Improvement of soft Bangkok clay using vertical drains

Abstract This paper presents case records demonstrating the use of vertical drains on soft Bangkok clay. The documented cases include four sand drains and two prefabricated vertical drains. The observed performances of the vertical drains are evaluated. The effects of soil flow parameters, including smear effects due to the installation of the drains, in particular the prefabricated vertical drains, are also evaluated in the light of the current practice of using vertical drains for ground improvement. It is concluded that the use of vertical drains is a viable ground improvement method for soft Bangkok clay.

[1]  R. D. Holtz,et al.  Preloading with prefabricated vertical strip drains , 1987 .

[2]  D. T. Bergado,et al.  Improvement of soft Bangkok clay using vertical geotextile band drains compared with granular piles , 1990 .

[3]  H R Cedergreen.  SEEPAGE CONTROL IN EARTH DAMS , 1973 .

[4]  G. Pilot,et al.  Chapter 9 – Methods of Improving the Engineering Properties of Soft Clay , 1981 .

[5]  A. Skempton,et al.  A Contribution to the settlement analysis of foundations on clay , 1957 .

[6]  K. Terzaghi.  Theoretical Soil Mechanics , 1943 .

[7]  S Hansbo.  CONSOLIDATION OF CLAY BY BANDSHAPED PREFABRICATED DRAINS , 1979 .

[8]  Choa,et al.  DRAIN PERFORMANCE IN CHANGI MARINE CLAY , 1981 .

[9]  Calhoun,et al.  Development of Design Criteria and Acceptance Specifications for Plastic Filter Cloths , 1972 .

[10]  H. G. Poulos.  Stresses and Displacements in an Elastic Layer Underlain by a Rough Rigid Base , 1967 .

[11]  Dennes T. Bergado,et al.  Closure of "Smear Effects of Vertical Drains on Soft Bangkok Clay" , 1991 .

[12]  Nabor Carrillo,et al.  Simple Two and Three Dimensional Case in the Theory of Consolidation of Soils , 1942 .

[13]  Dennes T. Bergado,et al.  Settlements of Bangna-Bangpakong highway on soft Bangkok clay , 1990 .

[14]  S. Hansbo.  Consolidation of fine-grained soils by prefabricated drains , 1981 .

[15]  S. Hansbo,et al.  Design aspects of vertical drains and lime column installations : Proc Ninth Southeast Asian Geotechnical Conference, Bangkok, 7–11 December 1987 V2, P8.1–8.12. Publ Bangkok: Southeast Asian Geotechnical Society, 1987 , 1990 .

[16]  赤木 俊允.  Effect of displacement type sand drains on strength and compressibility of soft clays , 1977 .

[17]  S. Poulos,et al.  ON THE EFFECTIVENESS OF SAND DRAINS , 1969 .

[18]  Akira Asaoka,et al.  OBSERVATIONAL PROCEDURE OF SETTLEMENT PREDICTION , 1978 .

[19]  Robert V. Whitman,et al.  Permeability of Disturbed Zone Around Vertical Drains , 1991 .

[20]  Dennes T. Bergado,et al.  Inverse analysis of geotechnical parameters on improved soft Bangkok clay , 1992 .

[21]  R. Barron.  Closure of "Consolidation of Fine-Grained Soils by Drain Wells" , 1948 .

[22]  James L. Sherard,et al.  Critical Filters for Impervious Soils , 1989 .