各種基礎 (2)

[VI-591] Example of steel pipe sheet pile foundation in the ground with hard middle strata.

*板橋 美保¹、野巻 雅紀²、駒澤 辰弥¹、原田 大樹¹ (1. NB工法協会、2. ユーディケー)

Keywords:steel pipe sheet pile foundation, hard middle strata, vibratory pile driver, NB System

In the construction of a steel pipe sheet pile foundation with hard middle strata, it was issue to secure the process observance and the construction accuracy.In the conventional middle digging method, at the time of punching the hard middle strata, it is feared that securing of construction accuracy becomes difficult and the injection will be difficult and a process delay will occur.Therefore, the authors decided to use a low vibrator attached to the steel pipe sheet pile head as needed.And we achieved process observance and securing of construction accuracy.

In this paper, we report this construction outline and the results.