FIELD PERFORMANCE OF PVD COMBINED WITH REINFORCED EMBANKMENT ON PEATY GROUND

SOILS AND FOUNDATIONS

MORITO TAKAHASHI¹  HIROCHIKA HAYASHI¹  SATOSHI NISHIMOTO¹ 

[1] Civil Engineering Research Institute for Cold Region

关键词: large-scale field test;    peat;    prefabricated vertical drain;    settlement;    stability;    steel grid;    (IGC: C7/K1);   

DOI  :  10.3208/sandf.51.191

学科分类：建筑学

来源: Japanese Geotechnical Society / Jiban Kogakkai

【 摘 要 】

References(23)Cited-By(1)This paper describes the field performance of prefabricated vertical drains (PVD) used in combination with reinforced embankments on peaty ground. A large-scale field test of PVD adopted in combination with an embankment reinforced using galvanized steel grid was conducted on peaty ground in Hokkaido, Japan. Although the site was characterized by extremely soft peaty ground, a stable, high embankment 11.8 m in thickness was successfully constructed through the combination method. A consolidation-accelerating improvement from the PVD and a reinforcement effect from the steel grid were clearly observed, and settlement of the PVD-improved peat layer corresponded roughly with Barron's solution with consideration to well resistance. However, it was necessary to make the coefficient of consolidation nine times as large as that seen in the results of oedometer testing. The surcharge embankment allowed a reduction of the coefficient of secondary consolidation for the overconsolidated peat layer (overconsolidation ratio: approx. 1.13) to approximately 60% that of the normal consolidated layer.

【 授权许可】

Unknown