Sandstains are used when the soil is saturated with water, such as clay, saturated sand, peat with a very low surface thickness (less than 3m). That is the process of treating the ground to be applied, applied when our land belongs to the case as above.
The effect of mattress sand
Sandy Night is a kind of foundation treatment that is made from a thick layer of sand in the foundation of the water to be treated. They offer the following effects:
- Accelerates the consolidation speed of the platform, thereby increasing the load capacity of the floor and reducing the resolution process.
- Reduce the depth of the buried nails, thereby reducing the amount of construction material needed for the foundation.
- Reduced foundation settlement; Ground subsidence due to stress distribution by external load causes inside of soil under the sand layer.
- The sand layer acts as a load bearing layer, absorbing the load of the works into the natural soil layer, increasing the load capacity of the soil.
- However, in sand-cushioning, attention should be paid to the flow of sand, soil erosion by groundwater or liquefaction due to dynamic loads.
Should not use sand mattress
The size of the mattress is determined by calculating to meet two conditions: stability and durability of the building after the mattress is within the limits. The water table is high and pressure is high. At this point, it would be very costly to lower the water level and the cushion would be unstable and expensive. The substrate must be replaced with a thickness of over 3m, then the thick mattress will be thick and difficult to apply again without economic benefits.
Select unit for foundation treatment sand cushion
Weak soil and weak soil sand remediation is one of the most common construction works. So far in our country, the construction of this structure on weak land is not easy for the builder, poses many complex issues that need to be seriously studied, ensure stability and allow for solving. construction.
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