Rock slope engineering along Navigation Lock of Xayaburi Hydroelectric Power Project, Lao PDR | |
| Author | Wariyanan Hanka |
| Call Number | AIT Thesis no.GE-16-02 |
| Subject(s) | Engineering geology. Engineering geology--Lao. Soil mechanics |
| Note | A thesis submitted in partial fulfillment of the requirements for the d egree of Master of Science in Geotechnical and Earth Resources Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. GE-16-02 |
| Abstract | Rock slope engineering aspects in the design and construction of a high cut slope for construction of the Navigation L ock of the Xayaburi Hydroelectric Power Project over the Mekong River in Lao PDR are reviewed and assessed in this study. The geology of this dam is quite complex due to tectonic activities in the past. The rock mass is composed mainly of highly fractured and folded phyllite . The structural geologic condition and geotechnical properties of the rock mass are difficult to predict prior to the construction. The actual condition could only be known after the slope excavation was well in progress. Despite the presence of a couple minor faults, the foliations of the phyllite were rather undulated due to folding. Thus, there was no long through going weak plane in the rock mass that was needed for a deep shear sliding failure of the rock mass. Only local plane and wedge slides occur red in some of the benches during excavation. In addition, as the means of cut slope face stabilization was sho tcrete cover doweled by rock anchors, cracks and slippage of shotcrete cover occurred in a number of places due to the high cut height of the hig hly fractured rock and the long continuity of the shotcrete slab. Lateral strain from stress relief of this high cut slope is the main reason of the cracking; however, the cracking did not jeopardize the sta bility of the slope. Only at some places where dr ainage of seeping water between the shotcrete layer and rock face from rainfall and surface runoff was insufficient, shallow slip of the shotcrete face occurred. |
| Year | 2017 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GE-16-02 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Geotechnical Engineering (GE) |
| Chairperson(s) | Noppadol Phien - wej; |
| Examination Committee(s) | Pham Huy Giao;Suttisak Soralump; |
| Scholarship Donor(s) | Ministry of Agriculture and Cooperative (MOAC);Thailand; Asian Institute of Technology Fellowship; |
| Degree | Thesis (M. Sc.) - Asian Institute of Technology, 2017 |