Effectiveness study of prefabricated vertical drain using vacuum preloading and surcharge preloading

2nd International Conference on Eco Engineering Development 2018

生态环境科学

Suhendra, Andryan^1 ; Juliastuti^1 ; Putra, Renaldo Perdana^1 ; Absari, Ferdion^1

Civil Engineering Department, Faculty of Engineering, Bina Nusantara University, Jakarta

11480, Indonesia^1

关键词: Coefficient of consolidation;    Consolidation settlement;    Effectiveness;    Prefabricated vertical drains;    Preloading;    Surcharge preloading;    Vacuum preloading;    Vacuum preloading method;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/195/1/012004/pdf
DOI  :  10.1088/1755-1315/195/1/012004

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Prefabricated vertical drain is a method of soil improvement in order to accelerate consolidation settlement. In line with the development of knowledge, vacuum preloading was used to replace embankment preloading to produce stress in soil. This research will compare the effectiveness of vacuum preloading against the embankment preloading through the analysis of the degree and time of consolidation. The prediction of settlement is manually calculated using 1 dimension consolidation Terzaghi's theory method, while the finite element method by PLAXIS 2D Program and ASAOKA method from settlement on the field. The horizontal coefficient of consolidation used is based on the result of back calculation using ASAOKA's chart. The ratio of coefficient consolidation (Ch/Cv) obtained for vacuum preloading is 5.9 and for embankment preloading is 2.21-4.25. The analysis show that the vacuum preloading method can cut the consolidation time up to 74% comparing the embankment preloading method.