Hole depth measuring device for water cast-in-place pile

Abstract

The utility model discloses an overwater cast-in-place pile hole depth measuring device, which belongs to the technical field of constructional engineering construction, and comprises a measuring rope and a shell connected with the measuring rope, and the shell is provided with a drilling machine assembly used for drilling into slurry and an ultrasonic sounding assembly used for measuring the depth of the slurry. According to the utility model, the shell is provided with the ultrasonic sounding assembly, and the ultrasonic sounding assembly is brought into a hole for measurement, so that the hole depth measurement accuracy is improved; the drilling machine assembly is convenient to drill into a sticky slurry layer and brings the shell into the slurry layer and stabilizes the shell in the slurry layer, the influence of different densities of water and the slurry layer is reduced, the situation that the shell shakes and influences work of the ultrasonic sounding assembly can be prevented, and the measurement accuracy of the ultrasonic sounding assembly is improved; the driving assembly can drive the probe of the ultrasonic sounding assembly to move to the position lower than the drill bit, the influence of the drill bit on sound waves is reduced, and the measurement accuracy is high.

Description

Technical Field

[0001] This utility model belongs to the field of construction engineering technology, and specifically relates to a device for measuring the depth of underwater cast-in-place pile holes. Background Technology

[0002] When drilling for cast-in-place piles, the borehole depth must be reached according to the design requirements. After the completion of the borehole in water-filled cast-in-place piles, the depth must be measured during acceptance. The usual method is to use a measuring tape or rope with a weight attached to the top, sink it into the hole, and read the scale. However, in water-filled cast-in-place piles, the borehole is filled with water and mud. The measuring tape or rope may be obstructed by the high density of the mud or heavy objects, preventing it from sinking, or the measuring tape or rope may bend underwater. This affects the accuracy of the borehole depth measurement, making the traditional method of using a measuring rope and weight inaccurate. Some methods use ultrasonic depth sounders for depth measurement, such as the utility model patent (CN 220818918U) entitled "Borehole Inspection Device," which discloses a depth sounding device including an ultrasonic measuring module. However, in this device, the ultrasonic measuring module is located at the top of the pile hole, making depth measurement inaccurate for holes containing mud. Utility Model Content

[0003] The technical problem solved by this utility model is to provide a device for measuring the depth of underwater cast-in-place pile holes to improve the accuracy of hole depth measurement.

[0004] Technical solution: To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0005] A device for measuring the depth of a submerged pile hole includes a measuring rope and a housing connected to the measuring rope. The housing is provided with a drilling rig assembly for drilling into mud and an ultrasonic depth sounding assembly for measuring the depth of the mud.

[0006] Furthermore, the drilling rig assembly includes a control box, a first motor electrically connected to the control box, and a drill bit connected to the first motor. The control box and the first motor are located inside the housing, and the drill bit is located outside the housing. The ultrasonic depth sounding assembly includes a main unit and a probe electrically connected to the main unit. The probe is located outside the housing.

[0007] Furthermore, the housing is provided with a drive assembly for moving the probe downwards.

[0008] Furthermore, the drive assembly is connected to the probe via a drive tube, and the probe is electrically connected to the host via a first cable, which passes through the drive tube.

[0009] Furthermore, the drive assembly includes a base, a lead screw mounted on the base, a second motor connected to the lead screw, and a sliding plate movably connected to the lead screw. The sliding plate is connected to the drive tube, and the second motor is electrically connected to the control box.

[0010] Furthermore, a first antenna is connected to the control box, and the first antenna penetrates the housing wall.

[0011] Furthermore, a second antenna is connected to the host, and the second antenna penetrates the housing wall.

[0012] Furthermore, the drill bit includes a drill rod connected to the first motor, a helical blade disposed on the drill rod, and a tip disposed at the lower end of the drill rod.

[0013] Furthermore, the measuring rope is made of steel wire rope and has scale markings on it.

[0014] Furthermore, when the drive assembly moves the probe to the lowest point, the lower surface of the probe is lower than the lowest point of the drill bit.

[0015] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0016] 1. By installing an ultrasonic depth measuring component on the housing, the ultrasonic depth measuring component is brought into the hole for measurement, thereby improving the accuracy of hole depth measurement;

[0017] 2. A drilling assembly is installed on the shell. The drilling assembly facilitates drilling into the viscous mud layer and brings the shell into and stabilizes it in the mud layer, reducing the influence of the different densities of water and mud. It can also prevent the shell from shaking and affecting the operation of the ultrasonic depth sounding assembly, thus improving the accuracy of the ultrasonic depth sounding assembly.

[0018] 3. The drive component is designed to move the probe of the ultrasonic depth sounding component to a position lower than the drill bit, reducing the influence of the drill bit on the sound waves and resulting in high measurement accuracy. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the housing in an embodiment;

[0021] Figure 3 This is a schematic diagram of the working structure of the ultrasonic depth sounding component in the embodiment;

[0022] Figure 4 This is a schematic diagram of the drilling rig assembly entering the mud state according to an embodiment of this utility model. Detailed Implementation

[0023] The present invention will be further illustrated below with reference to specific embodiments. The embodiments are implemented based on the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0024] like Figure 1 As shown, a device for measuring the depth of a water-filled pile hole includes a measuring rope 1 and a housing 2. The measuring rope 1 is made of steel wire rope. A hook is provided on the top wall of the housing 2. The measuring rope 1 is connected to the hook and locked by a steel wire rope clamp. The housing 2 is a hollow cylindrical shell. A sealing door (not shown in the figure) is provided on the housing 2 to open the internal space of the housing 2.

[0025] like Figure 1 and Figure 2 As shown, the drilling rig assembly is mounted on the housing 2. The drilling rig assembly is used for drilling into the mud. The drilling rig assembly includes a control box 31, a first motor 32, and a drill bit 33. The control box 31 and the first motor 32 are located inside the housing 2. The control box 31 includes a battery, a controller, and a wireless communication module. The battery is electrically connected to the first motor 32. The controller is an existing PLC controller and is electrically connected to the first motor 32. The wireless communication module is an existing built-in transceiver radio used for sending and receiving signals. A wireless remote control corresponding to the controller and wireless communication module is located outside the housing 2. A first antenna 311 connected to the wireless communication module is attached to the control box 31. The first antenna 311 penetrates the wall of the housing 2 for better signal transmission and reception. The battery inside the control box 31 is electrically connected to the first motor 32 to provide power to the first motor 32. The controller is electrically connected to the first motor 32. The first motor 32 is controlled by an internal time program or by receiving commands from a wireless remote control. The drill bit 33 is located outside the housing 2 and includes a drill rod 331, a spiral blade 332, and a tip 333. The drill rod 331 is connected to the first motor 32 and penetrates the bottom wall of the housing 2. When the first motor 32 is working, it drives the drill rod 331 to rotate. The spiral blade 332 is arranged from top to bottom on the side wall of the drill rod 331, and the tip 333 is located at the middle of the bottom of the drill rod 331. When the first motor 32 drives the drill rod 331 to rotate, the drill bit 33 can drill into the mud as a whole. The drill bit 33 drives the housing 2 into the mud. Since the spiral blade 332 has a large contact area with the mud, when the first motor 32 stops working, the drill bit 33 can stabilize the housing 2 in the mud and keep it in its position.

[0026] like Figure 1 , Figure 2 and Figure 3As shown, the ultrasonic depth sounding component is mounted on the housing 2. The ultrasonic depth sounding component is used to measure mud depth. It includes a main unit 41 and a probe 42. The main unit 41 is located inside the housing 2 and connected to the top wall of the housing 2. A second antenna 411 is connected to the main unit 41, penetrating the top wall of the housing 2. A wireless communication module is installed inside the main unit 41. The second antenna 411 receives and transmits signals wirelessly. The probe 42 is electrically connected to the main unit 41 via a first cable 421 and is located outside the housing 2. The device uses an existing wireless ultrasonic depth sounder, such as the Tongda brand, model SM-5 wireless ultrasonic depth sounder manufactured by Jiangsu Tongda Instrument Co., Ltd. Its transmission frequency is 200kHz, depth range is 0.3m-120m, depth accuracy is ±10mm+0.1%h, resolution is 1cm, wireless data transmission is via a built-in transceiver radio (19200bps, transmission distance 1500m), and storage is built-in, capable of storing at least 5000 depth measurement data points. It also has an internal 16.8V lithium battery that can be separately installed.

[0027] like Figure 1 , Figure 2 and Figure 3 As shown, a drive tube 6 is provided inside the housing 2. The drive tube 6 passes through the bottom wall of the housing 2 and is connected to the top of the probe 42. The drive tube 6 is hollow. The first cable 421 passes through the drive tube 6 and is connected to the top of the probe 42. A drive assembly 5 is provided inside the housing 2. The drive assembly 5 is connected to the drive tube 6 and drives the probe 42 to move up and down through the drive tube 6. In this embodiment, the drive assembly 5 is an electric slide (an electric cylinder, hydraulic cylinder, or pneumatic cylinder can also be used as a drive component). The drive assembly 5 includes a base 51, a lead screw 52, ​​a second motor 53, and a slide plate 54. The base 51 is vertically arranged. The lead screw 52 is mounted on the base 51. The second motor 53 is mounted on the base 51 and connected to the lead screw 52. The battery in the control box 31 is electrically connected to the second motor 53 to provide power. The controller inside the control box 31 is electrically connected to the second motor 53 to control the operation of the second motor 31. The control method can be either internal program control or control by receiving commands from an external wireless remote control. The slide plate 54 is movably connected to the lead screw 52. When the second motor 53 is working, it drives the lead screw 52 to rotate, thereby driving the slide plate 54 to move up and down. The slide plate 54 is connected to the top of the drive tube 6. When the slide plate 54 moves up and down, it drives the probe 42 to move up and down through the drive tube 6. When the probe 42 moves to the highest position, the upper surface of the probe 42 is against the outer bottom wall of the housing 2. When the probe 42 moves to the lowest position, the lower surface of the probe 42 is lower than the lowest point of the tip 333. Therefore, the sound waves emitted by the probe 42 downwards will not be affected by the drill bit 33, and the measurement is accurate.

[0028] like Figure 3 and Figure 4As shown, in this embodiment, when the device is in use, the housing 2 is slowly lowered into the hole using the measuring rope 1. When it encounters a mud layer and cannot sink naturally, the first motor 32 is started, the drill bit 33 drills into the mud layer and drives the housing 2 into the mud layer. The first motor 32 is turned off, and at this time the housing 2 is stable in the viscous mud layer. The second motor 53 is started, driving the probe 42 to move downward. Although there is resistance in the mud layer, the resistance is less than the driving force of the drive component 5. The probe 42 moves downward to the lower surface below the lowest point of the tip 333. The ultrasonic depth measuring component starts to work and measures the depth to the bottom of the hole (basically the thickness of the mud layer below the probe 42). The host 41 stores the data and sends it to the external receiver through the second antenna 411. The measuring rope 1 is provided with a scale mark. The scale mark is calculated from the lowest point of the tip 333, so the length of the measuring rope 1 can be read. The length read by the measuring rope 1 plus the depth measured by the ultrasonic depth measuring component is the depth of the hole.

[0029] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A device for measuring the depth of underwater cast-in-place pile holes, characterized in that, It includes a measuring rope (1) and a housing (2) connected to the measuring rope (1), the housing (2) being provided with a drilling rig assembly for drilling into mud and an ultrasonic depth sounding assembly for measuring the depth of mud.

2. The underwater cast-in-place pile hole depth measuring device according to claim 1, characterized in that, The drilling rig assembly includes a control box (31), a first motor (32) electrically connected to the control box (31), and a drill bit (33) connected to the first motor (32). The control box (31) and the first motor (32) are located inside the housing (2), and the drill bit (33) is located outside the housing (2). The ultrasonic depth sounding assembly includes a host (41) and a probe (42) electrically connected to the host (41). The probe (42) is located outside the housing (2).

3. The underwater cast-in-place pile hole depth measuring device according to claim 2, characterized in that, The housing (2) is provided with a drive assembly (5) for moving the probe (42) downward.

4. The underwater cast-in-place pile hole depth measuring device according to claim 3, characterized in that, The drive assembly (5) is connected to the probe (42) via the drive tube (6), and the probe (42) is electrically connected to the host (41) via the first cable (421), which passes through the drive tube (6).

5. The underwater cast-in-place pile hole depth measuring device according to claim 4, characterized in that, The drive assembly (5) includes a base (51), a lead screw (52) mounted on the base (51), a second motor (53) connected to the lead screw (52), and a sliding plate (54) movably connected to the lead screw (52). The sliding plate (54) is connected to the drive tube (6), and the second motor (53) is electrically connected to the control box (31).

6. The underwater cast-in-place pile hole depth measuring device according to claim 2, characterized in that, The control box (31) is connected to a first antenna (311), which penetrates the wall of the housing (2).

7. The underwater cast-in-place pile hole depth measuring device according to claim 2, characterized in that, The host (41) is connected to a second antenna (411), which penetrates the wall of the housing (2).

8. The underwater cast-in-place pile hole depth measuring device according to claim 2, characterized in that, The drill bit (33) includes a drill rod (331) connected to the first motor (32), a spiral blade (332) disposed on the drill rod (331), and a tip (333) disposed at the lower end of the drill rod (331).

9. The underwater cast-in-place pile hole depth measuring device according to claim 1, characterized in that, The measuring rope (1) is made of steel wire rope and has scale markings.

10. The underwater cast-in-place pile hole depth measuring device according to claim 3, characterized in that, When the drive assembly (5) moves the probe (42) to the lowest point, the lower surface of the probe (42) is lower than the lowest point of the drill bit (33).

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