BEHAVIOR OF SHIELD TUNNEL LINING DUE TO CONSTRUCTION LOAD AND ITS SIMULATION TECHNIQUE

Abstract

 The effect of construction load due to shield tunnel excavation is not necessarily temporary rather it continues as a residual effect. The construction loads include the load at the time of assembling the segment associated with the deformation of the previous segment, the load during insertion of the key segment, the load due to the scraping and thrusting between shield tail and segments during tail passing, and so on.
 In this paper, by quantitative evaluation of the monitoring data starting from assembling the segment to the tail passing, it is obsered that there is a significant influence of the above mentioned construction loads in shield tunneling. Based on the evaluation of the monitoring data a simulation model has been proposed considering the construction loads, and the validity and applicability of the model is verified.