Grouting reinforcement is a common method Foundation treatmentReinforcement method, can is the solidification of slurry, cement or other chemical grout) injection of rock and soil foundation cracks or pore, out of the water and gas, the connection between soil particles, after hardening and intensity of rock and soil can be consolidated into one big, the waterproof performance is good, good chemical stability of the whole, to reinforce the foundation, prevent or reduce the permeability and the purpose of uneven settlement.

According to the grouting mechanism, the grouting reinforcement can be divided into filling grouting, bedrock crack grouting, interface grouting, concrete crack grouting, penetration grouting, split grouting and compaction grouting:

1, filling grouting

It IS USED for backfilling grouting of holes under the foundation of tunnels, structures and the pores in the soil to strengthen the whole soil layer and improve the stability of the soil.

2And grouting of bedrock fissure

Grouting is carried out in the fissure of the bedrock to improve the strength of the stratum or to achieve the effect of water stop, which is mostly used in the seepage prevention and reinforcement of rock foundation and the opening of tunnels and shafts.

3, interface grouting

Grouting is carried out to the layered soil foundation or structural interface to form sheet consolidation body, so as to improve the mechanical properties of the layer or interface.

4, concrete crack grouting

Through grouting, the concrete by temperature, the load, the foundation of the uneven settlement and construction quality and other factors of the impact of the cracks and defects of reinforcement and seepage treatment, in order to restore the integrity of the structure.

5, infiltration grouting

The slurry penetrates into the soil, pushes out the free water and gas in the soil, fills the cracks or voids, cements the surrounding soil, and forms a compact solidified body, thus improving the compressive strength and impermeability of the soil layer. Infiltration grouting will not cause the structure change of undisturbed soil basically.

6, split grouting

Under high grouting pressure, the grout is injected into the formation with small porosity, resulting in splitting flow along the structural plane of the formation, forming veins and network distribution in the formation. The composite foundation composed of irregular vein-like consolidation, soil compacted due to slurry pressure, and soil unaffected by grouting can have a certain bearing capacity, and the degree of improvement varies with the distribution of veins.

7, compaction grouting

When high plastic grout is used and the foundation is soft soil with fine particles, grout with a certain consistency or quick-setting type is used to pour into the soil through drilling holes to form "slurry bubble" near the grouting pipe section, so that the soil near the grouting point is compacted and the physical and mechanical properties of the soil are improved.

In the building Foundation treatmentIn, the grouting reinforcement method mainly adopts the reinforcement body formed by cement mixing grouting and high-pressure rotary jet grouting as the composite foundation to improve the bearing capacity of the foundation.

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