Method for preparing high-strength fluidized solidified soil containing granite residual soil
By mixing granite residual soil with solidifying agents, water, and water-reducing agents, a high-strength fluid solidified soil is formed, which solves the problem of difficult treatment of granite residual soil and achieves the reduction of engineering costs and the conservation of resources.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHENZHEN HONGYEJI GEOTECHNICAL TECH CO LTD
- Filing Date
- 2024-01-24
- Publication Date
- 2026-05-29
AI Technical Summary
Existing technologies make it difficult to effectively treat residual granite soil, resulting in high engineering costs and poor environmental performance. In particular, in foundation pit engineering, the soil needs to be transported off-site for treatment, which increases the cost of transporting excavated soil.
By mixing granite residual soil with solidifying agent, water and water-reducing agent in a certain proportion, a high-strength fluid solidified soil is formed, which is used for construction subbase and brick formwork, reducing the amount of external transportation and lowering project costs.
This approach enables the efficient utilization of residual granite soil, reduces engineering costs, improves impermeability, reduces the need for waterproofing construction, and saves resources.
Smart Images
Figure CN118026628B_ABST
Abstract
Description
Technical Field
[0001] This invention patent relates to the technical field of granite residual soil, and more specifically, to a method for preparing high-strength fluidized solidified soil containing granite residual soil. Background Technology
[0002] Granite residual soil is a special type of soil with complex engineering properties. It has high natural water content, high liquid limit, and poor water stability. It is prone to softening and disintegration when soaked in water, and may even turn into mud. 9% of my country's land area (approximately 800,000 square kilometers) is composed of granite rock, especially in the southeastern coastal areas of my country, where it is more widely distributed. In the coastal areas of Fujian and Guangdong, the thickness of granite residual soil is generally 20-35 meters.
[0003] In current technologies, the treatment of residual granite soil in engineering projects often involves discarding it or completely modifying it, which is environmentally unfriendly and significantly increases engineering costs. Especially in foundation pit engineering, the only way to treat residual granite soil is often to transport it off-site, and the cost of transporting the waste is quite expensive. Taking Shenzhen as an example, the cost of transporting waste can be as high as 80-150 yuan per cubic meter.
[0004] However, granite residual soil has a high coarse particle content, with sand content as high as 40% in the Shenzhen area. Moreover, its coarse particles are mostly quartz, which has high strength and stable physical and chemical properties. It is a reliable raw material for fluidized solidified soil. When prepared into high-strength fluidized solidified soil, its fluidity and strength are controllable, and it can be used in non-critical structures such as brick formwork in construction foundation pit engineering. Summary of the Invention
[0005] The purpose of this invention is to provide a method for preparing high-strength fluidized solidified soil containing granite residual soil, aiming to solve the problem of difficult treatment of granite residual soil during construction in the prior art.
[0006] This invention provides a method for preparing high-strength fluidized solidified soil containing granite residual soil, comprising the following preparation steps:
[0007] 1) Prepare the component materials, which, by mass percentage, include 50%-70% residual granite soil, 10%-20% curing agent, 20%-30% water, and 0.1%-0.5% water-reducing agent;
[0008] According to mass percentage, the curing agent comprises 0%-10% quicklime, 0%-50% silicate cement, 30%-75% slag powder, 0%-20% carbide slag, 0%-50% fly ash, and 5%-20% desulfurized gypsum; the water-reducing agent is a naphthalene-based water-reducing agent, a melamine water-reducing agent, or a polycarboxylate water-reducing agent;
[0009] 2) Place the components in a mixer and mix them to form a slurry-like high-strength fluid solidified soil.
[0010] Optionally, in preparation step 1), the residual soil of the granite is selected at the construction site.
[0011] Optionally, the moisture content, liquid limit, plastic limit, and particle size distribution of the granite residual soil are determined to determine the dosage of the curing agent, water, and water-reducing agent.
[0012] Optionally, in preparation step 1), a soil screening machine is used to screen the selected granite residual soil to remove particles with a diameter greater than 20 mm from the granite residual soil.
[0013] Optionally, in preparation step 1), a crusher is used to crush the sieved granite residual soil.
[0014] Optionally, in preparation step 2), the curing agent, a portion of the water, and a portion of the water-reducing agent are first added to a mixer and mixed, and then the granite residual soil is added to the mixer and mixed. During the continuous mixing of the granite residual soil, the remaining water and the remaining water-reducing agent are added simultaneously.
[0015] Optionally, in preparation step 2), during the continuous stirring and mixing of the granite residual soil, the remaining water and the remaining water-reducing agent are added to the mixer in batches simultaneously.
[0016] After all the water and water-reducing agent are added to the mixer, the mixer continues to mix for a set time to form the high-strength fluidized solidified soil by mixing the granite residual soil, solidifying agent, water and water-reducing agent.
[0017] Optionally, in the preparation step 1), the soil screening machine includes a screening cylinder arranged in a rolling manner, and the screening cylinder is arranged at an incline along its length; the screening cylinder has a screening chamber arranged at an incline, the upper end of the screening cylinder has a feed inlet, the lower end of the screening cylinder has a slag discharge outlet, and a plurality of screening mesh holes are formed on the outer periphery of the screening cylinder, and the plurality of screening mesh holes are distributed throughout the outer periphery of the screening cylinder;
[0018] The feed inlet and slag outlet are each provided with a circumferential ring, which is arranged around the circumference of the screening cylinder. A circular track is provided in the circumferential ring, which is arranged around the circumference of the circumferential ring and is arranged in a wavy curve along the circumferential direction. A follower shaft is provided in the screening chamber, which is eccentrically arranged with respect to the central axis of the screening cylinder. The two ends of the follower shaft are respectively movably connected to the circular track, and a rolling gap is formed between the follower shaft and the inner wall of the screening chamber.
[0019] In preparation step 1), after the granite residual soil is placed in the screening cylinder through the feed inlet, the screening cylinder tilts and rolls, and the granite residual soil rolls synchronously around the screen cylinder. As the screening cylinder rolls around the screen cylinder and under the action of gravity of the follower shaft, the follower shaft revolves in a wave-like manner along the circular track, and the follower shaft rotates synchronously on its own axis. During the revolution and rotation, the follower shaft squeezes the granite residual soil in the rolling interval. The impurities in the granite residual soil are discharged from the discharge port, and the screened granite residual soil is discharged downward through multiple screening mesh openings.
[0020] Optionally, in the preparation step 1), the crusher includes two vertically staggered crushing plates, which are arranged facing each other to form a crushing chamber; a top opening communicating with the crushing chamber is formed between the upper ends of the two crushing plates, and a bottom opening communicating with the crushing chamber is formed between the lower ends of the two crushing plates.
[0021] The crushing plate has a crushing surface facing the crushing chamber, and a plurality of inclined blocks are formed on the crushing plate. Along the downward inclination direction of the crushing surface, the inclined blocks are inclined towards the crushing chamber; the inclined blocks on two crushing surfaces are staggered towards each other.
[0022] In preparation step 1), the sieved granite residual soil enters the crushing chamber through the top opening. The two crushing plates are staggered and rubbed together. Multiple inclined blocks on the crushing surface squeeze and crush the granite residual soil. The crushed granite residual soil is discharged through the bottom opening.
[0023] Optionally, the inclined block has a bottom surface facing downwards, which protrudes downwards in an arc-shaped convex shape. In the preparation step 1), when the two crushing plates are misaligned and rub against the residual granite soil, the bottom surface pushes the residual granite soil downwards and squeezes it.
[0024] Compared with existing technologies ， The present invention provides a method for preparing high-strength fluidized solidified soil containing granite residual soil. This method involves uniformly mixing granite residual soil with a solidifying agent, water, and a water-reducing agent in a certain proportion to form high-strength fluidized solidified soil. The high-strength fluidized solidified soil is used for construction subbase and brick formwork to reduce the amount of granite residual soil transported out, thereby reducing project costs. Furthermore, the high-strength fluidized solidified soil has good impermeability, eliminating the need for subsequent waterproofing construction, thus reducing project costs and saving resources. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the structure of the screening cylinder provided by the present invention;
[0026] Figure 2This is a front view schematic diagram of the circumferential ring provided by the present invention;
[0027] Figure 3 This is a partial schematic diagram of the broken plate provided by the present invention. Detailed Implementation
[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.
[0029] The implementation of the present invention will be described in detail below with reference to specific embodiments.
[0030] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," and "right" 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 invention 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, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0031] Reference Figure 1-3 The image shows a preferred embodiment of the present invention.
[0032] The present invention provides a method for preparing high-strength fluidized solidified soil containing granite residual soil, comprising the following preparation steps:
[0033] 1) Prepare the component materials. According to the mass percentage, the component materials include 50%-70% granite residual soil, 10%-20% solidifying agent, 20%-30% water and 0.1%-0.5% water-reducing agent;
[0034] According to mass percentage, the curing agent includes 0%-10% quicklime, 0%-50% silicate cement, 30%-75% slag powder, 0%-20% carbide slag, 0%-50% fly ash, and 5%-20% desulfurized gypsum; the water-reducing agent is a naphthalene-based water-reducing agent, a melamine water-reducing agent, or a polycarboxylate water-reducing agent;
[0035] 2) Place the component materials in a mixer and mix them to form a slurry-like high-strength fluid solidified soil.
[0036] The above-mentioned method for preparing high-strength fluidized solidified soil containing granite residual soil involves uniformly mixing granite residual soil with a solidifying agent, water, and a water-reducing agent in a certain proportion to form high-strength fluidized solidified soil. The high-strength fluidized solidified soil is used for construction subbase and brick formwork to reduce the amount of granite residual soil transported out and lower project costs.
[0037] In preparation step 1), residual granite soil is selected at the construction site. This allows for the determination of various parameters based on the selected residual granite soil.
[0038] Specifically, the moisture content, liquid limit, plastic limit, and particle size distribution of granite residual soil are determined to determine the dosage of curing agent, water, and water-reducing agent.
[0039] In preparation step 1), the selected granite residual soil is screened using a soil screening machine to remove particles with a diameter exceeding 20mm. This avoids affecting the subsequent crushing and mixing processes, ensuring the quality of the high-strength fluidized solidified soil and guaranteeing its molding strength.
[0040] In preparation step 1), a crusher is used to crush the sieved granite residual soil. This further processes the granite residual soil into finer particles, facilitating uniform mixing with the curing agent. After crushing, the soil becomes finer and more uniform, which helps improve the mixing effect and the performance of the final product.
[0041] In preparation step 2), the curing agent, a portion of the water, and a portion of the water-reducing agent are first added to a mixer and mixed. Then, the residual granite soil is added to the mixer and mixed. While continuously mixing the residual granite soil, the remaining water and the remaining water-reducing agent are added simultaneously. In this way, the curing agent is first stirred into a slurry to ensure uniform mixing with the residual granite soil later. During the uniform mixing process, the remaining water is slowly added, allowing it to mix quickly and evenly with the mixture.
[0042] In preparation step 2), during the continuous mixing of granite residual soil, the remaining water and the remaining water-reducing agent are added to the mixer in batches simultaneously.
[0043] After all the water and water-reducing agent are added to the mixer, the mixer continues to mix for a set time, blending the granite residual soil, solidifying agent, water, and water-reducing agent to form a high-strength fluid solidified soil. This effectively ensures that the mixture is thoroughly mixed.
[0044] In preparation step 1), the soil screening machine includes a screening cylinder 100 arranged in a rolling manner. Along the length of the screening cylinder 100, the screening cylinder 100 is arranged at an incline. The screening cylinder 100 has a screening chamber arranged at an incline. The upper end of the screening cylinder 100 has a feed inlet 101, and the lower end of the screening cylinder 100 has a slag discharge outlet 102. Multiple screening mesh holes are formed on the outer periphery of the screening cylinder 100, and the multiple screening mesh holes are distributed throughout the outer periphery of the screening cylinder 100.
[0045] The feed inlet 101 and the slag outlet 102 are respectively provided with circumferential rings 110. The circumferential rings 110 are arranged around the circumferential rings 110 of the screening cylinder 100. A circular track is provided in the circumferential rings 110. The circular track is arranged around the circumferential rings 110 and is arranged in a wavy bend along the circumferential direction of the circumferential track 111. A follower shaft 120 is provided in the screening chamber. The follower shaft 120 is eccentrically arranged with respect to the central axis of the screening cylinder 100. The two ends of the follower shaft 120 are respectively movably connected in the circular track. A rolling gap is formed between the follower shaft 120 and the inner wall of the screening chamber.
[0046] In preparation step 1), after the granite residual soil is placed in the screening cylinder 100 through the feed inlet 101, the screening cylinder 100 tilts and rolls, and the granite residual soil rolls synchronously with the screening cylinder 100. As the screening cylinder 100 rolls circumferentially and under the action of gravity of the follower shaft 120, the follower shaft 120 revolves in a wave-like manner along the circumferential track, and the follower shaft 120 rotates synchronously on its own axis. During the revolution and rotation, the follower shaft 120 squeezes the granite residual soil in the rolling interval; the impurities in the granite residual soil are discharged from the discharge port, and the screened granite residual soil is discharged downward through multiple screening mesh openings. In this way, by placing the residual granite soil in the screening cylinder 100, as the screening cylinder 100 rotates and vibrates, the particles that meet the requirements fall to the bottom through the screening mesh, while the particles that do not meet the required particle size are discharged through the slag discharge port 102. During this process, the stirring action of the follower shaft 120 can accelerate the screening efficiency and accuracy, and at the same time, it can break up large particles to a certain extent, reducing the number of times the slag discharged from the slag discharge port 102 needs to be fed back into the screening.
[0047] In preparation step 1), the crusher includes two vertically staggered crushing plates 200, which are arranged facing each other to form a crushing chamber; a top opening connecting the upper ends of the two crushing plates 200 to the top of the crushing chamber is formed, and a bottom opening connecting the lower ends of the two crushing plates 200 to the bottom of the crushing chamber is formed.
[0048] The crushing plate 200 has a crushing surface facing the crushing chamber. Multiple inclined blocks 210 are formed on the crushing plate 200. Along the downward inclination direction of the crushing surface, the inclined blocks 210 are inclined towards the crushing chamber. The inclined blocks 210 on the two crushing surfaces are staggered towards each other.
[0049] In preparation step 1), the sieved granite residual soil enters the crushing chamber through the top opening. Two crushing plates 200 are staggered and rubbed together, while multiple inclined blocks 210 on the crushing surface squeeze and crush the granite residual soil. The crushed granite residual soil is then discharged through the bottom opening. This method of crushing the granite residual soil through the squeezing of the two crushing plates 200 and the upward and downward friction of the inclined blocks 210 makes the soil material finer and more uniform, which helps improve the mixing effect and the performance of the final product.
[0050] The inclined block 210 has a downward-facing bottom surface 211, which protrudes downward in an arc-shaped convex shape. In preparation step 1), when the two crushing plates 200 are staggered vertically and rubbing the granite residual soil, the bottom surface 211 pushes the granite residual soil downward and compresses it. Thus, as the crushing plates 200 move up and down, compared to the flat bottom surface 211, the arc-shaped convex bottom surface 211 protrudes outward and can compress the granite residual soil during downward movement, causing the crushed granite residual soil to move and be discharged quickly.
[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A method for preparing high-strength fluidized solidified soil containing granite residual soil, characterized in that, The preparation steps include the following: 1) Prepare the component materials, which, by mass percentage, include 50%-70% granite residual soil, 10%-20% curing agent, 20%-30% water and 0.1%-0.5% water-reducing agent; According to mass percentage, the curing agent comprises 0%-10% quicklime, 0%-50% silicate cement, 30%-75% slag powder, 0%-20% carbide slag, 0%-50% fly ash, and 5%-20% desulfurized gypsum; the water-reducing agent is a naphthalene-based water-reducing agent, a melamine water-reducing agent, or a polycarboxylate water-reducing agent; 2) The components are placed in a mixer and mixed to form a slurry-like high-strength fluidized solidified soil; In the preparation step 1), a soil screening machine is used to screen the selected granite residual soil to remove particles with a diameter greater than 20 mm from the granite residual soil. In the preparation step 1), the soil screening machine includes a screening cylinder arranged in a rolling manner, which is inclined vertically along the length of the screening cylinder; the screening cylinder has a screening chamber arranged in an inclined vertically, the upper end of the screening cylinder has a feed inlet, the lower end of the screening cylinder has a slag discharge outlet, and a plurality of screening mesh holes are formed on the outer periphery of the screening cylinder, which are distributed throughout the outer periphery of the screening cylinder; The feed inlet and slag outlet are each provided with a circumferential ring, which is arranged around the circumference of the screening cylinder. A circular track is provided in the circumferential ring, which is arranged around the circumference of the circumferential ring and is arranged in a wavy curve along the circumferential direction. A follower shaft is provided in the screening chamber, which is eccentrically arranged with respect to the central axis of the screening cylinder. The two ends of the follower shaft are respectively movably connected to the circular track, and a rolling gap is formed between the follower shaft and the inner wall of the screening chamber. In preparation step 1), after the granite residual soil is placed in the screening cylinder through the feed inlet, the screening cylinder tilts and rolls, and the granite residual soil rolls synchronously around the screen cylinder. As the screening cylinder rolls around the screen cylinder and under the action of gravity of the follower shaft, the follower shaft revolves in a wave-like manner along the circular track, and the follower shaft rotates synchronously on its own axis. During the revolution and rotation, the follower shaft squeezes the granite residual soil in the rolling interval. The slag in the granite residual soil is discharged from the slag discharge port, and the screened granite residual soil is discharged downward through multiple screening mesh openings.
2. The method for preparing high-strength fluidized solidified soil containing granite residual soil as described in claim 1, characterized in that, In preparation step 1), residual soil from the granite is selected at the construction site.
3. The method for preparing high-strength fluidized solidified soil containing granite residual soil as described in claim 2, characterized in that, The moisture content, liquid limit, plastic limit, and particle size distribution of the residual granite soil were determined to determine the dosage of curing agent, water, and water-reducing agent.
4. The method for preparing high-strength fluidized solidified soil containing granite residual soil as described in claim 1, characterized in that, In preparation step 1), a crusher is used to crush the sieved granite residual soil.
5. The method for preparing high-strength fluidized solidified soil containing granite residual soil as described in claim 4, characterized in that, In preparation step 2), the curing agent, a portion of the water, and a portion of the water-reducing agent are first added to a mixer and mixed. Then, the granite residual soil is added to the mixer and mixed. During the continuous mixing of the granite residual soil, the remaining water and the remaining water-reducing agent are added simultaneously.
6. The method for preparing high-strength fluidized solidified soil containing granite residual soil as described in claim 5, characterized in that, In preparation step 2), during the continuous stirring and mixing of the granite residual soil, the remaining water and the remaining water-reducing agent are added to the mixer in batches simultaneously. After all the water and water-reducing agent are added to the mixer, the mixer continues to mix for a set time to form the high-strength fluidized solidified soil by mixing the granite residual soil, solidifying agent, water and water-reducing agent.
7. The method for preparing high-strength fluidized solidified soil containing granite residual soil as described in claim 4, characterized in that, In the preparation step 1), the crusher includes two vertically staggered crushing plates, which are arranged facing each other to form a crushing chamber; a top opening communicating with the crushing chamber is formed between the upper ends of the two crushing plates, and a bottom opening communicating with the crushing chamber is formed between the lower ends of the two crushing plates. The crushing plate has a crushing surface facing the crushing chamber, and a plurality of inclined blocks are formed on the crushing plate. Along the downward inclination direction of the crushing surface, the inclined blocks are inclined towards the crushing chamber; the inclined blocks on two crushing surfaces are staggered towards each other. In preparation step 1), the sieved granite residual soil enters the crushing chamber through the top opening. The two crushing plates are staggered and rubbed together. Multiple inclined blocks on the crushing surface squeeze and crush the granite residual soil. The crushed granite residual soil is discharged through the bottom opening.
8. The method for preparing high-strength fluidized solidified soil containing granite residual soil as described in claim 7, characterized in that, The inclined block has a bottom surface facing downwards, and the bottom surface protrudes downwards in an arc-shaped convex shape. In the preparation step 1), when the two broken plates are misaligned and rubbed against the residual granite soil, the bottom surface pushes the residual granite soil downwards and squeezes it.