Testing equipment capable of being used for pile bottom reaming and pile wall integrity and using method

Abstract

The invention discloses testing equipment capable of being used for pile bottom reaming and pile wall integrity and a using method, and belongs to the technical field of mechanical reaming and pile hole side wall detection.The testing equipment comprises a reaming device and a pile wall measuring device.The reaming device comprises a tool rest, a plurality of blades are evenly arranged in the circumferential direction of the tool rest, and the top of the tool rest is connected with a tool rest gear; a motor gear is arranged at the output end of the motor and meshed with the tool rest gear. A plurality of measuring guide grooves are evenly formed in the outer portion of the outer sleeve in the circumferential direction, and pile wall measuring devices are arranged in the measuring guide grooves. The pile wall measuring device comprises a spring rod, one end of the spring rod is rotationally connected with the top of the measuring guide groove, the other end of the spring rod is rotationally connected to a telescopic arm, one end of the telescopic arm is rotationally connected with the measuring guide groove, and the other end of the telescopic arm is rotationally provided with a roller. The pile wall detection device and the outer sleeve are combined into a whole, pile wall measurement is carried out when equipment is pulled out after reaming, the equipment does not need to be frequently replaced, and the risk of damage to a pile hole structure in the construction process is effectively reduced.

Description

Technical Field

[0001] This invention belongs to the field of mechanical hole enlargement and pile hole sidewall detection technology, specifically relating to a testing device that can be used for pile bottom hole enlargement and pile wall integrity testing. Background Technology

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] In modern engineering construction, the application of reamed piles is becoming increasingly widespread. However, existing reamed pile construction techniques still have significant limitations: the construction process requires specialized equipment to enlarge the bottom of the already formed pile hole. For example, existing technology discloses a reaming drill bit and reaming assembly, whose reaming device mainly uses bolts to fold and compress the reaming drill bit to enlarge it, and then rotates the drill bit to enlarge the hole.

[0004] However, the above solution has the following problems: after use, the drilling bit is retracted into the protective shell by the extrusion of the pile wall, which can easily cause damage to the pile wall; and the pile wall contour cannot be detected during the recovery process. The integrity of the pile wall needs to be detected by other external testing equipment, which requires frequent equipment replacement. This step-by-step operation mode not only reduces construction efficiency, but also poses a potential threat to the integrity of the pile hole structure. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a testing device for pile bottom reaming and pile wall integrity. It integrates the pile wall testing device with an outer sleeve, allowing direct pile wall measurement after reaming when the device is pulled out, eliminating the need for frequent equipment replacement. This effectively reduces the risk of damage to the pile hole structure during mechanical construction and significantly reduces energy consumption of the construction equipment. Installing the reaming device inside the outer sleeve saves space and significantly reduces the risk of damage to the pile wall during equipment descent. A first electric telescopic rod drives a push-pull rod to extend and reset the blade from the bottom of the tool holder, ensuring the blade is reset after reaming. Furthermore, it prevents the blade from spreading and damaging the inner wall of the pile hole or failing to reach the cutting position.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, a testing device for pile bottom hole enlargement and pile wall integrity is provided, including a hole enlargement device and a pile wall measuring device set at the bottom of an outer sleeve. The hole enlargement device is located inside the outer sleeve. The enlargement device includes a tool holder with several blades evenly arranged along the circumference of the tool holder. A tool holder gear is fixedly connected to the top of the tool holder. Above the tool holder gear, several motors are fixed inside the outer sleeve. A motor gear is fixedly set at the output end of the motors. The motor gear meshes with the tool holder gear. Several measuring guide grooves are evenly arranged around the circumference of the outer sleeve. A pile wall measuring device is installed inside the measuring guide groove. The pile wall measuring device includes a spring rod, one end of which is rotatably connected to the top of the measuring guide groove, and the other end is rotatably connected to the telescopic arm. One end of the telescopic arm is rotatably connected to the measuring guide groove, and the other end is rotatably equipped with a roller. An angle change sensor is installed on the side of the telescopic arm away from the outer sleeve. The telescopic arm is fixed inside the measuring guide groove by a buckle.

[0007] Preferably, the tool holder is frustum-shaped, with a plurality of tool slots evenly arranged along the circumference of the tool holder; a guide rod is provided at the bottom of the tool slot; a blade is provided in each tool slot; the blade includes a cutting edge and a cutting groove, and the guide rod is slidably connected through the cutting groove.

[0008] Preferably, the top of the blade is rotatably connected to a push-pull rod, and the point where the blade and the push-pull rod are rotatably connected and the point where the cutting groove and the guide rod are slidably connected are not on the same straight line. The push-pull rod passes through the tool holder gear and is connected to the push-pull frame, which is connected to the first electric telescopic rod. The first electric telescopic rod is supported and fixed inside the outer sleeve, and the output end of the first electric telescopic rod is connected to the push-pull rod frame through a connecting bearing. Push-pull holes corresponding to the number and position of the push-pull rods are evenly opened on the tool holder gear.

[0009] Preferably, the telescopic arm is equipped with a second electric telescopic rod, including an output shell and a motor shell. One end of the output shell is fitted inside the motor shell and is slidably connected to it. The other end of the output shell is rotatably connected to a roller, while the end of the motor shell away from the output end is rotatably connected to a measuring guide groove. On the side of the motor shell near the output shell, facing the pile wall, it is rotatably connected to a spring rod. The buckle is an electromagnet. On the side of the output shell facing the pile wall, above the roller, an angle change sensor is installed.

[0010] Preferably, the top of the outer sleeve is connected to a connecting rod, and a connector is provided at the top of the outer sleeve. Both ends of the connecting rod are provided with connectors. The inner and outer wall diameters, materials, and connector sizes of the outer sleeve and the connecting rod are the same. Several bolt holes are evenly arranged along the circumference of the outer wall of the connector. After aligning the bolt holes between the connectors, the bolts are passed through and the nuts are tightened to complete the connection between the outer sleeve and the connecting rod.

[0011] Preferably, a positioning component is provided between the connectors, including a plurality of positioning rods fixedly disposed on the inner wall of the connector at the lower end of the connecting rod, and a plurality of positioning holes evenly disposed on the inner wall of the connector at the top of the outer sleeve or the connecting rod.

[0012] Preferably, a plurality of grouting holes are provided inside the outer sleeve along the axial direction of the outer sleeve, and the plurality of grouting holes are evenly arranged along the circumference of the outer sleeve wall; the connecting rod is also evenly provided with grouting holes of corresponding position and quantity; the measuring guide groove is staggered with the grouting holes.

[0013] Preferably, it also includes a positioning clamping device set at the top of the pile hole. After the outer sleeve and the connecting rod pass through the positioning clamping device, when the hole enlarging device reaches the bottom of the pile hole, the connecting rod part outside the pile hole is fixed on the positioning clamping device. The positioning clamping device includes a fixing plate, a column frame is set on the fixing plate, and a positioning fixing hole is set at the center of both the fixing plate and the column frame. A clamping structure is set on the positioning fixing hole.

[0014] Secondly, a method for using the aforementioned testing equipment for pile bottom reaming and pile wall integrity is provided, as follows: S1. Install the positioning clamping device on the pile hole to be enlarged for inspection, and slowly lower the outer sleeve through the two positioning and fixing holes; when the length of the outer sleeve is insufficient, use the positioning clamping device to fix the outer sleeve; connect the outer sleeve and the connecting rod and continue to lower it; if the length cannot reach the bottom of the pile hole, continue to install the connecting rod in the above manner. S2. When the bottom of the outer sleeve reaches the bottom of the pile hole, use the positioning clamping device to lock the connecting rod and fix it in a fixed state. S3. Operate the first electric telescopic rod to push the blade out of the tool holder; start the motor to drive the tool holder gear to rotate the blade and cut the target soil, thereby realizing the hole enlargement operation; S4. Open the buckle. The telescopic arm will pop out at a constant speed under the tension of the spring rod. After the angle change sensor signal on the telescopic arm stabilizes, release the positioning clamping device and lift the connecting rod vertically. The angle change sensor will then collect the signal. S5. During the lifting process, when the excess connecting rod exceeds the positioning clamping device, clamp its lower connecting rod and then disassemble the excess connecting rod, and then continue to lift the remaining device; after the measurement is completed, retract the telescopic arm to its original position, and fully lift the outer sleeve out in the positioning clamping device before proceeding to the construction of the next pile hole.

[0015] Preferably, in step S3, after cutting, the grouting pipe is connected to the grouting hole to inject grout into the bottom of the pile hole; then the water pump outlet is set in the inner hole at the top of the connecting rod to pump the grout carrying sediment to the ground, thereby achieving a complete cleaning of the pile hole; after the hole is enlarged, the first electric telescopic rod is operated again to drive the push-pull rod to retract the blade into the rotating cutter holder.

[0016] Compared with the prior art, the advantages and positive effects of this invention are: This invention integrates the pile wall detection device with the outer sleeve into one unit. Pile wall measurements are performed when the device is pulled out after hole reaming, eliminating the need for frequent equipment replacement. This effectively reduces the risk of damage to the pile hole structure during mechanical construction and significantly reduces energy consumption of the construction equipment. Installing the reaming device inside the outer sleeve saves space and reduces the risk of damage to the pile wall during descent. The push-pull rod, driven by a first electric telescopic rod, extends and resets the blade from the bottom of the tool holder, ensuring the blade is returned to its original position after reaming. This prevents the blade from damaging the inner wall of the pile hole or failing to reach the cutting position. Grouting holes are pre-drilled on the outer sleeve and connecting rod, allowing cement slurry or wall-protecting mud to be injected after reaming, and also serving as a slag removal mechanism, ensuring a clean inner wall of the pile hole and providing favorable working conditions for subsequent construction processes. The precise coordination between the rotating tool holder and the blade allows the blade to withstand greater loads during rotation, thereby improving the stability and efficiency of the equipment. Attached Figure Description

[0017] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0018] Figure 1 This is a schematic diagram of the operation of the testing equipment in Embodiment 1 or 2 of the present invention; Figure 2 This is a schematic diagram of the outer sleeve of Embodiment 1 or 2 of the present invention; Figure 3 This is a schematic diagram of the hole-expanding device according to Embodiment 1 or 2 of the present invention; Figure 4 This is a schematic diagram of the tool holder and push-pull rod cooperation in Embodiment 1 or 2 of the present invention; Figure 5 This is a front view of the tool holder according to Embodiment 1 or 2 of the present invention; Figure 6 This is a top view of the outer sleeve of Embodiment 1 or 2 of the present invention; Figure 7 This is a schematic diagram of the connection between the outer sleeve and the connecting rod in Embodiment 1 or 2 of the present invention; Figure 8 This is a schematic diagram of the pile wall measuring device in Embodiment 1 or 2 of the present invention when it is open; Figure 9 This is a schematic diagram of the pile wall measuring device in Embodiment 1 or 2 of the present invention when it is not open; Figure 10 This is a schematic diagram of the positioning and clamping device of Embodiment 1 or 2 of the present invention; Figure 11 This is a schematic diagram of the clamping structure of Embodiment 1 or 2 of the present invention; In the picture: 1. Hole reaming device; 101. First electric telescopic rod support; 102. First electric telescopic rod; 103. Connecting bearing; 104. Push-pull rod bracket; 105. Push-pull rod; 106. Tool holder gear; 107. Blade; 1071. Cutting edge; 1072. Cutting groove; 108. Tool holder; 109. Tool groove; 1091. Guide rod; 1010. Motor; 1011. Motor gear; 1012. Coil; 10121. Main wire; 2. Outer sleeve; 201. Measuring guide groove; 202 1. Grouting hole; 203. Positioning hole; 204. Cable protection shell; 205. Outer sleeve connector; 3. Connecting rod; 31. Bolt hole; 32. Positioning rod; 33. Connecting rod connector; 4. Pile wall measuring device; 41. Spring rod; 42. Telescopic arm; 43. Roller; 44. Angle change sensor; 441. Sensor coil; 45. Buckle; 5. Positioning clamping device; 51. Fixing plate; 52. Column frame; 53. Clamping structure; 531. Clamping piece; 532. Clamping threaded rod. Detailed Implementation

[0019] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0020] The present invention will now be described in detail with reference to the accompanying drawings.

[0021] Example 1 This embodiment discloses a testing device that can be used for pile bottom hole enlargement and pile wall integrity testing, such as... Figure 1 , Figure 2 , Figure 10 As shown, the device includes a hole-expanding device 1, which is located at the bottom of an outer sleeve 2. The top of the outer sleeve 2 is connected to a connecting rod 3, and a pile wall measuring device 4 is also located at the bottom of the outer sleeve 2. It also includes a positioning clamping device 5 located at the top of the pile hole. After the outer sleeve 2 and the connecting rod 3 pass through the positioning clamping device 5, when the hole-expanding device 1 reaches the bottom of the pile hole, the portion of the connecting rod 3 outside the pile hole is fixed to the positioning clamping device 5. It can be understood that when the pile hole is deep and the length of the outer sleeve 2 is insufficient, a connecting rod 3 needs to be installed at the top of the outer sleeve 2; when the length of the outer sleeve 2 is sufficient, the portion of the outer sleeve 2 outside the pile hole is fixedly connected to the positioning clamping device 5. It should be noted that both the outer sleeve 2 and the connecting rod 3 are hollow tubular bodies.

[0022] like Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, the hole-expanding device 1 is disposed inside the outer sleeve 2, including a first electric telescopic rod support 101 fixed inside the outer sleeve 2. The center of the first electric telescopic rod support 101 is fixedly connected to the first electric telescopic rod 102. The output end of the first electric telescopic rod 102 is disposed facing the bottom opening of the outer sleeve 2. The output end of the first electric telescopic rod 102 is connected to the push-pull rod frame 104 through the connecting bearing 103. Several push-pull rods 105 are evenly connected on the side of the push-pull rod frame 104 away from the first electric telescopic rod 102. In this embodiment, the number of push-pull rods 105 is four.

[0023] like Figure 3 , Figure 4 , Figure 5 As shown, the push-pull rod 105 passes through the tool holder gear 106 and connects to the blade 107. Specifically, the tool holder gear 106 has push-pull holes evenly spaced, corresponding to the number and position of the push-pull rods 105. The push-pull rods 105 pass through the push-pull holes and connect to the blades 107. The blades 107 are slidably disposed within the tool grooves 109 of the tool holder 108. Figure 3 , Figure 4 , Figure 5 As shown, the tool holder 108 is frustum-shaped, with its top fixedly connected to the tool holder gear 106. The tool holder 108 has evenly distributed tool slots 109 on its circumference, corresponding to the number and positions of the push-pull rods 105. In this embodiment, the inner edge of the tool slot 109 is vertical, therefore the cross-section of the tool slot 109 is a right-angled trapezoid. A guide rod 1091 is provided at the bottom of the tool slot 109. Figure 4 , Figure 5 As shown, the blade 107 includes a cutting edge 1071 and a cutting groove 1072. A guide rod 1091 is slidably connected within the cutting groove 1072, and the top end of the blade 107 is rotatably connected to the push-pull rod 105. Figure 4 , Figure 5 As shown, the point where the blade is rotatably connected to the push-pull rod 105 and the point where the cutting groove 1072 is slidably connected to the guide rod 1091 are not on a straight line, thus creating a lever effect. That is, as the push-pull rod 105 moves downwards, the blade 107 is gradually pushed outwards from the cutting groove 109 of the tool holder 108, meaning the blade 107 extends from the bottom of the tool holder 108. Furthermore, after the blade 107 extends out of the tool holder 108, its movement is restricted by the cutting groove 109, allowing it to withstand a larger load when the tool holder 108 rotates, thereby improving the stability and working efficiency of the equipment.

[0024] The bottom surface of the blade 1071 is flat. The blade rotates under the drive of the blade holder, which can smooth the bottom surface of the pile and reduce the uneven distribution of sediment.

[0025] In this embodiment, the blade 107 extends from the bottom of the tool holder 108, that is, from the bottom of the outer sleeve 2 towards the inner wall of the pile hole, rather than unfolding relative to the tool holder 108. The advantage of this design is that if the blade 107 unfolds from the tool holder, when the inner diameter of the pile hole is smaller than the unfolded length of the blade, the blade needs to be tilted downwards to cut the inner wall of the pile hole until the blade is parallel to the bottom of the pile hole. This process would damage the inner wall of the pile hole, and the inner wall of the pile hole would also obstruct the unfolding of the blade, preventing it from reaching a state parallel to the bottom of the pile hole and thus failing to reach the cutting position.

[0026] like Figure 3 As shown, the tool holder gear 106 meshes with the motor gear 1011. Specifically, several motors 1010 are evenly arranged circumferentially on the inner wall of the outer sleeve 2. In this embodiment, there are three motors 1010. The motors 1010 are positioned above the tool holder gear 106, and their output ends are fixedly connected to the motor gear 1011. The motor gear 1011 meshes with the tool holder gear 106. When the motor 1010 starts, it drives the tool holder gear 106 to rotate, thereby driving the tool holder 108 to rotate, causing the blade 107 to cut the soil at the bottom of the pile. It can be understood that since the first electric telescopic rod 102 is connected to the push-pull rod frame 104 through the connecting bearing 103, when the tool holder 108 rotates, driving the push-pull rod 105 and the push-pull rod frame 104 to rotate, the first electric telescopic rod 102 will not rotate. Figure 3 , Figure 4 As shown, a stop is provided on the bottom outer periphery of the tool holder 108 between the tool grooves 109, and an annular guide rail is provided at the bottom of the outer sleeve. The bottom of the stop is slidably connected to the annular guide rail. When the tool holder 108 rotates, it drives the stop to rotate on the annular guide rail. The main purpose of setting the stop and the annular guide rail is that when the push rod pushes the blade downward, it will exert a pushing force on the tool holder. The tool holder transmits this force to the annular guide rail through the stop, preventing the tool holder from being pushed out of the outer sleeve.

[0027] It should be noted that the bottom of the blade holder 108 needs to extend beyond the bottom of the outer sleeve 2, that is, the blade 107 can extend smoothly from the bottom of the outer sleeve 2, and at the same time, the inner hole of the outer sleeve 2 can be connected to the outside through the bottom.

[0028] like Figure 6 , Figure 7As shown, several grouting holes 202 are arranged along the axis of the outer sleeve 2 inside the sleeve wall, and these grouting holes 202 are evenly distributed around the circumference of the sleeve wall. This design allows the hole-expanding device 1 to immediately inject cement slurry or wall-protecting mud into the bottom of the pile hole through the grouting holes 202 after completing the hole-expanding operation. It also serves to remove slag. With the rotation and cooperation of the cutter holder 108 and the blade 107, the sediment at the bottom of the pile hole can be tumbled and stirred. This improves construction efficiency, ensures the cleanliness of the pile hole, and provides quality assurance for subsequent construction procedures.

[0029] like Figure 7 As shown, an outer sleeve connector 205 is provided at the top of the outer sleeve 2, and connecting rod connectors 33 are provided at both ends of the connecting rod 3. It can be understood that the inner and outer wall diameters of the outer sleeve 2 and the connecting rod 3 are the same, the materials are the same, and the outer sleeve connector 205 and the connecting rod connector 33 are the same size. Figure 6 As shown, the connectors are all frustum-shaped; several bolt holes 31 are evenly arranged along the circumference of the outer wall of the connector. In this embodiment, four bolt holes 31 are provided. After aligning the bolt holes 31 between the two connectors, the bolts are passed through and the nuts are tightened to complete the connection between the outer sleeve 2 and the connecting rod 3.

[0030] like Figure 7 As shown, a positioning assembly is also provided between the connectors, including several positioning rods 32 fixedly installed on the inner wall of the connector at the lower end of the connecting rod 3. The positioning rods 32 are evenly arranged circumferentially along the inner wall of the connector at the lower end of the connecting rod 3. Correspondingly, several positioning holes 203 are evenly provided on the inner wall of the connector at the top of the outer sleeve 2 or the connecting rod 3. It can be understood that the number and position of the positioning holes 203 correspond to the positioning rods 32. The positioning rods and positioning holes can ensure the connection between the outer sleeve 2 and the connecting rod 3, improve the convenience and accuracy of assembling the connecting rod 3 and the outer sleeve 2, and make on-site installation more efficient and reliable.

[0031] It should be noted that the connecting rod 3 is also evenly provided with grouting holes 202 of corresponding positions and quantities. After the connecting rod 3 is connected to the outer sleeve 2, the grouting holes 202 are connected accordingly. To strengthen the connection, a rubber gasket is provided between the contact surfaces of the connecting rod 3 and the outer sleeve 2. It can be understood that the rubber gasket is also provided with a corresponding number and position of grouting holes and positioning holes.

[0032] In this embodiment, the motor 1010 is a waterproof motor, and the first electric telescopic rod is also a waterproof electric telescopic rod. It is understood that the connecting rod 3 is also equipped with a cable protection shell at the corresponding position.

[0033] Understandably, to effectively clean the pile hole, grouting fluid (cement slurry or wall-protecting mud) can be injected through the pre-reserved grouting hole on the connecting rod 3. Using the inner hole at the top of the connecting rod 3 as a conduit, a suction device (such as a water pump) is connected to the top of the connecting rod to suction out the sediment at the bottom, thus drawing the grouting fluid (cement slurry or wall-protecting mud) carrying the sediment to the ground, thereby achieving comprehensive cleaning of the pile hole. Specifically, after the grouting fluid is injected through the grouting hole, it forms a circulating flow within the pile hole, carrying the sediment deposited at the bottom of the hole to the hole opening for discharge.

[0034] like Figure 2 , Figure 8 , Figure 9 As shown, the bottom outer wall of the outer sleeve 2 is provided with a protrusion, the centerline of the protrusion is downward, and a number of measuring guide grooves 201 are provided along the circumference of the bottom outer wall of the outer sleeve 2. The measuring guide grooves 201 are staggered with the grouting holes 202. A pile wall measuring device 4 is provided in the measuring guide groove 201, and a number of pile wall measuring devices 4 are evenly arranged along the bottom outer wall of the outer sleeve 2.

[0035] Specifically, if Figure 8 , Figure 9 As shown, the pile wall measuring device 4 includes a spring rod 41. One end of the spring rod 41 is rotatably mounted on the top of the measuring guide groove 201, and the other end of the spring rod 41 is rotatably connected to a telescopic arm 42. One end of the telescopic arm 42 is rotatably connected to the inside of the measuring guide groove 201, and the other end of the telescopic arm 42 is rotatably connected to a roller 43. An angle change sensor 44 is provided on the outward-facing side of the telescopic arm 42 to detect the change in tilt of the telescopic arm during its ascent. In one embodiment, a high-precision tilt sensor HWT605 can be used. The telescopic arm 42 is fixed in the measuring guide groove 201 by buckles 45 on both sides.

[0036] Specifically, the spring rod 41 is equipped with a damping device, such as the damper in the gas spring of the prior art. When the spring rod 41 is in a stretched state, when the telescopic arm 42 loses its buckle constraint, the spring rod 41 will pull the telescopic arm 42 to unfold relative to the outer sleeve 2. Since the spring rod 41 is equipped with a damping device, the spring rod 41 is stretched evenly when pulling the telescopic arm 42, and the telescopic arm 42 will not pop out quickly, so as not to damage the inner wall of the pile hole due to excessive unfolding speed. In this embodiment, after the telescopic arm 42 extends outward under the action of the spring rod 41, the roller 43 will eventually contact the inner wall of the pile hole. When the entire device moves upward out of the pile hole, the roller 43 continues to contact the inner wall of the pile hole. Combined with the spring rod connected to the telescopic arm, the angle can be flexibly changed during the overall upward movement of the device, thereby minimizing damage to the inner wall of the pile hole and ensuring the safety and efficiency of the detection process. When the entire device moves upward, if there is a defect in the inner wall of the pile hole at a certain point, the movement of the roller 43 at the corresponding position will change compared to the movement of the roller 43 at other positions. At the same time, this change will be collected by the angle change sensor 44.

[0037] In this embodiment, a second electrically operated telescopic rod is provided inside the telescopic arm 42, such as... Figure 7 As shown, the device includes an output housing and a motor housing. One end of the output housing is fitted inside the motor housing and slidably connected to it. The second electric telescopic rod is housed within the motor housing and the output housing. Inside the output housing, the output end of the second electric telescopic rod is fixedly connected to the end of the output housing furthest from the motor housing. Inside the motor housing, the motor end of the second electric telescopic rod is fixedly connected to the end of the motor housing furthest from the output housing. When the second electric telescopic rod is in operation, it can drive the sliding movement between the motor housing and the output housing. The second electric telescopic rod is also a waterproof electric telescopic rod.

[0038] Externally, the output housing is rotatably connected to the roller 43 at the end away from the motor housing, while the motor housing is rotatably connected to the inside of the measuring guide groove 201 at the end away from the output end. On the motor housing near the output housing, in the direction facing the pile wall, it is rotatably connected to the spring rod 41. The initial state of the telescopic arm 42 is that the roller 43 is in contact with the bottom of the measuring guide groove 201. Buckles 45 are located on both sides of the motor housing; specifically, the buckles 45 are electromagnets. On the side of the output housing facing the pile wall, a sensor mounting slot is formed above the roller 43 for mounting an angle change sensor 44. It can be understood that the wires of the buckles 45, the angle change sensor 44, and the second electric telescopic rod inside the telescopic arm 42 are all located inside the output housing and the motor housing.

[0039] It should be noted that while the size of the outer sleeve is fixed, the diameter of the pile hole is not. The telescopic arm expands under the action of the spring rod to accommodate different pile diameters. More importantly, because the tool holder 108 extends from the bottom of the outer sleeve 2, and the initial state of the telescopic arm 42 is that the roller 43 is in contact with the bottom of the measuring guide groove 201, when the spring rod 41 drives the telescopic arm 42 to unfold, the roller 43 ultimately contacts the pile wall above the measuring guide groove 201, making it impossible to detect the position of the enlarged hole. Therefore, when the buckle 45 is de-energized, there is no constraint between the telescopic arm 42 and the measuring guide groove 201. When the spring rod 41 drives the telescopic arm 42 to unfold outward, the output end of the second electric telescopic rod inside the telescopic arm 42 extends, causing the telescopic arm 42 to slowly unfold outward while simultaneously moving the roller 43 downward to contact the position of the enlarged hole.

[0040] like Figure 3 , Figure 8 , Figure 9 As shown, the wires of the angle change sensor 44 pass through the wire pre-drilled hole on the measuring guide groove 201 and into the interior of the outer sleeve 2. Above the motor 1010, an electric coil 1012 is provided. The wires of the motor, the first electric telescopic rod, the buckle 45, and the second electric telescopic rod inside the telescopic arm 42 are all set on the electric coil 1012. There is also the sensor coil 441 of the angle change sensor 44, and the wires of the angle change sensor 44 are set on the sensor coil 441. Furthermore, the main wire 10121 of the electric coil 1012 and the wires of the sensor coil 441 pass through the wire pre-drilled hole of the outer sleeve 2 and enter the cable protection shell 204 to protect the cables and ensure that the cables do not interfere with each other.

[0041] like Figure 1 , Figure 10 As shown, the positioning and clamping device 5 includes a fixing plate 51, on which a column frame 52 is mounted. In this embodiment, the column frame 52 includes four L-shaped columns, one end of which is fixedly mounted on the four plates of the fixing plate 51, and the other end is connected together. Figure 10 As shown, a positioning and fixing hole is provided at the center of both the fixing plate 51 and the column frame 52. The diameter of the positioning and fixing hole is larger than the diameter of the outer sleeve 2 and the connecting rod 3, and is also larger than the diameter of the protrusion and the diameter of the connector.

[0042] The purpose of setting two positioning and fixing holes is to restrict the outer sleeve 2 or connecting rod 3 to be perpendicular to the fixing plate 51, so as to prevent the outer sleeve 2 or connecting rod 3 from shifting.

[0043] like Figure 10 , Figure 11As shown, a clamping structure 53 is provided on both positioning and fixing holes. The clamping structure 53 includes clamping members arranged opposite to each other. The clamping members are composed of arc-shaped clamping pieces 531 and clamping threaded rods 532. The clamping pieces 531 are connected to the clamping threaded rods 532 through rotating bearings. The two clamping pieces 531 are used to clamp the connecting rod 3 or the outer sleeve 2.

[0044] like Figure 10 As shown, the clamping structure 53 on the fixing plate 51 and the column frame 52 have the same clamping direction. Specifically, a clamping threaded hole is provided at the center of the opposite side of the fixing plate 51. The clamping threaded hole is connected to the positioning fixing hole. The clamping threaded hole is threadedly connected to the clamping threaded rod 532. A handle is provided at the end of the clamping threaded rod 532 away from the clamping piece 531. By turning the handle, the clamping threaded rod 532 is moved toward the positioning fixing hole, thereby moving the clamping piece 531 toward the positioning fixing hole. Since the clamping piece 531 is connected to the clamping threaded rod 532 through a rotating bearing, the clamping piece 531 will not rotate when the clamping threaded rod 532 rotates.

[0045] like Figure 10 As shown, the clamping structure 53 on the column frame 52 is provided above the clamping structure 53 on the fixing plate 51, and the corresponding L-shaped column is provided with clamping thread holes for installing the clamping structure 53.

[0046] It is understood that the outer sleeve 2 or connecting rod 3 of this application is lifted and placed into the pile hole by a hoisting device, and the hoisting device can be the hoisting and handling machinery in the prior art.

[0047] It should be noted that the motor inside the outer sleeve, the first electric telescopic rod, and the wires of the buckle wire and the second electric telescopic rod inside the telescopic arm 42 are respectively connected to their respective control switches on the ground for controlling start and stop; the wires on the ground are connected to the signal processing terminal. In this embodiment, a multi-channel displacement data acquisition instrument is used to receive signals from sensors of various angle changes.

[0048] Example 2 This embodiment discloses a method for using a testing device for pile bottom reaming and pile wall integrity, which utilizes a testing device for pile bottom reaming and pile wall integrity from Embodiment 1, as detailed below: S1. Install the positioning clamping device 5 on the pile hole to be enlarged for testing. Pass the outer sleeve 2 through the two positioning and fixing holes and slowly lower it into the pile hole. If the length of the outer sleeve 2 is insufficient, use the positioning clamping device 5 to fix the outer sleeve 2 first. Then place a rubber pad on the upper part of the outer sleeve 2, and then place the positioning rod on the connecting rod into the positioning hole on the outer sleeve. Use bolts to tighten the outer sleeve 2 and the connecting rod 3. After the outer sleeve 2 and the connecting rod 3 are connected as one unit, open the positioning clamping device 5 and then slowly lower the outer sleeve 2 and the connecting rod 3 into the pile hole. If the length cannot reach the bottom of the pile hole, continue to install the connecting rod 3 in the above manner.

[0049] S2. When the bottom of the outer sleeve 2 reaches the bottom of the pile hole, the positioning clamping device 5 is used to lock the connecting rod 3, so that it is in a fixed state, and provides a reaction force for the hole enlarging device 1 at the bottom of the outer sleeve. S3. Operate the first electric telescopic rod switch to push the blade to extend fully from the bottom of the tool holder; then start the three built-in motors to drive the tool holder gears to move, thereby driving the tool holder to rotate and making the blade rotate synchronously; the blade cuts the target soil during the rotation, thereby realizing the hole enlargement operation; Connect the grouting pipe to the grouting hole and inject grout into the bottom of the pile hole; then set the water pump inlet in the inner hole at the top of the connecting rod to pump the grout carrying the sediment to the ground, thereby achieving a complete cleaning of the pile hole. After the hole is enlarged, operate the first electric telescopic rod switch again to retract the blade into the rotating tool holder via the push-pull rod.

[0050] S4. Open the latch. The telescopic arm will pop out at a uniform speed under the tension of the spring rod, preventing damage to the pile wall due to excessive extension speed. At the same time, control the extension of the telescopic arm to make the roller contact the inner wall of the hole expansion area; wait for the angle change sensor signal on the telescopic arm to stabilize. Release the positioning clamping device 5, and at the same time, the lifting and handling machinery will vertically lift the connecting rod 3. The signal of the angle change sensor will be transmitted to the signal processing terminal located on the ground through the connected wire. During the process of the entire equipment being lifted, the signal processing terminal will detect and process the signal changes of the angle change sensors on the eight telescopic arms in real time. S5. During the upward movement of the connecting rod and the outer sleeve, when the excess connecting rod exceeds the positioning clamping device, clamp the lower part of the connecting rod, remove the excess connecting rod, and then continue to lift the remaining part of the device. After the measurement is completed, the telescopic arm is retracted to its original position, and the outer sleeve is fully lifted out in the positioning and clamping device before proceeding to the construction of the next pile hole.

[0051] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A testing device for pile bottom reaming and pile wall integrity, characterized in that, It includes a hole-expanding device and a pile wall measuring device set at the bottom of the outer sleeve. The hole-expanding device is located inside the outer sleeve. The expansion device includes a tool holder with several blades evenly arranged along the circumference of the tool holder. A tool holder gear is fixedly connected to the top of the tool holder. Above the tool holder gear, several motors are fixed inside the outer sleeve. A motor gear is fixedly installed at the output end of the motors. The motor gear meshes with the tool holder gear. Several measuring guide grooves are evenly arranged around the circumference of the outer sleeve. A pile wall measuring device is installed inside the measuring guide groove. The pile wall measuring device includes a spring rod, one end of which is rotatably connected to the top of the measuring guide groove, and the other end is rotatably connected to the telescopic arm. One end of the telescopic arm is rotatably connected to the measuring guide groove, and the other end is rotatably equipped with a roller. An angle change sensor is installed on the side of the telescopic arm away from the outer sleeve. The telescopic arm is fixed inside the measuring guide groove by a buckle.

2. The testing equipment for pile bottom reaming and pile wall integrity as described in claim 1, characterized in that, The tool holder is frustum-shaped with several tool slots evenly arranged around its circumference; a guide rod is provided at the bottom of the tool slot; a blade is provided in each tool slot; the blade includes a cutting edge and a cutting groove, and the guide rod is slidably connected through the cutting groove.

3. The testing equipment for pile bottom reaming and pile wall integrity as described in claim 1, characterized in that, The top of the blade is rotatably connected to a push-pull rod. The point where the blade and the push-pull rod are rotatably connected is not on the same straight line as the point where the cutting groove and the guide rod are slidably connected. The push-pull rod passes through the tool holder gear and is connected to the push-pull frame. The push-pull frame is connected to the first electric telescopic rod. The first electric telescopic rod is supported and fixed inside the outer sleeve. The output end of the first electric telescopic rod is connected to the push-pull rod frame through a connecting bearing. Push-pull holes are evenly opened on the tool holder gear, corresponding to the number and position of the push-pull rods.

4. The testing equipment for pile bottom reaming and pile wall integrity as described in claim 1, characterized in that, The telescopic arm is equipped with a second electric telescopic rod, including an output shell and a motor shell. One end of the output shell is fitted inside the motor shell and is slidably connected to it. The other end of the output shell is rotatably connected to a roller, while the end of the motor shell away from the output end is rotatably connected to a measuring guide groove. On the side of the motor shell near the output shell, facing the pile wall, it is rotatably connected to a spring rod. The buckle is made of an electromagnet. On the side of the output shell facing the pile wall, above the roller, an angle change sensor is installed.

5. The testing equipment for pile bottom reaming and pile wall integrity as described in claim 1, characterized in that, The top of the outer sleeve is connected to a connecting rod, and a connector is provided at the top of the outer sleeve. Connectors are provided at both ends of the connecting rod. The inner and outer wall diameters, materials, and connector sizes of the outer sleeve and the connecting rod are the same. Several bolt holes are evenly arranged along the circumference of the outer wall of the connector. After aligning the bolt holes between the connectors, the bolts are passed through and the nuts are tightened to complete the connection between the outer sleeve and the connecting rod.

6. The testing equipment for pile bottom reaming and pile wall integrity as described in claim 5, characterized in that, A positioning component is provided between the connectors, including a number of positioning rods fixedly installed on the inner wall of the connector at the lower end of the connecting rod, and a number of positioning holes evenly provided on the inner wall of the connector at the top of the outer sleeve or the connecting rod.

7. The testing equipment for pile bottom reaming and pile wall integrity as described in claim 5, characterized in that, Several grouting holes are arranged inside the outer sleeve along the axis of the outer sleeve, and the several grouting holes are evenly arranged along the circumference of the outer sleeve wall; the connecting rod is also evenly arranged with grouting holes of corresponding position and number; the measuring guide groove is staggered with the grouting holes.

8. The testing equipment for pile bottom reaming and pile wall integrity as described in claim 5, characterized in that, It also includes a positioning clamping device set at the top of the pile hole. After the outer sleeve and the connecting rod pass through the positioning clamping device, when the hole enlarging device reaches the bottom of the pile hole, the connecting rod part outside the pile hole is fixed on the positioning clamping device. The positioning clamping device includes a fixing plate, a column frame is set on the fixing plate, and a positioning fixing hole is set at the center of both the fixing plate and the column frame. A clamping structure is set on the positioning fixing hole.

9. A method of using the testing equipment for pile bottom reaming and pile wall integrity as described in any one of claims 1-8, characterized in that, Specifically as follows: S1. Install the positioning clamping device on the pile hole to be enlarged for inspection, and slowly lower the outer sleeve through the two positioning and fixing holes; when the length of the outer sleeve is insufficient, use the positioning clamping device to fix the outer sleeve; connect the outer sleeve and the connecting rod and continue to lower it; if the length cannot reach the bottom of the pile hole, continue to install the connecting rod in the above manner. S2. When the bottom of the outer sleeve reaches the bottom of the pile hole, use the positioning clamping device to lock the connecting rod and fix it in a fixed state. S3. Operate the first electric telescopic rod to push the blade out of the tool holder; start the motor to drive the tool holder gear to rotate the blade and cut the target soil, thereby realizing the hole enlargement operation; S4. Open the buckle. The telescopic arm will pop out at a constant speed under the tension of the spring rod. At the same time, control the extension of the telescopic arm so that the roller contacts the inner wall of the enlarged hole. After the angle change sensor signal on the telescopic arm stabilizes, release the positioning clamping device and lift the connecting rod vertically. The angle change sensor will collect the signal. S5. During the lifting process, when the excess connecting rod exceeds the positioning clamping device, clamp its lower connecting rod and then disassemble the excess connecting rod, and then continue to lift the remaining device; after the measurement is completed, retract the telescopic arm to its original position, and fully lift the outer sleeve out in the positioning clamping device before proceeding to the construction of the next pile hole.

10. The method of using the testing equipment for pile bottom reaming and pile wall integrity as described in claim 9, characterized in that, In step S3, after cutting, the grouting pipe is connected to the grouting hole to inject grout into the bottom of the pile hole; then the water pump is set in the inner hole at the top of the connecting rod to pump the grout carrying the sediment to the ground to achieve a complete cleaning of the pile hole; after the hole is enlarged, the first electric telescopic rod is operated again to drive the push-pull rod to retract the blade into the rotating tool holder.

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