Prediction of long-term settlement of the Thai Binh soft clay improved by PVDs and vacuum | |
| Author | Do Xuan Hoang |
| Call Number | AIT RSPR no.PME-GEM-13-06 |
| Subject(s) | Soil consolidation Vertical drains--Vietnam Clay soils--Vietnam |
| Note | A research submitted in partial fulfillment of the requirements for the degree of Master of Engineering (Professional) in Geotechnical and Earth Resources Engineering with specialization in Geotechnical Engineering & Management |
| Publisher | Asian Institute of Technology |
| Series Statement | |
| Abstract | Recently, the ground improvement technique of prefabricated vertical drains (PVDs) and Vacuum method has been become popular in Viet Nam. This technique can accelerate of consolidation to reduce the construction time and surcharge height. In this research, the ground improvement by PVDs and vacuum method has been applied for 4.2ha of Coal yard area of Thai Binh No.1 Thermal power plant project (TB TPP No.1) during five months. The soil investigation, ground improvement and monitoring were conducted. Subsequently, the monitoring data was collected to back analysis (1) the coefficient of horizontal consolidation (c h ) of clay layers based on the multi depth settlement data (2) the reduction factor (k 1 ) of vacuum with depth based on pore water pressure data and (3) prediction of ultimate settlement from surface settlement data by using Asaoka’s method. The back-calculated results were obtained the c h is 3 to 5 m2/year for Thai Binh clays and the k 1 is 0.8 for vacuum reduction with depth. These back-calculated combining with the others collected soil parameters were selected to predict the long term settlement of Thai Binh clay by using two method (1) the excel spreadsheet with modified equal plane strain consolidation (Indraratna et al., 2005) and (2) the PVDVAC program (Giao et al., 2012). The settlement versus time curves obtained from both of methods are in very good comparison with the measured data. From the results presented in this research, the soil parameters for design calculation, the reduction of vacuum with depth and the long-term settlement of Thai Binh clays improved by PVDs and vacuum were obtained. |
| Year | 2014 |
| Corresponding Series Added Entry | |
| Type | Research Study Project Report (RSPR) |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Geotechnical Engineering and Management (Master Engineering (Professional)) (PME - GEM) |
| Chairperson(s) | Pham Huy Giao |
| Examination Committee(s) | Noppadol Phien-wej;Tian Ho, Seah |
| Scholarship Donor(s) | Fecon Foundation Engineering and Underground Construction JSC, Vietnam |
| Degree | Research studies project report (M. Eng.) - Asian Institute of Technology, 2014 |