A ranging device and casing following rotary drilling hole forming process

Abstract

The application provides a ranging device and a casing following rotary drilling hole forming process, and relates to the technical field of ranging equipment. The ranging device comprises a central distance setting mechanism, a support box, a telescopic sleeve and a positioning pipe. The central distance setting mechanism comprises an insertion shaft and a connecting shaft. The top of the connecting shaft penetrates through the support box and is connected with a protractor. A synchronous part is installed in the support box. The synchronous part comprises a synchronous belt, a synchronous slider and two synchronous wheels. The ranging sensor is used to measure the distance between the central axis of the connecting shaft and the outer surface of the positioning pipe. The casing following rotary drilling hole forming process can continue drilling and hole forming until the preset hole depth is reached after the whole casing is installed. The technical scheme provided by the application provides the functions of fast distance setting and point setting for the installation of the calibration rod, and can ensure that the calibration rod maintains a vertical state when it is hammered into the ground, thereby avoiding the problems of deviation and inclination when the calibration rod is hammered.

Description

Technical Field

[0001] This invention relates to the field of ranging equipment technology, and in particular to a ranging device and a casing-following rotary drilling process. Background Technology

[0002] Before the rotary drilling of the casing, the distance measurement work for setting out the pile position is the basic step of the entire pile foundation construction. Accurate distance measurement can ensure that the center of the pile position matches the design coordinates and avoid adverse consequences caused by position deviation.

[0003] Traditional measurement methods typically employ the cross-pile method. First, a center stake is inserted along the borehole axis. The distance from the center stake to the calibration rod is determined using a measuring ruler, and then the calibration rod is inserted. This process is repeated for at least four calibration rods. After the casing is installed in the designated position, the offset of the casing after installation is measured using the four calibration rods.

[0004] When using a measuring ruler to measure the installation points of the calibration rods, it is necessary to measure the spacing of the calibration rods in four directions sequentially, and then install the four calibration rods in sequence. This requires four separate installation point measurements, which is inconvenient for quickly measuring the installation points of the calibration rods.

[0005] Therefore, it is necessary to provide a new ranging device to solve the above-mentioned technical problems. Summary of the Invention

[0006] This invention provides a ranging device that solves the technical problem of how to quickly measure the installation point of a calibration rod in the prior art.

[0007] To solve the above-mentioned technical problems, the present invention provides a ranging device, comprising:

[0008] A center-distance fixing mechanism includes a mounting shaft and a connecting shaft. The bottom of the connecting shaft is slidably inserted into the mounting shaft. A distance measuring sensor is embedded in the connecting shaft and is located above the mounting shaft.

[0009] A support box is provided, with the top of the connecting shaft passing through the support box and connected to the angle plate. The support box is rotatably connected to the connecting shaft. An indicator arrow is fixed on the top of the support box, pointing towards the scale surface of the angle plate. A sliding hole is provided on the support box. A synchronizing component is installed inside the support box. The synchronizing component includes a synchronizing belt, a synchronizing slider, and two synchronizing pulleys. The synchronizing pulleys are rotatably installed inside the support box. The synchronizing belt drives and connects the two synchronizing pulleys. One end of the synchronizing slider is fixedly connected to the synchronizing belt.

[0010] A telescopic sleeve, one end of which is fitted onto one end of the support box and the two are slidably connected, and the other end of the synchronous slider passes through the sliding hole and is fixedly connected to the telescopic sleeve;

[0011] A positioning tube is fixed at the other end of the telescopic sleeve, and the distance sensor is used to measure the distance from the central axis of the connecting shaft to the outer surface of the positioning tube.

[0012] The telescopic sleeve is provided in two parts, and the two telescopic sleeves are symmetrically installed at both ends of the support box; the number of sliding holes, telescopic sleeves, synchronous sliders and positioning tubes are equal, and the four are arranged in a one-to-one correspondence; the two synchronous sliders are distributed in opposite directions of movement of the synchronous belt.

[0013] Preferably, the synchronous pulley is a belt pulley, and the synchronous belt is a belt, which drives the two pulleys.

[0014] Preferably, the ranging device further includes a display, which is signal-connected to the ranging sensor and is used to display the measured distance during the operation of the ranging sensor.

[0015] Preferably, the display is a touch screen, and the touch screen is mounted on the telescopic sleeve.

[0016] Preferably, the bottom of the angle plate and the top of the connecting shaft are connected by a threaded connection, and a support ring is provided on the angle plate, which is located below the support box.

[0017] Preferably, the center positioning mechanism further includes an elastic element, which vertically and elastically connects the insertion shaft and the connecting shaft.

[0018] Preferably, a locking groove is provided on the connecting shaft, and a support block is fixedly provided inside the support box;

[0019] The ranging device further includes:

[0020] The first locking mechanism includes a first telescopic member and a movable pin. One end of the first telescopic member is fixed to the support box, and the other end of the first telescopic member is fixedly connected to one end of the movable pin. The other end of the movable pin is inserted into the locking groove.

[0021] The second locking mechanism includes a second telescopic member and a telescopic clamping block. The second telescopic member is installed inside the support box, and the telescopic clamping block is fixed to the telescopic part of the second telescopic member. The telescopic range of the telescopic clamping block is aligned with the support block, and the surface of the synchronous belt passes between the telescopic clamping block and the support block.

[0022] Preferably, the second telescopic component includes a transmission slide and a transmission shaft. The transmission slide is fixed on the movable pin, one end of the transmission shaft is inserted into the transmission curved hole of the transmission slide, and the other end of the transmission shaft is fixedly connected to the telescopic clamp.

[0023] The telescopic clamp is slidably installed inside the support box;

[0024] When the first telescopic component drives the movable pin to extend and retract, the movable pin simultaneously drives the transmission slide to move, and the transmission slide drives the telescopic clamp to extend and retract adaptively through the transmission shaft.

[0025] To solve the above-mentioned technical problems, the present invention also provides a casing-following rotary drilling process, comprising the following steps:

[0026] Step S1: Lay out the pile positions to determine the drilling points, and use the ranging device to install four calibration rods in sequence around the drilling points.

[0027] Step S2: Install the casing suspension device on the rotary drilling rig turntable, install the drilling tool below the drill rod, and drill to a preset depth along the drilling point;

[0028] Step S3: Remove the drill bit, connect a section of casing to the casing suspension device, transport the casing to the bottom of the hole, disconnect the casing suspension device from the casing, and the casing installation is complete;

[0029] Step S4: The drill bit is reinstalled below the drill rod, and drilling is performed again; after drilling is completed, the drill bit is removed, and another section of casing is connected using the casing suspension device. After the upper and lower sections of casing are connected in place, the casing is transported down into the drilling machine as a whole until the casing is fully installed.

[0030] Repeat the above steps in sequence. After the casing is installed, drilling can continue until the preset hole depth is reached. After each installation, the offset of the casing is verified by using the four calibration rods according to the preset calibration measurement method.

[0031] Compared with related technologies, the ranging device provided by the present invention has the following advantages:

[0032] First, hammer the insertion shaft into the centerline of the drill hole, so that the centerline of the insertion shaft, the centerline of the connecting shaft, and the centerline are on the same vertical line;

[0033] While maintaining the positioning tube within the measurement range of the ranging sensor, one of the positioning tubes is pulled, causing a telescopic sleeve to extend onto the support box. As the telescopic sleeve moves, it drives the synchronous belt to move via a synchronous slider. Simultaneously, the synchronous belt drives another synchronous slider to move in the opposite direction via two synchronous pulleys. The synchronous slider then drives the telescopic sleeve and the positioning tube to move in the opposite direction, so as to simultaneously determine the installation distance and position of the two positioning tubes.

[0034] While the positioning tube moves, the ranging sensor measures the distance between the positioning tube and the connecting shaft in real time, so as to quickly measure the distance between the positioning tube and the connecting shaft and finally determine the installation point of the positioning tube.

[0035] After the installation point is determined, the calibration rod passes through the positioning tube and is driven into the installation point. The positioning tube provides the calibration rod with the functions of quick distance and point positioning, and also ensures that the calibration rod remains vertical when it is hammered into the ground, avoiding the problem of deviation and tilting of the calibration rod during hammering. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0037] Figure 1 A three-dimensional diagram of a first embodiment of the ranging device provided by the present invention;

[0038] Figure 2 for Figure 1 The enlarged schematic diagram of part A shown below;

[0039] Figure 3 for Figure 1 The BB section view shown;

[0040] Figure 4 for Figure 3 The shown is a CC section view;

[0041] Figure 5 This is a schematic diagram of the installation principle of the ranging device provided by the present invention, wherein, Figure 5 Image (a) shows the state after the shaft hammer has been inserted into the ground. Figure 5 Image (b) shows the state of the positioning tube after it has been stretched. Figure 5 Image (c) shows the state of the calibration rod being inserted through the positioning tube. Figure 5Image (d) shows the state of the calibration rod after it has been inserted into the ground. Figure 5 Image (e) shows the state after the positioning tube is lifted and separated from the calibration rod;

[0042] Figure 6 A schematic diagram of the rotation principle of the ranging device provided by the present invention, wherein, Figure 6 (a) is a top view of calibration rods e1 and e2 in their installed state. Figure 6 (b) is a top view of the equipment during the rotation and adjustment process. Figure 6 (c) is a top view of the installation state of calibration rods e3 and e4;

[0043] Figure 7 This is a schematic diagram of the structure of a second embodiment of the ranging device provided by the present invention;

[0044] Figure 8 for Figure 7 The diagram shows the connection structure of the second locking mechanism, wherein... Figure 8 (a) is a top view of the connection structure of the second locking mechanism. Figure 8 (b) is Figure 8 (a) Enlarged view of a portion of the diagram;

[0045] Figure 9 This is a schematic diagram of the third embodiment of the ranging device provided by the present invention, wherein, Figure 9 (a) is a top view showing the connecting pin connection structure. Figure 9 (b) is Figure 9 (a) Enlarged view of a portion of the diagram;

[0046] Figure 10 for Figure 9 The top view of the synchronous gear frame connection structure shown in (b) is shown in the figure.

[0047] Figure 11 for Figure 9 A 3D diagram of the synchronous gear frame connection structure shown.

[0048] Figure 12 This is a schematic diagram of the mode switching principle of the ranging device provided by the present invention, wherein, Figure 12 (a) is a schematic diagram of the device in storage mode. Figure 12 (b) is a schematic diagram of the device in ranging mode. Figure 12 Image (c) is a schematic diagram of the device in rotation mode. Figure 12 Image (d) is a schematic diagram of the structure during the autonomous rotation of the connecting shaft. Figure 12 Image (e) is a schematic diagram of the structure after the connecting shaft has rotated completely autonomously. Figure 12 (f) is Figure 12 Top view of the synchronous gear frame in state (a). Figure 12 (g) is Figure 12 Top view of the synchronous gear frame in state (b). Figure 12 h is Figure 12 Top view of the synchronous gear frame in state (c). Figure 12 (i) is Figure 12 Top view of the synchronous gear frame in the middle (d) state. Figure 12 (j) is Figure 12 Top view of the synchronous gear frame in state (e).

[0049] Explanation of icon numbers:

[0050] 1. Centering distance mechanism; 11. Mounting shaft; 12. Connecting shaft; 13. Elastic element; 14. Distance sensor;

[0051] 2. Angle dial;

[0052] 3. Support box; 301. Sliding hole; 31. Indicator arrow; 32. Synchronizing component; 321. Synchronizing pulley; 322. Synchronizing belt; 323. Synchronizing slider;

[0053] 4. Telescopic sleeve;

[0054] 5. Positioning tube;

[0055] 6. Monitor;

[0056] 121. Locking groove; 122. Rotating groove;

[0057] 33. Support block;

[0058] 7. First locking mechanism; 71. First telescopic component; 72. Movable pin; 73. Synchronous gear frame;

[0059] 8. Second locking mechanism; 81. Second telescopic component; 82. Telescopic clamp; 811. Transmission slide; 812. Transmission shaft;

[0060] 9. Gear ring.

[0061] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0062] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0063] This invention provides a ranging device.

[0064] First embodiment.

[0065] Please refer to the following: Figures 1 to 4 In this invention, the ranging device includes:

[0066] A center-distance fixing mechanism 1 includes an insertion shaft 11 and a connecting shaft 12. The bottom of the connecting shaft 12 is slidably inserted into the insertion shaft 11. A distance measuring sensor 14 is embedded in the connecting shaft 12 and is located above the insertion shaft 11.

[0067] The support box 3 is connected to the angle disk 2 after the top of the connecting shaft 12 passes through the support box 3. The support box 3 is rotatably connected to the connecting shaft 12. An indicator arrow 31 is fixed on the top of the support box 3, and the indicator arrow 31 faces the scale surface of the angle disk 2. A sliding hole 301 is opened on the support box 3. A synchronizing component 32 is installed inside the support box 3. The synchronizing component 32 includes a synchronizing belt 322, a synchronizing slider 323 and two synchronizing pulleys 321. The synchronizing pulleys 321 are rotatably installed inside the support box 3. The synchronizing belt 322 drives and connects the two synchronizing pulleys 321. One end of the synchronizing slider 323 is fixedly connected to the synchronizing belt 322.

[0068] Telescopic sleeve 4, one end of which is fitted onto one end of the support box 3 and the two are slidably connected, and the other end of the synchronous slider 323 passes through the sliding hole 301 and is fixedly connected to the telescopic sleeve 4;

[0069] Positioning tube 5, which is fixed at the other end of the telescopic sleeve 4, and the distance sensor 14 is used to measure the distance from the central axis of the connecting shaft 12 to the outer surface of the positioning tube 5;

[0070] Two telescopic sleeves 4 are provided, and the two telescopic sleeves 4 are symmetrically installed at both ends of the support box 3; the number of sliding holes 301, telescopic sleeves 4, synchronous sliders 323 and positioning tubes 5 are equal, and the four are arranged in a one-to-one correspondence; the two synchronous sliders 323 are distributed in opposite directions of movement of the synchronous belt 322.

[0071] In this embodiment, the ranging sensor 14 can be an infrared distance sensor. The ranging principle of the infrared distance sensor is to measure the distance between the target object and the infrared ranging sensor by emitting infrared light and receiving the light signal reflected back from the target object.

[0072] The indicator arrow 31 is aligned with the angle disk 2. When the support box 3 rotates and adjusts around the connecting shaft 12, the support box 3 also drives the indicator arrow 31 to rotate around the angle disk 2, thereby facilitating the indication of the angle of rotation of the support box 3 relative to the connecting shaft 12.

[0073] Distance measurement principle:

[0074] Before testing, the positioning tube 5 is located within the detection range of the ranging sensor 14;

[0075] During measurement, the distance sensor 14 measures the distance between the positioning tube 5 and the centerline of the insertion shaft 11 in real time. After calculation, the distance between the positioning tube 5 and the centerline of the insertion shaft 11 is obtained, thereby accurately measuring the stretching distance of the positioning tube 5.

[0076] In this embodiment, the principle for measuring the axial distance between the connecting shaft 12 and the positioning tube 5 is as follows:

[0077] The first displayed data = measurement distance (the distance between the central axis of the connecting shaft 12 and the outer surface of the positioning tube 5, which is directly measured by the distance sensor 14) + radius of the positioning tube 5.

[0078] The telescopic sleeve 4 is connected to the synchronous belt 322 via the synchronous slider 323. The two synchronous sliders 323 are distributed in opposite directions of movement of the synchronous belt 322, so that when one telescopic sleeve 4 is stretched to the left relative to the support box 3, the other telescopic sleeve 4 is stretched to the right relative to the support box 3. This allows the two positioning tubes 5 to be stretched and adjusted synchronously, while maintaining equal spacing between the two positioning tubes 5 and the connecting shaft 12.

[0079] Distance measurement principle of the device:

[0080] First, hammer the insertion shaft 11 into the centerline of the drill hole, so that the centerline of the insertion shaft 11, the centerline of the connecting shaft 12, and the centerline of the drill hole are on the same vertical line;

[0081] While maintaining the positioning tube 5 within the measurement range of the ranging sensor 14, one of the positioning tubes 5 is pulled, causing the telescopic sleeve 4 to extend on the support box 3. As the telescopic sleeve 4 moves, it drives the synchronous belt 322 to move via a synchronous slider 323. While the synchronous belt 322 is driven by two synchronous pulleys 321, it also drives another synchronous slider 323 to move in the opposite direction. The synchronous slider 323 drives the telescopic sleeve 4 and the positioning tube 5 to move in the opposite direction, so as to simultaneously determine the installation distance and position of the two positioning tubes 5.

[0082] While the positioning tube 5 moves, the ranging sensor 14 measures the distance between the positioning tube 5 and the connecting shaft 12 in real time, so as to quickly measure the distance between the positioning tube 5 and the connecting shaft 12 and finally determine the installation point of the positioning tube 5.

[0083] After the installation point is determined, the calibration rod passes through the positioning tube 5 and is driven into the installation point. The positioning tube 5 provides the calibration rod with the functions of quick distance and point positioning, and also ensures that the calibration rod remains vertical when it is hammered into the ground, avoiding the problem of deviation and tilting of the calibration rod when it is hammered.

[0084] In this embodiment, the synchronous pulley 321 can be a belt pulley, and the synchronous belt 322 can be a belt, which drives the two pulleys.

[0085] Both of the synchronous sliders 323 are fixedly connected to the belt and are distributed in the reverse conveying direction of the belt, so as to synchronously control the stable extension and retraction adjustment of the two telescopic sleeves 4.

[0086] The ranging device also includes a display 6, which is signal-connected to the ranging sensor 14 and is used to display the measured distance when the ranging sensor 14 is running.

[0087] In one embodiment, the display 6 can be mounted on a remote control. It is handheld and portable, facilitating the reception and real-time display of measurement data from the ranging sensor 14.

[0088] Please refer to it again. Figure 1 In another embodiment, the display 6 can also be a touch screen, which is mounted on the telescopic sleeve 4 and is signal-connected to the ranging sensor 14.

[0089] The measured data is displayed on the monitor in real time, and the touch screen allows for both displaying and controlling the measurement data.

[0090] Please refer to the following: Figure 2 and Figure 3 The bottom of the angle disk 2 and the top of the connecting shaft 12 are connected by a threaded connection. A support ring is provided on the angle disk 2, and the support ring is located below the support box 3.

[0091] In this embodiment, the connecting shaft 12 may include two methods of hammering into the ground:

[0092] In the disassembled state, the connecting shaft 12 and the angle plate 2 are removed and separated. The support box 3 is removed from the connecting shaft 12. The connecting shaft 12 and the mounting shaft 11 can be used separately as a whole. After the bottom of the mounting shaft 11 faces the ground, the connecting shaft 12 can be hammered into the ground. Then the angle plate 2 is installed on the connecting shaft 12 for use.

[0093] In the assembled state, the connecting shaft 12 and the angle plate 2 are maintained in a connected state. The support box 3 is stably installed between the connecting shaft 12 and the angle plate 2. The bottom of the insertion shaft 11 is directly facing the ground. By hammering the angle plate 2, the angle plate 2 drives the connecting shaft 12 and the insertion shaft 11 to move down as a whole until the bottom of the insertion shaft 11 is hammered into the ground.

[0094] The connecting shaft 12 and the angle disk 2 are detachable, allowing the connecting shaft 12 and the mounting shaft 11 to be hammered separately to the center point of the drill hole. After installation, the support box 3 is fitted onto the top of the connecting shaft 12, and then the support box 3 is stably installed on the connecting shaft 12 with the angle disk 2, facilitating subsequent distance measurement.

[0095] The support ring on the connecting shaft 12, together with the angle plate 2, restricts the support box 3 in the middle, so that the support box 3 can be stably rotated and adjusted on the connecting shaft 12.

[0096] The distance measured by the ranging sensor 14 may include real-time distance and axial distance. The real-time distance is the actual distance between the objects measured by the ranging sensor 14, and the axial distance is the distance between the center axis of the connecting shaft 12 and the positioning tube 5.

[0097] The display 6 can display the distance between the positioning tube 5 and the axis of the connecting shaft 12 when the distance is adjusted, which is recorded as the first display data; it is used for the distance measurement of the positioning tube 5 before the calibration rod is installed.

[0098] It can also be used to display the distance between the centerline of the mounting shaft 11 and the actual measured object, which is recorded as the second display data; providing support for subsequent calibration after the casing is installed.

[0099] Please refer to it again. Figure 3 The center positioning mechanism 1 further includes an elastic element 13, which vertically and elastically connects the insertion shaft 11 and the connecting shaft 12.

[0100] The elastic element 13 is a spring structure, sleeved outside the connecting shaft 12 and connecting the insertion shaft 11 and the connecting shaft 12. Figure 3As shown, in the initial state, the elastic element 13 can maintain the connection shaft 12 stably contracted on the insertion shaft 11.

[0101] The elastic element 13 is used to maintain the stability of the connecting shaft 12 retracted within the insertion shaft 11; at the same time, it can maintain the stability of the positioning tube 5 close to the ground after the insertion shaft 11 is hammered into the ground.

[0102] The working principle of the ranging device provided in this embodiment is as follows:

[0103] Step A1, as follows Figure 5 In step (a), the insertion shaft 11 in the disassembled state can be hammered into the ground first, and the hammering point of the insertion shaft 11 is a preset axis point;

[0104] Step A2: Assemble the support box 3 onto the top of the connecting shaft 12, and then achieve rapid assembly of the equipment through the threaded connection between the angle plate 2 and the connecting shaft 12;

[0105] Step A3, in conjunction with reference Figure 5 Middle (a) to Figure 5 In step (b), the positioning tube 5 is kept aligned with the measuring range of the ranging sensor 14, and the positioning tube 5 is stretched. The display 6 displays the first display data when the positioning tube 5 is stretched in real time. By observing the first display data, it is determined whether the positioning tube 5 has reached the installation distance range between the calibration rod and the axis.

[0106] Step A4, in conjunction with reference Figure 5 (c) to Figure 5 (d) and Figure 6 In step (a), after determining the measurement distance of the positioning tube 5, the calibration rod e1 is passed through one of the positioning tubes 5 and hammered into the ground. At this time, the installation spacing of the positioning tubes 5 is locked by the calibration rod e1. Then, the calibration rod e2 is passed through the other positioning tube 5 and hammered into the ground.

[0107] Step A5, in conjunction with reference Figure 5 Middle (d) to Figure 5 In the middle (e), the support box 3 is pulled upwards, while the insertion shaft 11 remains fixed. The support box 3, through the two telescopic sleeves 4, synchronously drives the positioning tubes 5 on both sides to move upwards and out of the range of the calibration rods e1 and e2;

[0108] Step A6, in conjunction with reference Figure 6 Middle (a) to Figure 6 In the middle (c), the support box 3 is rotated so that the two positioning tubes 5 are rotated to the installation range of the other two calibration rods. During this process, the insertion shaft 11 is kept in contact with the ground so that the axis does not change.

[0109] Step A7, as follows Figure 6 In step (c), after the measurement distance of the positioning tube 5 is determined again by the display 6, the calibration rod e3 is passed through one of the positioning tubes 5 and hammered into the ground. At this time, the installation spacing of the positioning tubes 5 is locked by the calibration rod e3. Then the calibration rod e4 is passed through another positioning tube 5 and hammered into the ground.

[0110] Second embodiment.

[0111] Please refer to the following: Figure 7 and Figure 8 Based on the ranging device provided in the first embodiment of the present invention, the second embodiment of the present invention proposes another ranging device. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0112] Specifically, the difference in the ranging device provided in the second embodiment of the present invention is that a locking groove 121 is provided on the connecting shaft 12, and a support block 33 is fixedly provided inside the support box 3;

[0113] The ranging device further includes:

[0114] The first locking mechanism 7 includes a first telescopic member 71 and a movable pin 72. One end of the first telescopic member 71 is fixedly mounted on the support box 3, and the other end of the first telescopic member 71 is fixedly connected to one end of the movable pin 72. The other end of the movable pin 72 is inserted into the locking groove 121.

[0115] The second locking mechanism 8 includes a second telescopic member 81 and a telescopic clamping block 82. The second telescopic member 81 is installed inside the support box 3. The telescopic clamping block 82 is fixed in the telescopic part of the second telescopic member 81. The telescopic range of the telescopic clamping block 82 is aligned with the support block 33. The surface of the synchronous belt 322 passes between the telescopic clamping block 82 and the support block 33.

[0116] In this embodiment, the first telescopic member 71 can be an electric telescopic rod, used to independently drive the movable pin 72 to extend and retract;

[0117] The second telescopic component 81 can also be an electric telescopic rod, used to independently drive the telescopic clamp 82 to extend and retract.

[0118] In this embodiment, when the movable pin 72 is inserted into the locking groove 121, the positioning tube 5 is kept stably aligned with the measurement range of the ranging sensor 14.

[0119] The ranging device includes three operating modes:

[0120] In the storage mode, the movable pin 72 is inserted into the locking slot 121, preventing the support box 3 and the connecting shaft 12 from rotating relative to each other; the telescopic clamp 82 stably clamps the synchronous belt 322 onto the support block 33, preventing the telescopic sleeve 4 from extending or retracting relative to the support box 3, thus ensuring the overall stability of the device when it is folded up, and the telescopic sleeve 4 will not freely extend or retract relative to the support box 3;

[0121] In the ranging mode, the movable pin 72 is inserted into the locking groove 121 to keep the positioning tube 5 within the measuring range of the ranging sensor 14; the telescopic clamp 82 retracts and separates from the synchronous belt 322, and the synchronous belt 322 can slide freely on the support block 33, so that the telescopic sleeve 4 can freely extend and retract relative to the support box 3 to facilitate the measurement of the installation distance of the positioning tube 5 relative to the insertion shaft 11;

[0122] In rotation mode, the movable pin 72 disengages from the locking groove 121, allowing the positioning tube 5 after distance measurement to rotate and adjust relative to the connecting shaft 12; the telescopic clamp 82 stably clamps the synchronous belt 322 onto the support block 33, preventing the telescopic sleeve 4 from telescopically adjusting relative to the support box 3, maintaining the current measurement distance while facilitating the rotation and adjustment of the positioning tube 5 to another installation point.

[0123] Device mode adjustment principle:

[0124] Please refer to the following: Figure 7 and Figure 8 As shown, let's define it as follows: in the initial state, the device is in storage mode;

[0125] After the device is installed in the usage area, the second telescopic component 81 is activated first. The second telescopic component 81 drives the telescopic clamp 82 to retract, so that the telescopic clamp 82 separates from the synchronous belt 322. The device switches from storage mode to distance measurement mode. The distance measurement sensor 14 and the display 6 facilitate the distance measurement and confirmation of the installation point of the positioning tube 5.

[0126] Once the installation distance between the positioning tube 5 and the insertion shaft 11 is determined, the second telescopic component 81 is activated. The second telescopic component 81 controls the telescopic clamp 82 to abut against the synchronous belt 322, and the equipment returns to the storage mode. This facilitates the locking of the distance of the positioning tube 5 after measurement. Then, the two calibration rods are hammered vertically into the ground through the two positioning tubes 5 in sequence to provide stable support for the fixed-distance installation of the calibration rods.

[0127] After the two calibration rods are installed, the first telescopic component 71 is activated. The first telescopic component 71 drives the movable pin 72 to retract. The movable pin 72 completely disengages from the locking groove 121, allowing the device to switch from storage mode to rotation mode. While the positioning tube 5 maintains a fixed distance, the support box 3 is pulled upward. The support box 3 drives the telescopic sleeve 4 and the positioning tube 5 to move upward as a whole and disengage from the two calibration rods after installation. Then, the positioning tube 5 is manually rotated 90° and pressed down to reset, facilitating the installation of the other two calibration rods.

[0128] Before installing the other two calibration rods, reset the device from rotation mode to storage mode to ensure the stability of the positioning tube 5 when it is used as a positioning support for the calibration rods, and to prevent the positioning tube 5 from rotating or changing its distance. Then, insert the other two calibration rods into the range of the positioning tube 5 in sequence, and then pull the entire device upwards out of the ground and put it away.

[0129] This allows for sequential distance measurements at the four points of the calibration rod during installation, and the measured distances can be locked to prevent changes in the installation distance during rotation and adjustment.

[0130] The working principle of the ranging device provided in this embodiment:

[0131] Step B1: When storing the device, align the movable pin 72 with the locking groove 121 and activate the first telescopic member 71. The first telescopic member 71 drives the movable pin 72 to extend and insert it into the locking groove 121, thereby locking the support box 3 and the connecting shaft 12, so that the support box 3 cannot be rotated or adjusted relative to the connecting shaft 12.

[0132] Activate the second telescopic component 81, which drives the telescopic clamp 82 to extend. The telescopic clamp 82 extends and stably presses the synchronous belt 322 onto the support block 33, thereby locking the synchronous belt 322 and preventing the telescopic sleeve 4 from extending or retracting relative to the support box 3. This facilitates the storage of the equipment or the locking of the installation spacing of the positioning tube 5.

[0133] Step B2: When the positioning tube 5 needs to be extended or retracted, the second telescopic component 81 is activated. The second telescopic component 81 drives the telescopic clamp 82 to retract. When the telescopic clamp 82 retracts, it separates from the synchronous belt 322, thereby unlocking the synchronous belt 322 and facilitating the free extension and retraction adjustment of the positioning tube 5.

[0134] In step B3, when the positioning tube 5 needs to be rotated and adjusted, the telescopic clamp 82 is first extended by controlling the second telescopic member 81 to lock the synchronous belt 322, so that the positioning tube 5 is positioned at the current installation distance and cannot be stretched; then the movable pin 72 is retracted by controlling the first telescopic member 71, so that the movable pin 72 is completely disengaged from the range of the locking groove 121, which facilitates the rotational adjustment of the positioning tube 5 in the fixed distance state, so as to facilitate the installation of the calibration rod in different directions.

[0135] Third embodiment.

[0136] Please refer to the following: Figures 9 to 11 Based on the ranging device provided in the second embodiment of the present invention, the third embodiment of the present invention proposes another ranging device. The third embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the third embodiment will not affect the separate implementation of the first embodiment.

[0137] Specifically, the difference in the ranging device provided in the third embodiment of the present invention is that the second telescopic member 81 may not be an electric telescopic pole.

[0138] The second telescopic component 81 includes a transmission slide 811 and a transmission shaft 812. The transmission slide 811 is fixed on the movable pin 72. One end of the transmission shaft 812 is inserted into the transmission curved hole of the transmission slide 811, and the other end of the transmission shaft 812 is fixedly connected to the telescopic clamp 82.

[0139] The telescopic clamp 82 is slidably installed inside the support box 3;

[0140] When the first telescopic member 71 drives the movable pin 72 to extend and retract, the movable pin 72 simultaneously drives the transmission slide 811 to move, and the transmission slide 811 drives the telescopic clamp 82 to extend and retract adaptively through the transmission shaft 812.

[0141] The transmission slide 811 connects the telescopic clamp 82 to the movable pin 72 via the transmission shaft 812, which facilitates the simultaneous extension and retraction adjustment of the movable pin 72 and the adaptive extension and retraction adjustment of the telescopic clamp 82 through the cooperation of the transmission slide 811 and the transmission shaft 812.

[0142] In this embodiment, when the device is in storage mode, the movable pin 72 is inserted into the locking groove 121 on one hand, and the movable pin 72 maintains the contact between the telescopic clamp 82 and the synchronous belt 322 through the transmission slide 811 and the transmission shaft 812 on the other hand. In this mode, the device cannot be extended or rotated, which facilitates locking after storage or distance measurement.

[0143] When the device switches from storage mode to rotation mode, the movable pin 72 can control the transmission shaft 812 to retract adaptively via the transmission slide 811. The transmission shaft 812 drives the telescopic clamp 82 to retract and separate from the synchronous belt 322. In this mode, the device can be telescopically adjusted but cannot be rotated. This facilitates the stretching adjustment of the telescopic sleeve 4 and the positioning tube 5, thereby making it convenient to measure the stretching distance of the positioning tube 5.

[0144] When the device is fully adjusted to the rotation mode, the movable pin 72 can also control the adaptive extension of the transmission shaft 812 through the transmission slide 811. The transmission shaft 812 drives the telescopic clamp 82 to extend and clamp the synchronous belt 322 onto the support block 33. In this mode, the device cannot be telescopically adjusted but can be rotated. This facilitates the rotational switching of the positioning tube 5 after the distance is fixed.

[0145] This allows the device to adaptively switch to ranging mode during the process of switching from storage mode to rotation mode, facilitating the switching of the single-drive control device between different modes and thus enabling the positioning tube 5 to maintain its distance.

[0146] Please refer to the following: Figure 9 , Figure 10 and Figure 11 The connecting shaft 12 is also provided with a rotating groove 122, and the locking groove 121 is staggered with the rotating groove 122.

[0147] The first locking mechanism 7 further includes a synchronous gear frame 73, and the ranging device further includes a gear ring 9. The gear ring 9 is located in the rotating groove 122. Both the upper and lower ends of the gear ring 9 are fixedly connected to the connecting shaft 12. One end of the synchronous gear frame 73 is fixedly connected to the movable pin 72, and the other end of the synchronous gear frame 73 extends into the range of the rotating groove 122 and is correspondingly arranged with the gear ring 9.

[0148] When the movable pin 72 is unlocked, it also simultaneously drives the synchronous gear frame 73 to engage with the gear ring 9.

[0149] Please refer to it again. Figure 11 In this embodiment, the synchronous gear frame 73 is a rectangular frame structure, covering the outside of the gear ring 9, and has a missing tooth surface structure. The connecting shaft 12, the gear ring 9, and the rotating groove 122 are combined to form an "I-shaped" structure.

[0150] Please see Figure 12 In (a), when the device is in storage mode, the synchronous gear frame 73 is separated from the gear ring 9 and is not engaged, and the connecting shaft 12 cannot rotate relative to the support box 3;

[0151] Please see Figure 12 In (b), when the device is in ranging mode, the synchronous gear frame 73 is separated from the gear ring 9 and does not mesh, and the connecting shaft 12 cannot rotate relative to the support box 3;

[0152] Please see Figure 12 In the middle (c), when the device is in rotation mode, the synchronous gear frame 73 is separated from the gear ring 9 and is not engaged, and the connecting shaft 12 can be manually rotated relative to the support box 3;

[0153] Please refer to the combination Figure 12 (c) to Figure 12 In (e), while the device maintains the rotation mode, the synchronous gear frame 73 engages with the gear ring 9, and the synchronous gear frame 73 controls the gear ring 9 and the connecting shaft 12 to automatically rotate and adjust relative to the support box 3.

[0154] In this embodiment, the connecting shaft 12 includes two measurement modes:

[0155] In calibration mode, the connecting shaft 12 is used to measure the installation point of the calibration rod, which facilitates the rapid distance measurement and installation of the calibration rod;

[0156] In the verification mode, the connecting shaft 12 is used to measure the distance between the inner wall of the casing and the central axis of the connecting shaft 12, which facilitates the point verification after the casing is installed.

[0157] When the connecting shaft 12 is in verification mode:

[0158] The second display data = measurement distance (the distance between the central axis of the connecting shaft 12 and the inner wall of the casing, which is directly measured by the distance sensor 14).

[0159] Verification principle after casing installation:

[0160] After the protective sleeve is installed, the two positioning tubes 5 are respectively fitted onto the two corresponding calibration rods so that the central axis of the connecting shaft 12 is aligned with the original central axis. At the same time, the distance between the two positioning tubes 5 and the connecting shaft 12 is equal.

[0161] After installation, the first telescopic component 71 is activated. The first telescopic component 71 controls the retraction of the movable pin 72. The movable pin 72 drives the synchronous gear frame 73 to move to the left. During the leftward movement of the synchronous gear frame 73, it first maintains separation from the gear ring 9 and does not mesh. Therefore, the connecting shaft 12 cannot rotate independently at present.

[0162] After the movable pin 72 is completely disengaged from the locking groove 121, the movable pin 72 continues to move to the left. The movable pin 72 drives the synchronous gear frame 73 to engage with the gear ring 9. Then the synchronous gear frame 73 drives the gear ring 9 to rotate adaptively. The gear ring 9 drives the connecting shaft 12 to rotate adaptively relative to the support box 3. The maximum rotation angle is 360°.

[0163] When the connecting shaft 12 rotates, it synchronously drives the distance measuring sensor 14 to rotate. During the rotation of the distance measuring sensor 14, the distance between the inner wall of the casing and the original centerline is quickly measured and displayed, so that after the casing is installed, the deviation between the casing axis and the original centerline can be quickly verified by this device and the installed calibration rod to see if it is within the allowable range.

[0164] This allows the equipment to be used not only for installing the calibration rod before casing installation, but also for verifying the deviation of the centerline after casing installation.

[0165] The working principle of the ranging device provided in this embodiment is as follows:

[0166] In calibration mode:

[0167] Please refer to the following: Figure 12 (a) and Figure 12 In the middle (f), it can be defined that in the initial state, the device is in the storage mode, the movable pin 72 is inserted into the locking groove 121, and the telescopic clamp 82 stably abuts and locks the timing belt 322 onto the support block 33.

[0168] Step C1: When it is necessary to adjust the telescopic extension of the positioning tube 5, please refer to the following... Figure 12 Middle (a) to Figure 12 In step (b), the first telescopic component 71 is activated first. While the first telescopic component 71 drives the movable pin 72 to retract within the locking groove 121, the movable pin 72 drives the transmission shaft 812 to retract adaptively through the transmission slide 811. The transmission shaft 812 drives the telescopic clamp 82 to retract synchronously. The telescopic clamp 82 retracts and separates from the synchronous belt 322, thereby unlocking the synchronous belt 322. This allows the positioning tube 5 to be freely stretched and adjusted while maintaining the rotational locking between the support box 3 and the connecting shaft 12.

[0169] Step C2, after the installation spacing of the positioning tube 5 is stretched, please refer to... Figure 12 (b) to Figure 12In step (a), the first telescopic component 71 is activated again. While the first telescopic component 71 drives the movable pin 72 to extend within the locking groove 121, the transmission slide 811 drives the transmission shaft 812 to extend adaptively. The transmission shaft 812 drives the telescopic clamp 82 to extend synchronously. The telescopic clamp 82 clamps the synchronous belt 322 onto the support block 33, thereby locking the synchronous belt 322. This allows the calibration rod to be stably installed through the positioning tube 5 after the distance is fixed, preventing the positioning tube 5 from becoming loose during installation.

[0170] Step C3, when the positioning tube 5 needs to be rotated and adjusted after being positioned, please refer to the following: Figure 12 Middle (a) to Figure 12 (c) and Figure 12 Middle (f) to Figure 12 In the middle (h), the first telescopic member 71 is activated, and the first telescopic member 71 drives the movable pin 72 to retract and completely disengage from the range of the locking groove 121, so that the support box 3 and the connecting shaft 12 are rotated and unlocked, and the positioning tube 5 can be rotated and adjusted relative to the connecting shaft 12.

[0171] After the movable pin 72 retracts, the telescopic clamp 82 is controlled to abut and lock against the synchronous belt 322 by the transmission slide 811 and the transmission shaft 812, so that the positioning tube 5 is allowed to rotate while the installation spacing of the positioning tube 5 is locked.

[0172] During this period, the synchronous gear frame 73 and the gear ring 9 remain in a non-meshing state;

[0173] In verification mode:

[0174] For step D1, please refer to the following: Figure 12 Middle (a) to Figure 12 (b) and Figure 12 Middle (f) to Figure 12 In the middle (g), the first telescopic member 71 is used to control the device to adjust to the ranging mode, so that the positioning tube 5 can be freely stretched and adjusted relative to the connecting shaft 12;

[0175] Step D2: Insert the two positioning tubes 5 into the two corresponding calibration rods, insert the insertion shaft 11 and the connecting shaft 12 into the range of the protective tube, and align the measuring range of the distance sensor 14 with the inner wall of the protective tube.

[0176] For step D3, please refer to [link / reference]. Figure 12When it is necessary to measure the distance between the inner wall of the protective sleeve and the central axis of the connecting shaft 12, the first telescopic member 71 is activated. The first telescopic member 71 drives the movable pin 72 to retract, and the movable pin 72 completely disengages from the range of the locking groove 121, so that the support box 3 and the connecting shaft 12 are rotated to unlock.

[0177] After the movable pin 72 disengages from the locking groove 121, the movable pin 72 continues to drive the synchronous gear frame 73 to retract, and the synchronous gear frame 73 adaptively engages with the gear ring 9 while retracting.

[0178] As the synchronous gear 73 continues to retract, the gear ring 9 rotates adaptively. The gear ring 9 drives the distance sensor 14 to rotate at the original central axis through the connecting shaft 12, so as to measure the distance of the installed casing and realize automatic calibration after the casing is installed.

[0179] The present invention also provides a casing-following rotary drilling process for hole formation.

[0180] The casing-following rotary drilling process includes the following steps:

[0181] Step S1: Lay out the pile positions to determine the drilling points, and use the ranging device to install four calibration rods in sequence around the drilling points.

[0182] Step S2: Install the casing suspension device on the rotary drilling rig turntable, install the drilling tool below the drill rod, and ream the hole to a preset depth along the borehole location.

[0183] In this embodiment, the preset depth is 2.5m.

[0184] Step S3: Remove the drill bit, connect a section of casing to the casing suspension device, transport the casing to the bottom of the hole, disconnect the casing suspension device from the casing, and the casing installation is complete;

[0185] In this embodiment, the depth of the protective casing is 3m.

[0186] Step S4: The drill bit is reinstalled below the drill rod, and drilling is performed again; after drilling is completed, the drill bit is removed, and another section of casing is connected using the casing suspension device. After the upper and lower sections of casing are connected in place, the casing is transported down into the drilling machine as a whole until the casing is fully installed.

[0187] In this embodiment, the drilling depth can be 3m.

[0188] Repeat the above steps in sequence. After the casing is installed, drilling can continue until the preset hole depth is reached. After each installation, the offset of the casing is verified by using the four calibration rods according to the preset calibration measurement method.

[0189] In this embodiment, the rotary drilling rig's turntable is mounted on the drilling rig's lifting frame to control the rotation adjustment of the drill rod; the casing suspension device is fixedly mounted on the periphery of the rotary drilling rig's turntable and is arranged around the drill rod to provide support for the installation of the casing.

[0190] One end of the drill rod is hoisted onto the frame of the drilling rig by a traction device, and the other end of the drill rod passes through the rotary drilling rig and the two are slidably connected. In use, the rotary drilling rig can drive the drill rod to rotate.

[0191] The drill bit is detachably mounted on the bottom of the drill rod. When drilling is required, the drill rod and the drill bit are rotated and drilled by the rotary drilling rig.

[0192] When drilling with casing is required, the drill rod is retracted upward by the traction device and the drill bit is removed. Then the casing is installed on the casing suspension device, and the casing is rotated downward by the rotary drilling rig turntable.

[0193] In this embodiment, the preset calibration measurement method may include two types:

[0194] Method 1: Hold a measuring tape and measure the distance between the corresponding calibration rod and the protective sleeve along the line connecting the two corresponding calibration rods driven in simultaneously. Record the data of each measurement and compare it with the verification data.

[0195] Method 2: Hold the ranging device described herein and install the two positioning tubes 5 onto the two corresponding calibration rods so that the central axis of the connecting shaft 12 is on the same axis as the original axis. Then use the ranging sensor 14 to measure the distance between the original axis and the inner wall of the casing, record the data from multiple measurements, and compare and verify with the test data.

[0196] This technology is suitable for drilling holes in easily collapsible strata and for pile foundations using rotary drilling. Drilling can be completed using only the necessary standard construction equipment, requiring only the addition of a follow-up casing and suspension device. It has strong reusability; the construction process is highly efficient, construction costs are controllable, hole quality is guaranteed, and environmental pollution risks are manageable.

[0197] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made under the concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A ranging device, characterized by, The utility model provides a center distance measuring device, including: A center distance measuring device, including an installation shaft and a connecting shaft, the bottom of the connecting shaft is slidingly inserted into the installation shaft, a distance measuring sensor is embedded on the connecting shaft, and the distance measuring sensor is located above the installation shaft; A support box, the top of the connecting shaft penetrates through the support box and is connected with a protractor, the support box is rotationally connected with the connecting shaft, an indication arrow is fixedly arranged on the top of the support box, the indication arrow faces the scale surface of the protractor, a sliding hole is formed in the support box, a synchronous part is arranged in the support box, the synchronous part includes a synchronous belt, a synchronous sliding block and two synchronous wheels, the synchronous wheels are rotationally arranged in the support box, the synchronous belt is transmissionally connected with the two synchronous wheels, and one end of the synchronous sliding block is fixedly connected with the synchronous belt; A telescopic sleeve, one end of the telescopic sleeve is sleeved with one end of the support box and is slidingly connected with the support box, and the other end of the synchronous sliding block is fixedly connected with the telescopic sleeve after penetrating through the sliding hole; A positioning pipe, the positioning pipe is fixedly arranged on the other end of the telescopic sleeve, and the distance measuring sensor is used for measuring the distance between the central axis of the connecting shaft and the outer surface of the positioning pipe; Wherein, the telescopic sleeve is provided with two, the two telescopic sleeves are symmetrically arranged on the two ends of the support box; the number of the sliding hole, the telescopic sleeve, the synchronous sliding block and the positioning pipe is equal, and the four are one-to-one corresponding arrangement; the two synchronous sliding blocks are distributed in the opposite moving directions of the synchronous belt; A locking groove is formed in the connecting shaft, and a support block is fixedly arranged in the support box; The distance measuring device further includes: A first locking mechanism, the first locking mechanism includes a first telescopic part and a movable pin, one end of the first telescopic part is fixedly arranged on the support box, the other end of the first telescopic part is fixedly connected with one end of the movable pin, and the other end of the movable pin is inserted into the locking groove; A second locking mechanism, the second locking mechanism includes a second telescopic part and a telescopic clamp block, the second telescopic part is arranged in the support box, the telescopic clamp block is fixedly arranged on the telescopic part of the second telescopic part, the telescopic range of the telescopic clamp block is aligned with the support block, and the surface of the synchronous belt penetrates through the telescopic clamp block and the support block; The second telescopic part includes a transmission slide and a transmission shaft, the transmission slide is fixedly arranged on the movable pin, one end of the transmission shaft is inserted into the transmission curved hole of the transmission slide, and the other end of the transmission shaft is fixedly connected with the telescopic clamp block; The telescopic clamp block is slidingly arranged in the support box; When the first telescopic part drives the movable pin to adjust the telescopic adjustment, the movable pin synchronously drives the transmission slide to move, and the transmission slide drives the telescopic clamp block to adaptively telescope through the transmission shaft; The transmission slide connects the telescopic clamp block with the movable pin through the transmission shaft, so that the telescopic clamp block can be synchronously controlled to adaptively telescope while the movable pin is telescoped.

2. The ranging device of claim 1, wherein, The synchronous wheel is a belt pulley, and the synchronous belt is a belt.

3. The ranging device of claim 1, wherein, The distance measuring device further comprises a display connected with the distance measuring sensor, and the display is used to display the measured distance when the distance measuring sensor is running.

4. The ranging device of claim 3, wherein, The display is a touch screen, which is installed on the telescopic sleeve.

5. The ranging device of claim 4, wherein, The bottom of the angle disc is connected with the top of the connecting shaft by screwing, and a supporting ring is arranged on the angle disc and located below the supporting box.

6. The ranging device of claim 1, wherein, The central distance measuring mechanism further comprises an elastic member, which is vertically and elastically connected with the inserting shaft and the connecting shaft.

7. A casing following rotary drilling hole forming process, characterized in that, The method comprises the following steps: S1, pile site wire laying is performed to determine a drilling point, and four calibration rods are installed in sequence around the drilling point using the distance measuring device according to any one of claims 1-6; S2, a casing suspension device is installed on a rotary drilling disc, a drilling tool is installed below a drill rod, and the drill hole is drilled to a preset depth along the drilling point; S3, the drilling tool is removed, a section of casing is connected with the casing suspension device, the casing is conveyed to the bottom of the hole, the connection between the casing suspension device and the casing is released, and the installation of the casing is completed; S4, the drilling tool is installed again below the drill rod, and drilling is performed again; after drilling is completed, the drilling tool is removed, another section of casing is connected with the casing suspension device, and the two sections of casing are connected in place, and the casing is conveyed to drill down until the installation of the casing is completed; The above steps are sequentially cycled, after the installation of the casing is completed, subsequent drilling and hole forming can be continued until the preset hole depth is reached; wherein after each installation is completed, the offset amount of the casing is verified by four calibration rods according to a preset calibration measurement method. S1, pile site wire laying is performed to determine a drilling point, and four calibration rods are installed in sequence around the drilling point using the distance measuring device according to any one of claims 1-6; S2, a casing suspension device is installed on a rotary drilling disc, a drilling tool is installed below a drill rod, and the drill hole is drilled to a preset depth along the drilling point; S3, the drilling tool is removed, a section of casing is connected with the casing suspension device, the casing is conveyed to the bottom of the hole, the connection between the casing suspension device and the casing is released, and the installation of the casing is completed; S4, the drilling tool is installed again below the drill rod, and drilling is performed again; after drilling is completed, the drilling tool is removed, another section of casing is connected with the casing suspension device, and the two sections of casing are connected in place, and the casing is conveyed to drill down until the installation of the casing is completed; The above steps are sequentially cycled, after the installation of the casing is completed, subsequent drilling and hole forming can be continued until the preset hole depth is reached; wherein after each installation is completed, the offset amount of the casing is verified by four calibration rods according to a preset calibration measurement method.

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