The invention relates to a measurement method for self-balance static load of pile body comprised an upper pile segment and a lower pile segment. Wherein, connecting a load tank contained an oil cylinder and piston groupware between the two pile segments; fixing a displacement rod with a sleeve outside on top of upper segment, both the displacement rod and sleeve lead out the ground; the sum of loading displace value of rod and pile top moving up value of upper segment is the displace value of pile top when forcing static load; or, arranging displacement sensor with testing line and protective sleeve between upper and lower steel boards and fixed on bottom of upper board; arranging testing line tube to lead out to ground; all the sensor, sleeve and testing line tube between upper and lower steel boards, arranging an vertical-block type extendable part; the real measured displace value minus the moving up value of pile top is the displace value of pile top when forcing static load. This invention can reduce the cost more than 30%, and has wide application. |