Pile foundation pore-forming detection device

Abstract

The utility model belongs to the technical field of building construction, and particularly relates to a pile foundation pore-forming detection device which comprises a detection rod, the detection rod is axially connected with a sleeve in a sliding mode, a detection cake is arranged at the bottom end of the sleeve, and an anti-disengaging piece used for preventing the sleeve from sliding out of the bottom end of the detection rod is arranged at the bottom end of the detection rod. A detection cavity is formed in the inner circumferential wall of the sleeve, a distance sensor is arranged in the detection cavity, and a detection piece opposite to the distance sensor is arranged on the detection rod. The axial movement distance of the detection rod is detected in real time through the distance sensor, so that the pile bottom sediment thickness is obtained, reading of measuring rope data is avoided, personal errors are reduced, and the accuracy of detection results is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of building construction, specifically relates to a pile foundation hole forming detection device. BACKGROUND

[0002] As an important component of building engineering foundation, pile bottom sediment is an important factor affecting the bearing capacity of pile foundation, and the thick sediment will produce "soft pad" effect, thereby reducing the pile bearing capacity and increasing the pile settlement. Moreover, for the areas with karst landform characteristics, the hole wall stability is poor after the pile foundation hole forming, and the pile bottom is easy to accumulate sediment, so it is more necessary to detect the thickness of the pile bottom sediment.

[0003] At present, the traditional detection method of the thickness of the pile bottom sediment has many human factors, and it is difficult to obtain accurate detection results. For example, "measuring needle measuring cake method" and "plummet method", the former is to first lower the measuring needle, measure the depth as the hole bottom depth, then lower the measuring cake, measure the depth as the sediment top surface depth, and the difference between the two data is the sediment thickness; the latter is to first gently lower the plummet, measure the depth as the sediment top surface depth, then shake and lower the plummet, measure the depth as the hole bottom depth, and the difference between the two is the sediment thickness. In this way, in the detection process of "measuring needle measuring cake method", the detection personnel need to lower the measuring needle and the measuring cake respectively, and whether the measuring needle sinks to the hole bottom needs to be judged by the detection personnel according to experience; in the detection process of "plummet method", the detection personnel need to master the lightness and heaviness of the plummet according to experience, and whether the plummet sinks to the hole bottom also needs to be judged by the detection personnel according to experience; moreover, both detection methods need to read the data of the measuring rope and then calculate, which has reading error, and the measuring rope also has certain stretching deformation in the stretching process. In this way, the whole detection process not only has more operations, but also the accuracy of the detection result is difficult to guarantee. UTILITY MODEL CONTENTS

[0004] The utility model intends to provide a pile foundation hole forming detection device to solve the problem of low detection result accuracy of the traditional pile bottom sediment thickness detection method.

[0005] In order to achieve the above purpose, the scheme of the utility model is as follows: a pile foundation hole forming detection device, which comprises a detection rod, the detection rod is axially slidably connected with a sleeve, the bottom end of the sleeve is provided with a detection cake, and the bottom end of the detection rod is provided with an anti-dropping piece for preventing the sleeve from sliding out of the bottom end of the detection rod; a detection cavity is arranged on the inner circumferential wall of the sleeve, a distance sensor is arranged in the detection cavity, and a detection piece is arranged on the detection rod and opposite to the distance sensor.

[0006] The working principle and beneficial effects of the scheme are that: in the scheme, the anti-dropping piece at the bottom end of the detection rod is inserted into the pile bottom sediment and contacts with the bottom wall of the pile hole, the horizontal area of the detection cake is large and is trapped on the surface of the pile bottom sediment, so that the relative axial movement occurs between the detection rod and the sleeve, the detection piece on the detection rod moves, the distance sensor detects the axial movement distance of the detection rod in real time during the process and feeds back to the ground, and the sum of the axial movement distance of the detection rod and the axial length of the anti-dropping piece is the thickness of the pile bottom sediment. In the scheme, the measuring rope data does not need to be read, so as to reduce the human error and improve the accuracy of the detection result; and in the scheme, the detection device only needs to be lowered once, the operation is simpler, and the detection personnel are easier to operate.

[0007] Optionally, the detection piece is a ring-shaped plate.

[0008] In the scheme, the sleeve can rotate circumferentially relative to the detection rod, so that when the detection piece is a ring-shaped plate, the axial movement distance of the detection rod can be ensured to be detected by the distance sensor.

[0009] Optionally, the anti-dropping piece is a sharp cone, and the sharp head of the sharp cone faces away from the sleeve.

[0010] In the scheme, the anti-dropping piece has a sharp head, which is easier to be inserted into the pile bottom sediment.

[0011] Optionally, a locking assembly is arranged in the detection cavity, the locking assembly comprises an electromagnet, a magnet arranged opposite to the electromagnet, a connecting rod fixedly connected with the magnet, and an abutting piece fixedly connected with the connecting rod, the electromagnet is fixedly installed in the detection cavity, the electromagnet is externally provided with a waterproof cover, the magnet is horizontally and slidingly connected in the detection cavity, the electromagnet applies magnetic repulsion to the magnet after being electrified, and the abutting piece abuts against the detection rod.

[0012] In the scheme, after the anti-dropping piece is inserted into the pile bottom sediment and contacts with the bottom wall of the pile hole, the electromagnet is electrified, magnetic repulsion is applied to the magnet, the magnet drives the connecting rod and the abutting piece to apply radial abutting force to the detection rod, so as to lock the sleeve on the detection rod. In this way, after the detection device is taken out upward, the distance between the detection cake and the bottom end of the anti-dropping piece can be manually measured, so as to obtain the thickness of the pile bottom sediment. In this way, the thickness of the pile bottom sediment measured by the distance sensor can be verified, and the thickness of the pile bottom sediment can be measured in the case that the distance sensor is damaged.

[0013] Optionally, the number of the locking assemblies is two, and the two locking assemblies are symmetrically distributed on the two sides of the detection rod.

[0014] In the scheme, the sleeve is locked on the detection rod by the two locking assemblies, and the locking effect is better.

[0015] Optionally, a rubber sheet is arranged on the side of the abutting piece facing the detection rod.

[0016] In this solution, a rubber sheet is used to increase the coefficient of friction between the clamping plate and the probe rod, thereby increasing the static friction between the clamping plate and the probe rod, making the fixation between the sleeve and the probe rod more stable.

[0017] Optionally, the abutment is arc-shaped and fits against the outer peripheral wall of the probe rod.

[0018] In this design, the contact area between the clamping plate and the probe rod is increased, the static friction between the clamping plate and the probe rod is increased, and the fixation between the sleeve and the probe rod is more stable.

[0019] Optionally, a camera is fixedly installed on the outer peripheral wall of the sleeve.

[0020] In this solution, the condition of the pile hole wall can be viewed through a camera.

[0021] Optionally, a lighting lamp is fixedly installed on the outer peripheral wall of the sleeve.

[0022] In this solution, lighting is provided to facilitate camera recording.

[0023] Optionally, the probe rod includes several segments, with adjacent segments connected by threads.

[0024] In this scheme, the probe rod is assembled from several stages, so that the axial length of the probe rod is greater than the depth of the pile hole. This allows the testing personnel to apply force to the probe rod, thereby ensuring that the anti-detachment component is inserted into the pile bottom sediment and contacts the bottom wall of the pile hole, thus ensuring the accuracy of the pile bottom sediment detection results. Attached Figure Description

[0025] Figure 1 This is a longitudinal sectional view of a pile foundation borehole detection device according to Embodiment 1 of this utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the anti-detachment component inserted into the sediment at the bottom of the pile in Embodiment 1 of this utility model;

[0027] Figure 3 This is a longitudinal sectional view of a pile foundation borehole detection device according to Embodiment 2 of this utility model;

[0028] Figure 4 for Figure 3 A cross-sectional view along the AA direction;

[0029] Figure 5 This is a schematic diagram of the structure of a pile foundation borehole detection device according to Embodiment 3 of this utility model;

[0030] Figure 6 for Figure 5 Top view;

[0031] Figure 7 This is a schematic diagram of the probe rod in Embodiment 4 of this utility model;

[0032] Figure 8 This is a schematic diagram of the structure when the first segment and the second segment are split in Embodiment 4 of this utility model. Detailed Implementation

[0033] The following detailed description illustrates the specific implementation method:

[0034] The markings in the accompanying drawings include: 1. Detector rod, 110. First section, 120. Second section, 130. External thread section, 2. Sleeve, 3. Detector disc, 4. Anti-detachment component, 5. Detection cavity, 6. Distance sensor, 7. Detection component, 8. Display, 9. Suspension rope, 10. Electromagnet, 11. Magnet, 12. Connecting rod, 13. Clamping plate, 14. Waterproof cover, 15. Rubber sheet, 16. Camera, 17. Illumination lamp.

[0035] Example 1

[0036] This embodiment is basically as follows: Figure 1 and Figure 2 As shown: A pile foundation drilling detection device includes a detection rod 1, a sleeve 2 slidably connected to the detection rod 1, a detection disc 3 integrally formed at the bottom end of the sleeve 2, and an anti-detachment component 4 welded to the bottom end of the detection rod 1 to prevent the sleeve 2 from slipping out of the bottom end of the detection rod 1. The anti-detachment component 4 is a pointed cone with its tip pointing downwards. A detection cavity 5 is provided on the inner peripheral wall of the sleeve 2, and a distance sensor 6 is provided in the detection cavity 5. A detection component 7, which is an annular plate, is welded to the detection rod 1 opposite to the distance sensor 6. In this embodiment, the distance sensor 6 is an underwater ranging sensor, and the model can be selected as M33 patch type. The distance sensor 6 is electrically connected to a display 8 via wires to display the distance value detected by the distance sensor 6. The display 8 is located on the ground for the detection personnel to read the displayed data.

[0037] In practical use, the top of the detection rod 1 is secured with a suspension rope 9. The inspector lowers the detection rod 1 into the pile hole and lowers the detection device by lowering the suspension rope 9. When the detection device contacts the pile bottom sediment, because the bottom end of the anti-detachment component 4 has a pointed tip, and the horizontal area of ​​the detection cake 3 is large, the anti-detachment component 4 inserts into the pile bottom sediment under gravity, while the detection cake 3 is obstructed by the pile bottom sediment and remains on its surface. Figure 2As shown. During this process, relative axial movement occurs between the probe rod 1 and the sleeve 2. The sleeve 2 remains stationary, while the probe rod 1 moves downward. The detection element 7 on the probe rod 1 moves downward accordingly. The distance sensor 6 detects the distance between itself and the detection element 7 in real time and transmits the distance information to the display 8 on the ground. After the bottom end of the anti-detachment element 4 contacts the bottom wall of the pile hole, the distance data on the display 8 no longer changes. The difference between this distance data and the initial distance data (the distance measured by the distance sensor 6 when the bottom end of the sleeve 2 touches the anti-detachment element 4 is the initial distance) is the axial movement distance of the probe rod 1, denoted as d1; the axial length (height) of the anti-detachment element 4 is d2, and the sum of d1 and d2 is the thickness of the sediment at the bottom of the pile. Thus, the method for determining the thickness of the sediment at the bottom of the pile in this embodiment is simple and efficient. It only requires lowering the detection device once and does not require the detection personnel to read the measurement rope data, reducing human error and thus improving the accuracy of the detection results.

[0038] Example 2

[0039] The difference between this embodiment and Embodiment 1 is that: Figure 3 and Figure 4 As shown, the detection chamber 5 is equipped with a locking assembly, consisting of two sets symmetrically distributed on both sides of the detection rod 1. The locking assembly includes an electromagnet 10, a magnet 11 opposite to the electromagnet 10, a connecting rod 12 fixedly connected to the magnet 11, and a clamping plate 13 fixedly connected to the connecting rod 12. The electromagnet 10 is fixedly installed inside the detection chamber 5 and is covered by a waterproof cover 14. The magnet 11 is horizontally slidably connected inside the detection chamber 5. When the electromagnet 10 is energized, it applies a magnetic repulsive force to the magnet 11, causing the clamping plate 13 to press against the detection rod 1. Furthermore, the switch for controlling the on / off state of the electromagnet 10 and the power supply for the electromagnet 10 are located on the ground, allowing the testing personnel to control the on / off state of the electromagnet 10. The clamping plate 13 is arc-shaped and can fit against the outer peripheral wall of the detection rod 1. A rubber sheet 15 is adhered to the side of the clamping plate 13 facing the detection rod 1. The probe rod 1 has a scale line, and the zero mark of the scale line coincides with the bottom end of the anti-detachment component 4.

[0040] In practical use, the testing personnel lower the detection device into the pile hole using the hoisting rope 9. Following the process described in Example 1, d1 is obtained. The sum of d1 and d2 is the thickness of the sediment at the bottom of the pile. When the bottom end of the anti-detachment component 4 contacts the bottom wall of the pile hole, the testing personnel close the switch controlling the on / off state of the electromagnet 10. The electromagnet 10 is energized, applying a magnetic repulsive force to the magnet 11. The magnet 11 slides towards the detection rod 1, and through the connecting rod 12, it drives the clamping plate 13 to move towards the detection rod 1. The clamping plate 13 abuts against the detection rod 1, thus clamping the detection rod 1 and locking the sleeve 2 onto it. Therefore, during the process of the testing personnel lifting and retrieving the detection device using the hoisting rope 9, the sleeve 2 and the detection rod 1 remain relatively stationary. After the detection device is retrieved, the testing personnel can read the scale value on the detection rod 1 corresponding to the bottom surface of the detection disc 3, which is the thickness of the sediment at the bottom of the pile.

[0041] Thus, the thickness of the pile bottom sediment read by the scale line on the probe rod 1 can be mutually verified with the thickness of the pile bottom sediment measured by the distance sensor 6, thereby further improving the accuracy of the detection results. Moreover, in this embodiment, when the distance sensor 6 malfunctions, the thickness of the pile bottom sediment can still be obtained through the scale line.

[0042] In this embodiment, after the electromagnet 10 is de-energized, the magnetic repulsion force of the electromagnet 10 on the magnet 11 disappears, and the magnet 11 has a magnetic attraction force on the electromagnet 10, thereby causing the magnet 11 to drive the connecting rod 12 and the clamping plate 13 to move and reset, releasing the locking of the sleeve 2 without affecting the axial sliding between the sleeve 2 and the probe rod 1.

[0043] Example 3

[0044] The difference between this embodiment and Embodiment 2 is that: Figure 5 and Figure 6 As shown, a camera 16 and a lighting lamp 17 are fixedly installed on the outer peripheral wall of the casing 2. In this embodiment, there are three cameras 16, evenly distributed along the circumference of the casing 2, and four lighting lamps 17, also evenly distributed along the circumference of the casing 2, thereby illuminating the interior of the pile hole and facilitating the cameras 16 to capture clear images of the hole wall. The cameras 16 are electrically connected via wires to a display screen for displaying the images captured by the cameras 16. The display screen is located on the ground for inspection personnel to view. Furthermore, the camera 16 is an underwater camera.

[0045] In this embodiment, during the process of the inspection personnel lowering the detection device using the hoisting rope 9, the camera 16 captures real-time images of the pile hole wall, and the inspection personnel can view the condition of the pile hole wall on the display screen.

[0046] Example 4

[0047] The difference between this embodiment and Embodiment 1 or Embodiment 2 is that:Figure 7 and Figure 8 As shown, the probe 1 comprises several segments, with adjacent segments connected by threads. Specifically, for ease of description, the segment with the anti-detachment component 4 is referred to as the first segment 110, and the remaining segments are referred to as the second segments 120. The first segment 110 is a solid round steel tube, and the second segment 120 is a hollow round steel tube. Both the top end of the first segment 110 and the top end of the second segment 120 are provided with external threaded sections 130, and the bottom end of the second segment 120 is provided with an internal threaded section that engages with the external threaded section 130.

[0048] In this embodiment, a suitable number of secondary segments 120 are selected and spliced ​​according to the depth of the pile hole, so that the axial length of the spliced ​​probe rod 1 is greater than the depth of the pile hole. During splicing, the top of the primary segment 120 is tied with a hoisting rope 9 and suspended by a crane; then, the inspector threaded the second secondary segment 120 onto the suspended secondary segment 120, and so on, until all the selected secondary segments 120 are spliced. During this process, the crane is used to adjust the suspension height to complete the splicing of the secondary segments 120; then, the first segment 110 is threaded onto the corresponding secondary segment 120, thereby completing the splicing of the probe rod 1; finally, the probe rod 1 is lowered into the pile hole by a crane to detect the thickness of the sediment at the bottom of the pile. Since the axial length of the probe rod 1 is greater than the depth of the pile hole, when the anti-detachment component 4 is inserted into the pile bottom sediment, the inspector can apply downward pressure to the probe rod 1 to ensure that the bottom end of the anti-detachment component 4 contacts the bottom wall of the pile hole, thus preventing the gravel in the pile bottom sediment from hindering the anti-detachment component 4 from penetrating the pile bottom sediment; moreover, the inspector can also rotate the probe rod 1 so that the bottom end of the anti-detachment component 4 is screwed in and contacts the bottom wall of the pile hole.

[0049] After the inspection is completed, the probe rod 1 is lifted up by a crane. The inspectors separate the first segment 110 from the second segment 120, and then separate the adjacent second segment 120. The probe rod 1 can then be disassembled and stored.

[0050] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness or practicality of this utility model. The specific embodiments described in the specification can be used to interpret the claims.

Claims

1. A pile foundation borehole detection device, comprising a detection rod, characterized in that: The probe rod is axially slidably connected to a sleeve, the bottom end of which is provided with a probe disc, and the bottom end of the probe rod is provided with an anti-detachment component to prevent the sleeve from sliding out of the bottom end of the probe rod; the inner circumferential wall of the sleeve is provided with a detection cavity, the detection cavity is provided with a distance sensor, and the probe rod is provided with a detection component opposite to the distance sensor.

2. The pile foundation borehole detection device according to claim 1, characterized in that: The detection component is a ring-shaped plate.

3. The pile foundation borehole detection device according to claim 1, characterized in that: The anti-detachment component is a pointed cone, with the pointed tip facing away from the sleeve.

4. The pile foundation borehole detection device according to claim 1, characterized in that: The detection chamber is equipped with a locking assembly, which includes an electromagnet, a magnet disposed opposite to the electromagnet, a connecting rod fixedly connected to the magnet, and a clamping plate fixedly connected to the connecting rod. The electromagnet is fixedly installed in the detection chamber and is covered with a waterproof cover. The magnet is horizontally slidably connected in the detection chamber. When the electromagnet is energized, it applies a magnetic repulsive force to the magnet, and the clamping plate clamps the detection rod.

5. The pile foundation borehole detection device according to claim 4, characterized in that: The number of locking components is two sets, and the two sets of locking components are symmetrically distributed on both sides of the probe rod.

6. The pile foundation borehole detection device according to claim 4, characterized in that: The abutment plate has a rubber sheet on the side facing the probe rod.

7. The pile foundation borehole detection device according to claim 4, characterized in that: The clamping plate is arc-shaped and fits against the outer peripheral wall of the probe rod.

8. The pile foundation borehole detection device according to claim 1, characterized in that: A camera is fixedly installed on the outer peripheral wall of the sleeve.

9. The pile foundation borehole detection device according to claim 8, characterized in that: A lighting lamp is fixedly installed on the outer peripheral wall of the sleeve.

10. The pile foundation borehole detection device according to claim 1, characterized in that: The probe rod comprises several segments, with adjacent segments connected by threads.

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