Study on the Impact of Hydraulic Fracturing on Surrounding Ancillary Buildings considering SSI

Table 4

The first six order modal periods of the structure with different soil properties with different foundation buried depths.

Mode	Shallow-buried foundation (s)	Deep-buried foundation (s)	Regardless of the SSI effect (s)
1	3.631	3.503	3.225
2	3.013	2.822	2.737
3	2.571	2.419	2.333
4	2.402	2.404	2.171
5	1.833	1.835	1.524
6	1.721	1.721	1.325