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List of products by author: S. W. Choi
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Development of an SFRC segment within a TBM tunnel: flexural beam test for evaluation of SFRC
Abstract: A Korean research project examining the development of full steel fiber reinforced concrete (SFRC) tunnel segments was launched during 2011 and is ongoing. The latest part of this project focused on member-scale evaluation of SFRC and here we present the results of laboratory tests undertaken during 2013. These tests used 16 beam specimens cast with SFRC, and the flexural performance of these...
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Full-scale loading test of a Hybrid SFRC segment lining
Abstract: The use of Steel Fibre Reinforced Concrete (SFRC) in a segment lining has continuously been growing due to its higher bearing capacity and cost-effectiveness than a conventional rebar-reinforced concrete segment (Angelo et al., 2011). However, its definite design rule or specification has not been proposed yet, and it prohibits SFRC segment from becoming more popular in shield tunnels....
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Measurement of Cutter Forces Acting on a Double Disc Cutter in a Full–scale Linear Rock Cutting Test
Abstract: Linear cutting test shows the high reliability of test results in the measurement of cutter acting force because this test use a full-size disc cutter and practical test conditions. That is the reason why many researchers performed the linear cutting test for the design and performance evaluation of tunnel boring machines (Bilgin et al., 1999; Chang et al., 2011; Rostami and Ozdemir, 1993;...
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Measurement of cutter forces acting on disc cutters with different ring shapes during linear cutting tests
Abstract: Predicting the cutter forces that act on disc cutters is essential for the design and performance evaluation of tunnel boring machines. Here, we present the results of an experimental evaluation of the differences in cutter forces and stresses with changes in the ring shape of a disc cutter. Cutter-normal and rolling forces, and cutter-normal stresses increase in proportion to the contact area...
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