@inproceedings{oai:kansai-u.repo.nii.ac.jp:00011210,
 author = {Ise, Kentaro and Kusumi, Harushige and 楠見, 晴重},
 book = {Proceeding of EIT-JSCE Joint International Symposium 2009},
 month = {Sep},
 note = {The collapse accident of shallow tunnel occurred under construction in Japan, and landslides of the volume of about 6,700 m3 flowed into the tunnel. Geology of the collapse location is composed of 5 layers, and the upper side of the tunnel is used as field of rice. It is supposed that factors of this collapse accident were low earth covering, distribution of sandy soil layer and cohesive soil layer that are low-stiffness, and so on. However, its details are not clarified. In this paper, we try to clarify the mechanism of this collapse in modeling of ground composed of 5 layers using two dimensional DEM. In this analysis method, value of physical properties of simulation object is controlled by interparticle parameters. Then, in advance of simulation of excavation, we tried the simulation analysis of biaxial compression test by DEM, and examined the parameters that are expressible of the simulation object. Using this analytical condition, we tried to simulate excavation of the shallow tunnel, and to examine the differences of ground behavior by geological structures. As the result of this analysis, it is recognized that subsidence of ground surface is inhibited by improving the layers of low-stiffness.},
 title = {Simulation analysis of excavation of shallow tunnel in multilayered ground by DEM},
 year = {2009}
}