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In the design scheme of asphalt concrete core rockfill dam, the axis of diaphragm of dam foundation and asphalt concrete core wall is overlapped. However, due to construction errors and other reasons, the axis of diaphragm of dam foundation and asphalt concrete core wall may not be completely overlapped. Based on the finite element analysis method, the stress behavior of diaphragm of dam foundation and asphalt concrete core wall under different offsets was studied. The results show that under the superposition of axes, the local tensile stress of the diaphragm of dam foundation is in a state of no or small in the construction period and operation period, which has little influence on the whole. The minor offset of the axis of the diaphragm of dam foundation to the downstream will have a certain adverse effect on the stress of the diaphragm of dam foundation during operation. The main performance is that the local tensile stress of the downstream face of the diaphragm of dam foundation increases, and there is stress concentration. The local tensile stress increases by 3.6 times compared with that without offset. The concrete base of the asphalt concrete core wall can be slightly extended to the downstream according to the offset of the diaphragm of dam foundation, which can reduce the local tensile stress of the downstream surface of the diaphragm of dam foundation by 59.3 % and weaken the stress concentration, so as to improve the stress state of the diaphragm of dam foundation. The finite element simulation analysis can provide support for safety evaluation and selection of engineering treatment measures under eccentric condition of diaphram of dam foundation.
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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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