由于黄土具有结构性、欠压密性和土结构性受损易发生湿陷等特性，再加上会路连拱隧道施工开挖工序多，结构受力复杂。

Loess has the characteristics of structural properties, such as incomplete consolidation, collapsibility; and the multi-arch tunnel of highway has complex excavation steps and structure stress.

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内容涉及湿陷性黄土、软土、膨胀岩土、红土、软岩和特殊土的结构性。

These special rocks and soils include collapsible loess, soft soil, expansive rock and soil, red soil, soft rock, and special soils.

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内容涉及湿陷性黄土、软土、膨胀岩土、红土、软岩和特殊土的结构性。

These special rocks and soils include collapsible loess, soft soil, expansive rock and soil, red soil, soft rock, and special soils.

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