Investigation on the Influence Caused by Shield Tunneling: WSN Monitoring and Numerical Simulation

Table 2

Monitoring scheme of shield construction affected area.

Monitoring object	Monitored parameters	Layout scheme of monitoring points	Measurement points
Adjacent buildings	Tilting	(1) The monitoring range is the buildings within 30 meters from the central line of the tunnel	4
		(2) The building displacement monitoring points are arranged on the external wall or bearing column
		(3) The distance between monitoring points along the external wall should be 10 m ∼ 15 m
		(4) The intelligent terminal is arranged within the visual range of 100 meters of the inclination fulcrum
Shield segment	Clearance convergence	(1) The measuring points in the building area are arranged one for every 8 rings	21
		(2) The measuring points of other sections are arranged one for every 20 rings
		(3) One relay jump fulcrum is set every 90 meters (13 fulcrums in total), and the intelligent terminal is arranged in the tunnel starting shaft