What are the basic requirements of light steel prefab

The foundation requirements of light steel structure houses are much lower than those of traditional steel concrete. For the foundation of the same structural unit, part of the natural foundation and part of the artificial foundation should not be used, and it is not recommended to use two or more soil layers with greatly different properties as the foundation support layer. When the base plate or pile end of the light steel prefab house is close to or partially enters the inclined top surface of the lower soil layer, it is recommended to deepen the foundation or increase the length of the pile, so that the bottom of the foundation or the pile end is in the same bottom house to avoid possible H Tr.

Steel construction sites cannot avoid the edge sections of rivers, lakes and channels that can cause slippage or cracks in the ground during an earthquake. Targeted foundation stabilization measures should be taken and the integrity of the foundation strengthened. When there is a liquefied soil layer within the range of the foundation bearing layer under the foundation of a high-rise building in an earthquake zone, measures should be taken to eliminate the adverse effect of the soil layer liquefaction on the superstructure. In order to completely eliminate the adverse effects of foundation liquefaction and settlement on steel structure buildings, one of the following measures can be selected according to local conditions:

1: Vibration impact method, sand pile compaction method, dynamic compaction method and other densification methods are used. When reinforcing the foundation, it should be treated to the interface with lower liquefaction depth and penetrating hammer with the standard treated soil layer. The measured value of the number of hits should be greater than the critical value for soil liquefaction.

2: When using a deep foundation, the depth below the liquid penetration depth at the bottom of the foundation buried in the stable soil layer should not be less than 500mm.

3: When the pile foundation is used for steel structure construction, the length of the pile end extending into the stable soil layer below the liquefaction depth shall be calculated and determined according to the bearing capacity of the pile, and shall not be less than the following value. All liquefiable soil layers within range.

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