Construction method of intelligent spraying maintenance system of cast-in-place concrete anti-collision wall

Abstract

The invention relates to a construction method of an intelligent spraying maintenance system of a cast-in-place concrete anti-collision wall, and aims at intelligent spraying maintenance construction of the cast-in-place concrete anti-collision wall, a channel steel track is laid on a bridge, the intelligent spraying maintenance system is installed on the upper portion of the channel steel track, and walking wheels, a walking motor and a bottom cross beam are installed on the lower portion of the intelligent spraying maintenance system. A water storage tank, a cable drum and a main stand column are arranged on the upper portion of the bottom cross beam, a flow control water pump, a water level sensor and a water pipe are installed in the water storage tank, a main cross beam, a hanging rod and a control system are arranged on the upper portion of the intelligent spraying maintenance system, and a walking controller, a flow controller and a cable drum controller are arranged in the control system. A camera is arranged on the water pipe fixing hanging bracket, a spraying opening is formed in the water pipe outside the anti-collision wall, and a falling water collecting groove is formed in the outer side of the intelligent spraying maintenance system. The method can effectively reduce the engineering cost and accelerate the construction speed, and can obtain better technical and economic benefits when being applied to actual engineering.

Description

Technical Field

[0001] The invention relates to a construction method of an intelligent spraying and curing system for a cast-in-place concrete anti-collision wall, belongs to the field of civil engineering, and is suitable for the construction of an intelligent spraying and curing system for a cast-in-place concrete anti-collision wall. Background Art

[0002] During construction, the anti-collision guardrail of the bridge has always been maintained by manual sprinkling. However, due to untimely manual maintenance, insufficient maintenance time or maintenance frequency, local concrete maintenance is not in place. If it cannot be effectively controlled, it may cause the concrete strength of the anti-collision guardrail to fail to meet the design requirements, cracks to appear on the surface, and other defects. When sprinkling water on the outside of the anti-collision guardrail, construction workers need to lean outside to sprinkle water, which poses a certain safety risk. The use of the anti-collision wall intelligent spray maintenance system greatly reduces the construction risk factor.

[0003] Conventional maintenance construction methods have problems such as untimely manual maintenance, insufficient maintenance time or maintenance frequency, resulting in inadequate local concrete maintenance. If it cannot be effectively controlled, it may cause the concrete strength of the anti-collision guardrail to fail to meet the design requirements, cracks to appear on the surface and other defects. Summary of the invention

[0004] The purpose of the present invention is to provide a construction method of an intelligent spraying maintenance system for a cast-in-place concrete crash wall in order to solve the problem of the construction of an intelligent spraying maintenance system for a cast-in-place concrete crash wall and meet the needs of structural construction.

[0005] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0006] The construction method of the intelligent spraying maintenance system for cast-in-place concrete anti-collision wall comprises the following steps:

[0007] Step 1: Intelligent spray maintenance system structure design:

[0008] Carry out structural design for the intelligent sprinkler maintenance system and determine the installation size and location of the structure;

[0009] Step 2: Main structure installation:

[0010] Carry out the structural installation of the intelligent spray maintenance system, lay the channel steel track on the bridge, and install the travel wheels, travel motors and bottom beams at the bottom of the intelligent spray maintenance system;

[0011] A water storage tank, a cable drum and a main column are installed on the upper part of the bottom cross beam, and a flow control water pump, a water level sensor and a water pipe are installed inside the water storage tank;

[0012] Install the main beam, suspension rod and control system on the upper part of the intelligent spray maintenance system, and install the travel controller, flow controller and cable drum controller inside the control system;

[0013] Install a water pipe fixing hanger, water pipe and sprinkler port at the bottom of the hanger, install a camera on the water pipe fixing hanger, and install a falling water collection tank outside the intelligent sprinkler maintenance system;

[0014] Step 3: System debugging:

[0015] The intelligent spray maintenance system is controlled by the water level sensor and the travel controller to move to the water adding position for water adding;

[0016] The cable retraction and extension during the movement of the sprinkler system are controlled through the travel controller and the cable drum controller;

[0017] The flow controller and the flow control water pump are used to control the spraying water volume according to the color depth of the concrete of the crash wall in the photo taken by the camera;

[0018] Step 4: Spraying maintenance construction:

[0019] An intelligent spray maintenance system is used. After water is automatically added to the water tank through the control system, it will automatically start walking within the set spray cycle to spray and maintain the crash barrier.

[0020] Furthermore, the method further includes step 5: enclosing and protecting the crash wall:

[0021] Steel protection brackets and geotextiles are installed on the outside of the crash barrier for protection, and steel wire ropes and counterweights are set on the top of the geotextile for fixation.

[0022] Furthermore, in step one, according to the size of the crash barrier and the on-site construction conditions, a simulation analysis is performed using modeling software to determine the overall layout of the intelligent spray maintenance system and the installation dimensions of each component. At the same time, the laying position of the channel steel track is determined, and it is laid along the edge of the bridge on the inner side of the crash barrier. The track spacing is set according to the size of the running wheels and the system stability requirements.

[0023] Furthermore, in step three, the water level sensor monitors the water level changes in the water tank in real time. When the water level is lower than the set water adding threshold, the signal is sent to the travel controller, and the travel controller drives the travel motor to move the intelligent sprinkler maintenance system along the channel steel track to the designated water adding position.

[0024] Furthermore, in step three, when the intelligent sprinkler maintenance system starts moving, the walking controller sends a walking signal to the cable reel controller. The cable reel controller senses the cable tension changes through the tension sensor according to the walking direction and speed of the system, and automatically adjusts the retraction and release speed to ensure that the cable is always in a suitable tension state.

[0025] Furthermore, in step three, the camera captures the surface condition of the crash barrier in real time and transmits the captured image to the control system. The control system uses an image analysis algorithm to analyze the difference between the color depth of the crash barrier concrete and the preset standard color depth, and uses a flow controller to adjust the flow of the flow control pump according to the degree of difference, thereby achieving precise control of the spray water volume.

[0026] Compared with the prior art, the present invention has the following characteristics and beneficial effects:

[0027] 1. More uniform and sufficient maintenance: The existing manual watering maintenance method is greatly affected by human factors, and it is difficult to ensure the uniformity and comprehensiveness of each watering. The intelligent spraying maintenance system of the present invention can achieve comprehensive and uniform spraying of the crash barrier by reasonably arranging water pipes and spraying ports at the bottom of the hanger, ensuring that the concrete always maintains a suitable humidity environment during the maintenance period, which is conducive to the stable growth of concrete strength and reduces the problem of insufficient strength caused by inadequate maintenance.

[0028] 2. Improve appearance quality: It is difficult to accurately control the amount and frequency of watering during manual maintenance, which may lead to uneven wetness and dryness of the concrete surface, and then cause appearance defects such as cracking and pockmarks. The present invention can accurately control the amount of water sprayed by the flow controller and the flow control water pump according to the color depth of the concrete of the crash wall in the photo taken by the camera, effectively avoiding the influence of excessive or insufficient water for maintenance on the appearance quality of the concrete, making the appearance of the crash wall more flat and smooth without obvious cracks and defects.

[0029] 3. Reduce personnel risks: When watering the outside of the traditional anti-collision guardrail for maintenance, construction workers need to lean out to operate, which poses safety risks such as falling from height. However, with the intelligent spray maintenance system of the present invention, construction workers do not need to perform watering operations in dangerous locations, which greatly reduces the safety risk factor during the construction process and ensures the life safety of construction workers.

[0030] 4. Save water resources: It is often difficult to accurately control the amount of water used for manual watering maintenance, which easily leads to waste of water resources. The system of the present invention can reasonably allocate water resources according to actual needs through precise flow control and intelligent spraying management, thus avoiding waste and improving the utilization efficiency of water resources.

[0031] 5. Reduce labor costs: Conventional manual maintenance requires a lot of manpower for regular watering, and problems such as untimely manual maintenance, insufficient maintenance time or maintenance frequency are difficult to avoid. The intelligent spray maintenance system of the present invention can automatically complete the watering and spray maintenance operations, reducing dependence on manual labor, reducing labor costs, and improving the efficiency and quality of maintenance work.

[0032] 6. Precise maintenance control: The system of the present invention can monitor and automatically adjust various parameters in the maintenance process, such as water level, travel position, spray water volume, etc., through a control system composed of a water level sensor, a travel controller, a flow controller, etc., in real time, thus realizing intelligent and automated maintenance work. In contrast, existing maintenance methods are difficult to reach the level of the present invention in terms of control accuracy and timeliness.

[0033] 7. Remote monitoring and management: The operation status of the intelligent sprinkler maintenance system can be monitored and managed in real time through the remote monitoring system, which is convenient for construction personnel to understand the maintenance status in time, find problems and deal with them in time. However, traditional maintenance methods have great limitations in this regard, and it is difficult to obtain maintenance information in time and manage effectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is the construction structure diagram of the intelligent spraying maintenance system for cast-in-place concrete crash wall;

[0035] Figure 2 It is a structural diagram of a cast-in-place concrete crash wall protection device.

[0036] In the figure: 1. Intelligent spray maintenance system; 2. Control system; 3. Main column; 4. Water storage tank; 5. Cable drum; 6. Travel wheel; 7. Channel steel track; 8. Drive shaft; 9. Travel motor; 10. Flow control water pump; 11. Water level sensor; 12. Bridge; 13. Falling water collection trough; 14. Water pipe fixing hanger; 15. Spray nozzle; 16. Water pipe; 17. Camera; 18. Anti-collision wall; 19. Hanging rod; 20. Main beam; 21. Bottom beam; 22. Travel controller; 23. Flow controller; 24. Cable drum controller; 25. Steel protection bracket; 26. Ballast weight; 27. Counterweight; 28. Wire rope; 29. ​​Geotextile; 30. External protection frame. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0038] Those skilled in the art should understand that, in the disclosure of the present application, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present application.

[0039] Example 1

[0040] Figure 1 This is the construction structure diagram of the intelligent spraying maintenance system 1 for cast-in-place concrete crash wall. Figure 2 It is a structural diagram of a cast-in-place concrete crash wall protection device.

[0041] like Figure 1 The construction structure diagram of the cast-in-place concrete crash barrier wall intelligent spraying and maintenance system 1 shown mainly includes an intelligent spraying and maintenance system 1, a control system 2, a water storage tank 4, a cable reel 5, a walking wheel 6, a channel steel track 7, a walking motor 9; a flow control water pump 10, a water level sensor 11, a bridge 12, a falling water collection trough 13, a spray port 15, a water pipe 16, a camera 17, a crash barrier 18, a walking controller 22, a flow controller 23, and a cable reel controller 24. For the intelligent spraying maintenance construction of the cast-in-place concrete crash barrier 18, a channel steel track 7 is laid on the bridge 12, and an intelligent spraying maintenance system 1 is installed on the upper part of the channel steel track 7, and a walking wheel 6, a walking motor 9 and a bottom cross beam 21 are installed on the lower part of the intelligent spraying maintenance system 1. A water storage tank 4, a cable drum 5 and a main column 3 are arranged on the upper part of the bottom cross beam 21, and a flow control water pump 10, a water level sensor 11 and a water pipe 16 are installed inside the water storage tank 4. A main cross beam 20, a hanger 19 and a control system 2 are arranged on the upper part of the intelligent spraying maintenance system 1, and a walking controller 22, a flow controller 23 and a cable drum controller 24 are arranged inside the control system 2. A water pipe fixing hanger 14 is arranged at the lower part of the hanger 19, and a camera 17 is arranged on the water pipe fixing hanger 14. A spray port 15 is arranged on the water pipe 16 on the outer side of the crash barrier 18, and a falling water collection trough 13 is arranged on the outer side of the intelligent spraying maintenance system 1.

[0042] like Figure 2 The structure diagram of the protective device of the cast-in-place concrete crash barrier 18 is shown, in which a steel protection bracket 25 and a geotextile 29 are arranged on the outside of the crash barrier 18 for protection, a walking wheel 6 and a channel steel track 7 are arranged at the lower part of the steel protection bracket 25, a counterweight 26 is arranged in the middle part of the steel protection bracket 25, an outer protection frame 30 is arranged on the outside of the steel protection bracket 25, a geotextile 29 is laid on the outside of the steel protection bracket 25, and a steel wire rope 28 and a counterweight 27 are arranged on the upper part of the geotextile 29 for fixing.

[0043] The main construction process of the cast-in-place concrete crash wall 18 intelligent spraying maintenance system 1 is as follows:

[0044] Step 1: Structural design of the intelligent sprinkler maintenance system 1: Structural design of the intelligent sprinkler maintenance system 1 to determine the installation size and position of the structure;

[0045] Step 2, main structure installation: install the structure of the intelligent spray maintenance system 1, lay the channel steel track 7 on the bridge 12, install the walking wheel 6, the walking motor 9 and the bottom beam 21 at the bottom of the intelligent spray maintenance system 1, install the water storage tank 4, the cable drum 5 and the main column 3 on the top of the bottom beam 21, install the flow control water pump 10, the water level sensor 11 and the water pipe 16 inside the water storage tank 4, install the main beam 20, the suspension rod 19 and the control system 2 on the top of the intelligent spray maintenance system 1, install the walking controller 22, the flow controller 23 and the cable drum controller 24 inside the control system 2, install the water pipe fixing hanger 14, the water pipe 16 and the spray port 15 at the bottom of the suspension rod 19, install the camera 17 on the water pipe fixing hanger 14, and install the falling water collection trough 13 on the outside of the intelligent spray maintenance system 1;

[0046] Step 3, system debugging: Control the intelligent spray maintenance system 1 to move to the water adding position to add water through the water level sensor 11 and the travel controller 22, control the cable retraction and release during the spray system walking process through the travel controller 22 and the cable reel controller 24, and control the flow controller 23 and the flow control water pump 10 to control the spray water volume according to the color depth of the concrete of the anti-collision wall 18 in the photo taken by the camera 17;

[0047] Step 4: Spraying maintenance construction: The intelligent spraying maintenance system 1 is used to automatically add water to the water storage tank 4, and then automatically start walking within the set spraying cycle to spray the crash barrier 18 for maintenance;

[0048] Step 5: Enclosed protection of the crash barrier 18: A steel protection bracket 25 and a geotextile 29 are installed on the outside of the crash barrier 18 for protection, and a steel wire rope 28 and a counterweight 27 are arranged on the top of the geotextile 29 for fixing.

[0049] Example 2

[0050] 1. Project Overview

[0051] This embodiment is applied to the maintenance project of the crash barrier 18 of a cross-river bridge in a certain city. The total length of the bridge is [X] meters, and the crash barrier 18 is arranged along both sides of the bridge. The crash barrier 18 is 1.2 meters high and 0.3 meters thick, and its length is consistent with the length of the bridge. The climate in the construction site is changeable, with high temperatures in summer, the highest temperature can reach above 40°C; it is relatively cold in winter, the lowest temperature can reach around -5°C, and there are occasional strong winds.

[0052] 2. Construction method and implementation steps of cast-in-place concrete crash wall 18 intelligent spraying maintenance system 1

[0053] (I) Design of intelligent spray maintenance system 1

[0054] According to the size of the crash barrier 18 and the on-site construction conditions, the overall layout of the intelligent spray maintenance system 1 and the installation dimensions of each component are determined by simulation analysis using modeling software. The total length of the system is designed to be slightly longer than the length of the crash barrier 18 of the bridge to allow for full coverage for maintenance, and is determined to be [X+5] meters (considering a certain amount of coverage margin at both ends). The system height is set to 2.5 meters based on the installation requirements of each component and the principle of ease of operation.

[0055] The laying position of the channel steel track 7 is determined, and it is laid along the edge of the bridge 12 on the inner side of the crash barrier 18. The track spacing is set to 1.2 meters according to the size of the running wheels 6 and the system stability requirements.

[0056] (II) Installation of the main structure

[0057] 1. Installation of basic components

[0058] Accurately lay the channel steel track 7 on the bridge 12 according to the design requirements, select channel steel with the specification of [specific channel steel specifications, such as 10# channel steel], ensure that the track surface is flat and the straightness meets the requirements, and provide a smooth running track for the walking wheel 6.

[0059] The travel wheels 6 , the travel motor 9 and the bottom cross beam 21 are installed at the lower part of the intelligent spray maintenance system 1 .

[0060] The travel wheel 6 is a heavy-duty industrial caster with a wheel diameter of 30 cm, which has good wear resistance and load-bearing capacity. The rated load-bearing capacity of each travel wheel 6 is 5 tons, and a reliable electromagnetic brake device is installed.

[0061] The selection of the travel motor 9 is based on the travel speed and driving force required by the system. This project requires the maximum travel speed of the system to be 5 meters per minute. Considering the total weight of the system (estimated to be about [specific weight] tons) and track friction and other factors, a 3-kilowatt variable frequency speed-regulating motor is selected. This motor has good speed regulation performance and overload protection capabilities, which can ensure that the system can travel smoothly and safely under different working conditions.

[0062] The bottom cross beam 21 is made of Q345B steel, with a cross-sectional size of [specific size, such as 300mm×200mm×10mm], and a length that is consistent with the total length of the system, which is [X+5] meters. It is firmly connected to the top of the running wheel 6 by welding or other means to provide a stable support foundation for the upper components.

[0063] 2. Middle parts installation

[0064] A water storage tank 4 , a cable drum 5 and a main column 3 are installed on the upper part of the bottom cross beam 21 .

[0065] Water tank 4:

[0066] The capacity of the water storage tank 4 is calculated based on the size of the crash wall 18 and the expected spraying cycle, spraying water volume and other factors. After detailed calculation, considering the length and height of the crash wall 18 of this project and the water loss of concrete under local climatic conditions, the capacity of the water storage tank 4 is determined to be 2 cubic meters.

[0067] The water storage tank 4 is made of food-grade stainless steel, specifically SUS304 stainless steel, which has excellent corrosion resistance, can be used stably for a long time in the complex environment of the construction site, and will not cause pollution to the maintenance water.

[0068] A flow control water pump 10 , a water level sensor 11 and a water pipe 16 are installed inside the water storage tank 4 .

[0069] The flow control water pump 10 is a centrifugal water pump with a head of 20 meters and a flow rate of 5 cubic meters per hour. The water pump has a precise flow regulation function and can meet the control requirements of the spray water volume at different stages.

[0070] The water level sensor 11 uses a high-precision water level sensor 11 with a measurement accuracy of ±0.5 cm, which can accurately monitor the water level changes in the water storage tank 4 and promptly trigger the system's water addition operation or issue an alarm for low water level.

[0071] The water pipe 16 uses a PPR pipe with a diameter of DN50 to ensure that water can flow smoothly in the system.

[0072] Cable reel 5:

[0073] The cable is retracted and released by means of electric drive combined with tension sensor control. When the system moves, the cable reel 5 senses the change in cable tension through the tension sensor according to the direction and speed of the system, and automatically adjusts the retraction and release speed to ensure that the cable is always in a suitable tension state to prevent the cable from being entangled or broken.

[0074] The maximum moving distance of the system in this project is [X+5] meters. Taking into account a certain margin, the cable reel 5 should be able to withstand a cable with a length of [X+10] meters, a specification of 4 cores, and a cross-sectional area of ​​10 square millimeters to meet the power and signal transmission needs of the system within the entire construction range.

[0075] Main column 3:

[0076] Q235B steel is used to make the main column 3, which has a height of 2 meters and a cross-sectional size of [specific size, such as 150mm×150mm×8mm]. It is vertically installed above the bottom beam 21 by welding or other means to provide a stable support connection point for the upper components.

[0077] 3. Upper component installation

[0078] A main crossbeam 20 , a suspension rod 19 and a control system 2 are installed on the upper part of the intelligent spray maintenance system 1 , and a travel controller 22 , a flow controller 23 and a cable drum controller 24 are installed inside the control system 2 .

[0079] Main beam 20:

[0080] It is made of Q345B steel, with a length of [X+5] meters and a cross-sectional size of [specific size, such as 300mm×200mm×10mm]. It is firmly connected to the top of the main column 3 by welding and other means to ensure the overall strength and rigidity of the system, and can fully cover the crash barrier 18 for spray maintenance.

[0081] Boom 19:

[0082] The model is selected according to the distance between the main crossbeam 20 and the spray port 15 (about 1.5 meters) and the load to be borne (including the weight of the water pipe 16 and the nozzle, etc.). The 304 stainless steel material is used to make the suspension rod 19, which has a diameter of 25 mm and has good corrosion resistance and sufficient strength to ensure that the water pipe 16 and the nozzle can be stably suspended.

[0083] Control System 2:

[0084] The walking controller 22 is programmed according to the characteristics of the walking motor 9 and the walking requirements of the system, and realizes the speed regulation, start and stop control functions of the walking motor 9, so as to ensure that the system can walk according to the predetermined route and speed. For example, the acceleration time when the system starts is set to 5 seconds, and the walking speed is maintained at a constant speed after reaching the maximum speed, and when approaching the endpoint, it starts to decelerate 3 meters in advance until it stops.

[0085] The flow controller 23 is programmed according to the characteristics of the flow control water pump 10 and the control requirements of the spray water volume at different stages to realize the flow regulation function of the flow control water pump 10. The spray water volume is precisely controlled by analyzing the color depth of the concrete of the crash barrier 18 in the photo taken by the camera 17.

[0086] The cable reel controller 24 is programmed according to the characteristics of the cable reel 5 and the cable retraction and release requirements during the system movement, and realizes the cable retraction and release control function of the cable reel 5 to ensure that the cable reel 5 can accurately retract and release the cable according to the movement of the system.

[0087] A water pipe fixing hanger 14 , a water pipe 16 and a spray port 15 are installed at the lower part of the suspension rod 19 , a camera 17 is installed on the water pipe fixing hanger 14 , and a falling water collection trough 13 is installed on the outer side of the intelligent spray maintenance system 1 .

[0088] Water pipe fixing hanger 14:

[0089] It is designed and manufactured according to the pipe diameter (DN50), weight and installation position requirements of the water pipe 16. It is made of high-strength aluminum alloy and has an overall dimension of [specific dimensions, such as 300mm×200mm×20mm]. It has sufficient strength and stability to ensure that the water pipe 16 can be firmly fixed to prevent the water pipe 16 from shaking or falling off during system operation.

[0090] Water pipe 16:

[0091] Choose PPR pipes with a diameter of DN50 to ensure that water can flow smoothly in the system.

[0092] Spray port 15:

[0093] A fan-shaped nozzle with good atomization effect and adjustable spray angle is selected. The nozzle diameter is 8 mm. The angle of the nozzle can be adjusted to achieve uniform spraying on different parts of the crash barrier 18, thereby improving the maintenance effect.

[0094] Camera 17:

[0095] A high-definition, waterproof and dustproof industrial-grade camera 17 with a resolution of 1080P pixels is selected to clearly capture the surface condition of the anti-collision wall 18 and provide accurate image information for the flow controller 23 to control the amount of spray water.

[0096] Falling water collection tank 13:

[0097] Made of fiberglass, its dimensions are [X+5] meters long, 0.5 meters wide and 0.3 meters high. It can collect all or most of the water falling after the system sprays for recycling or proper discharge.

[0098] (III) System debugging

[0099] 1. Water addition control debugging

[0100] The water level sensor 11 monitors the water level changes in the water tank 4 in real time. When the water level is lower than the set water adding threshold (such as lower than 0.5 meters), a signal is sent to the travel controller 22. The travel controller 22 drives the travel motor 9 to move the system along the channel steel track 7 to the designated water adding position (close to the water supply point at the construction site, about [X] meters away from the initial position of the system), ensuring that the system can replenish water in time and maintain normal spraying maintenance operations.

[0101] 2. Cable retraction and release control debugging

[0102] When the system starts to move, the travel controller 22 sends a travel signal to the cable reel controller 24. The cable reel controller 24 senses the change in cable tension through the tension sensor according to the travel direction and speed of the system, and automatically adjusts the retraction and release speed to ensure that the cable is always in a suitable tension state, prevent the cable from being entangled or broken, and ensure the continuity of power and signal transmission during the movement of the system.

[0103] 3. Spray water volume control debugging

[0104] The camera 17 takes real-time photos of the surface condition of the crash barrier 18 and transmits the captured images to the control system 2. The control system 2 uses an image analysis algorithm to analyze the difference between the color depth of the crash barrier 18 concrete and the preset standard color depth, and uses the flow controller 23 to adjust the flow of the flow control pump 10 according to the degree of difference, thereby achieving precise control of the spray water volume. For example, when the color depth of the crash barrier 18 concrete is relatively light, it means that the concrete is lacking in water, and the flow controller 23 will increase the flow of the flow control pump 10 to increase the spray water volume; conversely, when the color depth of the crash barrier 18 concrete is relatively dark, it means that the concrete has sufficient water, and the flow controller 23 will reduce the flow of the flow control pump 10 to reduce the spray water volume. In this project, the preset standard color depth is determined based on the color sample of the crash barrier 18 concrete after full maintenance.

[0105] The general steps of the image analysis algorithm are as follows:

[0106] 1) Feature extraction: For the preprocessed grayscale image, a feature extraction method based on pixel values ​​is used. Traverse each pixel in the image and obtain its grayscale value as the color feature value of the point. Divide the area of ​​the entire surface of the anti-collision wall 18 in the image into several small sub-regions (for example, divide an image into 10×10 sub-regions of equal size), and calculate the average grayscale value of all pixels in each sub-region as the color depth feature value of the sub-region. In this way, by dividing the surface of the anti-collision wall 18 into multiple sub-regions and extracting their color depth feature values, the color conditions of different parts of the anti-collision wall 18 can be reflected more comprehensively and meticulously.

[0107] 2) Comparison with standard color depth: In the system initialization stage, by photographing the crash barrier 18 sample that has been fully maintained and reached an ideal state, and obtaining the standard color depth feature values ​​of each sub-region thereof according to the above-mentioned feature extraction method, these values ​​are stored in the system as preset standard color depth data. In the actual maintenance process, for each collected and processed image, the color depth feature values ​​of each sub-region thereof are compared one by one with the corresponding preset standard color depth feature values.

[0108] 3) Difference calculation: Calculate the color depth difference value of each sub-area, and use the absolute value of the difference to measure the degree of difference. That is, the color depth difference value of a sub-area = the actual color depth characteristic value of the sub-area - the corresponding preset standard color depth characteristic value. By calculating the difference values ​​of all sub-areas, the deviation of different parts of the surface of the crash wall 18 from the standard maintenance state can be fully understood.

[0109] 4) Difference degree grading: The difference degree is graded according to the calculated color depth difference value. For example, the difference value is divided into the following three levels:

[0110] When the difference value is less than or equal to 5 (assuming the grayscale value range is 0-255), it is judged as a slight difference in color depth, indicating that the moisture condition of the concrete in this sub-area is basically close to the ideal state, and there is no need to make significant adjustments to the spraying water volume.

[0111] When the difference value is greater than 5 and less than or equal to 15, it is judged as a moderate difference in color depth, indicating that the concrete in this sub-area may be slightly lacking in water or slightly having too much water, and the amount of spraying water needs to be adjusted appropriately.

[0112] When the difference value is greater than 15, it is judged as a severe difference in color depth, which means that the concrete in this sub-area is obviously lacking in water or has too much water, and the amount of spray water needs to be adjusted significantly.

[0113] 5) Flow regulation strategy: According to the classification results of the difference degree, formulate the corresponding flow regulation strategy of the flow control water pump 10.

[0114] For sub-areas with slight differences in color depth, the flow rate of the current flow control water pump 10 is kept unchanged, and maintenance is continued in the original spraying method.

[0115] For the sub-area with moderate color depth difference, if the actual color depth characteristic value is less than the preset standard color depth characteristic value (i.e., the concrete lacks water), the flow rate of the flow control water pump 10 is increased by 10%-20% (the specific increase ratio can be further optimized and determined according to the actual situation); if the actual color depth characteristic value is greater than the preset standard color depth characteristic value (i.e., the concrete has too much water), the flow rate of the flow control water pump 10 is reduced by 10%-20%.

[0116] For sub-areas with severe color depth differences, if the actual color depth characteristic value is less than the preset standard color depth characteristic value (i.e., the concrete lacks water), the flow rate of the flow control water pump 10 is increased by 30%-50%; if the actual color depth characteristic value is greater than the preset standard color depth characteristic value (i.e., the concrete has too much water), the flow rate of the flow control water pump 10 is reduced by 30%-50%.

[0117] Through the above image analysis algorithm and the corresponding flow regulation strategy, the intelligent spray maintenance system 1 can accurately adjust the flow of the flow control water pump 10 according to the actual color depth of the concrete of the crash barrier 18, thereby achieving effective control of the spray water volume and ensuring the best maintenance effect of the concrete of the crash barrier 18.

[0118] (IV) Spraying maintenance construction

[0119] The intelligent spraying maintenance system 1 is used to automatically add water to the water storage tank 4 through the control system 2, and then the system automatically starts to move within the set spraying cycle to spray and maintain the crash barrier 18.

[0120] Taking into account the local climatic conditions, in the hot summer (the highest temperature can reach over 40°C) and low humidity, the concrete loses water quickly, and the spraying cycle is set to once every 2 hours; in the cold winter (the lowest temperature can reach around -5°C) and high humidity, the concrete loses water slowly, and the spraying cycle is set to once every 6 hours.

[0121] During the spraying maintenance process, the spraying water volume, spraying cycle and other parameters are adjusted in a timely manner according to the surface condition of the anti-collision wall 18 photographed by the camera 17 and various monitoring data (such as water level, flow rate, etc.) during the operation of the system to ensure the best maintenance effect of the concrete of the anti-collision wall 18. For example, if it is found that the color of a certain area on the surface of the anti-collision wall 18 becomes significantly lighter, it means that the area is short of water, and the spraying water volume of the area can be appropriately increased.

[0122] (V) Crash wall 18 closed protection

[0123] A steel protection support 25 and a geotextile 29 are installed on the outer side of the anti-collision wall 18 for protection, and a steel wire rope 28 and a counterweight 27 are arranged on the upper part of the geotextile 29 for fixing.

[0124] Steel protection bracket 25:

[0125] It is made of Q345B steel, with a height of 1.5 meters and a length consistent with that of the crash barrier 18. It is firmly installed on the outside of the crash barrier 18 by welding and other means, and can fully cover the outside of the crash barrier 18 to prevent damage to the crash barrier 18 caused by external factors.

[0126] Geotextile 29:

[0127] A geotextile 29 of a certain brand with good quality, good air permeability and good waterproofness is selected. The size of the geotextile 29 is determined according to the area and protection requirements of the crash barrier 18, and can effectively prevent the erosion of the crash barrier 18 by dust, rain, etc.

[0128] Wire Rope 28:

[0129] A high-strength, corrosion-resistant steel wire rope 28 of a certain specification is selected, and its length is determined according to the fixing requirements of the geotextile 29 and the size of the protective bracket. It is used to fix the geotextile 29 to prevent the geotextile 29 from being blown up or falling off by the wind.

[0130] Counterweight 27:

[0131] According to the bearing capacity of the steel wire rope 28, the weight of the geotextile 29 and the on-site environmental conditions, a concrete block is selected as the counterweight 27 and placed at the end of the steel wire rope 28 to ensure that the geotextile 29 can be firmly fixed on the protective support.

[0132] III. Implementation of Environmental Adaptability Measures

[0133] (I) Response to low temperature environment

[0134] In terms of the material selection of the water pipe 16, PERT pipe is selected as the material of the water pipe 16. The pipe can still maintain good flexibility in a low temperature environment and is not prone to brittle cracking. At the same time, a rubber-plastic insulation pipe is wrapped around the outside of the water pipe 16 as an insulation material to further enhance the insulation effect of the water pipe 16 and prevent the water in the water pipe 16 from freezing and causing the system to fail to operate normally.

[0135] For the water storage tank 4, an electric heating wire is installed as a heating device. When the ambient temperature is lower than 5°C, the heating device is automatically started to heat the water in the water tank to ensure that the water can be normally transported to the spray port 15 through the water pump for maintenance. In this project, the power of the electric heating wire is determined to be 2 kilowatts based on factors such as the water tank capacity and the local minimum temperature, which can meet the heating requirements for the water in the water tank in a low temperature environment.

[0136] (II) Response to high temperature environment

[0137] A cooling fan is installed near the key components of the system (such as motors, controllers, etc.) as a heat dissipation device. Taking the motor as an example, when the ambient temperature is higher than 40°C, the cooling fan automatically starts to force the motor to dissipate heat, preventing the motor from being damaged due to overheating and affecting the normal operation of the system.

[0138] For the water pipe 16, a heat-insulating coating is applied to the outside of the water pipe 16 to reduce the impact of high temperature on the water temperature in the water pipe 16 and avoid the adverse effect of excessive water temperature on the concrete curing effect. In this project, the selected heat-insulating coating has good heat-insulating performance and can effectively reduce the rising speed of the water temperature in the water pipe 16.

[0139] (III) Response to strong winds

[0140] In the structural design of the system, reinforcing ribs are added to the bottom crossbeam 21, main crossbeam 20 and other parts. The reinforcing ribs of the bottom crossbeam 21 are made of Q235B steel, and their cross-sectional dimensions are [specific dimensions, such as 50mm×50mm×5mm]. They are firmly connected to the bottom crossbeam 21 body through welding and other methods, which increases the strength and rigidity of the bottom crossbeam 21. The reinforcing ribs of the main crossbeam 20 are also made of Q235B steel, and their cross-sectional dimensions and connection methods are similar to those of the reinforcing ribs of the bottom crossbeam 21, ensuring that the system will not shake or fall due to wind force in a strong wind environment.

[0141] Adjust the design of the spray port 15 and adopt a windproof spray port 15, which has a special nozzle structure and can spray water at a more appropriate angle and strength in a strong wind environment, reduce the wind's blowing effect on the spray water flow, and improve the effect of spray maintenance. In this project, the nozzle angle of the selected windproof spray port 15 can be adjusted between 30° and 150°, and the water spray angle can be flexibly adjusted according to the direction and intensity of the strong wind.

[0142] 4. Implementation of the Fault Response Mechanism

[0143] (I) Fault detection

[0144] A variety of fault detection sensors are installed in the system. In addition to the existing water level sensor 11, a motor fault detection sensor, a controller fault detection sensor, etc. are also added.

[0145] The motor fault detection sensor can monitor the motor's current, temperature, speed and other parameters in real time, and send out a fault signal in time when these parameters exceed the normal range. For example, when the motor's current exceeds 120% of its rated current, or the temperature is higher than 80°C of its rated temperature, or the speed is lower than 80% of its rated speed, the motor fault detection sensor will send out a fault signal.

[0146] The controller fault detection sensor can monitor the circuit, signal transmission and other conditions inside the control system 2, and once an abnormality is found, a fault signal is also issued.

[0147] In addition to controlling the amount of water sprayed, the software algorithm can also be used as a means of fault detection to analyze the images captured by the camera 17. For example, when the image captured by the camera 17 is abnormally blurred or distorted in color, it may mean that the camera 17 itself is faulty or the spray port 15 is clogged. At this time, the system should be able to automatically send out a corresponding fault signal.

[0148] (II) Fault warning

[0149] When a fault signal is detected, the system has a timely fault warning function. The sound and light alarm emits obvious alarm sounds and flashing lights at the construction site to remind construction workers to notice the system failure. At the same time, the fault information is sent to the mobile terminal (such as mobile phones, tablets, etc.) of the construction management personnel through the wireless communication module, so that the management personnel can understand the fault situation in time and arrange personnel for maintenance. In this project, the volume of the selected sound and light alarm is 80 decibels, which can attract the attention of construction workers in the noisy environment of the construction site.

[0150] (III) Emergency Response

[0151] When a system fails, corresponding emergency measures are formulated. For example, when a motor failure causes the system to be unable to move normally, a manual mode can be set, and construction personnel can manually operate the running wheel 6 to move the system to a safe position for maintenance. In this project, in order to facilitate the construction personnel to manually operate the running wheel 6, a manual rocker is installed on the running wheel 6, and the construction personnel can control the rotation of the running wheel 6 by turning the manual rocker.

[0152] When the flow control water pump 10 fails, the standby water pump (if equipped) can be temporarily activated to ensure that the spray maintenance work can continue until the failed water pump is repaired or replaced. In this project, the selection of the standby water pump is the same as the main water pump, which is a centrifugal water pump with a head of 20 meters and a flow rate of 5 cubic meters / hour. It can take over its work in time when the main water pump fails to ensure the continuity of the spray maintenance work.

[0153] V. Implementation of the connection with other construction processes

[0154] (I) Connection with the pouring process of crash wall 18

[0155] After the anti-collision wall 18 is poured, wait until the concrete reaches 70% of the design strength before installing the intelligent spray curing system 1. This can avoid disturbing the newly poured concrete due to premature installation and affecting the molding quality of the concrete.

[0156] During the pouring process, embedded parts related to the installation of the intelligent spray curing system 1 are reserved in advance. For example, embedded parts for fixing the running wheels 6 are reserved every 2 meters at the bottom of the inner side of the anti-collision wall 18, and their specifications are [specific specifications, such as bolt holes with a diameter of 20 mm and a depth of 100 mm]; embedded parts for fixing the hanger 19 are reserved every 3 meters at the upper inner side of the anti-collision wall 18, and their specifications are [specific specifications, such as bolt holes with a diameter of 15 mm and a depth of 80 mm], so that the subsequent system installation is more convenient and accurate.

[0157] (II) Connection with the template removal process

[0158] After the formwork is removed, immediately conduct an appearance inspection of the crash barrier 18 and record any possible defects or problems (such as surface cracks, pockmarks, etc.). For example, in this project, several slight cracks and a small amount of pockmarks were found on the surface of the crash barrier 18. Then, based on these conditions, when the intelligent spraying maintenance system 1 is started, parameters such as the spraying water volume and spraying cycle are adjusted in a targeted manner. For the slight cracks found, the spraying water volume was increased by 20%, and the spraying cycle was shortened to once every 1.5 hours to promote the hydration reaction of the concrete and accelerate the healing of the cracks.

[0159] During the operation of the intelligent spray curing system 1, if it is necessary to clean or move the template removal tools, etc., be careful to avoid collision with the running system to ensure the normal operation of the system and the smooth progress of the maintenance work. In this project, warning signs are set up around the template removal tool cleaning site to remind construction personnel to pay attention to protecting the running intelligent spray curing system 1.

[0160] Through the above specific embodiments, we can more clearly understand the application of the construction method of the intelligent spraying maintenance system 1 of the cast-in-place concrete crash barrier 18 in actual projects, as well as the specific implementation details of various measures, so as to better ensure the maintenance quality of the crash barrier 18 concrete and improve the reliability and practicality of the system.

[0161] The parts not described in detail in this application are prior art, so this application does not describe them in detail.

[0162] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0163] Although this article uses more terms such as intelligent sprinkler maintenance system 1, control system 2, main column 3, water storage tank 4, cable drum 5, walking wheel 6, channel steel track 7, transmission shaft 8, walking motor 9, flow control water pump 10, water level sensor 11, bridge 12, falling water collection trough 13, water pipe fixing hanger 14, spray port 15, water pipe 16, camera 17, crash wall 18, hanger 19, main beam 20, bottom beam 21, walking controller 22, flow controller 23, cable drum controller 24, steel protection bracket 25, weight 26, counterweight 27, wire rope 28, geotextile 29, outer protection frame 30, etc., it does not exclude the possibility of using other terms. The use of these terms is only for the purpose of more conveniently describing and explaining the essence of this application; interpreting them as any additional restrictions is contrary to the spirit of this application.

[0164] The present application is not limited to the above-mentioned optimal implementation mode. Anyone can derive other forms of products under the inspiration of this application. However, no matter what changes are made in the shape or structure, all technical solutions that are the same or similar to those of the present application fall within the protection scope of the present application.

Claims

1. The construction method of the intelligent spraying maintenance system for cast-in-place concrete anti-collision wall is characterized by: The following steps are involved: Step 1: Intelligent spray maintenance system structure design: Carry out structural design for the intelligent sprinkler maintenance system and determine the installation size and location of the structure; Step 2: Main structure installation: Carry out the structural installation of the intelligent spray maintenance system, lay the channel steel track on the bridge, and install the travel wheels, travel motors and bottom beams at the bottom of the intelligent spray maintenance system; A water storage tank, a cable drum and a main column are installed on the upper part of the bottom cross beam, and a flow control water pump, a water level sensor and a water pipe are installed inside the water storage tank; Install the main beam, suspension rod and control system on the upper part of the intelligent spray maintenance system, and install the travel controller, flow controller and cable drum controller inside the control system; Install a water pipe fixing hanger, water pipe and sprinkler port at the bottom of the hanger, install a camera on the water pipe fixing hanger, and install a falling water collection tank outside the intelligent sprinkler maintenance system; Step 3: System debugging: The intelligent spray maintenance system is controlled by the water level sensor and the travel controller to move to the water adding position for water adding; The cable retraction and extension during the movement of the sprinkler system are controlled through the travel controller and the cable drum controller; The flow controller and the flow control water pump are used to control the spraying water volume according to the color depth of the concrete of the crash wall in the photo taken by the camera; Step 4: Spraying maintenance construction: An intelligent spray maintenance system is used. After water is automatically added to the water tank through the control system, it will automatically start walking within the set spray cycle to spray and maintain the crash barrier.

2. The construction method of the intelligent spraying and curing system for cast-in-place concrete anti-collision wall according to claim 1 is characterized in that: It also includes step 5, anti-collision wall closure protection: Steel protection brackets and geotextiles are installed on the outside of the crash barrier for protection, and steel wire ropes and counterweights are set on the top of the geotextile for fixation.

3. The construction method of the intelligent spraying and curing system for cast-in-place concrete anti-collision wall according to claim 1 is characterized in that: In step one, based on the size of the crash barrier and on-site construction conditions, modeling software is used for simulation analysis to determine the overall layout of the intelligent spray maintenance system and the installation dimensions of each component. At the same time, the laying position of the channel steel track is determined, and it is laid along the edge of the bridge on the inner side of the crash barrier. The track spacing is set according to the size of the running wheels and the system stability requirements.

4. The construction method of the intelligent spraying and curing system for cast-in-place concrete anti-collision wall according to claim 1, characterized in that: In step three, the water level sensor monitors the water level changes in the water tank in real time. When the water level is lower than the set water adding threshold, the signal is sent to the travel controller. The travel controller drives the travel motor to move the intelligent sprinkler maintenance system along the channel steel track to the designated water adding position.

5. The construction method of the intelligent spraying and curing system for cast-in-place concrete anti-collision wall according to claim 1, characterized in that: In step three, when the intelligent sprinkler maintenance system starts to move, the walking controller sends a walking signal to the cable reel controller. The cable reel controller senses the tension changes of the cable through the tension sensor according to the walking direction and speed of the system, and automatically adjusts the retraction and release speed to ensure that the cable is always in a suitable tension state.

6. The construction method of the intelligent spraying and curing system for cast-in-place concrete anti-collision wall according to claim 1, characterized in that: In step three, the camera captures the surface condition of the crash barrier in real time and transmits the captured image to the control system. The control system uses an image analysis algorithm to analyze the difference between the color depth of the crash barrier concrete and the preset standard color depth, and uses a flow controller to adjust the flow of the flow control pump according to the degree of difference, thereby achieving precise control of the spray water volume.

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