Device beneficial to subgrade settlement measurement in construction period

The utility model discloses a device favorable for subgrade construction period settlement measurement, which comprises a positioning plate, a plurality of extension rods, a protective cylinder and abase, threaded through holes are formed in the corner positions in the base, studs are inserted in the threaded through holes, a plurality of extension rods are sequentially arranged right above the base, and the extension rods are connected with the threaded through holes. Fastening bolts are horizontally inserted into the left side wall and the right side wall of the top of the protection cylinder, a positioning plate is horizontally arranged over the extension rod, gradienters are installed at the top end of the positioning plate at equal intervals, and plug pins are fixed to the center ofthe bottom end of the positioning plate and the center of the bottom end of the extension rod. And pin holes are formed in the centers of the top ends of the extension rod and the base. According to the device beneficial to su