Coastal soft foundation soil solidifying and reinforcing material and application thereof

A technology for strengthening materials and soft foundations, applied in the field of geotechnical engineering, can solve problems that need to be further improved, achieve good economic value and social value, enhance anti-permeability, and enhance corrosion resistance

Inactive Publication Date: 2015-09-09
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the materials of cement mixing piles are mainly cement, fly ash, and high-efficiency water reducer, and their strength, anti-penetration, corrosion resistance, and erosion resistance performance need to be further improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The solidified strengthening material for soft coastal soil includes the following components: 10 parts of cement, 6 parts of powder, 1 part of water reducing agent, 1 part of anti-seepage agent, and 2 parts of reinforcing agent, in parts by weight. The cement is silicate with a water-cement ratio of 0.4, the powder fly ash, the water reducer is an aliphatic high-efficiency water reducer, the anti-seepage agent is a hydrophobic silicone resin, and the reinforcing The agent is polypropylene fiber.

[0017] Its preparation method includes the following steps: firstly mix cement, powder and reinforcing agent, then slowly add water reducer, after 3 to 5 minutes, slowly add anti-seepage agent, stir evenly, pour into the collecting hopper, when the drilling rig is moving When the design depth is reached, the mixing head is reversed, and the mixing is lifted while spraying, and the mixing is carried out again.

[0018] After testing: 28-day compressive strength: 5.2MPa; 14-da...

Embodiment 2

[0020] The solidified strengthening material for soft coastal soil includes the following components: 10 parts of cement, 6 parts of powder, 1 part of water reducing agent, 1 part of anti-seepage agent, and 2 parts of reinforcing agent, in parts by weight. The cement is silicate with a water-cement ratio of 0.4, the powder is slag powder, the water reducer is an aliphatic high-efficiency water reducer, the anti-seepage agent is a hydrophobic silicone resin, and the reinforcing agent for polypropylene fibers.

[0021] Its preparation method includes the following steps: firstly mix cement, powder and reinforcing agent, then slowly add water reducer, after 3 to 5 minutes, slowly add anti-seepage agent, stir evenly, pour into the collecting hopper, when the drilling rig is moving When the design depth is reached, the mixing head is reversed, and the mixing is lifted while spraying, and the mixing is carried out again.

[0022] After testing: 28-day compressive strength: 6.3MPa; ...

Embodiment 3

[0024] The solidified strengthening material for soft coastal soil includes the following components: 10 parts of cement, 6 parts of powder, 1 part of water reducing agent, 1 part of anti-seepage agent, and 2 parts of reinforcing agent, in parts by weight. The cement is silicate with a water-cement ratio of 0.4, the powder is cinder powder, the water reducer is an aliphatic high-efficiency water reducer, the anti-seepage agent is a hydrophobic silicone resin, and the reinforcing agent for polypropylene fibers.

[0025] Its preparation method includes the following steps: firstly mix cement, powder and reinforcing agent, then slowly add water reducer, after 3 to 5 minutes, slowly add anti-seepage agent, stir evenly, pour into the collecting hopper, when the drilling rig is moving When the design depth is reached, the mixing head is reversed, and the mixing is lifted while spraying, and the mixing is carried out again.

[0026] After testing: 28-day compressive strength: 5.7MPa...

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Abstract

The present invention provides a coastal soft foundation soil solidifying and reinforcing material, comprising the following components by weight: 5-10 parts of cement, 2-6 parts of a powder, 0.5-1 part of a water reducer, 0.5-1 part of a permeability-reducing agent, and 1-2 parts of an enhancer. The invention also provides application of the above solidifying and reinforcing material to the preparation of cement stirring piles. Aiming at the special environmental conditions of high water content, large void ratio and strong corrosion of the coastal soft foundation, some materials are added on the basis of existing material for cement stirring pile, so as to improve the corrosion resistance, erosion resistance, water seepage resistance, strength and bearing capacity of cement stirring pile. Furthermore, the invention uses non-toxic and green materials; the fly ash, slag powder, cinder and steel slag powder are recycled wastes. The coastal soft foundation soil solidifying and reinforcing material is in favor of haze control and has good economic and social values.

Description

technical field [0001] The invention relates to a solidification and strengthening material, in particular to a solidification and strengthening material for coastal soft foundation soil, and belongs to the field of geotechnical engineering. Background technique [0002] my country has a long coastline and a vast sea area. With the rapid development of my country's economy, the construction of many basic projects, including marine engineering, will surely increase exponentially. The development of marine resources and the implementation of seaside projects are closely related to the bearing capacity of the foundation. The cement mixing pile made of cement or lime as the curing agent, mixed with high-efficiency water reducing agent and other materials, has been widely used in practical engineering to reinforce the natural foundation, and the formed reinforcement can be used as a vertical bearing composite foundation, foundation The retaining wall or anti-seepage and water-pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B28/06C04B18/08C04B18/12C04B18/14C04B16/06
CPCY02W30/91
Inventor 祝建中凌小佳丁莹何敏霞严雷鸣吉栋梁
Owner HOHAI UNIV
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