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Method for prevention and emergency treatment of soil geological hazards

An emergency treatment and soil technology, applied in the direction of soil protection, chemical instruments and methods, soil conditioning materials, etc., can solve the problems of building tilt, soil bearing capacity decline, long construction period, etc., to achieve small size, eliminate water Expansibility, effect of improving load carrying capacity and volume stability

Active Publication Date: 2012-06-13
方文盛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of adding soil reinforcement is that it costs a lot, the construction period is long, it is not suitable for emergency situations, and the construction safety cannot be guaranteed.
Similarly, methods such as grouting when repairing the foundation are relatively expensive
[0006] When the foundation of a house building is built on expansive soil / soft soil, if the groundwater level changes, the soil bearing capacity will decrease, or the natural environmental conditions will cause the formation of highly expansive ettringite in the soil, which may cause the foundation to move and tilt. In turn, it will cause the buildings to tilt, damage the walls of the buildings, and in severe cases, make the houses unusable.

Method used

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  • Method for prevention and emergency treatment of soil geological hazards
  • Method for prevention and emergency treatment of soil geological hazards
  • Method for prevention and emergency treatment of soil geological hazards

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] In the process of road construction, a section of soft soil needs to be mixed, plasticized and strengthened. After testing, the plasticity index of soil is 18, and the content of silt and clay is 20%, and sulfate content is 0.1%, can handle with one of following several methods of the present invention:

[0043] 1. Mix sodium fluoride directly with the soil, and the dosage of sodium fluoride is 0.5% of the soil weight. After mixing with water, carry out layer-by-layer compaction, and the thickness of each layer can reach 15 cm. After 12 hours, the next step of construction can be carried out.

[0044] 2. Mixed use of fluorine-containing compounds and lime. Among fluorides, the mass ratio of sodium fluoride to calcium fluoride is: sodium fluoride: calcium fluoride = 4:1, and the amount of lime is 5% of the weight of the soil. The dosage of fluorine compound additive is 0.5% of soil weight. After mixing with water, carry out layer-by-layer compaction, and the thickness...

Embodiment 2

[0047] During the construction of the earth dam, a section of soft soil needs to be mixed to reduce plastic and strengthen. After testing, the plastic index of the soil is 18, while the content of silt and clay is 29%, and the sulfate content is 0.08%, which can be processed with one of the following methods of the present invention:

[0048] 1. Mix sodium fluoride directly with the soil, and the dosage is 0.7% of the soil weight. After mixing with water, it is compacted in layers, and the thickness of each layer can reach 15 to 45 cm. After 12 hours, the next step of construction can be carried out.

[0049] 2. Sodium fluoride and lime are mixed, the consumption of lime is 6% of the weight of the soil, and the consumption of sodium fluoride is 0.6% of the weight of the soil. After mixing with water, it is compacted in layers, and the thickness of each layer can reach 15 to 45 cm. After 24 hours, the next step of construction can be carried out.

[0050] 3. Potassium fluor...

Embodiment 3

[0052] In the process of repairing the foundation of the house, a section of expansive soil under the foundation needs to be stabilized and strengthened. After testing, the plasticity index of soil is 25, and the content of silt and clay is 20%, and sulfate content is 0.06%, can handle with one of following method of the present invention:

[0053] 1. Drill a single hole or multiple holes, inject saturated sodium fluoride solution directly into the expansive soil in stages, and the total amount of fluoride is 1% of the estimated weight of the expansive soil. After each injection of fluorine-containing compound (0.3%), the hole is sealed, and the degree of downward settlement of the house is observed. Every two weeks until settlement stabilizes or 1.0% is used.

[0054] 2. Drill a single hole or a multi-hole, inject sodium fluoride additive and lime saturated solution directly into the expansive soil in stages, the sodium fluoride is 1% of the weight of the expansive soil, and...

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Abstract

The invention relates to a method for prevention and emergency treatment of soil geological hazards, which belongs to the technical field of geological hazard treatment. Firstly, fluorinating agents, lime, cement and coal ash are added in soil, each component is mixed with the soil according to proportion, or each component is dissolved in water, and water solution is poured in the soil according to proportion, or each component is injected in damaged soil bodies in solution or suspension modes, and then reaction time is 10 hours to 24 hours. The method can be widely used in emergency treatment, preventive treatment and permanent repair treatment of soil of soil body mountain slopes, roadbeds and foundations, river levees, dams, channels and ponds, can be used for emergency strengthening and stabilizing earth dike mountain slopes and the dams at a collapse edge, repairing highways, railways and airports and soil foundations of building structures, and can prevent and treat / repair damage of ettringite and similar mineral substances generated by changes of environmental factors in the soil foundations on base installation in emergency or permanently.

Description

technical field [0001] The invention relates to a method for preventing and emergency treating soil geological hazards, belonging to the technical field of geological hazards treatment. Background technique [0002] Expansive soil and soft soil are widely distributed in more than 40 countries in the world. Expansive soil and soft soil exist in every province, city, and autonomous region in my country. In our country, the building area caused by damage to the expansive soil foundation reaches more than 10 million square meters every year, and the degree of damage to highways and railways is particularly serious. Due to the destructive effect of expansive soil on the natural environment, society and infrastructure (such as landslides, mud flows, cracking, uplift or subsidence of the road surface, the displacement and fracture of the foundation of the building due to the seasonal expansion and contraction of the expansive soil, which in turn causes the building Cracks on the w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/12C09K17/10C09K103/00
Inventor 邓云杜联祥
Owner 方文盛
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