A reinforced column of constraint solidification of chlor-alkali salt saline soil and a construction method thereof

Abstract

The application discloses a constraint solidified chloro-saline soil reinforced column for resource utilization of chloro-saline soil and a construction method thereof, and belongs to the field of traffic engineering. Specifically, for the chloro-saline soil with a salt content of 3-48%, the chloro-saline soil is used as a column material, industrial solid waste is used as a solidifying agent material, a corrosion-resistant pipe with good mechanical properties is used as a constraint pipe, and a corrosion-resistant reinforcement with good mechanical properties is used as a vertical reinforcement and is uniformly arranged in the constraint pipe and closely attached to the inner wall of the constraint pipe. The reinforcement includes, but is not limited to, steel reinforcement, bamboo reinforcement, FRP reinforcement and combinations of different types of reinforcement, and the reinforcement ratio ranges from 0.6 to 4.2%. According to the buried depth, height and design value of the bearing capacity of the reinforced column, the material composition and size of the constraint pipe, the type and number of reinforcement, the material composition of the cementing component and the expanding component in the solidifying agent, the solidifying agent content and the water-cement ratio are determined. The solidifying agent is uniformly mixed with the chloro-saline soil at a fixed water-cement ratio, filled into the constraint pipe and extruded and compacted to form the constraint solidified chloro-saline soil reinforced column.

Description

Technical Field

[0001] This invention relates to a reinforced column for confined and solidified chloride-soaked soil that utilizes chloride salts and its construction method, belonging to the field of transportation engineering. Background Technology

[0002] Saline soil areas account for about half of my country's land area, a considerable portion of which is chloride-saline soil with a salt content as high as 48%. Chloride ions in saline soil, especially high-content chloride salts, often cause severe physical and chemical corrosion to cement-based materials such as reinforced concrete made from silicate cement. This poses a huge threat to the safe service of reinforced concrete columns used in infrastructure construction in this region.

[0003] To better utilize soil resources, constrained solidification technology organically combines a solidifying agent containing an expansive component with a constraining body. On one hand, under constrained conditions, the expansive component expands during hydration, reducing the porosity of the solidified soil and thus significantly improving its strength. On the other hand, the lateral constraint provided by the constraining body significantly improves the vertical bearing capacity of the solidified soil, as detailed in patents "Construction Method of Solidified Soil Piles" (ZL201610183422.6) and "Treatment Method of Contaminated Soil" (201610184702.9). However, due to the corrosive effect of chloride ions on silicate cement, constrained solidification technology cannot be used for chloride-salt soils, especially those with high chloride content. Furthermore, constrained solidification technology uses silicate cement as a binder, which generates significant carbon emissions during its production. Therefore, developing a new column structure that is resistant to chloride erosion, low in carbon, and possesses good bearing capacity is of great significance.

[0004] Based on this, the present invention proposes a method for constructing a reinforced column in chloride-salt-confined soil that utilizes chloride salts for resource recovery. Summary of the Invention

[0005] This invention proposes a method for constructing a reinforced column for confined solidification of chloride-soaked soil by utilizing chloride salts, which solves the technical problem that confined solidification technology cannot be used to reinforce chloride-soaked soil. It realizes the resource utilization of chloride salts and provides good bearing capacity and durability in high chloride salt environments. At the same time, it utilizes industrial waste residue as a solidification agent, thereby significantly saving engineering costs and carbon emissions.

[0006] This invention proposes a method for constructing reinforced columns in chloride-saline soil using a method that utilizes chloride salts for resource recovery. Specifically, for chloride-saline soils with a salt content of 3-48%, a corrosion-resistant pipe with good mechanical properties is used as the confining pipe. Corrosion-resistant reinforcing materials with good mechanical properties are used as vertical reinforcements, tightly attached to the inner wall of the confining pipe and evenly distributed around its perimeter, with a reinforcement ratio ranging from 0.6% to 4.2%. The curing agent consists of an expansion component and a cementing component. A material that rapidly hydrates and generates expanding hydrates with chloride ions in the soil is used as the expansion component of the curing agent, while a material with a slow hydration rate is used. The cementing component of the curing agent is used as the binder, and the mass ratio of the expansion component and the cementing component in the curing agent is 15~70:30~85, respectively. Chloride-containing soil is used as the column preparation material. The moisture content of the chloride-containing soil and the water-cement ratio of the curing agent are controlled. The curing agent is mixed with the chloride-containing soil at a fixed water-cement ratio and near the optimum moisture content, and then filled into the confined tube and compacted in layers to form a confined and cured chloride-containing soil reinforced column. The confined and cured chloride-containing soil reinforced column has high strength and good horizontal bearing capacity, realizing the technical effect of resource utilization of chloride salt and significantly improving the utilization efficiency of curing agent expansion energy.

[0007] The construction method of the constrained and solidified chloride-salt soil reinforced column of the present invention is as follows: First, conduct an engineering survey of the chloride-salt soil foundation to understand the salt content, ion types, and physical properties of the chloride-salt soil; second, determine the design values ​​of the underground burial depth and above-ground height of the constrained and solidified chloride-salt soil reinforced column, as well as the design values ​​of the solidified chloride-salt soil strength, column body strength, and horizontal bearing capacity of the constrained and solidified chloride-salt soil reinforced column, and determine the material composition and size of the constraining tube, the type and quantity of reinforcement, the material composition of the cementing and expansion components in the curing agent, the dosage of the curing agent, and the water-cement ratio; finally, uniformly place the reinforcement material around the inner wall of the constraining tube, determine the construction parameters through field tests, mix the curing agent with the chloride-salt soil at a fixed water-cement ratio, fill the constraining tube in layers, and compact it to form the constrained and solidified chloride-salt soil reinforced column, and test the performance of the constrained and solidified chloride-salt soil reinforced column when it reaches the curing age.

[0008] The constraint tube of the present invention includes, but is not limited to, rigid materials, flexible materials, and combinations of the two types of materials; the reinforcing material includes, but is not limited to, steel reinforcement, bamboo reinforcement, FRP reinforcement, and combinations of different types of reinforcing materials. When the inherent durability of the constraint tube and the reinforcing material is insufficient, the constraint tube and the reinforcing material need to be treated with anti-corrosion measures.

[0009] The expansion component described in this invention is a material that rapidly hydrates with chloride ions in soil to generate expansion hydrates. The expansion hydrates generated by hydration include, but are not limited to, hydrated calcium chloroaluminate and hydrated calcium sulfoaluminate. The expansion component includes, but is not limited to, a mixture composed of aluminum-containing waste residue, alkaline waste residue, gypsum-based waste residue, or sulfate waste residue.

[0010] The cementing component of this invention is a material with a slow hydration rate, and the cementitious hydrates produced by its hydration include, but are not limited to, hydrated calcium silicate. The cementing component is composed of cementing materials and activators, with the mass ratio of cementing materials and activators in the cementing component being 70~100:0~30, respectively. The cementing materials include, but are not limited to, one or more combinations of slag, copper slag, phosphorus slag, coal gangue, bottom ash, rice husk ash, kiln ash, etc. The activator is an alkaline activator, including, but not limited to, one or more combinations of quicklime, hydrated lime, active magnesium oxide, sodium hydroxide, hydrated sodium silicate, etc.

[0011] When the constraint tube material described in this invention is a rigid material or a combination of rigid and flexible materials, it is optional to provide circumferential structural ribs inside the constraint tube; when the constraint tube material is a flexible material, circumferential structural ribs must be provided inside the constraint tube; when the structural ribs themselves have insufficient durability, the structural ribs need to be treated with anti-corrosion measures; the anti-corrosion measures include, but are not limited to, forming an anti-corrosion layer by using epoxy resin, chlorinated polyolefin, polyurethane resin, fluorocarbon resin coating, acrylic resin, polyurea waterproof and anti-corrosion coating, anti-corrosion structural adhesive, etc.

[0012] When the constraint tube and reinforcing material described in this invention have good durability in a chloride salt environment, they do not require anti-corrosion treatment and can be directly used in the preparation of reinforced columns for constrained and solidified chloride salt soil.

[0013] The vertical reinforcement described in this invention penetrates through each cross section of the constraint tube of the reinforced column in the constrained and solidified chloride-salt soil.

[0014] The rigid materials described in this invention include, but are not limited to, steel pipes, polyvinyl chloride pipes, polyethylene pipes, reinforced high-density polyethylene pipes, polybutene pipes, polypropylene pipes, and fiber-braided pultruded pipes; the flexible materials include, but are not limited to, basalt fiber composite fabrics, glass fiber composite fabrics, carbon fiber composite fabrics, etc.; the ratio of the ultimate constraint stress provided by the constraint pipe to the strength of the solidified chloride-salt soil is greater than 0.6.

[0015] The dosage of the curing agent described in this invention is 10-100% of the total dry weight of the curing agent and the chloride-saline soil; all components of the curing agent are industrial grade, and all curing agent materials have a specific surface area greater than 150 m². 2 / kg of powder.

[0016] The expansion component described in this invention needs to be determined according to the chloride ion content in the chloride-saline soil and the chemical equation for the formation of expansion hydrates by hydration, and the specific ratio of each component material in the expansion component needs to be determined by a known calculation method; the cementing component needs to be determined by selecting an activator according to the hydration rate designed for the cementing component and by determining the specific ratio of cementing material and activator in the cementing component through preliminary experiments.

[0017] The method for controlling the moisture content of chloride-saline soil described in this invention includes, but is not limited to, air drying and water spraying.

[0018] The water-cement ratio control of the curing agent described in this invention refers to controlling the water-cement ratio according to the composition of the curing agent to meet the minimum water consumption required for all curing agent materials to complete hydration; the layered compaction method includes, but is not limited to, methods such as heavy hammer compaction, static pressure equipment compaction, and reverse spiral compaction equipment compaction, and the construction parameters are determined through on-site tests.

[0019] The application scope of the reinforced columns for constrained and solidified chloride-salt soil described in this invention includes, but is not limited to, airport engineering, road engineering, and industrial building engineering.

[0020] The advantages of this invention are: This invention solves the technical problems of poor load-bearing capacity and insufficient durability of constrained solidification technology in chloride-saline soils, realizes the resource utilization of chloride salts and saves building materials and engineering costs. At the same time, it realizes the use of industrial waste residue as a solidification agent to completely replace silicate cement, thereby significantly reducing carbon emissions. Thus, it provides a new low-carbon, economical, durable and load-bearing column technology for chloride-saline soil areas with high salt content.

[0021] It should be noted that this invention is mainly for chloride-saline soils with a salt content of 3-48%. This invention is also applicable to chloride-saline soil foundations with a salt content of less than 3%. Detailed Implementation

[0022] The following detailed description, using specific embodiments, illustrates the resource-utilizing chloride salt-reinforced column for confined and solidified chloride-alkali soil and its construction method, as described in this invention. However, the application forms and scope of the confined and solidified chloride-alkali soil-reinforced column provided by this invention are not limited to this.

[0023] Example 1 A road construction project involves reinforcing chloride-alkali soil using a method described in this invention: a resource-based chloride-utilizing, constrained-solidification reinforced column for chloride-alkali soil and its construction. Engineering surveys revealed that the chloride-alkali soil contains 5.09% salt, with the main ionic component and content being Ca. 2+ 0.48%, Mg 2+ 0.32%, K + and Na + 1.12%, Cl - 3.20%, 0.01%, The moisture content of the chloride-saline soil is 25%, with a concentration of 0.01%. The design depth of the reinforced column for confined and solidified chloride-saline soil is 6m, the height above ground is 1m, and the column diameter is 250mm. The strength of the solidified chloride-saline soil and the strength of the reinforced column are 25MPa and 55MPa, respectively. The critical horizontal load of the reinforced column for confined and solidified chloride-saline soil is 8kN.

[0024] A 12mm thick HDPE pipe was selected as the confinement pipe, and six 10mm diameter CFRP bars were chosen as vertical reinforcement. The expansion components, by weight, consisted of 2.6 parts aluminum-containing waste residue, 1.8 parts alkaline waste residue, and 2.6 parts gypsum-based waste residue; the binding components were 3.0 parts slag, 4.0 parts copper slag, and 3.0 parts hydrated sodium silicate. The curing agent dosage was 48% of the total dry weight of the curing agent and chloride-salt soil, with a water-cement ratio of 0.42. The reinforcement was evenly placed on the inner wall of the confinement pipe and tightly adhered to its perimeter. Construction parameters were determined through field tests. The curing agent, mixed with the chloride-salt soil at a fixed water-cement ratio, was uniformly filled into the confinement pipe and compacted in layers to form a confinement-cured chloride-salt soil reinforced column. Testing showed that after 28 days of curing, the strength of the cured chloride-salt soil, the column body strength of the confinement-cured chloride-salt soil reinforced column, and the horizontal critical load of the confinement-cured chloride-salt soil reinforced column all met the requirements.

[0025] Example 2 A certain airport project plans to reinforce its chloride-salt-affected soil using the method described in this invention, which involves the resource utilization of chloride salts to create confined and solidified reinforced columns. Engineering surveys revealed that the chloride-salt-affected soil contains 22.96% salt, with the main ionic component and content being Ca. 2+ 4.62%, Mg 2+ 1.24%, K + and Na + 2.26%, Cl - 14.82%, 0.01%, The moisture content of the chloride-saline soil is 23%, with a concentration of 0.01%. The design depth of the reinforced column for confined and solidified chloride-saline soil is 8m, the height above ground is 3m, and the column diameter is 300mm. The strength of the solidified chloride-saline soil and the strength of the reinforced column are 18MPa and 45MPa, respectively. The critical horizontal load of the reinforced column for confined and solidified chloride-saline soil is 5kN.

[0026] 8mm thick CFRP pipes were selected as the confinement pipes, and eight bamboo strips were used as vertical reinforcements. Bamboo strips were also installed inside the confinement pipes as circumferential structural reinforcements. The vertical and structural reinforcements were treated with anti-corrosion measures. The curing agent, by weight, consisted of 4.5 parts aluminum-containing waste residue, 1.8 parts alkaline waste residue, and 5.3 parts sulfate waste residue; the cementing components were 2.0 parts phosphorus slag, 6.0 parts rice husk ash, and 2.0 parts active magnesium oxide. The curing agent dosage was 25% of the total dry weight of the curing agent and chloride-saline soil, with a water-cement ratio of 0.45. The reinforcements were evenly placed on the inner wall of the confinement pipe and tightly adhered to its perimeter. Construction parameters were determined through field tests. The curing agent was mixed with the chloride-saline soil at a fixed water-cement ratio and uniformly filled into the confinement pipe, layered and compacted to form a confinement-cured chloride-saline soil reinforced column. Tests showed that the strength of the solidified chloride-salt soil, the strength of the reinforced column body of the solidified chloride-salt soil, and the horizontal critical load of the reinforced column of the solidified chloride-salt soil all met the requirements after 28 days of curing.

[0027] Example 3 A certain industrial building project plans to reinforce the chloride-salt soil using the resource-utilizing chloride-constrained solidification reinforced column and its construction method described in this invention. Engineering surveys revealed that the chloride-salt soil has a salt content of 47.92%, with the main ionic component and content being Ca. 2+ 10.05%, Mg 2+ 2.42%, K + and Na + 5.58%, Cl - 29.84%, 0.02%, The moisture content of the chloride-salt soil is 30%, with a concentration of 0.01%. The reinforced column for confined and solidified chloride-salt soil, utilizing the resource-based chloride salts described in this invention, and its construction method, are used for reinforcement. The designed underground burial depth of the reinforced column is 10m, the above-ground height is 2m, and the column diameter is 400mm. The strength of the solidified chloride-salt soil and the strength of the reinforced column are 30MPa and 75MPa, respectively. The horizontal critical load of the reinforced column is 15kN.

[0028] A 15mm thick steel pipe wrapped with three layers of CFRP fabric was selected as the confinement pipe. Five 10mm diameter GFRP bars and five bamboo bars were used as vertical reinforcement. The steel pipe and bamboo bars were treated with anti-corrosion. The curing agent, by weight, consisted of 4.8 parts aluminum-containing waste residue and 5.5 parts alkaline waste residue as its expansion component, and 5.0 parts slag, 3.5 parts rice husk ash, and 1.5 parts quicklime as its binding component. The curing agent dosage was 66% of the total dry weight of the curing agent and the chloride-salt soil, with a water-cement ratio of 0.46. The reinforcement was evenly placed on the inner wall of the confinement pipe and tightly adhered to its perimeter. Construction parameters were determined through field tests. The curing agent, mixed with the chloride-salt soil at a fixed water-cement ratio, was then uniformly filled into the confinement pipe and compacted in layers to form a confinement-cured chloride-salt soil reinforced column. Testing showed that after 28 days of curing, the strength of the cured chloride-salt soil, the column body strength of the confinement-cured chloride-salt soil reinforced column, and the horizontal critical load of the confinement-cured chloride-salt soil reinforced column all met the requirements.

[0029] Example 4 A road construction project aims to reinforce chloride-saltified soil using a method described in this invention, which involves the resource utilization of chloride salts to constrain and solidify reinforced columns and their construction. Engineering investigation of the chloride-saltified soil revealed a salt content of 32.16%, with the main ionic component and content being Ca. 2+ 6.24%, Mg 2+ 2.18%, K + and Na + 2.65%, Cl - 21.06%, 0.02%, The moisture content of the chloride-saline soil is 32%, with a concentration of 0.01%. The design depth of the reinforced column for confined and solidified chloride-saline soil is 5m, the height above ground is 1m, and the column diameter is 350mm. The strength of the solidified chloride-saline soil and the strength of the reinforced column are 45MPa and 88MPa, respectively. The critical horizontal load of the reinforced column for confined and solidified chloride-saline soil is 12kN.

[0030] A 12mm thick CFRP pipe wrapped with 8 layers of BFRP fabric was selected as the confinement pipe. Ten 8mm diameter GFRP bars and eight bamboo bars were selected as vertical reinforcements. Bamboo bars were installed inside the confinement pipe as circumferential structural reinforcements and were treated with anti-corrosion agents. The curing agent, by weight, consisted of 6.2 parts aluminum-containing waste residue, 3.3 parts alkaline waste residue, and 2.5 parts gypsum-based waste residue; the cementing components were 7.0 parts slag, 2.0 parts calcined ash, and 1.0 part calcium oxide. The curing agent dosage was 86% of the total dry weight of the curing agent and chloride-saline soil, with a water-cement ratio of 0.50. The reinforcement materials were evenly placed on the inner wall of the confinement pipe and tightly adhered to the perimeter. Construction parameters were determined through field tests. The curing agent was mixed with the chloride-saline soil at a fixed water-cement ratio and uniformly filled into the confinement pipe, layered and compacted to form a confinement-cured chloride-saline soil reinforced column. Tests showed that the strength of the solidified chloride-salt soil, the strength of the reinforced column body of the solidified chloride-salt soil, and the horizontal critical load of the reinforced column of the solidified chloride-salt soil all met the requirements after 28 days of curing.

Claims

1. A method for constructing a reinforced column in chloride-confined soil using chloride salts for resource utilization, characterized in that: For chloride-saline soils with a salt content of 3-48%, chloride-saline soil is used as the column preparation material, corrosion-resistant pipes with good mechanical properties are used as the confinement pipes, industrial solid waste is used as the solidifying agent material, and corrosion-resistant reinforcing materials with good mechanical properties are used as vertical reinforcements tightly attached to the inner wall of the confinement pipe and evenly distributed around the inner wall of the confinement pipe, with a reinforcement ratio ranging from 0.6% to 4.2%. The solidifying agent consists of an expansion component and a cementing component, with the mass ratio of the expansion component to the cementing component in the solidifying agent being 15-70:30-85, respectively. Materials that rapidly hydrate and generate expanding hydrates with chloride ions in the soil are used as the expansion component of the solidifying agent; the expanding hydrates generated by hydration include, but are not limited to, hydrated calcium chloroaluminate and hydrated calcium sulfoaluminate. Materials with slow hydration rates are also used. The material, as the cementing component of the curing agent, produces cementitious hydrates upon hydration, including but not limited to calcium silicate hydrate; the constraint tube includes, but is not limited to, rigid and flexible materials, as well as combinations of both; the reinforcement includes, but is not limited to, steel reinforcement, bamboo reinforcement, FRP reinforcement, and combinations of different types of reinforcement. When the inherent durability of the constraint tube and reinforcement is insufficient, anti-corrosion treatment is required; the moisture content of the chloride-salt soil and the water-cement ratio of the curing agent are controlled. The curing agent is mixed evenly with the chloride-salt soil at a fixed water-cement ratio, filled into the constraint tube, and compacted in layers to form a constraint-cured chloride-salt soil reinforced column; the constraint-cured chloride-salt soil reinforced column has high strength and good load-bearing capacity and realizes the resource utilization of chloride; the specific construction method of the constraint-cured chloride-salt soil reinforced column is as follows: First, conduct an engineering survey of the chloride-salt soil to understand its salt content, ion types, and physical properties. Secondly, the design values ​​of the underground burial depth and above-ground height of the reinforced column of constrained and solidified chloride-salt soil are determined according to the needs, as well as the design values ​​of the solidified chloride-salt soil strength, column body strength, and horizontal bearing capacity of the reinforced column of constrained and solidified chloride-salt soil. The material composition and size of the constrained tube, the type and quantity of reinforcement, the material composition of the cementing component and expansion component in the curing agent, the dosage of curing agent, and the water-cement ratio are also determined. Finally, the reinforcing material is evenly placed around the inner wall of the confining tube. The construction parameters are determined through on-site tests. The curing agent is mixed with the chloride-salt soil at a fixed water-cement ratio and evenly filled into the confining tube and compacted in layers to form a confined and cured chloride-salt soil reinforced column. The performance of the confined and cured chloride-salt soil reinforced column is tested when the curing age is reached.

2. The method for constructing a reinforced column in chloride-confined soil using chloride salts for resource utilization, as described in claim 1, is characterized in that: The expansion component includes, but is not limited to, a mixture composed of aluminum-containing waste residue, alkaline waste residue, gypsum-based waste residue, or sulfate waste residue; the cementing component is composed of cementing material and activator, with the mass ratio of cementing material and activator in the cementing component being 70~100:0~30; the cementing material includes, but is not limited to, one or more combinations of slag, copper slag, phosphorus slag, coal gangue, furnace bottom ash, rice husk ash, kiln ash, etc.; the activator is an alkaline activator, including, but not limited to, one or more combinations of quicklime, hydrated lime, activated magnesium oxide, sodium hydroxide, hydrated sodium silicate, etc.; when the constraint tube material is a rigid material or a combination of rigid and flexible materials, it can self-... The choice is whether to install circumferential structural ribs inside the constraint tube; when the constraint tube material is a flexible material, circumferential structural ribs must be installed inside the constraint tube; when the structural ribs themselves have insufficient durability, they need to be treated with anti-corrosion measures, including but not limited to forming an anti-corrosion layer by using epoxy resin, chlorinated polyolefin, polyurethane resin, fluorocarbon resin coating, acrylic resin, polyurea waterproof and anti-corrosion coating, anti-corrosion structural adhesive, etc.; when the constraint tube and ribs have good durability in a chloride salt environment, they do not need to be treated with anti-corrosion measures and can be directly used in the preparation of the constraint-cured chloride salt soil reinforced column; the vertical ribs penetrate through each cross section of the constraint tube of the constraint-cured chloride salt soil reinforced column.

3. The method for constructing a reinforced column for confined and solidified chloride-soaked soil using resource-utilizing chloride salts, as described in claim 1, is characterized in that: The rigid materials include, but are not limited to, steel pipes, polyvinyl chloride pipes, polyethylene pipes, reinforced high-density polyethylene pipes, polybutene pipes, polypropylene pipes, and fiber-braided pultruded pipes; the flexible materials include, but are not limited to, basalt fiber composite fabrics, glass fiber composite fabrics, carbon fiber composite fabrics, etc.; the ratio of the ultimate constraint stress provided by the constraint pipe to the strength of the solidified chloride-salt soil is greater than 0.

6.

4. The method for constructing a reinforced column for confined and solidified chloride-soaked soil using resource-utilizing chloride salts, as described in claim 1, is characterized in that: The dosage of the curing agent is 10-100% of the total dry weight of the curing agent and the chloride-salt soil; all components of the curing agent are industrial grade, and all curing agent materials have a specific surface area greater than 150 m². 2 / kg of powder.

5. The method for constructing a reinforced column for confined and solidified chloride-soaked soil using resource-utilizing chloride salts according to claim 1, characterized in that: The expansion component needs to be determined according to the chloride ion content in the chloride-saline soil and the chemical equation for the formation of expansion hydrates by hydration, and the specific ratio of each component material in the expansion component needs to be determined by a known calculation method; the cementing component needs to be determined by selecting an activator according to the designed hydration rate of the cementing component and by determining the specific ratio of cementing material and activator in the cementing component through preliminary experiments.

6. The method for constructing a reinforced column in chloride-confined soil using chloride salts for resource utilization, as described in claim 1, is characterized in that: The methods for controlling the moisture content of chloride-salt soil include, but are not limited to, air drying and water spraying; the method for controlling the water-cement ratio of the curing agent refers to controlling the water-cement ratio according to the composition of the curing agent to meet the minimum water consumption required for all curing agent materials to be fully hydrated.

7. The method for constructing a reinforced column for confined and solidified chloride-soaked soil using resource-utilizing chloride salts according to claim 1, characterized in that: The layered compaction method includes, but is not limited to, methods such as heavy hammer compaction, static pressure equipment compaction, and reverse spiral compaction equipment compaction, and the construction parameters are determined through field tests; the application scope of the constrained and solidified chloride-salt soil reinforced columns includes, but is not limited to, airport engineering, road engineering, and industrial building engineering.