A device for preparing fluidized solidified soil for foundation pit backfilling and a backfilling method

Abstract

The present invention discloses a device for preparing fluidized solidified soil for foundation pit backfilling and a backfilling method, including a transport vehicle. Above the transport vehicle, a water supply component, a curing agent storage chamber, a curing agent slurry preparation chamber, a crushing component and a preparation component are provided. The water supply component is connected to the curing agent slurry preparation chamber and the preparation component through pipelines. The curing agent storage chamber is connected to the curing agent slurry preparation chamber through a curing agent raw material delivery pipe. The crushing component is arranged above the preparation component. A screening component is also included, which is arranged above the transport vehicle and connected to the crushing component; the screening component includes a screen, a support skeleton and a material sliding plate connected up and down. An eccentric vibration motor is arranged on the bottom surface of the material sliding plate. A feeder is also included; inside the preparation component, a stirring chamber and a product storage chamber are arranged. The stirring chamber includes a stirring chamber outer shell. At the central position inside the stirring chamber outer shell, a stirring drum is arranged. An electric motor is arranged inside the stirring drum, and a stirring drum housing is fixed outside the stirring drum.

Description

Technical Field

[0001] The present invention relates to the technical field of slurry mixing, and particularly relates to a device for preparing fluidized solidified soil for foundation pit backfilling and a backfilling method. Background Art

[0002] During the construction of foundation pit backfilling in many projects, challenges such as narrow backfilling space, large backfilling depth, unstable compaction quality of backfill soil, and high quality requirements for backfill soil are often faced. In recent years, with the increasing number of deep foundation pit support projects, accidents frequently occur where settlement damage occurs in parts such as building aprons, pipelines, and access roads due to insufficient compaction of backfill soil, thereby affecting their service functions. Fluidized solidified soil is a new type of building material specifically studied and innovatively developed to address the above problems.

[0003] However, there are some technical problems in the preparation and application of current fluidized solidified soil. Firstly, the transportation cost of raw materials is relatively high, especially when the raw material sources are far away, which increases the overall project cost. Secondly, large-sized stones and soil blocks are often contained in the raw materials, and these impurities will affect the uniformity and stability of the fluidized solidified soil, thereby reducing its quality. In addition, there are also high costs in the transportation process of fluidized solidified soil, mainly due to its special fluidity and requirements for transportation conditions. Therefore, how to reduce the transportation costs of raw materials and fluidized solidified soil, and how to effectively handle large-sized stones and soil blocks in the raw materials are the key problems that need to be solved in the current fluidized solidified soil technology.

[0004] For example, in the invention patent "Movable Fluidized Solidified Soil Production and Transport Vehicle", the application number is: 202410211659.5. By mounting a storage tank and a mixing tank on the vehicle body to prepare fluidized solidified soil, the transportation cost is saved, but it cannot handle construction waste, and the prepared fluidized solidified soil has poor uniformity and stability, and cannot be continuously prepared, affecting the project progress; based on the characteristics of fluidized solidified soil, a specific backfilling method is required during foundation pit backfilling. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems raised in the above background art, and then a device for preparing fluidized solidified soil for foundation pit backfilling and a backfilling method are proposed. The disclosed device of the present invention filters large-sized stones and soil blocks through a screening component with a pore size of 50 mm to obtain soil materials that meet the standards of "Technical Standard for Application of Fluidized Solidified Soil" T / SDSZ 8 - 2023, avoiding complex crushing processes, reducing costs, and improving the uniformity and stability of the fluidized solidified soil; by setting a product storage compartment to store the prepared fluidized solidified soil therein, the fluidized solidified soil can be output while being prepared, improving work efficiency.

[0006] The technical solution adopted by the present invention to solve its technical problems is:

[0007] A device and method for preparing fluidized solidified soil for foundation pit backfilling, including a transport vehicle. Above the transport vehicle, there are a water supply component, a curing agent storage chamber, a curing agent slurry preparation chamber, a crushing component, and a preparation component. The water supply component is connected to the curing agent slurry preparation chamber and the preparation component through pipelines. The curing agent storage chamber is connected to the curing agent slurry preparation chamber through a curing agent raw material delivery pipe. The crushing component is arranged above the preparation component. With the device disclosed in the present invention, fluidized solidified soil can be prepared on the construction site, saving raw materials and the transportation cost of fluidized solidified soil, adding raw materials according to the on-site backfilling situation to avoid waste. It also includes a screening component, which is arranged above the transport vehicle and connected to the crushing component. Although the screened soil materials already meet the standards of the "Technical Standard for the Application of Fluidized Solidified Soil", they still need to be further crushed. One is to avoid the high moisture content of the soil materials and sticking together, and the other is to further crush the soil materials to improve the soil material standards, thereby improving the uniformity and stability of the fluidized solidified soil. The screening component includes a screen, a support skeleton, and a sliding plate connected in sequence from top to bottom. An eccentric vibration motor is fixedly arranged on the bottom surface of the sliding plate. The screening component is driven to vibrate by the eccentric vibrator to improve the screening rate and effect. It also includes a feeder. The horizontal section of the feeder is connected to the discharge end of the screen. Large-sized soil blocks and stones slide onto the horizontal section of the feeder on the upper surface of the screen and are sent to the rear of the transport vehicle by the feeder and transported away by workers. Inside the preparation component, there are a mixing chamber and a product storage chamber, which are connected through pipelines. The mixing chamber includes a mixing chamber outer shell. At the central position inside the mixing chamber outer shell, there is a mixing drum. The mixing blades below the mixing drum gradually become shorter from bottom to top and then remain unchanged. The diameter of the lower end of the mixing drum is equal to the inner diameter of the mixing chamber outer shell. There is a motor inside the mixing drum, and a mixing drum housing is fixed outside the mixing drum. The lower part of the mixing drum housing is designed with a hollow. When the mixing drum rotates, it can transport the mixture at the bottom of the mixing chamber to the upper part, and the mixture then freely falls from the upper part. The hollow design of the lower part of the mixing drum housing enables the mixture to re-enter the mixing blades below the mixing drum, and so on, making the mixture evenly mixed to produce high-quality fluidized solidified soil.

[0008] The soil materials excavated from the roadbed are mixed with various impurities inside. Only the soil materials with a particle size less than 50 mm are needed to prepare fluidized solidified soil. The excavated soil materials are large in quantity and low in cost. There is no need to spend a large amount of resources to grind large particle soil blocks and stones, and only strict screening needs to be done.

[0009] Preferably, the water supply component is provided with a water supply pipe. On the water supply pipe, a water supply pipe for the curing agent slurry preparation chamber and a water supply pipe for the mixing chamber are respectively fixedly arranged. The water supply pipe for the curing agent slurry preparation chamber is connected to the curing agent slurry preparation chamber, and the water supply pipe for the mixing chamber is connected to the first feed port arranged on the mixing chamber outer shell.

[0010] Preferably, the curing agent slurry preparation chamber further includes a curing agent conveying pipeline, one end of which is connected to the shell of the curing agent slurry preparation chamber, and the other end is connected to a second feed port provided on the outer shell of the stirring chamber.

[0011] Preferably, the preparation assembly further includes a solidified soil conveying pipeline, on which a storage chamber conveying pipeline and a stirring chamber conveying pipeline are respectively provided. The storage chamber conveying pipeline is connected to the product storage chamber, and the stirring chamber conveying pipeline is connected to a second discharge port provided on the outer shell of the stirring chamber. A first discharge port is also provided on the outer shell of the stirring chamber, and the first discharge port is connected to the product storage chamber through a pipeline. The fluidized solidified soil prepared in the stirring chamber will be preferentially stored in the product storage chamber and then transported from the product storage chamber to the position to be backfilled. During this period, the stirring chamber can continue to prepare the fluidized solidified soil, and this cycle can improve the working efficiency.

[0012] Preferably, the screening assembly further includes an auxiliary plate, which is fixed at the discharge end of the sliding plate. The other end of the auxiliary plate is inclined downward. The qualified soil materials filtered by the sieve mesh will fall onto the sliding plate and then slide from the sliding plate into the crushing assembly. The setting of the auxiliary plate can make the soil materials fall in the middle of the crushing assembly, avoiding the soil materials from sliding onto the vehicle body, avoiding the trouble of later cleaning, and reducing the labor intensity.

[0013] Preferably, a turning arc plate is provided above the stirring drum shell. The turning arc plate is narrow at the top and wide at the bottom, and the diameter of the lower end of the turning arc plate is smaller than the diameter of the lower end of the stirring drum. The turning arc plate can prevent the mixture from falling back and affecting the mixing effect of the mixture, and can also evenly disperse the mixture between the stirring drum shell and the outer shell of the stirring chamber.

[0014] Preferably, a plurality of mutually perpendicular and intersecting cross bars and longitudinal bars are fixedly arranged inside the support skeleton. Vertical bars are vertically arranged at the intersecting positions of the cross bars and longitudinal bars. The upper ends of the vertical bars are in contact with the bottom surface of the sieve mesh, and the lower ends of the vertical bars are in contact with the top surface of the sliding plate, supporting the sieve mesh to prevent the sieve mesh from sagging and deforming too much and damaging the sieve mesh.

[0015] Preferably, a funnel is provided below the crushing assembly, and the lower part of the funnel extends into the upper end of the outer shell of the stirring chamber. All the soil materials processed by the crushing assembly fall into the interior of the outer shell of the stirring chamber.

[0016] Preferably, the aperture of the sieve mesh is 50mm. The particle size of the soil materials specified in the "Technical Standard for the Application of Fluidized Solidified Soil" T / SDSZ 8-2023 is less than or equal to 50mm. Strict requirements are imposed on the screening to improve the uniformity and stability of the fluidized solidified soil and reduce the pressure on the crushing assembly at the same time.

[0017] A method for backfilling a foundation pit with fluidized solidified soil, comprising the following steps:

[0018] S1. Treat the bottom surface of the foundation pit, clean up sundries, and for soft foundations, replacement treatment shall be carried out according to specifications;

[0019] S2. The fluidized solidified soil needs to be poured in layers. The pouring thickness in the conventional area is ≤ 1.2 m, and the pouring thickness in the area with complex structure is ≤ 0.8 m. Moreover, in the area with complex structure, multi-point pouring and over-pouring are adopted. Multi-point pouring can effectively avoid the generation of holes. It is inevitable to generate holes inside the pouring in the area with complex structure. Under the action of the self-compaction of the fluidized solidified soil, the gas is discharged. Over-pouring can avoid the appearance of height differences on the upper surface. When pouring, follow the principle of from deep to shallow and from far to near;

[0020] S3. The outlet of the conveying pipeline of the fluidized solidified soil extends into the solidified soil or closely adheres to the upper surface of the solidified soil, effectively avoiding air from entering the interior of the solidified soil;

[0021] S4. After pouring, level the surface before final setting, reserve a drainage slope of 2% - 3%, and set drainage ditches according to the needs of the foundation pit points;

[0022] S5. After final setting, cover with geotextile + plastic film, and carry out moisture conservation for ≥ 7 days. When the environmental temperature < 5 °C, lay an additional heat preservation cotton quilt.

[0023] It should be noted that the disclosed device of the present invention can continuously prepare fluidized solidified soil at the backfilling site, without worrying about the problem of too long interval time for layered backfilling.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. The disclosed device of the present invention filters large-particle-size stones and soil blocks through a screening component with a pore size of 50 mm, and obtains soil materials that meet the standards of "Technical Standard for Application of Fluidized Solidified Soil" T / SDSZ 8 - 2023, avoiding complex crushing processes, reducing costs, and improving the uniformity and stability of the fluidized solidified soil; by setting a product storage chamber, storing the prepared fluidized solidified soil therein, it can output the fluidized solidified soil while preparing, improving work efficiency, and avoiding problems during the interval process of layered backfilling.

[0026] 2. The disclosed device of the present invention sets a stirring drum, enabling the mixture to move up and down repeatedly from bottom to top, and the mixture can be fully and evenly mixed, and the prepared fluidized solidified soil has good uniformity and stability.

[0027] 3. The disclosed device of the present invention sets an auxiliary plate at the lower end of the sliding plate. The qualified soil materials filtered from the sieve mesh will fall onto the sliding plate and then slide from the sliding plate into the crushing component. Setting the auxiliary plate can make the soil materials fall in the middle of the crushing component, avoiding the soil materials from sliding onto the vehicle body, avoiding the trouble of later cleaning, and reducing the labor intensity.

[0028] 4. The disclosed device of the present invention is provided with a flipping arc plate above the stirring drum housing. The flipping arc plate can prevent the mixture from falling back, affecting the stirring effect of the mixture, and can also evenly disperse the mixture between the stirring drum housing and the outer housing of the stirring chamber.

[0029] 5. The disclosed device of the present invention is provided with cross bars, longitudinal bars and vertical bars inside the support skeleton to support the screen, prevent the screen from being overly sunken and deformed, damage the screen, and improve the durability of the device. Brief Description of the Drawings

[0030] Figure 1 is a schematic diagram of the overall structure of the disclosed device of the present invention;

[0031] Figure 2 is a schematic diagram of the structure of the equipment carried on the transport vehicle of the disclosed device of the present invention;

[0032] Figure 3 is a schematic diagram of the screening assembly structure of the disclosed device of the present invention;

[0033] Figure 4 is a schematic diagram of the half-section structure of the screening assembly of the disclosed device of the present invention;

[0034] Figure 5 is an exploded view of the preparation assembly of the disclosed device of the present invention.

[0035] Wherein: 1. Transport vehicle; 2. Water supply assembly; 21. Water supply pipe; 211. Water supply pipe for the curing agent slurry preparation chamber; 212. Water supply pipe for the stirring chamber; 3. Curing agent storage chamber; 31. Curing agent raw material conveying pipe; 4. Curing agent slurry preparation chamber; 41. Curing agent conveying pipeline; 5. Screening assembly; 51. Screen; 52. Support skeleton; 521. Cross bar; 522. Longitudinal bar; 523. Vertical bar; 53. Slide plate; 54. Eccentric vibration motor; 55. Feeder; 56. Auxiliary plate; 6. Crushing assembly; 7. Preparation assembly; 71. Stirring chamber; 711. Outer housing of the stirring chamber; 712. First discharge port; 713. First feed port; 714. Second feed port; 715. Second discharge port; 716. Stirring drum; 717. Stirring drum housing; 72. Product storage chamber; 73. Cured soil conveying pipeline; 731. Conveying pipeline for the storage chamber; 732. Conveying pipeline for the stirring chamber. Detailed Embodiments

[0036] It should be noted that the following detailed description is exemplary and is intended to provide further illustration of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0037] Such as Figures 1 - 5As shown in the figure, a device for preparing fluidized solidified soil for foundation pit backfilling and a backfilling method thereof include a transport vehicle 1. Above the transport vehicle 1, a water supply component 2, a curing agent storage chamber 3, a curing agent slurry preparation chamber 4, a crushing component 6 and a preparation component 7 are arranged. The water supply component 2 is connected to the curing agent slurry preparation chamber 4 and the preparation component 7 through pipelines. The curing agent storage chamber 3 is connected to the curing agent slurry preparation chamber 4 through a curing agent raw material delivery pipe 31. The crushing component 6 is arranged above the preparation component 7. Through the device disclosed in the present invention, fluidized solidified soil can be prepared at the construction site, saving raw materials and the transportation cost of fluidized solidified soil, adding raw materials according to the on-site backfilling situation to avoid waste. It also includes a screening component 5. The screening component 5 is arranged above the transport vehicle 1 and is connected to the crushing component 6. Although the screened soil materials already meet the standards of the "Technical Standard for Application of Fluidized Solidified Soil", they still need to be further crushed. One is to avoid high water content of the soil materials and sticking together, and the other is to further crush the soil materials to improve the soil material standards, thereby improving the uniformity and stability of the fluidized solidified soil;

[0038] The screening component 5 includes a screen mesh 51, a support skeleton 52 and a sliding plate 53 which are connected in sequence from top to bottom. An eccentric vibration motor 54 is fixedly arranged on the bottom surface of the sliding plate 53. The screening component 5 is driven to vibrate by the eccentric vibration motor 54 to improve the screening rate and effect. It also includes a feeder 55. The horizontal section of the feeder 55 is connected to the discharge end of the screen mesh 51. Large-particle soil blocks and stones slide onto the horizontal section of the feeder 55 on the upper surface of the screen mesh 51 and are sent to the rear of the transport vehicle 1 through the feeder 55 and transported away by workers;

[0039] Inside the preparation component 7, a stirring chamber 71 and a product storage chamber 72 are arranged. The stirring chamber 71 and the product storage chamber 72 are connected through pipelines. The stirring chamber 71 includes a stirring chamber outer shell 711. At the central position inside the stirring chamber outer shell 711, a stirring drum 716 is arranged. The lower stirring blades of the stirring drum 716 gradually become shorter from bottom to top and then remain unchanged. The diameter of the lower end of the stirring drum 716 is equal to the inner diameter of the stirring chamber outer shell 711. An electric motor is arranged inside the stirring drum 716. A stirring drum housing 717 is fixed outside the stirring drum 716. The lower part of the stirring drum housing 717 is designed with a hollow. When the stirring drum 716 rotates, the mixture at the bottom of the stirring chamber 71 can be transported to the upper part, and the mixture then freely falls from the upper part. The hollow design of the lower part of the stirring drum housing 717 enables the mixture to re-enter the stirring blades below the stirring drum 716. This cycle is repeated to make the mixture evenly mixed and produce high-quality fluidized solidified soil.

[0040] As Figure 2As shown, the water supply assembly 2 is provided with a water supply pipe 21. On the water supply pipe 21, a water supply pipe 211 for the curing agent slurry preparation chamber and a water supply pipe 212 for the stirring chamber are fixedly provided respectively. The water supply pipe 211 for the curing agent slurry preparation chamber is connected to the curing agent slurry preparation chamber 4, and the water supply pipe 212 for the stirring chamber is connected to the first feed port 713 provided on the outer shell 711 of the stirring chamber;

[0041] The curing agent slurry preparation chamber 4 further includes a curing agent delivery pipe 41. One end of the curing agent delivery pipe 41 is connected to the shell of the curing agent slurry preparation chamber 4, and the other end is connected to the second feed port 714 provided on the outer shell 711 of the stirring chamber.

[0042] The preparation assembly 7 further includes a solidified soil delivery pipe 73. On the solidified soil delivery pipe 73, a storage chamber delivery pipe 731 and a stirring chamber delivery pipe 732 are provided respectively. The storage chamber delivery pipe 731 is connected to the product storage chamber 72, and the stirring chamber delivery pipe 732 is connected to the second discharge port 715 provided on the outer shell of the stirring chamber 711. A first discharge port 712 is also provided on the outer shell 711 of the stirring chamber. The first discharge port 712 is connected to the product storage chamber 72 through a pipe. The fluidized solidified soil prepared in the stirring chamber 71 will be preferentially stored in the product storage chamber 72 and then transported from the product storage chamber 72 to the position to be backfilled. During this period, the stirring chamber 71 can continue to prepare the fluidized solidified soil, repeating the cycle to improve work efficiency.

[0043] As Figure 3 and Figure 4 shown, the screening assembly 5 further includes an auxiliary plate 56. The auxiliary plate 56 is fixed at the discharge end of the sliding material plate 53. The other end of the auxiliary plate 56 is inclined downward. The qualified soil material filtered by the screen 51 will fall onto the sliding material plate and slide from the sliding material plate 53 into the crushing assembly 6. The provision of the auxiliary plate 56 can make the soil material fall in the middle of the crushing assembly 6, avoiding the soil material from sliding onto the vehicle body, avoiding the trouble of later cleaning, and reducing the labor intensity.

[0044] As Figure 5 shown, a turning arc plate is provided above the stirring drum shell 717. The turning arc plate is narrow at the top and wide at the bottom. The diameter of the lower end of the turning arc plate is smaller than the diameter of the lower end of the stirring drum 716. The turning arc plate can prevent the mixture from falling back and affecting the mixing effect of the mixture, and can also evenly disperse the mixture between the stirring drum shell 717 and the outer shell 711 of the stirring chamber.

[0045] As Figure 4As shown, a plurality of mutually perpendicular and intersecting cross bars 521 and longitudinal bars 522 are fixedly arranged inside the support skeleton 52. Vertical bars 523 are vertically arranged at the intersection positions of the cross bars 521 and the longitudinal bars 522. The upper ends of the vertical bars 523 are in contact with the bottom surface of the screen 51, and the lower ends of the vertical bars 523 are in contact with the top surface of the material sliding plate 53, supporting the screen 51 to prevent the screen 51 from being excessively sunken and deformed, and damaging the screen 51.

[0046] A funnel is arranged below the crushing assembly 6. The lower part of the funnel extends into the upper end of the outer shell 711 of the mixing chamber. All the soil materials processed by the crushing assembly 6 fall into the interior of the outer shell 711 of the mixing chamber.

[0047] The aperture of the screen 51 is 50 mm. The particle size of the soil material specified in the "Technical Standard for the Application of Fluidized Solidified Soil" T / SDSZ 8-2023 is less than or equal to 50 mm. Strict requirements are imposed on screening to improve the uniformity and stability of the fluidized solidified soil, and at the same time reduce the pressure on the crushing assembly 6.

[0048] A method for backfilling a foundation pit with fluidized solidified soil includes the following steps:

[0049] S1. Treatment of the bottom surface of the foundation pit, cleaning debris, and for soft foundations, replacement treatment shall be carried out according to the specifications.

[0050] S2. The fluidized solidified soil needs to be poured in layers. The pouring thickness in the conventional area is ≤ 1.2 m, and the pouring thickness in the complex structure area is ≤ 0.8 m. Moreover, in the complex structure area, multi-point pouring and over-pouring are adopted. Multi-point pouring can effectively avoid the generation of holes. It is inevitable to generate holes inside the pouring in the complex structure area. Under the action of the self-compacting of the fluidized solidified soil, the gas is discharged. Over-pouring can avoid the appearance of height differences on the upper surface. When pouring, the principle of from deep to shallow and from far to near shall be followed.

[0051] S3. The outlet of the conveying pipeline 73 of the fluidized solidified soil extends into the solidified soil or is close to the upper surface of the solidified soil, effectively preventing air from entering the interior of the solidified soil.

[0052] S4. After pouring, the surface shall be scraped flat before final setting, and a 2% - 3% drainage slope shall be reserved. Drainage ditches shall be set according to the foundation pit points.

[0053] S5. After final setting, cover with geotextile + plastic film, and maintain moisture for ≥ 7 days. When the ambient temperature is < 5 °C, lay an additional heat preservation cotton quilt.

[0054] The usage method of the device disclosed in the present invention:

[0055] 1. Drive the transport vehicle 1 near the foundation pit to be backfilled. At this time, the miscellaneous soil excavated from the road is piled up near the construction site.

[0056] 2. Pre-run the device, check the device status, and then fill the water supply assembly 2 and the curing agent storage chamber 3 with raw materials.

[0057] 3. Operating device: Use a forklift or manual labor to transport the miscellaneous soil to the screening assembly 5. At the same time, observe the large-sized soil blocks and stones discharged below the feeder 55. After reaching a certain quantity, transport them out of the construction site.

[0058] 4. Continuously detect the fluidized solidified soil discharged from the solidified soil conveying pipeline 73, and adjust the ratio according to the detection results. Since the moisture content of the miscellaneous soil at the construction site is uncertain, it is necessary to adjust the production mix of the device at any time.

[0059] 5. Estimate the amount of fluidized solidified soil required for the project, stop production before the backfilling is about to be completed, and discharge the fluidized solidified soil inside the product storage chamber 72 and the mixing chamber 71.

[0060] 6. Clean the preparation assembly 7, and drive the transport vehicle 1 away from the site.

[0061] In the description of the present invention, the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "vertical", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings. It is only for describing the present invention and does not require the present invention to be constructed or operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. The "connected" and "connected" in the present invention should be understood in a broad sense. For example, it can be a connection or a detachable connection; it can be a direct connection or an indirect connection through an intermediate component. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0062] The above is the preferred operation mode of the present invention. The description of the specific operation mode is only for better understanding the idea of the present invention. For those of ordinary skill in the technical field, several improvements or equivalent replacements can also be made according to the principle of the present invention, and these improvements or equivalent replacements are also regarded as falling within the protection scope of the present invention.

Claims

1. A fluidized solidified soil preparation device for foundation pit backfilling, comprising a transport vehicle (1), a water supply component (2), a curing agent storage chamber (3), a curing agent slurry preparation chamber (4), a crushing component (6) and a preparation component (7) are arranged above the transport vehicle (1), the water supply component (2) is connected to the curing agent slurry preparation chamber (4) and the preparation component (7) through a pipeline, the curing agent storage chamber (3) is connected to the curing agent slurry preparation chamber (4) through a curing agent raw material delivery pipe (31), the crushing component (6) is arranged above the preparation component (7), and is characterized in that: It also includes a screening component (5), wherein the screening component (5) is arranged above the transport vehicle (1) and is connected to the crushing component (6), and the screened soil material is further crushed by the crushing component (6); The screening assembly (5) comprises a screen (51), a support frame (52) and a sliding plate (53) connected in sequence from top to bottom, an eccentric vibration motor (54) being fixedly arranged on the bottom surface of the sliding plate (53), and a feeder (55), wherein a horizontal section of the feeder (55) is connected to a discharge end of the screen (51); A stirring chamber (71) and a product storage chamber (72) are arranged inside the preparation component (7), and the stirring chamber (71) and the product storage chamber (72) are connected by a pipeline. The stirring chamber (71) comprises a stirring chamber shell (711), and a stirring roller (716) is arranged at the center position inside the stirring chamber shell (711). The stirring blades below the stirring roller (716) gradually become shorter from bottom to top and then remain unchanged. The diameter of the lower end of the stirring roller (716) is equal to the inner diameter of the stirring chamber shell (711). A motor is arranged inside the stirring roller (716), and a stirring roller shell (717) is fixed outside the stirring roller (716). The lower part of the stirring roller shell (717) is hollowed out. A flip arc plate is arranged above the stirring roller shell (717), and the flip arc plate is narrow at the top and wide at the bottom. The diameter of the lower end of the flip arc plate is smaller than the diameter of the lower end of the stirring roller (716).

2. The fluidized solidified soil preparation device for foundation pit backfilling according to claim 1, characterized in that: The water supply assembly (2) is provided with a water supply pipe (21), on which a curing agent slurry preparation chamber water supply pipe (211) and a mixing chamber water supply pipe (212) are respectively fixedly provided, the curing agent slurry preparation chamber water supply pipe (211) is connected to the curing agent slurry preparation chamber (4), and the mixing chamber water supply pipe (212) is connected to a first feed port (713) provided on a mixing chamber shell (711).

3. The fluidized solidified soil preparation device for foundation pit backfilling according to claim 2, characterized in that: The curing agent slurry preparation chamber (4) further comprises a curing agent delivery pipeline (41), one end of the curing agent delivery pipeline (41) being connected to the shell of the curing agent slurry preparation chamber (4), and the other end of the curing agent delivery pipeline (41) being connected to a second feed port (714) provided on the outer shell (711) of the stirring chamber.

4. The fluidized solidified soil preparation device for foundation pit backfilling according to claim 3, characterized in that: The preparation assembly (7) further comprises a solidified soil conveying pipeline (73), on which a storage chamber conveying pipeline (731) and a mixing chamber conveying pipeline (732) are respectively arranged, the storage chamber conveying pipeline (731) is connected to the product storage chamber (72), the mixing chamber conveying pipeline (732) is connected to a second discharge port (715) arranged on the mixing chamber shell (711), and the mixing chamber shell (711) is also provided with a first discharge port (712), and the first discharge port (712) is connected to the product storage chamber (72) via a pipeline.

5. The fluidized solidified soil preparation device for foundation pit backfilling according to claim 1, characterized in that: The screening assembly (5) further comprises an auxiliary plate (56), wherein the auxiliary plate (56) is fixed to the discharge end of the sliding plate (53), and the other end of the auxiliary plate (56) is arranged to be inclined downward.

6. The fluidized solidified soil preparation device for foundation pit backfilling according to claim 1, characterized in that: A plurality of mutually perpendicularly staggered horizontal bars (521) and vertical bars (522) are fixedly arranged inside the support frame (52); vertical bars (523) are arranged perpendicularly at the intersection of the horizontal bars (521) and the vertical bars (522); the upper ends of the vertical bars (523) are in contact with the bottom surface of the screen (51), and the lower ends of the vertical bars (523) are in contact with the top surface of the sliding plate (53).

7. The fluidized solidified soil preparation device for foundation pit backfilling according to claim 1, characterized in that: A funnel is provided below the pulverizing assembly (6), and the bottom of the funnel extends into the upper end of the mixing chamber shell (711).

8. The fluidized solidified soil preparation device for foundation pit backfilling according to claim 1, characterized in that: The sieve (51) has a hole diameter of 50 mm.

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