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Liquefaction behaviour focusing on pore water inflow into unsaturated surface layer
| Content Provider | Scilit |
|---|---|
| Author | Takada, Y. Ueda, K. Iai, S. Mikami, T. |
| Copyright Year | 2018 |
| Description | It has been pointed out that the effect of partially saturated surface layer cannot be ignored when ground is liquefied. In this research, a series of centrifuge tests was made to clarify the effect of pore water inflow into a partially saturated surface layer during liquefaction. Four tests were carried out by changing groundwater level and pore fluid type (water or viscous fluid). The extent of the expansion of saturated area during and after shaking was different among the cases. Comparison between liquefied and non-liquefied cases indicated that there were obvious differences: a part of the unsaturated layer changed into a saturated one due to the seepage. In addition to the tests, three phase numerical analyses which take the effect of pore air pressure into consideration were performed for the centrifuge tests. The simulation well captured the change of the degree of saturation and the response of excess pore water. It has been pointed out that the effect of partially saturated surface layer cannot be ignored when ground is liquefied. In this research, a series of centrifuge tests and two-dimensional effective stress analyses are made to clarify the effects of an unsaturated surface layer on liquefaction behaviour during and after earthquake. This chapter focuses on the change of the excess pore water pressure and the degree of saturation. To investigate the pore water inflow into partially saturated layer due to liquefaction, a series of centrifuge tests and two dimension effective stress analyses were conducted in this research. First, when the saturated ground was liquefied, the pore water in it infiltrated into the partially saturated layer and caused the change of the degree of saturation. Second, the change of the degree of saturation in the unsaturated layer is dependent on the excess pore water pressure and the ground water level. Book Name: Physical Modelling in Geotechnics |
| Related Links | https://content.taylorfrancis.com/books/download?dac=C2018-0-86960-X&isbn=9780429438646&doi=10.1201/9780429438646-39&format=pdf |
| Ending Page | 1021 |
| Page Count | 5 |
| Starting Page | 1017 |
| DOI | 10.1201/9780429438646-39 |
| Language | English |
| Publisher | Informa UK Limited |
| Publisher Date | 2018-07-11 |
| Access Restriction | Open |
| Subject Keyword | Book Name: Physical Modelling in Geotechnics Geological Engineering Surface Layer Centrifuge Pore Water Inflow Partially Saturated Liquefaction Behaviour Ground Is Liquefied |
| Content Type | Text |
| Resource Type | Chapter |
