地下構造物 (4)

[VI-635] Dismantling case of underground substructure considering high groundwater level

*鶴岡 佑樹¹、柴野 一則¹、大平 祥喜¹、長谷川 光洋¹、諏佐 一紀¹ (1. 東急建設株式会社)

Keywords:incineration plant dismantling, underground substructure dismantling, all-round excavator, all-casing construction method, groundwater level

Incineration plants are often located near rivers, and underground refuse pits are often built deep underground. Therefore, the measures and construction method of groundwater at the time of dismantling the underground enclosure become important factors in terms of construction period and cost. In this construction, the underground water level was high, and the all-casing construction method using an all-round excavator was selected and constructed as a construction method of underground substructure. As a result, in this work, the construction period was about one month, and the cost was reduced by about 20%, compared with the general construction method.