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A load-structure model for the underground interchange utility tunnel was established based on the response displacement method. Transverse seismic analysis was carried out on the underground interchange utility tunnel. The internal force, deformation, and damage responses of an underground cross interchange cast-in-place utility tunnel under seismic excitations along two main axes were analyzed. The results indicate that under major earthquakes, the inter-story displacement angle at the interchange node of the utility tunnel exceeds the standard limit by 167.50%, with tensile damage reaching 0.985, far exceeding the tensile damage limit, which marking it as the weakest part of the interchange utility tunnel. Due to significant differences in stiffness and deformation modes between the interchange node and standard segments, the deformation at joints near the interchange node is the greatest. Under major earthquakes, the deformation at the joints near the interchange node can be up to 20 mm and 18 mm in two directions, respectively. The maximum inter-story displacement angle between layers at the interchange node may not occur simultaneously. Under major earthquakes, the maximum inter-story displacement angle between layers exceeds that between the top and bottom slabs by 19.15%. Consequently, it is necessary to determine the most unfavorable condition based on the maximum inter-story displacement angle between layers. The findings can provide a reference for the transverse seismic design of interchange utility tunnels.
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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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