Cast-in-situ bored pile hole explorer capable of self-adapting to radian and using method

Abstract

The invention discloses a radian-self-adaptive bored pile hole explorer and a using method, and relates to the technical field of metering detection of bored pile bored surfaces. On the first aspect, the radian-self-adaptive bored pile hole explorer comprises a fixing rod used for being connected with telescopic equipment and a sleeve connected to the exterior of the fixing rod in a threaded mode; at least three swing rods are annularly and evenly arranged outside the sleeve and hinged to the sleeve, the ends, away from the sleeve, of the swing rods are hinged to connecting ends, the connecting ends are connected with a supporting roll arranged around the sleeve, and a detection mechanism is arranged at the bottom of the supporting roll. And on the second aspect, the using method of the camber-adaptive cast-in-situ bored pile hole explorer is applied to the camber-adaptive cast-in-situ bored pile hole explorer, a gap between the hole explorer and a bored hole of a cast-in-situ pile can be reduced as much as possible, the radian of the outer contour of the hole explorer is gradually increased along with increasing of the radius, and therefore the radian of the outer contour of the hole explorer is gradually increased. Therefore, the detection precision of the inner wall of the drill hole is improved.

Description

Technical Field

[0001] The invention relates to the technical field of metering and detecting the surface of bored piles, and in particular to a bored pile hole detector with an adaptive arc and a use method thereof. Background Art

[0002] Bored piles are a type of foundation structure formed by mechanical drilling, placing steel cages and pouring concrete. They are widely used in high-rise buildings, bridges, ports and other projects. Their core function is to transfer the upper load to deep stable soil or rock layers to improve the bearing capacity of the foundation. They are suitable for a variety of geological conditions such as soft soil, sand layers, gravel layers and some rock layers.

[0003] After the bored pile is drilled, the internal condition of the bored pile needs to be detected to avoid bulges, shrinkage holes, tilting, etc. The existing bored pile hole detector, as described in the Chinese patent application with publication number CN114351772B, can detect bored piles with different hole diameters.

[0004] However, the prior art relies on increasing the distance between the arc-shaped fixed column and the fixed rod to expand the overall outer diameter of the borehole detector. However, since the fixed column is in an arc shape, even if the gap between adjacent fixed columns is compensated by the arc-shaped moving rod, there will be an obvious gap between the overall contour formed and the full circle formed by the inner wall of the borehole, and no pressure sensor is provided on the arc-shaped moving rod, making it difficult to accurately detect the arc-shaped moving rod. Summary of the invention

[0005] The object of the present invention is to provide a bored pile borer with an adaptive curvature and a method of use, which can minimize the gap between the borer and the bored hole of the bored pile, so that the curvature of the outer contour of the borer gradually increases with the increase of the radius, thereby improving the accuracy of detecting the inner wall of the borehole.

[0006] In order to solve the above technical problems, the present invention adopts the following solutions: In the first aspect, a bored pile borehole detector with adaptive curvature includes a fixed rod for connecting to a telescopic device and a sleeve threadedly connected to the outside of the fixed rod. The outside of the sleeve is evenly provided with at least three swing rods in a ring shape. The swing rod is hinged to the sleeve. The end of the swing rod away from the sleeve is hinged with a connecting end. The connecting end is connected to a support roll arranged around the sleeve. A detection mechanism is provided at the bottom of the support roll. The telescopic device adopts any linear drive device in the prior art, such as a cylinder, a crane, etc. The connection method for connecting the telescopic device to the fixed rod can adopt the prior art and will not be elaborated. The support roll is in the shape of a profile. The support roll can be made of a plastic material with slight elastic deformation, that is, a material that can make the outer contour of the support roll approximately cylindrical when the support roll is rolled up, such as rubber, aluminum roll, etc. At least four swing rods are evenly distributed on the outside of the sleeve in a centrally symmetrical manner in the vertical plane where the sleeve is located radially. When the elasticity of the material used for the support roll is too large, when the support roll is expanded or contracted due to the rotation of the sleeve and driven by the swing rod, the support roll will have a greater tendency to recover the deformation, and the support roll will transmit radial force to the connecting end. Since the front and rear ends of the swing rod are respectively hinged to the sleeve and the connecting end, the radial force transmitted to the connecting end by the support roll will be decomposed into the radial force of the swing rod on the sleeve and the axial force of the swing rod on the sleeve. Since the swing rod is symmetrically arranged outside the sleeve, the radial forces of the swing rod on the sleeve cancel each other out, and the axial force of the swing rod on the sleeve is blocked by the thread inside the sleeve due to the self-locking property of the thread itself against axial movement, that is, the force of the support roll on the sleeve can hardly move the sleeve. A locking bolt arranged along the radial direction of the sleeve is threadedly connected to the section of the sleeve side wall where no thread is provided, and the friction between the locking bolt and the fixing rod is increased by squeezing the fixing rod by the locking bolt. After the sleeve is rotated to the desired position, the locking bolt is tightened to further improve the fixing of the sleeve position. Its function is that, through the arrangement of the support roll and the sleeve, the support roll can expand or contract following the expansion or retraction of the swing rod when the sleeve is rotated. Due to the characteristics of the shape and structure of the support roll itself, when the support roll expands or contracts, the curvature of the outer wall of the support roll can change evenly with the change of the outer diameter of the support roll, and the outer wall of the support roll can always maintain a profile extremely close to a perfect circle. The thinner the support roll is, the closer the outer profile of the support roll is to a perfect circle, the smaller the gap between the support roll and the borehole is, and the more accurate the detection mechanism at the bottom of the support roll is for detecting the inner wall of the borehole.

[0007] Furthermore, at least three telescopic rods are evenly distributed in a ring outside the fixed rod, and one end of the telescopic rod away from the fixed rod is connected to the support roll. The telescopic rod is fixedly connected to the fixed rod. Its function is to limit the movement of the support roll along the axial direction of the fixed rod through the setting of the telescopic rod, so that when the swing rod swings on the sleeve, the support roll can only expand or contract along the radial direction of the fixed rod, and will not be driven by the swing rod to move up and down, affecting the expansion or contraction effect of the support roll.

[0008] Furthermore, an annular groove is provided on the wall surface of the support roll facing the fixed rod, an active embedding part for embedding into the annular groove is provided on the connecting end, a driven embedding part is provided at one end of the telescopic rod away from the fixed rod, the annular groove includes an active annular groove and a driven annular groove, the active embedding part is located in the active annular groove, the driven embedding part is located in the driven embedding part, and baffles for preventing the active embedding part or the driven embedding part from falling off from the annular groove along the radial direction of the fixed rod are provided at the upper and lower ends of the annular groove on the side facing the fixed rod. That is, there is a sliding connection between the telescopic rod and the support roll, specifically, the driven embedding part slides in the annular groove. Its function is that, through the arrangement of the annular groove, the active embedding part and the driven embedding part, when the outer wall of the support roll expands or contracts, the active embedding part and the driven embedding part can move in the annular groove, so that the inner wall of the support roll can expand or contract synchronously with the outer wall.

[0009] Furthermore, the support roll has an area where the inner and outer layers overlap, and a protrusion for embedding into the annular groove is provided on the wall surface of the support roll facing away from the fixing rod. A sealing plug having the same shape and size as the annular groove is provided on the end surface of the innermost annular groove of the support roll to prevent the active embedding part or the driven embedding part from detaching from the end surface of the annular groove. Its function is that, by designing the support roll with an area where the inner and outer layers overlap, the support roll can have space to expand outward while maintaining the continuity of the outer wall contour, and avoid the formation of gaps between the outer walls when the support roll expands.

[0010] Furthermore, the protrusion includes a limiting portion for contacting the inner wall of the baffle. Its function is that, through the setting of the limiting portion, in the overlapping area of ​​the support rolls, the limiting portion on the outer wall of the inner support roll can be stuck in the annular groove on the inner wall of the outer support roll, even if the limiting portion can only enter the annular groove from the end of the annular groove, so as to achieve the effect of fixing the two adjacent layers of support rolls, so that each layer of the support roll can be synchronously and evenly expanded or contracted.

[0011] Furthermore, the width of the protrusion in the radial direction of the fixed rod decreases as the distance from the fixed rod increases, the baffle is rounded toward one end of the fixed rod, and a clamping member for clamping the overlapping area of ​​the support roll is provided on the support roll. The angle between the inner wall of the baffle and the side wall of the adjacent annular groove is less than or equal to 90°. Its function is that, through the design of the shape of the protrusion, the outer layer support roll can be directly rolled up from the outside to the inner layer support roll; through the setting of the shape of the baffle, it is convenient to make the surface area of ​​the baffle facing the outside of the annular groove larger than the surface area of ​​the baffle facing the inside of the annular groove, which is convenient for the baffle to be folded into the annular groove and at the same time can increase the difficulty of folding the baffle outward, so that the baffle can be folded into the annular groove when it is located between the inner layer and the outer layer of the support roll, and can also play a limiting role on the active clamping part and the driven clamping part; through the setting of the clamping member, the two adjacent layers of the support roll can be kept in close contact, so that each layer of the support roll can be synchronously and evenly expanded or contracted.

[0012] Furthermore, a clamping protrusion is provided at the bottom end of the clamping member contacting the support roll, and clamping ring grooves for the clamping protrusion to be embedded in are provided on the inner and outer sides of the support roll. Its function is that the clamping member can be fixed by the arrangement of the clamping protrusion and the clamping ring groove to prevent the clamping member from falling off the support roll.

[0013] Furthermore, a detection slot for placing a detection mechanism is provided at the bottom of the support roll, and the detection mechanism includes a plurality of detectors densely distributed in the detection slot, and when the support roll is unfolded and laid flat, the distance between every two adjacent detectors is the same. The detector can be a pressure sensor, an ultrasonic sensor, an optical camera, an optical fiber sensing system, an electromagnetic sensor, or other commonly used borehole detectors in the prior art. Its function is to design the distribution spacing of the detectors so that the arc length between every two adjacent detectors is the same after the support roll is expanded or contracted, thereby ensuring that the detection mechanism can maintain a high detection accuracy.

[0014] Furthermore, the detection slot is connected to a wire groove for passing the wire connected to the detector, and the fixed rod and the sleeve are provided with wire holes for passing the wire. The bottom surface of the sleeve is provided with a sealing plate for closing the bottom surface of the sleeve, the bottom opening of the wire hole is arranged on the axis of the fixed rod, and the top opening of the wire hole is arranged on the top surface or side wall of the fixed rod according to the connection position of the telescopic device and the fixed rod. Its function is that through the setting of the wire hole, the wires of each detector can be gathered.

[0015] In a second aspect, a method for using a bored pile borehole finder with an adaptive curvature is applied to the above-mentioned bored pile borehole finder with an adaptive curvature, comprising the following steps: Step S1, connecting the connection end to the support roll so that there is an inner and outer overlapping area between the support rolls; Step S2, rotating the sleeve to make the swing rod drive the support coil to expand or contract, so that the outer diameter of the support coil is 3-20 mm smaller than the outer diameter of the top of the drill hole; Step S3, connecting the fixing rod to the telescopic device, and gradually lowering the borer into the borehole.

[0016] The present invention has the beneficial effects: 1. Through the arrangement of the support roll and the sleeve, when the sleeve is rotated, the support roll can be expanded or contracted following the opening or closing of the swing rod. Due to the characteristics of the shape and structure of the support roll itself, when the support roll is expanded or contracted, the curvature of the outer wall of the support roll can change evenly with the change of the outer diameter of the support roll, and the outer wall of the support roll can always maintain a profile extremely close to a perfect circle. The thinner the support roll, the closer the outer profile of the support roll is to a perfect circle, the smaller the gap between the support roll and the borehole, and the more accurately the detection mechanism at the bottom of the support roll detects the inner wall of the borehole; 2. By setting the telescopic rod, the movement of the support roll along the axial direction of the fixed rod can be restricted, so that when the swing rod swings on the sleeve, the support roll can only expand or contract along the radial direction of the fixed rod, and will not be driven by the swing rod to move up and down, affecting the expansion or contraction effect of the support roll; 3. By setting the annular groove, the active embedded part and the passive embedded part, when the outer wall of the support roll expands or contracts, the active embedded part and the passive embedded part can move in the annular groove, so that the inner wall of the support roll can expand or contract synchronously with the outer wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the three-dimensional structure of Example 1; Figure 2 is a schematic cross-sectional structural diagram of Example 1; Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle; Figure 4 is a schematic diagram of the three-dimensional structure of Example 2; Figure 5 It is a cross-sectional structural schematic diagram of Example 2; Figure 6 for Figure 5 A schematic diagram of the enlarged structure at B in the middle; Figure 7 for Figure 5 Schematic diagram of the enlarged structure of output C.

[0018] Figure numerals: 1. fixed rod; 2. sleeve; 3. swing rod; 4. connecting end; 5. supporting roll; 7. telescopic rod; 8. annular groove; 801. active annular groove; 802. driven annular groove; 9. active embedded part; 10. driven embedded part; 11. baffle; 12. protrusion; 13. limiting part; 14. clamping member; 15. clamping protrusion; 16. clamping annular groove; 17. detection groove; 18. detector; 19. wire groove; 20. wire hole; 21. locking bolt. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0020] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0021] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed", "opened", "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] Example 1 In the first aspect, a bored pile hole finder with adaptive curvature is provided. Figure 1As shown, it includes a fixed rod 1 for connecting with the telescopic device and a sleeve 2 threadedly connected to the outside of the fixed rod 1. The sleeve 2 is evenly provided with at least three swing rods 3 in a ring shape. The swing rods 3 are hinged to the sleeve 2. The end of the swing rod 3 away from the sleeve 2 is hinged with a connecting end 4. The connecting end 4 is connected to a support roll 5 arranged around the sleeve 2. A detection mechanism is provided at the bottom of the support roll 5. The support roll 5 is in the shape of a profile. The support roll 5 can be made of a plastic material with slight elastic deformation, that is, a material that can make the outer contour of the support roll 5 approximately cylindrical when the support roll 5 is rolled up, such as rubber, aluminum roll, etc. The outer wall of the bottom of the support roll 5 is made of elastic material. When it touches an obstacle, the deformation of the outer wall of the support roll 5 can be transmitted to the detection mechanism, and it can be restored after passing the obstacle. The locking bolt 21 arranged along the radial direction of the sleeve 2 is threadedly connected to the section of the side wall of the sleeve 2 where no thread is provided. The friction between the locking bolt 21 and the fixing rod 1 is increased by squeezing the fixing rod 1 by the locking bolt 21. After the sleeve 2 is rotated to the desired position, the locking bolt 21 is tightened to further improve the fixing of the position of the sleeve 2. Its function is that, through the arrangement of the support roll 5 and the sleeve 2, the support roll 5 can expand or contract following the expansion or retraction of the swing rod 3 when the sleeve 2 is rotated. Due to the characteristics of the shape and structure of the support roll 5 itself, when the support roll 5 expands or contracts, the curvature of the outer wall of the support roll 5 can change evenly with the change of the outer diameter of the support roll 5, and the outer wall of the support roll 5 can always maintain a profile extremely close to a perfect circle. The thinner the support roll 5 is, the closer the outer profile of the support roll 5 is to a perfect circle, the smaller the gap between the support roll 5 and the borehole is, and the more accurate the detection mechanism at the bottom of the support roll 5 is for the inner wall of the borehole.

[0023] Specifically, Figure 2 As shown, at least three telescopic rods 7 are evenly distributed in a ring shape outside the fixed rod 1, and one end of the telescopic rod 7 away from the fixed rod 1 is connected to the support roll 5. The telescopic rod 7 is fixedly connected to the fixed rod 1. The telescopic rod 7 includes an inner rod and an outer rod sleeved outside the inner rod, the outer rod is fixedly connected to the fixed rod 1, and the inner rod is connected to the support roll 5. Its function is to limit the axial movement of the support roll 5 along the fixed rod 1 through the setting of the telescopic rod 7, so that when the swing rod 3 swings on the sleeve 2, the support roll 5 can only expand or contract along the radial direction of the fixed rod 1, and will not be driven by the swing rod 3 to move up and down, affecting the expansion or contraction effect of the support roll 5.

[0024] Specifically, Figure 2As shown, the wall surface of the support roll 5 facing the fixed rod 1 is provided with an annular groove 8, the connecting end 4 is provided with an active embedding portion 9 for embedding into the annular groove 8, the end of the telescopic rod 7 away from the fixed rod 1 is provided with a driven embedding portion 10, the annular groove 8 includes an active annular groove 801 and a driven annular groove 802, the active embedding portion 9 is located in the active annular groove 801, the driven embedding portion 10 is located in the driven embedding portion 10, and the upper and lower ends of the annular groove 8 facing the fixed rod 1 are provided with baffles 11 for preventing the active embedding portion 9 or the driven embedding portion 10 from falling off from the annular groove 8 along the radial direction of the fixed rod 1. Its function is that, through the arrangement of the annular groove 8, the active embedding portion 9 and the driven embedding portion 10, when the outer wall of the support roll 5 expands or contracts, the active embedding portion 9 and the driven embedding portion 10 can move in the annular groove 8, so that the inner wall of the support roll 5 can expand or contract synchronously with the outer wall.

[0025] Specifically, Figure 1 As shown, the support roll 5 has an area where the inner and outer layers overlap, and a protrusion 12 for embedding into the annular groove 8 is provided on the wall surface of the support roll 5 facing away from the fixing rod 1. A sealing plug having the same shape and size as the annular groove 8 is provided on the end surface of the innermost annular groove 8 of the support roll 5 to prevent the active embedding portion 9 or the driven embedding portion 10 from detaching from the end surface of the annular groove 8. Its function is that, by designing the support roll 5 with an area where the inner and outer layers overlap, the support roll 5 can have space to expand outward while maintaining the continuity of the outer wall contour, and avoid the formation of gaps between the outer walls when the support roll 5 expands.

[0026] Specifically, Figure 3 As shown, the protrusion 12 includes a limiting portion 13 for contacting the inner wall of the baffle 11. Its function is that, through the setting of the limiting portion 13, in the overlapping area of ​​the support roll 5, the limiting portion 13 on the outer wall of the inner support roll 5 can be stuck in the annular groove 8 on the inner wall of the outer support roll 5, even if the limiting portion 13 can only enter the annular groove 8 from the end of the annular groove 8, the effect of fixing the two adjacent layers of the support roll 5 is achieved, so that each layer of the support roll 5 can be synchronously and evenly expanded or contracted.

[0027] Specifically, Figure 3 As shown, the bottom of the support roll 5 is provided with a detection slot 17 for placing the detection mechanism, and the detection mechanism includes a plurality of detectors 18 densely distributed in the detection slot 17. When the support roll 5 is unfolded and laid flat, the detection slot 17 runs through the front and rear ends of the support roll 5, and the distance between every two adjacent detectors 18 is the same. The detector 18 adopts a pressure sensor. Its function is that, through the design of the distribution spacing of the detector 18, the arc length between every two adjacent detectors 18 can be the same after the support roll 5 expands or contracts, thereby ensuring that the detection mechanism can maintain a high detection accuracy.

[0028] Specifically, Figure 3As shown, the detection slot 17 is connected to a wire groove 19 for the wire connected to the detector 18 to pass through, and the fixed rod 1 and the sleeve 2 are both provided with a wire hole 20 for the wire to pass through. The bottom surface of the sleeve 2 is provided with a sealing plate for closing the bottom surface of the sleeve 2, the bottom opening of the wire hole 20 is arranged on the axis of the fixed rod 1, and the top opening of the wire hole 20 is arranged on the top surface or side wall of the fixed rod 1 according to the connection position of the telescopic device and the fixed rod 1. Its function is that through the setting of the wire hole 20, the wires of each detector 18 can be gathered.

[0029] In a second aspect, a method for using a bored pile borehole finder with an adaptive curvature is applied to the above-mentioned bored pile borehole finder with an adaptive curvature, comprising the following steps: Step S1, connecting the connection end 4 to the support roll 5 so that there is an inner and outer overlapping area between the support rolls 5; Step S2, the sleeve 2 is rotated around the fixed rod 1, so that the swing rod 3 drives the support coil 5 to expand or contract, so that the outer diameter of the support coil 5 is 3-20 mm smaller than the outer diameter of the top of the drill hole; Step S3, connecting the fixing rod 1 to the telescopic device, and gradually lowering the borer into the borehole.

[0030] The following steps are also included: Step S1a, embed the active embedding portion 9 on the connecting end 4 into the active annular groove 801 from the end of the active annular groove 801, and embed the passive embedding portion 10 on the telescopic rod 7 into the passive annular groove 802 from the end of the passive annular groove 802, so as to complete the connection between the connecting end 4 and the supporting roll 5 and the connection between the telescopic rod 7 and the supporting roll 5; Step S1b, after the active embedding portion 9 is embedded into the active annular groove 801 and the driven embedding portion 10 is embedded into the driven annular groove 802 and the support roll 5 is wound around once, the raised portion 12 of the inner support roll 5 is inserted into the annular groove 8 of the outer support roll 5, so that the limiting portion 13 and the baffle 11 are in contact with the side wall of the baffle 11 facing the annular groove 8, and the connection between the inner support roll 5 and the outer support roll 5 is completed; Step S3a, the detection mechanism also includes a data interface connected to all wires through a connector. After the fixed rod 1 is connected to the telescopic device, the data interface is connected to the computer to form an Internet of Things sensing and recognition system, so that when the bore finder is in use, the computer can display the signal transmitted by the detector 18 in real time, which is convenient for the use of the bore finder. The computer can determine the type of obstacle according to the collision length or the number of collision points of the collision detection ring formed by the fixed column.

[0031] The working principle of this embodiment is described as follows: after the overall installation of the borescope is completed, the height of the hinge between the swing rod 3 and the sleeve 2 is greater than the height of the hinge between the swing rod 3 and the connecting end 4, the fixed rod 1 is fixed, and the sleeve 2 is rotated to make the sleeve 2 rotate around the fixed rod 1.

[0032] When the sleeve 2 is moved downward along the axial direction of the fixed rod 1, the distance between the projection of the hinge between the swing rod 3 and the sleeve 2 on the rotating shaft of the fixed rod 1 and the projection of the telescopic rod 7 on the rotating shaft of the fixed rod 1 increases. Since the support roll 5 is fixed by the telescopic rod 7 and cannot be driven downward by the swing rod 3, the swing rod 3 pushes the support roll 5 outward, so that the inner diameter and outer diameter of the support roll 5 are expanded synchronously. During the expansion of the inner wall of the support roll 5, the baffle 11 on the driven annular groove 802 on the inner wall of the support roll 5 drives the telescopic rod 7 to extend, thereby completing the overall expansion of the borescope.

[0033] When the sleeve 2 is moved axially upward along the fixed rod 1, the distance between the projection of the hinge between the swing rod 3 and the sleeve 2 on the rotating shaft of the fixed rod 1 and the projection of the telescopic rod 7 on the rotating shaft of the fixed rod 1 decreases. Since the support roll 5 is fixed by the telescopic rod 7 and cannot be driven upward by the swing rod 3, the swing rod 3 pulls the support roll 5 inward, so that the inner diameter and outer diameter of the support roll 5 are synchronously reduced. During the process of contraction of the inner wall of the support roll 5, the driven annular groove 802 on the inner wall of the support roll 5 pushes the telescopic rod 7 to shorten, thereby completing the overall contraction of the borescope.

[0034] In the process of lowering the borehole finder to the depth of the borehole, if the support roll 5 is located in the area of ​​the outer wall of the detection groove 17 and touches an obstacle, the obstacle causes the outer wall of the detection groove 17 at that location to be concave inward, thereby triggering the detector 18 at that location. The detector 18 transmits the hit signal to the computer. By counting the distribution positions of the hit detectors 18, the distribution of obstacles in the borehole can be determined.

[0035] Example 2 In the first aspect, a bored pile hole finder with adaptive curvature is provided. Figure 4As shown, it includes a fixed rod 1 for connecting with the telescopic device and a sleeve 2 threadedly connected to the outside of the fixed rod 1. The sleeve 2 is evenly provided with at least three swing rods 3 in a ring shape. The swing rods 3 are hinged to the sleeve 2. The end of the swing rod 3 away from the sleeve 2 is hinged with a connecting end 4. The connecting end 4 is connected to a support roll 5 arranged around the sleeve 2. A detection mechanism is provided at the bottom of the support roll 5. The support roll 5 is in the shape of a profile. The support roll 5 can be made of a plastic material with slight elastic deformation, that is, a material that can make the outer contour of the support roll 5 approximately cylindrical when the support roll 5 is rolled up, such as rubber, aluminum roll, etc. The outer wall of the bottom of the support roll 5 is made of elastic material. When it touches an obstacle, the deformation of the outer wall of the support roll 5 can be transmitted to the detection mechanism, and it can be restored after passing the obstacle. Its function is that, through the arrangement of the support roll 5 and the sleeve 2, when the sleeve 2 is rotated, the support roll 5 can expand or contract following the opening or retracting of the swing rod 3. Due to the characteristics of the shape and structure of the support roll 5 itself, when the support roll 5 expands or contracts, the curvature of the outer wall of the support roll 5 can change evenly with the change of the outer diameter of the support roll 5, and the outer wall of the support roll 5 can always maintain a contour that is extremely close to a perfect circle. The thinner the support roll 5 is, the closer the outer contour of the support roll 5 is to a perfect circle, the smaller the gap between the support roll 5 and the borehole, and the more accurately the detection mechanism at the bottom of the support roll 5 can detect the inner wall of the borehole.

[0036] Specifically, Figure 5 As shown, at least three telescopic rods 7 are evenly distributed in a ring shape outside the fixed rod 1, and one end of the telescopic rod 7 away from the fixed rod 1 is connected to the support roll 5. The telescopic rod 7 is fixedly connected to the fixed rod 1. The telescopic rod 7 includes an inner rod and an outer rod sleeved outside the inner rod, the outer rod is fixedly connected to the fixed rod 1, and the inner rod is connected to the support roll 5. Its function is to limit the axial movement of the support roll 5 along the fixed rod 1 through the setting of the telescopic rod 7, so that when the swing rod 3 swings on the sleeve 2, the support roll 5 can only expand or contract along the radial direction of the fixed rod 1, and will not be driven by the swing rod 3 to move up and down, affecting the expansion or contraction effect of the support roll 5.

[0037] Specifically, Figure 5As shown, the wall surface of the support roll 5 facing the fixed rod 1 is provided with an annular groove 8, the connecting end 4 is provided with an active embedding portion 9 for embedding into the annular groove 8, the end of the telescopic rod 7 away from the fixed rod 1 is provided with a driven embedding portion 10, and the upper and lower ends of the annular groove 8 facing the fixed rod 1 are provided with baffles 11 for preventing the connecting end 4 from falling off from the annular groove 8 along the radial direction of the fixed rod 1, and the annular groove 8 includes an active annular groove 801 and a driven annular groove 802, the active embedding portion 9 is located in the active annular groove 801, and the driven embedding portion 10 is located in the driven embedding portion 10. Its function is that, through the arrangement of the annular groove 8, the active embedding portion 9 and the driven embedding portion 10, when the outer wall of the support roll 5 expands or contracts, the active embedding portion 9 and the driven embedding portion 10 can move in the annular groove 8, so that the inner wall of the support roll 5 can expand or contract synchronously with the outer wall.

[0038] Specifically, Figure 4 As shown, the support roll 5 has an area where the inner and outer layers overlap, and a protrusion 12 for embedding into the annular groove 8 is provided on the wall surface of the support roll 5 facing away from the fixing rod 1. A sealing plug having the same shape and size as the annular groove 8 is provided on the end surface of the innermost annular groove 8 of the support roll 5 to prevent the active embedding portion 9 or the driven embedding portion 10 from detaching from the end surface of the annular groove 8. Its function is that, by designing the support roll 5 with an area where the inner and outer layers overlap, the support roll 5 can have space to expand outward while maintaining the continuity of the outer wall contour, and avoid the formation of gaps between the outer walls when the support roll 5 expands.

[0039] Specifically, Figure 6 As shown, the width of the protrusion 12 in the radial direction of the fixing rod 1 decreases as the distance from the fixing rod 1 increases, the baffle 11 is rounded toward one end of the fixing rod 1, and a clamping member 14 for clamping the overlapping area of ​​the supporting roll 5 is provided on the supporting roll 5. The angle between the inner wall of the baffle 11 and the side wall of the adjacent annular groove 8 is less than or equal to 90°. Its function is that, through the design of the shape of the protrusion 12, the outer support roll 5 can be directly rolled up from the outside and close to the inner support roll 5; through the setting of the shape of the baffle 11, it is convenient to make the surface area of ​​the baffle 11 facing the outside of the annular groove 8 larger than the surface area of ​​the baffle 11 facing the inside of the annular groove 8, which is convenient for the baffle 11 to fold into the annular groove 8 and can increase the difficulty of folding the baffle 11 outward, so that the baffle 11 can be folded and stored in the annular groove 8 when it is located between the inner and outer layers of the support roll 5, and can also play a limiting role on the active clamping part and the driven clamping part; through the setting of the clamping member 14, the two adjacent layers of the support roll 5 can be kept in close contact, so that the layers of the support roll 5 can expand or contract synchronously and evenly.

[0040] Specifically, Figure 7As shown, the bottom end of the clamping member 14 in contact with the support roll 5 is provided with a clamping protrusion 15, and the inner and outer sides of the support roll 5 are provided with a clamping annular groove 16 for the clamping protrusion 15 to be inserted. Its function is that, through the arrangement of the clamping protrusion 15 and the clamping annular groove 16, the clamping member 14 can be fixed to prevent the clamping member 14 from falling off from the support roll 5.

[0041] Specifically, Figure 6 As shown, the bottom of the support roll 5 is provided with a detection slot 17 for placing the detection mechanism, and the detection mechanism includes a plurality of detectors 18 densely distributed in the detection slot 17. When the support roll 5 is unfolded and laid flat, the detection slot 17 runs through the front and rear ends of the support roll 5, and the distance between every two adjacent detectors 18 is the same. Its function is that, through the design of the distribution spacing of the detectors 18, the arc length between every two adjacent detectors 18 can be the same after the support roll 5 is expanded or contracted, thereby ensuring that the detection mechanism can maintain a high detection accuracy.

[0042] Specifically, Figure 6 As shown, the detection slot 17 is connected to a wire groove 19 for the wire connected to the detector 18 to pass through, and the fixed rod 1 and the sleeve 2 are both provided with a wire hole 20 for the wire to pass through. The bottom surface of the sleeve 2 is provided with a sealing plate for closing the bottom surface of the sleeve 2, the bottom opening of the wire hole 20 is arranged on the axis of the fixed rod 1, and the top opening of the wire hole 20 is arranged on the top surface or side wall of the fixed rod 1 according to the connection position of the telescopic device and the fixed rod 1. Its function is that through the setting of the wire hole 20, the wires of each detector 18 can be gathered.

[0043] In a second aspect, a method for using a bored pile borehole finder with an adaptive curvature is applied to the above-mentioned bored pile borehole finder with an adaptive curvature, comprising the following steps: Step S1, connecting the connection end 4 to the support roll 5 so that there is an inner and outer overlapping area between the support rolls 5; Step S2, the sleeve 2 is rotated around the fixed rod 1, so that the swing rod 3 drives the support coil 5 to expand or contract, so that the outer diameter of the support coil 5 is 3-20 mm smaller than the outer diameter of the top of the drill hole; Step S3, connecting the fixing rod 1 to the telescopic device, and gradually lowering the borer into the borehole.

[0044] The following steps are also included: Step S1a, embed the active embedding portion 9 on the connecting end 4 into the active annular groove 801 from the end of the active annular groove 801, and embed the passive embedding portion 10 on the telescopic rod 7 into the passive annular groove 802 from the end of the passive annular groove 802, so as to complete the connection between the connecting end 4 and the supporting roll 5 and the connection between the telescopic rod 7 and the supporting roll 5; Step S1c, after the active embedding portion 9 is embedded into the active annular groove 801 and the driven embedding portion 10 is embedded into the driven annular groove 802 and the support roll 5 is wound around once, the protrusion 12 of the inner support roll 5 is inserted into the annular groove 8 of the outer support roll 5, so that the protrusion 12 of the inner support roll 5 presses the baffle 11 of the outer support roll 5 into the annular groove 8 of the outer support roll 5, and then the clamping member 14 clamps the inner and outer surfaces of the support roll 5 from top to bottom, so that the clamping protrusion 15 extends into the clamping annular groove 16, and the connection between the inner support roll 5 and the outer support roll 5 is completed; Step S3a, the detection mechanism also includes a data interface connected to all wires through a connector. After the fixed rod 1 is connected to the telescopic device, the data interface is connected to the computer to form an Internet of Things sensing and recognition system, so that when the bore finder is in use, the computer can display the signal transmitted by the detector 18 in real time, which is convenient for the use of the bore finder. The computer can determine the type of obstacle according to the collision length or the number of collision points of the collision detection ring formed by the fixed column.

[0045] The remaining principles are the same as those in Example 1.

[0046] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. According to the technical essence of the present invention, within the spirit and principles of the present invention, any simple modification, equivalent replacement and improvement made to the above embodiment still falls within the protection scope of the technical solution of the present invention.

Claims

1. A bored pile hole finder with adaptive curvature, characterized in that: The invention comprises a fixed rod (1) for connecting with a telescopic device and a sleeve (2) threadedly connected to the outside of the fixed rod (1); at least three swing rods (3) are evenly arranged in a ring shape outside the sleeve (2); the swing rods (3) are hinged to the sleeve (2); a connecting end (4) is hinged to one end of the swing rod (3) away from the sleeve (2); the connecting end (4) is connected to a supporting roll (5) arranged around the sleeve (2); and a detection mechanism is provided at the bottom of the supporting roll (5).

2. The self-adaptive arc bored pile probe according to claim 1, characterized in that: At least three telescopic rods (7) are evenly distributed in a ring shape outside the fixed rod (1), and one end of the telescopic rod (7) away from the fixed rod (1) is connected to the support coil (5).

3. The self-adaptive arc bored pile probe according to claim 2, characterized in that: An annular groove (8) is provided on the wall surface of the support roll (5) facing the fixed rod (1), an active embedding portion (9) for embedding into the annular groove (8) is provided on the connecting end (4), a driven embedding portion (10) is provided at one end of the telescopic rod (7) away from the fixed rod (1), the annular groove (8) comprises an active annular groove (801) and a driven annular groove (802), the active embedding portion (9) is located in the active annular groove (801), and the driven embedding portion (10) is located in the driven embedding portion (10), and baffles (11) are provided at the upper and lower ends of the annular groove (8) facing the fixed rod (1) to prevent the active embedding portion (9) or the driven embedding portion (10) from falling out of the annular groove (8) along the radial direction of the fixed rod (1).

4. The self-adaptive arc bored pile probe according to claim 3, characterized in that: The support roll (5) has an area where the inner and outer layers overlap, and a protrusion (12) for embedding into the annular groove (8) is provided on the wall surface of the support roll (5) facing away from the fixing rod (1).

5. The self-adaptive arc bored pile probe according to claim 4, characterized in that: The protruding portion (12) comprises a limiting portion (13) for contacting the inner wall of the baffle (11).

6. The self-adaptive arc bored pile probe according to claim 4, characterized in that: The width of the protrusion (12) in the radial direction of the fixed rod (1) decreases as the distance from the fixed rod (1) increases, the baffle (11) is rounded at one end facing the fixed rod (1), and a clamping piece (14) for clamping the overlapping area of ​​the support roll (5) is provided on the support roll (5).

7. The self-adaptive arc bored pile probe according to claim 6, characterized in that: A clamping protrusion (15) is provided at the bottom end of the clamping member (14) in contact with the support roll (5), and clamping annular grooves (16) for the clamping protrusion (15) to be embedded are provided on the inner and outer sides of the support roll (5).

8. The self-adaptive arc bored pile probe according to claim 1, characterized in that: The bottom of the support roll (5) is provided with a detection slot (17) for accommodating a detection mechanism, the detection mechanism comprising a plurality of detectors (18) densely distributed in the detection slot (17), and when the support roll (5) is unfolded and laid flat, the distance between every two adjacent detectors (18) is the same.

9. The self-adaptive arc bored pile probe according to claim 8, characterized in that: The detection groove (17) is connected to a wire groove (19) for allowing a wire connected to the detector (18) to pass through, and the fixing rod (1) and the sleeve (2) are both provided with a wire hole (20) for allowing the wire to pass through.

10. A method for using a bored pile hole finder with an adaptive curvature, characterized in that: The bored pile hole finder with adaptive curvature used in any one of claims 1 to 9 comprises the following steps: Step S1, connecting the connection end (4) to the support roll (5) so that there is an inner and outer overlapping area between the support rolls (5); Step S2, causing the sleeve (2) to rotate around the fixed rod (1), so that the swing rod (3) drives the support coil (5) to expand or contract, so that the outer diameter of the support coil (5) is 3-20 mm smaller than the outer diameter of the top of the drill hole; Step S3, connect the fixed rod (1) to the telescopic device, and gradually lower the borer into the borehole.

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