An internal energy type intelligent cutting and pressing integrated micro steel pipe pile pressurizing device and method

Abstract

The application discloses an inner energy type intelligent cutting and pressing integrated micro steel pipe pile pressurizing device and method, which comprises an inner energy type intelligent cutting and pressing integrated pressurizing device, an external pressurizing pipe, a micro steel pipe pile, a comprehensive control cable and an intelligent pressurizing control cabinet. The application can solve the problems that the traditional micro steel pipe pile cannot improve the single pile bearing capacity through the pile foundation pressurizing technology and cannot be applied in hard rock soil layers. The application is based on the inner energy driving principle, utilizes the fluid kinetic energy contained in the high-pressure cement slurry to drive the cutting cutter to work, simultaneously realizes the functions of cutting rock soil and pressurizing reinforcement, does not need to additionally set an external driving device, realizes the simplification of the device and the reduction of the cost. The application can intelligently sense the rock soil condition, intelligently carries out the operation according to the optimal pressurizing parameters and cutting parameters according to the rock soil condition. The application simultaneously has the recyclable and reusable functions.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of water conservancy and water transportation engineering construction, and particularly relates to an internal energy type intelligent pressure reduction integrated micro steel pipe pile pressure grouting device and method. BACKGROUND

[0002] The micro steel pipe pile is a new type of pile combining the steel pipe pile and the micro pile technology, and has the characteristics of strong adaptability, high safety, and convenient construction. In recent years, the micro steel pipe pile has been widely valued by engineering personnel and gradually promoted in water conservancy and water transportation engineering due to its unique advantages. However, the existing micro steel pipe pile sinking process (hammering method and static pressure method) limits the application of the micro steel pipe pile. The existing micro steel pipe pile is not easy to penetrate the rock-soil layer and is prone to damage to the pile end when sinking in the hard rock-soil layer, and is only suitable for sinking in soft soil layers with small sinking resistance, and cannot be applied to hard soil or rock layers. At the same time, the diameter of the micro steel pipe pile is generally small, usually 100-300 mm, so the single pile bearing capacity is limited, which to some extent affects and limits the application range of the micro steel pipe pile. The pile foundation pressure grouting process effectively enhances the strength of the rock-soil layer around the pile by pressing cement slurry into the rock-soil layer around the pile, thereby improving the pile foundation bearing capacity. At present, the pile foundation pressure grouting process has been widely applied to cast-in-place piles, but due to the limitations of the micro steel pipe pile construction process and the existing pile foundation pressure grouting device, the application of the pile foundation pressure grouting process in the micro steel pipe pile is still rare.

[0003] The traditional pressure grouting device usually extends the pressure grouting valve out of the pile bottom or the pile side, and the slurry outlet hole is arranged on the side wall of the pressure grouting valve. However, the micro steel pipe pile is usually sunk by the hammering method or the static pressure method, so the traditional pressure grouting device will be severely damaged during the sinking process of the micro steel pipe pile. In addition, the existing micro steel pipe pile often cannot effectively enter the hard soil layer or rock layer. The above defects limit the application of the pile foundation pressure grouting process in the micro steel pipe pile. How to solve the above problems is the key to effectively improve the pile foundation bearing capacity of the micro steel pipe pile, and there is currently no effective measure to solve the above problems. SUMMARY

[0004] The purpose of the present application is to provide an internal energy type intelligent pressure reduction integrated micro steel pipe pile pressure grouting device and method, which solves the problems that the traditional micro steel pipe pile cannot improve the single pile bearing capacity by the pile foundation pressure grouting technology and cannot be applied in hard rock-soil layers.

[0005] To achieve the above purpose, the technical scheme of the present application is as follows:

[0006] An internally powered intelligent integrated grouting device for micro steel pipe piles includes an internally powered intelligent integrated grouting device, an external grouting pipe, micro steel pipe piles, a comprehensive control cable, and an intelligent grouting control cabinet; the internally powered intelligent integrated grouting device includes an intelligent sensing rock breaker, an intelligent integrated grouting device, a reusable multi-functional rolling bearing, and a pin-type sealed grouting joint.

[0007] Furthermore, the intelligent sensing rock breaker is connected to the intelligent integrated cutting and pressing grouting device via a first hollow bolt. The tail of the intelligent integrated cutting and pressing grouting device is inserted into the end of the micro steel pipe pile and connected to the reusable multi-functional rolling bearing via a second hollow bolt. The reusable multi-functional rolling bearing is fixed to the inner wall of the micro steel pipe pile via a second electromagnetic buckle. The reusable multi-functional rolling bearing is connected to the external grouting pipe via a pin-type sealing grouting joint. The intelligent grouting control cabinet controls the intelligent integrated cutting and pressing grouting device and the reusable multi-functional rolling bearing via control commands.

[0008] Preferably, the intelligent sensing rock breaker includes an RI-CPTU probe, a soil guide plate, a rock and soil layer parameter analysis and decision module, a first built-in cable, and a first hollow bolt; the intelligent sensing rock breaker has a geological parameter inversion function, which can determine in real time the distribution and property changes of the rock or soil layers encountered by the micro steel pipe pile during pile driving, cutting and grouting.

[0009] Preferably, the intelligent integrated grouting device includes a cutting disc, an integrated grouting device base tube, a grout outlet, a grouting parameter sensing module, a first sealing rubber ring, rotor blades, a magnetic coupling regulator, a rotation sensor, and a second hollow bolt; the cutting blades are fixed to the cutting blade base by a first electromagnetic buckle to form a cutting disc; the blade angle and orientation of the rotor blades can be adjusted by the magnetic coupling regulator.

[0010] A smart grouting method, based on the aforementioned internal energy-type smart cutting and pressing integrated micro steel pipe pile grouting device, specifically includes the following steps:

[0011] The intelligent sensing rock breaker provides real-time feedback to the intelligent grouting control cabinet on the type, distribution, and geological parameters of the soil and rock layers; the intelligent grouting control cabinet then intelligently adjusts the grouting parameters based on the feedback data.

[0012] Preferably, when the aforementioned internal energy-type intelligent pressure-reducing integrated micro steel pipe pile grouting device is located in the soil layer, the grout pressure P is adjusted in real time according to the following calculation formula:

[0013]

[0014] In the formula, P is the grout pressure; K1, K2 and K3 are correction coefficients; c is the cohesion of the soil layer; H is the burial depth of the soil layer where the grouting location is located; γ is the average effective unit weight of each rock and soil layer above the grouting location; The internal friction angle of the soil layer where the grouting location is located.

[0015] Preferably, when the aforementioned internal energy-type intelligent pressure-reducing integrated micro steel pipe pile grouting device is located in a rock layer, the grout pressure P is adjusted in real time according to the following calculation formula:

[0016] P = K4γH + K5(RQD)

[0017] In the formula, P is the grout pressure; K4 and K5 are correction coefficients; RQD is the rock quality index; H is the burial depth of the rock layer where the grouting location is located; and γ is the average effective unit weight of each soil and rock layer above the grouting location.

[0018] Preferably, the slurry flow velocity V and slurry flow rate Q of the high-pressure cement grout in the intelligent pressure-shrinking integrated grouting device can be calculated based on the slurry pressure P. The calculation formulas for slurry flow velocity V and slurry flow rate Q are as follows:

[0019]

[0020] In the formula, V is the slurry velocity; Q is the slurry flow rate; P is the slurry pressure; P s D is the hydrostatic pressure of the soil layer where the grouting is located; D is the inner diameter of the grouting pipe at the location of the grout.

[0021] A method for intelligent cutting of rock and soil, based on the internal energy-type intelligent cutting and pressing integrated micro steel pipe pile grouting device described in claim 3, specifically includes the following steps:

[0022] The intelligent sensing rock breaker provides real-time feedback to the intelligent grouting control cabinet on the type, distribution, and geological parameters of the soil and rock layers; the rotation speed sensor provides real-time feedback to the intelligent grouting control cabinet on the cutting speed of the cutting disc; the intelligent grouting control cabinet sends adjustment commands to the magnetic coupling regulator to change the blade angle, attitude, and rotation speed of the rotor blades; the rotor blades that change the rotation speed drive the cutting disc to change the cutting speed through the integrated grouting device base tube.

[0023] Preferably, the formula for calculating the rotational speed n of the cutting disc and rotor blades is as follows:

[0024]

[0025] In the formula, n is the rotational speed of the cutting disc and the rotor blades, and D is the inner diameter of the grouting pipe at the location of the rotor blades; N y S represents the number of blades on the rotor blades. yβ is the vertical projected area of ​​a single blade on the rotor blade; β is the angle between the normal of the centroid point of the rotor blade and the direction of slurry flow; V is the slurry flow velocity; f is the fluid characteristic calculation coefficient.

[0026] A construction method for an internal energy-type intelligent integrated micro steel pipe pile grouting device includes the following steps:

[0027] a. Once the predetermined construction location is determined, the internal energy type intelligent cutting and pressing integrated grouting device is installed into the micro steel pipe pile, and the verticality of the pile body is controlled in preparation for the pile driving operation;

[0028] b. Conduct a water pressure test, using water as the grouting medium to check whether the internal energy type intelligent cutting and pressing integrated grouting device is working properly. Control the rotation speed of the cutting disc through the intelligent grouting control cabinet, and press the micro steel pipe pile equipped with the internal energy type intelligent cutting and pressing integrated grouting device into the soil.

[0029] c. Formal construction work is carried out by changing the grouting medium from clean water to cement slurry. The intelligent grouting control cabinet controls the rotation speed of the cutting disc and the driving speed of the micro steel pipe piles. Cutting and grouting operations are carried out simultaneously during the pile driving process.

[0030] d. After construction is completed, the intelligent grouting control cabinet sends an unlocking command to the first electromagnetic buckle and the second electromagnetic buckle to release the locking state of the first electromagnetic buckle and the second electromagnetic buckle, and lifts up to retrieve the internal energy type intelligent pressure-cutting integrated grouting device.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. This invention utilizes an intelligent sensing rock breaker to penetrate the soil and rock layer. Cement slurry drives the cutting disc to cut the soil and rock layer, effectively preventing damage to the pile body and grouting device from the hard soil and rock layer during the pile driving process. This expands the application range of micro-steel pipe piles in hard soil and rock layers. Furthermore, while cutting the soil and rock, this invention simultaneously injects cement slurry into the soil and rock being cut, thus simultaneously achieving the functions of cutting the soil and rock and grouting reinforcement (integrated cutting and grouting function).

[0033] 2. Based on the principle of internal energy drive, the driving force of the cutting disc comes from the fluid kinetic energy contained in the high-pressure cement slurry itself. This invention does not require an additional external power to drive the cutting disc. At the same time, the device has a recyclable and reusable function, which simplifies the device and reduces costs (internal energy drive and recyclable and reusable function).

[0034] 3. The device can sense the condition of the soil and rock mass in real time during the construction process and adjust the optimal grouting and cutting parameters in a timely manner according to the condition of the soil and rock mass, so that the cement grout can be better mixed with the soil around the pile, ensuring that the micro steel pipe pile can successfully complete the pile driving and grouting operations (intelligent sensing, intelligent pressure adjustment and intelligent speed change). Attached Figure Description

[0035] Figure 1 This is a schematic diagram of an internal energy-type intelligent pressure-reducing integrated micro steel pipe pile grouting device provided by the present invention;

[0036] Figure 2 This is a side cross-sectional view of the internal energy type intelligent grouting device of the present invention;

[0037] Figure 3 This is a schematic diagram of the internal energy type intelligent grouting device of the present invention;

[0038] Figure 4 This is a schematic diagram of the structure of the intelligent sensing rock breaker of the present invention;

[0039] Figure 5 This is a schematic diagram of the intelligent integrated grouting and pressing device of the present invention;

[0040] Figure 6 This is a schematic diagram of the reusable multifunctional rolling bearing of the present invention;

[0041] Figure 7 This is a schematic diagram of the structure of the pin-type sealing grouting joint of the present invention;

[0042] Figure 8 It is the measured residual value of grout pressure in cohesive-free soil obtained by applying the prediction formula of this invention;

[0043] Figure 9 It is the measured residual value of grout pressure in cohesive soil obtained by applying the prediction formula of this invention;

[0044] Figure 10 It is the measured residual value of grout pressure in the rock layer obtained by applying the prediction formula of this invention;

[0045] Figure 11 This is a comparison chart of measured and predicted values ​​of the relationship between the rotational speed of the cutting disc and the slurry flow rate V using the present invention.

[0046] Figure 12 This is a comparison chart of the measured and predicted values ​​of the relationship between the rotational speed of the cutting disc and the blade angle β using the present invention;

[0047] Figure 13 This is a schematic diagram illustrating the construction process and application effect of the miniature steel pipe piles using the present invention;

[0048] The diagram shows: 1-Internal energy type intelligent cutting and pressing integrated grouting device, 2-External grouting pipe, 3-Miniature steel pipe pile, 4-Integrated control cable, 5-Intelligent grouting control cabinet, 101-Intelligent sensing rock breaker, 102-Intelligent cutting and pressing integrated grouting device, 103-Reusable multi-functional rolling bearing, 104-Pin-type sealing grouting joint, 1011-RI-CPTU probe, 1012-Soil guide baffle, 1013-Soil layer parameter analysis and decision module, 1014-First built-in cable, 1015-First hollow bolt, 1021-Cutting disc, 1022-Integrated grouting device base pipe, 102 3- Grout outlet, 1024- Grouting parameter sensing module, 1025- First sealing rubber ring, 1026- Rotor blade, 1027- Magnetic coupling regulator, 1028- Rotation sensor, 1029- Second hollow bolt, 10211- Cutting blade, 10212- First electromagnetic buckle, 10213- Cutting blade base, 1031- Second electromagnetic buckle, 1032- Roller bearing, 1033- First built-in grouting pipe, 1041- Second built-in grouting pipe, 1042- Second sealing rubber ring, 1043- Outer O-ring, 1044- Control signal relay module. Detailed Implementation

[0049] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0050] Example 1

[0051] See Figure 1 This invention discloses an internally powered intelligent integrated cutting and grouting micro-steel pipe pile grouting device, comprising: an internally powered intelligent integrated cutting and grouting device 1, an external grouting pipe 2, a micro-steel pipe pile 3, a comprehensive control cable 4, and an intelligent grouting control cabinet 5. The internally powered intelligent integrated cutting and grouting device 1 performs intelligent cutting of the soil and rock layers and intelligent grouting, and can provide real-time feedback of soil and rock layer parameters and grouting parameters to the intelligent grouting control cabinet 5. The intelligent grouting control cabinet 5 has intelligent analysis and control functions, controlling the internally powered intelligent integrated cutting and grouting device 1 to simultaneously perform cutting and grouting operations. The intelligent grouting control cabinet 5 integrates cement slurry storage, mixing, and conveying functions, and adjusts and controls grouting parameters (slurry pressure P, slurry flow rate V, slurry flow rate Q) in real time. The internally powered intelligent integrated cutting and grouting device 1 is connected to the intelligent grouting control cabinet 5 via the external grouting pipe 2 and the comprehensive control cable 4.

[0052] See Figure 1 , Figure 2 and Figure 3The following are the specific steps for fabricating an internally powered intelligent integrated grouting device 1: An intelligent sensing rock breaker 101 is connected to an intelligent integrated grouting device 102 via a first hollow bolt 1015. The intelligent integrated grouting device 102 is then connected to a reusable multi-functional rolling bearing 103 via a second hollow bolt 1029. A pin-type sealed grouting joint 104 is directly installed on the reusable multi-functional rolling bearing 103 using a pin connection. The internally powered intelligent integrated grouting device 1 is connected to an external grouting pipe 2 via welding. A comprehensive control cable 4 is connected to the control signal relay module 1044 of the internally powered intelligent integrated grouting device 1.

[0053] The connected internal energy-type intelligent pressure-cutting integrated grouting device 1, external grouting pipe 2, and integrated control cable 4 are inserted into the pile end of the micro steel pipe pile 3. The second electromagnetic buckle 1031 is set to a locked state via the intelligent grouting control cabinet 5, allowing it to be secured to the inner wall of the micro steel pipe pile 3. Based on the dimensions of the energy-type intelligent pressure-cutting integrated grouting device 1 and the locking position of the second electromagnetic buckle 1031, concave locking points are pre-set at corresponding positions on the inner wall of the micro steel pipe pile 3. The number of concave locking points corresponds to the number of second electromagnetic buckles 1031, with a maximum number N of 2, and they are evenly distributed around the central axis of the micro steel pipe pile 3. When the diameter of the internal energy-type intelligent pressure-cutting integrated grouting device 1 is in the range of 100–300 mm, its dimensions are adjusted to match the actual dimensions of the micro steel pipe pile 3.

[0054] See Figure 2 and Figure 4 The intelligent sensing rock breaker 101 is installed at the outer edge of the front end of the micro-steel pipe pile 3, enabling the micro-steel pipe pile 3 to penetrate hard rock and soil layers and obtain inverted geological parameters of the rock and soil layers during pile driving and grouting processes. The intelligent sensing rock breaker 101 includes an RI-CPTU probe 1011, a soil guiding baffle 1012, a rock and soil layer parameter analysis and decision module 1013, a first built-in cable 1014, and a first hollow bolt 1015. The outer shell of the RI-CPTU probe 1011 is made of hard alloy material, is conical, and has a cone angle of less than 30°. The RI-CPTU probe 1011 is powered by a built-in battery and has a geological parameter inversion function. It can determine in real time the distribution and type of rock and soil layers encountered by the micro-steel pipe pile 3 during pile driving, cutting, and grouting processes, and obtain in real time the average effective unit weight γ, cohesion c, and internal friction angle of the rock and soil layers. Rock quality index RQD, soil and rock layer burial depth H, hydrostatic pressure P s And soil and rock layer parameters such as water content ω.

[0055] The soil guide baffle 1012, made of hard alloy material, is streamlined and positioned behind the intelligent sensing rock breaker 101, serving to guide and divert soil. The soil guide baffle 1012 houses a soil-rock layer parameter analysis and decision-making module 1013. The intelligent sensing rock breaker 101 is threadedly connected to the soil guide baffle 1012. The RI-CPTU probe 1011 and the soil-rock layer parameter analysis and decision-making module 1013 are connected via a first internal cable 1014. The soil-rock layer parameter analysis and decision-making module 1013 is powered by an internal battery and has wireless communication capabilities. Data collected by the RI-CPTU probe 1011 is transmitted via the first internal cable 1014 to the soil-rock layer parameter analysis and decision-making module 1013 for processing and analysis. The processed and analyzed data is then fed back to the intelligent grouting control cabinet 5 via wireless communication. The intelligent sensing rock breaker 101 is connected to the intelligent integrated cutting and pressing grouting device 102 via a first hollow bolt 1015.

[0056] See Figure 2 and Figure 5 A smart variable speed cutting and grouting integrated grouting device 102 was fabricated, comprising a cutting disc 1021, an integrated grouting device base tube 1022, a grout outlet 1023, a grouting parameter sensing module 1024, a first sealing rubber ring 1025, rotor blades 1026, a magnetic coupling regulator 1027, a rotation speed sensor 1028, a second hollow bolt 1029, a cutting blade 10211, a first electromagnetic buckle 10212, and a cutting blade base 10213. The first sealing rubber ring 1025 on the smart variable speed cutting and grouting integrated grouting device 102 is flush with the pile end of the micro steel pipe pile 3. The cutting disc 1021, the integrated grouting device base tube 1022, and the grout outlet 1023 on the smart variable speed cutting and grouting integrated grouting device 102 are located outside the pile end of the micro steel pipe pile 3 to facilitate intelligent cutting and grouting operations in the soil and rock layers. The cutting disc 1021 is made of cemented carbide and is used for cutting rock and soil layers. A first electromagnetic latch 10212 is integrated into the cutting blade base 10213. The cutting blade 10211 is fixed to the cutting blade base 10213 via the first electromagnetic latch 10212 to form the cutting disc 1021. After construction, when retrieving the intelligent variable speed cutting and pressing integrated grouting device 102, an unlocking command is sent to the first electromagnetic latch 10212 through the intelligent grouting control cabinet 5, causing the cutting blade 10211 to detach and preventing it from obstructing the lifting and retrieval of the intelligent variable speed cutting and pressing integrated grouting device 102 from the micro steel pipe pile 3.

[0057] The integrated grouting unit base tube 1022 serves as both a mounting base and a grouting pipe. Grout outlet holes 1023 are arranged symmetrically in a cross pattern on the integrated grouting unit base tube 1022, through which cement grout is injected into the soil layer. The grouting parameter sensing module 1024 is powered by a built-in battery and features wireless communication capabilities. It can transmit and receive the monitored grout parameters (grout pressure P, grout velocity V, grout flow rate Q) within the intelligent variable speed grouting integrated grouting unit 102 in real time to the intelligent grouting control cabinet 5. The first sealing rubber ring 1025 provides sealing and support, preventing external cement grout from seeping into the micro-steel pipe pile. It also supports the gap between the intelligent variable speed grouting integrated grouting unit 102 and the micro-steel pipe pile 3, preventing the intelligent variable speed grouting integrated grouting unit 102 from shaking within the micro-steel pipe pile 3.

[0058] The rotor blades 1026 are mounted on the inner wall of the integrated grouting unit base tube 1022 via a rotating shaft. The rotor blade angle can be adjusted by a magnetic coupling regulator 1027, which is powered by a built-in battery and has wireless communication capabilities. It can receive control commands from the intelligent grouting control cabinet 5 in real time to control the rotor blades 1026. Each rotor blade 1026 corresponds to one magnetic coupling regulator 1027. The internal energy drive principle is widely used in weapon launching engineering. The internal energy drive principle means that when a component on a launching device is rotated, the energy driving the rotation comes from the kinetic energy contained in the medium being launched, eliminating the need for external drive equipment to rotate the component. The rotor blades 1026 function as kinetic energy converters. The rotational energy of a traditional cutting disc originates from an external motor or internal combustion engine (external energy source). The rotor blades 1026 convert the inherent kinetic energy of the cement slurry into the rotational kinetic energy of the cutting disc 1021 (internal energy source), eliminating the need for an external drive. According to current specifications, the grouting pressure during construction typically reaches 2–10 MPa, providing sufficient slurry kinetic energy to rotate the cutting disc.

[0059] The specific working principle is as follows: The cutting power of the cutting disc 1021 comes from the fluid kinetic energy contained in the high-pressure cement slurry within the intelligent integrated grouting unit 102. The high-speed flowing cement slurry drives the rotor blades 1026 to rotate, and then the rotor blades 1026 drive the cutting disc 1021 to rotate through the integrated grouting unit base tube 1022. The rotating cutting disc 1021 can cut different rock and soil layers. The rotation sensor 1028 is powered by a built-in battery and has wireless communication capabilities. It can feed back the real-time rotation count of the cutting disc 1021 and the rotor blades 1026 to the intelligent grouting control cabinet 5. Based on the principle of the same angular velocity, the cutting disc 1021 and the rotor blades 1026, which have rotating shafts, rotate at the same speed.

[0060] During construction, when the intelligent grouting control cabinet 5 receives real-time parameters of the soil and rock layers and the cutting speed from the intelligent rock-breaking device 101 and the rotation speed sensor 1028, it sends an adjustment command to the magnetic coupling regulator 1027. The magnetic coupling regulator 1027 corrects the blade angle of the rotor blades 1026 (i.e., adjusts the kinetic energy conversion rate of the cement grout), thereby intelligently adjusting the cutting speed of the cutting disc 1021. Based on the optimal cutting speed corresponding to the soil and rock layer where the cutting disc 1021 is located, the cutting speed of the cutting disc 1021 is maintained within the corresponding rotation speed range. The intelligent variable speed cutting and pressing integrated grouting device 102 is connected to the reusable multi-functional rolling bearing 103 via a second hollow bolt 1029.

[0061] See Figure 2 , Figure 6 and Figure 7 A reusable multi-functional rolling bearing 103 and a pin-type sealed grouting joint 104 are fabricated separately. The reusable multi-functional rolling bearing 103 includes a second electromagnetic buckle 1031, a roller bearing 1032, and a first built-in grouting pipe 1033. The pin-type sealed grouting joint 104 includes a second built-in grouting pipe 1041, a second sealing rubber ring 1042, an outer O-ring 1043, and a control signal relay module 1044. The reusable multi-functional rolling bearing 103 and the pin-type sealed grouting joint 104 are located inside the micro steel pipe pile 3. These two devices ensure that the external grouting pipe 2 does not rotate or deform when the internally powered intelligent cutting and pressing integrated grouting device 1 is rotating and cutting the rock and soil and performing grouting operations.

[0062] The reusable multi-functional rolling bearing 103 is recyclable. After construction, when the grouting device is lifted and retrieved, the intelligent grouting control cabinet 5 sends an unlocking command to the second electromagnetic latch 1031. The second electromagnetic latch 1031 releases the locking connection between itself and the micro steel pipe pile 3, and the internal energy type intelligent cutting and pressing integrated grouting device 1 is lifted and retrieved to the ground surface from inside the micro steel pipe pile 3. The pin-type sealed grouting joint 104 is connected to the reusable multi-functional rolling bearing 103 through an outer O-ring 1043. The control signal relay module 1044 serves as a relay receiver and converter for wireless signals. The control signal relay module 1044 can receive wireless signals from the soil and rock layer parameter analysis and decision module 1013, the coupled regulator 1027, and the rotation sensor 1028. After converting and amplifying the information into a wired signal, it is fed back to the intelligent grouting control cabinet 5 through the integrated control cable 4. Similarly, it can convert and amplify the control information sent by the intelligent grouting control cabinet 5 into a wireless signal and send it to the coupled regulator 1027.

[0063] The pin-type sealing grouting joint 104 is connected to the external grouting pipe 2 by welding. The first internal grouting pipe 1033 and the second internal grouting pipe 1041 serve to circulate the grout, and the second sealing rubber ring 1042 serves to prevent grout leakage. During cutting and grouting operations, the high-pressure grout in the external grouting pipe 2 flows through the second internal grouting pipe 1041, then flows into the first internal grouting pipe 1033, and then into the intelligent cutting and pressing integrated grouting device 102. Finally, it is pressed into the soil layer through the grout outlet 1023.

[0064] Example 2

[0065] See Figures 8-10 This embodiment provides an intelligent grouting method for an internal energy-type intelligent cutting and pressing integrated micro steel pipe pile grouting device.

[0066] During the grouting process of the micro steel pipe pile 3, the aforementioned internal energy type intelligent cutting and pressing integrated micro steel pipe pile grouting device performs intelligent grouting in the following manner.

[0067] When the intelligent sensing rock breaker 101 detects a certain rock and soil layer during construction, it can analyze the type, distribution and geological parameters of the rock and soil layer in real time, and then feed back the processed and analyzed relevant data to the intelligent grouting control cabinet 5 through wireless communication.

[0068] After receiving the soil and rock layer data fed back by the intelligent sensing rock breaker 101, the intelligent grouting control cabinet 5 calculates the optimal grouting parameters applicable to the soil and rock layer based on the type, distribution and geological parameters of the soil and rock layer. It automatically adjusts the grouting parameters of the cement slurry to the optimal grouting parameters according to the type of soil and rock layer to ensure that the grouting reinforcement effect of the soil and rock layer reaches the best.

[0069] When the internal energy-type intelligent pressure-reducing integrated micro steel pipe pile grouting device is located in the soil layer, the grout pressure P is adjusted in real time according to the following calculation formula:

[0070]

[0071] In the formula, P is the grout pressure; K1, K2, and K3 are correction coefficients, where K1 = 10.00, K2 = 0.55, and K3 = 0.00 when the soil layer is non-cohesive, and K1 = 14.00, K2 = 2.30, and K3 = 9.00 when the soil layer is cohesive; c is the cohesion of the soil layer; H is the burial depth of the soil layer where the grouting location is located; and γ is the average effective unit weight of the soil layers above the grouting location. The internal friction angle is the soil layer where the grouting location is located; the average effective unit weight γ, cohesion c, and internal friction angle are among the parameters calculated above. Soil layer parameters such as soil layer burial depth H can be set and corrected by the intelligent sensing rock breaker 101 and automatically fed back to the intelligent grouting control cabinet 5; while the calculation parameters K1, K2 and K3 are input into the AI ​​program of the intelligent grouting control cabinet 5 in advance, and the intelligent grouting control cabinet 5 automatically sets them according to the soil layer type fed back by the intelligent sensing rock breaker 101; after obtaining the above calculation parameter values, the intelligent grouting control cabinet 5 can set and correct the grout pressure P value in the intelligent cutting and pressing integrated grouting device 102 in real time according to formula (1).

[0072] Figure 8 and Figure 9 The measured residual values ​​of grout pressure obtained by applying the prediction formula of this invention to micro steel pipe piles in six actual projects are used to illustrate this. Figure 8 and Figure 9 The residual results show that the measured residual values ​​of slurry pressure in the soil layer are relatively uniformly distributed. Figure 8 The fitting accuracy R of unit linear regression analysis of measured data in cohesionless soil 2 The coefficient of variation was 0.914, indicating good fitting accuracy. The coefficients of variation of the calculated parameters K1 and K2 were both below 0.1, indicating that the dispersion of the measured slurry pressure data was very low. Figure 9 The fitting accuracy R of unit linear regression analysis of measured data in cohesive soil 2 The coefficient of variation (COP) is 0.907, indicating good fitting accuracy. The coefficients of variation for K1, K2, and K3 are less than 0.3, suggesting good dispersion of the measured slurry pressure data. Figure 8 and Figure 9 The measured slurry pressure data K1, K2, and K3 were used for inversion analysis, and the results are shown in Tables 1 and 2. Tables 1 and 2 compare the linear regression analysis results of the measured inversion data K1, K2, and K3 with the set values. The results show that the error range between the set values ​​and the average value of the measured inversion data is 3.2% to 7.8%, and the prediction error is small.

[0073] Table 1. Comparison of linear regression analysis results of measured inversion data with set values ​​for correction factors K1, K2, and K3 in cohesion-free soil layers.

[0074]

[0075] Table 2 Comparison of measured data and set values ​​for linear regression analysis of correction factors K1, K2, and K3 in cohesive soil layers.

[0076]

[0077] When the internal energy-type intelligent pressure-reducing integrated micro steel pipe pile grouting device is located in a rock layer, the grout pressure P is adjusted in real time according to the following calculation formula:

[0078] P=K4γH+K5(RQD) (2)

[0079] In the formula, P is the grout pressure; K4 and K5 are correction coefficients, K4 = 3.20 and K2 = 3500.00; RQD is the rock quality index; H is the burial depth of the rock layer where the grouting location is located; γ is the average effective unit weight of each soil and rock layer above the grouting location; the rock quality index RQD, average effective unit weight γ, burial depth H and other rock layer parameters in the above calculation parameters can be set and corrected by the intelligent rock-breaking device 101 and automatically fed back to the intelligent grouting control cabinet 5; as for the calculation parameters K4 and K5, they are input into the AI ​​program of the intelligent grouting control cabinet 5 in advance, and the intelligent grouting control cabinet 5 automatically sets them according to the rock layer information determined by the intelligent rock-breaking device 101. After obtaining the above calculation parameter values, the intelligent grouting control cabinet 5 can set and correct the grout pressure P value in the intelligent integrated grouting device 102 in real time according to formula (2).

[0080] Figure 10 The measured residual values ​​of grout pressure obtained by applying the prediction formula of this invention to micro steel pipe piles in six actual projects are used to illustrate this. Figure 10 The residual results show that the measured residual values ​​of grout pressure in the rock layer are relatively uniformly distributed. Figure 10 The fitting accuracy R of unit linear regression analysis of measured data in rock layers 2 The coefficient of variation was 0.978, indicating good fitting accuracy. The coefficients of variation for calculated parameters K1 and K2 were both below 0.1, suggesting very low dispersion in the measured slurry pressure data. Figure 10 The measured slurry pressure data K4 and K5 were used for inversion analysis, and the results are shown in Table 3. Table 3 compares the linear regression analysis results of the measured inversion data K4 and K5 with the set values. The results show that the error range between the set values ​​and the average value of the measured inversion data is less than 5.0%, and the prediction error is small.

[0081] Table 3. Results of linear regression analysis of correction coefficients K4 and K5 in rock strata.

[0082]

[0083] The grout flow velocity V and grout flow rate Q of the cement grout inside the intelligent pressure-shrinking integrated grouting device 102 can be calculated based on the grout pressure P. The calculation formulas for grout flow velocity V and grout flow rate Q are as follows:

[0084]

[0085] In the formula, V is the slurry velocity; Q is the slurry flow rate; P is the slurry pressure; P s ρ is the hydrostatic pressure of the soil layer where the grouting is located; D is the inner diameter of the grouting pipe at the location of the grout; the hydrostatic pressure P in the above calculation parameters sThe parameters of the soil and rock layers can be set and corrected by the intelligent rock-breaking device 101 and automatically fed back to the intelligent grouting control cabinet 5; the grout pressure P is automatically set and corrected by the intelligent grouting control cabinet 5 in real time according to the actual feedback working conditions; and the calculated parameters such as grout density ρ and the inner diameter D of the grouting pipe at each part are input into the intelligent grouting control cabinet 5 in advance according to the actual working conditions; after obtaining the above calculated parameter values, the intelligent grouting control cabinet 5 can obtain the grout flow rate V and grout flow rate Q in real time according to formula (3).

[0086] Example 3

[0087] See Figures 11-12 This embodiment provides an intelligent method for cutting rock and soil using an internal energy-type intelligent cutting and pressing integrated micro steel pipe pile grouting device.

[0088] During the grouting and cutting process of the micro steel pipe pile 3, the aforementioned internal energy type intelligent cutting and pressing integrated micro steel pipe pile grouting device intelligently cuts the rock and soil in the following manner.

[0089] The cutting speed of the cutting disc 1021 can be intelligently adjusted according to the actual conditions of the soil and rock layer where the cutting disc 1021 is located. The rotor blades 1026 play a role in kinetic energy conversion. The high-pressure cement slurry flowing in the intelligent integrated grouting device 102 drives the rotor blades 1026 to rotate. The rotor blades 1026 drive the cutting disc 1021 to rotate through the integrated grouting device base pipe 1022, so that the cutting disc 1021 cuts different soil and rock layers.

[0090] When the intelligent sensing rock breaker 101 touches a certain rock and soil layer during construction, the intelligent sensing rock breaker 101 provides real-time feedback to the intelligent grouting control cabinet 5 on the type, distribution and geological parameters of the rock and soil layer, and the rotation speed sensor 1028 provides real-time feedback to the intelligent grouting control cabinet 5 on the cutting speed of the cutting disc 1021.

[0091] The intelligent grouting control cabinet 5 sends adjustment commands to the magnetic coupling regulator 1027 based on the real-time cutting speed of the cutting disc 1021 and the type of soil and rock layer. The magnetic coupling regulator 1027 changes the blade angle and attitude of the rotor blades 1026, thereby changing the rotation speed of the rotor blades 1026 in the high-speed flowing cement grout, and thus changing the cutting speed of the cutting disc 1021, so that the cutting speed of the cutting disc 1021 is maintained within the corresponding optimal speed range.

[0092] The rotational speeds of the cutting disc 1021 and the rotor blades 1026 can be calculated based on the grouting parameters. When the grouting operation is stable, the cement grout can be considered to flow at a constant velocity and in a directional manner. Under high-pressure grout drive, the rotational speeds of the cutting disc 1021 and the rotor blades 1026 are the same. The formula for calculating the rotational speed n of the cutting disc 1021 and the rotor blades 1026 is as follows:

[0093]

[0094] In the formula, n is the rotational speed of the cutting disc 1021 and the rotor blade 1026, and D is the inner diameter of the grouting pipe at the location of the rotor blade 1026; N y S represents the number of blades on rotor blade 1026; y β is the vertical projected area of ​​a single blade on rotor blade 1026; β is the angle between the normal of the centroid point of rotor blade 1026 and the direction of slurry flow; V is the slurry flow velocity; f is the fluid characteristic calculation coefficient, which can be determined by pre-test commissioning.

[0095] Figure 11 This image shows a comparison between the actual and predicted rotational speeds of the cutting disc 1021 obtained using the prediction formula of this invention in a real-world micro-steel pipe pile project. Figure 11 Using the predicted value as the baseline, the accuracy of the measured value within ±20% deviation on both sides of the predicted value baseline can reach approximately 84%. Figure 12 This is a comparison chart of the measured and predicted values ​​of the rotor speed ratio and blade angle relationship of rotor blade 1026 obtained by applying the prediction formula of this invention to micro steel pipe pile 3 in actual engineering. Figure 12 Using the predicted value as the baseline, the accuracy of the measured value within ±20% deviation on both sides of the predicted value baseline can reach approximately 90%.

[0096] Example 4

[0097] See Figure 1 and Figure 13 The construction method of the internal energy type intelligent pressure-cutting integrated micro steel pipe pile grouting device of the present invention includes the following steps:

[0098] a. Determine the predetermined construction point for the micro steel pipe pile 3 equipped with the internal energy type intelligent cutting and pressing integrated grouting device, level the micro steel pipe pile 3 and control the verticality deviation of the pile body to be less than 1%, and prepare to carry out construction work on the micro steel pipe pile 3 equipped with the internal energy type intelligent cutting and pressing integrated grouting device.

[0099] b. First, conduct a water pressure test with clean water to check whether the internal energy type intelligent cutting and pressing integrated grouting device is normal. After the check is completed, use clean water as the grouting medium to drive the cutting disc 1021 on the intelligent cutting and pressing integrated grouting device 102 to rotate. Control the rotation speed of the cutting disc 1021 to 120 r / min through the intelligent grouting control cabinet 5, and press the micro steel pipe pile 3 equipped with the internal energy type intelligent cutting and pressing integrated grouting device into the soil to about 0.2m at a pile driving speed of 2m / h.

[0100] c. After completing the above steps, the grouting medium is changed from water to cement grout. When encountering different types of soil and rock layers during the operation, the intelligent grouting control cabinet 5 controls the rotation speed of the cutting disc 1021 and the driving speed of the micro steel pipe pile 3 according to the parameters set in Table 4. Under the intelligent command of the intelligent grouting control cabinet 5, the cutting of soil and grouting operations are carried out simultaneously. The cut soil and rock debris are mixed with cement grout to form a cement-soil solidified body covering the surface of the pile.

[0101] d. After construction is completed, an unlocking command is sent to the first electromagnetic latch 10212 and the second electromagnetic latch 1031 via the intelligent grouting control cabinet 5; the first electromagnetic latch 10212 is released from its locking state, causing the cutting blade 10211 to detach from the internally powered intelligent integrated grouting device 1; the second electromagnetic latch 1031 is released from its locking state, thus disconnecting the internally powered intelligent integrated grouting device 1 from the micro steel pipe pile 3. After completing the above steps, the internally powered intelligent integrated grouting device 1 is lifted and retrieved.

[0102] Table 4. Cutting head revolutions and driving speed of micro-steel pipe piles in different soil and rock layers.

[0103]

[0104] The above detailed description of the solutions provided in the embodiments of the present invention is not intended to limit the present invention in any way. Any simple modifications, equivalent substitutions, and improvements made by those skilled in the art to the above embodiments without departing from the scope of the technical solutions of the present invention, based on the technical essence of the present invention, shall still fall within the protection scope of the technical solutions of the present invention.

Claims

1. A kind of internal energy type intelligent pressure-cutting integrated micro steel pipe pile grouting device, characterized in that: The system includes an internally powered intelligent pressure-shearing integrated grouting device (1), an external grouting pipe (2), a micro steel pipe pile (3), a comprehensive control cable (4), and an intelligent grouting control cabinet (5); the internally powered intelligent pressure-shearing integrated grouting device (1) includes an intelligent sensing rock breaker (101), an intelligent pressure-shearing integrated grouter (102), a reusable multi-functional rolling bearing (103), and a pin-type sealing grouting joint (104). The intelligent sensing rock breaker (101) is connected to the intelligent cutting and pressing integrated grouting device (102) through the first hollow bolt (1015). The tail of the intelligent cutting and pressing integrated grouting device (102) is inserted into the end of the micro steel pipe pile (3) and connected to the reusable multi-functional rolling bearing (103) through the second hollow bolt (1029). The reusable multi-functional rolling bearing (103) is fixed to the inner wall of the micro steel pipe pile (3) through the second electromagnetic buckle (1031). The reusable multi-functional rolling bearing (103) is connected to the external grouting pipe (2) through the pin-type sealing grouting joint (104). The intelligent grouting control cabinet (5) controls the intelligent cutting and pressing integrated grouting device (102) and the reusable multi-functional rolling bearing (103) through control commands. The intelligent sensing rock breaker (101) includes an RI-CPTU probe (1011), a soil guide baffle (1012), a rock and soil layer parameter analysis and decision module (1013), a first built-in cable (1014), and a first hollow bolt (1015); the intelligent sensing rock breaker (101) has a geological parameter inversion function, which can determine in real time the distribution and property changes of the rock or soil layers faced by the micro steel pipe pile (3) during pile driving, cutting and grouting. The intelligent integrated grouting device (102) includes a cutting disc (1021), an integrated grouting device base tube (1022), a grout outlet (1023), a grouting parameter sensing module (1024), a first sealing rubber ring (1025), rotor blades (1026), a magnetic coupling regulator (1027), a rotation sensor (1028), and a second hollow bolt (1029). The cutting blade (10211) is fixed on the cutting blade base (10213) by a first electromagnetic buckle (10212) to form the cutting disc (1021). The blade angle and attitude of the rotor blades (1026) are adjusted by the magnetic coupling regulator (1027).

2. A smart grouting method, characterized in that, The internal energy-type intelligent pressure-cutting integrated micro steel pipe pile grouting device according to claim 1 specifically includes the following steps: The intelligent sensing rock breaker (101) provides real-time feedback on the type, distribution and geological parameters of the soil and rock layers to the intelligent grouting control cabinet (5); the intelligent grouting control cabinet (5) intelligently adjusts the grouting parameters based on the feedback data of the soil and rock layers.

3. The intelligent grouting method according to claim 2, characterized in that, When the aforementioned internal energy-type intelligent pressure-reducing integrated micro steel pipe pile grouting device is located in the soil layer, the grout pressure... P Adjust in real time according to the following calculation formula: ， In the formula, P The pressure of the slurry; K 1. K 2 and K 3 is the correction factor; c The cohesion of the soil layer; H This refers to the burial depth of the soil layer where the grouting is located; This represents the average effective unit weight of each soil and rock layer above the grouting location; The internal friction angle of the soil layer where the grouting location is located.

4. The intelligent grouting method according to claim 2, characterized in that, When the aforementioned internal energy-type intelligent pressure-reducing integrated micro steel pipe pile grouting device is located in a rock layer, the grout pressure... P Adjust in real time according to the following calculation formula: ， In the formula, P The pressure of the slurry; K 4 and K 5 is the correction factor; This refers to the quality indicators of rock strata. H This refers to the burial depth of the rock layer where the grouting is located; This represents the average effective unit weight of each soil and rock layer above the grouting location.

5. A smart grouting method according to claim 3 or 4, characterized in that: The flow rate of high-pressure cement grout inside the intelligent integrated grouting machine (102) is... V and slurry flow rate According to slurry pressure P Conversion is performed to determine the slurry flow rate. V and slurry flow rate The calculation formula is as follows: ， In the formula, V The slurry flow rate; This refers to the slurry flow rate; P The pressure of the slurry; P s This refers to the hydrostatic pressure of the soil and rock layer where the grouting is located. D This refers to the inner diameter of the grouting pipe at the location of the grout.

6. A method for intelligent cutting of rock and soil, characterized in that, The internal energy-type intelligent pressure-cutting integrated micro steel pipe pile grouting device according to claim 1 specifically includes the following steps: The intelligent sensing rock breaker (101) provides real-time feedback to the intelligent grouting control cabinet (5) on the type, distribution, and geological parameters of the soil and rock layers; the rotation speed sensor (1028) provides real-time feedback to the intelligent grouting control cabinet (5) on the cutting speed of the cutting disc (1021); the intelligent grouting control cabinet (5) sends adjustment commands to the magnetic coupling regulator (1027) to change the blade angle, attitude, and rotation speed of the rotor blades (1026); the rotor blades (1026) with changed rotation speed drive the cutting disc (1021) to change the cutting speed through the integrated grouting base tube (1022).

7. The intelligent cutting method for rock and soil according to claim 6, characterized in that: Rotational speeds of the cutting head (1021) and rotor blades (1026) n The calculation formula is as follows: ， In the formula, n The rotational speeds of the cutting head (1021) and the rotor blades (1026) are given. D The inner diameter of the grouting pipe at the location of the rotor blade (1026); The number of blades on the rotor blade (1026); The vertical projected area of ​​a single blade on rotor blade (1026); The angle between the normal of the centroid point of the rotor blade (1026) and the direction of slurry flow; V The slurry flow rate; f Calculate coefficients for fluid properties.

8. A construction method for an internal energy-type intelligent integrated micro steel pipe pile grouting device, characterized in that, The internal energy-type intelligent pressure-cutting integrated micro steel pipe pile grouting device according to claim 1 includes the following steps: a. Once the predetermined construction location is determined, the internal energy type intelligent cutting and pressing integrated grouting device (1) is installed into the micro steel pipe pile (3), and the verticality of the pile body is controlled in preparation for pile driving operation; b. Conduct a water pressure test, using water as the grouting medium to check whether the internal energy type intelligent cutting and pressing integrated grouting device (1) is working properly. Control the rotation speed of the cutting disc (1021) through the intelligent grouting control cabinet (5) to press the micro steel pipe pile (3) equipped with the internal energy type intelligent cutting and pressing integrated grouting device (1) into the soil. c. Carry out formal construction work, change the grouting medium from clean water to cement grout, and control the rotation speed of the cutting disc (1021) and the driving speed of the micro steel pipe pile (3) with the intelligent grouting control cabinet (5). During the driving process, cutting and grouting operations are carried out simultaneously. d. After the construction is completed, the intelligent grouting control cabinet (5) sends an unlocking command to the first electromagnetic buckle (10212) and the second electromagnetic buckle (1031) to release the locking state of the first electromagnetic buckle (10212) and the second electromagnetic buckle (1031) and lift up the internal energy type intelligent cutting and pressing integrated grouting device (1).

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