Multifunctional soil state monitoring device

The invention provides a multifunctional soil state monitoring device which comprises a shell, a grating fiber strain gauge and a settlement monitoring assembly, a plurality of air chambers are sequentially formed in the shell in the vertical direction, each air chamber is provided with an installation opening in the first horizontal direction, and an avoiding space is formed in the side, away from the air chamber, of each installation opening; two side surfaces distributed along the second horizontal direction on the shell form side compression surfaces; the grating fiber strain gauge is arranged in the mounting opening; a suspension installation space is formed above at least one air chamber, the settlement monitoring assembly is provided with a settlement plate and a pressure transmission structure, the settlement plate is arranged above the shell, the pressure transmission structure is connected with the settlement plate, and a pressure end located in the suspension installation space is formed. The botto