Japan Society of Civil Engineers 2020 Annual Meeting

Presentation information

第VI部門

施工計画(2)

Chair:Akiyoshi Toda(SHIMIZU)

[VI-1036] Improvement of steel pipe pile installation method under narrow condition

〇Yohei AKIOKA1, Hideki TONOUCHI1, Kodai WAKISAKA1, Yoichi KIYAMA2 (1.Taisei Corporation, 2.Osaka Metro Services)

Keywords:Steel pipe pile installation by inner excavation and cement mortar injection method, Hard cohesive soil, Narrow space

Steel pipe pile installation by inner excavation and cement mortar injection method was adopted as foundation of railway elevated structure. However, it became impossible to continue this method, because hard cohesive soil resist screw of pile driving machine to rotate. Though Several methods are considered to clear this problem, as change the machine larger scale, narrow space condition rejects those to be adopted. We decided to cut the pipes as half-length and carry out the soil from pipe frequency. Cutted pipes are followed by welding on site. It reduced load of screw to rotate the soil, and pile installation has completed.

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