Mendeley出力
＜会議発表論文＞
Development of Chain Conveyor Cutter Method and Its Application
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| 概要 | Currently, ocean disposal sites can provide more space for landfill than other areas such as waste landfill in the mountains and in the coastal areas. The construction of disposal sites in the ocean, ...therefore, has received attention in Japan, which has limited space for landfill. In the case of ocean disposal sites, the leakage of pollutants from waste materials has to be prevented by constructing a vertical impermeable wall around the disposal site. In the field of ground improvement works, mechanical soil mixing is an indispensable technique and is carried out using an auger type machine with mixing paddles attached to the drilling rods. This type of machine excavates the soil in situ horizontally and cannot mix the cut soil vertically. In this system, the strength of the constructed soil cement column is governed by the weakest strata and the impermeability of the constructed soil cement wall is not necessarily uniform. From this point of view, the Chain Conveyor Cutter (CCC) method has been developed as the technology for soft-ground stabilization in Japan. The ground is excavated with the construction of an improved wall by injecting a fixation agent in the method. It is expected that this method will be utilized for the construction of an impermeable wall in ocean disposal sites due to low cost and the simplicity of the construction process. This paper presents a comparison of the performance of a vertical impermeable wall constructed using the CCC method and another using the conventional method through the simulation of the spread of contaminants from the waste storage area with two-dimensional advection-dispersion program, Dtransu-2D, with the aim of the application of the CCC method to the construction of ocean disposal sites. The results indicated that the CCC method can be applied to the construction of ocean disposal sites, enabling the construction of an impermeable wall in a simple way and at lower cost when compared with walls that were constructed using the conventional method. Additionally, the distance between the impermeable wall and the waste storage area in ocean disposal sites should be larger in order to minimize the effect of water flow near the impermeable wall on the spread of pollutants from the waste storage area.続きを見る |
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| 登録日 | 2021.02.08 |
| 更新日 | 2021.03.25 |