Tunnel peripheral displacement measuring system and measuring method

The invention discloses a tunnel peripheral displacement measuring system and method. The measuring system is composed of a liquid level static pressure measuring device and a wire resistance measuring device. The liquid level static pressure measuring device comprises a liquid pipe, a liquid storage tank and a plurality of micro-pressure sensors, and the micro-pressure sensors are connected in series to the positions, corresponding to tunnel measuring points, of the liquid pipe; the wire resistance measuring device comprises a sliding support and resistance wires, the sliding support comprises a base and hanging rings fixed on the base, the base is fixed on each measuring point, and after the resistance wires penetrate through all the hanging rings one by one, the two ends of each resistance wire are in a constant tension state; and leads and resistance wires of all the micro-pressure sensors are connected to a serial bus and are merged into a tunnel monitoring looped network to enter a measurement and contr