Model Test on the Synchronous Technology Combining with Shield Tunneling and Segment Assembling Based on the Linear Distribution Principle of the Thrust Force

Abstract

Herein, we propose synchronous technology combing shield tunneling and segment assembly based on the active closed-loop control of shield propulsion systems to solve the problem of the too-long construction periods for long-distance shield tunnel projects associated with conventional shield methods. Analytical methods for the distribution of the total thrust force and the redistribution of the missing jacking force were established to stabilize the total thrust force vector in synchronous operations. Then, a super-large model test platform for the shield synchronous technology was developed. The obtained test results verified the feasibility of the analytical methods. The importance of the full-cylinder propulsion mode and the sufficient security of the segments were also confirmed.