Measuring tool for construction elevation of concrete in mud-jacketed bored pile

Abstract

This utility model discloses a measuring tool for the concrete elevation in slurry-walled cast-in-place piles, relating to the field of building construction technology. The utility model includes a sensor head, a measuring rope, and a control box. The sensor head is connected to the control box via the measuring rope. The control box contains a laser diffuse reflection photoelectric sensor and a pull-ring indexing pin. The measuring rope consists of a top measuring rope and an extension measuring rope. The utility model works by having the sensor head, which has a density greater than slurry, sink to the surface of the slurry. As the concrete buoyancy rises, it triggers the photoelectric sensor, driving an alarm buzzer. This device enables precise control of the concrete elevation below the invisible slurry level. It has a simple structure, is easy to operate, effectively solves the problems of over- or under-grouting, reduces construction costs, and improves pile foundation quality.

Description

Technical Field

[0001] This utility model belongs to the field of building construction technology, and in particular relates to a measuring tool for the concrete construction elevation of cast-in-place piles with mud wall protection. Background Technology

[0002] In the construction of slurry-walled cast-in-place piles, slurry is used to prevent borehole wall collapse. However, its density (approximately 1100 kg / m³) is often higher than that of concrete, causing the concrete surface to be covered by slurry and making direct observation impossible. Traditional methods rely on empirical estimation, which easily leads to over- or under-slurrying: over-slurrying results in concrete waste and increased costs for subsequent chiseling, while under-slurrying causes quality defects. Existing technologies lack quantitative control methods, and the pile top elevation generally deviates by 1-2 meters, resulting in resource waste and low construction efficiency.

[0003] Therefore, we propose a tool for measuring the concrete construction elevation inside slurry wall cast-in-place piles. Utility Model Content

[0004] The purpose of this invention is to provide a measuring tool for the concrete construction elevation in mud-wall cast-in-place piles. When the concrete reaches the preset elevation, an alarm is automatically triggered to ensure consistent pile top elevation, reduce resource waste, and improve construction quality and efficiency.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: This utility model relates to a measuring tool for concrete construction elevation in slurry wall cast-in-place piles. It includes a sensing head, a measuring rope, and a control box. The sensing head and control box are connected via the measuring rope. The control box includes a housing with a pull ring indexing pin installed at the bottom. A laser diffuse reflection photoelectric sensor is installed inside the housing, its position adapted to the telescopic shaft of the pull ring indexing pin. A spring buckle A is provided on the pull ring of the pull ring indexing pin. An optical fiber amplifier is installed on one side of the housing, including a power supply and a buzzer. The measuring rope consists of a top measuring rope and an extension measuring rope. A spring buckle B is installed inside the fixing ring of the sensing head. The upper end of the measuring rope is connected to spring buckle A, and the lower end of the measuring rope is connected to spring buckle B.

[0006] In one embodiment, fixed pull points are provided on the periphery of the top measuring rope at 100mm intervals, the extension measuring rope is 1 meter long, and the extension measuring rope and the top measuring rope are quickly detached by a spring buckle.

[0007] In one embodiment, the sensing head is a hollow cylinder made of galvanized steel with a density of 3158 kg / m³.

[0008] In one embodiment, the indexing pin of the pull ring has a built-in spring. When the sensing head moves up, the spring resets and drives the laser diffuse reflection photoelectric sensor to convert the signal.

[0009] In one embodiment, the laser diffuse reflection photoelectric sensor is electrically connected to an optical fiber amplifier.

[0010] This utility model has the following beneficial effects: Precise elevation control: Through the linkage design of laser diffuse reflection photoelectric sensor and sensing head, real-time monitoring and automatic alarm of concrete pouring elevation can be achieved, and the deviation can be controlled at the centimeter level, which is significantly better than the 1-2 meter error of traditional methods.

[0011] Flexible and convenient structure: The measuring rope adopts a modular design (top measuring rope + extension measuring rope), which can be quickly disassembled through spring buckles to adapt to different stake length requirements and reduce the complexity of operation.

[0012] Strong anti-interference capability: The sensor head is made of high-density galvanized steel (3158 kg / m³), which ensures that it sinks stably in the mud and accurately responds to changes in concrete buoyancy, avoiding misjudgment due to mud interference.

[0013] Cost savings: By precisely controlling the amount of overfilling, concrete waste and subsequent chiseling costs are reduced, while the risk of rework due to underfilling is also reduced.

[0014] Efficient construction: The alarm system (buzzer) immediately prompts construction personnel to stop grouting, reducing manual monitoring time and improving construction efficiency.

[0015] High durability: The measuring rope is made of 1.5mm diameter steel wire rope, which combines lightness and durability; the galvanized steel sensing head is corrosion resistant and extends the service life of the tool.

[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the overall structure of a measuring tool used for measuring the concrete construction elevation inside mud-wall cast-in-place piles; Figure 2 This is a schematic diagram of the internal structure of the control box in this utility model; Figure 3This is a schematic diagram of the measuring rope structure in this utility model; Figure 4 This is a schematic diagram of the structure of the sensing head in this utility model; Figure 5 This is a schematic diagram illustrating the use of this utility model; Figure 6 This is a schematic diagram of the circuit in this utility model.

[0019] The attached diagram lists the components represented by each number as follows: 1. Control box; 2. Measuring rope; 3. Sensor head; 4. Fiber optic amplifier; 5. Laser diffuse reflection photoelectric sensor; 6. Pull ring indexing pin; 7. Box body; 8. Spring buckle A; 9. Top measuring rope; 10. Extended measuring rope; 11. Spring buckle B. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1-6 As shown, this utility model is a measuring tool for concrete construction elevation in mud-wall cast-in-place piles. It includes a sensor head 3, a measuring rope 2, and a control box 1. The sensor head 3 and the control box 1 are connected by the measuring rope 2. The control box 1 includes a box body 7. A pull ring indexing pin 6 is installed at the bottom of the box body 7. A laser diffuse reflection photoelectric sensor 5 is installed inside the box body 7. The position of the laser diffuse reflection photoelectric sensor 5 is adapted to the telescopic shaft of the pull ring indexing pin 6. A spring buckle A8 is provided on the pull ring of the pull ring indexing pin 6. An optical fiber amplifier 4 is provided on one side of the box body 7. The optical fiber amplifier 4 includes a power supply and a buzzer. The measuring rope 2 consists of a top measuring rope 9 and an extended measuring rope 10. A spring buckle B11 is installed in the fixing ring of the sensor head 3. The upper end of the measuring rope 2 is connected to the spring buckle A8, and the lower end of the measuring rope 2 is connected to the spring buckle B11.

[0022] The top measuring rope 9 has fixed pull points with a spacing of 100mm around its sides. The extended measuring rope 10 is 1 meter long and can be quickly detached from the top measuring rope 9 via a spring buckle.

[0023] Among them, the sensor head 3 is a hollow cylinder with a density of 3158 kg / m³ and made of galvanized steel.

[0024] Among them, the pull ring indexing pin 6 has a built-in spring. When the sensing head 3 moves upward, the spring resets and drives the laser diffuse reflection photoelectric sensor 5 to convert the signal.

[0025] Among them, the laser diffuse reflection photoelectric sensor 5 is electrically connected to the fiber optic amplifier 4.

[0026] Please see Figures 1-6 As shown in the figure, this embodiment illustrates the working principle of a measuring tool applied to the concrete construction elevation within a mud-wall cast-in-place pile: Due to the different densities of concrete and mud, the concrete will naturally separate into layers with the mud. Utilizing the difference in buoyancy between the concrete and mud, when the top surface of the cast-in-place pile concrete below the mud surface reaches a predetermined position, the sensor head 3 undergoes a displacement change. The sensor head 3 is connected to the pull ring indexing pin 6 via the measuring rope 2. The telescopic shaft of the pull ring indexing pin 6 cuts the laser diffuse reflection photoelectric sensor 5 to emit a laser beam, which is then used to trigger an alarm via the PNP fiber amplifier 4.

[0027] Operating instructions: 1. Determine the pile length and concrete surface elevation of the cast-in-place pile: According to Article 6.3.30 of the Technical Specification for Building Pile Foundations (JGJ94-2008), the final pouring volume of underwater concrete should be controlled, and the over-pouring height should be 0.8 to 1.0 m.

[0028] 2. Install measuring tools: Secure the measuring tool in a comfortable operating area for the worker. The measuring tool can be hung directly on the concrete hopper.

[0029] 3. Pouring concrete: Concrete construction shall be carried out in accordance with the designed concrete strength.

[0030] 4. The concrete surface has reached the set elevation: As the concrete is continuously poured, it eventually comes into contact with the sensor head 3.

[0031] 5. Finish pouring concrete: The measuring tool emits a buzzer alarm sound, signaling the end of the concrete pouring construction for the cast-in-place pile.

[0032] Further explanation is needed regarding the sensor head 3. Considering that its density must be greater than that of the mud, and it must be able to pull the spring inside the indexing pin when submerged in water, it is designed to have a density of 3158 kg / m³, a weight of 1.5 kg, a diameter of 110 mm, and a wall thickness of 5.3 mm. It is a hollow cylinder made of galvanized steel. The measuring rope 2 is an adjustable length steel wire rope. For ease of operation, the steel wire rope should not be too thick, and a diameter of 1.5 mm is used.

[0033] In the description of this specification, references to terms such as "an embodiment," "example," and "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A measuring tool for measuring the concrete construction elevation within a mud-wall cast-in-place pile, comprising a sensor head (3), a measuring rope (2), and a control box (1), wherein the sensor head (3) and the control box (1) are connected via the measuring rope (2), characterized in that, The control box (1) includes a box body (7), a pull ring indexing pin (6) is installed at the bottom of the box body (7), a laser diffuse reflection photoelectric sensor (5) is installed inside the box body (7), the position of the laser diffuse reflection photoelectric sensor (5) is adapted to the telescopic shaft of the pull ring indexing pin (6), a spring buckle A (8) is provided on the pull ring of the pull ring indexing pin (6), an optical fiber amplifier (4) is provided on one side of the box body (7), the optical fiber amplifier (4) includes a power supply and a buzzer, the measuring rope (2) consists of a top measuring rope (9) and an extended measuring rope (10), a spring buckle B (11) is installed in the fixing ring of the sensing head (3), the upper end of the measuring rope (2) is connected to the spring buckle A (8), and the lower end of the measuring rope (2) is connected to the spring buckle B (11).

2. The measuring tool for measuring the concrete construction elevation inside a mud-wall cast-in-place pile according to claim 1, characterized in that, Fixed pull points are set on the sides of the top measuring rope (9) with a spacing of 100mm. The length of the extended measuring rope (10) is 1 meter. The extended measuring rope (10) and the top measuring rope (9) can be quickly disassembled through spring buckles.

3. The measuring tool for measuring the concrete construction elevation inside a mud-wall cast-in-place pile according to claim 1, characterized in that, The sensor head (3) is a hollow cylinder with a density of 3158 kg / m³ and made of galvanized steel.

4. The measuring tool for measuring the concrete construction elevation inside a mud-wall cast-in-place pile according to claim 1, characterized in that, The pull ring indexing pin (6) has a built-in spring. When the sensing head (3) moves up, the spring resets and drives the laser diffuse reflection photoelectric sensor (5) to convert the signal.

5. The measuring tool for measuring the concrete construction elevation inside a mud-wall cast-in-place pile according to claim 1, characterized in that, The laser diffuse reflection photoelectric sensor (5) is electrically connected to the fiber optic amplifier (4).

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