Deep stirring equipment and method for reinforcing foundation through deep stirring equipment
By designing deep stirring equipment, using technical means such as high-pressure nozzles and spiral blades, the problem of uneven spraying is solved, and the uniformity and quality of foundation reinforcement are improved.
Patent Information
- Application Number
- CN202510198344.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-22
- Publication Date
- 2025-04-11
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In the existing foundation reinforcement methods, the spraying of cement slurry or other chemical substances is uneven, which affects the mixing effect and leads to poor quality of foundation reinforcement.
A deep stirring equipment is designed, using a high-pressure spray head to move along the radial direction of the mounting rod to form a spiral path to achieve uniform spraying on the periphery of the hole. At the same time, the stirring head has spiral blades and a stirring rod, and the curing agent and flow-modified soil are fully mixed by rotation and shaking.
By uniformly spraying the curing agent and thoroughly mixing, a close-connected artificial foundation column is formed, which significantly improves the quality and uniformity of foundation reinforcement.
Smart Images
Figure CN119800960A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of foundation treatment, and in particular to a deep mixing device and a method for strengthening the foundation using the deep mixing device. Background Art
[0002] Currently, foundation reinforcement is often used to enable the construction of buildings in areas of fluidized soil with high moisture content and low bearing capacity.
[0003] The foundation reinforcement method in the prior art mainly includes deep mixing pile technology, which mixes cement slurry or other chemical substances into the soft soil layer through a nozzle to form an artificial foundation column with a certain strength, thereby achieving the purpose of strengthening the foundation.
[0004] However, when the nozzle sprays cement slurry or other chemicals, it can only spray at fixed points of the hole, which makes it difficult to spray the entire hole evenly, affecting the mixing effect, so it needs to be improved. Summary of the invention
[0005] In order to improve the problem of uneven spraying of cement slurry or other chemical substances, the present application provides a deep mixing device and a method for strengthening the foundation using the same.
[0006] The deep mixing equipment provided in this application adopts the following technical solution: A deep mixing device comprises a mounting rod, a mounting sleeve and a mixing head, wherein the mounting rod is hollow inside and is used for storing a curing agent, a connecting hole is penetrated through the side wall of the mounting rod, the mounting sleeve is coaxially sleeved on the mounting rod, the mounting rod is connected with the mounting sleeve through the mounting hole, a driving assembly for driving the mounting sleeve to rotate is provided on the mounting rod, a plurality of high-pressure nozzles are provided on the mounting sleeve, the plurality of high-pressure nozzles are arranged at intervals along the circumference direction of the mounting sleeve, the high-pressure nozzles are used for spraying the curing agent in the mounting sleeve out of the mounting sleeve, the mixing head is coaxially fixed to the bottom end of the mounting sleeve, a plurality of cams are provided on the side wall of the mounting rod, the high-pressure nozzles can abut against the cams, and are used for driving the high-pressure nozzles to move radially along the mounting rod.
[0007] By adopting the above technical solution, when in use, first position and drill a hole to a predetermined depth on the fluidized soil layer, then insert the installation rod filled with curing agent into the hole, and when the stirring head reaches the bottom of the hole, start the driving assembly to rotate the installation sleeve with the installation rod as the axis, and at the same time, drive the installation rod to move up slowly. During this process, the high-pressure nozzle is opened synchronously to spray the curing agent into the hole, and the rotation and rise of the installation sleeve causes the high-pressure nozzle to move up while making a circular motion, forming a spiral path, thereby achieving stable and uniform spraying of the curing agent on the surrounding side of the hole to avoid local over-concentration or thinness.
[0008] While the high-pressure nozzle is spraying the curing agent, the high pressure makes the sprayed curing agent form a liquid knife, scraping off part of the fluidized soil on the inner wall of the hole, making it easier for the curing agent to mix with the fluidized soil, and making the curing agent and the entire fluidized soil layer more tightly connected. In the process of the high-pressure nozzle moving around the installation rod, the high-pressure nozzle can move to the cam, move along the circumferential track of the cam and then separate, so that the high-pressure nozzle can intermittently approach the inner wall of the hole, thereby increasing the impact force of the curing agent sprayed on the inner wall of the hole, making it easier to scrape off the fluidized soil for mixing.
[0009] At the same time, the high-pressure nozzle can be close to the inner wall of the hole, so that it can be adapted to spray holes with larger apertures to prevent the uniformity of spraying from being affected due to the limited spraying distance of the high-pressure nozzle, and the applicability is better.
[0010] The rotation of the installation sleeve also causes the mixing head to rotate synchronously, thereby achieving sufficient mixing of a small amount of fluidized soil and the curing agent until the installation rod is moved out of the hole. At this time, the curing agent is sprayed in the entire hole and the curing agent is mixed with the fluidized soil in the hole, and finally an artificial foundation column is formed in the hole, thereby achieving the purpose of strengthening the foundation.
[0011] Optionally, the driving assembly includes a motor and a moving rod, the motor is arranged at the top of the mounting rod, one end of the moving rod is fixed to the output end of the motor, and the other end is connected to the mounting sleeve, the motor drives the moving rod to move, and is used to drive the mounting sleeve to rotate with the mounting rod as the axis.
[0012] By adopting the above technical solution, the motor is started to drive the moving rod to rotate with the installation rod as the axis, thereby driving the installation sleeve to rotate.
[0013] Optionally, a spiral blade is provided on the side wall of the stirring head.
[0014] By adopting the above technical solution, when the mixing head rotates with the spiral blades, the spiral blades generate forced convection and shear force through rotation, so that the curing agent and the fluidized soil form a circulation flow in the hole, thereby achieving efficient and sufficient mixing, improving work efficiency, and ensuring the quality of the foundation piles.
[0015] Optionally, a plurality of stirring rods are hinged on the side wall of the stirring head, and the plurality of stirring rods are arranged at intervals along the circumference of the stirring head. A moving component is provided in the stirring head, and the moving component is connected to one end of the stirring rod inserted into the stirring head, and is used to drive one end of the stirring rod to move up and down to change the rotation angle of the stirring rod.
[0016] By adopting the above technical solution, in the initial state, the stirring rod is upwardly close to the stirring head, so that the stirring rod is located within the range of the spiral blades. When the stirring head rotates in the hole, the spiral blades on the stirring head play a major stirring role. When the diameter of the hole is too large, the spiral blades are not enough to meet the entire hole. At this time, the moving component is started to drive one end of the stirring rod located in the stirring head to move up, and the lever is used to move away, and the stirring rod as a whole rotates on the stirring head, so that the other end of the stirring rod rotates downward, that is, the stirring rod gradually moves away from the stirring head, so that the end of the stirring rod extends out of the range of the spiral blades to fill the distance between the stirring blades and the inner wall of the hole, that is, when the stirring head rotates, the stirring rod can mix the curing agent and the fluidized clay between the spiral blades and the inner wall of the hole, so as to achieve full mixing of the curing agent and the fluidized clay in the hole, and at the same time enable the stirring head to adapt to holes of different sizes, and have better applicability.
[0017] Optionally, the moving assembly includes an electric push rod, a push spring, a connecting block and a moving plate, the electric push rod is arranged in the stirring head, the electric push rod is connected to the connecting block through the push spring, the connecting block is fixed to the moving plate, the electric push rod can drive the connecting block to drive the moving plate to move up and down, a plurality of moving grooves are opened on the moving plate along the radial direction of the moving plate, one end of the stirring rod is inserted in the moving groove and can move in the moving groove.
[0018] By adopting the above technical solution, the electric push rod is started, the push spring is driven to drive the connecting block to move upward, thereby driving the movable plate to move upward, so as to change the height of one end of the stirring rod, while the height of the connection between the stirring rod and the stirring head remains unchanged, and the length of the stirring rod is fixed, so that the position of the end of the stirring rod in the horizontal direction changes synchronously, that is, one end of the stirring rod slides in the moving groove along the length direction of the moving groove, so that the stirring rod rotates, thereby completing the opening of several stirring rods.
[0019] Optionally, a swing component is provided in the stirring head, and the swing component is connected to the moving plate and is used to drive the moving plate to continuously squeeze the push spring.
[0020] By adopting the above technical solution, when the mixing head rotates, the swing assembly is started to drive the moving plate to move up and down, while the electric push rod does not work at this time, so that the position of the electric push rod is fixed, so that the final moving plate can only squeeze the push spring to move in the vertical direction, while driving the mixing rod to rotate, and the rotation range of the mixing rod is only the extension length of the push spring, thereby driving the mixing rod to swing back and forth at a small angle, realizing the shaking of several mixing rods, thereby stirring the curing agent and fluidized clay at the edge of the mixing head, and completing the full mixing of the curing agent and fluidized clay in the entire hole.
[0021] Optionally, the swing assembly includes a moving block and a moving crown tooth, the moving block is fixed to the moving plate, a telescopic rod is provided in the stirring head, the top end of the telescopic rod is passed through the stirring head and is coaxially fixed to the mounting rod, the bottom end of the telescopic rod is fixed with the moving crown tooth, the moving block is meshed with the moving crown tooth, and the stirring head rotates to drive the moving block to move on the moving crown tooth, thereby driving the moving plate to move up and down.
[0022] By adopting the above technical solution, the telescopic rod with the mobile crown teeth is pressed on the mobile plate by its own gravity, that is, the mobile block presses against the mobile crown teeth. When the stirring head rotates, the mobile plate is connected to the stirring rod, thereby rotating synchronously, but the mounting rod is fixed, that is, the telescopic rod and the mobile crown teeth are fixed, so that the mobile block moves on the tooth surface of the mobile crown teeth along the circumferential direction of the mobile crown teeth. In this process, the gravity of the telescopic rod and the mobile crown teeth overcomes the elastic force of the push spring, so that the telescopic rod will not be extended or retracted, that is, the height of the mobile crown teeth remains unchanged, so that the mobile block moves up and down along the tooth surface of the mobile crown teeth, and the push spring is continuously compressed and restored, so that the mobile plate moves up and down within the deformation stroke of the push spring, thereby realizing the shaking of the stirring rod.
[0023] Optionally, the stirring head is provided with a plurality of rotating rods, the rotating rods are provided with stirring blades, a rotating gear is coaxially fixed on the rotating rods, a rotating crown tooth is coaxially fixed on the telescopic rod, and the rotating crown tooth is meshed with the rotating gear.
[0024] By adopting the above technical solution, when the mounting sleeve drives the stirring head to rotate, the rotating rod synchronously revolves around the central axis of the mounting rod, while the telescopic rod is fixed, so that the rotating crown teeth will not rotate, thereby causing the rotating gear to move along the circumferential direction of the rotating crown teeth, and then causing the rotating gear to rotate, thereby realizing the self-rotation of the rotating rod, driving the stirring blades to rotate, and expanding the stirring range.
[0025] Optionally, the rotating rod is hinged on the mixing head, a connecting rod is fixed on the output rod of the electric push rod, a sleeve is sleeved on the rotating rod, a connecting groove is opened on the side wall of the sleeve along the length direction of the rotating rod, and the end of the connecting rod is inserted in the connecting groove and can move in the connecting groove.
[0026] By adopting the above technical solution, when the electric push rod moves up and down, the connecting rod is driven to move synchronously, so that the end of the connecting rod moves in the connecting groove, thereby driving the rotating rod to swing.
[0027] When the electric push rod drives the moving plate to be horizontal, the stirring rod is opened to the limit range, that is, the diameter of the stirring rod is the largest at this time. In this state, the stirring head rotates, and the stirring rod is the main stirring tool, while the spiral blade plays a smaller role. When the electric push rod drives the moving plate to be horizontal, the connecting rod also makes the sleeve horizontal, so that the rotating gear on the rotating rod meshes with the rotating crown gear, thereby realizing self-rotation, helping the stirring rod to stir and mix the curing agent and fluidized clay in the hole, and the rotating rod will only rotate and play an auxiliary role when the stirring rod is turned to the horizontal state to act as the main stirring tool.
[0028] In the second aspect, the present application provides a method for strengthening the foundation using a deep mixing device, which adopts the following technical solution: S1. Determine the scope of the reinforcement area, mark the location of each reinforcement point according to the design plan, and use a lightweight drilling machine to drill holes of suitable diameter at the designated location; S2. Assemble and inspect the deep mixing equipment to ensure that all parts are firmly connected and leak-free; S3, slowly send the mixing head into the drilled hole, turn on the high-pressure nozzle, and spread the curing agent into the hole; S4. Start the motor to drive the mixing head to rotate clockwise, and slowly rise until it completely exits the ground. During this period, the high-pressure nozzle is kept supplying slurry at a uniform speed to avoid local over-concentration or over-thinness; S5. After completing the construction of a single reinforcement point, shut down the machine and clean and maintain the equipment to prevent clogging by residual materials; S6. Repeat the operation procedures of S1 to S6 in sequence until the construction of all planned reinforcement points is completed.
[0029] In summary, the present application includes at least one of the following beneficial effects: 1. When the high-pressure nozzle moves around the mounting rod, it can move to the cam and move along the circumferential track of the cam before separating, so that the high-pressure nozzle can intermittently approach the inner wall of the hole, thereby increasing the impact force of the curing agent sprayed on the inner wall of the hole, making it easier to scrape the downstream plastic soil for mixing. At the same time, the high-pressure nozzle can be close to the inner wall of the hole, so that it can be adapted to spray holes with larger apertures, so as to prevent the high-pressure nozzle from affecting the uniformity of spraying due to the limited spraying distance, and has better applicability; 2. When the mixing head rotates, the swing assembly is started to drive the moving plate to move up and down, while the electric push rod does not work at this time, so that the position of the electric push rod is fixed, so that the final moving plate can only squeeze the push spring to move in the vertical direction, and at the same time drive the stirring rod to rotate, and the range of rotation of the stirring rod is only the telescopic length of the push spring, thereby driving the stirring rod to swing back and forth at a small angle, realizing the shaking of several stirring rods, thereby stirring the curing agent and fluidized clay at the edge of the mixing head, and completing the full mixing of the curing agent and fluidized clay in the entire hole. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] Figure 1 This is a schematic diagram of the structure of the deep mixing equipment of the embodiment of the present application; Figure 2 This is a structural cross-sectional view of the deep mixing device of an embodiment of the present application; Figure 3 for Figure 2 The enlarged view of point A in the middle; Figure 4 It is a structural schematic diagram of the connection relationship between the swing component and the moving component; Figure 5 It is a structural schematic diagram of the connection relationship on the rotating rod.
[0031] In the figure: 10, mounting rod; 11, mounting hole; 12, cam; 13, mounting ring; 20, mounting sleeve; 21, high-pressure nozzle; 30, driving assembly; 31, motor; 32, moving rod; 40, stirring head; 41, spiral blade; 50, stirring rod; 60, moving assembly; 61, electric push rod; 611, receiving groove; 612, connecting rod; 62, push spring; 63, connecting block; 64, moving plate; 641, moving groove; 70, swinging assembly; 71, moving block; 711, telescopic rod; 72, moving crown gear; 80, rotating rod; 81, sleeve; 811, connecting groove; 82, rotating gear; 83, stirring blade; 90, rotating crown gear. DETAILED DESCRIPTION
[0032] The following is combined with Figure 1-5 This application is described in further detail.
[0033] The present application embodiment discloses a deep stirring device. Figure 1 and Figure 2The deep mixing device includes a mounting rod 10, a mounting sleeve 20 and a mixing head 40. The mounting rod 10 is hollow inside, and a mounting hole 11 is formed on the side wall of the mounting rod 10. The mounting sleeve 20 is coaxially sleeved on the mounting rod 10, and the mounting hole 11 makes the mounting rod 10 and the mounting sleeve 20 communicate. A plurality of high-pressure nozzles 21 are installed on the mounting sleeve 20. The high-pressure nozzles 21 are realized by installing a high-pressure pump on the nozzles, so that the curing agent in the mounting rod 10 is sprayed out through the high-pressure nozzles 21. In the embodiment of the present application, the curing agent can be cement slurry or chemical substances such as lime and thermosetting resin.
[0034] Reference Figure 1 and Figure 2 , wherein a driving assembly 30 is provided on the mounting rod 10, and the driving assembly 30 is connected to the mounting sleeve 20, and is used to drive the mounting sleeve 20 to rotate when the mounting sleeve 20 is installed. The high-pressure nozzle 21 rotates synchronously, thereby expanding the spraying range. The mounting holes 11 are distributed along the circumference of the mounting rod 10, and a mounting ring 13 is sleeved on the mounting rod 10. The mounting ring 13 wraps the mounting ring 13, so that the mounting ring 13 is connected to the inside of the mounting rod 10 through the mounting hole 11, and the mounting ring 13 can rotate on the mounting rod 10. The high-pressure nozzle 21 is connected to the mounting ring 13 through a hose, so that the curing agent in the mounting rod 10 can enter the mounting ring 13 from the mounting hole 11, and then from the hose to the high-pressure nozzle 21, so as to realize the connection between the high-pressure nozzle 21 and the curing agent, which is convenient for the high-pressure nozzle 21 to spray the curing agent.
[0035] Reference Figure 1 and Figure 2 The stirring head 40 is coaxially fixed at the bottom end of the mounting sleeve 20. When in use, the mounting rod 10, the mounting sleeve 20 and the stirring head 40 are inserted into the hole, and then the driving assembly 30 is started to rotate the mounting sleeve 20 with the mounting rod 10 as the axis. At the same time, the mounting rod 10 is driven to move up slowly. During this process, the high-pressure nozzle 21 is opened synchronously to spray the curing agent into the hole, and the rotation and rise of the mounting sleeve 20 causes the high-pressure nozzle 21 to move up while performing a circular motion, forming a spiral path, thereby achieving stable and uniform spraying of the curing agent on the surrounding side of the hole to avoid local over-concentration or thinness.
[0036] While the high-pressure nozzle 21 is spraying the curing agent, the high pressure causes the sprayed curing agent to form a liquid knife, which scrapes off part of the fluidized soil on the inner wall of the hole. The rotation of the mounting sleeve 20 also causes the mixing head 40 to rotate synchronously, thereby achieving the mixing of the curing agent and the fluidized soil, making the curing agent more closely connected to the entire fluidized soil layer. The soil curing agent reacts with the components in the soil through the physical and chemical superposition effect and the excitation effect to form a strong composite material.
[0037] When the installation rod 10 is moved out of the hole, the spraying of the curing agent in the entire hole and the mixing of the curing agent and the fluidized soil in the hole are completed, and finally an artificial foundation column is formed in the hole, thereby achieving the purpose of strengthening the foundation.
[0038] Reference Figure 1 and Figure 2 A baffle is connected to the outer wall of the mounting sleeve 20 through a connecting spring, and the baffle is overlapped on the high-pressure nozzle 21. When the high-pressure nozzle 21 moves in the hole, it plays a protective role to prevent the soil from impacting and damaging the high-pressure nozzle 21. At the same time, the baffle also has a pressing effect on the high-pressure nozzle 21, pushing the high-pressure nozzle 21 toward the mounting rod 10, and a plurality of cams 12 are provided on the side wall of the mounting rod 10, and the high-pressure nozzle 21 can abut against the cams 12.
[0039] During the movement of the high-pressure nozzle 21 around the mounting rod 10, the high-pressure nozzle 21 can move to the cam 12, and move along the circumferential track of the cam 12 and then separate, so that the high-pressure nozzle 21 can intermittently approach the inner wall of the hole, thereby increasing the impact force of the curing agent sprayed on the inner wall of the hole, and facilitating the scraping of the downstream plastic soil for mixing. At the same time, the high-pressure nozzle 21 can approach the inner wall of the hole, so that it can adapt to spraying holes with larger apertures, so as to prevent the high-pressure nozzle 21 from affecting the uniformity of spraying due to the limited spraying distance, and the applicability is better.
[0040] Reference Figure 1 and Figure 2 The driving assembly 30 includes a motor 31 and a moving rod 32. The motor 31 is installed at the top of the mounting rod 10. The moving rod 32 is an L-shaped rod. One end of the moving rod 32 is fixed to the output end of the motor 31, and the other end is connected to the mounting sleeve 20. When the motor 31 is started, the moving rod 32 is driven to rotate with the mounting rod 10 as the axis, thereby driving the mounting sleeve 20 to rotate.
[0041] Reference Figure 1 and Figure 2 In order to improve the mixing efficiency of the mixing head 40, a spiral blade 41 is provided on the side wall of the mixing head 40, and the threaded blade is fixed to the mixing head 40. When the mixing head 40 rotates with the spiral blade 41, the spiral blade 41 generates forced convection and shear force through rotation, so that the curing agent and the fluidized soil form a circulation flow in the hole, thereby achieving efficient and sufficient mixing, improving work efficiency, and ensuring the quality of the foundation pile.
[0042] Reference Figure 2 and Figure 3In order to further increase the sufficiency of stirring, a plurality of stirring rods 50 are hinged on the side wall of the stirring head 40, and the plurality of stirring rods 50 are arranged at intervals along the circumference direction of the stirring head 40. A moving assembly 60 is provided in the stirring head 40. The moving assembly 60 includes an electric push rod 61, a push spring 62, a connecting block 63 and a moving plate 64. The electric push rod 61 is installed in the stirring head 40. A receiving hole is provided at the top of the electric push rod 61. The push spring 62 is provided in the receiving hole. One end of the push spring 62 is fixed to the receiving hole, and the other end is fixed to the connecting block 63. The connecting block 63 and the moving plate 64 are fixed to the bottom wall. The moving plate 64 is arranged in the stirring head 40 in a horizontal state. The electric push rod 61 can drive the connecting block 63 to drive the moving plate 64 to move up and down. The receiving hole plays a limiting role, so that the push spring 62 is not easy to tilt and bend, causing the moving plate 64 to flip.
[0043] Reference Figure 2 and Figure 4 A plurality of moving grooves 641 are provided on the moving plate 64 along the radial direction of the moving plate 64 , that is, the plurality of moving grooves 641 are radially arranged with the center of the moving plate 64 as the center of the circle, and one end of the stirring rod 50 is inserted into the moving groove 641 and can move in the moving groove 641 .
[0044] In the initial state, the stirring rod 50 is upwardly close to the stirring head 40, and a notch is provided on the spiral blade 41 for the stirring rod 50 to be inserted. At this time, the stirring rod 50 is located within the range of the spiral blade 41. When the stirring head 40 rotates in the hole, the spiral blade 41 on the stirring head 40 plays a major stirring role. When the diameter of the hole is too large, the spiral blade 41 is not enough to fill the entire hole. At this time, the electric push rod 61 is started to drive the push spring 62 to drive the connecting block 63 to move upward, thereby driving the movable plate 64 to move upward, so as to change the height of one end of the stirring rod 50. The lever is moved away, and the stirring rod 50 rotates as a whole on the stirring head 40, so that the other end of the stirring rod 50 rotates downward, that is, the stirring rod 50 gradually moves away from the stirring head 40, so that the end of the stirring rod 50 extends out of the range of the spiral blade 41 to fill the distance between the stirring blades 83 and the inner wall of the hole, that is, when the stirring head 40 rotates, the stirring rod 50 can mix the curing agent and the fluidized clay between the spiral blade 41 and the inner wall of the hole, thereby achieving sufficient mixing of the curing agent and the fluidized clay in the hole, and at the same time enabling the stirring head 40 to adapt to holes of different sizes, with better applicability.
[0045] Reference Figure 3 and Figure 4In order to make full use of the function of the stirring rod 50, a swing assembly 70 is provided in the stirring head 40, and the swing assembly 70 includes a moving block 71 and a moving crown tooth 72. The moving block 71 is fixed on the moving plate 64. A telescopic rod 711 is provided in the stirring head 40. The telescopic rod 711 here is a sleeve structure in the prior art. The top end of the telescopic rod 711 passes through the stirring head 40 and is coaxially fixed with the mounting rod 10. The bottom end of the telescopic rod 711 is fixed with a moving crown tooth 72. The moving block 71 is meshed with the moving crown tooth 72.
[0046] The telescopic rod 711 carries the movable crown tooth 72 and is pressed on the movable plate 64 by its own gravity, that is, the movable block 71 presses against the movable crown tooth 72. When the stirring head 40 rotates, the movable plate 64 is connected to the stirring rod 50, thereby rotating synchronously, but the mounting rod 10 is fixed, that is, the telescopic rod 711 and the movable crown tooth 72 are fixed, so that the movable block 71 moves on the tooth surface of the movable crown tooth 72 along the circumferential direction of the movable crown tooth 72. During this process, the gravity of the telescopic rod 711 and the movable crown tooth 72 overcomes the elastic force of the push spring 62, so that the telescopic rod 711 does not extend or retract, that is, the height of the movable crown tooth 72 remains unchanged, so that the movable block 71 moves up and down along the tooth surface of the movable crown tooth 72, and the push spring 62 is continuously compressed and restored, so that the movable plate 64 moves up and down within the deformation stroke of the push spring 62, that is, the stirring rod 50 swings back and forth at a small angle, so that a plurality of stirring rods 50 are shaken, thereby stirring the curing agent and the fluidized clay at the edge of the stirring head 40, and completing the full mixing of the curing agent and the fluidized clay in the entire hole.
[0047] Reference Figure 2 and Figure 5 , a plurality of rotating rods 80 are also provided on the stirring head 40, the middle part of the rotating rod 80 is hinged on the stirring head 40, the plurality of rotating rods 80 are arranged along the circumference direction of the stirring head 40, and the rotating rods 80 are distributed between two adjacent stirring rods 50. A connecting rod 612 is fixed on the output rod of the electric push rod 61, a sleeve 81 is sleeved on the rotating rod 80, a connecting groove 811 is opened on the side wall of the sleeve 81 along the length direction of the rotating rod 80, and the end of the connecting rod 612 is inserted in the connecting groove 811 and can move in the connecting groove 811. When the electric push rod 61 moves up and down, the connecting rod 612 is driven to move synchronously, so that the end of the connecting rod 612 moves in the connecting groove 811, thereby driving the rotating rod 80 to swing.
[0048] Reference Figure 2 and Figure 5 A stirring blade 83 is fixed on the rotating rod 80 , a rotating gear 82 is coaxially fixed on the rotating rod 80 , a rotating crown gear 90 is coaxially fixed on the telescopic rod 711 , and the rotating crown gear 90 is meshed with the rotating gear 82 .
[0049] When the electric push rod 61 drives the moving plate 64 to be horizontal, the stirring rod 50 is opened to the limit range, that is, the diameter of the stirring rod 50 is the largest at this time. In this state, the stirring head 40 rotates, and the stirring rod 50 is the main stirring tool, while the spiral blade 41 plays a smaller role. When the electric push rod 61 drives the moving plate 64 to be horizontal, the connecting rod 612 also makes the sleeve 81 horizontal, so that the rotating gear 82 on the rotating rod 80 is engaged with the rotating crown gear 90, and the stirring head 40 drives the rotating rod 80 to move, so that the rotating gear 82 moves along the circumferential direction of the rotating crown gear 90, and then the rotating gear 82 rotates, realizing the self-rotation of the rotating rod 80, helping the stirring rod 50 to stir and mix the curing agent and the fluidized clay in the hole, and the rotating rod 80 will only rotate to play an auxiliary role when the stirring rod 50 is turned to the horizontal state to act as the main stirring tool.
[0050] The implementation principle of a deep mixing device and a method for foundation reinforcement using the same according to an embodiment of the present application is as follows: when in use, the mounting rod 10 together with the mounting sleeve 20 and the mixing head 40 are inserted into the hole, and then the driving assembly 30 is started to rotate the mounting sleeve 20 with the mounting rod 10 as the axis, and at the same time, the mounting rod 10 is driven to move up slowly. During this process, the high-pressure nozzle 21 is opened synchronously to spray the curing agent into the hole, and the rotation and rise of the mounting sleeve 20 causes the high-pressure nozzle 21 to move up while performing a circular motion, forming a spiral path, thereby achieving stable and uniform spraying of the curing agent on the surrounding side of the hole to avoid local over-concentration or thinness.
[0051] While the high-pressure nozzle 21 is spraying the curing agent, the high pressure causes the sprayed curing agent to form a liquid knife, which scrapes off part of the fluidized soil on the inner wall of the hole. The rotation of the mounting sleeve 20 also causes the mixing head 40 to rotate synchronously, thereby achieving the mixing of the curing agent and the fluidized soil, making the curing agent more closely connected to the entire fluidized soil layer. The soil curing agent reacts with the components in the soil through the physical and chemical superposition effect and the excitation effect to form a strong composite material.
[0052] When the installation rod 10 is moved out of the hole, the spraying of the curing agent in the entire hole and the mixing of the curing agent and the fluidized soil in the hole are completed, and finally an artificial foundation column is formed in the hole, thereby achieving the purpose of strengthening the foundation.
[0053] The present application also discloses a method for strengthening a foundation using a deep mixing device, comprising the following steps: S1. Determine the scope of the reinforcement area, mark the location of each reinforcement point according to the design plan, and use a lightweight drilling machine to drill holes of suitable diameter at the designated location; S2. Assemble and inspect the deep mixing equipment to ensure that all parts are firmly connected and leak-free; S3, slowly insert the stirring head 40 into the drilled hole, open the high-pressure nozzle 21, and spread the curing agent into the hole; S4, start the motor 31 to drive the mixing head 40 to rotate clockwise, and at the same time slowly rise until it completely exits the ground, during which the high-pressure nozzle 21 is kept supplying slurry at a uniform speed to avoid local over-concentration or over-thinness; S5. After completing the construction of a single reinforcement point, shut down the machine and clean and maintain the equipment to prevent clogging by residual materials; S6, repeat the operation flow of S1-S6 in sequence until the construction of all planned reinforcement points is completed. The above are all preferred embodiments of this application, and the protection scope of this application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of this application should be included in the protection scope of this application.
Claims
1. A deep mixing device, characterized in that: The invention comprises a mounting rod (10), a mounting sleeve (20) and a stirring head (40); the mounting rod (10) is hollow inside and is used to store a curing agent; a mounting hole (11) is provided through the side wall of the mounting rod (10); the mounting sleeve (20) is coaxially sleeved on the mounting rod (10); the mounting sleeve (20) is connected to the mounting rod (10) through the mounting hole (11); a driving assembly (30) for driving the mounting sleeve (20) to rotate is provided on the mounting rod (10); and a driving assembly (30) for driving the mounting sleeve (20) to rotate is provided on the mounting sleeve (20). A plurality of high-pressure nozzles (21) are arranged at intervals along the circumference direction of the mounting sleeve (20); the high-pressure nozzles (21) are used to spray the curing agent in the mounting sleeve (20) out of the mounting sleeve (20); the stirring head (40) is coaxially fixed to the bottom end of the mounting sleeve (20); a plurality of cams (12) are provided on the side wall of the mounting rod (10); the high-pressure nozzles (21) can abut against the cams (12) to drive the high-pressure nozzles (21) to move radially along the mounting rod (10).
2. The deep stirring device according to claim 1, characterized in that: The driving assembly (30) comprises a motor (31) and a moving rod (32); the motor (31) is arranged at the top end of the mounting rod (10); one end of the moving rod (32) is fixed to the output end of the motor (31), and the other end is connected to the mounting sleeve (20); the motor (31) drives the moving rod (32) to move, and is used to drive the mounting sleeve (20) to rotate with the mounting rod (10) as the axis.
3. The deep stirring device according to claim 1, characterized in that: A spiral blade (41) is provided on the side wall of the stirring head (40).
4. The deep stirring device according to claim 1, characterized in that: A plurality of stirring rods (50) are hingedly connected to the side wall of the stirring head (40), and the plurality of stirring rods (50) are arranged at intervals along the circumference direction of the stirring head (40). A moving assembly (60) is provided inside the stirring head (40), and the moving assembly (60) is connected to one end of the stirring rod (50) inserted into the stirring head (40), and is used to drive one end of the stirring rod (50) to move up and down, so as to change the rotation angle of the stirring rod (50).
5. The deep stirring device according to claim 4, characterized in that: The moving assembly (60) comprises an electric push rod (61), a push spring (62), a connecting block (63) and a moving plate (64); the electric push rod (61) is arranged in the stirring head (40); the electric push rod (61) is connected to the connecting block (63) through the push spring (62); the connecting block (63) is fixed to the moving plate (64); the electric push rod (61) can drive the connecting block (63) to drive the moving plate (64) to move up and down; a plurality of moving grooves (641) are provided on the moving plate (64) along the radial direction of the moving plate (64); one end of the stirring rod (50) is inserted into the moving groove (641) and can move in the moving groove (641).
6. The deep stirring device according to claim 5, characterized in that: The stirring head (40) is provided with a swing assembly (70), and the swing assembly (70) is connected to the moving plate (64) and is used to drive the moving plate (64) to continuously squeeze the push spring (62).
7. The deep stirring device according to claim 6, characterized in that: The swing assembly (70) comprises a moving block (71) and a moving crown tooth (72), wherein the moving block (71) is fixed on the moving plate (64), a telescopic rod (711) is arranged inside the stirring head (40), the top end of the telescopic rod (711) passes through the stirring head (40) and is coaxially fixed to the mounting rod (10), the bottom end of the telescopic rod (711) is fixed with the moving crown tooth (72), the moving block (71) is meshed with the moving crown tooth (72), and the stirring head (40) rotates to drive the moving block (71) to move on the moving crown tooth (72), so as to drive the moving plate (64) to move up and down.
8. The deep stirring device according to claim 7, characterized in that: The stirring head (40) is provided with a plurality of rotating rods (80), the rotating rods (80) are provided with stirring blades (83), a rotating gear (82) is coaxially fixed to the rotating rods (80), a rotating crown gear (90) is coaxially fixed to the telescopic rod (711), and the rotating crown gear (90) is meshed with the rotating gear (82).
9. The deep stirring device according to claim 8, characterized in that: The rotating rod (80) is hinged on the stirring head (40); a connecting rod (612) is fixed on the output rod of the electric push rod (61); a sleeve (81) is sleeved on the rotating rod (80); a connecting groove (811) is opened on the side wall of the sleeve (81) along the length direction of the rotating rod (80); the end of the connecting rod (612) is inserted into the connecting groove (811) and can move in the connecting groove (811).
10. A method for strengthening foundation using the deep mixing equipment according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Determine the scope of the reinforcement area, mark the location of each reinforcement point according to the design plan, and use a lightweight drilling machine to drill holes of suitable diameter at the designated location; S2. Assemble and inspect the deep mixing equipment to ensure that all parts are firmly connected and leak-free; S3, insert the stirring head (40) into the drilled hole, open the high-pressure nozzle (21), and spread the curing agent into the hole; S4, start the motor (31) to drive the stirring head (40) to rotate in the clockwise direction, and at the same time slowly rise until it completely exits the ground, during which the high-pressure nozzle (21) is kept supplying slurry at a uniform speed to avoid local over-concentration or thinness; S5. After completing the construction of a single reinforcement point, shut down the machine and clean and maintain the equipment to prevent clogging by residual materials; S6. Repeat the operation procedures of S1 to S6 in sequence until the construction of all planned reinforcement points is completed.