Device for tamping and compacting concrete outside cast-in-place pile reinforcement cage

Abstract

The utility model discloses a device for tamping and compacting concrete outside a cast-in-place pile reinforcement cage. Comprising an inserting and tamping mechanism, a force measuring mechanism, a depth measuring mechanism and a control mechanism, the force measuring mechanism is located at the bottom of the inserting and tamping mechanism, and the depth measuring mechanism is connected with the inserting and tamping mechanism and the force measuring mechanism through a depth collecting line so as to lift the inserting and tamping mechanism and the force measuring mechanism upwards; the control mechanism is connected with the inserting and tamping mechanism, the detection mechanism and the depth measurement mechanism. The control mechanism is adopted for intelligent control, the depth of the inserting and tamping mechanism and the depth of the force measuring mechanism and the dense state of concrete pouring outside the reinforcement cage at the depth can be measured in real time, and the control mechanism adjusts the on-off state of the inserting and tamping mechanism according to the size relation between the acting force measured on the force measuring mechanism and the pore pressure value at the depth. And meanwhile, the depth measuring mechanism can drive the force measuring mechanism and the inserting and tamping mechanism to be lifted upwards.

Description

Technical Field

[0001] This utility model relates to the field of civil engineering technology, and more specifically to a device for compacting the concrete outside the reinforcing cage of a cast-in-place pile. Background Technology

[0002] Cast-in-place piles are widely used in large-scale engineering projects due to their advantages such as high single-pile bearing capacity, simple construction process, and suitability for use in densely built-up areas. The construction of a cast-in-place pile involves first drilling a hole, then lowering a reinforcing cage, and finally pouring concrete. In actual pile foundation projects, the diameter of the reinforcing cage is smaller than the pile diameter; for example, the reinforcing cage diameter for a 1200mm pile is 1056mm, and the diameter for a 1500mm pile is 1356mm. During concrete pouring, a guide pipe is placed inside the reinforcing cage, relying on the fluidity of the concrete to spread it throughout the pile foundation, including the area between the reinforcing cage and the borehole wall.

[0003] Currently, there is not much attention paid to the compaction of the concrete in the area between the reinforcing cage and the borehole wall. Although the space in this area is not large and the concrete can generally fill the area, there may be cases where the reinforcing cage is too dense, the pores are too small, the concrete quality is average, and the pores are blocked. In such cases, there is no concrete or very little concrete in this area, which leads to the pile foundation concrete not adhering to the borehole wall, thereby endangering the integrity of the pile body and the bearing capacity of the pile foundation.

[0004] The patent CN 104404962 A discloses a concrete pile compaction device, but this device only solves the problem of concrete compaction inside the reinforcing cage and does not address the problem of concrete compaction outside the reinforcing cage, which is of great significance to the quality of pile formation. Utility Model Content

[0005] In order to overcome the shortcomings of the above-mentioned technical solutions, the purpose of this utility model is to provide a device for compacting the concrete outside the reinforcing cage of a cast-in-place pile.

[0006] The objective of this utility model is achieved through the following technical solution.

[0007] A device for compacting concrete outside the reinforcing cage of a cast-in-place pile includes a tamping mechanism, a force measuring mechanism, a depth measuring mechanism, and a control mechanism. The force measuring mechanism is located at the bottom of the tamping mechanism. The depth measuring mechanism is connected to the tamping mechanism and the force measuring mechanism via a depth acquisition line to lift the tamping mechanism and the force measuring mechanism upwards. The control mechanism is connected to the tamping mechanism, the detection mechanism, and the depth measuring mechanism. During operation, the tamping mechanism and the force measuring mechanism are placed along the inner wall of the steel casing in the borehole, while the depth measuring mechanism and the control mechanism are located on the ground.

[0008] The force measuring mechanism includes a pressure sensor for sensing the force exerted by the surrounding concrete and feeding it back to the control mechanism; the depth measuring mechanism includes a counter and a driven rotating wheel, with the depth acquisition line wound around the rotating wheel. The counter is positioned above the rotating wheel to detect the distance the depth acquisition line moves, i.e., the depth to which the tamping mechanism and the force measuring mechanism descend, and feeds it back to the control mechanism. The tamping mechanism includes a driven reciprocating tamping rod. When the sensed force meets the requirement of consistency with the pore pressure value at this depth, the control mechanism starts the tamping mechanism to tamp the concrete in the reinforcing cage at that depth until the concrete at that depth is compacted.

[0009] In the above technical solution, the control mechanism is connected to a power source.

[0010] In the above technical solution, the tamping mechanism is installed inside a housing, the force measuring mechanism is installed at the bottom of the housing, and the tamping rod of the tamping mechanism can pass through the housing to tamp the concrete inside the reinforcing cage of the cast-in-place pile.

[0011] In the above technical solution, the tamping mechanism further includes a diamond-shaped telescopic frame and a piston, rocker arm, camshaft, and crankshaft disposed in a piston cylinder. The tamping rod, diamond-shaped telescopic frame, piston, rocker arm, and camshaft are sequentially hinged. The piston cylinder is fixedly disposed. The camshaft and crankshaft are connected by transmission. The crankshaft passes through the piston cylinder and is connected to a motor. The motor is connected to a control mechanism via a tamping control line. The control mechanism drives the crankshaft to move by controlling the motor, which in turn drives the tamping rod to reciprocate. The speed of the tamping rod's reciprocating motion is adjusted by adjusting the rotation speed of the motor.

[0012] In the above technical solution, a protective shell is fitted over the outside of the rhomboid telescopic frame. The protective shell is slidably connected to the piston cylinder and fixedly connected to the end of the tamping rod. The protective shell and the tamping rod move together.

[0013] In the above technical solution, the rhomboid telescopic frame includes four rhomboid connecting rods. Each rhomboid connecting rod forms four hinge points through the connecting rods. There is a common hinge point between two adjacent rhomboid connecting rods. The four rhomboid connecting rods form three common hinge points and two free hinge points located on the same diagonal. The free hinge point located at the first end is hinged to the tamping rod, the free hinge point located at the last end is hinged to the piston, and the common hinge point located at the second end is hinged to the piston cylinder.

[0014] In the above technical solution, the motor is mounted on the tamping mechanism base via a motor base, and the end of the piston cylinder is mounted on the tamping mechanism base, so that the entire tamping mechanism is mounted on the tamping mechanism base.

[0015] In the above technical solution, angle irons are installed on both sides of the end of the piston cylinder, and the angle irons are bolted to the base of the tamping mechanism.

[0016] In the above technical solution, the tamping mechanism base is installed on the inner side wall of the outer shell so that the entire tamping mechanism is set inside the outer shell.

[0017] In the above technical solution, the control mechanism includes a depth display, a force display, and a control housing. The depth display is mounted on the control housing and is connected to a counter for monitoring the depth of the tamping mechanism and the force measuring mechanism. The force display is mounted on the housing and is connected to a pressure sensor for monitoring the force value measured by the pressure sensor.

[0018] The advantages and beneficial effects of this utility model are as follows:

[0019] This invention employs intelligent control of the control mechanism, which can measure the depth of the tamping mechanism and the force measuring mechanism in real time, as well as the compaction state of the concrete poured outside the reinforcing cage at that depth. Based on the relationship between the force measured on the force measuring mechanism and the pore pressure value at that depth, the control mechanism adjusts the on / off state of the tamping mechanism to tamp or not tamp the concrete at that point, ensuring compaction. At the same time, the depth measuring mechanism can drive the force measuring mechanism and the tamping mechanism to lift upwards. This invention can not only detect whether the concrete poured outside the reinforcing cage is compact, but also provide further processing for cases where the concrete is not compacted, ensuring the quality of the pile body concrete. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the device of this utility model.

[0021] Figure 2 This is a schematic diagram of the tamping mechanism of this utility model.

[0022] Figure 3 This is a partial schematic diagram of the tamping mechanism of this utility model.

[0023] Figure 4 This is a schematic diagram of the depth measurement mechanism of this utility model.

[0024] Figure 5 This is a diagram illustrating the application scenario of the device of this utility model.

[0025] Among them, 1: outer shell, 2: tamping mechanism, 2.1: tamping rod, 2.2: diamond telescopic frame, 2.21: diamond connecting rod, 2.22: common hinge point, 2.23: free hinge point, 2.3: piston, 2.4: camshaft, 2.5: crankshaft, 2.6: piston cylinder, 2.7: motor, 2.8: protective shell, 2.9: motor base, 2.10: tamping mechanism base, 2.11: rocker arm, 3: force measuring mechanism, 4: depth measuring mechanism, 4.1: counter, 4.2: rotating wheel, 4.3: rotating wheel base, 5: control mechanism, 6: depth acquisition line, 7: depth transmission line, 8: tamping control line, 9: detection acquisition line, 10: power supply, 11: ground, 12: steel casing, 13: rebar cage, 14: power cord. Detailed Implementation

[0026] The technical solution of this utility model will be further described below with reference to specific embodiments.

[0027] like Figures 1-5 As shown, a device for compacting concrete outside the reinforcing cage of a cast-in-place pile includes a housing 1, a tamping mechanism 2, a force measuring mechanism 3, a depth measuring mechanism 4, and a control mechanism 5. The tamping mechanism 2 is installed inside the housing 1, the force measuring mechanism is installed on the outer bottom surface of the housing 1, the depth measuring mechanism 4 is connected to the tamping mechanism 2 and the force measuring mechanism 3 through a depth acquisition line 6, the control mechanism 5 is connected to the tamping mechanism 2, the force measuring mechanism, and the depth measuring mechanism 4 respectively, and the control mechanism is connected to a power supply 10 through a power cord.

[0028] During operation, the tamping mechanism 2 and the force measuring mechanism 3 are placed in the borehole along the inner wall of the steel casing 12, the reinforcing cage 13 is located in the middle of the steel casing 12, and the depth measuring mechanism 4, the control mechanism 5 and the power supply 10 are located on the ground 11. The depth measuring mechanism 4 is used to measure the depth to which the tamping mechanism 2 and the force measuring mechanism 3 descend outside the reinforcing cage 13, and to provide real-time feedback to the control system. It also uses the depth acquisition line 6 to lift the tamping mechanism 2 and the force measuring mechanism 3 upwards. The force measuring mechanism 3 senses the force exerted by the surrounding concrete at the descent depth in real time and provides real-time feedback to the control mechanism 5. The magnitude of the force reflects the density of the concrete at that depth. The force is compared with the pore pressure value at that depth. When the force and the pore pressure value at that depth meet the consistency requirement (a threshold is set, i.e., until the force equals the pore pressure value plus or minus the threshold), the control mechanism 5 starts the tamping mechanism 2 to tamp the concrete in the reinforcing cage 13 at that depth until the force exceeds the pore pressure value requirement at that depth (a threshold is set, i.e., until the force exceeds the pore pressure value plus the threshold).

[0029] The control mechanism 5 includes a depth display, a force display, and a control housing. The depth display is mounted on the control housing and is connected to the depth measuring mechanism 4. It is used to display the distance the depth acquisition line 6 moves as measured by the depth measuring mechanism 4, that is, the depth of the tamping mechanism 2 and the force measuring mechanism 3. The force display is mounted on the housing and is connected to the force measuring mechanism. It is used to display the force value measured by the force measuring mechanism. Three red and green indicator lights are also provided on the control housing to display the status of the tamping mechanism 2, the force measuring mechanism 3, and the depth measuring mechanism 4. When the tamping mechanism 2 is closed, the force display value is normal (the concrete is poured densely at this depth), and the depth display value decreases at a uniform rate, all three indicator lights are green. When the tamping mechanism 2 is open, the force display value is abnormal (the concrete is not poured densely at this depth), and the depth display value remains basically unchanged, all three indicator lights are red. That is, green indicates that the concrete outside the reinforcing cage 13 is poured densely, and red indicates that the concrete is not poured densely, and the tamping rod 2.1 is working.

[0030] like Figures 2-3 As shown, the tamping mechanism 2 includes a tamping rod 2.1, a diamond-shaped telescopic frame 2.2, and a piston 2.3, a rocker arm 2.11, a camshaft 2.4, and a crankshaft 2.5 disposed within a piston cylinder 2.6. The tamping rod 2.1, the diamond-shaped telescopic frame 2.2, the piston 2.3, the rocker arm 2.11, and the camshaft 2.4 are sequentially hinged. The piston cylinder 2.6 is fixedly disposed. The camshaft 2.4 and the crankshaft 2.5 are connected by a transmission. The crankshaft 2.5 passes through the piston cylinder 2.6 and is connected to a motor 2.7. The motor 2.7 is connected to a control mechanism 5 via a tamping control line. The control mechanism 5 drives the crankshaft 2.5 to move by controlling the motor 2.7, which in turn drives the tamping rod 2.1 to reciprocate. The control mechanism 5 controls the speed of the reciprocating motion of the tamping rod 2.1 by adjusting the rotation speed of the motor 2.7. The diamond-shaped telescopic frame 2.2 is covered with a protective shell 2.8. The protective shell 2.8 is slidably connected to the piston cylinder 2.6. The protective shell 2.8 is fixedly connected to the end of the tamping rod 2.1 so that the protective shell 2.8 and the tamping rod 2.1 move together to prevent concrete from entering the protective shell 2.8. The rhomboid telescopic frame 2.2 includes four rhomboid connecting rods 2.21. Each rhomboid connecting rod 2.21 forms four hinge points through connecting rods. There is a common hinge point 2.22 between two adjacent rhomboid connecting rods 2.21. The four rhomboid connecting rods 2.21 form three common hinge points 2.22 and two free hinge points 2.23 located on the same diagonal. The free hinge point 2.23 at the first end is hinged to the tamping rod 2.1, the free hinge point 2.23 at the last end is hinged to the piston 2.3, and the common hinge point 2.22 at the second last end is hinged to the piston cylinder 2.6, so that the reciprocating stroke of the tamping rod 2.1 is three times the reciprocating stroke of the piston 2.3.

[0031] Furthermore, the motor 2.7 is mounted on the tamping mechanism base 2.10 via the motor base 2.9, and the end of the piston cylinder 2.6 is mounted on the tamping mechanism base 2.10, so that the tamping mechanism 2 is mounted as a whole on the tamping mechanism base 2.10. Angle irons are installed on both sides of the end of the piston cylinder 2.6, and the angle irons are bolted to the tamping mechanism base 2.10. The tamping mechanism base 2.10 is mounted on the inner side wall of the outer shell 1, so that the entire tamping mechanism 2 is set inside the outer shell 1. A hole is opened on the side wall of the outer shell 1, through which the tamping rod 2.1 passes through the outer shell 1 to tamp the concrete inside the cast-in-place pile reinforcement cage 13.

[0032] like Figure 4 As shown, the depth measuring mechanism 4 includes a counter 4.1 and a driven rotating wheel 4.2. The rotating wheel 4.2 is mounted on a rotating wheel base 4.3, and the depth acquisition line 6 is wound around the rotating wheel 4.2. The depth acquisition line 6 is connected to the outer casing 1. The counter 4.1 is positioned above the rotating wheel 4.2 to detect the distance the depth acquisition line 6 moves, that is, to measure the depth of the tamping mechanism 2 and the force measuring mechanism 3. The counter 4.1 is connected to the depth display through a depth transmission line 7 to monitor the depth of the tamping mechanism 2 and the force measuring mechanism 3.

[0033] The force measuring mechanism 3 includes a pressure sensor and a force measuring panel. The pressure sensor is installed on the force measuring panel to sense the force exerted on the force measuring panel by the concrete in contact with it. The pressure sensor is connected to the force value display through the detection acquisition line 9 to monitor the force value measured by the pressure sensor.

[0034] like Figure 5 As shown, the operation method of the device in this embodiment is as follows:

[0035] Step 1: Drill a hole at the target location, and then insert the steel casing and the reinforcing cage 13 in sequence. Next, insert the tamping mechanism 2 and the force measuring mechanism 3 into the hole along the inner wall of the steel casing 12 until the bottom of the force measuring mechanism is on the same horizontal plane as the bottom of the reinforcing cage 13, the diamond-shaped telescopic frame 2.2 is in a compressed state, and the depth measuring mechanism 4, the control mechanism 5 and the power supply 10 are located on the ground 11.

[0036] Step 2: Turn on the power switch 10. The entire tamping and compaction device starts working and pours concrete into the steel cage 13. The pressure sensor senses the force of the surrounding concrete in real time and feeds it back to the force value display. If the force detected by the force value display is greater than the required pore pressure value at that depth, the tamping mechanism 2 is not started, and the rotating wheel 4.2 is driven to rotate. The tamping mechanism 2 and the force measuring mechanism 3 are pulled upward through the depth acquisition line 6. The counter 4.1 measures the depth in real time and feeds it back to the depth display. The depth display shows that the depth value decreases at a uniform speed.

[0037] Step 3: When the force monitored by the force value display decreases to the level required to match the pore pressure value at this depth (at which point the concrete at this depth is not dense), the rotating wheel 4.2 stops rotating, and the upward pulling of the tamping mechanism 2 and the force measuring mechanism 3 stops. The control mechanism 5 starts the tamping mechanism 2, and the tamping rod 2.1 reciprocates to tamp the surrounding concrete. When the force exceeds the required pore pressure value at this depth (at which point the concrete is dense), the tamping mechanism 2 is turned off, and the rotating wheel 4.2 continues to rotate at a constant speed, pulling the tamping mechanism 2 and the force measuring mechanism 3 upward through the depth acquisition line 6.

[0038] Step 4: Repeat the above steps until the concrete pouring is completed, then turn off the power switch 10 and retrieve the device of this embodiment.

[0039] For ease of explanation, spatial relative terms such as “up,” “down,” “left,” and “right” are used in the embodiments to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that, in addition to the orientations shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figures is inverted, an element described as being “down” of other elements or features would be positioned “up” of those other elements or features. Therefore, the exemplary term “down” can encompass both up and down orientations. The device may be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0040] Moreover, relational terms such as “first” and “second” are used merely to distinguish one component from another that has the same name, without necessarily requiring or implying any such actual relationship or order between the components.

[0041] The present invention has been described above by way of example. It should be noted that, without departing from the core of the present invention, any simple modifications, alterations or other equivalent substitutions that can be made by those skilled in the art without creative effort fall within the protection scope of the present invention.

Claims

1. A device for compacting the concrete outside the reinforcing cage of a cast-in-place pile, characterized in that, It includes a tamping mechanism, a force measuring mechanism, a depth measuring mechanism, and a control mechanism. The force measuring mechanism is located at the bottom of the tamping mechanism. The depth measuring mechanism is connected to the tamping mechanism and the force measuring mechanism via a depth acquisition line to lift the tamping mechanism and the force measuring mechanism upwards. The control mechanism is connected to the tamping mechanism, the detection mechanism, and the depth measuring mechanism respectively. During operation, the tamping mechanism and the force measuring mechanism are placed in the borehole along the inner wall of the steel casing, while the depth measuring mechanism and the control mechanism are located on the ground. The force measuring mechanism includes a pressure sensor for sensing the force exerted by the surrounding concrete and feeding it back to the control mechanism; the depth measuring mechanism includes a counter and a driven rotating wheel, with the depth acquisition line wound around the rotating wheel. The counter is positioned above the rotating wheel to detect the distance the depth acquisition line moves, i.e., the depth to which the tamping mechanism and the force measuring mechanism descend, and feeds it back to the control mechanism. The tamping mechanism includes a driven reciprocating tamping rod. When the sensed force meets the requirement of consistency with the pore pressure value at this depth, the control mechanism starts the tamping mechanism to tamp the concrete in the reinforcing cage at that depth until the concrete at that depth is compacted.

2. The apparatus according to claim 1, characterized in that, The control mechanism is connected to a power source.

3. The apparatus according to claim 1, characterized in that, The tamping mechanism is installed inside a housing, and the force measuring mechanism is installed at the bottom of the housing. The tamping rod of the tamping mechanism can pass through the housing to tamp the concrete inside the reinforcing cage of the cast-in-place pile.

4. The apparatus according to claim 3, characterized in that, The tamping mechanism also includes a diamond-shaped telescopic frame and a piston, rocker arm, camshaft, and crankshaft disposed within a piston cylinder. The tamping rod, diamond-shaped telescopic frame, piston, rocker arm, and camshaft are sequentially hinged. The piston cylinder is fixedly disposed. The camshaft and crankshaft are connected by a transmission. The crankshaft passes through the piston cylinder and is connected to a motor. The motor is connected to a control mechanism via a tamping control line. The control mechanism drives the crankshaft to move by controlling the motor, which in turn drives the tamping rod to reciprocate. The speed of the tamping rod's reciprocating motion is adjusted by changing the rotation speed of the motor.

5. The apparatus according to claim 4, characterized in that, The diamond-shaped telescopic frame is covered with a protective shell, which is slidably connected to the piston cylinder and fixedly connected to the end of the tamping rod. The protective shell and the tamping rod move together.

6. The apparatus according to claim 5, characterized in that, The rhomboid telescopic frame includes four rhomboid connecting rods. Each rhomboid connecting rod forms four hinge points through the connecting rods. There is a common hinge point between two adjacent rhomboid connecting rods. The four rhomboid connecting rods form three common hinge points and two free hinge points located on the same diagonal. The free hinge point at the first end is hinged to the tamping rod, the free hinge point at the last end is hinged to the piston, and the common hinge point at the second last end is hinged to the piston cylinder.

7. The apparatus according to claim 4, characterized in that, The motor is mounted on the tamping mechanism base via a motor base, and the end of the piston cylinder is mounted on the tamping mechanism base, so that the entire tamping mechanism is mounted on the tamping mechanism base.

8. The apparatus according to claim 7, characterized in that, Angle irons are installed on both sides of the end of the piston cylinder, and the angle irons are bolted to the base of the tamping mechanism.

9. The apparatus according to claim 7, characterized in that, The tamping mechanism base is mounted on the inner wall of the housing so that the entire tamping mechanism is housed inside the housing.

10. The apparatus according to claim 1, characterized in that, The control mechanism includes a depth display, a force display, and a control housing. The depth display is mounted on the control housing and is connected to a counter for monitoring the depth of the tamping mechanism and the force measuring mechanism. The force display is mounted on the housing and is connected to a pressure sensor for monitoring the force value measured by the pressure sensor.

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