ESTIMATION OF WORKING LOADS APPLYING THE DRYING SHRINKAGE IN THE CONSTRUCTION PROCESS OF OPEN CUT TUNNEL BASED ON A RESULT OF SITE MEASUREMENT

Abstract

 We conducted stress measurement of the reinforcing bar stress transducer which made before structure concrete of cut and cover tunnel placing defaults until the structure construction completion in on a specific site in Fukutoshin line, and presumed the static load of the structure by executing the back analysis about a result which separated thermal stress and the dry shrinkage stress from a measurement stress of reinforcing bar stress transducer. As a result, it was found out that static load of the side wall is lower than the design load and it seemed to be caused by effect of decreasing static load by leaving retaining wall.