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CN-122013623-A - Embankment soil body grid layer reinforcing structure, embankment reinforcing method and construction equipment

CN122013623ACN 122013623 ACN122013623 ACN 122013623ACN-122013623-A

Abstract

The invention provides a embankment soil body grid layer reinforcing structure, an embankment reinforcing method and construction equipment, and belongs to the technical field of building materials. The road embankment soil body grating layer reinforcing structure comprises an upper layer of a soil filling layer, a lower layer of a soil filling layer, a double-shaft geogrid positioned between the two layers of the soil filling layer and a rigid crystal skeleton filled in the two layers of the soil filling layer and penetrating through holes of the double-shaft geogrid to form a soil body-grating-mineralization layer integral anchoring structure, wherein the mixed soil body comprises nano metakaolin and the soil filling, and the rigid crystal skeleton is in-situ mineralization crystallization of calcium chloride and sodium carbonate penetrating into the soil filling layer and the holes. The soil body-grid-mineralized layer integral anchoring structure has excellent compressive strength and shear strength, and can effectively strengthen the embankment side slope.

Inventors

  • YU XIAOXUAN
  • LI ZHENXUE
  • ZHOU HAIZUO
  • Wei Houliu
  • CHEN CHUNYUE
  • ZHU YUJIE

Assignees

  • 天津大学

Dates

Publication Date
20260512
Application Date
20260225

Claims (10)

  1. 1. A embankment soil body grid layer reinforced structure, characterized by comprising: The method comprises the steps of forming an upper layer of filling layer, a lower layer of filling layer, a double-shaft geogrid positioned between the two layers of filling layer and a rigid crystallization framework filled in the two layers of filling layer and penetrating holes of the double-shaft geogrid to form a soil body-grid-mineralization layer integral anchoring structure; wherein the mixed soil body comprises nano metakaolin and filling soil; The rigid crystallization framework is in-situ mineralized crystals of calcium chloride and sodium carbonate which permeate the filling layer and the holes.
  2. 2. The embankment soil body grating layer reinforcing structure according to claim 1, wherein the material of the biaxial geogrid is polyethylene; And a plurality of diamond-shaped holes are formed at the intersections of the transverse ribs and the longitudinal ribs of the double-shaft geogrid, and the aperture of each hole is 30-40 mm.
  3. 3. The embankment soil body grid layer reinforcing structure according to claim 1, wherein the thickness of the intersection of the transverse ribs and the longitudinal ribs of the biaxial geogrid is 3 mm-4 mm higher than the thickness of other positions of the transverse ribs and the longitudinal ribs.
  4. 4. The embankment soil body grating layer reinforcing structure according to claim 1, wherein the thickness of the embankment soil body grating layer reinforcing structure is 4 cm-10 cm.
  5. 5. A method of embankment reinforcement, comprising: Providing a mixed soil body, wherein the mixed soil body comprises nano metakaolin and filling soil; preparing a first slurry and a second slurry respectively, wherein the first slurry comprises calcium chloride hydrate and citric acid, and the second slurry comprises sodium carbonate; paving a mixed soil body on a embankment to be reinforced, and compacting to form a first filling layer; paving a double-shaft geogrid on the first filling layer; Laying the mixed soil body again on the double-shaft geogrid, compacting to form a second filling layer, and And spraying the mixed slurry obtained by mixing the first slurry and the second slurry on the second filler layer, wherein the mixed slurry permeates into the first filler layer, and mineralizing the mixed slurry, the second filler layer, the double-shaft geogrid and the first filler layer to form a soil body-grid-mineralized layer integral anchoring structure.
  6. 6. The embankment reinforcing method according to claim 5, wherein the soil body-grid-mineralization layer integral anchoring structure comprises the following components in percentage by weight: 6-8% of calcium chloride hydrate solid, 4-6% of industrial sodium carbonate solid, 5-7% of nano metakaolin, 0.1-0.4% of citric acid, 35-45% of water and the balance of filling soil.
  7. 7. The embankment strengthening method according to claim 6, wherein the weight percentage of the citric acid is 0.1% -0.2% based on the total weight of the mixed soil body, the first slurry and the second slurry under the condition that the ambient temperature is lower than 10 ℃; under the condition that the ambient temperature is higher than 30 ℃, the weight percentage of the citric acid is 0.3% -0.4% based on the total weight of the mixed soil body, the first slurry and the second slurry; And under the condition that the environment temperature is 10-30 ℃, the weight percentage of the citric acid is 0.2-0.3% based on the total weight of the mixed soil body, the first slurry and the second slurry.
  8. 8. The embankment reinforcing method according to claim 5, wherein the purity of the calcium chloride hydrate is 94% or more, The particle size of the calcium chloride hydrate is 1 mm-3 mm.
  9. 9. The embankment reinforcing method according to claim 5, wherein the spraying pressure of the mixed slurry sprayed on the second filling layer is 0.3-0.5 mpa, and the coverage rate of the mixed slurry on the second filling layer is more than or equal to 95%; The infiltration of the mixed slurry into the first fill layer includes: and the mixed slurry permeates to a mixed material layer formed by the second filler layer, the double-shaft geogrid and the first filler layer, and the permeation thickness is more than 80%.
  10. 10. Construction equipment for implementing the embankment reinforcing method according to any one of claims 5 to 9, characterized by comprising: A first slurry supply system comprising: a first tank (2) for loading a first slurry, A first transfer line (8) for transferring the first slurry; A second slurry supply system comprising: a second tank (4) for loading a second slurry; a second transfer line (9) for transferring the second slurry; And a spray head for receiving the first slurry and the second slurry, the first slurry and the second slurry being output from the spray head after the spray head is mixed.

Description

Embankment soil body grid layer reinforcing structure, embankment reinforcing method and construction equipment Technical Field The invention relates to the technical field of building materials, in particular to a embankment soil body grid layer reinforcing structure, an embankment reinforcing method and construction equipment. Background In recent years, biological enzyme/bacteria reinforcement technology is focused on due to environmental protection and bionic characteristics, but practical engineering application faces the core bottlenecks that enzyme preparation raw materials are high in cost, logistics and management difficulties are improved due to cold chain transportation and activity maintenance, reaction temperature adaptability is poor, enzyme activity is affected at low temperature or slightly high temperature, ion interference resistance is weak, and enzyme is easily inactivated by Fe 3+、Cu2+ plasma in soil when the technology is applied to practical embankment engineering, so that reinforcement effect is poor. In embankment engineering, geosynthetic material (geogrid) laying is an important means of improving soil stability. For a soft soil embankment, double-layer geogrids have to be paved to disperse stress to meet the requirement of bearing capacity, but the method has three major defects that the interlayer interface sliding risk is that the double-layer geogrids depend on physical friction and are easy to generate relative displacement under long-term load, the comprehensive cost is high, the grating consumption is increased, special connecting members are needed, the layering paving efficiency is low, and the interlayer compactness is difficult to be uniform. Biological enzyme or bacterial reinforcement is difficult to apply on a large scale due to cost, activity maintenance and environmental sensitivity, and meanwhile, the traditional double-layer grating provides bearing capacity but has redundant structure and high cost. Disclosure of Invention In view of the above, in order to at least partially solve the above-mentioned technical problems, the present invention provides a embankment soil body grating layer reinforcing structure, an embankment reinforcing method and construction equipment, wherein the embankment soil body grating layer reinforcing structure forms a penetrating type mechanical anchoring structure in holes of a filling layer and a single-layer geogrid through an inorganic mineralization reaction, so that a reinforcement effect of the single-layer geogrid is significantly improved. According to one aspect of the present invention, there is provided a embankment soil body grating layer reinforcing structure, comprising: The upper layer of the soil filling layer, the lower layer of the soil filling layer, the double-shaft geogrid positioned between the two layers of the soil filling layer and the rigid crystallization framework filled in the two layers of the soil filling layer and penetrating through holes of the double-shaft geogrid form a soil body-grid-mineralization layer integral anchoring structure; wherein the mixed soil body comprises nano metakaolin and filling soil, and the rigid crystal skeleton is in-situ mineralized crystal of calcium chloride and sodium carbonate which permeate into the filling soil layer and holes. According to another aspect of the present invention, there is provided a embankment reinforcing method, comprising: Providing a mixed soil body, wherein the mixed soil body comprises nano metakaolin and filling soil; preparing a first slurry and a second slurry respectively, wherein the first slurry comprises calcium chloride hydrate and citric acid, and the second slurry comprises sodium carbonate; paving a mixed soil body on a embankment to be reinforced, and compacting to form a first filling layer; Paving a double-shaft geogrid on the first filling layer; Laying the mixed soil body again on the double-shaft geogrid, compacting to form a second filling layer, and And spraying the mixed slurry obtained by mixing the first slurry and the second slurry on the second filler layer, and penetrating the mixed slurry into the first filler layer, wherein the mixed slurry, the second filler layer, the double-shaft geogrid and the first filler layer are mineralized to form a soil body-grid-mineralized layer integral anchoring structure. According to still another aspect of the present invention, there is provided a construction apparatus for implementing the above-described embankment reinforcement method, comprising: The first slurry supply system comprises a first storage tank, a first conveying pipeline, a second conveying pipeline, a first slurry supply system and a second slurry supply system, wherein the first storage tank is used for loading first slurry; The second slurry supply system comprises a second storage tank, a second conveying pipeline, a first slurry supply pipeline, a second slurry supply pipeline and a second slurry supply pipelin