Device and method for measuring height of over-poured concrete of rotary excavating cast-in-place pile

Abstract

The invention discloses a device and a method for measuring the height of overfilled concrete of a rotary excavating cast-in-place pile. The device comprises a transparent U-shaped pipe which comprises an inner cylinder and an outer cylinder, the outer cylinder is arranged on the outer side of the inner cylinder in a surrounding mode, the inner cylinder and the outer cylinder are each provided with a high end and a low end, the high end of the inner cylinder is flush with the high end of the outer cylinder, the high end of the inner cylinder is open, and the high end of the outer cylinder is closed; the inner cylinder is flush with the lower end of the outer cylinder, and both the lower end of the inner cylinder and the lower end of the outer cylinder are open; the elastic partition plate is arranged in the inner barrel and used for isolating the liquid medium; the first end of the connecting pipe is connected to the lower end of the outer cylinder, and the second end of the connecting pipe extends into the rotary excavating cast-in-place pile; the screen is arranged at the second end of the connecting pipe and used for preventing the particles exceeding the preset size from entering the connecting pipe; the air pumping and deflating device is connected to the high end of the outer cylinder and used for conducting air pumping and deflating operation on the outer cylinder. By means of the device, the boundaries of a water layer, a laitance layer and a concrete layer in the rotary excavating cast-in-place pile can be accurately judged by observing the height change of the liquid level in the transparent U-shaped pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction equipment, and in particular to a device and method for measuring the height of over-cast concrete of a rotary bored cast-in-place pile. Background Art

[0002] As an efficient and environmentally friendly pile foundation construction technology, rotary bored piles are widely used in projects such as bridges, high-rise buildings, and rail transit. Their core process involves "drilling - hole cleaning - reinforcement cage installation - concrete pouring." Controlling the overfill height during the concrete pouring phase is directly related to pile foundation quality and project safety. Overfill height refers to the amount by which the actual pile top exceeds the designed elevation during concrete pouring. It ensures that the laitance layer at the top of the pile is fully removed, ensuring that the concrete density of the effective pile shaft meets the specified level. However, in actual projects, due to complex geological conditions, fluctuating construction processes, and unpredictable laitance layer thickness, precise control of the overfill height presents technical challenges. Insufficient overfilling can lead to mud inclusions at the pile head and insufficient strength; excessive overfilling results in concrete waste, increased pile driving costs, and even altered mechanical properties of the pile shaft. Therefore, systematic research on the mechanisms, methods, and standards for controlling overfill height is crucial for improving pile foundation quality, reducing construction risks, and promoting technological advancement in the industry.

[0003] At present, the control of the overfilling height of rotary bored piles mainly relies on manual experience or traditional rope measurement method (accuracy ±30cm), and some use tied sensors (which need to be pulled out manually) and imported ultrasonic depth sounders. These have the following disadvantages:

[0004] 1. Insufficient accuracy: The rope measurement method has large errors and cannot meet the accuracy requirements of large diameter (>2m) and deep hole (>50m) piles.

[0005] 2. Poor adaptability: Traditional sensors are easily affected by mud interference and steel cage reflection signals and cannot penetrate the floating slurry layer.

[0006] 3. Waste of resources: The overfilling volume generally exceeds the standard value by 20%-50%, resulting in waste of concrete and increased pile drilling costs. Summary of the Invention

[0007] The invention provides a device and method for measuring the height of over-cast concrete of a rotary bored cast-in-place pile, so as to improve the convenience of measuring the height of over-cast concrete of the rotary bored cast-in-place pile.

[0008] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0009] A first aspect of the technical solution of the present invention provides a device for measuring the height of over-cast concrete in a rotary bored cast-in-place pile, comprising:

[0010] A transparent U-shaped tube, comprising an inner tube and an outer tube, wherein the outer tube is disposed around the outside of the inner tube; wherein both the inner tube and the outer tube have high and low ends, the high end of the inner tube is flush with the high end of the outer tube, the high end of the inner tube is open, and the high end of the outer tube is closed; the low end of the inner tube is flush with the low end of the outer tube, and both the low end of the inner tube and the low end of the outer tube are open;

[0011] an elastic partition, disposed in the inner cylinder, for isolating the liquid medium;

[0012] A connecting pipe, wherein the first end of the connecting pipe is connected to the lower end of the outer cylinder, and the second end of the connecting pipe is used to extend into the rotary bored cast-in-place pile;

[0013] a screen disposed at the second end of the connecting pipe to prevent particles exceeding a preset size from entering the connecting pipe;

[0014] The air pumping and exhausting device is connected to the high end of the outer cylinder and is used for performing air pumping and exhausting operations on the outer cylinder.

[0015] Preferably, a first limiting portion is formed on the inner wall of the inner cylinder, and a second limiting portion is formed on the side wall of the elastic partition that contacts the inner wall of the inner cylinder;

[0016] Wherein, the first limiting portion and the second limiting portion are slidably matched to slidably limit the elastic partition.

[0017] Preferably, the first limiting portion is a limiting sliding groove, and the second limiting portion is a limiting protrusion.

[0018] Preferably, the screen is a stainless steel square hole screen with a pore size of 1 to 3 mm;

[0019] The elastic partition is made of nitrile rubber material;

[0020] The transparent U-shaped tube is made of transparent glass material.

[0021] Preferably, the inner diameter of the outer cylinder is equal to the inner diameter of the connecting pipe and smaller than the inner diameter of the inner cylinder.

[0022] A second aspect of the technical solution of the present invention provides a method for measuring the height of overcast concrete using the above-mentioned overcast concrete height measuring device, comprising:

[0023] S1: Take a proper amount of water from the pile hole of the rotary bored cast-in-place pile and inject it into the inner tube of the transparent U-shaped tube so that the liquid levels on both sides of the inner tube are at a preset height from the bottom of the inner tube;

[0024] S2: inserting the second end of the connecting pipe into the water in the pile hole of the rotary bored cast-in-place pile and continuously extending it downward, during which the air pumping and discharging device continuously performs an air filling and discharging operation until the lower ends of the inner tube and the outer tube are filled with liquid and the air pumping and discharging device is closed. When the liquid level at the upper end of the inner tube is higher than the liquid level at the lower end of the outer tube, the second end of the connecting pipe has been inserted into the floating slurry;

[0025] S3: The second end of the connecting pipe is further extended downward. During this process, the air pumping and discharging device is continuously inflated and deflated until the air in the outer cylinder is pumped out by the air pumping and discharging device again. When no more slurry flows into the outer cylinder and the inner cylinder along the connecting pipe, the second end of the connecting pipe has been inserted into the concrete.

[0026] S4: Mark the position of the connecting pipe where it contacts the water surface, pull out the connecting pipe, and measure the length from the marked position to the second end of the connecting pipe, which is the height of the over-filled concrete of the rotary bored cast-in-place pile.

[0027] Preferably, step S2 includes:

[0028] S21: inserting the second end of the connecting pipe into the water in the pile hole of the rotary bored cast-in-place pile, and starting the air extraction and discharge device to slowly extract the air in the outer cylinder of the transparent U-shaped tube, so that the liquid in the rotary bored cast-in-place pile flows into the outer cylinder and the inner cylinder along the connecting pipe, until the lower ends of the inner cylinder and the lower ends of the outer cylinder are filled with liquid, and then closing the air extraction and discharge device;

[0029] S22: starting the air extraction and discharge device and slowly filling the outer cylinder with air so that the liquid in the outer cylinder flows into the column hole of the rotary bored pile along the connecting pipe, until the air pressure in the outer cylinder returns to atmospheric pressure, so that all the liquid in the outer cylinder is discharged into the pile hole of the rotary bored pile;

[0030] S23: Continue to extend the second end of the connecting tube downward and repeat the above steps S21-S22 until the lower ends of the inner tube and the outer tube are filled with liquid, and after the air extraction and discharge device is closed, the liquid at the high end of the inner tube is higher than the liquid level at the high end of the outer tube, and the second end of the connecting tube has been inserted into the slurry.

[0031] Preferably, step S3 includes:

[0032] S31: Activate the air extraction and discharge device and slowly fill the outer tube with air, so that the floating slurry in the outer tube flows along the connecting pipe into the column hole of the rotary bored pile. After the air pressure in the outer tube returns to atmospheric pressure, the floating slurry in the outer tube is completely discharged into the pile hole of the rotary bored pile. At this time, the area in the inner tube from the elastic partition to the upper end of the inner tube is filled with water, and the area from the elastic partition to the lower end of the inner tube is filled with floating slurry.

[0033] S32: The second end of the connecting pipe is further extended downward, and the air extraction and discharge device is activated to slowly extract the air in the outer cylinder of the transparent U-shaped tube, so that the floating slurry in the bored pile enters the outer cylinder and the inner cylinder along the connecting pipe until the lower ends of the inner cylinder and the lower ends of the outer cylinder are filled with liquid, and the air extraction and discharge device is closed;

[0034] S33: Repeat the above steps S31-S32 until the air extraction and degassing device is started again to extract the air in the outer cylinder. No slurry enters the outer cylinder and the inner cylinder along the connecting pipe, and the second end of the connecting pipe has been inserted into the concrete.

[0035] Preferably, it also includes:

[0036] Calculating the overfilling amount of the rotary bored cast-in-place pile based on the overfilling height of the rotary bored cast-in-place pile;

[0037] Concrete pouring is carried out according to the over-pouring amount.

[0038] A third aspect of the technical solution of the present invention provides a construction equipment comprising the above-mentioned over-cast concrete height measuring device.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] (1) In the embodiment of the present invention, the transparent U-shaped tube includes an inner tube and an outer tube, forming a double-layer concentric U-shaped tube communication vessel, and the upper end of the outer tube is sealed. Thus, by utilizing the physical law of air pressure balance and continuously pumping the air through the inflation and deflation device, the water and slurry in the rotary bored pile are drawn into the transparent U-shaped tube. Thus, by observing the changes in the liquid level in the transparent U-shaped tube, the boundaries between the water layer, slurry layer, and concrete layer in the rotary bored pile can be accurately determined. This is simple, direct, easy to use, and the measurement results are more intuitive and reliable.

[0041] (2) The concrete pouring status can be monitored in real time, which greatly improves the ability to control the height of over-pouring concrete in rotary bored piles, thereby accurately controlling the over-pouring volume, significantly reducing material loss and pile drilling costs, and contributing to green construction and sustainable development.

[0042] (3) A double-layer concentric U-shaped tube communication device made of transparent glass tube is used. The manufacturing material is common and easy to obtain, low in price, and easy to replace. Compared with the conventional measurement method of placing technically complex and expensive sensors into the rotary bored pile for measurement, this monitoring device does not need to be immersed in water, which reduces the risk of device damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 A schematic structural diagram of a device for measuring the height of over-cast concrete in a rotary bored cast-in-place pile provided by a first embodiment of the present invention;

[0044] Figure 2 Schematic diagram of the liquid level of the U-shaped tube when the connecting pipe is inserted into the water in the hole of the rotary bored pile in the second embodiment of the present invention;

[0045] Figure 3 Schematic diagram of the liquid level in the U-shaped tube after the air extraction and degassing device has evacuated air when the connecting pipe is inserted into the water in the bored pile hole according to the second embodiment of the present invention;

[0046] Figure 4 Schematic diagram of the liquid level in the U-shaped tube after the air extraction and degassing device is deflated when the connecting pipe is inserted into the water in the bored pile hole according to the second embodiment of the present invention.

[0047] Figure 5 Schematic diagram of the liquid level in the U-shaped tube after the air extraction and degassing device has extracted air when the connecting pipe is inserted into the slurry in the pile hole of the rotary bored cast-in-place pile in the second embodiment of the present invention.

[0048] Figure 6 Schematic diagram of the liquid level in the U-shaped tube after the air extraction and degassing device is deflated when the connecting pipe is inserted into the slurry in the pile hole of the rotary bored cast-in-place pile in the second embodiment of the present invention.

[0049] Figure 7 Schematic diagram of the liquid level in the U-shaped tube after the air extraction and degassing device extracts air when the connecting pipe is inserted into the concrete of the bored pile hole in the second embodiment of the present invention.

[0050] In the accompanying drawings, each reference numeral represents:

[0051] 1. Transparent U-shaped tube; 11. Inner tube; 12. Outer tube; 2. Elastic partition; 3. Connecting pipe; 4. Screen; 5. Air extraction and discharge device; 7. Water; 8. Float; 9. Concrete; 10. Rotary bored cast-in-place pile. DETAILED DESCRIPTION

[0052] In order to make the purposes, features, and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0053] The core idea of ​​the embodiment of the present invention is: using a double-layer concentric U-shaped tube communication device made of a transparent glass tube, based on the communication device principle, using the physical law of air pressure balance to lead the water and slurry in the rotary bored pile into the U-shaped tube. Due to the difference in the physical properties of the density of water and slurry liquids, the boundaries of the water layer, slurry layer and concrete layer in the rotary bored pile can be accurately determined by observing the changes in the liquid level height of the U-shaped tube communication device. Compared with traditional measurement methods, the measurement method of this monitoring device is simpler, more direct, easier to use, and the measurement results are more intuitive and reliable.

[0054] First embodiment:

[0055] like Figure 1 As shown in the figure, a device for measuring the height of over-filled concrete of a rotary bored pile provided by the first embodiment of the present invention comprises a transparent U-shaped tube 1, an elastic partition 2, a connecting tube 3, a screen 4 and a gas extraction and discharge device 5. The transparent U-shaped tube 1 is a double-layer concentric U-shaped tube communication vessel; the connecting tube 3 is used to connect the transparent U-shaped tube 1 with the rotary bored pile 10 (as shown in FIG. Figure 2 The air extraction and discharge device 5 is used to perform air filling and discharging operations on the communicating vessel to guide the water and slurry in the rotary bored pile into the U-shaped tube; the elastic partition 2 and the screen 4 are used to isolate the liquid medium and filter large particles in the process of guiding the water and slurry into the U-shaped tube.

[0056] Specifically, such as Figure 1 As shown, in this embodiment, the transparent U-shaped tube 1 is made of transparent glass and includes an inner tube 11 and an outer tube 12. The outer tube 12 is arranged around the outside of the inner tube 11, thereby forming a double-layer concentric U-shaped tube communication vessel. Furthermore, both the inner tube 11 and the outer tube 12 have two ends (higher on the left and lower on the right in this embodiment). The upper end of the inner tube 11 is flush with the upper end of the outer tube 12, and the upper end of the inner tube 11 is open, while the upper end of the outer tube 12 is closed. The lower end of the inner tube 11 is flush with the lower end of the outer tube 12, and the lower ends of the inner tube 11 and the outer tube 12 are both open.

[0057] like Figure 1 As shown, the elastic partition 2 is arranged in the inner cylinder 11 to isolate the liquid medium. Preferably, the elastic partition 2 is made of a nitrile rubber material. It is understandable that nitrile rubber has moderate elasticity, which enables the elastic partition 2 to produce a certain elastic deformation according to factors such as pressure changes or liquid level fluctuations, thereby better adapting to the working state of the system and playing a role of buffering and sealing. In addition, the nitrile rubber material also has a certain tensile strength and tear strength, can withstand certain external forces without being easily damaged, and ensures the integrity and functionality of the elastic partition in the structure.

[0058] More preferably, in this embodiment, a first limiting portion (e.g., a limiting groove) is formed on the inner wall of the inner cylinder 11, and correspondingly, a second limiting portion (e.g., a limiting protrusion) is formed on the side wall of the elastic diaphragm 2 that contacts the inner wall of the inner cylinder 11. Thus, through the sliding cooperation between the first limiting portion and the second limiting portion, the elastic diaphragm 2 can be slidably limited, thereby preventing the elastic diaphragm 2 from deflecting during movement, which could lead to isolation failure, and ensuring operational stability.

[0059] like Figure 1 As shown, the first end of the connecting pipe 3 (ie Figure 1 The left end of the connecting tube 3 is connected to the lower end of the outer tube 12, and the second end of the connecting tube 3 (i.e. Figure 1 The right end of the connecting tube 3 is used to extend into the bored pile 10, thereby connecting the outer cylinder 12 to the bored pile 10. Thus, by extending the second end of the connecting tube 3 into different positions of the bored pile 10, different media (water or slurry in this embodiment) can be pumped into the transparent U-shaped tube 1.

[0060] In this embodiment, the inner diameter of the outer cylinder 12 is preferably equal to the inner diameter of the connecting tube 3 and smaller than the inner diameter of the inner cylinder 11. For example, in one embodiment, assuming the diameter of the outer cylinder 12 is 180 mm and the diameter of the inner cylinder 11 is 80 mm, the diameter of the connecting tube 3 is (180 - 80) / 2 = 50 mm. It will be appreciated that this dimensional design maintains a high suction efficiency for water or slurry, thereby improving measurement efficiency.

[0061] like Figure 1 As shown, a screen 4 is provided at the second end of the connecting pipe 3 to prevent particles exceeding a predetermined size from entering the connecting pipe 3. Specifically, the screen 4 is a stainless steel square-hole screen with a pore size of 1 to 3 mm, preferably 2 mm, to ensure that water or laitance can smoothly enter the connecting pipe 3 while preventing large-sized concrete particles from entering the connecting pipe 3.

[0062] like Figure 1 As shown, the air extraction and exhaust device 5 is connected to the upper end of the outer tube 12 for performing air extraction and exhaust operations on the outer tube 12. Therefore, when the air extraction and exhaust device 5 is used to extract air, water or slurry is extracted into the connecting pipe 3; when the air extraction and exhaust device 5 is used to exhaust air, the water or slurry is discharged into the bored pile 10.

[0063] Second embodiment:

[0064] Based on the above-mentioned first embodiment, the second embodiment of the present invention provides a method for measuring the height of overfilled concrete in a rotary bored cast-in-place pile, which specifically includes the following steps:

[0065] S1: Measurement preparation

[0066] Specifically, such as Figure 2 As shown, a suitable amount of water 7 is taken from the pile hole of the rotary bored cast-in-place pile 10 and injected into the inner tube 12 of the transparent U-shaped tube so that the liquid levels on both sides of the inner tube 12 are at a preset height (350 mm in this embodiment) from the bottom of the inner tube 12. It is understood that the preset height can be adaptively adjusted as needed and is not specifically limited here.

[0067] S2: Determine the interface between water and slurry.

[0068] After the measurement preparation is completed, the second end of the connecting pipe 3 is inserted into the water 7 of the pile hole of the rotary bored cast-in-place pile and continuously extended downward. During this process, the air pumping and discharging device 5 is continuously charged and discharged until the lower end of the inner tube 12 and the lower end of the outer tube 11 are filled with liquid and the air pumping and discharging device 5 is closed. When the liquid level at the high end of the inner tube 12 is higher than the liquid level at the low end of the outer tube 11, it means that the second end of the connecting pipe has been inserted into the floating slurry 8.

[0069] Specifically, the following steps are included:

[0070] S21: insert the second end of the connecting pipe 3 into the pile hole water 7 of the rotary bored pile 10, and start the air extraction and discharge device 5 to slowly extract the air in the outer tube 11 of the transparent U-shaped tube, so that the water in the rotary bored pile 10 enters the outer tube 11 and the inner tube 12 along the connecting pipe 3, until the lower end of the inner tube 12 and the lower end of the outer tube 11 are filled with liquid, and then close the air extraction and discharge device 5 (i.e.: Figure 3 status shown).

[0071] S22: Start the air extraction and discharge device 5 and slowly fill the outer tube 11 with air, so that the liquid in the outer tube 11 flows into the column hole of the rotary bored pile along the connecting pipe 3, until the air in the outer tube 11 returns to atmospheric pressure, so that all the liquid in the outer tube 11 is discharged into the pile hole of the rotary bored pile 10 (i.e.: Figure 4 status shown).

[0072] S23: Continue to extend the second end of the connecting tube 3 downward, and repeat the above steps S21-S22 until the lower end of the inner tube 12 and the lower end of the outer tube 11 are filled with liquid, and after closing the gas extraction and discharge device 5, the liquid level at the upper end of the inner tube 12 is higher than the liquid level at the upper end of the outer tube 11 (i.e.: Figure 5 status shown).

[0073] It is understandable that Figure 5As can be seen in the figure, since the elastic partition 2 can isolate the slurry 8, once the second end of the connecting tube is inserted into the slurry 8, the slurry 8 will push water to the upper end of the inner tube 12 through the elastic partition 2 under the obstruction of the elastic partition 2, thereby making the liquid level at the upper end of the inner tube 12 (i.e., the water level) higher than the liquid level at the upper end of the outer tube 11 (i.e., the slurry level). Therefore, when the liquid level at the upper end of the inner tube 12 is observed to be higher than the liquid level at the upper end of the outer tube 11, it means that the second end of the connecting tube 3 is inserted into the slurry 8.

[0074] S3: Determine the interface between the laitance and the concrete.

[0075] After the second end of the connecting pipe 3 is inserted into the floating slurry, the second end of the connecting pipe 3 is further extended downward. During this process, the air pumping and releasing device 5 is continuously charged and discharged until the air pumping and releasing device 5 is started again to extract the air in the outer cylinder. When no floating slurry enters the outer cylinder 11 and the inner cylinder 12 along the connecting pipe 3, it means that the second end of the connecting pipe 3 has been inserted into the concrete 9.

[0076] Specifically, the following steps are included:

[0077] S31: Start the air extraction and discharge device 5 and slowly fill the outer cylinder 11 with air, so that the floating slurry in the outer cylinder 11 enters the column hole of the rotary bored pile 10 along the connecting pipe 3, until the air in the outer cylinder 11 returns to atmospheric pressure, so that the floating slurry 8 in the outer cylinder 11 is completely discharged into the pile hole of the rotary bored pile 10.

[0078] It is understandable that if Figure 6 As shown, in the inner tube 12 at this time, the area from the elastic partition 2 to the upper end of the inner tube is water 7, and the area from the elastic partition 2 to the lower end of the inner tube is slurry 8; and the slurry in the outer tube 11 is discharged into the rotary bored cast-in-place pile 10.

[0079] S32: Continue to extend the second end of the connecting pipe 3 downward, and start the air extraction and discharge device 5 to slowly extract the air in the outer tube 11 of the transparent U-shaped tube, so that the floating slurry in the bored pile 10 enters the outer tube and the inner tube along the connecting pipe 3 until the lower ends of the inner tube and the outer tube are filled with liquid, and then close the air extraction and discharge device 5.

[0080] It is understandable that the final state of step S32 is the same as Figure 5 Similarly, the second end of the connecting pipe 3 extends deeper into the slurry 8 .

[0081] S33: Repeat the above steps S31-S32 until the air extraction device 5 is started again to extract the air in the outer cylinder 11. No more slurry enters the outer cylinder and the inner cylinder along the connecting pipe 3. The second end of the connecting pipe 3 has been inserted into the concrete 9 (i.e.: Figure 7 status shown).

[0082] It is understood that when the second end of the connecting tube 3 contacts the concrete 9, the higher density of the concrete will block the opening at the second end of the connecting tube 3, thereby preventing the laitance from being drawn into the transparent U-shaped tube 1. Furthermore, it is important to understand that because the connecting tube 3 descends slowly, the laitance 8 will no longer be drawn into the transparent U-shaped tube 1 after the second end of the connecting tube 3 initially contacts the concrete 9. Based on this, the interface between the laitance and the concrete can be determined.

[0083] S4: Position marking, measuring the height of over-poured concrete.

[0084] After it is determined based on the above step S3 that the second end of the connecting pipe 3 just contacts the concrete 9, the position of the connecting pipe 3 where it contacts the water surface is marked;

[0085] Then, pull out the connecting pipe 3;

[0086] Finally, the length from the marked position to the second end of the connecting pipe 3 is measured, which is the over-concrete height of the rotary bored pile (ie, the total height of water + slurry in the rotary bored pile 10).

[0087] In the above embodiment, preferably, the following steps are further included:

[0088] S5: Concrete pouring.

[0089] After the overfill height of the bored pile is determined based on step S4, the overfill volume of the bored pile is calculated. Then, concrete is poured based on the overfill volume. This allows for precise control of the concrete pouring volume, avoiding overfilling or underfilling.

[0090] On the basis of the above embodiment, a third embodiment of the present invention further provides a construction equipment, which includes the above-mentioned over-pouring concrete height measuring device.

[0091] In the description of this specification, reference to the terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and integrate different embodiments or examples described in this specification, as well as features of different embodiments or examples, unless otherwise inconsistent.

[0092] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0093] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A device for measuring the height of over-cast concrete in a rotary bored pile, characterized in that: include: A transparent U-shaped tube, comprising an inner tube and an outer tube, wherein the outer tube is disposed around the outside of the inner tube; wherein both the inner tube and the outer tube have high and low ends, the high end of the inner tube is flush with the high end of the outer tube, the high end of the inner tube is open, and the high end of the outer tube is closed; the low end of the inner tube is flush with the low end of the outer tube, and both the low end of the inner tube and the low end of the outer tube are open; an elastic partition, disposed in the inner cylinder, for isolating the liquid medium; A connecting pipe, wherein the first end of the connecting pipe is connected to the lower end of the outer cylinder, and the second end of the connecting pipe is used to extend into the rotary bored cast-in-place pile; a screen disposed at the second end of the connecting pipe to prevent particles exceeding a preset size from entering the connecting pipe; The air pumping and exhausting device is connected to the high end of the outer cylinder and is used for performing air pumping and exhausting operations on the outer cylinder.

2. The over-cast concrete height measuring device according to claim 1, characterized in that: A first limiting portion is formed on the inner wall of the inner cylinder, and a second limiting portion is formed on the side wall of the elastic partition that contacts the inner wall of the inner cylinder; Wherein, the first limiting portion and the second limiting portion are slidably matched to slidably limit the elastic partition.

3. The over-cast concrete height measuring device according to claim 2, characterized in that: The first limiting portion is a limiting sliding groove, and the second limiting portion is a limiting protrusion.

4. The over-cast concrete height measuring device according to claim 1, characterized in that: The screen is a stainless steel square hole screen with a pore size of 1 to 3 mm; The elastic partition is made of nitrile rubber material; The transparent U-shaped tube is made of transparent glass material.

5. The over-cast concrete height measuring device according to claim 1, characterized in that: The inner diameter of the outer cylinder is equal to the inner diameter of the connecting pipe and smaller than the inner diameter of the inner cylinder.

6. A method for measuring the height of overcast concrete using the overcast concrete height measuring device according to any one of claims 1 to 5, characterized in that: include: S1: Take a proper amount of water from the pile hole of the rotary bored cast-in-place pile and inject it into the inner tube of the transparent U-shaped tube so that the liquid levels on both sides of the inner tube are at a preset height from the bottom of the inner tube; S2: inserting the second end of the connecting pipe into the water in the pile hole of the rotary bored cast-in-place pile and continuously extending it downward, during which the air pumping and discharging device continuously performs an air filling and discharging operation until the lower ends of the inner tube and the outer tube are filled with liquid and the air pumping and discharging device is closed. When the liquid level at the upper end of the inner tube is higher than the liquid level at the lower end of the outer tube, the second end of the connecting pipe has been inserted into the floating slurry; S3: The second end of the connecting pipe is further extended downward. During this process, the air pumping and discharging device is continuously inflated and deflated until the air in the outer cylinder is pumped out by the air pumping and discharging device again. When no more slurry flows into the outer cylinder and the inner cylinder along the connecting pipe, the second end of the connecting pipe has been inserted into the concrete. S4: Mark the position of the connecting pipe where it contacts the water surface, pull out the connecting pipe, and measure the length from the marked position to the second end of the connecting pipe, which is the height of the over-filled concrete of the rotary bored cast-in-place pile.

7. The method for measuring the height of overcast concrete according to claim 6, wherein The step S2 comprises: S21: inserting the second end of the connecting pipe into the water in the pile hole of the rotary bored cast-in-place pile, and starting the air extraction and discharge device to slowly extract the air in the outer cylinder of the transparent U-shaped tube, so that the liquid in the rotary bored cast-in-place pile flows into the outer cylinder and the inner cylinder along the connecting pipe, until the lower ends of the inner cylinder and the lower ends of the outer cylinder are filled with liquid, and then closing the air extraction and discharge device; S22: starting the air extraction and discharge device and slowly filling the outer cylinder with air so that the liquid in the outer cylinder flows into the column hole of the rotary bored pile along the connecting pipe, until the air pressure in the outer cylinder returns to atmospheric pressure, so that all the liquid in the outer cylinder is discharged into the pile hole of the rotary bored pile; S23: Continue to extend the second end of the connecting tube downward and repeat the above steps S21-S22 until the lower ends of the inner tube and the outer tube are filled with liquid, and after the air extraction and discharge device is closed, the liquid at the high end of the inner tube is higher than the liquid level at the high end of the outer tube, and the second end of the connecting tube has been inserted into the slurry.

8. The method for measuring the height of overcast concrete according to claim 7, wherein The step S3 comprises: S31: Activate the air extraction and discharge device and slowly fill the outer tube with air, so that the floating slurry in the outer tube flows along the connecting pipe into the column hole of the rotary bored pile. After the air pressure in the outer tube returns to atmospheric pressure, the floating slurry in the outer tube is completely discharged into the pile hole of the rotary bored pile. At this time, the area in the inner tube from the elastic partition to the upper end of the inner tube is filled with water, and the area from the elastic partition to the lower end of the inner tube is filled with floating slurry. S32: The second end of the connecting pipe is further extended downward, and the air extraction and discharge device is activated to slowly extract the air in the outer cylinder of the transparent U-shaped tube, so that the floating slurry in the bored pile enters the outer cylinder and the inner cylinder along the connecting pipe until the lower ends of the inner cylinder and the lower ends of the outer cylinder are filled with liquid, and the air extraction and discharge device is closed; S33: Repeat the above steps S31-S32 until the air extraction and degassing device is started again to extract the air in the outer cylinder. No slurry enters the outer cylinder and the inner cylinder along the connecting pipe, and the second end of the connecting pipe has been inserted into the concrete.

9. The method for measuring the height of overcast concrete according to claim 6, wherein Also includes: Calculating the overfilling amount of the rotary bored cast-in-place pile based on the overfilling height of the rotary bored cast-in-place pile; Concrete pouring is carried out according to the over-pouring amount.

10. A construction equipment, characterized in that: The device comprises the over-cast concrete height measuring device according to any one of claims 1 to 5.

Images