Interior works are installed in highway tunnels for the purpose of ensuring the visual environment of passing vehicles, guiding the line of sight, and improving the lighting effect. Conventionally, the tile directing method, the panel floating method, and the painting have been applied to this interior work. Looking at the interior sheets that have been installed so far, there are some deformations such as peeling of tiles, damage to panels, and corrosion of fixing brackets. Therefore, the authors considered the application of an interior sheet worker using an adhesive sheet as an alternative to the interior worker who mainly uses tiles and panels. In this paper, when applying the adhesive sheet, the adhesiveness, which is one of the basic performances of the adhesive sheet, is peeled off and the adhesive force is grasped.

 In the construction of underground opening by the mountain tunnel method, the stability of tunnel face cannot be ensured depending on rock mass conditions, and a collapse phenomenon may occur. For this reason, many studies have been carried out about the stability of tunnel face. However, most of previous studies have been performed without considering the spatial heterogeneity of geomechanical properties. In this study, in order to collect effects of spatial heterogeneity of geomechanical properties on the stability of tunnel face, basic stability analyses of tunnel face considering the spatial heterogeneity of geomechanical properties in soft rock mass were carried out based on the random field theory. It was clear that the effect on displacement and maximum shear strain on tunnel face was large depending on heterogeneous condition in rock mass, and it was necessary to properly evaluate the effect.

 We have developed and standardized the new bearing support of laminated steel plates as an alternative to the morning glory shaped bearing support of cast steel which have been widely used for steel columns to build underground spaces in subway stations for a long term. The new bearing support is constructed by laminated round steel plates which have different diameters corresponding to the thickness of steel plate to reproduce sectional shape of the morning glory shaped bearing support. This paper shows the table of standardized dimensions of the bearing support of laminated steel plates for each design type calculated by design formula and the results of full-scale tests using typical design type of column and FEM analysis conducted to confirm the validity of design formula. This paper also shows the possibility of further rationalization by the application of new calculation method for supporting reaction force based on effective diameter corresponding to the height of bearing support.

 This study aims to explain the behavioral characteristics of people encountering a fire in an underground shopping mall using a VR system that enables them to control their avatars with physical movements. In Experiment 1, the distance to the exit light was changed so that the visibility of the exit light in the VR space smoke would be the same as that in the real space. The participants adjusted the density of the smoke so that the exit light could be seen. In Experiment 2, based on the results of Experiment 1, the behavior of the research participants was measured at the underground mall where the fire occurred in the VR space. The results indicated that most of the participants evacuated from the nearest exit, however, some of them evacuated from the farther exit. This may be due to individual differences in the way the participants used the evacuation exit guide lights and in the formation of the cognitive map that is the basis of the Survey Map, which is used when people encounter unexpected situations in their spatial behavior.

 The rainfall events cause flash floods and drowning accident occurs in an underground area. Therefore, it is very important to study the falling down risk when people walk through the flood water. In this study, the flume experiments were conducted using the human body model (1/6 scale). We changed the channel width, number of people, direction of body and body posture. The drag force exerted on the human body was measured in a narrow channel which assumes the underground pass. The data showed that the drag force acting on the body increases in the narrow pass due to the backwater rise. We revealed that the falling down risk when people walk through the flood water becomes larger than the risk when people walk toward the flood water. The risk of being washed away in the lying position by water flow was also examined.