Method for conveying concrete for pouring ultra-deep diaphragm wall

Abstract

The invention discloses a method for conveying concrete for pouring an ultra-deep diaphragm wall, which comprises the following steps of: shooting a video of concrete flowing out of a material collecting bin to obtain the concrete meeting the requirements of preset slump and expansion degree for pouring the ultra-deep diaphragm wall; the concrete meeting the preset slump and expansion degree requirements is conveyed to a material distribution bin, and the concrete in the material distribution bin is stirred; and the stirred concrete is conveyed into the multiple to-be-poured groove holes at the same time through the multiple flow dividing conveying belts, so that the multiple groove holes are synchronously poured to form the diaphragm wall. According to the method, potential safety hazards are avoided in the concrete conveying process, the concrete is not adhered, the pouring volume of the concrete in each slotted hole can be automatically metered, the multiple slotted holes can be poured at the same time, and the construction efficiency is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of water conservancy engineering technology, and in particular to a method for conveying concrete for pouring a 200mm deep ultra-deep anti-seepage wall. Background Technology

[0002] During the construction and pouring of cutoff walls, the concrete transportation process, especially for concrete used in the pouring of 200mm deep ultra-deep cutoff walls, is a crucial step. The existing concrete pouring and transportation processes suffer from the following problems:

[0003] I. Current methods of concrete pouring and transportation often involve reversing concrete mixer trucks onto a walkway to pour concrete into a relatively high aggregate bin. This method poses significant safety hazards. For example, due to the relatively steep slope of the walkway, the concrete mixer truck is at risk of slipping. Furthermore, the width of the walkway is limited by the available space, requiring a high level of driving skill from the driver. Improper operation could easily lead to accidents such as the mixer truck overturning, causing irreparable damage to the project.

[0004] In addition, the existing combination of walkways and aggregate bins for concrete pouring of the anti-seepage wall can only meet the pouring of the same trench, and cannot meet the simultaneous pouring of multiple trench sections or trenches over long distances. If multiple trench sections are poured at the same time, multiple walkways need to be arranged, and concrete mixer trucks will also travel on multiple routes in the work area, which will affect the order of the work area and greatly increase the safety hazards in the work area.

[0005] Second, for the pouring of 200m-class ultra-deep seepage barriers, high-strength concrete of grade C45 or even C55 is used. The water-cement ratio of this type of concrete is much smaller than that of conventional concrete, so it is more viscous and easy to produce an adhesion effect. In addition, the concrete pouring time will last for about 50 hours, which will also increase the viscosity of the concrete. After the concrete adheres to the aggregate bin and solidifies, it is difficult to clean, which affects the efficiency of concrete pouring. Furthermore, the long pouring time can easily cause the operators to become complacent, increasing the safety risks.

[0006] Third, current concrete pouring methods often rely on manual control of the material discharge rate, which cannot guarantee uniform and continuous pouring. Furthermore, existing methods cannot determine whether parameters such as slump and spread of the concrete discharged from the concrete mixer truck meet construction requirements. The current concrete pouring process also cannot accurately determine the actual volume of concrete poured, relying solely on the amount delivered to the concrete mixer truck from the batching plant. However, the concrete delivery from the mixer truck is often insufficient, so the volume of concrete obtained from the batching plant is usually greater than the actual volume poured. This negatively impacts the assessment of pouring speed and trench quality during the concrete pouring process. Summary of the Invention

[0007] The purpose of this invention is to solve the above-mentioned problems and provide a method for conveying concrete for ultra-deep seepage-proof wall construction. There are no safety hazards during the concrete conveying process, the concrete does not adhere, multiple slots can be poured simultaneously, and the volume of concrete poured in each slot can be automatically measured, which greatly improves construction efficiency.

[0008] To achieve the above-mentioned objectives of the present invention, the present invention provides a method for conveying concrete for pouring ultra-deep seepage-proof walls, comprising:

[0009] By filming the concrete flowing out of the aggregate bin, we can obtain concrete that meets the preset slump and spread requirements for pouring ultra-deep cutoff walls.

[0010] Concrete that meets the preset slump and spread requirements is transported to the distribution bins, and the concrete in the distribution bins is mixed.

[0011] Multiple conveyor belts are used to simultaneously transport the mixed concrete to multiple pouring trenches, so that multiple trenches can be poured at the same time to form a seepage barrier.

[0012] Preferably, the concrete that meets the preset slump and spread requirements for ultra-deep cutoff wall pouring is obtained by filming the concrete flowing out of the aggregate bin.

[0013] Videos of concrete flowing out of the aggregate bins are captured, and the acquired concrete videos are processed to obtain the current slump and spread of the concrete.

[0014] The slump and spread of the current concrete are compared with the preset slump and spread of concrete that meet the requirements for pouring ultra-deep cutoff walls, and the comparison results are obtained.

[0015] Based on the comparison results, determine whether the slump and spread of the current concrete meet the preset requirements for concrete slump and spread.

[0016] Preferably, the slump and spread of the current concrete are obtained by processing the acquired concrete video, including:

[0017] The acquired concrete video is analyzed and processed to obtain the current collapse thickness image after the concrete collapses under its own weight and the current diffusion surface diameter image formed after the collapse.

[0018] The slump of the current concrete is obtained by searching the current concrete slump thickness image and the images of different slump thicknesses corresponding to different slumps in the preset concrete slump database.

[0019] The current diffusion surface diameter image of the concrete is obtained by searching for images of different diffusion surface diameters corresponding to different diffusion degrees in the preset concrete diffusion degree database.

[0020] Preferably, the concrete in the distribution bin is mixed by continuous mixing using a mixing plate extending inside the distribution bin.

[0021] Preferably, during the process of conveying concrete via the diversion conveyor belt, the concrete conveyed on the diversion conveyor belt is weighed and measured to determine the volume of concrete poured into the corresponding slot via the diversion conveyor belt.

[0022] Preferably, the concrete conveyed on the diversion conveyor belt is weighed and measured to determine the volume of concrete poured into the corresponding slot via the diversion conveyor belt, including:

[0023] The weight of the concrete passing above it is detected by a weighing sensor, and the detected weight information is transmitted to the processing module.

[0024] The current operating speed of the diversion conveyor belt is detected by a speed sensor, and the detected speed information is transmitted to the processing module.

[0025] The processing module obtains the weight of concrete passing through the diversion conveyor belt per unit time based on the received weight and speed information, and performs cumulative calculations to determine the volume of concrete poured into the corresponding slot via the diversion conveyor belt.

[0026] Preferably, weighing and measuring the concrete conveyed on the diversion conveyor belt to determine the volume of concrete poured into the corresponding slot via the diversion conveyor belt further includes:

[0027] After determining the volume of concrete poured into the corresponding slot via the diversion conveyor belt, adjust the running speed of the diversion conveyor belt according to the current volume of concrete being poured.

[0028] Preferably, adjusting the operating speed of the corresponding diversion conveyor belt according to the current volume of concrete being poured includes:

[0029] The current volume of concrete poured is compared with the preset volume of concrete poured to determine whether the current volume of concrete poured meets the preset requirements.

[0030] If the current volume of concrete poured does not meet the preset requirements, adjust the running speed of the corresponding diversion conveyor belt.

[0031] Preferably, before conveying the mixed concrete to the pouring trench via the diversion conveyor belt, the height of the diversion conveyor belt needs to be adjusted according to the relative position of the pouring guide pipe and the distribution bin.

[0032] Preferably, before conveying the mixed concrete to the pouring trench via the diversion conveyor belt, the length of the diversion conveyor belt needs to be adjusted according to the relative position of the pouring guide pipe and the distribution bin.

[0033] Preferably, the method of simultaneously conveying the mixed concrete to multiple pouring slots via multiple diversion conveyor belts includes:

[0034] Based on the number and location of the slots to be poured with concrete at the same time, open multiple sliding doors on the material distribution bin that correspond to each slot at the same time.

[0035] Under the continuous rotation of the mixing plate in the distribution bin, the concrete in the distribution bin falls from each sliding door onto the distribution conveyor belt corresponding to each slot.

[0036] The falling concrete is transported to the pouring pipe at the corresponding pouring slot through the various branch conveyor belts.

[0037] Preferably, the surface of the component that comes into contact with concrete is sprayed with an anti-stick coating to prevent concrete from adhering.

[0038] Compared with the prior art, the method for concrete delivery for ultra-deep seepage barrier wall construction of the present invention has the following advantages:

[0039] 1. The present invention provides a method for conveying concrete for ultra-deep seepage-proof wall construction. There are no safety hazards during the concrete conveying process, the concrete does not adhere, the concrete volume of each slot can be automatically measured, and multiple slots can be poured simultaneously, which greatly improves construction efficiency.

[0040] 2. This invention, by capturing video of concrete flowing from the aggregate silo, can obtain concrete that meets the preset slump and spread requirements for ultra-deep anti-seepage wall pouring, ensuring the quality of the trench. Concrete is transported via a conveyor belt, solving the safety hazards of using concrete mixer trucks to pour concrete onto walkways in existing technologies. Furthermore, concrete can be simultaneously transported to multiple trenches, making concrete transport safer and faster, preventing material segregation, and enabling simultaneous pouring of multiple trenches, greatly improving construction efficiency and ensuring the quality of the poured concrete. Real-time weight measurement of the concrete during transport ensures the volume of concrete poured into each trench, guaranteeing construction quality. An anti-stick coating is applied to the surfaces of all components in contact with the concrete, effectively preventing concrete adhesion, facilitating cleaning, and ensuring the volume of concrete poured.

[0041] The present invention will now be described in detail with reference to the accompanying drawings. Attached Figure Description

[0042] Figure 1 This is a process diagram of pouring an ultra-deep seepage barrier using the method of this invention;

[0043] Figure 2 This is a structural schematic diagram of the concrete conveying equipment for ultra-deep seepage-proof wall pouring of the present invention;

[0044] Figure 3 This is a schematic diagram of the material distribution bin of the present invention;

[0045] Figure 4 This is a partial structural diagram of the material distribution bin of the present invention;

[0046] Figure 5 This is a schematic diagram of the sliding door drive mechanism of the present invention;

[0047] Figure 6 This is a first-view structural schematic diagram of a portion of the frame of the present invention;

[0048] Figure 7 This is a second-view structural schematic diagram of a part of the frame of the present invention;

[0049] Figure 8 This is a schematic diagram of the structure of the material collection bin of the present invention;

[0050] Figure 9 This is a schematic diagram of the camera component of the present invention;

[0051] Figure 10 This is a schematic diagram of a weighing device;

[0052] Figure 11 This is a schematic diagram of the conveyor belt control principle;

[0053] Figure 12 This is a flowchart of the method of the present invention. Detailed Implementation

[0054] To address the safety hazards associated with using walkways for concrete conveying in existing ultra-deep cutoff wall (grooves exceeding 200 meters in depth) construction, to resolve the risk of segregation during concrete transport, and to address issues such as simultaneous concrete pouring across multiple sections with unified material delivery, uncontrollable pouring speed, and inaccurate concrete quantity measurement, this invention provides a method for concrete transport in ultra-deep cutoff wall construction. Figure 1 , Figure 12 As shown, the method of the present invention includes:

[0055] By filming the concrete flowing out of the aggregate bin, we can obtain concrete that meets the preset slump and spread requirements for pouring ultra-deep cutoff walls.

[0056] Concrete that meets the preset slump and spread requirements is transported to the distribution bins, and the concrete in the distribution bins is mixed.

[0057] Multiple conveyor belts are used to simultaneously transport the mixed concrete to multiple pouring trenches, so that multiple trenches can be poured at the same time to form a seepage barrier.

[0058] In this invention, the following is employed: Figures 1-11 The equipment shown conveys concrete and includes: an aggregate bin 1 for holding concrete poured from a concrete mixer truck; a camera assembly for capturing video of the concrete flowing out of the aggregate bin to obtain concrete that meets preset slump and spread requirements; a distribution bin 4 for receiving the concrete flowing out of the aggregate bin and mixing it; a fixed conveying device 3, using a belt conveyor, for transporting the concrete from the aggregate bin to the distribution bin; and multiple diversion conveying devices 6, also using belt conveyors, for simultaneously conveying the concrete flowing out of the distribution bin to multiple pouring slots to simultaneously pour walls into multiple slots.

[0059] Specifically, the aggregate silo of this invention has a hollow, frustoconical structure that is wider at the top and narrower at the bottom. The top is the inlet, and the bottom is the outlet, with the outlet aligned with the loading end of the fixed conveying device. In the design, a support frame is installed below the aggregate silo to support it above the loading end of the fixed conveying device. Concrete for pouring ultra-deep seepage-proof walls, loaded in a concrete mixer truck, is poured into the aggregate silo from above and flows out from the outlet.

[0060] In order to determine whether the concrete flowing out of the aggregate bin meets the preset slump and spread requirements, and in order to determine whether it needs to be transported to the distribution bin or even the slot, this invention uses a camera component to capture video of the concrete flowing out of the aggregate bin to obtain concrete that meets the preset slump and spread requirements.

[0061] like Figure 9 As shown, the camera assembly of the present invention may include: a shooting module for shooting video of concrete flowing out of the aggregate bin, which employs a camera 2 capable of clearly capturing the instantaneous state of concrete flowing out of the aggregate bin, mounted on a crossbeam 1a of a support frame below the aggregate bin, the crossbeam being a beam whose extension direction is perpendicular to the running direction of the fixed conveyor belt; during installation, the camera can be flexibly adjusted in position and angle as needed to adapt to shooting requirements via a camera bracket, or it can be fixed in one position; a video processing module for processing the concrete video captured by the shooting module to obtain the current concrete slump and spread; and a determination module for comparing the current concrete slump and spread with the preset slump and spread of concrete that meet the requirements for pouring ultra-deep anti-seepage walls, and determining whether the current concrete slump and spread meet the preset concrete slump and spread requirements.

[0062] In order to obtain the current concrete slump and spread, the video processing module of the present invention includes: a thickness processing module for analyzing and processing the concrete video captured by the shooting module to obtain a concrete thickness image and thickness information corresponding to the current concrete slump; and a diameter processing module for processing the concrete video captured by the shooting module to obtain a concrete diffusion surface diameter image and diameter information corresponding to the current concrete spread.

[0063] After the camera captures video of concrete flowing from the aggregate bin and collapsing onto the fixed conveyor belt due to its own weight, the video is transmitted to the thickness processing module and the diameter processing module. These two modules perform image processing on the received video images, such as grayscale conversion, noise reduction, and filtering, to identify the concrete areas in the video and separate them from the background. The thickness processing module acquires an image of the concrete thickness after it has flowed from the aggregate bin and fallen onto the fixed conveyor belt, after a preset collapse time (determined based on concrete composition and experience). This concrete thickness image corresponds to the current slump of the concrete. The diameter processing module acquires an image of the diameter of the diffusion surface formed after the concrete collapses, which corresponds to the current expansion of the concrete.

[0064] To determine whether the slump and spread of the concrete flowing from the aggregate bin meet the preset requirements, the determination module of this invention includes a thickness determination module and a diameter determination module. The thickness determination module searches a concrete thickness image representing the current slump obtained by the thickness processing module against multiple preset concrete thickness images representing different slumps in a thickness database. It finds the image with the closest thickness for concrete of the same composition and compares the current concrete thickness image with the thickness in the found preset image. If the difference after comparison is within a preset range, the current slump of the concrete is determined to meet the preset slump requirements; otherwise, the difference is determined to not meet the preset slump requirements. The diameter determination module can search the concrete diffusion surface diameter image obtained by the diameter processing module, which represents the current spread of the concrete, with multiple pre-set concrete diffusion surface diameter images in the diameter database that represent different spreads of the concrete. It finds the image with the closest diffusion surface diameter for concrete of the same composition, and compares the current concrete diffusion surface diameter image with the diffusion surface diameter in the found pre-set concrete diffusion surface diameter image. If the difference after the comparison is within a preset range, it is determined that the current spread of the concrete meets the preset spread requirement. If the difference after the comparison is not within the preset range, it is determined that the current spread of the concrete does not meet the preset spread requirement.

[0065] The thickness database contains pre-set correspondences between images of concrete with different components and the thickness of each concrete after a preset time of collapse due to its own weight. The diameter database contains pre-set correspondences between images of the diffusion surface diameter formed by the diffusion of various concrete components after a preset time of collapse due to its own weight. The correspondences between concrete with different components and the thickness images, as well as between concrete with different components and the diffusion surface diameter images, were obtained through a large amount of experimental data and practical engineering experience before formal construction.

[0066] After determining whether the concrete falling onto the fixed conveyor belt meets the preset slump and spread requirements, the concrete in and out of the aggregate bin is processed according to the comparison results: concrete that meets the preset slump and spread requirements continues to the next conveying and pouring operation; concrete that does not meet the preset requirements is stopped from being discharged from the tanker truck into the aggregate bin, and the concrete in the tanker truck, the aggregate bin, and the concrete flowing onto the fixed conveyor belt is pulled away for disposal.

[0067] This invention utilizes an AI-powered camera system installed outside the aggregate silo to recognize the slump and spread of concrete. By analyzing the slump and spread of the concrete as it is released from the truck onto the fixed conveyor belt below the silo, the actual (current) slump and spread of the concrete are obtained. This ensures that the concrete used for pouring meets the preset slump and spread requirements, effectively guiding concrete pouring and reducing the risks of pipe blockage and other problems caused by concrete performance issues. This is beneficial for improving the quality of 200m-class ultra-deep cutoff walls. Furthermore, the analysis results can provide feedback on the concrete production process. For example, if the current slump or spread of the concrete is detected to be unsatisfactory, the control system can adjust parameters such as the concrete mix proportions, water usage, or mixing time to ensure that subsequent concrete production meets the requirements.

[0068] The slump and spread analysis results of this invention can be output in an intuitive way, such as overlaying the current slump and spread values ​​of the concrete onto the user's video screen, along with prompts indicating whether the preset slump and spread requirements are met. For example, if the current slump or spread of the concrete does not meet the requirements, an alarm signal is issued to notify the operator for manual intervention and inspection, preventing substandard concrete from entering the ultra-deep anti-seepage wall pouring process. Furthermore, the results data can be stored in a database for subsequent querying and statistical analysis. Additionally, it can communicate with a remote access system, allowing operators to view the system's operating status and analysis results from their office or other locations via a browser or mobile application, enabling remote monitoring and management.

[0069] When the concrete flowing from the aggregate bin meets the preset slump and spread requirements, it is continuously conveyed to the distribution bin by a fixed conveyor. This fixed conveyor is a belt conveyor, consisting of a fixed conveyor belt and a motor 32 for driving the belt in a circular motion. The structure of the belt conveyor is similar to existing technology, and its structure will not be described in detail here. During assembly, the camera is positioned between the outlet of the aggregate bin and the upper surface of the fixed conveyor belt of the fixed conveyor, preferably close to the upper surface of the fixed conveyor belt. In the design, the fixed conveyor is lower at the front and higher at the back; that is, the feeding end on the aggregate bin side is lower than the discharging end on the distribution bin side. Correspondingly, the support column 31 on the feeding end side is lower than the support column on the discharging end side, so that the discharge end is directly above the distribution bin. The fixed conveyor can refer to the structure of existing belt conveyors.

[0070] Concrete meeting preset slump and spread requirements is conveyed by a fixed conveyor belt to a distribution silo, which can mix and simultaneously output the conveyed concrete. For example... Figures 2-5 As shown, the material distribution bin 4 of the present invention includes: a hollow frustoconical bin body; a plurality of discharge ports 41 spaced apart on the side wall of the bin body; sliding doors 42 slidably disposed at each discharge port of the bin body; a mixing mechanism 5 whose mixing plate 51 extends from the bottom of the bin body into the bin body to mix the concrete in the bin body; and a plurality of sliding door driving mechanisms (not shown in the figure) for driving the plurality of sliding doors to slide relative to the bin body to expose or close the discharge ports.

[0071] Specifically, the lower part of the silo body of the present invention is supported by multiple silo columns 44, and a stirring motor 52 of the stirring mechanism is set at the bottom of the silo body. The output shaft of the stirring motor passes through the center of the bottom plate of the silo body from bottom to top, and multiple stirring plates are installed at equal angles on the part located inside the silo body. When the output shaft rotates, it drives the stirring plates to rotate inside the silo body to continuously stir the concrete inside the silo body.

[0072] To enable simultaneous pouring of multiple slots, multiple discharge ports are spaced apart on the sidewalls of the silo. The lower edge of each discharge port is flush with the upper surface of the silo's bottom plate. Near each discharge port is a sliding door slidably connected to the silo. Driven by a sliding door drive mechanism, the sliding door moves circumferentially relative to the silo's sidewall to expose or close the discharge port as needed. The sliding door drive mechanism can be electric, hydraulic, or pneumatic, and is mounted on the outer wall or bottom plate of the silo. For example, two guide rails 43 (which can be LM rolling guide rails) are respectively installed on the sidewall above the discharge port and on the bottom plate below the discharge port. The upper and lower parts of the sliding door are slidably connected to the two guide rails via sliders. The connection between the sliding door drive mechanism and the sliding door is readily apparent to those skilled in the art and will not be described in detail here. During the design process, each sliding door can operate independently. The sliding door and the discharge port must fit tightly together, and the sliding door must be larger than the discharge port to prevent concrete from flowing out of the gap between them. The larger the exposed outlet after the sliding door moves relative to the outlet, the greater the discharge speed and the greater the quantity of concrete discharged from the material distribution bin. In application, the distance the sliding door moves relative to the outlet can be determined according to the actual needs of the slot pouring.

[0073] In order to simultaneously deliver the concrete flowing from the distribution silo to different slots, this invention provides a diversion and conveying device 6 at the corresponding position of each sliding door (e.g., ...). Figure 2 Three diversion conveyor devices are shown. Each diversion conveyor device has the same structure, such as... Figure 2 , Figure 6 , Figure 7 As shown, each diversion conveyor also employs a belt conveyor, including: a diversion conveyor belt 63; a frame supporting the diversion conveyor belt; multiple support legs located below the frame to support the frame, including fixed support legs with constant height and telescopic support legs with adjustable height; and a motor for driving the diversion conveyor belt to circulate in a ring on the frame. The diversion conveyor is lower at the front and higher at the back, meaning the feeding end on the side of the distribution bin is lower than the discharging end on the side that approaches the slot.

[0074] The frame of the diversion and conveying device includes a fixed frame 61 and a movable frame 62 detachably connected to the fixed frame. Fixed support legs are installed below the fixed frame, and telescopic support legs 7 are installed below the movable frame. The height of the movable frame can be adjusted by the telescopic support legs. The telescopic support legs can be driven to extend and retract by a hydraulic cylinder. For example, the telescopic support legs include an upper support leg 73 fixedly installed on the movable frame and a lower support leg 71 located below the upper support leg. The upper support leg is connected to the telescopic rod of the hydraulic cylinder 72, and the cylinder body of the hydraulic cylinder is fixedly connected to the lower support leg.

[0075] Furthermore, to ensure that the diversion conveyor can deliver concrete to the pouring guide pipe at the corresponding slot according to the actual situation, that is, the discharge end of the diversion conveyor belt is located directly above the slot, the movable frame of this invention also adopts a telescopic frame that can adjust the length of the diversion conveyor belt within a small range. In the design, the movable frame includes a first movable frame and a second movable frame that can extend and retract relative to the first movable frame. The first movable frame is fixedly connected to the cylinder body of the hydraulic cylinder 8, and the second movable frame is fixedly connected to the telescopic rod of the hydraulic cylinder. The second movable frame and the fixed frame are fixedly connected together by bolts, etc. The second movable frame can rotate relative to the fixed frame at a certain angle and is locked after the relative angle between the two is determined.

[0076] In order to ensure that the supporting rollers 92 of the supporting assembly 9 installed between the upper and lower frames of the movable frame can provide good support for the diversion conveyor belt before and after the length of the diversion conveyor belt changes, the present invention also provides multiple springs 91 between the upper and lower frames, so that the supporting rollers can adapt to the diversion conveyor belt through the automatic extension and contraction of the springs.

[0077] In addition, the diversion and conveying device of the present invention may also have a belt tension adjustment mechanism, which can adopt existing technology mechanisms, and its structure will not be described in detail here.

[0078] The frame of the diversion conveyor device of this invention can be adjusted in height and length. The height of the diversion conveyor belt is adjusted by the extension and retraction of the hydraulic cylinder controlling the height, and the length of the diversion conveyor belt is adjusted by the extension and retraction of the hydraulic cylinder controlling the length. By adding a speed controller to the motor that powers the diversion conveyor belt, the conveying speed of the diversion conveyor belt can be automatically adjusted. This allows the equipment of this invention to adapt to various site conditions and automatically adjust its height and length according to actual conditions, thereby meeting the needs of various types of anti-seepage wall pouring and greatly reducing the labor costs in the process of pouring 200m-class ultra-deep anti-seepage walls.

[0079] In order to accurately determine the actual volume of concrete poured into the corresponding slot by each diversion conveyor belt, the present invention also includes: a weighing device for weighing and measuring the concrete conveyed on the diversion conveyor belt during the concrete conveying process, so as to determine the volume of concrete poured into the corresponding slot by the diversion conveyor belt.

[0080] Weighing devices can be adopted as follows: Figure 10The structure shown includes: a load cell for detecting the weight of concrete passing over it, which can be installed at a relatively stable point on a fixed or movable frame (not shown in the figure), below the diversion conveyor belt and above the idler rollers, and can be in contact with the diversion conveyor belt; a speed sensor for detecting the current operating speed of the diversion conveyor belt, which can obtain the conveyor belt operating speed by detecting the motor speed or directly detecting the conveyor belt speed; and a weight processing module electrically connected to the load cell and the speed sensor respectively. The weight processing module receives the weight information detected by the load cell and the speed information detected by the speed sensor, processes the relevant information, obtains the weight of concrete passing on the diversion conveyor belt per unit time, and performs cumulative calculation and conversion of the concrete weight to determine the volume of concrete poured into the corresponding slot via the diversion conveyor belt.

[0081] In addition, such as Figure 11 As shown, the weighing device may further include: a concrete volume comparison module that compares the currently poured concrete volume with a preset concrete volume to determine whether the currently poured concrete volume meets the preset requirements; and a conveyor belt control module that adjusts the running speed of the corresponding diversion conveyor belt when the currently poured concrete volume does not meet the preset requirements. Furthermore, it may also include a sliding door sliding control module for adjusting the moving distance of the sliding door relative to the discharge port, which controls the sliding door drive mechanism to perform corresponding actions to drive the sliding door to achieve the required moving stroke.

[0082] This invention incorporates a weighing sensor installed beneath the diversion conveyor belt. When concrete is transported on the conveyor belt and passes above the weighing sensor, the conveyor belt and concrete exert downward pressure on the sensor. The weighing sensor converts these pressure signals into electrical signals, which are then analyzed and calculated by a weight processing module to determine the weight of the concrete. Based on this weight, the volume of concrete is calculated. The volume of concrete can then be used to determine the pouring speed, thereby adjusting the pouring rate. In other words, by detecting the volume of concrete transported by the diversion conveyor belt and its operating speed, the actual volume of concrete poured by each diversion conveyor belt at the corresponding slot can be accurately determined. Combined with a sliding gate, the volume and speed of concrete poured by each diversion conveyor belt at the corresponding slot can be effectively controlled.

[0083] To ensure the continuity of the pouring process during the more than 50-hour pouring time of a 200m-class ultra-deep cutoff wall, this invention sprays an anti-stick coating on the surfaces of components in contact with concrete to prevent concrete adhesion. Specifically, this invention uniformly and smoothly sprays a addition-type silicone-based anti-stick coating onto the surfaces of all components that come into direct contact with concrete, such as aggregate bins, fixed conveyor belts, distribution conveyor belts, distribution bins, and mixing plates, to prevent concrete from adhering to these components. Furthermore, the anti-stick coating needs to be replenished periodically. After each concrete pour, the condition of the anti-stick coating sprayed on the surfaces of all components that come into contact with concrete is checked. If the anti-stick coating is severely damaged, it is cleaned and re-sprayed; if the damage is minor, it is directly replenished until the surface is smooth and even.

[0084] The following describes the method for conveying concrete for pouring ultra-deep cutoff walls with a depth of up to 200 meters using the aforementioned equipment.

[0085] S01. Preparatory work before pouring the ultra-deep seepage barrier wall

[0086] Check that all connections on the equipment are secure; check that all automatically adjustable hydraulic devices are functioning properly; check that all motors and sensors are operating normally; check the placement of each device, ensuring the aggregate bin is directly below the front end of the fixed conveyor belt to ensure all concrete conveyed by the fixed conveyor belt enters the aggregate bin; ensure all sliding doors of the electrically controlled distribution bins are closed; and ensure the loading ends of each distribution conveyor belt are below the discharge ports of each distribution bin to ensure all concrete from each discharge port enters its respective distribution conveyor belt. Adjust the angle, height, and length of each distribution conveyor belt according to the conditions of each slot, aligning the unloading ends of each distribution conveyor belt with the pouring guide pipes in each slot to ensure all conveyed concrete enters the pouring guide pipes. The length of the distribution conveyor belts is adjusted by extending and retracting the hydraulic cylinders that control the length of the movable frame, and the tension adjustment mechanism ensures the distribution conveyor belts are always taut.

[0087] S02. By filming the concrete flowing out of the aggregate bin, obtain concrete that meets the preset slump and spread requirements for pouring ultra-deep anti-seepage walls;

[0088] Concrete (concrete with pre-set slump and spread) is delivered to the aggregate bin using a concrete mixer truck. Under its own weight, the concrete falls through the aggregate bin to the feeding end of the fixed conveyor belt below.

[0089] During the process of concrete falling from the aggregate bin onto the fixed conveyor belt, video footage of the concrete flowing out of the aggregate bin is captured to obtain concrete that meets the preset slump and spread requirements for ultra-deep cutoff wall pouring, including:

[0090] S021. Capture a video of the concrete flowing out of the aggregate bin, and process the captured concrete video to obtain the current concrete slump and spread.

[0091] The AI ​​camera captures videos of concrete flowing from the aggregate bin and collapsing onto a fixed conveyor belt due to its own weight. The acquired concrete videos are analyzed and processed to obtain images of the current slump thickness and the current diffusion surface diameter formed after the concrete collapses under its own weight.

[0092] In other words, the received video images are processed separately, such as performing preprocessing operations like grayscale conversion, noise reduction, and filtering on the acquired video images, identifying the concrete area in the video, separating the concrete area from the background, and obtaining the concrete thickness image corresponding to the current slump of the concrete after it flows out of the aggregate bin and falls onto the fixed conveyor belt at a preset collapse time (the preset time is determined based on the concrete composition and experience), as well as the diffusion surface diameter image corresponding to the current expansion degree of the concrete after it collapses and diffuses.

[0093] S022. Compare the current slump and spread of the concrete with the preset slump and spread of the concrete that meets the requirements for pouring ultra-deep anti-seepage walls, and determine whether the current slump and spread of the concrete meet the preset requirements based on the comparison results.

[0094] After obtaining concrete thickness images and diffusion surface diameter images that respectively characterize the current slump and spread of concrete, the current slump thickness image is compared with images of different slump thicknesses corresponding to different slumps in the preset concrete slump database to determine the current slump of the concrete; the current diffusion surface diameter image is compared with images of different diffusion surface diameters corresponding to different spreads in the preset concrete spread database to determine the current spread of the concrete.

[0095] Specifically, after obtaining a concrete thickness image that can characterize the current slump of the concrete, this image is compared with multiple pre-set concrete thickness images in the thickness database used to represent different slumps of concrete. The image with the closest thickness among the displayed images of concrete with the same composition is found, and the current concrete thickness image is compared with the thickness in the found pre-set concrete thickness image. If the difference after the thickness comparison is within a preset range, it is determined that the current slump of the concrete meets the preset slump requirement; if the difference after the thickness comparison is not within the preset range, it is determined that the current slump of the concrete does not meet the preset slump requirement.

[0096] After obtaining the concrete diffusion surface diameter image that can characterize the current diffusion degree of concrete, this image is searched against multiple pre-set concrete diffusion surface diameter images in the diameter database that represent different diffusion degrees of concrete. The image with the closest diffusion surface diameter for concrete of the same composition is found, and the current concrete diffusion surface diameter image is compared with the diffusion surface diameter in the searched pre-set concrete diffusion surface diameter image. If the difference after the comparison of diffusion surface diameters is within a preset range, it is determined that the current diffusion degree of concrete meets the preset diffusion degree requirement. If the difference after the comparison of diffusion surface diameters is not within the preset range, it is determined that the current diffusion degree of concrete does not meet the preset diffusion degree requirement.

[0097] The thickness database contains pre-set correspondences between images of concrete with different components and the thickness of each concrete after a preset time of collapse due to its own weight. The diameter database contains pre-set correspondences between images of the diffusion surface diameter formed by the diffusion of various concrete components after a preset time of collapse due to its own weight. The correspondences between concrete with different components and the thickness images, as well as between concrete with different components and the diffusion surface diameter images, were obtained through a large amount of experimental data and practical engineering experience before formal construction.

[0098] After determining whether the concrete falling onto the fixed conveyor belt meets the preset slump and spread requirements, the concrete in and out of the aggregate bin is processed according to the comparison results: concrete that meets both the preset slump and spread requirements continues to the next conveying and pouring operation; concrete that does not meet either preset requirement is stopped from being discharged from the tanker truck into the aggregate bin, and the concrete in the tanker truck, the aggregate bin, and the concrete flowing onto the fixed conveyor belt is pulled away for processing.

[0099] The slump and spread analysis results of this invention can be output in an intuitive way, such as overlaying the current slump and spread values ​​of the concrete onto the user's video screen, along with prompts indicating whether the preset slump and spread requirements are met. For example, if the current slump or spread of the concrete does not meet the requirements, an alarm signal is issued to notify the operator for manual intervention and inspection, preventing substandard concrete from entering the ultra-deep anti-seepage wall pouring process. Furthermore, the results data can be stored in a database for subsequent querying and statistical analysis. Additionally, it can communicate with a remote access system, allowing operators to view the system's operating status and analysis results from their office or other locations via a browser or mobile application, enabling remote monitoring and management.

[0100] S03. Concrete that meets the preset slump and spread requirements is transported to the distribution bin, and the concrete in the distribution bin is mixed.

[0101] When the concrete flowing out of the aggregate bin meets the preset slump and spread requirements, it will be continuously transported to the distribution bin. The concrete in the distribution bin will be continuously mixed by the mixing plate extending into the distribution bin to prevent segregation.

[0102] S04. The mixed concrete is simultaneously transported to multiple pouring trenches via multiple diversion conveyor belts so that multiple trenches can be poured at the same time to form a seepage barrier.

[0103] During the mixing process of the concrete in the distribution bin by the mixing plate, according to the number and position of the slots to be poured at the same time, multiple sliding doors on the distribution bin corresponding to each slot are controlled to move simultaneously to open the discharge port. This allows concrete that meets the preset slump and expansion to fall from each sliding door onto the diversion conveyor belt corresponding to each slot under the continuous rotation of the mixing plate in the distribution bin. The falling concrete is then transported to the pouring pipe at the corresponding slot to be poured through the diversion conveyor belt, so as to meet the requirement of pouring multiple slots at the same time and forming a seepage barrier.

[0104] Before the mixed concrete is transported to the pouring trench via the diversion conveyor belt, the length, height, and angle of the diversion conveyor belt need to be adjusted according to the relative positions of the pouring guide pipe and the distribution bin to adapt to the site conditions.

[0105] During the process of transporting concrete to the trench for the pouring of the anti-seepage wall, the concrete on each diversion conveyor belt will be weighed and measured while being transported to determine the volume of concrete poured into the corresponding trench via the diversion conveyor belt, including:

[0106] When concrete is being transported on the conveyor belt and passes over the weighing sensor, the weighing sensor detects the weight of the concrete passing over it and transmits the detected weight information to the processing module.

[0107] The current operating speed of the diversion conveyor belt is detected by a speed sensor, and the detected speed information is transmitted to the processing module.

[0108] The processing module obtains the weight of concrete passing through the diversion conveyor belt per unit time based on the received weight and speed information. It then accumulates the weight of concrete delivered to the corresponding slot by the diversion conveyor belt based on the total delivery time. Finally, it determines the volume of concrete poured into the corresponding slot by the diversion conveyor belt based on the conversion relationship between weight and volume (converted to the existing method).

[0109] After determining the volume of concrete poured into the corresponding slot via the diversion conveyor belt, the running speed of the diversion conveyor belt can be adjusted according to the current volume of concrete poured. This includes: comparing the current volume of concrete poured with the preset volume of concrete poured to determine whether the current volume of concrete poured meets the preset requirements; if the current volume of concrete poured does not meet the preset requirements, then adjusting the running speed of the corresponding diversion conveyor belt.

[0110] In other words, by detecting the volume of concrete conveyed by the diversion conveyor belt and the operating speed of the diversion conveyor belt, the actual volume of concrete poured by each diversion conveyor belt to the corresponding slot can be accurately determined. Combined with the sliding gate, the volume and speed of concrete poured by each diversion conveyor belt to the corresponding slot can be effectively controlled.

[0111] It should be noted that, in order to ensure the continuity of the pouring process during the more than 50-hour pouring time of the 200m-class ultra-deep seepage barrier wall, the present invention sprays an anti-stick coating on the surface of the components in contact with concrete to prevent concrete from adhering. In other words, the present invention uniformly and smoothly sprays an addition-type silicone-based anti-stick coating on the surface of all components that can directly contact concrete, such as aggregate bins, fixed conveyor belts and diversion conveyor belts, distribution bins, and mixing plates, to prevent concrete from adhering to the above-mentioned components.

[0112] In summary, the method of this invention for conveying concrete for ultra-deep seepage-proof walls has the following advantages:

[0113] I. The method of the present invention uses a belt conveyor to transport concrete for pouring, which solves the safety hazards of the existing technology that requires concrete trucks to be unloaded onto the walkway for concrete transportation.

[0114] Second, this invention can re-mix the concrete in the distribution bin, effectively preventing segregation of the concrete transported from the aggregate bin after long-distance transport, as well as the solidification of the concrete during the pouring interval; and the distribution bin has multiple sliding doors with independently adjustable discharge opening sizes. During the process of the mixing plate rotating to mix the concrete in the bin, the concrete distributed in different positions in the distribution bin can also be pushed to each discharge port to achieve the function of diversion and distribution, thereby meeting the needs of simultaneous pouring of multiple slots.

[0115] Third, this invention applies a uniform and smooth addition-type silicone-based anti-stick coating to the surfaces of all components that come into direct contact with concrete, such as aggregate bins, fixed conveyor belts, diversion conveyor belts, distribution bins, and mixing plates. This effectively prevents the highly viscous C45 or even C55 high-strength concrete used for pouring 200m-class ultra-deep cutoff walls from adhering to the components, reducing the amount of concrete slurry adhering, minimizing concrete quantity loss during transportation, and ensuring the continuity of the pouring process during long-term (up to 50 hours) pouring of ultra-deep cutoff walls.

[0116] Fourth, the opening size of the multiple discharge ports on the material distribution silo of this invention can be controlled according to the actual pouring situation, thereby controlling the discharge speed and quantity of each discharge port. The concrete in the material distribution silo can be simultaneously diverted to multiple diversion conveyor belts, the discharge speed is controllable, and uniform pouring can be ensured while maintaining pouring continuity. In addition, each diversion conveyor belt can operate independently, making the pouring process more flexible and allowing for pouring as needed.

[0117] Fifth, it can capture, analyze, locate, and compare the slump and spread of concrete falling onto the fixed conveyor belt, thereby guiding the use of concrete that meets the requirements for slump and spread for pouring, and stopping the discharge of concrete that does not meet the requirements and removing the unqualified concrete for disposal, thus ensuring the pouring quality of the concrete anti-seepage wall.

[0118] VI. The height, length, and angle of the diversion conveyor belt can be adjusted appropriately according to the on-site pouring conditions. The speed of the motor that drives the diversion conveyor belt is adjustable, thereby meeting the pouring requirements of cutoff walls at various distances, heights, and speeds, and reducing the labor costs in the pouring process of 200m-class ultra-deep cutoff walls.

[0119] 7. During the concrete conveying process, the weight of the concrete can be weighed by the diversion conveyor belt, so as to accurately know the actual volume of concrete poured to the corresponding slot of each diversion conveyor belt, and thus effectively control the volume and speed of each diversion conveyor belt.

[0120] 8. This invention realizes the automation and intelligence of concrete delivery during the concrete pouring process of the anti-seepage wall, which greatly saves labor costs, improves the continuity of the pouring process, increases construction efficiency, and ensures the quality of the completed wall.

[0121] Although the present invention has been described in detail above, the present invention is not limited thereto. Those skilled in the art can make modifications based on the principles of the present invention. Therefore, all modifications made in accordance with the principles of the present invention should be understood as falling within the protection scope of the present invention.

Claims

1. A method for conveying concrete for pouring ultra-deep seepage-proof walls, comprising: By filming the concrete flowing out of the aggregate bin, we can obtain concrete that meets the preset slump and spread requirements for pouring. Concrete that meets the preset slump and spread requirements is transported to the distribution bins, and the concrete in the distribution bins is mixed. Multiple conveyor belts are used to simultaneously transport the mixed concrete to multiple pouring trenches, so that multiple trenches can be poured at the same time to form a seepage barrier.

2. The method according to claim 1, wherein obtaining concrete that meets the preset slump and spread requirements for pouring by capturing video of concrete flowing out of the aggregate bin comprises: Videos of concrete flowing out of the aggregate bins are captured, and the acquired concrete videos are processed to obtain the current slump and spread of the concrete. The slump and spread of the current concrete are compared with the preset slump and spread of the concrete that meets the requirements for pouring, and it is determined whether the slump and spread of the current concrete meet the preset requirements for concrete slump and spread.

3. The method according to claim 2, wherein the concrete in the distribution bin is mixed by continuous mixing by a mixing plate extending inside the distribution bin.

4. The method according to any one of claims 1-3, wherein during the process of conveying concrete by the diversion conveyor belt, the concrete conveyed on the diversion conveyor belt is weighed and measured to determine the volume of concrete poured into the corresponding slot via the diversion conveyor belt.

5. The method according to claim 4, wherein weighing and measuring the concrete conveyed on the diversion conveyor belt to determine the volume of concrete poured into the corresponding slot via the diversion conveyor belt includes: The weight of the concrete passing above it is detected by a weighing sensor, and the detected weight information is transmitted to the processing module. The current operating speed of the diversion conveyor belt is detected by a speed sensor, and the detected speed information is transmitted to the processing module. The processing module obtains the weight of concrete passing through the diversion conveyor belt per unit time based on the received weight and speed information, and performs cumulative calculations to determine the volume of concrete poured into the corresponding slot via the diversion conveyor belt.

6. The method according to claim 5, further comprising weighing and measuring the concrete conveyed on the diversion conveyor belt to determine the volume of concrete poured into the corresponding slot via the diversion conveyor belt, including: After determining the volume of concrete poured into the corresponding slot via the diversion conveyor belt, adjust the running speed of the diversion conveyor belt according to the current volume of concrete being poured.

7. The method according to claim 6, wherein adjusting the running speed of the corresponding diversion conveyor belt according to the current volume of concrete being poured includes: The current volume of concrete poured is compared with the preset volume of concrete poured to determine whether the current volume of concrete poured meets the preset requirements. If the current volume of concrete poured does not meet the preset requirements, adjust the running speed of the corresponding diversion conveyor belt.

8. According to the method of claim 1, before conveying the mixed concrete to the pouring slot via the diversion conveyor belt, the height of the diversion conveyor belt needs to be adjusted according to the relative position of the pouring guide pipe and the distribution bin.

9. According to the method of claim 8, before conveying the mixed concrete to the pouring trench via the diversion conveyor belt, the length of the diversion conveyor belt needs to be adjusted according to the relative position of the pouring guide pipe and the distribution bin.

10. The method according to claim 1, wherein simultaneously conveying the mixed concrete to multiple pouring slots via multiple diversion conveyor belts comprises: Based on the number and location of the slots to be poured with concrete at the same time, open multiple sliding doors on the material distribution bin that correspond to each slot at the same time. Under the continuous rotation of the mixing plate in the distribution bin, the concrete in the distribution bin falls from each sliding door onto the distribution conveyor belt corresponding to each slot. The falling concrete is transported to the pouring pipe at the corresponding pouring slot through the various branch conveyor belts.

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