Silt soil is a loose and weak fine grained soil with more organic matter, which is deposited in still water or slow water flow environment and formed with the participation of microorganisms.

1. Characteristics of silt soil

- High pore ratio, high water content (greater than liquid limit);

- Low water permeability;

- High compressibility, low shear strength.

2. Origin and distribution of silty soil

Silty soil is usually deposited in still water or slow flowing water environment with the participation of microorganisms. In China's coastal areas, inland plains, mountain basins and piedmont valleys, there are all kinds of silt soils.

(1) The silt deposited along the coast is widely distributed, with large thickness and loose and weak soil.

(2) The silty soils deposited in lake basins in inland and mountain areas are scattered and have small thickness and great changes in nature.

(3) There is a kind of "mountain type" silt deposited in the piedmont valley, which is mainly distributed in Chonggully valley, river terrace and various depressions, and its distribution, thickness and properties vary greatly. It is mainly composed of local marl, shale, mudstone weathering products and surface organic materials, carried by water flow and deposited in the low-lying areas of the original terrain, softened by long-term blisters and the action of microorganisms.

3. The impact of silt geology on foundation subsidence treatment company

- Characteristics: high compressibility, low strength

- Impact: As a foundation, silty soil has low strength, high compressibility, and a soft plastic state, which is prone to deformation, resulting in foundation subsidence treatment company.

- Performance: large and uneven settlement; The sedimentation rate is large; The settling stability lasted for a long time

4, silt geological settlement control methods

Firstly, the soil layer of the foundation is investigated and analyzed, and the scope and depth are determined. During construction, attention should be paid to the protection of soft soil foundation pit and the reduction of disturbance. Its main foundation subsidence treatment company governance methods are as follows:

(1) "light foundation shallow burial" method: When there is a dense soil layer on the surface, make full use of it as the supporting layer of the natural foundation.

(2) Load reduction method: Reduce the pressure of the building on the foundation, such as the use of light structures, light walls, hollow components, underground or semi-underground Spaces.

(3) Laying sand cushion method: on the one hand, it can reduce the additional pressure on the silt soil and reduce the settlement of the building, on the other hand, it is conducive to the removal of water in the silt soil, shorten the consolidation time of the soil layer, and make the building fall quickly to stability.

(4) sand well prepressure reinforcement method: using sand well, sand well prepressure, electroosmotic method to promote soil drainage and consolidation to improve the bearing capacity of the foundation.

(5) Soil replacement cushion method: in case of local soft soil and hidden buried ponds, trenches, valleys, caves, etc., clear its scope, pay attention to local deep burial of soil replacement cushion, combined with short piles, foundation beam crossing and other methods.

(6) Traditional grouting method: According to the actual situation, the construction personnel can adjust the grouting parameters, such as grouting pressure, grouting amount, etc., in order to adapt to the reinforcement needs under different weak foundation conditions, and effectively improve the bearing capacity and stability of the foundation.

(7) Non-destructive and controllable soil solidification technology treatment method: the use of new materials, new technology, deep silt layer and other complex geology, fill, penetrate, squeeze the soil layer, so that the foundation soil layer is fully dense, enhance the stability of the foundation, improve the bearing capacity of the foundation.

Hengxiang Hongye non-destructive and controllable soil solidification technology adopts international patented technology, the use of new special composite materials, the use of small hole minimally invasive technology, lightweight equipment, flexible and efficient operation, suitable for the treatment of silt, silt, clay, silt, sand, gravel soil, artificial fill and other foundations, to achieve rapid and accurate foundation consolidation.

In short, the deformation and strength of silt soil foundation must be paid great attention in the project, especially the large deformation problem leads to the uneven settlement of the foundation and causes a large number of engineering accidents. Therefore, when designing and treating foundation subsidence treatment company in areas with silty soil, it is necessary to comprehensively and comprehensively consider foundation, building, structure, construction and use. To ensure the safety and normal use of buildings, appropriate foundation subsidence treatment company measures should be taken to strengthen the foundation and reduce the uneven settlement of the foundation.

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