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| | Abstract | | Chain Alley Method is the exploration method which can grasp the structure of the underground in detail. The back filling isn't made any dugouts. A road has collapsed at a residential area in western Kanto area. There are no plans of the dugout, so they don't know the distribution of the tunnel. Therefore they couldn't do plan drafting of a measure. We put a chain Alley investigation into effect for the purpose of detection in a dugout in this place.We detected the soil structure which seems a dugout as a result of Chain Alley Method. We confirmed the existence in dugouts as a result of the boring. |
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