| Author | Anont Bukkanasuta |
| Call Number | AIT Thesis no.GT-85-25 |
| Subject(s) | Soil stabilization
|
| 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 |
| Abstract | In soil improvement, geogrids reinforced soil is a newly developed technique which utilizes the grid structure of reinforcement . The grid structure consists of a number of longitudinal and transverse members which run perpendicular to each other. The interaction characteristic between soil and reinforcement is more complicated than that of ordinary plane reinforcement because of the existing of the transverse members. The interaction between soil and geogrids consists of the adhesion on the surface of reinforcement and the interlocking of soil within the opening of a grid structure. So far, the design procedure for designing of geogrids reinforced earth system is largely empirical. This thesis had investigated the interaction between soil and geogrids by using direct shear tests and laboratory pull-out tests. The direct shear tests were conducted in order to understand the adhesion characteristic while the pull-out tests were conducted in order to know the combined effects of adhesion and interlocking of soil with the geogrids. Tensar SS2 geogrids and bamboo grids were used with clayey sand and weathered clay which is much available in Thailand. From the investigation, it was found that the interaction between soil and geogrids consists of : (a) the adhesion between soil and reinforcement on the sol~d surface area of the geogrids embedded in soil; and (b) the bearing capacity of soil in front of the transverse members of geogrids. These members behave as the strip footing embedded in soil so that the bearing capacity could be mobilized in the soil, within the opening of geogrids and at the front of all transverse members. The proposed design procedure for pull-out resistance fairly agreed with the laboratory pull-out test results. Application of the proposed design procedure to a case study with the Public Works Department of Thailand showed that geogrids reinforced soil technique had much improved the stability of the irrigation canal bank. In addition, it was observed that bamboo grids have higher pull-out resistance per unit area than that of Tensar SS2 geogrids. One disadvantage of bamboo grids is of having low durability whereas the Tensar SS2 geogrids is more expensive. Finally, the cohesive fill was proved to be quite effective when used with geogrids reinforced soil system. |
| Year | 1986 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Geotechnical and Transportation Engineering (GT) |
| Chairperson(s) | Bergado, Dennes T. |
| Examination Committee(s) | Balasubramaniam, A.S. ;Chandra, Sarvesh ;Rantucci, Giovanni |
| Scholarship Donor(s) | The Government of Australia |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1986 |