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隧道大多处于山丘地区,洞口的开挖刷方及修筑施工便道加大了对原地表的植被破坏,现在的许多工程对环保的要求高。零开挖出洞在加强支护和监控量测的情况下保证了施工安全,也可减少施工对原地表植被的破坏。
Most of the tunnels are in hill areas. The excavation of the tunnels and the construction of pavements have increased the vegetation damage to the original surface. Nowadays, many projects require high environmental protection. Zero excavation of the hole to strengthen the support and monitoring measurements to ensure the construction safety, but also reduce the damage to the original surface vegetation.