Basic requirements of steel structure foundation?
 

Now a lot of steel structure in use, the need to pay attention to the material and some of the details of the construction details.
 

General requirements for building foundation steel structure building, based on the same structure unit, not part of the natural foundation, the artificial foundation, also should take more and more than two types of soil nature difference, as the bearing stratum, when the slope of the steel structure construction of high-rise building foundation pile bottom plate or close to or into the local the top surface of stratum, should deepen the basis or increase the pile length, the pile foundation bottom or all in the same look inside the bedroom, to avoid the possibility of production of uneven settlement. With lots of edge of steel structure construction site can not avoid the earthquake may have a slip or its river, lake, the river, should be adopted for foundation stability measures, and strengthen the foundation of the whole hugh. In the range of the foundation bearing layer of high-rise buildings in seismic area, when there are liquefiable soil layers, measures should be taken to eliminate the adverse effects of the soil liquefaction on the superstructure.
 

Eliminate all adverse effects on the foundation soil liquefaction settlement of steel structure building, according to a local bar selection of the following measures: 1: use of encryption method, such as sand pile, vibro compaction method, dynamic compaction method, reinforce the foundation, should be under the interface to the soil liquefaction depth, and after processing, standard penetration depth the hammering number measured should be greater than the critical value of soil liquefaction. When the deep foundation is used, the depth of the soil layer below the depth of the bottom of the foundation shall not be less than 500mm. 3: steel structure building with pile foundation, pile end into the depth of liquefaction stable below the soil in length, according to the bearing capacity of the pile is calculated, and shall not be less than the following numerical, excavated buildings foundation bearing layer within the scope of all liquefaction.