Determination of the horizontal (radial) coefficient of consolidation by from oedometer test with horizontal drainage using incremental loading method

• Main Author: Lê, Việt Hưng
• Other Authors: Nguyen, Tien Dung
• Format: Theses
• Language: English
• Published: 2020
• Subjects: Phương pháp tải gia tăng phương pháp tải gia tăng Phương pháp tải gia tăng; Cơ sở hạ tầng; Thoát nước; 624.1
• Online Access: http://repository.vnu.edu.vn/handle/VNU_123/70343
• Institution: Vietnam National University, Hanoi

The radial (horizontal) coefficient of consolidation (cr) is a key parameter which impacts the total consolidation of the PVD-improved grounds. In practice, the cr value can be interpreted from field tests and laboratory tests. A radial consolidation test (RCT) might be conducted using incremental loading (IL) method with either a central drain (CD) or a peripheral drain (PD). The key goals of the research are: (1) to design and manufacture a multi-directional flow consolidometer (VCT, RCT-PD, RCT-CD) using incremental loading method; (2) to make a comparative study on the cr values obtained from the RCTIL using a PD and a CD; (3) to make a comparative study on the cr values derived from RCT-based method and CPTu-based method. A desk study is carried out to secure the following: (1) a literature review on equipment used for the test and existing methods used to evaluate the cr value; (2) graphical design of a multi-directional flow consolidation cell. Sampling and CPTu dissipation tests are carried out at sites. Besides the basic physical lab tests, the RCTIL with a CD and a PD will be performed using the designed consolidation cell under same condition test.