment ratio, and the basic stability coefficient are used to calculate the rebar stability coefficient. The calculation method can be to sequentially increase or decrease the first and second adjustment ratios on the basic stability coefficient, or it can be based on the product of the first adjustment ratio and the basic stability coefficient, the product of the second adjustment ratio and the basic stability coefficient, and the average value of the basic stability coefficient itself. The purpose is to integrate the first and second adjustment ratios into the basic stability coefficient to achieve dynamic characterization.

[0066] The above technical solution utilizes phased quantitative evaluation (comparison of two rounds of images), calculates differentiated first and second adjustment ratios (the latter having a larger weight) based on the free end displacement parameters of the reinforcing bars, and determines the foundation stability coefficient based on the frequency of reinforcing bar displacement. Finally, the three data are dynamically integrated to generate the reinforcing bar stability coefficient, which can evaluate the changes in the state of the reinforcing bars under disturbance during dynamic operation, thereby providing reliable data support for subsequent precise matching of welding strategies.

[0067] Since the first and second adjustment ratios are empirical values, they need to be optimized (iterated) to more accurately represent the calculated results of the steel reinforcement stability coefficient. This optimization can be based on whether the initial or final change in the positional parameter is larger (a larger change indicates a greater impact on stability). Please refer to [link / reference needed]. Figure 3 It also includes the step of adjusting the first adjustment ratio and / or the second adjustment ratio:

[0068] S440: Compare the initial and final position change parameters of the same reinforcing bar to obtain the comparison result of the variation difference of a single reinforcing bar. Adjust the first adjustment ratio and / or the second adjustment ratio according to the comparison result of the variation difference of all reinforcing bars. This step means that after calculating the initial and final position change parameters for each reinforcing bar, the two values ​​are compared to determine which round of cutting comparison the displacement deformation of the reinforcing bar is more severe. The more severe deformation should have a larger weight when participating in the calculation of the reinforcing bar stability coefficient. That is, adjust at least one of the first and second adjustment ratios according to the comparison result of the variation difference of a single reinforcing bar (the adjustment method can be set as needed, generally only one needs to be adjusted). The comparison result of the variation difference refers to the result of comparing the degree of change of the single reinforcing bar during the initial cutting to the second cutting process and during the second cutting to the precise cutting process.

[0069] The above technical solution introduces a dynamic analysis mechanism for the displacement of a single rebar. This mechanism directly compares the differences in the changes of each rebar during the initial-recutting and recutting-finishing stages to identify the stage most sensitive to deformation. Based on this, the weight distribution of the first adjustment ratio and / or the second adjustment ratio is adjusted in real time, so that the empirical value is iterated into a dynamic parameter that accurately reflects the disturbance response of the individual rebar, thereby improving the matching degree between the subsequent rebar stability coefficient and the actual structural state.

[0070] By linking the calculation method / logic of the rebar stability coefficient with the dynamic situation in the two-round cutting comparison, it can be ensured that the final rebar stability coefficient calculation result is more in line with the actual situation and has dynamic adaptability. On this basis, in order to make the injection pressure (i.e., the impeller speed of the injection pump) also adaptively adjusted according to the dynamic cutting process, instead of using the traditional single fixed value adjustment method, in this embodiment, the impeller speed of the injection pump is further adjusted during the precise cutting process, including the following steps:

[0071] Determine the basic range for adjusting the speed of the jet pump 31 during the precision cutting process; that is, determine in advance the basic range of the impeller speed of the jet pump 31 that should be set during the precision cutting process (generally given based on parameters measured in advance, such as concrete hardness and thickness), and make dynamic adjustments based on this.

[0072] Then, in the comparison between the initial cut image and the recut image, all the initial position change parameters are compared with the preset values. This means that since the initial cut and recut can be calculated, the larger the initial position change parameter, the greater the difference in impeller speed between the initial cut and the recut, causing a greater degree of deformation or loosening of the reinforcing steel. Therefore, it is necessary to make the impeller speed of the precise cut more gentle relative to the original set value. All the initial position change parameters can be compared with the preset values ​​(pre-determined empirical values) respectively. Based on the comparison results, the above-mentioned basic range is readjusted. That is, the speed adjustment range is determined according to the number of initial position change parameters exceeding the preset value. This adjustment range is combined with the basic range (for example, by using a combination of interval addition and subtraction) to drive the jet flow control component to continue to adjust the impeller speed of the jet pump 31.

[0073] By analyzing the deviation scale of all initial position change parameters and preset values ​​in the initial-secondary cutting stages, the basic range of impeller speed in the fine cutting stage is dynamically corrected, so that the high-pressure water jet intensity can be adapted to the deformation of the steel structure in real time, which can ensure the flatness of the concrete section and suppress the secondary disturbance of the steel bars to the greatest extent.

[0074] Based on the above technical solution, determining the adjustment range is related to the range of impeller speed values ​​in the final precise cutting. In order to better adapt to the typical characteristics and common features of all reinforcing bars, it is necessary to consider the distribution characteristics of all initial position change parameters to determine the adjustment range. Specifically, determining the speed adjustment range based on the number of initial position change parameters exceeding the preset value includes the following steps:

[0075] The basic interval of the adjustment range is determined based on the mean of all initial position change parameters. The endpoints of this basic interval are then adjusted based on the maximum values ​​of all initial position change parameters. This means that the common characteristics are represented by the mean of all initial position change parameters, and the basic interval is determined as the range of values ​​for the adjustment range. The span of the basic interval is then adjusted based on the maximum value (the most unstable degree) of all initial position change parameters, which determines the endpoints of the basic interval. This allows the typical characteristics of all rebar deformations to be highlighted by combining extreme value cases, thus determining the adjustment range.

[0076] The above technical solution uses the mean value of all initial position change parameters to lock the common deformation trend and determine the basic interval (adjustment range). Then, the maximum value is used to expand or shrink the interval boundary in both directions (to prevent extreme disturbance risk upward and to retain flexible cutting space downward), so that the adjustment range not only covers the typical characteristics of the group of steel bars, but also actively adapts to the protection needs of the largest deformation individual.

[0077] Furthermore, by considering the dynamic calculation of the steel reinforcement stability coefficient and the dynamic adjustment of the impeller speed, and with data references and a solid practical foundation, it is possible to more accurately select the welding method for each steel reinforcement, thereby forming a more suitable welding strategy. Please refer to [link / reference] for details. Figure 4 The welding strategy, which combines the stability coefficient of each rebar with its corresponding welding method, and is formulated based on all types of welding methods, includes the following steps:

[0078] S510: Determine the stability coefficient of all reinforcing bars and tentatively determine the welding method corresponding to each reinforcing bar based on the value of the stability coefficient; this step means that by collecting the stability coefficient of all (identified) reinforcing bars, the welding method of each bar is determined according to the magnitude of all stability coefficients (for example, the larger the coefficient, the more direct welding or offset adjustment welding method is used; the relatively smaller coefficient is used to add a new reinforcing bar welding method; the smaller the coefficient, the more node plate extension method is used, etc.).

[0079] S520: Count the number of each type of welding method and determine the primary welding mode based on the type with the most quantity. This step means that by counting the total number of all welding method types, the one with the most quantity is determined as the primary operation method of this welding strategy, i.e., the primary welding mode. Then proceed to step S530: Determine the secondary welding mode based on the difference in the number of each type of welding method. This step means that by determining the difference in the number of each type of welding method, the secondary operation method is determined. For example, if the difference in the number of cuts between the offset adjustment welding method and the new rebar welding method is 50, and the difference in the number of cuts between the new rebar welding method and the node plate expansion method is 30, then the offset adjustment welding method is the primary operation method, the new rebar welding method is the secondary welding mode, and the node plate expansion method may become an occasional welding mode.

[0080] S540: Determine the construction area sequence based on the distribution of welding method types corresponding to all reinforcing bars. This step involves confirming the distribution location of the welding method type for each reinforcing bar. For example, the positions of reinforcing bars using the offset adjustment welding method are positions 1, 2, 3, and 5. The areas requiring construction are determined based on their distribution, facilitating the direct positioning of reinforcing bars with different degrees of deformation. The processing priority is determined based on the severity of deformation (generally, the most severe deformation is treated first, but this also depends on the on-site construction environment; this embodiment only provides some possible approaches). Finally, step S550: Combine the main welding mode, the preferred welding mode, and the construction area sequence to form the welding strategy. This means that the final welding operation plan (welding strategy) is formed by the approximate welding methods, construction locations, and corresponding construction sequences determined in each step.

[0081] Through the above technical solution, after determining the welding method based on the stability coefficient, the execution welding mode hierarchy (main execution welding mode + secondary execution welding mode) is established according to the quantity statistics. The construction area sequence is dynamically planned by integrating the spatial distribution characteristics of the steel bar positions with different stability levels. This makes the welding strategy have the characteristics of precise process adaptation, efficient resource scheduling (reducing process switching losses) and forward-looking risk management (prioritizing the treatment of severely deformed areas).

[0082] Based on the above technical solutions, the deformation or loosening of reinforcing bars may exhibit a non-concentrated distribution (generally, they are regularly distributed when the cutting pattern does not change abruptly), meaning they may be scattered. For example, multiple reinforcing bars within one meter may be slightly deformed, severely deformed, or even about to detach. This special case needs to be considered. Specifically, in determining the distribution of welding method types for all reinforcing bars, areas with three or more welding method types within a unit span are screened. This unit span refers to the smallest construction unit interval obtained by dividing the entire construction distance into multiple segments (e.g., if divided equally into one-meter segments, then the smallest construction unit interval is one meter). After identifying this area, the welding mode is re-determined to form a welding strategy. It should be noted that the re-determined welding mode can be a combination or optimization of the offset adjustment welding method, the new reinforcing bar welding method, and the node plate expansion method, depending on the specific working conditions. Through the aforementioned technical solutions, the mixed density of welding method types within a unit span is detected in real time, abnormally scattered areas are selected or identified, and a customized mixed welding mode is dynamically switched. Local differences are considered while retaining the hierarchy of the executed welding mode to improve adaptability to complex working conditions.

[0083] Based on the above technical solutions, this embodiment can further consider the adaptive optimization direction of waterjet cutting parameters. By constructing a deep learning model, cutting parameters can be predicted and dynamically adjusted in real time. Specifically, impeller speed, concrete strength, rebar distribution density, multi-stage cutting image data and corresponding cutting effect evaluation indicators from historical cutting construction are collected, and a cutting parameter optimization model is obtained by training a deep convolutional neural network. In real-time construction, the initial cutting image, re-cutting image, environmental parameters and initial value of rebar stability coefficient of the current cutting stage are input into the model, and the impeller speed adjustment amount, cutting path optimization sequence and welding strategy pre-adjustment scheme are output in real time. At the same time, the model parameters are calibrated online according to the actual position change data of rebar fed back by the fine cutting image, forming an intelligent closed-loop control of cutting-imaging-evaluation-adjustment, thereby significantly improving cutting accuracy, reducing secondary disturbance of rebar and optimizing welding resource scheduling efficiency in a variable construction environment.

[0084] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the scope of protection of the invention. It should be noted that the structures or components illustrated in the accompanying drawings are not necessarily drawn to scale, and descriptions of well-known components, processing techniques, and processes have been omitted to avoid unnecessarily limiting the invention.

Claims

1. A waterjet cutting device, characterized in that, include: A traveling mechanism, wherein the traveling mechanism is equipped with a tracking device, the tracking device being used to track according to a planned path; A water supply system, comprising a central water storage tank and a conveying channel connected to the outlet of the central water storage tank, wherein the central water storage tank is used to connect to a water supply source; The spraying mechanism includes a nozzle, a spray pump, and a spray flow control assembly. The inlet of the spray pump is connected to the delivery channel, the nozzle is connected to the outlet of the spray pump, and the nozzle is used to spray and cut concrete and / or reinforcing bars. The spray flow control assembly is used to adjust the impeller speed of the spray pump. as well as The sensing system includes a phase array probe group and an imaging processor. The phase array probe group is used to acquire sensing position parameters of the concrete and / or reinforcing bars below the nozzle when it is working. The imaging processor is used to reconstruct the position of the concrete and / or reinforcing bars below the nozzle when it is working based on the sensing position parameters. The phase array probe group is installed behind the nozzle in the direction of travel and at intervals of 5-20cm. The scanning area of ​​the phase array probe group at least covers the spraying area of ​​the nozzle, which refers to the concrete contact surface area swept by the spray flow of the nozzle.

2. The waterjet cutting equipment according to claim 1, characterized in that, The phase array probe group includes multiple independent probes. Each independent probe includes a housing and a scanning component and a communication component disposed within the housing. The scanning component is used to detect the sensed position parameters, and the communication component is used to convert the sensed position parameters into electrical signal parameters and send them to the main controller of the phase array probe group. The main controller is used to selectively process the electrical signal parameters sent by different communication components.

3. The waterjet cutting equipment according to claim 2, characterized in that, Multiple independent probes are arranged in a rectangular array. The independent probes located at the edges of the rectangular array are rotatably connected to the housing via a rotary joint, so that the scanning direction of the independent probes can be deflected.

4. A method for widening a main beam based on waterjet cutting, using the waterjet cutting equipment as described in any one of claims 1-3, the method comprising the following steps: Preliminary Cutting: The impeller speed of the jet pump is controlled by the jet flow control component, and the jet flow formed by the nozzle performs an initial cut on the concrete and / or reinforcing steel. A concrete fracture mark is formed on the concrete contact surface swept by the jet flow. The sensing system reconstructs and images the concrete fracture mark and the positions of the concrete and / or reinforcing steel on both sides to obtain the preliminary cut image. The concrete fracture marks refer to the grooves formed on the concrete surface after being cut by the jet stream, at which point the concrete is not completely cut off and removed. Recutting: The impeller speed of the jet pump is adjusted using the jet flow control component, and the jet flow formed by the nozzle is used to cut the concrete and / or steel bars again, cutting the concrete fracture into a concrete cross-section. The position of the concrete cross-section and the concrete and / or steel bars on both sides is restored and imaged using the sensing system to obtain a recutting image. The concrete cross-section refers to the fracture surface formed on the concrete surface after being cut by the jet flow, at which point the concrete is completely cut off. Precise cutting: The impeller speed of the jet pump is further adjusted by the jet flow control component, and the jet flow formed by the nozzle is used to cut and smooth the concrete and / or steel bars, so as to flatten the concrete cross-section and form a flat concrete surface. The position of the flat concrete surface and the concrete and / or steel bars on both sides is restored and imaged by the sensing system to obtain a precise cutting image. Rebar status identification: The initial cut image, the recut image, and the fine cut image are compared sequentially to obtain the position coordinates of all identified rebars in the three images. The position change parameters of each rebar in the three images are determined, and the rebar stability coefficient is determined based on the position change parameters. Width-splitting welding: The welding method is matched with the stability coefficient of each steel bar, and a welding strategy is formed according to all types of welding methods to carry out the main beam width-splitting operation. The welding method includes at least one of the following: offset adjustment welding method, new steel bar welding method, and node plate expansion method.

5. The main beam widening construction method based on waterjet cutting according to claim 4, characterized in that, In the step of identifying the state of the reinforcing bars, determining the positional change parameters of each reinforcing bar in the three consecutive images, and determining the stability coefficient of the reinforcing bars based on these positional change parameters, includes the following steps: The initial cutting image is compared with the recutting image to determine the first position change parameter of each rebar in the two images. The first adjustment ratio is determined based on all the first position change parameters. The first position change parameter refers to the coordinate position change parameter of the rebar after the free end is displaced in the initial cutting and recutting. The recutting image is compared with the fine cutting image to determine the final position change parameter of each rebar in the two images. A second adjustment ratio is determined based on all the final position change parameters. The second adjustment ratio is greater than the first adjustment ratio. The final position change parameter refers to the coordinate position change parameter of the rebar after the free end is displaced in the recutting and fine cutting. The foundation stability coefficient is determined based on the number of rebar position changes that occur during the recutting and precise cutting processes. The rebar stability coefficient is then calculated by combining the first adjustment ratio, the second adjustment ratio, and the foundation stability coefficient.

6. The main beam widening construction method based on waterjet cutting according to claim 5, characterized in that, It also includes the step of adjusting the first adjustment ratio and / or the second adjustment ratio: The initial and final positional change parameters of the same reinforcing bar are compared to obtain the variation difference comparison result of a single reinforcing bar. The first adjustment ratio and / or the second adjustment ratio are adjusted according to the variation difference comparison result of all reinforcing bars. The variation difference comparison result refers to the result of comparing the degree of change of the single reinforcing bar during the process from initial cutting to recutting and from recutting to precise cutting.

7. The main beam widening construction method based on waterjet cutting according to claim 5 or 6, characterized in that, The process of continuously adjusting the impeller speed of the jet pump during precise cutting includes the following steps: Determine the basic range for adjusting the jet pump speed during the precise cutting process; in the comparison results between the initial cutting image and the re-cutting image, compare all the initial position change parameters with the preset values ​​respectively, determine the speed adjustment range based on the number of initial position change parameters exceeding the preset values, and combine the adjustment range with the basic range to drive the jet flow control component to continue adjusting the impeller speed of the jet pump.

8. The main beam widening construction method based on waterjet cutting according to claim 7, characterized in that, The step of determining the speed adjustment range based on the number of first position change parameters exceeding a preset value specifically includes the following steps: determining the basic interval of the adjustment range based on the average value among all first position change parameters, and adjusting the values ​​at both ends of the basic interval based on the maximum value among all first position change parameters.

9. The main beam widening construction method based on waterjet cutting according to claim 4, characterized in that, The welding strategy, which combines the stability coefficient of each rebar with its corresponding welding method and forms a welding strategy based on all types of welding methods, includes the following steps: Determine the stability coefficient of all reinforcing bars, and tentatively determine the welding method corresponding to each reinforcing bar based on the value of the stability coefficient; count the number of each type of welding method, determine the main welding mode to be executed based on the type of welding mode with the most number, determine the welding mode to be emphasized based on the difference in the number of each type of welding method, determine the construction area sequence based on the distribution of the welding mode types corresponding to all reinforcing bars, and form the welding strategy by combining the main welding mode, the welding mode to be emphasized, and the construction area sequence.

10. The main beam widening construction method based on waterjet cutting according to claim 9, characterized in that, In the process of determining the distribution of welding method types for all reinforcing bars, areas with three or more welding method types in a unit span are screened, and the welding mode of the area is re-determined to form the welding strategy; wherein, the unit span refers to the smallest construction unit interval obtained by dividing the entire construction distance into multiple segments.

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