A bored pile concrete elevation control device

Abstract

The application discloses a bored pile concrete elevation control device, which comprises a suspension component, a floating assembly and a pre-warning mechanism, wherein the suspension component is used for fixed installation at a bored hole opening; the floating assembly comprises a vertically arranged floating rod and a floating part fixedly connected to the bottom of the floating rod, and the floating rod is a length-adjustable structure; compared with the prior art, the floating part is directly placed in the bored hole and independently floats up, the concrete pouring guide pipe and the floating assembly are not in contact with each other, and the movement track of the floating assembly is not restricted by the guide pipe, which fundamentally avoids the possibility that the floating part is inclined and then rubs and clamps the guide pipe due to the concrete pouring pushing force, so that the device can always synchronously and smoothly rise with the concrete liquid surface during the whole pouring process, the indication result is real and reliable, and the accurate process control on the pouring elevation is realized.

Description

Technical Field

[0001] This utility model relates to the field of bored pile construction technology, specifically to a device for controlling the concrete elevation of bored piles. Background Technology

[0002] Drilled piles, as the name suggests, are piles formed by first drilling a hole in the foundation according to the design requirements, then placing a steel cage in the hole, and finally pouring concrete into it. The core principle is: through mechanical drilling, bypassing shallow, weak soil layers, the pile base is placed on a deep, solid bearing layer, and the load of the superstructure is borne jointly by the skin friction around the pile and the end resistance at the pile tip.

[0003] The current construction of bored piles generally relies on manual measurement of concrete surface elevation using measuring ropes or sonic logging tubes at multiple points, which has the following shortcomings: manual readings are affected by mud concentration, line of sight, etc., resulting in large errors; multiple stops of pouring are required for measurement, which is inefficient; in order to avoid mud inclusion in the pile head, the concrete is often poured 50-80cm over, resulting in concrete waste and increased workload for subsequent pile chiseling and construction waste removal.

[0004] To address the aforementioned issues, Chinese Patent Application No. 201811566771.1 discloses a concrete elevation control device for the top of a bored pile. This device includes a float indicator light, telescopic rods, and a concrete grate. The concrete grate has a concrete pouring guide channel in the middle for the concrete pouring guide pipe to pass through, and multiple leakage holes on both sides for concrete slurry to leak out. Two telescopic rods that can extend and retract in the height direction are installed on the concrete grate. Each telescopic rod passes through a suspension ring and has a float indicator light at its top. The suspension ring is fixed to a clamping device, which is movably mounted on a reinforcing cage support. A reinforcing cage lifting ring is installed on the reinforcing cage support, and the lifting ring is suspended from a reinforcing cage suspension beam at the borehole opening of the bored pile. The reinforcing cage suspension beam is supported on both sides by the well wall. Chinese Patent Application No. 202022989953.9 discloses a device for controlling the concrete elevation of the top of a bored pile. This device includes a fixed component located at the pile hole opening and an elevation measuring component located on the fixed component. The elevation measuring component includes an automatic rewinding tape measure, a gravity cylinder, and a pile top elevation marker line. The outer shell of the automatic rewinding tape measure is located on the fixed component. The tape measure's strip extends downwards toward the bottom of the pile hole, and the gravity cylinder is located at the end of the tape measure. The gravity cylinder's weight is greater than the sum of the spring force of the automatic rewinding tape measure and the buoyancy of the upper layer of slurry in the pile hole. The pile top elevation marker line is located on the tape measure, and a distance is formed between the pile top elevation marker line and the gravity cylinder for measuring the concrete elevation of the pile top.

[0005] In the aforementioned prior art, the concrete pouring guide pipe passes through a concrete grate. During concrete pouring, the concrete grate should ideally float on the concrete surface and gradually rise with the increasing concrete level; when the float indicator light moves out of the slurry surface, it can be determined that the concrete pouring level has reached the design elevation. However, in actual construction, due to the thrust generated by concrete pouring, the concrete grate is prone to tilting. Once tilted, friction occurs between the grate and the concrete pouring guide pipe; if the friction is too great, the grate may become stuck in the guide pipe and unable to float normally. In this case, even if concrete continues to be poured and submerges the grate, it still cannot move, thus losing its indicative function of the concrete pouring elevation and making effective process control difficult. Utility Model Content

[0006] The present invention aims to overcome the defects in the prior art and provide a concrete elevation control device for bored piles that ensures smooth upward movement during concrete pouring without jamming.

[0007] To achieve the above-mentioned utility model objectives, the present utility model adopts the following technical solution: a concrete elevation control device for bored piles, comprising a suspension component, a floating component, and an early warning mechanism. The suspension component is used for fixed installation at the borehole opening. The floating component includes a vertically arranged floating rod and a floating element fixedly connected to its bottom. The floating rod has an adjustable length structure. The upper part of the floating rod passes through the suspension component and can be driven by the buoyancy of the floating element to move freely relative to the suspension component in the vertical direction.

[0008] As a preferred embodiment of the present invention, the suspension component includes a suspension plate and a connecting ring disposed on the suspension plate. The top of the suspension plate is horizontally disposed, the floating rod passes through the connecting ring, and the end of the suspension plate is provided with a suspension groove with the opening facing downward.

[0009] As a preferred embodiment of this utility model, one end of the connecting ring is provided with an opening, and a pin is provided at the opening to close the opening.

[0010] In a preferred embodiment of this utility model, the floating rod includes a first float and a second float, the second float being sleeved on the first float, and the first float and the second float being movable relative to each other.

[0011] As a preferred embodiment of this utility model, the second float is provided with a fixing knob for fixing the relative position of the first float and the second float.

[0012] As a preferred embodiment of the present invention, the first float is inserted into the suspension component, a limiting block is provided at the top of the first float, and a scale is provided on the first float along its length direction.

[0013] As a preferred embodiment of the present invention, the floating component includes a support plate and a floating net disposed on the lower surface of the support plate. The support plate is connected to the bottom end of the second float, and a triangular brace is provided between the support plate and the second float.

[0014] As a preferred embodiment of this utility model, the early warning mechanism includes an alarm component disposed on the suspension member and a trigger component disposed on the floating rod. The alarm component and the trigger component cooperate to trigger and send a signal when the floating rod floats to a predetermined height with the concrete liquid surface.

[0015] In a preferred embodiment of this utility model, the alarm component includes a stress sensor and an audible and visual alarm, which are electrically connected.

[0016] As a preferred embodiment of this utility model, the triggering component includes a trigger element that cooperates with the stress sensor and an adjustment knob for adjusting and fixing the trigger element, the adjustment knob being disposed on the first float.

[0017] Compared with the prior art, the beneficial effects of this utility model are: 1. The floating component is placed directly inside the borehole and floats independently. The concrete pouring pipe and the floating component do not contact each other, and the movement trajectory of the floating component is not constrained by the pipe. This fundamentally avoids the possibility of the floating component tilting due to the thrust of concrete pouring, and then rubbing and getting stuck with the pipe. This ensures that the device can rise smoothly and synchronously with the concrete liquid level throughout the entire pouring process. Its indication results are true and reliable, and it achieves precise process control of the pouring elevation. 2. The device adopts a simple structure with suspension and floating rod guidance, which has good stability and is easy to install. The length of the floating rod is adjustable, and one set of devices can flexibly adapt to the construction of bored piles with different hole depths, which has strong versatility and reduces the investment and management costs of equipment; 3. The integrated early warning mechanism can automatically trigger audible and visual alarm signals when the float rises to the predetermined position (i.e., the concrete pouring reaches the design elevation). The signal is clear and unambiguous, eliminating the need for continuous close-range visual monitoring by construction personnel, thus reducing reliance on manual judgment. Especially during construction at night or in harsh environments, it can effectively avoid human error, improve construction efficiency and management level. Because the device can reliably indicate that the concrete level has reached the predetermined elevation and issue an alarm in a timely manner, it can effectively guide construction personnel to stop pouring. This avoids over-pouring (causing concrete waste) or under-pouring (leading to major quality problems such as pile defects and pile breakage) caused by malfunctioning indicators, ensuring the quality of pile formation and reducing potential engineering hazards and safety risks. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a top view of the present invention; Figure 3 This is a schematic diagram of the structure of this utility model after installation; Figure 4 This is a schematic diagram of the structure of this utility model when the alarm is triggered. Reference numerals: Suspension component 1, suspension plate 101, suspension groove 1011, connecting ring 102, opening 1021, pin 1022, floating component 2, floating rod 201, first float 2011, second float 2012, scale 2013, limit block 2014, fixing knob 202, floating part 203, floating net 2031, support plate 2032, triangular brace 2033, early warning mechanism 3, alarm component 301, stress sensor 3011, audible and visual alarm 3012, trigger component 302, trigger part 3021, adjusting knob 3022, concrete pouring conduit 4, steel casing 5. Detailed Implementation

[0019] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0020] like Figures 1-4 As shown, a concrete elevation control device for bored piles includes a suspension component 1, a floating component 2, and an early warning mechanism 3. The suspension component 1 is fixedly installed at the borehole opening. The floating component 2 includes a vertically arranged floating rod 201 and a floating element 203 fixedly connected to its bottom. The floating rod 201 has an adjustable length structure. The upper part of the floating rod 201 passes through the suspension component 1 and can be driven by the buoyancy of the floating element 203 to move freely in the vertical direction relative to the suspension component 1.

[0021] Furthermore, the suspension component 1 is hung on the wall of the steel casing 5 at the borehole opening. The floating rod 201 of the floating component 2 passes through the suspension component 1 and can move freely in the vertical direction within the suspension component 1. The floating element 203 is suspended in the borehole. The concrete pouring conduit 4 is positioned away from the floating component 2. When concrete is poured into the borehole, the surface of the concrete contacts the floating element 203 and pushes the floating element 203 to move the floating rod 201 upward. The movement trajectory of the floating component 2 is not constrained by the concrete pouring conduit 4. This fundamentally avoids the possibility of the floating element 203 tilting due to the thrust of concrete pouring, and thus rubbing and getting stuck with the concrete pouring conduit 4. This ensures that the device can always rise smoothly and synchronously with the concrete surface throughout the entire pouring process. Its indication results are true and reliable, and precise process control of the pouring elevation is achieved.

[0022] The suspension component 1 includes a suspension plate 101 and a connecting ring 102 disposed on the suspension plate 101. The top of the suspension plate 101 is horizontally disposed, and the floating rod 201 passes through the connecting ring 102. The end of the suspension plate 101 is provided with a suspension groove 1011, and the opening of the suspension groove 1011 is disposed downward. Furthermore, the connecting ring 102 is disposed at one end of the suspension plate 101, and the suspension groove 1011 is disposed at the other end of the suspension plate 101. The suspension plate 101 is made of 5mm thick Q235 steel plate. The suspension groove 1011 is an inverted U-shaped buckle, which can be directly hung on the upper edge of the steel casing 5. The top of the suspension plate 101 is provided with a horizontal reference surface, which facilitates the one-time measurement of elevation by GPS or level.

[0023] The connecting ring 102 has an opening 1021 at one end, and a pin 1022 is provided at the opening 1021 to close the opening 1021. Furthermore, the connecting ring 102 is configured as a U-shaped structure, with one end closed and the other end having an opening 1021. The floating rod 201 enters the connecting ring 102 through the opening 1021. The pin 1022 is provided at the opening 1021 of the connecting ring 102 to close the opening 1021, preventing the floating rod 201 from accidentally falling out of the connecting ring 102 during the concrete pouring process.

[0024] The floating rod 201 includes a first float 2011 and a second float 2012. The second float 2012 is sleeved on the first float 2011, and the first float 2011 and the second float 2012 can move relative to each other. Further, the first float 2011 is a stainless steel tube with a wall thickness of Φ14mm×0.5mm, and the second float 2012 is a stainless steel tube with a wall thickness of Φ16mm×0.5mm. The first float 2011 is closed at both ends and has a hollow interior, while the second float 2012 is open at one end and closed at the other end and has a hollow interior. The first float 2011 can move within the second float 2012.

[0025] The second float 2012 is equipped with a fixing knob 202 for fixing the relative position of the first float 2011 and the second float 2012. The fixing knob 202 is located on the wall of the second float 2012 and passes through the wall of the second float 2012, abutting against the first float 2011. The relative length of the first float 2011 and the second float 2012 can be steplessly adjusted by the fixing knob 202, thereby adjusting the length of the entire float 201. In addition, the first float... The length of float 201 should be 1m longer than that of the second float 2012. After stretching, the shortest sleeve length should be controlled above 0.5m. The total weight of the float should be slightly greater than the buoyancy of the same volume of mud, so that it is vertically suspended in the pile hole in a static state. For example, a combination of 6m Φ14 pipe and 5m Φ16 pipe can measure the depth of the pile top in the range of 6m to 10.5m. A combination of 4m Φ14 pipe and 3m Φ16 pipe can measure the depth in the range of 4m to 6.5m. The user can adjust the length of float 201 as needed.

[0026] The first float 2011 is inserted into the suspension component 1. A limiting block 2014 is provided at the top of the first float 2011. The first float 2011 is provided with a scale 2013 along its length. Furthermore, the first float 2011 is inserted into the connecting ring 102. The size of the limiting block 2014 is larger than the size of the connecting ring 102, thereby preventing the first float 2011 from falling out of the connecting ring 102. The scale 2013 is set on the rod wall of the first float 2011. The length of the float 201 can be precisely adjusted by setting the scale 2013.

[0027] The floating component 203 includes a support plate 2032 and a floating net 2031 disposed on the lower surface of the support plate 2032. The support plate 2032 is connected to the bottom end of the second float 2012, and a triangular brace 2033 is provided between the support plate 2032 and the second float 2012. Furthermore, the floating component 203 is located at the bottom end of the second float 2012, and the support plate 2032 is fixedly connected to the second float 2012. The floating net 2031 is woven from Φ1.0mm stainless steel wire into a 20mm×20mm mesh cage with an open bottom, and its shape is like an inverted cup. The side length of the support plate is 100mm, which can be applied to bored piles with a diameter of ≥600mm. When the concrete and stone surface layer enters the cage of the floating net 2031, the cage of the floating net 2031 is subjected to the combined action of upward supporting force and gripping force, which drives the floating rod 201 to rise as a whole.

[0028] The warning mechanism 3 includes an alarm component 301 mounted on the suspension member 1 and a trigger component 302 mounted on the floating rod 201. The alarm component 301 and the trigger component 302 cooperate to trigger and send a signal when the floating rod 201 floats to a predetermined height with the concrete liquid surface. Furthermore, the alarm component 301 is an audible and visual alarm device. The trigger component 302 is mounted on the floating rod 201 and moves upward under the drive of the floating rod 201. When the trigger component 302 moves to the top, it applies a compressive stress to the sensor of the audible and visual alarm device, thereby triggering an alarm prompt.

[0029] Specifically, the alarm component 301 includes a stress sensor 3011 and an audible and visual alarm 3012, which are electrically connected. The trigger component 302 includes a trigger element 3021 that cooperates with the stress sensor 3011 and an adjustment knob 3022 for adjusting and fixing the trigger element 3021. The adjustment knob 3022 is disposed on the first float 2011. Furthermore, the stress sensor 3011 is disposed on the movement path of the trigger element 3021, and the trigger element 3021 is disposed on the first float 2011. When triggered... When component 3021 moves upward with the first float 2011 to the stress sensor 3011, the trigger component 3021 presses against the stress sensor 3011, and the stress sensor 3011 transmits a signal to the audible and visual alarm 3012, thereby causing the audible and visual alarm 3012 to sound an alarm. In addition, the position of the trigger component 3021 on the first float 2011 can be adjusted by the adjustment knob 3022, and the position of the trigger component 3021 can be precisely adjusted according to the scale 2013 set on the first float 2011, thereby achieving the adjustment of the predetermined alarm height.

[0030] Working principle: 1. Installation: Secure the suspension component 1 to the upper edge of the steel casing 5, and use GPS to measure the top elevation of the suspension component; 2. Setting: Adjust the length of the floating rod 201 so that the bottom elevation of the floating net 2031 is equal to the design pile top elevation; 3. Pouring: When the concrete surface rises to the designed pile top elevation, the stones enter the floating net 2031, the floating component 203 gains buoyancy increase, and drives the floating rod 201 to rise; 4. Note: When the top of the floating rod 201 detaches from the suspension component 1, it can be visually determined on site that the concrete surface has reached the design elevation; 5. Over-pouring: Continue pouring slowly. When the trigger 3021 on the floating rod 201 comes into contact with the stress sensor 3011, the audible and visual alarm 3012 will sound an alarm and stop the process, thus completing precise control.

[0031] Example 1: Φ800mm bored pile, hole depth 35m, designed pile top elevation -4.500m.

[0032] 1. Secure the suspension component 1 to the upper edge of the steel casing 5, and measure the top elevation of the suspension component 1 to +2.600m; 2. Adjust the length L of the floating rod 201 to 2.6 – (–4.500) = 7.100m, and lock the fixing knob 202; 3. Start pouring. When the concrete surface rises to -4.500m, the floating rod 201 begins to rise. 4. When the top of the floating rod 201 protrudes 50cm above the top surface of the suspension component 1, the trigger 3021 triggers the stress sensor 3011, and the audible and visual alarm 3012 alarms, the pouring stops, and the final pile top elevation is -4.000m.

[0033] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0034] Although this document frequently uses reference numerals from the accompanying drawings, such as suspension component 1, suspension plate 101, suspension groove 1011, connecting ring 102, opening 1021, pin 1022, floating component 2, floating rod 201, first float 2011, second float 2012, scale 2013, limit block 2014, fixing knob 202, floating part 203, floating net 2031, support plate 2032, triangular brace 2033, warning mechanism 3, alarm component 301, stress sensor 3011, audible and visual alarm 3012, trigger component 302, trigger part 3021, adjusting knob 3022, concrete pouring conduit 4, and steel casing 5, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A device for controlling the concrete elevation of bored piles, characterized in that, The system includes a suspension component (1), a floating assembly (2), and a warning mechanism (3). The suspension component (1) is used to be fixedly installed at the borehole opening. The floating assembly (2) includes a vertically arranged floating rod (201) and a floating element (203) fixedly connected to its bottom. The floating rod (201) has an adjustable length. The upper part of the floating rod (201) passes through the suspension component (1) and can be driven by the buoyancy of the floating element (203) to move freely in the vertical direction relative to the suspension component (1). The floating assembly (2) is set away from the concrete pouring pipe (4) and the two do not contact each other.

2. The concrete elevation control device for bored piles according to claim 1, characterized in that, The suspension component (1) includes a suspension plate (101) and a connecting ring (102) disposed on the suspension plate (101). The top of the suspension plate (101) is horizontally disposed, and the floating rod (201) passes through the connecting ring (102). The end of the suspension plate (101) is provided with a suspension groove (1011), and the opening of the suspension groove (1011) is downward.

3. The concrete elevation control device for bored piles according to claim 2, characterized in that, The connecting ring (102) has an opening (1021) at one end, and a pin (1022) is provided at the opening (1021) to close the opening (1021).

4. The device for controlling the concrete elevation of bored piles according to claim 1, characterized in that, The floating rod (201) includes a first float (2011) and a second float (2012), the second float (2012) being sleeved on the first float (2011), and the first float (2011) and the second float (2012) being movable relative to each other.

5. The concrete elevation control device for bored piles according to claim 4, characterized in that, The second float (2012) is provided with a fixing knob (202) for fixing the relative position of the first float (2011) and the second float (2012).

6. The concrete elevation control device for bored piles according to claim 4, characterized in that, The first float (2011) is inserted into the suspension member (1). The top of the first float (2011) is provided with a limiting block (2014), and the first float (2011) is provided with a scale (2013) set along its length direction.

7. The concrete elevation control device for bored piles according to claim 4, characterized in that, The floating component (203) includes a support plate (2032) and a floating net (2031) disposed on the lower surface of the support plate (2032). The support plate (2032) is connected to the bottom end of the second float (2012), and a triangular brace (2033) is provided between the support plate (2032) and the second float (2012).

8. The concrete elevation control device for bored piles according to claim 4, characterized in that, The warning mechanism (3) includes an alarm component (301) disposed on the suspension member (1) and a trigger component (302) disposed on the floating rod (201). The alarm component (301) and the trigger component (302) cooperate to trigger and send a signal when the floating rod (201) floats to a predetermined height with the concrete liquid surface.

9. A concrete elevation control device for bored piles according to claim 8, characterized in that, The alarm assembly (301) includes a stress sensor (3011) and an audible and visual alarm (3012), which are electrically connected.

10. A concrete elevation control device for bored piles according to claim 9, characterized in that, The triggering assembly (302) includes a trigger element (3021) that cooperates with the stress sensor (3011) and an adjustment knob (3022) for adjusting and fixing the trigger element (3021), the adjustment knob (3022) being disposed on the first float (2011).

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