Device and method for detecting pile-forming diameter of high-pressure jet grouting pile

Abstract

The invention discloses a pile-forming diameter detection device for a high-pressure jet grouting pile. The pile-forming diameter detection device comprises a drilling assembly, a cleaning assembly and a detection assembly. The drilling assembly comprises an inclined pipe jacking drilling machine and a steel sleeve, and the steel sleeve is obliquely drilled downwards from the ground through the inclined pipe jacking drilling machine, is drilled into the high-pressure jet grouting pile from a soil body and is drilled into the soil body on the other side through a pile core of the high-pressure jet grouting pile; the cleaning assembly is arranged in the steel sleeve and used for cleaning soil generated in the drilling process. The detection assembly is arranged in the steel sleeve and used for detecting the junction position of the boundary of the formed pile and the soil body, and the diameter of the formed pile is calculated according to the length, detected by the detection assembly, of the junction position of the two sides of the formed pile and the soil body and the inclination angle of the steel sleeve in the downward drilling process. The situation that the strength of the pile is seriously damaged due to the fact that a large number of holes are drilled in the pile in a traditional drilling and coring mode is avoided, the detection precision is improved while the strength of the high-pressure jet grouting pile is guaranteed, the detection method is improved, and the detection efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of geotechnical engineering, and more specifically, relates to a device and method for detecting the diameter of a high-pressure jet grouting pile. Background Art

[0002] High-pressure jet grouting is a foundation treatment technology, mainly used to reinforce weak soil layers, improve foundation bearing capacity and prevent groundwater seepage. It forms a consolidation body by spraying cement slurry or other chemical materials into the soil under high pressure, thereby enhancing the stability and strength of the foundation. It is mainly used in building foundation reinforcement, subway and tunnel engineering, bridge and highway construction, slope stabilization, water conservancy engineering and environmental restoration. In the process of subway tunnel excavation, in order to ensure the safety and stability of the tunnel wall, high-pressure jet grouting is often used to reinforce the surrounding soil and control ground settlement.

[0003] The technical principle of high-pressure rotary jet pile is to use an engineering drill to drill a hole (or a rotary jet machine) to the designed depth, then lower a grouting pipe with a horizontal nozzle to the designed elevation, and use high-pressure equipment to make the nozzle spray out the slurry at a certain pressure. The high-pressure jet impacts and cuts the soil. Under the strong dynamic pressure of the high-pressure jet, the soil is destroyed. The soil particles are peeled off from the stratum and mixed with cement slurry to form a mixed slurry. A part of the fine particles emerges from the ground with the mixed slurry, and the remaining soil particles are regularly rearranged according to a certain slurry-soil ratio and mass under the action of the impact force, centrifugal force, gravity and other forces of the jet. As the grouting pipe rotates and rises, a cylindrical pile body is formed. After solidification, a cylindrical solidification body with a certain strength and adjacent piles bite into one body is formed in the soil, which plays a role in water stopping and soil reinforcement.

[0004] After the high-pressure jet grouting pile is completed, the diameter of the pile needs to be tested. At present, the generally recognized effective method for testing the diameter of the high-pressure jet grouting pile is to use the method of drilling and coring, that is, vertical coring is performed at the position of the designed pile diameter. If the strength of the core sample meets the design requirements, the pile diameter is considered to meet the requirements. However, this method is a single-point measurement and cannot truly reflect the actual diameter of the high-pressure jet grouting pile. When reinforcing a large area of ​​deep foundations, during the process test stage, in order to measure the actual pile diameter, coring must be performed at different radii from the pile center to accurately find the pile diameter. However, due to the variability of the strata, the variability of the pile body strength, and the verticality control ability of the drilling equipment, the verticality of the drilling and coring is difficult to guarantee, and the final measured pile diameter may also have deviations.

[0005] There is a detection method currently on the market, which includes the following steps: 1) Before pile formation, several monitoring holes are drilled inside and outside the designed pile diameter edge line, and steel casing is buried; 2) A vibration sensor is placed on the steel casing, and the sensor is used to transmit the vibration amplitude signal; 3) When the high-pressure jet grouting pile starts to spray, the vibration amplitude of the vibration sensor is observed to predict the arrival of the spraying at the monitoring position. This detection method can quickly predict the pile diameter through the vibration sensor, and timely remedies can be made according to the detection results to ensure the construction quality. However, during the construction process of high-pressure rotary jet grouting piles, due to problems with the equipment itself and the diversity of soil layers, the vibration state at different times will be inconsistent, which will cause great interference to the accuracy of the detection. Therefore, a high-pressure rotary jet grouting pile diameter detection device and method are needed to meet the pile diameter measurement under various construction conditions. Summary of the invention

[0006] In view of the above defects or improvement needs of the prior art, the present invention provides a high-pressure jet grouting pile diameter detection device and method. The diameter of the high-pressure jet grouting pile can be calculated by detecting the length of the junction between the two sides of the high-pressure jet grouting pile and the soil body detected by the detection component, and then according to the inclination angle of the steel casing when drilling down, avoiding the traditional drilling and coring method of drilling a large number of holes in the pile column, which seriously damages its strength. While ensuring the strength of the high-pressure jet grouting pile, the detection accuracy is improved, the detection method is improved, and the detection efficiency is improved.

[0007] To achieve the above objectives, according to a first aspect of an embodiment of the present invention, there is provided a high-pressure jet grouting pile diameter detection device, comprising: a drilling component, a cleaning component and a detection component; The drilling assembly includes an inclined jacking drill and a steel casing, and the steel casing is drilled down from the ground at an angle by the inclined jacking drill, drilled from the soil into the high-pressure jet grouting pile, and drilled through the pile core of the high-pressure jet grouting pile to the soil on the other side; The cleaning assembly is arranged in the steel casing and is used to clean the mud generated during the drilling process; The detection component is arranged in the steel casing and is used to detect the position where the pile boundary and the soil meet. The diameter of the pile is calculated based on the length of the junction between the two sides of the pile and the soil detected by the detection component and the inclination angle of the steel casing when drilling.

[0008] Furthermore, the inclined jacking pipe drilling rig includes a frame for overall support, crawlers arranged on both sides of the frame, an adjustment frame arranged on the frame, a lifting jack arranged between the frame and the adjustment frame, a jacking jack arranged on the adjustment frame, and a pressure plate arranged at one end of the jacking jack.

[0009] Furthermore, side panels extending forward and backward are provided on both sides of the frame; The crawlers are arranged on the side plates on both sides of the frame, and the frame is driven to move to the working position by the crawlers.

[0010] Furthermore, a reinforcing plate is provided at the rear end of the adjustment frame, and a guide plate is provided at the front end, the reinforcing plate and the guide plate are connected via a guide rod, reinforcing ribs are further provided between the reinforcing plate and the guide rod, and a guide hole is provided on the guide rod; The guide rod of the adjustment frame is also provided with a slider, which slides on the guide rod; One end of the adjustment frame is rotatably connected to the front end of the frame, and the other end is connected to the rear end of the frame through a lifting jack. The angle between the adjustment frame and the high-pressure jet grouting pile is adjusted by pushing the lifting jack.

[0011] Furthermore, a rotary rod is provided at the rear end of the frame, and the bottom end of the lifting jack is connected to the frame through a rotating block, and the rotating block is sleeved on the rotary rod. When the lifting jack is pushed, the rotating block is used to meet the angle change caused by the rotation of the adjustment frame; The pressure plate is arranged on the slider of the adjustment frame, and is connected to the reinforcing plate through a jacking jack. A top corresponding to the position of the guide hole on the guide plate is arranged on the side of the pressure plate away from the jacking jack.

[0012] Furthermore, the cleaning assembly is arranged inside the steel casing and is divided into three interconnected sections: front, middle and rear sections; It includes high-pressure nozzles, slurry suction ports, slurry pumps, electronic warehouses, transmission pipelines, water supply pipes and slurry discharge pipes.

[0013] Furthermore, the high-pressure nozzle is arranged at the end of the front section, and is used to spray high-pressure water flow to punch and crush the original soil and pile body inside the steel casing, and mix them with water to form mud; The slurry extraction port is arranged on the side of the front section, and the mixed slurry is extracted from the steel casing through the slurry extraction port; The slurry pump is arranged inside the middle section and is used to provide power for pumping out slurry from the slurry pumping port; The electronic compartment is arranged inside the rear section, and components including batteries and low-frequency beacons are integrated therein.

[0014] Furthermore, the cleaning component is also provided with a transmission pipeline, in which a water supply pipe and a slurry discharge pipe are provided to provide a water source for the high-pressure nozzle and to transport the slurry extracted from the slurry extraction port to the ground for discharge; The water supply pipe is connected to a water supply bin arranged on the ground, and the slurry discharge pipe is connected to a slurry storage bin arranged on the ground.

[0015] According to a second aspect of an embodiment of the present invention, a method for detecting the diameter of a high-pressure jet grouting pile is provided, comprising the following steps: S100, determining the core coordinates of the high-pressure jet grouting pile to be tested according to the design parameters, using a total station to place points, and determining the angle between the steel casing and the high-pressure jet grouting pile according to the design height of the high-pressure jet grouting pile to be tested and the on-site topography; S200, determining the position of the steel casing into the soil according to the determined angle and the pile core coordinates, and placing points by a total station to confirm the position and direction of the inclined pipe jacking drilling rig; S300, drive the inclined pipe jacking drill rig to the position, adjust the direction, and fix anchor rods at the four corners of the inclined pipe jacking drill rig to keep the inclined pipe jacking drill rig in its original position; S400, start the lifting jack to make the angle between the adjustment frame and the high-pressure jet grouting pile the same as the angle between the steel casing and the high-pressure jet grouting pile, and use the jacking jack to press the steel casing into the soil at a determined angle and completely penetrate the high-pressure jet grouting pile; S500, using a controller to control the camera to turn on, and observe the hole wall of the inclined borehole until the camera observes the intersection points between the two sides of the high-pressure jet grouting pile and the soil; S600, calculating the distance between the intersection points of the two sides of the high-pressure jet grouting pile and the soil, and then calculating the diameter of the high-pressure jet grouting pile according to the distance and the angle between the steel casing and the high-pressure jet grouting pile; S700, pull out and dismantle the steel casing, transmission pipeline, water supply pipe and slurry discharge pipe in turn, complete the inspection work, and move the inclined jacking drill rig to the next point for inspection.

[0016] Furthermore, step S400 specifically includes the following steps: S401, fix a single section of steel casing to the top of the pressing plate, place a cleaning assembly inside the steel casing, start the jacking jack, and press the steel casing into the soil at a determined angle; S402, start the high-pressure nozzle and the slurry pump, so that the soil inside the steel casing is broken by the high-pressure water and mixed with the soil to form mud, which is discharged into the slurry storage bin through the slurry pumping port and the slurry discharge pipe; S403, connecting the next section of steel casing, transmission pipeline, water supply pipe and slurry discharge pipe, and repeating steps S401 to S402 until the end of the steel casing penetrates the pile body of the high-pressure rotary jet pile.

[0017] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art: 1. The high-pressure rotary jet grouting pile diameter detection device of the present invention can calculate the diameter of the high-pressure rotary jet grouting pile based on the length of the interface between the two sides of the high-pressure rotary jet grouting pile and the soil body detected by the detection component, and then according to the inclination angle of the steel casing when drilling down, thereby avoiding the traditional drilling and coring method of drilling a large number of holes in the pile column, which causes serious damage to its strength. While ensuring the strength of the high-pressure rotary jet grouting pile, the detection accuracy is improved, the detection method is improved, and the detection efficiency is increased.

[0018] 2. The high-pressure rotary jet pile diameter detection device of the present invention uses a jacking drill to follow up the inclined full casing, and utilizes the high-pressure nozzle and slurry discharge port inside the casing to achieve the crushing and removal of the soil / pile body inside the casing, thereby solving the problem that mud wall protection is required during the existing inclined hole drilling, and the pile-soil interface cannot be intuitively detected by in-hole video.

[0019] 3. The high-pressure jet grouting pile diameter detection device of the present invention utilizes an in-tube camera to identify the pile-soil interface of the high-pressure jet grouting pile, and finally calculates the pile diameter of the high-pressure jet grouting pile, which is more accurate and convincing than the pile diameter result obtained by vertical drilling. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a high-pressure rotary jet pile diameter detection device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the use of a high-pressure rotary jet pile diameter detection device according to an embodiment of the present invention; Figure 3 This is a structural schematic diagram of a drilling assembly of a high-pressure jet grouting pile diameter detection device according to an embodiment of the present invention; Figure 4 This is a schematic structural diagram of a cleaning component of a high-pressure jet grouting pile diameter detection device according to an embodiment of the present invention; Figure 5 It is a schematic cross-sectional view of a transmission pipeline of a high-pressure rotary jet pile diameter detection device according to an embodiment of the present invention; Figure 6 A schematic diagram of a specific process of a method for detecting the diameter of a high-pressure jet grouting pile according to an embodiment of the present invention; Figure 7 It is a schematic diagram of a specific flow chart in step S400 of a method for detecting the diameter of a high-pressure jet grouting pile according to an embodiment of the present invention.

[0021] In all the drawings, the same figure numbers represent the same technical features, specifically: 1-drilling assembly, 11-inclined jacking drill, 111-frame, 112-crawler, 113-anchor rod, 114-adjustment frame, 115-lifting jack, 116-jacking jack, 117-pressure plate, 12-steel casing, 2-cleaning assembly, 21-high-pressure nozzle, 22-slurry extraction port, 23-slurry pump, 24-electronic warehouse, 25-transmission pipeline, 26-water supply pipe, 27-slurry discharge pipe, 3-detection assembly, 31-camera. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0023] Example 1 like Figure 1 , 2 As shown, an embodiment of the present invention provides a high-pressure rotary jet pile diameter detection device, which includes: a drilling component 1, a cleaning component 2 and a detection component 3. The drilling component 1 includes an inclined jacking drill rig 11 and a steel casing 12. The steel casing 12 is drilled down from the ground by the inclined jacking drill rig 11, and is drilled into the high-pressure rotary jet pile from the soil, and is drilled into the soil on the other side through the pile core of the high-pressure rotary jet pile. The cleaning component 2 and the detection component 3 are arranged in the steel casing 12. The cleaning component 2 is used to clean the soil generated during the drilling process, and the detection component 3 is used to detect the position where the boundary of the high-pressure rotary jet pile and the soil body meet. The length of the junction between the two sides of the high-pressure rotary jet pile and the soil body detected by the detection component 3, and then according to the tilt angle of the steel casing 12 when drilling, the diameter of the high-pressure rotary jet pile can be calculated, which avoids the traditional drilling and coring method of drilling a large number of holes in the pile column, resulting in serious damage to its strength, while ensuring the strength of the high-pressure rotary jet pile. Improve the detection accuracy, improve the detection method, and improve the detection efficiency.

[0024] like Figure 3As shown, the inclined pipe jacking drill 11 includes a frame 111 for overall support, crawlers 112 arranged on both sides of the frame 111, an adjustment frame 114 arranged on the frame 111, a lifting jack 115 arranged between the frame 111 and the adjustment frame 114, a jacking jack 116 arranged on the adjustment frame 114, and a pressure plate 117 arranged at one end of the jacking jack 116. Wherein, side plates extending forward and backward are arranged on both sides of the frame 111. The crawlers 112 are arranged on the side plates on both sides of the frame 111, and the frame 111 is driven to move to the working position by the crawlers 112. The rear end of the adjustment frame 114 is provided with a reinforcing plate, and the front end is provided with a guide plate, and the reinforcing plate and the guide plate are connected by a guide rod, and a reinforcing rib is also provided between the reinforcing plate and the guide rod, and a guide hole is opened on the guide rod. A slider is also provided on the guide rod of the adjustment frame 114, and the slider slides on the guide rod. One end of the adjustment frame 114 is rotatably connected to the front end of the frame 111, and the other end is connected to the rear end of the frame 111 through a lifting jack 115. The angle between the adjustment frame 114 and the high-pressure rotary jet pile is adjusted by pushing the lifting jack 115. A rotary rod is provided at the rear end of the frame 111, and the bottom end of the lifting jack 115 is connected to the frame 111 through a rotating block. The rotating block is sleeved on the rotary rod. When the lifting jack 115 pushes, the rotating block satisfies the angle change caused by the rotation of the adjustment frame 114. The pressure plate 117 is provided on the slider of the adjustment frame 114, and is connected to the reinforcing plate through a jacking jack 116. The side of the pressure plate 117 away from the jacking jack 116 is provided with a top corresponding to the position of the guide hole on the guide plate.

[0025] When in use, the lifting jack 115 adjusts the adjustment frame 114 to a designed angle with the high-pressure jet grouting pile, installs the steel casing 12 between the pressing plate 117 and the guide plate of the adjustment frame 114, the front end of the steel casing 12 passes through the guide hole of the guide plate, and the rear end is arranged on the top of the top, and the steel casing 12 is drilled into the soil by the jacking jack 116. The steel casing 12 is a multi-section hollow structure, and adjacent steel casings 12 are detachably connected by threads. When drilling, new steel casings 12 are continuously added at the adjustment frame 114 to reach a length that penetrates the high-pressure jet grouting pile.

[0026] Preferably, both ends of the side plates of the frame 111 are also provided with upwardly extending columns, and the columns are provided with anchor rods 113. After one end of the anchor rod 113 is sleeved on the column, the other end is inserted into the soil to achieve temporary positioning of the inclined pipe jacking drill rig 11 to prevent it from shifting due to reaction force during drilling, resulting in changes in the inclination angle, and ultimately affecting the detection results.

[0027] The steel casing 12 is a hollow tube, and a jacking force is applied to it by a jacking jack 116 so that it can be drilled into the soil and the high-pressure jet grouting pile.

[0028] During the drilling process of the steel casing 12 , the original soil and pile bodies drilled down enter the steel casing 12 , and therefore need to be cleaned by the cleaning assembly 2 .

[0029] like Figure 4 , 5 As shown, the cleaning component 2 is arranged inside the steel casing 12, and is divided into three interconnected front, middle and rear sections, which include a high-pressure nozzle 21, a slurry extraction port 22, a slurry pump 23, an electronic compartment 24, a transmission pipeline 25, a water supply pipe 26 and a slurry discharge pipe 27. The high-pressure nozzle 21 is arranged at the end of the front section, and is used to spray high-pressure water flow to punch and crush the original soil and pile body inside the steel casing 12, and mix it with water to form mud. The slurry extraction port 22 is arranged on the side of the front section, and the mixed mud is extracted from the steel casing 12 through the slurry extraction port 22. The slurry pump 23 is arranged inside the middle section, and is used to provide power for the slurry extraction port 22 to extract the mud. The electronic compartment 24 is arranged inside the rear section, and components including batteries and low-frequency beacons are integrated therein. The cleaning assembly 2 is also provided with a transmission pipeline 25, in which a water supply pipe 26 and a slurry discharge pipe 27 are provided to provide a water source for the high-pressure nozzle 21 and to transport the slurry extracted from the slurry extraction port 22 to the ground for discharge. The water supply pipe 26 is connected to a water supply bin provided on the ground, and the slurry discharge pipe 27 is connected to a slurry storage bin provided on the ground.

[0030] The transmission pipeline 25, water supply pipe 26 and slurry discharge pipe 27 are all multi-section pipes. When adding steel casing 12 during drilling, the above pipe sections are connected and added.

[0031] Preferably, the front section of the cleaning component 2 is provided with a front roller, and the rear section is provided with a rear roller, and the cleaning component 2 is driven to move inside the steel casing 12 by the front roller and the rear roller.

[0032] The detection component 3 includes a camera 31 , which is arranged on the front section of the cleaning component 2 , and the image information during the drilling process is obtained through the camera 31 .

[0033] The detection device provided in the embodiment of the present invention further includes a controller, which is connected to the component signals in the electronic compartment 24 to control the rotation of the front roller and the rear roller. The controller is also connected to the camera 31 to receive the image information captured by the camera 31. The camera 31 is provided with a light source for supplementary lighting.

[0034] Example 2 like Figure 6As shown, an embodiment of the present invention provides a method for detecting the diameter of a high-pressure jet grouting pile, which specifically includes the following steps: S100, determining the core coordinates of the high-pressure jet grouting pile to be tested according to the design parameters, using a total station to place points, and determining the angle between the steel casing 12 and the high-pressure jet grouting pile according to the design height of the high-pressure jet grouting pile to be tested and the on-site topography; S200, according to the determined angle and the pile core coordinates, determine the point where the steel casing 12 is buried, and use the total station to place points to confirm the location and direction of the inclined pipe jacking drilling rig 11; S300, driving the inclined pipe jacking drill 11 to a position, adjusting the orientation, and fixing anchor rods 113 at the four corners of the inclined pipe jacking drill 11, so that the inclined pipe jacking drill 11 always maintains its original posture; S400, start the lifting jack 115, so that the angle between the adjustment frame 114 and the high-pressure rotary grouting pile is the same as the angle between the steel casing 12 and the high-pressure rotary grouting pile, and use the jacking jack 116 to press the steel casing 12 into the soil at a determined angle and completely penetrate the high-pressure rotary grouting pile; S500, using a controller to control the camera 31 to turn on, and observe the hole wall of the inclined borehole until the camera 31 observes the intersection points between the two sides of the high-pressure jet grouting pile and the soil; S600, calculating the distance between the intersection points of the two sides of the high-pressure jet grouting pile and the soil, and then calculating the diameter of the high-pressure jet grouting pile according to the distance and the angle between the steel casing 12 and the high-pressure jet grouting pile; S700, pull out and disassemble the steel casing 12, the transmission pipeline 25, the water supply pipe 26 and the slurry discharge pipe 27 in sequence, complete the inspection operation, and transfer the inclined jacking drill rig 11 to the next point for inspection.

[0035] In step S100, when determining the angle between the steel casing 12 and the high-pressure rotary jet pile, the steel casing 12 needs to pass through the core of the high-pressure rotary jet pile, and the angle is also the angle between the steel casing 12 and the core of the high-pressure rotary jet pile, that is, the axis of the steel casing 12 and the axis of the high-pressure rotary jet pile are in the same section to ensure that the steel casing 12 can penetrate the interface where the core of the high-pressure rotary jet pile is located. The angle between the steel casing 12 and the high-pressure rotary jet pile is preferably 45° to 60°.

[0036] like Figure 7 As shown, step S400 specifically includes the following steps: S401, fix the single-section steel casing 12 to the top of the pressing plate 117, place the cleaning assembly 2 inside the steel casing 12, start the jacking jack 116, and press the steel casing 12 into the soil at a determined angle; S402, start the high-pressure nozzle 21 and the slurry pump 23, so that the soil inside the steel casing 12 is crushed by the high-pressure water and mixed with the soil to form mud, which is discharged into the slurry storage bin through the slurry extraction port 22 and the slurry discharge pipe 27; S403, connect the next section of steel casing 12, the transmission pipeline 25, the water supply pipe 26 and the slurry discharge pipe 27, and repeat steps S401-S402 until the end of the steel casing 12 penetrates the pile body of the high-pressure rotary jet pile.

[0037] In step S403, the distance that the end of the steel casing 12 penetrates the high-pressure jet grouting pile body is determined by the pile diameter.

[0038] Before step S500, the following steps are also included: pulling out the steel casing 12 step by step at an interval of 50 cm each time.

[0039] In step S600, the intersection points of the two sides of the high-pressure jet grouting pile and the soil are points A and B, and the distance between the two points A and B is , then the diameter of the high-pressure jet grouting pile is for:

[0040] in, It is the angle between the steel casing 12 and the high-pressure jet grouting pile.

[0041] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-pressure jet grouting pile diameter detection device, characterized in that: include: A drilling component (1), a cleaning component (2) and a detection component (3); The drilling assembly (1) comprises an inclined jacking drill (11) and a steel casing (12), and the steel casing (12) is drilled obliquely from the ground by the inclined jacking drill (11), drilled from the soil into the high-pressure jet grouting pile, and drilled through the pile core of the high-pressure jet grouting pile into the soil on the other side; The cleaning component (2) is arranged in the steel casing (12) and is used to clean the mud generated during the drilling process; The detection component (3) is arranged in the steel casing (12) and is used to detect the position where the boundary of the pile and the soil meet. The diameter of the pile is calculated based on the length of the boundary between the two sides of the pile and the soil detected by the detection component (3) and the inclination angle of the steel casing (12) when drilling.

2. A high-pressure jet grouting pile diameter detection device according to claim 1, characterized in that: The inclined pipe jacking drill (11) comprises a frame (111) for overall support, crawlers (112) arranged on both sides of the frame (111), an adjustment frame (114) arranged on the frame (111), a lifting jack (115) arranged between the frame (111) and the adjustment frame (114), a jacking jack (116) arranged on the adjustment frame (114), and a pressure plate (117) arranged at one end of the jacking jack (116).

3. A high-pressure jet grouting pile diameter detection device according to claim 2, characterized in that: Side panels extending forward and backward are provided on both sides of the frame (111); The crawler belt (112) is arranged on the side plates on both sides of the frame (111), and the frame (111) is driven to move to the working position by the crawler belt (112).

4. A high-pressure jet grouting pile diameter detection device according to claim 3, characterized in that: The rear end of the adjustment frame (114) is provided with a reinforcing plate, and the front end is provided with a guide plate, the reinforcing plate and the guide plate are connected via a guide rod, reinforcing ribs are further provided between the reinforcing plate and the guide rod, and a guide hole is provided on the guide rod; The guide rod of the adjustment frame (114) is also provided with a sliding block, and the sliding block slides on the guide rod; One end of the adjustment frame (114) is rotatably connected to the front end of the frame (111), and the other end is connected to the rear end of the frame (111) via a lifting jack (115). The angle between the adjustment frame (114) and the high-pressure jet grouting pile is adjusted by pushing the lifting jack (115).

5. A high-pressure jet grouting pile diameter detection device according to claim 3, characterized in that: A rotating rod is provided at the rear end of the frame (111), and the bottom end of the lifting jack (115) is connected to the frame (111) via a rotating block. The rotating block is sleeved on the rotating rod. When the lifting jack (115) is pushed, the rotating block is used to meet the angle change caused by the rotation of the adjustment frame (114); The pressure plate (117) is arranged on the slider of the adjustment frame (114), and is connected to the reinforcing plate via a jacking jack (116). A tip corresponding to the position of the guide hole on the guide plate is provided on the side of the pressure plate (117) away from the jacking jack (116).

6. A high-pressure jet grouting pile diameter detection device according to any one of claims 1 to 5, characterized in that: The cleaning component (2) is arranged inside the steel casing (12) and is divided into three interconnected sections: front, middle and rear sections; It comprises a high-pressure nozzle (21), a slurry extraction port (22), a slurry pump (23), an electronic bin (24), a transmission pipeline (25), a water supply pipe (26), and a slurry discharge pipe (27).

7. A high-pressure jet grouting pile diameter detection device according to claim 6, characterized in that: The high-pressure nozzle (21) is arranged at the end of the front section and is used to spray high-pressure water flow to cut and crush the original soil and pile body inside the steel casing (12) and mix them with water to form mud; The slurry extraction port (22) is arranged on the side of the front section, and the mixed slurry is extracted from the steel casing (12) through the slurry extraction port (22); The slurry pump (23) is arranged inside the middle section and is used to provide power for pumping out slurry through the slurry pumping port (22); The electronic compartment (24) is arranged inside the rear section, and has components including a battery and a low-frequency beacon integrated therein.

8. A high-pressure jet grouting pile diameter detection device according to claim 7, characterized in that: The cleaning component (2) is also provided with a transmission pipeline (25), and the transmission pipeline (25) is provided with a water supply pipe (26) and a slurry discharge pipe (27) for providing a water source for the high-pressure nozzle (21) and for conveying the slurry extracted from the slurry extraction port (22) to the ground for discharge; The water supply pipe (26) is connected to a water supply bin arranged on the ground, and the slurry discharge pipe (27) is connected to a slurry storage bin arranged on the ground.

9. A method for detecting the diameter of a high-pressure jet grouting pile, implemented by using a device for detecting the diameter of a high-pressure jet grouting pile as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: S100, determining the core coordinates of the high-pressure jet grouting pile to be tested according to the design parameters, using a total station to place points, and determining the angle between the steel casing (12) and the high-pressure jet grouting pile according to the design height of the high-pressure jet grouting pile to be tested and the on-site topography; S200, determining the position of the steel casing (12) into the soil according to the determined angle and the pile core coordinates, and confirming the position and orientation of the inclined pipe jacking drilling rig (11) by placing points using a total station; S300, driving the inclined pipe jacking drill (11) to a position, adjusting the orientation, and fixing anchor rods (113) at the four corners of the inclined pipe jacking drill (11) so that the inclined pipe jacking drill (11) always maintains its original posture; S400, starting the lifting jack (115) so that the angle between the adjustment frame (114) and the high-pressure jet grouting pile is the same as the angle between the steel casing (12) and the high-pressure jet grouting pile, and using the jacking jack (116) to press the steel casing (12) into the soil at a determined angle and completely penetrate the high-pressure jet grouting pile; S500, using a controller to control the camera (31) to turn on and observe the wall of the inclined borehole until the camera (31) observes the intersection of the two sides of the high-pressure jet grouting pile and the soil; S600, calculating the distance between the intersection points of the two sides of the high-pressure jet grouting pile and the soil, and then calculating the diameter of the high-pressure jet grouting pile based on the distance and the angle between the steel casing (12) and the high-pressure jet grouting pile; S700, the steel casing (12), the transmission pipeline (25), the water supply pipe (26) and the slurry discharge pipe (27) are sequentially pulled out and disassembled, the inspection operation is completed, and the inclined jacking drill (11) is transferred to the next point for inspection.

10. A method for detecting the diameter of a high-pressure jet grouting pile according to claim 9, characterized in that: In step S400, the following steps are specifically included: S401, fixing a single-section steel casing (12) to the top of a pressing plate (117), placing a cleaning assembly (2) inside the steel casing (12), starting a jacking jack (116), and pressing the steel casing (12) into the soil at a determined angle; S402, starting the high-pressure nozzle (21) and the slurry pump (23), so that the soil inside the steel casing (12) is crushed by the high-pressure water and mixed with the soil to form slurry, which is then discharged into the slurry storage bin through the slurry extraction port (22) and the slurry discharge pipe (27); S403, connecting the next section of the steel casing (12), the transmission pipeline (25), the water supply pipe (26) and the slurry discharge pipe (27), and repeating steps S401 to S402 until the end of the steel casing (12) penetrates the pile body of the high-pressure jet grouting pile.

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