Method for pouring concrete into hollow steel pipe column

Abstract

This application provides a method for pouring concrete into a hollow steel tube column, comprising the following steps: The hollow tube to be poured is arranged at an angle, such that the axial direction of the hollow tube forms a preset angle with the horizontal plane, and the angle is towards the lower end of the hollow tube; the hollow tube is held in an inclined state by a fixing fixture; concrete is injected from a grouting port at the lower end of the hollow tube, so that the concrete continuously fills the hollow tube from bottom to top; during the concrete filling process, air and / or excess concrete are discharged from a grouting outlet at the higher end of the hollow tube; a monitoring system installed on the hollow tube is used to monitor the overflow status of the concrete in real time and provide feedback on the monitoring information, thereby improving the uniformity and density of concrete filling, simplifying construction organization, and achieving real-time monitoring and feedback control of the pouring process.

Description

Technical Field

[0001] This application relates to the technical field of building engineering, and in particular to a method for concrete pouring of hollow steel pipe columns. Background Technology

[0002] In projects requiring large-span, high-strength column support, such as wind turbine towers, high-rise buildings, or industrial plants, hollow steel tube concrete columns serve as core load-bearing components, and their casting quality directly affects the safety and durability of the overall structure.

[0003] Currently, the traditional method of pouring concrete for hollow steel pipe columns is mostly vertical. The specific process is as follows: First, the horizontally placed steel pipe column is vertically fixed to the construction position using hoisting equipment, and displacement is prevented during the pouring process by bottom support and lateral restraint fixtures; then, concrete is injected through the grouting port opened at the top of the steel pipe, while an air vent is set at the bottom to expel air; finally, after the concrete has initially set, the filling of the hollow steel pipe column is judged by observing the overflow status of the air vent.

[0004] However, it is difficult to balance the quality of pouring with the economy and controllability of construction. Specifically, during vertical pouring, the concrete is prone to aggregate segregation due to gravity, and insufficient venting leads to voids. In addition, it relies on large equipment, the tooling is not stable enough, and real-time visual monitoring cannot be achieved. Ultimately, this results in unstable quality of hollow pipe pouring, high construction costs, low efficiency, and difficulty in meeting the precision and safety requirements of engineering construction.

[0005] Therefore, there is an urgent need for a method for concrete pouring of hollow steel tube columns that can solve the above-mentioned technical defects and improve the pouring quality and construction efficiency. Summary of the Invention

[0006] This application provides a method for pouring concrete into hollow steel pipe columns to address the problems of insufficient uniformity and density of filling, complex construction organization, and inconvenient quality control during the pouring process of hollow pipe concrete. It constructs a construction technology solution that can guide the stable filling of concrete, promote the orderly progress of the pouring process, and enable the monitoring of the pouring status. This balances pouring quality, construction efficiency, and process controllability, thereby improving the uniformity and density of concrete filling, simplifying construction organization, and enabling real-time monitoring and feedback control of the pouring process.

[0007] This application provides a method for concrete pouring of hollow steel pipe columns, including the following steps:

[0008] The hollow tube to be poured is arranged at an angle so that the axial direction of the hollow tube forms a preset angle with the horizontal plane, and the tilting direction is towards the lower end of the hollow tube. The hollow tube is held in the tilted state by a fixing fixture.

[0009] Concrete is injected through a grouting port located at the lower end of the hollow tube, so that the concrete continuously fills the hollow tube from bottom to top; during the concrete filling process, air and / or excess concrete are discharged through a grouting outlet located at the higher end of the hollow tube.

[0010] The monitoring system installed on the hollow pipe can monitor the overflow status of concrete in real time and provide feedback on the monitoring information.

[0011] In one possible implementation, it also includes:

[0012] Before pouring, seal the suction pipe of the exhaust device to the slurry outlet and start the exhaust device to perform vacuum treatment inside the hollow tube.

[0013] The monitoring system collects the air venting status at the grout outlet in real time and feeds back the monitoring information to determine the air venting status inside the hollow tube. During the pouring process, the monitoring system simultaneously monitors the concrete overflow status and the accompanying air venting status. When it is detected that only concrete continuously overflows from the grout outlet and no obvious air bubbles are emitted, it is determined that the air venting is sufficient.

[0014] If air bubbles are continuously discharged from the grout outlet or concrete overflow is discontinuous, the monitoring system will report the abnormal information and adjust the pouring speed and / or continue to evacuate until the air bubbles are completely discharged.

[0015] In one possible implementation, the hollow tube includes an inner tube and an outer tube, the inner tube being coaxially disposed inside the outer tube, forming a casting cavity between the inner tube and the outer tube, and baffles being provided on both sides of the outer tube to seal the casting cavity, with the grouting port and the grouting outlet respectively disposed on the two baffles.

[0016] In one possible implementation, the system further includes: setting a monitoring probe of the monitoring system at the grout outlet to collect real-time exhaust status parameters and concrete overflow status parameters, wherein the monitoring system includes a monitoring probe, a signal transmission module, and a controller.

[0017] The controller is electrically connected to the monitoring probe and the exhaust device respectively. The parameters collected by the monitoring probe are transmitted to the controller through the signal transmission module. The controller receives the parameters collected by the monitoring probe and controls the start and stop of the exhaust device and the vacuum negative pressure value according to the preset conditions.

[0018] When the monitoring probe detects that no air bubbles are being discharged from the grout outlet and concrete is continuously overflowing, the exhaust device is shut off via the controller.

[0019] When the monitoring probe detects continuous bubble discharge, the controller increases the vacuum negative pressure or extends the vacuuming time.

[0020] In one possible implementation, it also includes:

[0021] When the controller determines that the concrete overflow status parameter indicates that the concrete overflow is discontinuous, the controller automatically reduces the pouring speed.

[0022] When the controller determines that the parameters collected by the monitoring probe exceed a preset threshold, the controller automatically performs an anomaly handling operation.

[0023] The abnormal handling operations include: issuing an alarm signal, suspending pouring, or deactivating the automatic control of the controller.

[0024] In one possible implementation, a funnel is provided on the slurry outlet, and the air intake pipe of the exhaust device is connected to the funnel through a sealing element. The upper opening of the funnel is higher than the higher end of the hollow tube. During the vacuuming and pouring process, air is discharged through the funnel, and the overflowing concrete flows into the funnel.

[0025] In one possible implementation, the funnel is provided with a transparent observation window, and the method further includes: during the pouring process, observing the overflow state of the concrete in real time through the transparent observation window, and determining that the hollow tube is filled when a continuous and full overflow of concrete is observed.

[0026] In one possible implementation, at least one of the following steps is also included: after pouring, the uniformity of concrete filling inside the hollow tube is determined by measuring the temperature difference between the two ends of the hollow tube; after pouring, the uniformity of concrete filling inside the hollow tube is determined by tapping and listening to the sound.

[0027] In one possible implementation, a check valve structure is provided on the grouting port, the check valve structure including a valve body, a valve plate, and a return spring; the valve body is connected to the grouting port, the valve plate is rotatably or slidably disposed in the valve body, one end of the return spring is connected to the valve body, and the other end is connected to the valve plate; when concrete is injected, the injection pressure overcomes the elastic force of the return spring and pushes the valve plate open; when injection stops, the elastic force of the return spring and the weight of the concrete cause the valve plate to return to its original position and close.

[0028] In one possible implementation, the fixing fixture includes a fixing bracket and a clamp-type fixture; it also includes:

[0029] The fixing bracket is fixed to the construction ground; the clamp-type tool is clamped tightly to the outer wall of the hollow pipe;

[0030] The hollow tube is adjusted and locked to the preset tilt angle by means of the angle adjustment and locking mechanism set between the clamp-type tooling and the fixed bracket.

[0031] This application provides a method for concrete pouring in hollow steel tube columns. By maintaining the hollow tube in a preset inclined state and injecting concrete from the lower end while expelling air and / or excess concrete from the higher end during the filling process, and by combining this with a monitoring system to monitor the overflow status of the concrete in real time and provide feedback on the monitoring information, the method achieves continuous bottom-up filling of concrete inside the hollow tube. This improves the internal gas expulsion conditions and filling continuity, thereby enhancing the uniformity and density of the concrete filling, and improving the efficiency and quality control of the pouring construction. Attached Figure Description

[0032] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0033] Figure 1 A schematic diagram of the overall structure of the hollow steel tube column concrete pouring method provided in this application. Figure 1 ;

[0034] Figure 2 A schematic diagram of the overall structure of the hollow steel tube column concrete pouring method provided in this application. Figure 2 ;

[0035] Figure 3 A schematic diagram of the hollow tube structure for the hollow steel tube column concrete pouring method provided in this application.

[0036] Reference numerals: 1. Hollow pipe; 11. Grouting port; 12. Grouting outlet; 13. Check valve; 14. Inner pipe; 15. Outer pipe; 16. Baffle; 2. Monitoring system; 21. Monitoring probe; 22. Signal transmission module; 23. Controller; 3. Exhaust device; 4. Funnel; 5. Transparent observation window; 6. Fixture; 61. Fixture bracket; 62. Clamp-type fixture; 63. Angle adjustment and locking mechanism.

[0037] The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0038] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0039] Hollow tube concrete pouring technology is widely used in engineering applications requiring high load-bearing capacity, overall stability, and durability, such as wind turbine towers, high-rise buildings, bridge support systems, and industrial plants. Current construction methods typically involve hoisting the steel pipe column to a vertical or near-vertical position, stabilizing it with bottom supports, lateral restraints, and fixing devices, and then pouring concrete from a pre-designated grouting location. The concrete gradually fills the internal space along the component's axis, while venting channels or grout outlets are installed to expel air, and the filling progress is judged based on the overflow status. This process has a certain degree of operability in traditional construction.

[0040] Based on the above scenarios, it is evident that traditional reactor technology, which involves adjusting the steel pipe column to a vertical position using hoisting equipment before pouring concrete, presents the following technical challenges: First, the process is highly dependent on hoisting equipment and fixed fixtures, requiring significant on-site mechanical resources and organizational costs. This is especially true under conditions of high-altitude or large component operations, where hoisting, alignment, and stabilization are time-consuming, placing high demands on the construction site and operating space. Second, during the long-distance flow of concrete within the pipe, the aggregate and slurry are prone to uneven distribution due to gravity, leading to problems such as aggregate settlement, slurry floating, localized accumulation, and residual internal pores, affecting filling density and mechanical properties. Third, observation and judgment during the pouring process rely heavily on manual experience, making it difficult to promptly detect localized incomplete filling or overflow anomalies. For ultra-long components or complex structures, the adaptability of traditional processes in terms of orientation, flow control, and on-site inspection further decreases, easily resulting in extended construction cycles, insufficient quality stability, and increased risks of rework.

[0041] This application provides a method for concrete pouring of hollow steel pipe columns. By arranging the hollow pipe to be poured at an inclined angle and maintaining a preset inclination angle so that the inclination direction is towards the lower end, concrete is injected from the grouting port set at the lower end to achieve continuous filling from bottom to top. Air and / or excess concrete are discharged from the grouting outlet set at the higher end. At the same time, the technical means of monitoring the concrete overflow status in real time and feeding back the monitoring information by using a monitoring system set on the hollow pipe solves the technical problems in the prior art caused by the reliance on vertical grouting and manual experience, such as complex construction organization, insufficient uniformity of concrete filling, easy retention of internal gas, and uncontrollable pouring process.

[0042] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0043] Reference Figure 1 , Figure 2 , Figure 3 This application discloses a method for concrete pouring of hollow steel pipe columns, including the following steps:

[0044] The hollow tube to be poured is arranged at an angle so that the axial direction of the hollow tube forms a preset angle with the horizontal plane, and the tilting direction is towards the lower end of the hollow tube. The hollow tube is held in an inclined state by the fixing fixture 6.

[0045] Concrete is injected through the grouting port 11 located at the lower end of the hollow tube, so that the concrete continuously fills the hollow tube from bottom to top; during the concrete filling process, air and / or excess concrete are discharged from the grouting port 12 located at the higher end of the hollow tube.

[0046] The monitoring system 2, installed on the hollow pipe, monitors the overflow status of the concrete in real time and provides feedback on the monitoring information.

[0047] The hollow pipe to be poured serves as the main body for pouring. The hollow pipe can be a circular steel pipe column, a rectangular steel pipe column, or a steel pipe column with an irregular cross-section. Its material can be carbon structural steel, low alloy high-strength steel, or weathering steel. Its length is usually several times greater than the characteristic dimension of the cross-section in order to form an internal cavity suitable for conveying concrete along the axial direction.

[0048] The hollow tube consists of an outer tube and an inner tube, forming a casting chamber between them. Concrete is poured into the casting chamber to form a hollow steel tube column 1. Baffles are detachably installed on both sides of the outer tube to seal the casting chamber. The hollow tube is tilted. After the concrete reaches the preset strength, the baffles can be quickly removed without damaging the structure of the outer and inner tubes. This avoids damage to the forming surface of the steel tube column caused by traditional demolding methods, simplifies the demolding process, shortens the construction cycle, and the baffles can be reused, reducing the cost of construction materials.

[0049] The hollow tube is arranged at an angle and kept in an inclined state, so that its axis forms a preset tilt angle with the horizontal plane. The tilt angle is a preset angle range that meets the requirements of concrete gravity flow and component stability. The tilt direction is towards the lower end of the hollow tube.

[0050] The hollow pipe is supported and limited by the fixed fixture 6. The fixed fixture 6 can be a steel bracket, clamp assembly or combined frame, or it can be composed of a fixed bracket 61, adjustable support, hydraulic jack or temporary welded support. It works in conjunction with the construction ground and the outer wall of the steel pipe column to maintain the preset tilt angle.

[0051] A grouting port 11 is provided at the lower end of the hollow pipe. The grouting port 11 can be a welded nozzle, a flange interface, or a detachable joint. Its aperture is matched with the particle size of the concrete aggregate and the conveying flow rate. It is used to connect to the pumping pipeline or the conveying pipeline and to input concrete into the steel pipe column.

[0052] A grout outlet 12 is provided at the higher end of the hollow pipe. The grout outlet 12 can be a welded nozzle, a flange interface, or a detachable joint. Its arrangement is used to form an exhaust and overflow channel so as to discharge air and / or excess concrete during the filling process.

[0053] The monitoring system 2, installed on the hollow pipe, may include a camera, a liquid level sensor, a bubble detection sensor, or a multi-sensor fusion unit. It is preferably installed at the grout outlet 12 or its adjacent area to monitor the overflow status of concrete in real time and feed back the monitoring information to the control terminal. In different embodiments, the monitoring system 2 may also use manual observation, video recognition, or automatic recognition to determine the overflow status.

[0054] During the process, the hollow pipe to be poured is first adjusted from a horizontal or near-horizontal state to a preset tilt angle and its spatial position is locked by the fixing fixture 6, so that a conveying path is formed inside the steel pipe column that gradually rises from the lower end to the upper end; then the concrete output from the pumping equipment is continuously injected from the grouting port 11 at the lower end, so that the concrete is pushed up along the inside of the steel pipe column from bottom to top under the combined action of gravity and pumping pressure. As the leading edge of the concrete continues to move to the upper end, the internal air is gradually pushed out and discharged through the grouting port 12 at the higher end. If a stable, continuous concrete overflow that matches the injection rhythm occurs at the grouting port 12, it indicates that the internal space has been basically filled.

[0055] During this process, the monitoring system 2, located near the slurry outlet 12, simultaneously collects overflow images, liquid level changes, or bubble discharge characteristics, and feeds the monitoring information back to the construction control terminal in real time, so as to adjust the injection flow rate, suspend grouting, or confirm the completion of grouting in a timely manner according to the overflow status.

[0056] The above technical solution allows concrete to be continuously filled from bottom to top inside the inclined steel pipe column, which shortens the free settlement path of the concrete during its long vertical fall and reduces the probability of aggregate and slurry separation, thereby improving the uniformity and density of the internal filling. At the same time, the low-in, high-out flow path facilitates the discharge of air and excess concrete, reducing voids, honeycombing, and local underfilling. Furthermore, the combination of the inclined arrangement and the fixed fixture 6 reduces the reliance on large hoisting equipment and complex high-altitude operations, making it easier to organize and implement in narrow spaces or restricted construction environments. The real-time feedback of the overflow status by the monitoring system 2 further improves the process controllability and the timeliness of quality judgment, thereby enhancing the safety, adaptability, and finished product quality of hollow pipe concrete pouring.

[0057] This application discloses a method for pouring concrete into hollow tubes, which further includes the following steps:

[0058] Before pouring, seal the air intake pipe of the exhaust device 3 to the slurry outlet 12, and start the exhaust device 3 to perform vacuum treatment inside the hollow tube.

[0059] The monitoring system 2 collects the exhaust status at the slurry outlet 12 in real time and feeds back the monitoring information to determine the air discharge situation inside the hollow tube.

[0060] During the pouring process, the concrete overflow status and the accompanying air venting are monitored simultaneously by the monitoring system 2. When it is detected that only concrete continuously overflows from the grout outlet 12 and no obvious air bubbles are discharged, it is judged that the air venting is sufficient.

[0061] If air bubbles are continuously discharged from the grout outlet 12 or concrete overflow is discontinuous, the abnormal information is fed back through the monitoring system 2, and the pouring speed is adjusted and / or the vacuum is continuously pumped until the air bubbles are completely discharged.

[0062] In this embodiment, the exhaust device 3 is used to create a controllable negative pressure environment inside the hollow tube before and during the pouring process, so as to timely exhaust the internal air and the gas newly generated or retained during the pouring process.

[0063] The suction pipe is a connecting pipe that establishes a suction passage between the exhaust device 3 and the slurry outlet 12. It can connect the slurry outlet 12 to the suction end of the exhaust device 3 in a sealed state, thereby performing vacuum treatment inside the hollow tube. In one possible embodiment, the exhaust device 3 can be a vacuum pump, a negative pressure suction machine, a gas-liquid separation suction unit, or a suction assembly capable of establishing negative pressure in stages.

[0064] In one possible embodiment, the suction pipe may be a rubber hose, a metal corrugated pipe, or a composite hose; in one possible embodiment, the sealing connection between the suction pipe and the slurry outlet 12 may be a rubber sealing ring, a flange gasket, or a quick-connect sealing sleeve to ensure stable airtightness at the interface during the suction process.

[0065] The exhaust device 3 is used to reduce the initial air content inside the steel pipe column and to continuously reduce the probability of gas retention during the rising and filling of concrete, thereby reducing the risk of internal pores, air entrapment and local voids.

[0066] The exhaust device 3 is usually located outside the slurry outlet 12 at the higher end of the hollow pipe, and forms a detachable connection with the slurry outlet 12 through the suction pipe. The sealing connection method can be socket type, flange compression type or quick locking type, to adapt to the on-site installation and disassembly requirements.

[0067] During the work process, before pouring, the suction pipe of the exhaust device 3 is sealed and connected to the grout outlet 12, and the exhaust device 3 is activated to evacuate the inside of the hollow tube, so that the air inside the column is discharged to the grout outlet 12; the monitoring system 2 collects the exhaust status at the grout outlet 12 in real time, and can comprehensively judge the internal air discharge status by information such as pressure change, frequency of bubble appearance, exhaust continuity and concrete flow pattern.

[0068] As concrete is injected from the lower end and gradually rises inside the inclined steel pipe column, the monitoring system 2 simultaneously collects the overflow status and the accompanying venting. If it is detected that only concrete continuously overflows from the grout outlet 12 without obvious air bubbles being discharged, it is determined that the internal venting is sufficient, and the venting process can be maintained or stopped. If it is detected that air bubbles are continuously discharged from the grout outlet 12 or that the concrete overflow is intermittent or discontinuous, the monitoring system 2 will report abnormal information to control the pouring speed to be reduced, paused, or adjusted in stages, and will cooperate with continuous vacuuming until the air bubbles are completely discharged.

[0069] This application also discloses that the hollow tube includes an inner tube 14 and an outer tube 15. The inner tube is coaxially disposed inside the outer tube, forming an annular closed casting cavity between the two. Baffles 16 are respectively provided at both ends of the outer tube, and the two baffles 16 are used to seal the casting cavity. The grouting port 11 and the grouting outlet 12 are respectively provided on the two baffles 16.

[0070] Both the inner tube 14 and the outer tube 15 are hollow tubular structures. The outer diameter of the inner tube 14 is smaller than the inner diameter of the outer tube 15, and their axes are aligned. The pouring cavity is used to fill concrete and, together with the inner tube 14 and the outer tube 15, constitutes the composite load-bearing structure of the hollow steel tube column 1. The baffle 16 is a plate-shaped sealing component that matches the contour of the end of the outer tube 15. It is set at both ends of the outer tube 15 to achieve a sealed connection with the ends of the outer tube 15, so that the pouring cavity is completely sealed and prevents grout leakage, material runoff, or gas from entering from the end gaps during the pouring process.

[0071] The grouting port 11 and the grout outlet 12 are respectively located at corresponding positions on the two baffles 16. The grouting port 11 is located on the baffle 16 at the lower end of the hollow tube, and the grout outlet 12 is located on the baffle 16 at the higher end of the hollow tube. This is adapted to the inclined arrangement direction of the hollow tube, ensuring that concrete can be injected from the grouting port 11 and fill the pouring cavity from bottom to top, while residual gas and excess concrete generated during the pouring process can be discharged from the grout outlet 12, forming a complete pouring-venting process.

[0072] The inner tube 14 and outer tube 15 have the same axial length and are compatible with the thickness direction of the baffle 16, ensuring that the casting cavity forms a complete closed space after the three are connected. The connection between the baffle 16 and the outer tube 15 can be a detachable connection (such as a bolted connection). A detachable connection facilitates the disassembly and reuse of the baffle 16 after casting, while a fixed connection improves the sealing reliability, and can be flexibly selected according to the construction scenario. The inner tube 14 and outer tube 15 are usually made of high-strength steel to ensure the overall structural strength and withstand the casting pressure and subsequent load-bearing requirements.

[0073] In one embodiment, the baffle 16 is bolted to the end of the outer pipe 15, and a sealing gasket is provided between the baffle 16 and the inner wall of the outer pipe 15 to improve sealing performance and prevent grout leakage. In another embodiment, the baffle 16 and the end of the outer pipe 15 are welded together to form an integrated sealing structure, suitable for applications requiring high sealing performance. In yet another embodiment, a sealing groove is provided on the baffle 16, and a sealing strip is embedded in the sealing groove. The seal is achieved by the tight fit between the strip and the inner wall of the outer pipe 15, ensuring both sealing effect and easy disassembly and installation.

[0074] The diameter of the grouting port 11 should be compatible with the output end of the concrete conveying equipment to ensure smooth concrete injection and avoid obstruction of conveying due to an insufficient diameter. The diameter of the grout outlet 12 should meet the requirements for gas discharge and excess concrete overflow, and should be compatible with the suction pipe of the exhaust device 3 to facilitate vacuuming before pouring and simultaneous exhausting during pouring.

[0075] During construction, the hollow pipe is kept at an angle. First, two baffles 16 are installed on both sides of the outer pipe 15 and sealed to ensure no leakage in the pouring cavity. Then, the concrete conveying equipment is connected to the grouting port 11, and the suction pipe of the exhaust device 3 is connected to the grout outlet 12 to complete the pouring preparation. During the pouring process, concrete is continuously injected into the pouring cavity from the grouting port 11, gradually filling it from bottom to top. The residual gas in the cavity is discharged through the grout outlet 12 under the combined influence of buoyancy, vacuuming, and concrete propulsion. Excess concrete overflows from the grout outlet 12, indicating that the pouring cavity has been basically filled.

[0076] When the monitoring system 2 detects that only concrete is continuously overflowing from the grout outlet 12 without any obvious air bubbles, it indicates that the air in the pouring cavity has been basically expelled, and the concrete filling process can be completed under a relatively uniform flow condition. After pouring, the baffle 16 can be removed or retained according to the connection method of the baffle 16 to complete the pouring construction of the hollow steel pipe column 1.

[0077] Through the above technical solution, the pouring cavity formed by the inner and outer pipes provides a stable space for concrete filling, the two baffles 16 achieve reliable sealing, and the reasonable arrangement of the grouting port 11 and the grout outlet 12 ensures the smooth progress of concrete pouring and gas discharge, effectively avoiding problems such as grout leakage and gas retention, and helping to improve the pouring quality and structural integrity of the hollow steel pipe column 1.

[0078] This application discloses a method for pouring concrete into hollow tubes, which further includes the following steps:

[0079] The monitoring probe 21 of the monitoring system 2 is set at the grout outlet 12 to collect the exhaust status parameters and concrete overflow status parameters in real time. The monitoring system 2 includes the monitoring probe 21, the signal transmission module 22 and the controller 23.

[0080] The controller 23 is electrically connected to the monitoring probe 21 and the exhaust device 3 respectively, and the parameters collected by the monitoring probe 21 are transmitted to the controller 23 through the signal transmission module 22.

[0081] The controller 23 receives the parameters collected by the monitoring probe 21 and controls the start / stop of the exhaust device 3 and the vacuum negative pressure value according to the preset conditions.

[0082] When the monitoring probe 21 detects that no air bubbles are being discharged from the grout outlet 12 and concrete is continuously overflowing, the exhaust device 3 is shut off by the controller 23.

[0083] When the monitoring probe 21 detects that bubbles are continuously being discharged, the controller 23 increases the vacuum negative pressure or extends the vacuum time.

[0084] In this embodiment, the monitoring probe 21 is a detection unit installed at the slurry outlet 12 to simultaneously collect the air release state parameters and concrete overflow state parameters. It can identify the air bubble discharge, slurry continuity, and local flow state at the slurry outlet 12 in real time.

[0085] The monitoring probe 21 converts the visible or physical state at the slurry outlet 12 into a transmittable electrical signal, so that the controller 23 can determine whether the exhaust is sufficient and form a closed-loop control for the exhaust device 3, thereby reducing manual observation and intervention.

[0086] The monitoring probe 21 can be installed on the edge of the slurry outlet 12, inside the closed cavity adjacent to the slurry outlet 12, or at the observation window connected to the slurry outlet 12. The installation method can be threaded, clamped, bracketed, or embedded.

[0087] The monitoring probe 21 of the monitoring system 2 is a sensor used to sense and quantify the physical state at the grout outlet 12. Its core function is to provide objective, quantitative data to replace subjective judgment. This monitoring probe 21 can take various forms. For example, it can be a visual sensor, using a camera combined with image recognition algorithms to identify the size, number, and frequency of bubbles at the grout outlet 12, as well as the flow state of the concrete; it can also be a pressure sensor to monitor exhaust pressure fluctuations; it can be a flow sensor to monitor the flow rate of gas or concrete; or it can be an acoustic sensor to determine the presence of bubbles through sound characteristics. These probes can convert physical signals into electrical signals, representing the exhaust state and the concrete overflow state.

[0088] The field of view or measurement range of the monitoring probe 21 should at least cover the main exhaust area of ​​the grout outlet 12. Its effective detection distance should be matched with the diameter of the grout outlet 12. It can usually be arranged to cover the outer circumference of the grout outlet 12 and the predetermined height range above it, so as to ensure that the state of bubble discharge and continuous concrete overflow is within the identifiable area.

[0089] The controller 23 is electrically connected to both the monitoring probe 21 and the exhaust device 3 to establish an electrical communication and control link between the controller 23, the probe, and the exhaust device 3. This connection is achieved through a standard electrical interface, ensuring that the controller 23 can accurately read probe data and send start / stop and adjustment parameter commands to the exhaust device 3. Through the signal transmission module 22, the parameters collected by the monitoring probe 21 are transmitted to the controller 23 in real time, ensuring that the controller 23 can obtain monitoring information promptly. The signal transmission module 22 converts and encodes the analog or digital signals output by the probe and sends them to the controller 23 via a physical link. The controller 23 receives, decodes, and analyzes the received signals.

[0090] After receiving parameters collected by the monitoring probe 21, the controller 23 automatically controls the start / stop of the exhaust device 3 and the vacuum negative pressure value according to preset conditions, thereby realizing automated and intelligent control based on real-time data. The controller 23 internally stores preset logical judgment conditions, such as "the number of air bubbles is below the threshold" and "the concrete flow rate is stable." When the received parameters meet these conditions, the controller 23 triggers corresponding control actions, such as sending a "stop" command to the exhaust device 3 or sending a "adjust negative pressure to X kPa" command. The negative pressure value X is usually determined comprehensively based on the length and diameter of the steel pipe column, the fluidity of the concrete, and the power of the exhaust device. The value range of X can be 20 kPa to 60 kPa (absolute pressure), corresponding to a gauge pressure of approximately -80 kPa to -40 kPa.

[0091] Specifically, when the monitoring probe 21 detects no air bubbles escaping from the grout outlet 12 and concrete continuously overflows, the controller 23 determines that venting is sufficient and sends a command to shut down the venting device 3, thereby accurately determining the timing of venting completion and avoiding excessive vacuuming or energy waste. For example, if the image recognition algorithm does not detect air bubbles for N consecutive frames, and the flow sensor shows that the concrete flow rate is stable above the preset value, the controller 23 determines that venting is sufficient and sends a command to shut down the venting device 3. Conversely, when the monitoring probe 21 detects continuous air bubbles escaping, the controller 23 dynamically adjusts the vacuuming strategy, such as increasing the vacuuming negative pressure or extending the vacuuming time, to ensure thorough venting. If the probe data shows that air bubbles persist, the controller 23 automatically adjusts the operating parameters of the venting device 3 according to the preset control strategy, for example, sending a command to the vacuum pump to increase its speed to increase the negative pressure, or extending the duration of vacuuming under the current negative pressure until the air bubbles disappear.

[0092] Through the above technical solution, real-time, objective, and quantitative monitoring of the exhaust status and concrete overflow status is achieved, avoiding the subjectivity and lag of manual judgment. The controller 23 can automatically and accurately control the start and stop of the exhaust device 3 according to preset conditions, and dynamically adjust the vacuum negative pressure value or extend the vacuum time to ensure that the air inside the hollow tube is completely discharged, avoiding voids or honeycomb defects during concrete pouring, improving the intelligence level and efficiency of the pouring process, reducing manual intervention, lowering the difficulty of operation and potential human error, and ensuring the continuity and fullness of concrete filling. This significantly improves the pouring quality and structural strength of the hollow tube. During the vacuuming stage, it can more accurately judge whether the vacuuming is sufficient; during the pouring stage, it can more effectively deal with abnormal exhaust situations and ensure continuous concrete filling.

[0093] This application discloses a method for pouring concrete into hollow tubes, which further includes the following steps:

[0094] When the controller 23 determines that the concrete overflow status parameters show that the concrete overflow is discontinuous, the controller 23 automatically reduces the pouring speed.

[0095] When the controller 23 determines that the parameters collected by the monitoring probe 21 exceed the preset threshold, the controller 23 automatically performs an abnormal handling operation.

[0096] Abnormal handling operations include: issuing an alarm signal, suspending pouring, or deactivating the automatic control of controller 23.

[0097] The controller 23 performs logical judgments on the exhaust status parameters, concrete overflow status parameters, and operating parameters related to the pouring equipment collected by the monitoring probe 21, and outputs corresponding control commands based on the judgment results.

[0098] When the concrete overflow parameters collected by the monitoring probe 21 indicate that the concrete overflow from the outlet 12 is discontinuous, this usually means that there may be fluctuations in the concrete supply, unstable pumping pressure, or local obstruction inside the hollow pipe, preventing the concrete from forming a continuous and stable filling flow. In this case, the controller 23 will automatically send a command to the concrete pumping equipment to reduce the concrete pumping speed according to the preset judgment logic. Reducing the pouring speed provides more time for the concrete to flow and self-compact inside the hollow pipe, helping to eliminate the discontinuous overflow phenomenon and ensuring that the concrete can uniformly and densely fill the entire hollow pipe, avoiding voids or delamination caused by pouring too quickly.

[0099] In addition to collecting parameters related to concrete overflow, monitoring probe 21 can also collect various parameters such as exhaust flow rate, exhaust pressure, and concrete temperature. Controller 23 stores the normal operating ranges for these parameters, i.e., preset thresholds. When any one or more parameter values ​​collected by monitoring probe 21 exceed these preset thresholds—for example, an abnormal increase in exhaust pressure, excessively high or low concrete temperature—controller 23 will immediately identify it as an abnormal situation. At this time, controller 23 will no longer execute the conventional pouring or exhaust control strategy, but will instead initiate preset abnormal handling operations.

[0100] The abnormal handling operation can include: First, issuing an alarm signal to alert on-site operators via an audible and visual alarm or display interface so that they can pay attention and intervene in a timely manner; Second, in certain serious abnormal situations, such as when concrete overflow completely stops or the vent is completely blocked, the controller 23 will automatically stop the concrete pumping to prevent the problem from worsening and to give operators time to troubleshoot and resolve the fault; Third, for some complex abnormal situations or situations that the system cannot automatically judge and handle, the controller 23 can deactivate its automatic control function and return control to the human operator, allowing the operator to intervene manually based on on-site experience and actual conditions, thereby avoiding the automated system making wrong decisions under uncertain conditions.

[0101] Through the above technical solution, this application can effectively address unexpected situations such as discontinuous concrete overflow or abnormal system parameters that may occur during the pouring process. When discontinuous concrete overflow occurs, automatically reducing the pouring speed helps restore continuous and stable filling, avoiding voids and defects. When monitored parameters exceed preset thresholds, automatic alarm, pouring suspension, or automatic control cancellation operations are executed, providing timely warnings, preventing problems from escalating, and offering opportunities for manual intervention. This significantly improves the intelligence and automation level of the hollow tube concrete pouring process and the reliability of construction quality, while reducing the burden of manual monitoring and potential construction risks.

[0102] This application also discloses that a funnel 4 is provided on the slurry outlet 12, and the air suction pipe of the exhaust device 3 is connected to the funnel 4 through a sealing element. The upper opening of the funnel 4 is higher than the end of the higher end of the hollow tube. During the vacuuming and pouring process, air is discharged through the funnel 4, and the overflowing concrete flows into the funnel 4.

[0103] In this application, the funnel 4 is used to form an air collection and material collection component set at the slurry outlet 12, expanding the exhaust channel of the slurry outlet 12 into a buffer cavity with a certain volume, so as to centrally guide and collect the discharged air, entrained air bubbles and a small amount of overflowing concrete during the vacuuming stage and the concrete pouring stage.

[0104] On the one hand, the funnel 4 can provide a stable air intake interface for the exhaust device 3, making the negative pressure environment at the slurry outlet 12 more uniform and reducing local eddies and instantaneous splashing; on the other hand, it can form a receiving space when the concrete begins to overflow from the slurry outlet 12, preventing the concrete from splashing directly onto the outer wall of the steel pipe column or the surrounding work area, thus facilitating the observation and judgment of the slurry discharge status.

[0105] In one possible embodiment, the funnel 4 can be directly installed above the slurry outlet 12 at the higher end of the hollow tube and arranged coaxially with the slurry outlet 12. The lower opening of the funnel 4 matches the periphery of the slurry outlet 12. The two can be fixedly connected by flanges, clamps, welding seats or detachable joints to ensure that the funnel 4 remains stable during vacuuming and pouring.

[0106] The suction pipe of the exhaust device 3 can be inserted into the side wall, top cover, or neck of the funnel 4, and form an airtight connection with the funnel 4 through a sealing element, thereby continuously extracting air from inside the funnel 4 and the steel pipe column under negative pressure. The upper opening of the funnel 4 is higher than the higher end of the hollow tube, so as to form a buffer space above the end of the steel pipe column that is higher than the overflow surface, separating the air exhaust path from the concrete overflow path, thereby improving exhaust efficiency and making it easier to observe whether the concrete is continuously overflowing.

[0107] The funnel 4 can be any one of a conical funnel 4, a flared funnel 4, or a stepped funnel 4. The conical funnel 4 facilitates the downward collection of gas and concrete along the inner wall, the flared funnel 4 can expand the receiving range, and the stepped funnel 4 can form a larger opening at the top and a smaller transition section at the bottom to enhance the flow stability.

[0108] The funnel 4 can be made of welded steel plate, stainless steel plate or corrosion-resistant engineering plastic. Welded steel plate is suitable for withstanding large mechanical impacts on the construction site, stainless steel plate is suitable for working conditions that require high corrosion resistance, and engineering plastic can reduce its weight and facilitate disassembly and assembly.

[0109] The seals can be rubber rings, silicone gaskets, or flexible flange seals to accommodate the connection requirements of different diameters and installation methods; the suction pipe can be a flexible hose, rigid pipe, or corrugated pipe to balance installation space, pressure resistance, and adjustability.

[0110] The upper opening diameter of funnel 4 is typically larger than that of the grout outlet 12 to provide sufficient receiving area in the initial stage of concrete overflow. The lower connection diameter of funnel 4 can be approximately the same as or slightly larger than that of the grout outlet 12 to ensure a smooth transition between venting and overflow. The height of funnel 4 should meet the requirement that its upper opening is higher than the higher end of the hollow pipe, forming a visible overflow space.

[0111] When the system is started, the exhaust device 3 first evacuates the inside of the hollow tube through the suction pipe that is sealed to the funnel 4. The air inside the steel pipe column enters the grout outlet 12 along the negative pressure channel that gradually forms from the lower end to the upper end and flows into the inside of the funnel 4, and is then discharged through the suction pipe. Subsequently, during the pouring process, the concrete enters the inside of the steel pipe column through the grouting port 11 at the lower end and is pushed along the inner cavity to the higher end. When the front edge of the concrete reaches the grout outlet 12, a small amount of concrete and entrained air bubbles first enter the inner cavity of the funnel 4. Under the guidance of the funnel 4, the gas continues to be discharged upward, while the concrete flows into the funnel 4 and is collected by it under the action of gravity and continuous feeding.

[0112] Since the upper opening of funnel 4 is higher than the higher end of the steel pipe column, a stable overflow interface can be formed when the concrete begins to overflow. This avoids the vent being directly blocked by the concrete and reduces the probability of air bubbles being entrained and splashing out. As a result, the venting process is more continuous and the overflow status is clearer. This makes it easier to cooperate with the monitoring system 2 to determine whether the internal air has been sufficiently removed. It also helps to improve the uniformity and density of the concrete filling inside the steel pipe column and the controllability of the on-site pouring process.

[0113] By using the above technical solution, a funnel 4 is set on the slurry outlet 12, and the suction pipe of the exhaust device 3 is connected to the funnel 4 through a sealing element. At the same time, the upper opening of the funnel 4 is designed to be higher than the higher end of the hollow tube. This can significantly improve the efficiency and cleanliness of the hollow tube concrete pouring process, making the exhaust and overflow management during the pouring process more controllable and efficient. It helps to ensure the uniformity and density of the concrete filling and reduce the generation of internal voids and defects.

[0114] This application also discloses that the funnel 4 is provided with a transparent observation window 5, and the method further includes the following steps:

[0115] During the pouring process, the overflow status of the concrete is observed in real time through the transparent observation window 5. When a continuous and full overflow of concrete is observed, it is determined that the filling inside the hollow tube is complete.

[0116] The transparent observation window 5 is a transparent visualization component set on the side wall, upper window or inclined observation surface of the funnel 4. It allows direct observation of the flow, backflow, air bubble escape and overflow continuity of the concrete in the funnel 4 without disassembling the funnel 4 or approaching the high slurry discharge area.

[0117] The transparent observation window 5 provides a visual channel during the overall pouring process, allowing operators to judge whether the inside of the steel pipe column is full based on the appearance of the concrete in the funnel 4. This avoids misjudgment caused by relying solely on experience based on pouring time or pumping pressure, and reduces quality fluctuations caused by underfilling, local cavities, or excessive material addition.

[0118] The transparent observation window 5 and the funnel 4 form an integrated observation interface. Its installation position is preferably within the normal line of sight of the operator, and corresponds to the main flow area of ​​the concrete in the funnel 4 from the grout outlet 12 and into the funnel 4, so as to ensure that it can be clearly identified whether the concrete presents a continuous, uniform and full overflow state.

[0119] In one possible embodiment, the transparent observation window 5 can be embedded in the side wall opening of the funnel 4 and fixed by a sealing ring, pressure plate or flange seat to ensure the sealing and pressure resistance of the connection. In another possible embodiment, the transparent observation window 5 can be set as a transparent cover covering the local observation hole of the funnel 4. In other possible embodiments, it can also be set as a local transparent cylindrical section or transparent compartment of the funnel 4 to adapt to the observation needs of funnels of different specifications and different construction environments.

[0120] The material of the transparent observation window 5 can be selected according to the requirements of impact resistance, wear resistance and chemical corrosion resistance. For example, tempered glass, polycarbonate sheet or acrylic sheet can be used, or a sandwich transparent composite sheet can be used. Tempered glass has high surface hardness and scratch resistance, polycarbonate sheet has good impact resistance, and acrylic sheet has high light transmittance and easy processing.

[0121] The effective observation area of ​​the transparent observation window 5 should be sufficient to cover the main overflow area inside the funnel 4 so that the observer can identify whether a continuous full-flow state has been formed on the concrete surface. Generally, it can be set as a partial opening on the side wall of the funnel 4. The height of the window should match the range of liquid level changes inside the funnel 4. The width of the window is preferably able to cover most of the visible flow channel. The thickness of the transparent observation window 5 should meet the structural strength requirements under construction vibration and concrete impact, and should not significantly affect the venting and overflow functions of the funnel 4.

[0122] When the system is started, the funnel 4 is installed at the grout outlet 12 and kept in sealed connection with the suction pipe of the exhaust device 3. Concrete is continuously pumped into the hollow tube through the grouting port 11 at the lower end and gradually rises. Under pressure, the air inside enters the funnel 4 through the grout outlet 12 and is then exhausted by the exhaust device 3. At the same time, the concrete gradually enters the visible area of ​​the funnel 4 as the liquid level rises. The operator can directly observe the appearance of the concrete in the funnel 4 through the transparent observation window 5. When the concrete gradually transitions from intermittent upward movement, carrying air bubbles, or localized discontinuous discharge to a continuous, uniform, and full overflow state, it can be determined that the hollow tube is basically completely filled. Then, pouring is stopped and short-term pumping is maintained to stabilize the internal state. Because the transparent observation window 5 can provide direct, real-time and continuous visual feedback, the operator can complete the determination of the pouring end point without relying on climbing to check or indirect inference, thereby improving the intuitiveness and accuracy of the filling completion determination, reducing the risk of underfilling caused by incomplete air bubble discharge, unclear overflow status or premature stopping of pouring, and making the quality control of the entire hollow tube concrete pouring process more stable and reliable.

[0123] Through the above technical solution, based on the data feedback from monitoring system 2, a more intuitive and reliable basis for judgment is provided. The transparent observation window 5 allows operators to directly observe the actual state of concrete overflowing from the outlet 12, thereby accurately judging whether the concrete overflows continuously and fully, and whether air bubbles are present. This direct visual confirmation compensates for the shortcomings that may exist in relying solely on indirect sensor data, avoiding misjudgments caused by data interpretation bias or sensor malfunction. When continuous and full concrete overflow is observed, it can be confirmed that the hollow tube has achieved a dense, void-free, and defect-free filling, greatly improving the reliability of the pouring quality and the accuracy of the judgment, ensuring the structural integrity and load-bearing capacity of the hollow tube.

[0124] This application discloses a method for pouring concrete into hollow tubes, which further includes at least one of the following steps:

[0125] After the pouring is completed, the temperature difference between the two ends of the hollow tube is measured to determine the uniformity of the concrete filling inside the hollow tube.

[0126] After the pouring is completed, the uniformity of the concrete filling inside the hollow tube is judged by tapping and listening to the sound.

[0127] In this application, the uniformity testing step after pouring is used to verify the filling status of the concrete inside the hollow tube. Specifically, when judging the uniformity of the internal concrete filling by measuring the temperature difference between the two ends of the hollow tube, the temperature difference reflects the difference in thermal response that occurs on the outer surface of the two ends of the steel pipe column or in the adjacent area after pouring. This difference in thermal response can indirectly indicate whether there are any areas of incomplete compaction, segregation, or voids in the internal concrete. When judging the uniformity of the internal concrete filling by tapping and listening, the acoustic response and vibration feedback formed on the outer wall of the steel pipe column after a short-term impact are used to determine whether there are any voids, underfilling, or uneven compaction inside. All of the above testing methods are non-destructive testing methods, which can complete the quality verification without dismantling the steel pipe column structure or affecting its service life, thus providing supplementary evidence for pouring acceptance.

[0128] In one possible embodiment, temperature difference measurement can be performed by inspectors after the hollow pipe has been poured and reached a preliminary stable state. Temperature measurement points can be set up at both ends of the pipe, near the end plates, or in the end flange connection area. These measurement points can use infrared thermometers, thermocouples, surface temperature sensors, or thermal imaging devices to acquire temperature data, and the temperature values ​​at both ends can be compared. When the temperature difference between the two ends is within a preset range, it can be determined that the concrete inside the steel pipe column is relatively uniformly filled axially. When the temperature difference exceeds a preset threshold, it indicates that there may be local voids, discontinuous grouting, or areas with significant differences in density. The temperature difference threshold can be set according to the length of the steel pipe column, wall thickness, concrete mix ratio, ambient temperature, and curing time. It is usually calibrated through testing and incorporated into the testing standard to improve the consistency of the judgment. Temperature measurement points should preferably be evenly distributed along the circumference of the ends to avoid deviations in the judgment results caused by single-point environmental disturbances.

[0129] In one possible embodiment, the tapping and listening method can be performed by an operator using a wooden mallet, rubber mallet, or a dedicated tapping probe to lightly tap the outer wall, end plate, or end reinforcement area of ​​the hollow tube at predetermined intervals. The echo, resonant frequency, and attenuation characteristics are then collected manually or with the aid of a vibration pickup, microphone, or spectrum analysis device. For densely filled and well-bonded areas, the tapping echo is typically dull and uniform; for locations with hollow, detached, or unfilled areas, the response often exhibits a crisp or hollow acoustic characteristic. To improve the repeatability of the test, the tapping force should be consistent, and the tapping points should cover areas of the steel pipe column that may have defects. The spacing between tapping points can be set according to the length, diameter, and wall thickness of the steel pipe column, and axial and circumferential sections can be tested to obtain more complete information on the internal filling status. Auditory judgment can rely on field experience or be aided by acoustic acquisition and analysis software to determine characteristic frequency bands, attenuation rates, and peak differences.

[0130] In one possible embodiment, temperature difference measurement and acoustic percussion can be used individually or in combination during the acceptance phase after pouring to form a complementary judgment mechanism. Temperature difference measurement is suitable for rapid screening of axial filling uniformity, while acoustic percussion is suitable for confirming the location of localized abnormal areas. Combining the two can improve the accuracy and stability of defect identification. For longer hollow pipes or construction sites with significant ambient temperature variations, testing can be performed after a preset settling time following pouring to reduce the impact of early hydration heat of concrete and external environmental fluctuations on the measurement results. It should be understood that the above examples are merely illustrative and not limiting. Without departing from the overall concept of this application, other non-destructive methods such as ultrasonic testing, radar testing, or post-grouting imaging testing can be used to further confirm the internal concrete filling uniformity.

[0131] When the system is started, after the hollow tube is poured at an angle and grouting is stopped, the construction personnel first wait for the concrete inside the column to initially set and stabilize. Then, depending on the site conditions, they choose either temperature difference measurement or sound-tapping test to verify the uniformity of the internal filling. When using temperature difference measurement, the inspectors simultaneously collect temperature data at representative locations at both ends of the hollow tube and determine whether there are areas of uneven density or voids based on the relationship between the temperature difference at both ends and a preset threshold. When using the sound-tapping test, the inspectors uniformly tap the outer wall of the steel pipe column along a predetermined test line and identify whether there are underfilling or voids based on the dullness of the echo, the duration of resonance, and the differences in sound. Through the above post-inspection methods, pouring defects can be detected in a timely manner without damaging the steel pipe column structure, providing a basis for subsequent reinforcement, re-pouring, or acceptance decisions, thereby improving the controllability and reliability of the hollow tube concrete pouring quality.

[0132] The above technical solutions enable effective non-destructive testing and evaluation of the concrete filling quality inside the hollow tube after concrete pouring. Measuring the temperature difference between the two ends provides a quantitative and objective method to promptly detect uneven internal density or potential voids, overcoming the limitations of relying solely on concrete overflow. The tapping and listening method offers a simple, intuitive, and rapid detection method to help locate potential defect areas. These two methods can be used individually or in combination for mutual verification, thereby comprehensively and accurately determining the uniformity of concrete filling inside the hollow tube, ensuring project quality and structural safety, and effectively reducing structural risks and subsequent maintenance costs caused by internal defects.

[0133] This application also discloses that a check structure is provided on the grouting port 11, and the check structure includes a valve body, a valve plate and a return spring.

[0134] The valve body is connected to the grouting port 11. The valve plate is rotatably or slidably installed in the valve body. One end of the return spring is connected to the valve body and the other end is connected to the valve plate.

[0135] When concrete is injected, the injection pressure overcomes the elastic force of the return spring and pushes the valve plate open;

[0136] When the injection stops, the spring force of the reset spring and the weight of the concrete cause the valve plate to reset and close.

[0137] The check valve is a one-way opening and closing component installed at the end of the grouting port 11 or coaxially connected to the grouting port 11. It is used to block the backflow when concrete can only pass through in the grouting direction. In conjunction with the inclined hollow pipe pouring condition, it maintains the one-way sealing state of the grouting port 11 during grouting intervals, pressure fluctuations in the delivery pipeline, or pump stoppage, to prevent concrete from flowing back from the inside of the steel pipe column to the grouting side under its own gravity, thereby reducing the risk of pipe blockage, grout leakage, and interface contamination.

[0138] The check valve is installed at the interface of the grouting port 11. The valve body can be fixed to the grouting port 11 by means of flange connection, threaded connection or welding connection. The valve plate is located in the flow cavity of the valve body and forms an opening and closing surface corresponding to the valve seat. The return spring is arranged between the valve plate and the valve body or on the driving side of the valve plate to apply a return force to the valve plate so that it automatically returns to the closed position when there is no injection pressure.

[0139] The valve body can be a metal valve seat type housing, a welded cylindrical joint, or an integrally formed flow channel valve cavity; the valve plate can be a flapper that flips around a pin shaft, a slide valve plate that moves back and forth along a guide groove, or a covered disc valve plate; the return spring can be a helical compression spring, a torsion spring, or a leaf spring.

[0140] The effective shielding area of ​​the valve plate should not be less than the effective diameter of the grouting port 11 to ensure that the entire flow section is covered when closed. The inner diameter of the flow channel of the valve body is usually basically consistent with or slightly larger than the inner diameter of the grouting pipeline to reduce the local resistance when the concrete passes through. The stiffness coefficient of the reset spring should match the injection pressure of the concrete so that the valve plate can be reliably opened under normal pumping pressure and can be quickly reset and closed under the combined action of the concrete gravity and elasticity after the injection stops. The opening stroke or rotation angle of the valve plate should meet the requirements of the passage of concrete particles and the continuous flow of grout to avoid blockage or uneven scouring due to insufficient opening.

[0141] When the system starts, the delivery pump presses concrete into the valve body through the grouting port 11. The pressure formed at the front end of the concrete acts on the pressure surface of the valve plate. After the injection pressure reaches the preset opening threshold, the valve plate overcomes the elastic force of the return spring and rotates or slides along the guide direction, thereby forming an open flow path connecting the grouting port 11 and the internal channel of the steel pipe column, allowing the concrete to continuously enter the hollow pipe and push towards the higher end. When the pumping is paused or the injection ends, the pressure in the pipeline gradually decreases, the valve plate loses continuous thrust, and returns to the valve seat and closes under the combined action of the restoring force of the return spring and the closing tendency formed by the self-weight of the concrete, thereby blocking the reverse flow of concrete inside the steel pipe column to the grouting port 11.

[0142] Grouting port 11 can maintain a relatively sealed state during intermittent pouring, phased material replenishment, or shutdown waiting for material, reducing pipeline sedimentation and interface contamination caused by backflow, reducing the probability of blockage during subsequent restart, making the grouting process more stable, facilitating the maintenance of continuous filling under inclined pouring conditions, and helping to improve the reliability of concrete delivery, construction cleanliness, and overall pouring quality inside the steel pipe column.

[0143] Through the above technical solutions, the check valve structure effectively prevents backflow of concrete during the pouring process when injection is interrupted or pressure fluctuates. This not only avoids waste of concrete materials and pollution at the construction site, but more importantly, it ensures unidirectional and continuous filling of concrete, preventing air from being drawn into the hollow tube due to backflow, thereby significantly improving the density and uniformity of the concrete filling. Combined with the inclined arrangement, bottom-up pouring, and vacuum technology solutions in this application, the check valve structure further ensures defect-free filling of the concrete inside the hollow tube, improves the overall pouring quality and structural strength, and provides a reliable guarantee for obtaining high-quality concrete-filled steel tube components.

[0144] This application also discloses that the fixing fixture 6 includes a fixing bracket 61 and a clamp-type fixture 62; the method further includes the following steps:

[0145] Fix the fixed bracket 61 to the construction ground;

[0146] The clamp-type tool 62 is clamped tightly to the outer wall of the hollow tube;

[0147] The hollow tube is adjusted and locked to a preset tilt angle by means of the angle adjustment and locking mechanism 63 set between the clamp-type tooling 62 and the fixed bracket 61.

[0148] The fixed bracket 61 is used as a ground bearing foundation for inclined positioning. It is a support frame spanning the construction ground. After being reliably anchored to the ground, it provides a stable support point for the inclined arrangement of the hollow tube.

[0149] The clamp-type fixture 62 is used to clamp and constrain the outer wall of the hollow pipe, so that the steel pipe column maintains the consistency of the axis during the force adjustment process; the angle adjustment and locking mechanism 63 is used to form an adjustable connection between the fixed bracket 61 and the clamp-type fixture 62, and lock the relative position after reaching the preset tilt angle to prevent the steel pipe column from swinging back due to the weight of the concrete, pumping pressure or construction disturbance during the pouring process.

[0150] The fixed bracket 61 can be set in the construction area corresponding to the lower end or middle of the steel pipe column. Its bottom is fixed to the construction ground by anchor bolts, embedded parts, ballast blocks or chemical anchors. The clamp-type tool 62 is fitted on the outer wall of the steel pipe column and locked by fasteners to form a large contact wrap angle and sufficient friction clamping force.

[0151] Angle adjustment and locking mechanism 63 is set at the connection position of the upper crossbeam, side column or adjustable point of the fixed bracket 61 and the clamp-type tooling 62. It can be a hinge point, sliding groove, screw push point or pin positioning hole to realize continuous or graded adjustment of angle.

[0152] The fixed bracket 61 can be a steel structure gantry, box-type support frame or adjustable truss, and the material can be welded steel parts, welded thick-walled steel pipe parts or high-strength steel plate assemblies; the clamp-type tooling 62 can be a split clamp, ring clamp or arc-shaped clamping seat, and the material can be steel parts, cast steel parts or high-strength alloy parts; the angle adjustment and locking mechanism 63 can be a jack-type adjusting rod, screw adjusting assembly, gear rack mechanism or pin positioning mechanism, and can be replaced with hydraulic jacking parts, screw jacking parts or multi-point adjustable hinge assembly according to construction needs.

[0153] During the operation, the fixed support 61 is first fixed to the construction ground at the predetermined position to form a stable load-bearing frame. Then, the clamp-type tool 62 is fitted and tightened on the outer wall of the hollow pipe. The steel pipe column is partially fixed to the adjustable point through the circumferential clamping action of the clamp. Subsequently, the angle adjustment and locking mechanism 63 set between the clamp-type tool 62 and the fixed support 61 is operated to make the clamp-type tool 62 rise, swing or rotate slightly relative to the fixed support 61, thereby driving the hollow pipe to gradually adjust to the preset tilt angle between it and the horizontal plane, and locking is completed after the target angle is reached.

[0154] The fixed bracket 61 provides stable ground support, and the clamp-type tooling 62 forms a reliable covering for the outer wall of the steel pipe column. The angle adjustment and locking mechanism 63 between the two can provide controllable displacement during the adjustment stage and rigid constraint during the positioning stage. Therefore, the hollow pipe can complete the establishment of the tilt posture without relying on long-term hoisting and suspension, and maintain the stability of the posture during the subsequent grouting, venting and overflow monitoring process. This reduces the occupation of construction equipment and the difficulty of on-site coordination, reduces the risk of uneven internal filling, changes in grouting path and local air accumulation caused by posture deviation, and improves the controllability of the hollow pipe concrete pouring process and the quality of the finished product.

[0155] Through the above technical solution, the fixing fixture 6, composed of a fixed bracket 61 and a clamp-type fixture 62, combined with an angle adjustment and locking mechanism 63, can provide a solid and adjustable support for the hollow tube. This avoids the problems of angle deviation or insufficient stability that may exist in traditional fixing methods, and ensures that the concrete can be continuously and evenly filled from bottom to top along the axial direction of the hollow tube. This effectively avoids the formation of voids or incomplete pouring inside the concrete, and also facilitates the smooth discharge of air and excess concrete, thereby significantly improving the quality and efficiency of concrete pouring.

[0156] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A method for concrete pouring of hollow steel pipe columns, characterized in that, Includes the following steps: The hollow tube to be poured is arranged at an angle so that the axial direction of the hollow tube forms a preset angle with the horizontal plane, and the tilting direction is towards the lower end of the hollow tube. The hollow tube is held in the tilted state by a fixing fixture. Concrete is injected through a grouting port located at the lower end of the hollow tube, so that the concrete continuously fills the hollow tube from bottom to top. During the concrete filling process, air and / or excess concrete are discharged from the grout outlet located at the higher end of the hollow tube. The monitoring system installed on the hollow pipe can monitor the overflow status of concrete in real time and provide feedback on the monitoring information.

2. The method for concrete pouring of hollow steel pipe columns according to claim 1, characterized in that, It also includes the following steps: Before pouring, seal the suction pipe of the exhaust device to the slurry outlet and start the exhaust device to perform vacuum treatment inside the hollow tube. The monitoring system collects the exhaust status at the slurry outlet in real time and feeds back the monitoring information to determine the air discharge situation inside the hollow tube. During the pouring process, the monitoring system simultaneously monitors the concrete overflow status and the accompanying air venting. When it is detected that only concrete continuously overflows from the outlet and no obvious air bubbles are discharged, it is determined that the air venting is sufficient. If air bubbles are continuously discharged from the grout outlet or concrete overflow is discontinuous, the monitoring system will report the abnormal information and adjust the pouring speed and / or continue to evacuate until the air bubbles are completely discharged.

3. The method for concrete pouring of hollow steel pipe columns according to claim 1, characterized in that, The hollow tube includes an inner tube and an outer tube. The inner tube is coaxially arranged inside the outer tube, and a casting cavity is formed between the inner tube and the outer tube. Baffles are provided on both sides of the outer tube to seal the casting cavity. The grouting port and the grouting outlet are respectively provided on the two baffles.

4. The method for concrete pouring of hollow steel pipe columns according to claim 2, characterized in that, It also includes the following steps: The monitoring probe of the monitoring system is set at the grout outlet to collect real-time air release status parameters and concrete overflow status parameters. The monitoring system includes a monitoring probe, a signal transmission module, and a controller. The controller is electrically connected to the monitoring probe and the exhaust device respectively, and the parameters collected by the monitoring probe are transmitted to the controller through the signal transmission module; The controller receives parameters collected by the monitoring probe and controls the start / stop of the exhaust device and the vacuum negative pressure value according to preset conditions. When the monitoring probe detects that no air bubbles are being discharged from the grout outlet and concrete is continuously overflowing, the exhaust device is shut off via the controller. When the monitoring probe detects continuous bubble discharge, the controller increases the vacuum negative pressure or extends the vacuuming time.

5. The method for concrete pouring of hollow steel pipe columns according to claim 4, characterized in that, It also includes the following steps: When the controller determines that the concrete overflow status parameter indicates that the concrete overflow is discontinuous, the controller automatically reduces the pouring speed. When the controller determines that the parameters collected by the monitoring probe exceed a preset threshold, the controller automatically performs an anomaly handling operation. The abnormal handling operations include: issuing an alarm signal, suspending pouring, or deactivating the automatic control of the controller.

6. The method for concrete pouring of hollow steel pipe columns according to claim 2, characterized in that, A funnel is provided on the slurry outlet, and the suction pipe of the exhaust device is connected to the funnel through a sealing element. The upper opening of the funnel is higher than the end of the higher end of the hollow tube. During the vacuuming and pouring process, air is discharged through the funnel, and the overflowing concrete flows into the funnel.

7. The method for concrete pouring of hollow steel pipe columns according to claim 6, characterized in that, The funnel is provided with a transparent observation window, and the method further includes the following steps: During the pouring process, the overflow status of the concrete is observed in real time through the transparent observation window. When a continuous and full overflow of concrete is observed, it is determined that the filling inside the hollow tube is complete.

8. The method for concrete pouring of hollow steel pipe columns according to claim 1 or 2, characterized in that, It also includes at least one of the following steps: After the pouring is completed, the temperature difference between the two ends of the hollow tube is measured to determine the uniformity of the concrete filling inside the hollow tube. After the pouring is completed, the uniformity of the concrete filling inside the hollow tube is determined by tapping and listening to the sound.

9. The method for concrete pouring of hollow steel pipe columns according to claim 1 or 2, characterized in that, The grouting port is provided with a check structure, which includes a valve body, a valve plate and a return spring. The valve body is connected to the grouting port, and the valve plate is rotatably or slidably disposed in the valve body. One end of the return spring is connected to the valve body, and the other end is connected to the valve plate. During concrete injection, the injection pressure overcomes the elastic force of the return spring and pushes the valve plate open; When the injection stops, the spring force of the reset spring and the weight of the concrete cause the valve plate to reset and close.

10. The method for concrete pouring of hollow steel pipe columns according to claim 1, characterized in that, The fixing fixture includes a fixing bracket and a clamp-type fixture; the method further includes the following steps: Fix the fixed bracket to the construction ground; The clamp-type tool is clamped tightly to the outer wall of the hollow tube; The hollow tube is adjusted and locked to the preset tilt angle by means of the angle adjustment and locking mechanism set between the clamp-type tooling and the fixed bracket.

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