การทำนายพฤติกรรมการทรุดตัวของชั้นดินเหนียวอ่อนกรุงเทพปรับปรุงด้วยแถบระบายน้ำตามแนวดิ่ง
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Abstract
Abstract
This research aims to study the settlement behavior of the soil improved by prefabricated vertical drain (PVD). The settlement analyzed by using Barron method, Inflection point method and finite element method were compared. The construction of runway of Suvarnabhumi Airport is used as case study. The results show that the settlement behaviors that calculated by all methods are according with field settlement. Barron method is the most simple since a few effects are taken to account. The Inflection point method is the most suitable for settlement analysis, but it is more difficult to calculate. By finite element method, the settlement occurs faster than the field settlement. The disadvantage of this method is the need of complex parameters of soil, but the advantage are the behavior of settlement at any point in soft clay and behavior of excess pore water pressure can be studied.
Keywords: prefabricated vertical drain; settlement; inflection point method; Barron method; finite element method
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References
[2] Shin, D.H., Lee, C., Lee, J.S. and Lee, W., 2009, Detection of smear zone using microcone and electrical resistance probe, Can. Geotech. J. 46: 719-726.
[3] Saowapakpiboon, J., Bergado, D.T., Voottipruex, P., Lam, L.G. and Nakakuma, K., 2011, PVD improvement cobined with surcharge and vacuum preloading including simulations, Geotext. Geomemb. 29: 74-82.
[4] Barron, R.A, 1948, Consolidation of fine-grained soils by drain wells, Transact. ASCE 113: 718-754.
[5] Leo, C.J., 2004, Equal consolidation by vertical drains, Geotech. Geoenviron. Eng. 130: 316-326.
[6] Walker, R. and Indaratana, B., 2006, Vertical
drain consolidation with parabolic distribution of permeability in smear zone, Geotech. Geoenviron. Eng. 130: 316-326.
[7] Sinha, A.K., Havanagi, G. and Mathur, S, 2007, Inflection point method for predicting settlement of PVD improved soft clay under embankments, Geotext. Geomemb. 25: 336-345.
[8] Bergado, D.T., Alfaro, M.C. and Balasubra-maniam, A.S., 1993, Improvement of soft Bangkok clay using vertical drains, Geotext. Geomemb. 12: 615-663.
[9] Hansbo, S., 1979, Consolidation of clay by band-shaped prefabficated drains, Ground Eng. 12(5): 16-25.
[10] Kunnarong, K., 2015, Settlement analysis of soft clay with and without improved by prefabricated vertical drain, M.Eng. Thesis, Thammasat University, Pathum Thani, 126 p.
[11] Pochai, J., 2003, Consolidation behaviors of soft Bangkok clay improved by PVD, M.Eng. Thesis, Kasetsart University, Bangkok, 268 p.
[12] Kannarong, K. and Chimoye W., 2015, Settlement of soft clay by inflection point method for with and without PVD, Ladkrabang Eng. J. 32(3): 67-72.