Concrete pouring equipment and pouring method for an inclined retaining wall

Abstract

The present application belongs to the technical field of water conservancy channel construction equipment, and particularly relates to a concrete pouring equipment and pouring method for an upwardly inclined retaining wall, which comprises a pouring trolley moving along the extension direction of the channel, a drainage mechanism, a block stone replacement mechanism, a concrete conveying mechanism and a vibrating mechanism located on the pouring trolley, and the vibrating mechanism comprises a sliding support and a plurality of high-frequency vibrating rods. During vibrating operation, the plurality of high-frequency vibrating rods move synchronously and slide at a constant speed along the sliding support from the bottom to the top of the upwardly inclined formwork. The present application has the beneficial effects that: an upwardly inclined steel formwork is manually erected in advance during construction, the pouring trolley is constructed in sections, and the operations of dewatering, block stone replacement and concrete vibrating and pouring are completed synchronously, so that a plurality of processes are integrated on the integrated pouring trolley, the exposed time of the quicksand foundation pit is shortened, and the automatic dewatering and emergency block stone placement in step two greatly reduce the risk of piping and collapse of the quicksand foundation pit.

Description

Technical Field

[0001] This invention relates to the field of water conservancy channel construction equipment technology, specifically to a concrete pouring equipment and method for an inclined retaining wall. Background Technology

[0002] In rural water conservancy channel renovation projects, there are many construction scenarios in quicksand strata. Inclined concrete retaining walls need to be built on both sides of the channel to constrain the soil body and resist lateral water and soil pressure. However, the soil particles in this type of stratum are fine and the dynamic water pressure is significant. During the excavation process, there is a high risk of piping, slope slippage, or even local collapse.

[0003] In the current construction mode, the steel formwork for the inclined retaining wall is erected and fixed manually in advance in the foundation pit, and then various construction operations are carried out in sequence. However, the various construction tools are independent of each other, and the construction procedures are arranged in sequence. The construction teams are not well connected, which leads to the foundation pit being exposed for a long time, further amplifying the risk of quicksand instability. Summary of the Invention

[0004] The present invention addresses the problems mentioned above by designing a concrete pouring device and method for an inclined retaining wall.

[0005] To achieve the above objectives, the present invention provides a concrete pouring device for an inclined retaining wall, comprising a pouring trolley that moves along the channel extension direction, and a drainage mechanism, a riprap replacement mechanism, a concrete conveying mechanism, and a vibration mechanism located on the pouring trolley. The vibration mechanism includes a sliding support and multiple high-frequency vibrators. During vibration operation, the multiple high-frequency vibrators move synchronously and slide along the sliding support from the bottom to the top of the inclined formwork at a uniform speed to vibrate.

[0006] Furthermore, the dewatering mechanism includes a variable frequency submersible pump and a lightweight manhole pre-installed around the foundation pit; the variable frequency submersible pump can be detachably installed on the pouring trolley, and the variable frequency submersible pump is connected to the lightweight manhole through a flexible pipe; a groundwater level sensor is detachably installed in the lightweight manhole, the groundwater level sensor is electrically connected to a control system, and the control system is also electrically connected to the variable frequency submersible pump.

[0007] Furthermore, the riprap replacement mechanism includes a riprap hopper located on the pouring trolley, a riprap discharge port is provided at the bottom of the riprap hopper, a discharge valve is installed at the riprap discharge port, and a riprap feeding chute extends from the riprap discharge port.

[0008] Furthermore, the discharge valve is electrically connected to the output terminal of the control system.

[0009] Furthermore, the concrete conveying mechanism includes a concrete hopper located on the pouring trolley, with a concrete loading port and a concrete discharge port respectively opened on the side wall of the concrete hopper, and a pressure pump installed at the concrete discharge port, the output end of which is connected to a concrete pipe.

[0010] Furthermore, a mixing mechanism is rotatably installed inside the concrete hopper. The mixing mechanism includes a servo motor, a mixing shaft, and a mixing paddle. The output shaft of the servo motor is coaxially arranged with the mixing shaft and driven by it. The mixing paddle is fixedly connected to the mixing shaft.

[0011] Furthermore, the sliding support includes a frame that can be detachably installed on the pouring trolley. Several T-shaped guide rods arranged in a linear array are arranged inside the frame. The upper ends of multiple high-frequency vibrating rods are suspended on the movable frame through spring damping shock absorbers. The movable frame is slidably connected to the sliding support by a driving hydraulic cylinder.

[0012] Furthermore, guide rails are provided on both sides of the frame, and slider groups matching the guide rails are assembled at both ends of the movable frame. The movable frame slides with the frame through the slider groups, and a limiting roller matching the T-shaped guide rod is rotatably installed at the bottom of the movable frame. The limiting roller rolls in contact with the T-shaped guide rod for limiting.

[0013] This invention also includes a method for pouring concrete using a concrete pouring device for an inclined retaining wall, comprising the following steps: Step 1: Pre-erect the inclined retaining wall formwork: Based on the channel cross-section dimensions, manually erect, adjust and fix the steel formwork for the inclined retaining wall in the foundation pit. The steel formwork is supported by conventional steel pipes. Step 2, Equipment Arrival and Pre-dewatering and Pressure Stabilization of Quicksand Pit: Lightweight manholes are installed around the pit in advance. Groundwater level sensors in the manholes monitor the water level in real time. The variable frequency submersible pump in the dewatering mechanism is started to automatically pump water and continuously lower the groundwater level to 0.5-1.0m below the foundation, reducing dynamic water pressure and preventing quicksand. Step 3: Layered replacement and compaction of base boulders: Clean the surface of the base, removing loose soil, silt, quicksand, etc., and repair the pit walls to ensure that the base is flat and firm. Then, lay the boulders in layers through the boulder feeding chute, with each layer controlled to be 300-500mm thick. Fill the gaps between the boulders with crushed stone or stone chips. Finally, use an excavator to compact the boulders, with each layer compacted at least 3 times. Step 4: After the replacement layer is completed, the bearing capacity of the base is tested by dynamic penetration test. Only after the standard is met can the pouring process begin: Workers insert the socket concrete pipe into the inclined formwork, deliver the concrete evenly, and simultaneously start the vibration mechanism to vibrate at a uniform speed along the inclined surface. The high-frequency vibrator slides and vibrates at a uniform speed from bottom to top along the inclined surface. The material placement speed and the vibration sliding speed are linked and matched to prevent concrete cold joints and void defects. Step 5: Segmented construction. After the 10-20m retaining wall of a single segment is poured, the pouring trolley slides longitudinally along the channel to the next construction segment. The gap between the next construction segment and the previous construction segment is 20mm. Asphalt fir wood boards are used to fill the gap. Steps 2 to 4 are repeated to achieve continuous water flow construction of the channel. Step Six: After the concrete has cured to the required standard, remove the formwork and use a concrete pouring crane to modularly disassemble and transport the concrete to the next construction site.

[0014] Furthermore, in step two, if quicksand is observed, emergency riprap is placed in the riprap chute to stabilize the soil.

[0015] In summary, the present invention has the following advantages and beneficial technical effects: 1. The dewatering mechanism in this equipment can automatically adjust the pumping power in real time according to the groundwater level, continuously and stably controlling the water level at 0.5-1.0m below the foundation, effectively reducing the dynamic water pressure in the strata; at the same time, the riprap feeding chute can quickly deliver stones, and if sand inrush or landslide occurs in the foundation pit, it can immediately be used to stabilize the soil. The entire set of equipment operates in an integrated manner, eliminating the need for multiple machines to cross-enter and disturb the quicksand soil. Combined with the parallel construction logic, it significantly shortens the time the foundation pit is exposed, reducing the probability of safety accidents such as piping and slope collapse from the source.

[0016] 2. In traditional construction, dewatering, riprap replacement, and concrete pouring are carried out by separate equipment in sequence, leading to bottlenecks in the process. This invention integrates four functions: dewatering, riprap replacement, concrete conveying, and vibration. After the formwork is erected in advance, the equipment operates continuously in sections along the canal, significantly shortening the construction cycle for a single section. Furthermore, the frequency of equipment transport and manual labor is significantly reduced, making it suitable for canal renovation projects in scattered villages and towns with multiple locations.

[0017] 3. The concrete hopper has a built-in mixing mechanism, ensuring continuous mixing throughout the pouring process and preventing initial setting and aggregate segregation. The vibration mechanism uses spring-damped shock absorbers suspended below the movable frame to isolate vibration transmission during operation; it is equipped with T-shaped guide rods and double-sided guide rails for limiting, ensuring guiding accuracy; the driving hydraulic cylinder moves the vibrator rod from bottom to top at a uniform speed, eliminating problems such as missed vibration and vibration position deviation during manual vibration, effectively reducing quality defects such as honeycomb, voids, and cold joints in the wall.

[0018] 4. In this invention, the groundwater level is automatically controlled, and the electric control feeding of boulders and the hydraulic automatic vibration are all operated by mechanized electric control. There is no need for manual continuous monitoring of water pumps or manual climbing of slopes with vibrators. The number of operators required for segmented operations is greatly reduced, significantly reducing on-site manpower input and labor intensity. Attached Figure Description

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the casting process of the present invention; Figure 2 This is a three-dimensional illustration of the present invention. Figure 1 ; Figure 3 This is a three-dimensional illustration of the present invention. Figure 2 ; Figure 4 This is a top view of the present invention; Figure 5 This is a three-dimensional illustration of the present invention. Figure 3 ; Figure 6 This is a schematic diagram of the assembly of the frame and the movable frame in this invention.

[0020] The reference numerals in the attached figures are: 1. Pouring crane; 2. Variable frequency submersible pump; 3. Stone hopper; 4. Stone feeding chute; 5. Concrete hopper; 6. Pressure pump; 7. Concrete pipe; 8. Servo motor; 9. Frame; 10. T-shaped guide rod; 11. High frequency vibrator; 12. Movable frame; 13. Drive hydraulic cylinder; 14. Limit roller. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout; the described embodiments are some embodiments of this invention, but not all embodiments; the embodiments and directional terms described below with reference to the accompanying drawings are exemplary and intended to explain this invention, and should not be construed as limiting this invention; all other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention. The embodiments of this invention will be described in detail below with reference to the accompanying drawings: The following is in conjunction with the appendix Figures 1-6 The present invention will be further described in detail below: Example 1 like Figures 2-6As shown, this embodiment discloses a concrete pouring equipment for an inclined retaining wall, including a pouring trolley 1 that moves along the channel extension direction, and a drainage mechanism, a boulders replacement mechanism, a concrete conveying mechanism, and a vibration mechanism located on the pouring trolley 1. The vibration mechanism includes a sliding support and multiple high-frequency vibrators 11. During vibration operation, the multiple high-frequency vibrators 11 move synchronously and slide along the sliding support from the bottom to the top of the inclined template at a uniform speed to vibrate.

[0022] like Figure 5 As shown, the dewatering mechanism includes a variable frequency submersible pump 2 and lightweight manholes pre-installed around the foundation pit. The variable frequency submersible pump 2 can be detachably installed on the pouring trolley 1, and the variable frequency submersible pump 2 is connected to the lightweight manholes through flexible pipes. A groundwater level sensor is detachably installed in the lightweight manholes. The groundwater level sensor is electrically connected to a control system, and the control system is also electrically connected to the variable frequency submersible pump 2. Based on the water level monitored in real time by the groundwater level sensor, the variable frequency submersible pump 2 is automatically adjusted to pump water, so as to stably control the groundwater level at 0.5 to 1.0 m below the foundation.

[0023] like Figure 3 As shown, the riprap replacement mechanism includes a riprap hopper 3 located on the pouring trolley 1. The bottom of the riprap hopper 3 has a riprap discharge port, which is equipped with a discharge valve. A U-shaped riprap feeding chute 4 extends from the riprap discharge port. The discharge valve is electrically connected to the output of the control system. When a dangerous situation occurs in the foundation pit, the discharge valve opens, and the riprap feeding chute 4, connected to the riprap discharge port, can directly deliver riprap to reinforce the pit bottom and walls.

[0024] like Figures 4-5 As shown, the concrete conveying mechanism includes a concrete hopper 5 located on the pouring trolley 1. The side walls of the concrete hopper 5 are respectively provided with a concrete loading port and a concrete discharge port. A pressure pump 6 is installed at the concrete discharge port, and the output end of the pressure pump 6 is connected to a concrete pipe 7. The concrete pipe 7 is a telescopic socket-type concrete pipe, with its end extending into the pre-erected inclined formwork to control the thickness of each pouring layer to 300-500mm, preventing the concrete from sliding and segregating along the inclined surface. A mixing mechanism is rotatably installed inside the concrete hopper 5. The mixing mechanism includes a servo motor 8, a mixing shaft, and a mixing paddle. The output shaft of the servo motor 8 is coaxially arranged with and driven by the mixing shaft, and the mixing paddle is fixedly connected to the mixing shaft.

[0025] like Figure 3 and Figure 6As shown, the sliding support includes a frame 9 that can be detachably installed on the pouring trolley 1. Several T-shaped guide rods 10 arranged in a linear array are arranged inside the frame 9. The upper ends of multiple high-frequency vibrating rods 11 are suspended from the movable frame 12 by spring-damped shock absorbers. The movable frame 12 is slidably connected to the sliding support via a driving hydraulic cylinder 13. Guide rails are provided on both sides of the frame 9. Sliding blocks matching the guide rails are fitted at both ends of the movable frame 12. The movable frame 12 slides against the frame 9 via the sliding blocks. Limiting rollers 14 matching the T-shaped guide rods 10 are rotatably installed at the bottom of the movable frame 12. The limiting rollers 14 roll and limit the movement of the T-shaped guide rods 10, allowing the movable frame 12 to rise and fall smoothly vertically along the frame 9.

[0026] Example 2 like Figure 1 As shown, the concrete pouring method of the inclined retaining wall concrete pouring equipment of the present invention is as follows: Step 1: Pre-erect the inclined retaining wall formwork: Based on the channel cross-sectional dimensions, manually erect, adjust, and fix the steel formwork for the inclined retaining wall within the foundation pit. The steel formwork is supported by conventional steel pipes.

[0027] Step 2: Equipment Arrival and Pre-dewatering and Stabilization of Quicksand Pit: Lightweight manholes are pre-installed around the pit. Groundwater level sensors inside the manholes monitor the water level in real time. The variable frequency submersible pump 2 in the dewatering mechanism is started to automatically pump water and continuously lower the groundwater level to 0.5-1.0m below the base, reducing dynamic water pressure and preventing quicksand. If quicksand is observed, stones are placed in the stone feeding chute 4 to stabilize the soil.

[0028] Step 3: Layered replacement and compaction of base stones: Clean the surface of the base, removing loose soil, silt, quicksand, etc., and repair the pit walls to ensure that the base is flat and solid. Then, lay the stones in four layers through the stone feeding chute, with each layer controlled at a thickness of 300-500mm. Fill the gaps between the stones with crushed stone or stone chips. Finally, use an excavator to compact the stones, with each layer compacted at least three times.

[0029] Step 4: After the replacement layer is completed, the bearing capacity of the base is tested by dynamic penetration test. Only after the standard is met can the pouring process begin: The worker inserts the socket concrete pipe 7 into the inclined formwork, delivers the concrete evenly, and starts the vibration mechanism to vibrate at a uniform speed along the inclined surface. Under the action of the driving hydraulic cylinder 13, the movable frame 12 drives the high-frequency vibrator 11 to slide and vibrate at a uniform speed from bottom to top along the inclined surface. The material placement speed and the vibration sliding speed are linked and matched to prevent concrete cold joints and void defects.

[0030] Step 5: Segmented construction. After the 15m retaining wall of a single segment is poured, the pouring trolley 1 slides longitudinally along the channel to the next construction segment. The gap between the next construction segment and the previous construction segment is 20mm, and asphalt fir wood boards are used to fill the gap. Steps 2 to 4 are repeated to achieve continuous water flow construction of the channel.

[0031] Step 6: After the concrete has cured to the required standard, remove the formwork and modularly disassemble the detachable parts of the pouring crane 1 and transport them to the next construction site.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A concrete pouring device for an inclined retaining wall, characterized in that: It includes a pouring trolley that moves along the channel extension direction, and a drainage mechanism, a boulders replacement mechanism, a concrete conveying mechanism and a vibration mechanism located on the pouring trolley. The vibration mechanism includes a sliding support and multiple high-frequency vibrators. During vibration operation, the multiple high-frequency vibrators move synchronously and slide along the sliding support from the bottom to the top of the inclined template at a uniform speed to vibrate.

2. The concrete pouring equipment for an inclined retaining wall according to claim 1, characterized in that: The dewatering mechanism includes a variable frequency submersible pump and lightweight manholes pre-installed around the foundation pit; the variable frequency submersible pump can be detachably installed on the pouring trolley, and the variable frequency submersible pump is connected to the lightweight manholes through a flexible pipe; a groundwater level sensor is detachably installed in the lightweight manholes, the groundwater level sensor is electrically connected to a control system, and the control system is also electrically connected to the variable frequency submersible pump.

3. The concrete pouring equipment for an inclined retaining wall according to claim 2, characterized in that: The riprap replacement mechanism includes a riprap hopper located on the pouring trolley. The bottom of the riprap hopper is provided with a riprap discharge port, the riprap discharge port is equipped with a discharge valve, and a riprap feeding chute extends from the riprap discharge port.

4. The concrete pouring equipment for an inclined retaining wall according to claim 3, characterized in that: The discharge valve is electrically connected to the output terminal of the control system.

5. The concrete pouring equipment for an inclined retaining wall according to claim 3, characterized in that: The concrete conveying mechanism includes a concrete hopper located on a pouring trolley. The side wall of the concrete hopper is provided with a concrete loading port and a concrete discharge port. A pressure pump is installed at the concrete discharge port, and the output end of the pressure pump is connected to a concrete pipe.

6. The concrete pouring equipment for an inclined retaining wall according to claim 5, characterized in that: A mixing mechanism is rotatably installed inside the concrete hopper. The mixing mechanism includes a servo motor, a mixing shaft, and a mixing paddle. The output shaft of the servo motor is coaxially arranged with the mixing shaft and driven by it. The mixing paddle is fixedly connected to the mixing shaft.

7. The concrete pouring equipment for an inclined retaining wall according to claim 1, characterized in that: The sliding support includes a frame that can be detachably installed on the pouring trolley. Several T-shaped guide rods arranged in a linear array are arranged inside the frame. The upper ends of multiple high-frequency vibrating rods are suspended on the movable frame through spring damping shock absorbers. The movable frame is slidably connected to the sliding support by a driving hydraulic cylinder.

8. The concrete pouring equipment for an inclined retaining wall according to claim 7, characterized in that: The frame has guide rails on both sides, and the movable frame is equipped with slider groups that match the guide rails at both ends. The movable frame slides with the frame through the slider groups, and the bottom of the movable frame is rotatably equipped with a limiting roller that matches the T-shaped guide rod. The limiting roller rolls in contact with the T-shaped guide rod for limiting.

9. A method for pouring concrete for an inclined retaining wall, characterized in that: The concrete pouring method of the inclined retaining wall concrete pouring equipment according to claim 5 includes the following steps: Step 1: Pre-erect the inclined retaining wall formwork: Based on the channel cross-section dimensions, manually erect, adjust and fix the steel formwork for the inclined retaining wall in the foundation pit. The steel formwork is supported by conventional steel pipes. Step 2, Equipment Arrival and Pre-dewatering and Pressure Stabilization of Quicksand Pit: Lightweight manholes are installed around the pit in advance. Groundwater level sensors in the manholes monitor the water level in real time. The variable frequency submersible pump in the dewatering mechanism is started to automatically pump water and continuously lower the groundwater level to 0.5-1.0m below the foundation, reducing dynamic water pressure and preventing quicksand. Step 3: Layered replacement and compaction of base boulders: Clean the surface of the base, removing loose soil, silt, quicksand, etc., and repair the pit walls to ensure that the base is flat and firm. Then, lay the boulders in layers through the boulder feeding chute, with each layer controlled to be 300-500mm thick. Fill the gaps between the boulders with crushed stone or stone chips. Finally, use an excavator to compact the boulders, with each layer compacted at least 3 times. Step 4: After the replacement layer is completed, the bearing capacity of the base is tested by dynamic penetration test. Only after the standard is met can the pouring process begin: Workers insert the socket concrete pipe into the inclined formwork, deliver the concrete evenly, and simultaneously start the vibration mechanism to vibrate at a uniform speed along the inclined surface. The high-frequency vibrator slides and vibrates at a uniform speed from bottom to top along the inclined surface. The material placement speed and the vibration sliding speed are linked and matched to prevent concrete cold joints and void defects. Step 5: Segmented construction. After the 10-20m retaining wall of a single segment is poured, the pouring trolley slides longitudinally along the channel to the next construction segment. The gap between the next construction segment and the previous construction segment is 20mm. Asphalt fir wood boards are used to fill the gap. Steps 2 to 4 are repeated to achieve continuous water flow construction of the channel. Step Six: After the concrete has cured to the required standard, remove the formwork and use a concrete pouring crane to modularly disassemble and transport the concrete to the next construction site.

10. The method for pouring concrete for an inclined retaining wall according to claim 9, characterized in that: In step two, if quicksand is observed, emergency riprap is placed in the riprap chute to stabilize the soil.

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