A mixing device for producing a ready-mixed fluidified soil and a method thereof

Abstract

The application discloses a kind of pre-mixed fluidified solidified soil production stirring device and method thereof, belong to pre-mixed fluidified solidified soil preparation technical field, including mounting seat, mounting seat is connected with main stirring tank body by support frame, main stirring tank body bottom is provided with pump-out pipeline, main stirring tank body is provided with floating type stirring assembly, main stirring tank body top is provided with control seat, control seat top is provided with multiple pre-stirring cylinder.The application in the stirring process of pre-mixed fluidified solidified soil, fluidified solidified soil in pre-stirring cylinder after stirring is transported to the main stirring tank body below by fluidity measuring hole on fluidity measuring disc, in this process, time is recorded by electric signal detection piece arranged on fluidity measuring hole, so that the fluidity of fluidified solidified soil made of different water content original pit soil is obtained, so that corresponding supplementary water can be added according to different fluidity, so as to ensure the fluidity quality of pre-mixed fluidified solidified soil.

Description

Technical Field

[0001] This invention relates to the field of premixed fluidized solidified soil preparation technology, and in particular to a mixing device and method for preparing premixed fluidized solidified soil. Background Technology

[0002] Premixed fluidized solidified soil is a type of engineering material that makes full use of the foundation soil and slag soil discarded after the excavation of slag pits and foundation pits, and disposes of the waste soil on site. After adding a certain proportion of special cementitious materials (solidifying agents), water and additives, it is mixed evenly through a series of processes and special machinery to form a self-flowing, self-compacting, and pumpable engineering material. After pouring or filling and curing, it solidifies into a new type of geotechnical engineering material with certain strength, impermeability and long-term stability. The main raw material for premixed flowable solidified soil is still the original pit soil in the foundation pit. Before mixing, the original pit soil is screened to remove larger particles, and then mixed with solidifying agent and water. Since the moisture content of the original pit soil in the foundation pit is different, adding water according to a fixed ratio will result in inconsistent quality of the final flowable solidified soil, which seriously affects the pumping effect and project quality. Furthermore, the current mixing method is to mix a large amount of flowable solidified soil together. It is difficult to mix evenly during the mixing process, and only a water-blocking layer can be formed locally. This will lead to unstable quality of backfill soil, affecting the safety and stability of the project structure. Summary of the Invention

[0003] The purpose of this invention is to solve the problems existing in the prior art, and to propose a mixing device and method for making premixed fluidized solidified soil.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A mixing device and method for producing premixed fluidized solidified soil includes a mounting base, a main mixing tank connected to the mounting base via a support frame, a pump outlet pipe at the bottom of the main mixing tank, a floating mixing assembly inside the main mixing tank, a control base above the main mixing tank, multiple premixing cylinders above the control base, a discharge port penetrating the control base at the bottom of each premixing cylinder, a flowability detection assembly on the control base, an admixture addition tank above the control base, and a flow controller connected to the flowability detection assembly on one side of the admixture addition tank. The support frame is connected to a stirring cover plate via a lifting device. The stirring cover plate is provided with a pre-stirring mixing component adapted to the pre-stirring cylinder. The stirring cover plate is also provided with a driving assembly for driving the pre-stirring mixing component. The flowability detection component includes an annular cavity formed within a control base. An annular switching control disk is rotatably disposed within the annular cavity. An adjustment switching component is disposed on the outer wall of the annular switching control disk. A flowability measuring disk adapted to the discharge port is disposed on the annular switching control disk. A flowability measuring hole is formed on the flowability measuring disk. An electrical signal detection element is disposed on the inner wall of the flowability measuring hole.

[0005] Preferably, the electrical signal detection device includes a timer and conductive bodies disposed on both sides of the flow measurement hole, wherein the conductive bodies are electrically connected to the timer.

[0006] Preferably, the floating stirring assembly includes a main stirring motor disposed in a mounting base, the output end of the main stirring motor extending into the main stirring tank and fixedly connected to an outer shaft, a fixed stirring element disposed on the outer shaft, a floating inner bushing movably disposed inside the outer shaft, a floating inner shaft body disposed inside the floating inner bushing, and telescopic stirring elements disposed on both the floating inner bushing and the floating inner shaft body, and rectangular openings provided on both the outer shaft and the floating inner bushing for the telescopic stirring elements to move.

[0007] Preferably, the telescopic mixing component includes an inner fixed column, on which a mixing horizontal column is sleeved, the mixing horizontal column and the inner fixed column are connected by an abutment spring, a mixing blade is provided on the outer wall of the mixing horizontal column, and an inclined abutment ball is provided at the end of the mixing horizontal column.

[0008] Preferably, a spray pipe is provided on the top of the control base, and the spray pipe is connected to the bottom of the admixture addition tank through a valve. An electric push rod is provided on the top of the admixture addition tank, and a hydraulic piston is connected to the output end of the electric push rod.

[0009] Preferably, multiple flow controllers are provided, each connected to an external water supply pipe, and each flow controller corresponds to an electric signal detection device.

[0010] Preferably, the driving assembly includes a driving motor mounted on the stirring cover plate, the pre-stirring mixing component is connected to a stirring gear via a rotating shaft, the output end of the driving motor is fixedly mounted with a driving gear, and a transmission gear ring is rotatably mounted on the stirring cover plate.

[0011] Preferably, the adjustment and switching assembly includes an adjustment motor disposed on the side wall of the main mixing tank, an adjustment gear fixedly connected to the output end of the adjustment motor, an adjustment external gear ring fixedly disposed on the outer side wall of the annular switching control disk, and the adjustment gear part being located in the annular cavity and meshing with the adjustment external gear ring.

[0012] Preferably, the main mixing tank is composed of an upper inclined funnel body and a bottom straight body.

[0013] A method for manufacturing a mixing device for premixed fluidized solidified soil specifically includes the following steps: S1. Sampling by region: Select a predetermined amount of original pit soil at the location of the foundation pit within the same region, and sieve the original pit soil. S2. Regional pre-mixing: The original pit soil and solidifying agent in the same area are put into the pre-mixing drum according to a fixed mass ratio and mixed by the pre-mixing mixing device. A fixed mass ratio of water is added during the mixing process to form pre-treated solidified soil. S3, Regional Flowability Detection: The control opens the ring switching control panel set on the control base, causing the flowability measuring disc on it to rotate to the discharge port. The pre-treated solidified soil in the pre-mixing drum will flow downward through the flowability measuring hole on the flowability measuring disc. During the flow process, the flow time is calculated by the electrical signal detection device. S4. Makeup water mixed with admixture: The time interval is determined according to the time recorded by different electrical signal detection devices. The flow controller controls the output of makeup water corresponding to the time interval and injects the makeup water into the admixture addition tank to form admixture liquid. S5. Centralized mixing: The pretreated solidified soil is continuously mixed by a fixed mixing element and a telescopic mixing element. During the mixing process, the liquid admixture in the admixture addition tank is injected into the pretreated solidified soil for mixing, forming premixed fluidized solidified soil.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the mixing process of premixed fluidized solidified soil, the present invention premixes original pit soil with different moisture contents from different regions in a premixing drum, and then transports the fluidized solidified soil in the premixing drum to the main mixing tank below through the fluidity measuring hole on the fluidity measuring plate. During this process, the time is recorded by an electrical signal detection device set on the fluidity measuring hole, thereby obtaining the fluidity of the fluidized solidified soil made from original pit soil with different moisture contents. This allows for the addition of corresponding supplementary water according to different fluidities, thereby ensuring the fluidity quality of the premixed fluidized solidified soil.

[0015] 2. In the centralized mixing process, the present invention uses telescopic mixing components set on the floating inner and outer shafts. These telescopic mixing components gradually float upwards under the action of the flowing solidified soil. This allows multiple mixing blades to be mixed together in a concentrated manner according to the different mixing heights of the flowing solidified soil, which significantly improves the mixing efficiency. Attached Figure Description

[0016] Figure 1 This is a structural assembly diagram of a mixing device for manufacturing premixed fluidized solidified soil proposed in this invention; Figure 2 for Figure 1 Enlarged structural diagram at point A; Figure 3 This is a schematic diagram of the main structure of a mixing device for making premixed fluidized solidified soil according to the present invention; Figure 4 This is a schematic diagram of the structure of each component on the mixing cover plate in the mixing device for making premixed fluidized solidified soil proposed in this invention; Figure 5 This is a schematic diagram of the floating mixing component in a mixing device for making premixed fluidized solidified soil according to the present invention. Figure 6 This is an assembly diagram of the admixture addition tank in a mixing device for producing premixed fluidized solidified soil according to the present invention; Figure 7 This is a cross-sectional schematic diagram of the telescopic mixing component in a mixing device for making premixed fluidized solidified soil according to the present invention. Figure 8 This is a flowchart of a method for preparing a mixing device for premixed fluidized solidified soil according to the present invention.

[0017] In the diagram: 1. Main mixing tank; 2. Pump outlet pipe; 3. Control base; 4. Pre-mixing drum; 5. Discharge port; 6. Additive addition tank; 7. Flow controller; 8. Lifting device; 9. Mixing cover plate; 10. Pre-mixing component; 11. Annular switching control panel; 12. Flowability measuring panel; 13. Flowability measuring hole; 14. Fixed mixing component; 15. Conductor; 16. Main mixing motor; 17. Outer shaft; 18. Floating inner bushing; 19. Floating inner shaft; 20. Inner fixed column; 21. Mixing cross column; 22. Mixing blade; 23. Inclined contact ball; 24. Spray pipe; 25. Electric push rod; 26. Hydraulic piston; 27. Drive motor; 28. Transmission gear ring; 29. ​​Adjusting motor; 30. Adjusting gear; 31. Adjusting outer gear ring. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0019] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] Example, refer to Figures 1 to 8 A mixing device and method for making premixed fluidized solidified soil includes a mounting base. The mounting base is connected to a main mixing tank 1 via a support frame. The main mixing tank 1 consists of an upper inclined funnel body and a bottom straight body. The structure of the main mixing tank facilitates the delivery of the internal fluidized solidified soil to the bottom pump outlet pipe 2 under the action of gravity, which is convenient for final pumping. A pump outlet pipe 2 is provided at the bottom of the main mixing tank 1, and a floating mixing assembly is provided inside the main mixing tank 1. Further, the floating mixing assembly includes a main mixing motor 16 installed in the mounting base. The output end of the main mixing motor 16 extends upward through the pump outlet pipe 2 and extends into the main mixing tank 1, and is fixedly connected to an outer sleeve shaft 17. A fixed mixing element 14 is provided on the outer sleeve shaft 17. The fixed mixing element 14 and the telescopic mixing element have the same structure. A floating inner bushing 18 is movably installed inside the outer sleeve shaft 17. A floating inner shaft body 19 is provided inside the floating inner bushing 18. Telescopic mixing elements are provided on both the floating inner bushing 18 and the floating inner shaft body 19. A rectangular opening is provided on both the outer sleeve shaft 17 and the floating inner bushing 18 for the telescopic mixing element to move.

[0022] It should be noted that the sliding between the floating inner bushing 18 and the outer bushing 17 is provided with a limiting structure. The limiting structure is the common keyway and slide key fit, which is existing technology, in order to prevent the floating inner bushing 18 and the outer bushing 17 from disengaging.

[0023] Furthermore, the telescopic mixing component includes an inner fixed column 20, on which a mixing horizontal column 21 is fitted. The mixing horizontal column 21 and the inner fixed column 20 are connected by a contact spring. The mixing horizontal column 21 has a telescopic groove adapted to the inner fixed column 20, allowing the inner fixed column 20 to telescopically move. A mixing blade 22 is provided on the outer wall of the mixing horizontal column 21, and an inclined contact ball 23 is provided at the end of the mixing horizontal column 21. The inclined contact ball 23 contacts the inner wall of the main mixing tank 1. The inclined contact ball 23 reduces the friction between the mixing horizontal column 21 and the side wall of the main mixing tank 1.

[0024] It should be noted that the mixing cross column 21 and its inner fixed column 20 are both made of materials with good buoyancy. Under the action of the flowing solidified soil, they will gradually float upward, so that multiple mixing blades 22 can be mixed together according to different mixing heights of the flowing solidified soil. Concentrated mixing can significantly improve mixing efficiency. When the buoyancy of the fluidized solidified soil causes the telescopic mixing component on the floating inner bushing 18 and floating inner shaft 19 to float from the bottom of the main mixing tank 1 to the upper inclined funnel body, the inner diameter of the main mixing tank 1 gradually increases. During the increase, the mixing column 21 will gradually extend outward under the restoring force of the resisting spring, thereby ensuring effective mixing of the fluidized solidified soil in the main mixing tank 1.

[0025] A control base 3 is provided above the main mixing tank 1. Multiple pre-mixing cylinders 4 are provided above the control base 3. The bottom of the pre-mixing cylinder 4 has a discharge port 5 that penetrates the control base 3. A flowability detection component is provided on the control base 3. An admixture addition tank 6 is provided above the control base 3. Furthermore, a spray pipe 24 is provided on the top of the control base 3. The spray pipe 24 is connected to the bottom of the admixture addition tank 6 through a valve. The valve is existing technology and will not be described in detail here. An electric push rod 25 is provided on the top of the admixture addition tank 6. A hydraulic piston 26 is connected to the output end of the electric push rod 25.

[0026] A flow controller 7 connected to the flowability detection component is provided on one side of the admixture addition tank 6. There are multiple flow controllers 7, each connected to a water addition pipe. Each flow controller 7 corresponds to an electric signal detection component. The annular switching control panel 11 is equipped with a flowability measuring panel 12 adapted to the discharge port 5. The flowability measuring panel 12 has a flowability measuring hole 13. An electrical signal detection element is provided on the inner wall of the flowability measuring hole 13. The electrical signal detection element includes a timer and conductive bodies 15 arranged on both sides of the flowability measuring hole 13. The conductive bodies 15 are electrically connected to the timer.

[0027] It should be noted that when the flowability measuring plate 12 is at the discharge port 5, the fluidized solidified soil, after being stirred in the pre-mixing drum 4, will automatically flow downwards from the flowability measuring hole 13 set on the flowability measuring plate 12 under the action of flowability. At this time, the fluidized solidified soil will cause the conductors 15 on both sides to be connected to transmit electrical signals. The time it takes for the fluidized solidified soil to flow to the bottom is obtained by a timer based on the duration of the electrical signal, thereby obtaining the flowability performance of the fluidized solidified soil. When the flowability is poor, the required time is longer. Based on calculation or experiment, a certain time interval is selected to set a certain amount of replenishing water. When the time is within this interval, the flow controller 7 can be controlled to provide a predetermined amount of replenishing water, thereby ensuring that the overall flowability of the fluidized solidified soil in the main mixing tank 1 meets the predetermined requirements.

[0028] A mixing cover plate 9 is connected to the support frame via a lifting device 8. The lifting device 8 can be configured as a lifting hydraulic cylinder, which is existing technology and will not be described in detail here. A pre-mixing component 10 adapted to the pre-mixing drum 4 is provided on the mixing cover plate 9. A drive assembly for driving the pre-mixing component 10 is provided on the mixing cover plate 9. The drive assembly includes a drive motor 27 provided on the mixing cover plate 9. The pre-mixing component 10 is connected to a mixing gear via a rotating shaft. A drive gear is fixedly provided at the output end of the drive motor 27. A transmission gear ring 28 is rotatably provided on the mixing cover plate 9. The drive motor 27 drives multiple pre-mixing components 10 to rotate, thereby achieving effective mixing of the pretreated solidified soil in the pre-mixing drum 4.

[0029] The flowability detection component includes an annular cavity opened in the control seat 3. An annular switching control disk 11 is rotatably arranged in the annular cavity. The annular switching control disk 11 is rotatably connected in the annular cavity by bearings. An adjustment switching component is arranged on the outer wall of the annular switching control disk 11. Further, the adjustment switching component includes an adjustment motor 29 arranged on the side wall of the main mixing tank 1. An adjustment gear 30 is fixedly connected to the output end of the adjustment motor 29. An adjustment external gear ring 31 is fixedly arranged on the outer wall of the annular switching control disk 11. The adjustment gear 30 is partially located in the annular cavity and meshes with the adjustment external gear ring 31. During adjustment, the adjustment motor 29 is turned on to drive the adjustment gear 30 connected to its output end to rotate. The adjustment external gear ring 31, which is meshed with the adjustment gear 30, will drive the annular switching control disk 11 to rotate, thereby causing the flow measurement disk 12, which was originally misaligned with the discharge port 5, to move. When the flow measurement disk 12 moves to the discharge port 5, the flow will be turned on.

[0030] When manufacturing premixed fluidized solidified soil using a mixing device, the present invention first selects a predetermined mass of original pit soil from the foundation pit location in the same area and sieves the original pit soil; the original pit soil and solidifying agent in the same area are added into the premixing drum 4 according to a fixed mass ratio and stirred by the premixing mixing component 10. During the stirring process, a fixed mass ratio of water is added to form pretreated solidified soil. The control is activated by the ring switching control panel 11 on the control base 3, which rotates the flowability measuring panel 12 to the discharge port 5. The pre-treated solidified soil in the pre-mixing drum 4 will flow downward through the flowability measuring hole 13 on the flowability measuring panel 12. During the flow, the flow time is calculated by the electrical signal detection device. The time interval is determined by the time recorded by different electrical signal detection devices. The flow controller 7 controls the output of the replenishing water corresponding to the time interval and injects the replenishing water into the admixture addition tank 6 to form admixture liquid. The pretreated solidified soil is continuously stirred by the fixed mixing element 14 and the telescopic mixing element. During the stirring process, the liquid admixture in the admixture addition tank 6 is injected into the pretreated solidified soil for mixing, forming premixed fluidized solidified soil.

[0031] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A mixing device for producing premixed fluidized solidified soil, comprising a mounting base, characterized in that, The mounting base is connected to the main mixing tank (1) via a support frame. The bottom of the main mixing tank (1) is provided with a pump outlet pipe (2). A floating mixing component is provided inside the main mixing tank (1). A control seat (3) is provided above the main mixing tank (1). Multiple pre-mixing cylinders (4) are provided above the control seat (3). A discharge port (5) penetrating the control seat (3) is provided at the bottom of the pre-mixing cylinder (4). A flowability detection component is provided on the control seat (3). An admixture addition tank (6) is provided above the control seat (3). A flow controller (7) connected to the flowability detection component is provided on one side of the admixture addition tank (6). The support frame is connected to a stirring cover plate (9) via a lifting device (8). The stirring cover plate (9) is provided with a pre-stirring mixing component (10) adapted to the pre-stirring cylinder (4). The stirring cover plate (9) is provided with a driving component for driving the pre-stirring mixing component (10). The flowability detection component includes an annular cavity opened in the control seat (3), an annular switching control disk (11) is rotatably arranged in the annular cavity, an adjustment switching component is arranged on the outer wall of the annular switching control disk (11), a flowability measuring disk (12) adapted to the discharge port (5) is arranged on the annular switching control disk (11), a flowability measuring hole (13) is opened on the flowability measuring disk (12), and an electrical signal detection element is arranged on the inner wall of the flowability measuring hole (13).

2. The mixing device for producing premixed fluidized solidified soil according to claim 1, characterized in that, The electrical signal detection device includes a timer and conductors (15) disposed on both sides of the flow measurement hole (13), wherein the conductors (15) are electrically connected to the timer.

3. The mixing device for producing premixed fluidized solidified soil according to claim 1, characterized in that, The floating stirring assembly includes a main stirring motor (16) installed in the mounting base. The output end of the main stirring motor (16) extends into the main stirring tank (1) and is fixedly connected to an outer shaft (17). A fixed stirring element (14) is provided on the outer shaft (17). A floating inner bushing (18) is movably installed inside the outer shaft (17). A floating inner shaft body (19) is provided inside the floating inner bushing (18). Telescopic stirring elements are provided on both the floating inner bushing (18) and the floating inner shaft body (19). A rectangular opening is provided on both the outer shaft (17) and the floating inner bushing (18) for the telescopic stirring elements to move.

4. The mixing device for producing premixed fluidized solidified soil according to claim 3, characterized in that, The telescopic mixing component includes an inner fixed column (20), on which a mixing cross column (21) is sleeved. The mixing cross column (21) and the inner fixed column (20) are connected by a contact spring. A mixing blade (22) is provided on the outer wall of the mixing cross column (21), and an inclined contact ball (23) is provided at the end of the mixing cross column (21).

5. The mixing device for producing premixed fluidized solidified soil according to claim 1, characterized in that, The top of the control base (3) is provided with a spray pipe (24), which is connected to the bottom of the admixture addition tank (6) through a valve. The top of the admixture addition tank (6) is provided with an electric push rod (25), and the output end of the electric push rod (25) is connected to a hydraulic piston (26).

6. The mixing device for producing premixed fluidized solidified soil according to claim 1, characterized in that, Multiple flow controllers (7) are provided, each with an external water supply pipe. Each flow controller (7) corresponds to an electrical signal detection device.

7. The mixing device for producing premixed fluidized solidified soil according to claim 1, characterized in that, The drive assembly includes a drive motor (27) mounted on the stirring cover plate (9), the pre-stirring mixing component (10) is connected to a stirring gear via a rotating shaft, the output end of the drive motor (27) is fixedly mounted with a drive gear, and a transmission gear ring (28) is rotatably mounted on the stirring cover plate (9).

8. The mixing device for producing premixed fluidized solidified soil according to claim 1, characterized in that, The adjustment and switching assembly includes an adjustment motor (29) installed on the side wall of the main mixing tank (1). An adjustment gear (30) is fixedly connected to the output end of the adjustment motor (29). An adjustment external gear ring (31) is fixedly installed on the outer side wall of the annular switching control disk (11). The adjustment gear (30) is partially located in the annular cavity and meshes with the adjustment external gear ring (31).

9. The mixing device for producing premixed fluidized solidified soil according to claim 1, characterized in that, The main mixing tank (1) consists of an upper inclined funnel body and a bottom straight body.

10. A method for preparing a mixing device for premixed fluidized solidified soil according to claim 3 or 4, characterized in that, Specifically, the following steps are included: S1. Sampling by region: Select a predetermined amount of original pit soil at the location of the foundation pit within the same region, and sieve the original pit soil. S2, Regional pre-mixing: The original pit soil and solidifying agent in the same area are put into the pre-mixing drum (4) according to a fixed mass ratio and mixed by the pre-mixing mixing component (10). A fixed mass ratio of water is added during the mixing process to form pre-treated solidified soil. S3, Regional flowability detection: The control opens the ring switching control disk (11) set on the control seat (3), so that the flowability measuring disk (12) on it rotates to the discharge port (5). The pre-treated solidified soil in the pre-mixing drum (4) will flow downward through the flowability measuring hole (13) on the flowability measuring disk (12). During the flow, the flow time is calculated by the electrical signal detection device. S4, Adding water and admixture: Determine the time interval based on the time recorded by different electrical signal detection devices, control the output of the added water corresponding to the time interval through the flow controller (7), and inject the added water into the admixture addition tank (6) to form admixture liquid; S5. Centralized mixing: The pretreated solidified soil is continuously mixed by a fixed mixing element (14) and a telescopic mixing element. During the mixing process, the liquid additive in the additive addition tank (6) is injected into the pretreated solidified soil for mixing to form premixed fluidized solidified soil.

Images