Test method for pile-soil load sharing ratio of pile group foundation

The invention discloses a test method for a pile-soil load sharing ratio of a pile group foundation. According to the method, a displacement lifting device and inter-pile soil pressure boxes are adopted; the displacement lifting device comprises a lifting actuator, a displacement sensor, an axial force meter, an inner sleeve, an outer sleeve, an upper flange and a lower flange, and the displacement sensor and the axial force meter are connected with an external displacement monitor and an axial force monitor respectively; the average stress F0 of a pile top is measured by the axial force monitor, and the area S0 of the pile top is calculated; the inter-pile soil pressure boxes are buried at the bottom of a bearing platform and connected with an external pressure monitor, the average stressF1 of inter-pile soil is measured by the pressure monitor, and the area S1 of the inter-pile soil is calculated; the pile-soil load sharing ratio of the bearing platform under different settlement amounts is K, wherein K=(F0