常見例句It is easily collapsed for shallow and unsymmetrical large-span tunnel near portal in soft rock.軟巖地區(qū)淺埋偏壓大跨度隧道進口段極易塌方。The ground settlement of a shallow metro tunnel by excavation has important effect on the construction safety.淺埋暗挖地鉄隧道施工期地表沉降量對施工安全具有重要意義。 返回 shallow-buried