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With many hydropower resources, Southwest China is a crucial area for current and future hydropower construction. However, most southwestern regions have deep overburden problems and high seismic intensity. The impact of these problems on the regular operation of high-face rockfill dams cannot be ignored. This paper established two-dimensional finite element models of 100 m, 200 m, and 300 m high-face rockfill dams on 100 m-deep overburden. Under the action of long-period ground motion and conventional ground motion, the elastic-plastic constitutive model was used to study the dynamic response characteristics of face rockfill dams with different heights on the same deep overburden. Compared with conventional ground motions, the results show that long-period ground motions significantly influence the acceleration of deep overburdened high-face rockfill dams. As the height of the dam body increases, the peak acceleration of the dynamic response of the dam body gradually decreases. Moreover, under the action of long-period ground motion, the higher the dam body is, the greater the displacement increment of the dam body in a short time. In this way, the resulting deformation is also more significant, which is not conducive to the seismic stability of the dam. Therefore, when building panel rockfill dams in areas with deep overburden and frequent long-period earthquakes, the effect of long-period ground shaking should be considered as a part of seismic stability evaluation.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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