Engineering properties of locally available clayey to silty sands and their applicability as sand compaction pile material | |
| Author | Bersabe, Noel D. |
| Call Number | AIT Thesis no.GT-91-20 |
| Subject(s) | Piling (Civil engineering)--Thailand Piling (Civil engineering)--Asia, Southeastern Clay soils--Thailand |
| Note | A thesis submitted in partial fulfillment of the requirements for the Degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. GT-91-20 |
| Abstract | In Southeast Asia, particularly Thailand, geotechnical problems arise due to the presence of thick deposits of soft clay, the well-known Bangkok Clay. Ground improvement techniques have been the concern of engineers as alternatives to the conventional precast reinforced concrete pile foundations. In this study, the method of Sand Compaction Pile (SCP) is considered. It is aimed that SCP can be employed here in large scale projects. The main concern of this study is to identify sources of cheaper and locally-available types of sand materials (more than 18% passing# 200 sieve) with desirable engineering properties as alternatives of clean expensive sand for SCP construction. Identification of sources and suitability of these materials are necessary so that SCP will be competitive. Areas within 100 km. from Bangkok were explored. Twelve different clayey to silty sand materials were obtained from Ayutthaya, Chonburi and Kampengsen areas including one laterite from Ratchaburi. Physical and engineering properties were determined in the laboratory. Direct shear tests and triaxial compression tests (CID) were performed to determine the stress-strain behavior and the strength parameters (c',ยข' values) at different relative densities (60%, 70% & 90%) and confining stresses (Stsm, 10tsm & 15tsm). Kampengsen material (KPS3) showed values of friction angle at peak stress (CID Test) of 35-40 degrees at various relative densities (60%, 70% & 90%). Drainage characteristics of the samples were also determined by conducting constant-head permeability tests. Permeabilities (centimeters/second) of 16.50x104 , 8x104 and 2.50x104 at 60%, 70% and 90% relative densities, respectively, were displayed by the Kampengsen (KPS3) material. Results indicated that sand materials from Kampengsen area (KPS1, KPS1C & KPS3) are suitable as SCP construction materials. Their particle sizes range from 0.01mm to 6mm. Other sand materials from Ayutthaya and Chonburi including laterite (LAT) from Ratchaburi displayed quite satisfactory properties if fine contents are removed by washing or by mixing with clean sand. |
| Year | 1991 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GT-91-20 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Geotechnical and Transportation Engineering (GT) |
| Chairperson(s) | Bergado, Dennes T.; |
| Examination Committee(s) | Balasubramaniam, A. S.;Honjo, Yusuke; |
| Scholarship Donor(s) | Government of Australia.; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology |