Seismic Pore Water Pressure Relief Wells forGravel Column–Bed System

Journal of Engineering and Technological Sciences

Franciscus Xaverius Toha¹ 

[1] Faculty of Civil and Environmental Engineering, Institut Teknologi BandungCIBE Building, 5th Floor, Room 0511, Jalan Ganesha 10, Bandung 40132

关键词: gravel bed;    gravel columns;    liquefaction;    pore pressure dissipation;    pore pressure generation;    relief wells;    residual pore pressure;    stone column.;   

DOI  :  10.5614/j.eng.technol.sci.2017.49.1.4

学科分类：工程和技术（综合）

来源: Institute for Research and Community Services ITB

【 摘 要 】

Liquefaction mitigation can be achieved by dissipating seismic pore pressures. The research reported in this paper elaborates the effectiveness in dissipating seismic pore pressures of a gravel bed and relief well system using gravel columns in a case study in Cilacap, Indonesia. Seismic pore pressure generation was analyzed using commonly available methods in liquefaction analysis. The evaluated pore pressures in the sand layer and gravel columns were used in a 2D dissipation analysis using finite-difference consolidation equation solutions. The results of this study showed that a simple and cost-effective relief well and gravel bed or strip system can effectively dissipate excess pore pressures in the sand layer and gravel columns to a maximum residual pore pressure below 40%, thus reducing liquefaction potential as well as protecting the foundations in the sand.

【 授权许可】

CC BY