Centrifuge model tests were conducted to clarify the mechanism of redisutribution of earth pressure around ECL tunnel. The tunnel was modeled by rubber balloon filled up by deaired water so that the steel fiber reinforced concrete used for ECL could be regarded as liquid before hardening. And some cases of ECL tunnels were analyzed with the redistribution. Following conclusions may be drawn by these studies. (1) the earth pressures around the ECL tunnel were influenced by fresh concrete pressure intensely. (2) redistributed earth pressures were defined by concrete density, depth and pressure at the crown. (3) analysis results were nealy equal to the in-situ measurement at Kohnan Common Duct Work in Okayama.