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CN-121976518-A - Soil stirring and reinforcing device utilizing waste fabrics and construction method

CN121976518ACN 121976518 ACN121976518 ACN 121976518ACN-121976518-A

Abstract

The invention discloses a soil stirring and reinforcing device utilizing waste fabrics and a construction method, and aims to solve the problems of low recycling rate of the waste fabrics, uneven dispersion of fibers in soil, insufficient mechanical property and low construction accuracy of the traditional reinforcing method and the like. The device comprises a waste fabric integrated construction device, a curing agent treatment integrated device, a stirring reinforcement construction device and an intelligent control and sensing system, wherein the construction method realizes soil reinforcement through the steps of waste fabric crushing pretreatment, fiber and surfactant mixed liquid preparation, drill-down spraying, curing agent dry powder preparation, lift-up spraying, intelligent water content regulation and the like. The invention realizes the resource utilization of waste fabrics, improves the fiber dispersibility by the ionic surfactant, combines an intelligent regulation and control system to ensure the construction quality, obviously improves the compressive strength, the tensile strength and the durability of the solidified soil, is suitable for various soil properties and complex working conditions, and has economic and environmental benefits.

Inventors

  • FAN RIDONG
  • MA HAIJUN
  • DENG TAO

Assignees

  • 东华大学

Dates

Publication Date
20260505
Application Date
20260203

Claims (7)

  1. 1. Soil stirring and reinforcing device utilizing waste fabrics is characterized by comprising: The waste fabric integrated construction device comprises a surfactant storage tank, fabric crushing equipment, a mixed liquid stirring container and air compression equipment, wherein the mixed liquid stirring container is a pressure-bearing closed container, and the air compression equipment is used for adjusting air pressure and flow; the curing agent treatment integrated device comprises curing agent and drying agent mixing and drying equipment, a drying agent storage tank, curing agent crushing equipment and a screen residue container, wherein the drying equipment adopts a hot air circulation mode and is provided with a humidity sensor, and a stirring device and a screen residue device are arranged in the curing agent crushing equipment; the stirring reinforcement construction device comprises a stirring drill bit and a conveying pipeline system, wherein the conveying pipeline system consists of a first conveying pipeline and a second conveying pipeline, the first conveying pipeline and the second conveying pipeline are pressure-resistant pipelines, and an adjustable spray head is arranged at the end part of each pipeline; The intelligent control and sensing system comprises a PLC, a humidity sensing system and a closed-loop injection control system, wherein the humidity sensing system comprises a sensor arranged at an outlet of drying equipment and a time domain reflectometer sensor arranged at the end part of a stirring drill bit.
  2. 2. The soil body stirring reinforcement device using waste fabrics as claimed in claim 1, wherein the fabric crushing means can crush the waste fabrics into fibrous materials with a length of 0.3 to 2.0cm, and the waste fabrics are waste blends of natural fibers and artificial fibers.
  3. 3. The soil body stirring reinforcement device using waste fabrics according to claim 1, wherein the surfactant is an ionic surfactant which is soluble in water, the use amount of the surfactant is 5 to 10% of the mass of the waste fabrics, and the air content of the fiber mixture is controlled to be 10 to 20%.
  4. 4. The soil stirring reinforcement device using waste fabrics according to claim 1, wherein the first conveying pipeline is used for spraying fiber and surfactant mixed solution when the stirring drill bit is used for downward detection, and the second conveying pipeline is used for spraying curing agent dry powder when the stirring drill bit is lifted.
  5. 5. The soil stirring and reinforcing device utilizing the waste fabric according to claim 1, wherein the pneumatic pressure of the pneumatic pump is in a range of 0.50MPa to 0.90MPa under normal working conditions and 0.65MPa to 0.85MPa under micro-nano bubble water working conditions.
  6. 6. The soil body stirring and reinforcing construction method utilizing the waste fabric is characterized by comprising the following steps of: (1) The material pretreatment, namely crushing the waste fabric into fibrous materials with the length of 0.3 to 2.0cm, mixing the solid waste curing agent with 2 to 5 percent of drying agent, and drying, crushing and screening to prepare curing agent dry powder; (2) Mixing the crushed fibers with an ionic surfactant solution, conveying the mixture to a stirring and reinforcing construction device through a pneumatic pump, and spraying the fiber mixed solution to a soil layer through a first conveying pipeline until the design depth is reached in the downward detection process of a stirring drill bit; (3) The dry powder of the curing agent is sprayed and mixed, namely, after the stirring drill reaches the designed depth, the stirring drill is converted into a lifting mode and reversely rotates, and the second conveying pipeline synchronously sprays the dry powder of the curing agent, so that the fiber, the soil body and the curing agent are fully mixed; (4) The intelligent regulation and control is that the moisture content of the soil layer is monitored in real time through a time domain reflectometer sensor, the PLC automatically adjusts the spraying quantity of the fiber mixed solution or the curing agent dry powder in unit time according to the comparison of the monitoring data and the target moisture content, the spraying quantity in unit time is 10L/min to 100L/min, and the mass ratio of the fiber mass to the reinforced soil is controlled to be 2% -4%.
  7. 7. The construction method for stirring and reinforcing soil using waste fabrics according to claim 6, wherein in the step (1), fiber lengths are divided according to soil grading characteristics, wherein sand soil is 1.0cm to 2.0cm, silt soil is 0.6cm to 1.0cm, and cohesive soil is 0.3cm to 0.6cm.

Description

Soil stirring and reinforcing device utilizing waste fabrics and construction method Technical Field The invention belongs to the technical field of waste fabric resource utilization and soil reinforcement, and particularly relates to a soil stirring and reinforcing device utilizing waste fabrics and a construction method thereof, which are suitable for engineering scenes such as soft soil foundation treatment, horizontal load reinforcement in a near-shore area and the like. Background With the increase of global population, the improvement of living standard and the rise of fashionable culture, the demand for textiles is continuously rising, and a large amount of waste fabrics are generated. It is counted that approximately 9200 ten thousand tons of textile waste are produced annually, with 2030 being expected to be 1.34 hundred million tons. But the recycling rate is extremely low, and most of mixed domestic garbage is buried or burned, so that a large amount of land resources are occupied, and serious environmental pollution is caused. With the rapid advancement of new energy infrastructure construction, the horizontal load reinforcement requirements of offshore areas are increasingly prominent. The traditional reinforcement method mainly depends on high-strength building materials and complex construction processes, but the methods have the problems of high cost, long construction period, large influence on environment and the like. In recent years, the stirring reinforcement technology is widely applied to soft soil foundation treatment and offshore reinforcement engineering by virtue of the advantages of high construction efficiency, small environmental impact and the like. However, conventional stirring reinforcement still has short plates in terms of shear strength, and in particular, its performance needs to be further improved when dealing with complex offshore environments and large horizontal loads. The traditional waste fabric treatment modes mainly comprise landfill and incineration, and the modes not only occupy a large amount of land resources, but also cause environmental pollution. Therefore, it is particularly important to find a sustainable disposal route for waste fabrics. To improve the shear strength and the overall performance of the cured soil, researchers have begun to explore the improvement of the mechanical properties of the curing agent by the addition of fibrous materials. Engineering fibers such as steel fibers, basalt fibers, polypropylene fibers and the like have higher tensile strength and modulus, and have proved to have remarkable effects in improving the toughness, crack resistance and shear strength of soil. However, these virgin fiber materials are costly, limiting their wide application in large-scale foundation treatment projects. However, the addition of the waste fiber also faces a plurality of problems, the waste blend fiber is difficult to stir in the stirring construction process due to large surface property difference and different hydrophilic and hydrophobic characteristics, and the fiber is easily clustered and cannot be uniformly dispersed by simply adopting a stirring mode, so that the fiber is gathered at a nozzle, the practical reinforcement range is limited, and the construction quality is difficult to meet the design requirement. In order to ensure that fibers are uniformly distributed in a curing agent, the problems that the fibers are easily agglomerated in the stirring construction process and cannot be uniformly stirred, so that the construction quality is inferior to the design requirement are fundamentally changed through a surfactant. The ionic surfactant can improve the compatibility of the fiber and the curing agent, and promote the uniform dispersion of the fiber in the stirring process, so that the mechanical property of the curing agent is further improved. The method comprehensively considering the material performance and the construction process provides a new idea for the application of the waste fiber in the solidified soil. Therefore, a sustainable waste fabric treatment way is needed to be searched, the problem of fiber dispersion is solved, and the soil body reinforcing effect is improved. Disclosure of Invention Aiming at the problems of low recovery and utilization rate of waste fabrics, easy agglomeration and uneven dispersion of fibers in soil reinforcement, limitation of the traditional stirring reinforcement method in terms of shear strength and application range, poor reinforcement effect of a weak soil layer with high water content and the like in the prior art, the invention aims to provide an efficient, environment-friendly and intelligent soil stirring reinforcement solution. In order to achieve the above purpose, the invention provides a soil stirring and reinforcing device utilizing waste fabrics, which comprises a waste fabric integrated construction device, a curing agent treatment integrated device, a stirring and r