A system for preparing a cast-in-place soil-cement mixture based on accurate metering of fine clay particles

Abstract

The utility model discloses a kind of pouring type solidified soil preparation systems based on clay fine particle accurate measurement, including crushing screening and weighing system, clay fine particle accurate measurement system, transport system and mixing system;The clay fine particle accurate measurement system includes the aggregate hopper of suspension arrangement, clay fine particle is added to aggregate hopper, a plurality of weighing sensors are provided on the aggregate hopper, the first screw conveyor is arranged at the bottom of the aggregate hopper, and it is used to convey the material in aggregate hopper to transport system according to the set dosage.The utility model has the advantages of clay fine particle accurate measurement, preparation solidified soil performance stable, engineering solid waste does not need crushing screening secondary processing, waste slag soil resource utilization rate is high, and can be applied to the preparation of various solidified soil.

Description

Technical Field

[0001] This utility model relates to the field of civil engineering technology. More specifically, this utility model relates to a cast-in-place solidified soil preparation system based on precise metering of fine clay particles. Background Technology

[0002] Traditional roadbed filling and base course construction mainly rely on natural sand and gravel. However, with increasing environmental protection requirements and resource shortages, the reuse of construction waste has become an important research direction. Solidified soil, as a new type of green building material, has been widely used in road engineering, foundation pit backfilling, and other fields in recent years. Its core advantage lies in its ability to utilize waste soil, construction debris, silt, and other resources, reducing dependence on natural sand and gravel while improving construction efficiency.

[0003] Currently, existing technologies for preparing solidified soil largely rely on manual labor or simple mixing equipment, resulting in insufficient mixing uniformity and an inability to dynamically control material ratios and curing conditions, leading to fluctuations in the quality of the solidified soil. With the development of solidified soil preparation technology, complete solidified soil preparation systems have emerged, boasting a high degree of mechanization and achieving the requirements of uniform material mixing and approximate control of material ratios. However, the lack of precise metering systems still exists, making it difficult to accurately control the quality of fine particles such as clay, causing fluctuations in the quality of the solidified soil.

[0004] Existing solidified soil preparation systems typically use weighing sensors to control the amount of clay or use flow meters to control the amount of clay after it has been made into a slurry. Both methods have their drawbacks. For example, the patent "A System for Making Liquid Solidified Soil from Waste Soil" (patent number: CN202421030064.1) uses weighing sensors to control the amount of soil and slurry in its solidified soil preparation system. However, it lacks a soil weight verification procedure and control method, which leads to difficulties in accurately controlling the amount of fine soil particles. This affects the mix proportions and performance of the solidified soil, resulting in poor strength, durability, and stability, and consequently impacting the safety and service life of the overall project. Similarly, the patent "A Construction System and Method for Fluidized Solidified Soil" (patent number: CN202411276822.2) uses a flow meter to control the amount of clay after the soil has been made into a slurry. This method requires ensuring the uniformity of the slurry to guarantee the accuracy of the flow meter's control over the amount of clay. Moreover, the clay slurry preparation process is extensive, and adding this series of processing steps undoubtedly increases construction costs significantly. Therefore, it is necessary to further develop a solidified soil preparation system that can accurately measure clay fine particles, effectively solving the problems of difficulty in accurately controlling the clay fine particle content and numerous processing steps in the solidified soil preparation process, so as to reduce construction costs and improve construction quality. Utility Model Content

[0005] One objective of this invention is to provide a cast-in-place solidified soil preparation system based on precise measurement of fine clay particles. This system has advantages such as precise measurement of fine clay particles, stable solidified soil performance, no need for secondary processing of engineering solid waste such as crushing and screening, and high resource utilization rate of waste soil. It can be applied to the preparation of various solidified soils.

[0006] To address the aforementioned technical problems, this utility model provides a castable solidified soil preparation system based on precise measurement of fine clay particles, comprising a crushing, screening, and weighing system, a fine clay particle precise measurement system, a transportation system, and a mixing system. The crushing, screening, and weighing system is used to crush and screen large solid waste materials to a set particle size range, while simultaneously weighing them according to a set dosage. The fine clay particle precise measurement system is used to accurately weigh the fine-particle solid waste. The transportation system is used to transport the materials weighed and measured by the crushing, screening, and weighing system and the fine clay particle precise measurement system to the mixing system. The mixing system includes a mixing drum with multiple inlets for adding other materials; various materials are mixed evenly in the mixing drum to produce castable solidified soil.

[0007] The clay fine particle precision metering system includes a suspended collection hopper into which clay fine particles are added. The collection hopper is equipped with multiple weighing sensors, and a first screw conveyor is installed at the bottom of the collection hopper to transport the material in the collection hopper to the transportation system according to the set usage.

[0008] Preferably, the hopper contains multiple rotating shafts above the first screw conveyor, which are driven to rotate by a motor, and multiple mud-removing rods are arranged alternately on the rotating shafts.

[0009] Preferably, the multiple rotating shafts are arranged in two layers, with the upper and lower layers of rotating shafts arranged alternately and in parallel, and the central axis of the rotating shafts is arranged perpendicular to the central axis of the first screw conveyor.

[0010] Preferably, the crushing, screening and weighing system includes a crusher, a cylindrical screening device and a weighing and feeding device connected in sequence through a transport system. The crusher is used to crush large solid waste, the cylindrical screening device is used to screen the crushed solid waste to a set particle size range, and the weighing and feeding device is used to dynamically weigh the screened solid waste.

[0011] Preferably, the transport system includes multiple belt conveyors, all of which are inclined upward along the conveying direction. The multiple belt conveyors are sequentially connected to the crusher and the cylindrical screening equipment, the cylindrical screening equipment and the weighing and feeding equipment, and the weighing and feeding equipment and the mixing drum. The first screw conveyor transports the material to the belt conveyor between the weighing and feeding equipment and the mixing drum.

[0012] Preferably, the mixing system further includes a curing agent slurry preparation, mixing and storage system, which is used for the preparation and storage of curing agent slurry. A water metering system is installed above the curing agent slurry preparation, which is used to measure the amount of water added during the preparation of curing agent slurry. The prepared curing agent slurry is transported to the mixing tank through a transportation system.

[0013] Preferably, the mixing system further includes a silo for storing curing agent and additives, wherein the stored curing agent is transported to a curing agent slurry mixing and storage system, and the stored additives are transported to a mixing tank.

[0014] Preferably, the mixing tank is also equipped with a curing agent metering system and an admixture metering system, which are used to measure the amount of curing agent slurry and admixture added to the mixing tank, respectively.

[0015] Preferably, the mixing drum is also equipped with a water pipe for supplying water to the mixing drum, and the water pipe is connected to a water tank.

[0016] Preferably, the mixing tank is also equipped with a stirring system for stirring the materials.

[0017] This utility model has at least the following beneficial effects:

[0018] (1) The cylindrical screening equipment in the casting-type solidified soil preparation system based on the precise metering of fine clay particles in this application is only set with a screen size of 31.5 mm to control the maximum particle size of the crushed material. It can realize that crushed material with a particle size of less than 31.5 mm can be directly configured into casting-type solidified soil in a full gradation manner without screening, and its solid waste resource utilization rate is about 100%.

[0019] (2) The casting-type solidified soil preparation system based on the precise metering of fine clay particles in this application has a built-in crushing, screening and weighing system. Engineering solid waste (road milling slag, concrete waste, etc.) can be directly put into the system to prepare solidified soil without secondary processing, reducing related procedures, improving the efficiency of solidified soil preparation and effectively reducing construction costs.

[0020] (3) The clay fine particle precise metering system in the casting-type solidified soil preparation system based on the precise metering of clay fine particles in this application has the flow metering of the first screw conveyor and the weight reduction metering of the weighing sensor. It can accurately meter fine particles such as clay and silt. Its dual metering is not only reliable but also highly accurate. During the construction process, the solidified soil mix ratio is more precisely controlled, and the prepared solidified soil has more stable performance, which can greatly improve the construction quality.

[0021] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0022] Figure 1 This is an equipment diagram of the cast-in-place solidified soil preparation system based on precise metering of fine clay particles, which is the present invention.

[0023] Figure 2 This is a front view of the precise clay fine particle metering system of this utility model.

[0024] Figure 3 This is a side view of the precise clay fine particle metering system of this utility model.

[0025] Figure 4 This is a top view of the precise clay fine particle metering system of this utility model.

[0026] Reference numerals in the attached drawings: 1—jaw crusher; 2—cylindrical screening equipment; 3—belt conveyor; 4—weighing and feeding equipment; 5—precise metering system for fine clay particles; 6—silo; 7—hardener slurry mixing and storage system; 8—water metering system; 9—mixing system; 10—hardener metering system; 11—admixture metering system; 12—water pipeline; 13—water tank; 14—second screw conveyor; 5-1—first screw conveyor; 5-2—rotating shaft; 5-3—upper and lower layer motors; 5-4—mud-dissolving rod; 5-5—collecting hopper; 5-6—weighing sensor. Detailed Implementation

[0027] To better understand the purpose, structure, and function of this utility model, the following detailed description is provided in conjunction with the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0028] It should be noted that in the description of this utility model, the terms "horizontal", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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 this utility model.

[0029] like Figures 1 to 4 As shown, this utility model provides a cast-in-place solidified soil preparation system based on precise metering of fine clay particles, which mainly consists of the following four parts:

[0030] 1) The crushing, screening and weighing system consists of a jaw crusher 1, a cylindrical screening device 2, and a weighing and feeding device 4; the crushing, screening and weighing system is used to crush and screen large solid wastes to a set particle size range, and weigh them according to the set amount. The crushing, screening, and weighing system includes a crusher, a cylindrical screening device, and a weighing and feeding device connected sequentially via a transport system. The crusher is used to crush large pieces of solid waste. The cylindrical screening device is used to screen the crushed solid waste. By setting the particle size of the cylindrical screening device, the particle size range of the screened material is controlled within a set range. The weighing and feeding device is used to dynamically weigh the screened solid waste. The weighing and feeding device can be a belt scale, which is a dynamic weighing device installed on a belt conveyor. The screened solid waste is transported to the belt conveyor of the weighing and feeding device via a belt conveyor. The belt scale dynamically weighs the transported solid waste. When the set amount is reached, the conveyor opening is closed, and the waste is transported to the next belt conveyor according to the set weighing amount.

[0031] 2) The clay fine particle precision metering system 5 consists of a first screw conveyor 5-1, a rotating shaft 5-2, upper and lower layer motors 5-3, a mud-dissolving rod 5-4, a collection hopper 5-5, and a weighing sensor 5-6; the clay fine particle precision metering system is used for precise weighing of fine particle solid waste. For example... Figures 2 to 4 As shown, the precise metering system for fine clay particles includes a suspended collection hopper, which is suspended by a support frame. Fine clay particles are added into the collection hopper, which is equipped with multiple weighing sensors. A first screw conveyor is located at the bottom of the collection hopper, which transports the material in the collection hopper to the transportation system according to a set dosage. The material is transported according to a set flow rate by controlling the rotation speed of the first screw conveyor. Multiple rotating shafts are installed above the first screw conveyor inside the collection hopper, driven by a motor. Multiple mud-removing rods are staggered on each rotating shaft. The multiple rotating shafts are arranged in two layers, with the upper and lower layers arranged alternately and parallel. The central axis of each rotating shaft is perpendicular to the central axis of the first screw conveyor. The first screw conveyor transports the material to a belt conveyor between the weighing and feeding equipment and the mixing tank.

[0032] 3) The transport system consists of belt conveyor 3 and second screw conveyor 14; the transport system is used to transport the materials weighed and metered by the crushing, screening and weighing system and the clay fine particle precision metering system to the mixing system. The transport system includes multiple belt conveyors, all of which are inclined upwards along the conveying direction, that is, connected from the output port of the previous equipment to the input port of the next equipment. The multiple belt conveyors are sequentially connected to the crusher and the cylindrical screening equipment, the cylindrical screening equipment and the weighing and feeding equipment, and the weighing and feeding equipment and the mixing drum.

[0033] 4) The mixing system consists of a silo 6, a curing agent slurry mixing and storage system 7, a water metering system 8, a mixing system 9, a curing agent metering system 10, an admixture metering system 11, water pipelines 12, and a water tank 13. The mixing system includes a mixing drum with multiple inlets for adding other materials. Various materials are mixed evenly in the mixing drum to form castable solidified soil. The curing agent slurry mixing and storage system is used for the preparation and storage of the curing agent slurry. A water metering system is installed above this system to measure the amount of water added during the preparation of the curing agent slurry. The prepared curing agent slurry is transported to the mixing drum via a transport pipeline. The silo stores the curing agent and admixtures. The curing agent is transported to the curing agent slurry mixing and storage system via a second screw conveyor, and the admixtures are also transported to the mixing drum via the second screw conveyor. The curing agent metering system and the admixture metering system are used to measure the amount of curing agent slurry and admixtures added to the mixing drum, respectively. The mixing drum is also equipped with a water pipe for supplying water to the drum, and the water pipe is connected to a water tank. The mixing drum is also equipped with a stirring system for stirring the materials. The water metering system, curing agent metering system, and admixture metering system can all be configured with flow meters.

[0034] The specific preparation process of cast-in-place solidified soil using the precise metering system for fine clay particles described in this application includes three parts, and the specific implementation method is as follows:

[0035] 1. Crushing, screening, and metering of solid waste from engineering projects.

[0036] Construction solid waste is processed by a crushing, screening and weighing system. The jaw crusher in the crushing, screening and weighing system can crush large solid waste such as road milling slag and concrete waste. It can crush the construction solid waste into crushed material within a certain particle size range. The cylindrical screening equipment can screen out crushed material with a particle size of less than 31.5mm. The weighing and feeding equipment can store the screened material and weigh and feed it.

[0037] Construction solid waste (such as road milling excavation soil and concrete waste) is transported by a loader to a jaw crusher for crushing. The crushed material is then transported by belt conveyor to a cylindrical screening device for screening. After screening, the crushed material with a particle size of less than 31.5mm is transported by belt conveyor to a weighing and feeding device for storage and later use. The crushed material with a particle size of more than 31.5mm is collected and transported back to the jaw crusher for secondary crushing. During mixing, the weighing and feeding device weighs and feeds the material according to the solidified soil mix ratio. Finally, the material is transported by belt conveyor to the mixing system.

[0038] Clay treatment and measurement

[0039] The clay fine particle precision metering system can process and meter fine particle solid waste such as clay and silt in engineering solid waste. The equipment features a motor-driven shaft with several mud-dissolving rods distributed on it. Two rods are positioned at the top and three at the bottom, staggered. The bottom layer houses the first screw conveyor for clay flow measurement. Weighing sensors are located at the four corners of the hopper for clay weighing. The system employs a dual metering method. After determining the amount of clay fine particles based on the mix proportion, the system automatically calculates the required clay flow rate and weight. First, the first screw conveyor outputs clay according to the determined flow rate and stops outputting once the flow rate is reached. The weighing sensors then verify the output clay weight based on the weight loss of the clay in the hopper. If the required weight is not achieved, the first screw conveyor slowly resumes operation until the required weight is reached. The error range between the two measurements is ±0.5%. If the error between two measurements exceeds 0.5%, the feeding speed will be reduced, and normal feeding will resume after dynamic matching. Feeding is a continuous process, and the error range between the two measurements will be continuously monitored. When the feeding amount is about to be reached, the feeding speed of the first screw conveyor will be reduced. This usually only happens before the feeding amount is completed. If the error range exceeds the set range during the feeding process, dynamic adjustments can be made. For example, if the error exceeds the set range, the operating speed of the first screw feeder or belt feeder can be reduced or increased. This can reduce the output amount, and when the expected weight is about to be reached, a small amount of material can be slowly discharged to control the error.

[0040] After entering the collection hopper, the clay is deslimed by a desliming rod to ensure the uniformity of the clay particles after mixing. The uniformly mixed fine clay particles are then transported and discharged by the first screw conveyor. The volumetric flow rate of clay transported by the first screw conveyor is fixed for each screw conveyor cycle, allowing for clay flow rate measurement. A weighing sensor detects the weight of the discharged clay, enabling weight reduction measurement. The weighing sensor can also verify and confirm the clay flow rate, achieving precise measurement of fine clay particles. This dual metering system is not only reliable but also highly accurate, allowing for precise control of the precise discharge amount of fine clay particles. During mixing, the system meteres and feeds the clay according to the solidified soil mix ratio, and finally, the clay is transported to the mixing system by a belt conveyor.

[0041] Solidified soil mixing

[0042] Crushed material, clay, curing agent, admixtures, water, and other materials are mixed by a mixing system to form castable solidified soil. The mixing system has silos for storing curing agent and admixtures, a curing agent slurry mixing and storage system for preparing and storing curing agent slurry, a water metering system for measuring water usage, a mixing system for mixing solidified soil, a curing agent metering system for measuring the amount of curing agent slurry used, an admixture metering system for measuring the amount of admixture used, water pipelines for supplying water to the mixing system, and a water tank for supplying water.

[0043] Materials such as curing agents and admixtures are fed from the silo to the transportation system. The curing agent is transported by the second screw conveyor to the curing agent slurry mixing and storage system, where it is mixed with water for slurry mixing and then stored for later use. The admixtures are also transported by the second screw conveyor to the admixture metering system for storage. According to the solidified soil mix ratio, the metered clay, screened and crushed materials, and other materials are transported to the mixing system. The curing agent metering system, admixture metering system, and water metering system add appropriate amounts of curing agent slurry, admixtures, and water to the mixing system. After being mixed evenly, the solidified soil is made into a castable solidified soil. The finished castable solidified soil is discharged from the discharge port of the mixing system.

[0044] Example 1

[0045] The basic information regarding the construction of the cast-in-place solidified soil base course for Highway #1 is as follows: The construction section is a major and medium-scale maintenance section, a secondary highway with a design speed of 80 km / h. The base course has a design width of 12.3 m and a thickness of 32 cm; the subbase course has a design width of 12.3 m and a thickness of 20 cm; the base course will be constructed using cast-in-place solidified soil. The mix proportions of the cast-in-place solidified soil are shown in Table 1. The 7-day unconfined compressive strength of both the base course and subbase course solidified soil is not less than 5 MPa.

[0046] Table 1 Mix proportions of cast-in-place solidified soil base course and subbase course

[0047]

[0048] Step 1: Set up a mixing site, install a cast-in-place solidified soil preparation system based on precise metering of fine clay particles, and configure stockpiles for inorganic binder recycled materials, waste soil recycled materials, and water pools.

[0049] Step 2: The jaw crusher is equipped with a loader. The inorganic binder recycled material is transported by the loader to the jaw crusher for crushing.

[0050] Step 3: The crushed material is transported by belt conveyor to a cylindrical screening device for screening.

[0051] Step 4: After screening, crushed material with a particle size of less than 31.5mm is transported by belt conveyor to a weighing and feeding device for storage and later use, while crushed material with a particle size of more than 31.5mm is returned to the jaw crusher for secondary crushing.

[0052] Step 5: The clay fine particle precision metering system is equipped with an excavator. The waste soil recycling material is transferred by the excavator to the collection hopper of the clay fine particle precision metering system for mud removal and storage for later use.

[0053] Step 6: Hardeners, additives, and other materials are transported from off-site to a storage silo for later use;

[0054] Step 7: Before mixing, the curing agent is discharged from the silo and transported by the second screw conveyor to the curing agent slurry mixing and storage system. After being mixed with water for slurry mixing, it is stored for later use and then transported to the mixing tank through the conveying pipeline.

[0055] Step 8: Before mixing, the admixture is discharged from the silo and transported by the second screw conveyor to the admixture metering system for storage and later use;

[0056] Step 9: Before mixing, the weighing and feeding equipment weighs and feeds the crushed material according to the solidified soil mix ratio, and the material is transported to the mixing system by belt conveyor.

[0057] Step 10: Before mixing, the waste soil recycling material enters the first screw conveyor for transportation and discharge. The clay fine particle precision metering system meteres and feeds the waste soil recycling material according to the solidified soil mix ratio, and it is transported to the mixing system by belt conveyor.

[0058] Step 11: Before mixing, according to the mix proportion of the solidified soil, add appropriate amounts of solidified slurry, cement and water to the mixing system through the solidified agent metering system, admixture metering system and water metering system;

[0059] Step 12: After adding all materials to the mixing system, mix them evenly to form a castable solidified soil, which is then discharged from the mixing system outlet.

[0060] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model, and other modifications can be easily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and examples shown and described herein.

Claims

1. A cast-in-place solidified soil preparation system based on precise metering of fine clay particles, characterized in that, The system includes a crushing, screening, and weighing system, a clay fine particle precision metering system, a transportation system, and a mixing system. The crushing, screening, and weighing system is used to crush and screen large solid wastes to a set particle size range, and simultaneously weigh them according to a set dosage. The clay fine particle precision metering system is used to accurately weigh fine-particle solid wastes. The transportation system is used to transport the materials weighed and metered by the crushing, screening, and weighing system and the clay fine particle precision metering system to the mixing system. The mixing system includes a mixing drum with multiple inlets for adding other materials. Various materials are mixed evenly in the mixing drum to form castable solidified soil. The clay fine particle precision metering system includes a suspended collection hopper into which clay fine particles are added. The collection hopper is equipped with multiple weighing sensors, and a first screw conveyor is installed at the bottom of the collection hopper to transport the material in the collection hopper to the transportation system according to the set usage.

2. The cast-in-place solidified soil preparation system based on precise metering of fine clay particles as described in claim 1, characterized in that, The hopper contains multiple rotating shafts above the first screw conveyor, which are driven to rotate by a motor. Multiple mud-removing rods are arranged alternately on the rotating shafts.

3. The cast-in-place solidified soil preparation system based on precise metering of fine clay particles as described in claim 2, characterized in that, Multiple rotating shafts are arranged in two layers, with the upper and lower layers of rotating shafts arranged alternately and in parallel. The central axis of each rotating shaft is perpendicular to the central axis of the first screw conveyor.

4. The cast-in-place solidified soil preparation system based on precise metering of fine clay particles as described in claim 1, characterized in that, The crushing, screening and weighing system includes a crusher, a cylindrical screening device and a weighing and feeding device connected in sequence through a transport system. The crusher is used to crush large solid waste, the cylindrical screening device is used to screen the crushed solid waste to a set particle size range, and the weighing and feeding device is used to dynamically weigh the screened solid waste.

5. The cast-in-place solidified soil preparation system based on precise metering of fine clay particles as described in claim 1, characterized in that, The transport system includes multiple belt conveyors, all of which are inclined upwards along the conveying direction. The multiple belt conveyors are sequentially connected to the crusher and the cylindrical screening equipment, the cylindrical screening equipment and the weighing and feeding equipment, and the weighing and feeding equipment and the mixing drum. The first screw conveyor transports the material to the belt conveyor between the weighing and feeding equipment and the mixing drum.

6. The cast-in-place solidified soil preparation system based on precise metering of fine clay particles as described in claim 1, characterized in that, The mixing system also includes a curing agent slurry preparation, mixing and storage system, which is used for the preparation and storage of curing agent slurry. A water metering system is installed above the curing agent slurry preparation, which is used to measure the amount of water added during the preparation of curing agent slurry. The prepared curing agent slurry is transported to the mixing tank through a transport pipeline.

7. The cast-in-place solidified soil preparation system based on precise metering of fine clay particles as described in claim 6, characterized in that, The mixing system also includes a silo for storing curing agent and additives. The stored curing agent is transported to the curing agent slurry mixing and storage system, and the stored additives are transported to the mixing tank.

8. The cast-in-place solidified soil preparation system based on precise metering of fine clay particles as described in claim 7, characterized in that, The mixing tank is also equipped with a curing agent metering system and an admixture metering system, which are used to measure the amount of curing agent slurry and admixture added to the mixing tank, respectively.

9. The cast-in-place solidified soil preparation system based on precise metering of fine clay particles as described in claim 1, characterized in that, The mixing drum is also equipped with a water pipe for supplying water to the mixing drum, and the water pipe is connected to a water tank.

10. The cast-in-place solidified soil preparation system based on precise metering of fine clay particles as described in claim 1, characterized in that, The mixing tank is also equipped with a stirring system, which is used to stir the materials.

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