求翻译：按照地质条件及地形因素综合分析，将隧道进口大兴端洞门设计成削竹式洞门，出口思南端洞门设计成直削式洞门；隧道纵断面坡道形式采用变坡点的单面坡；隧道采用新奥法施工，衬砌采用复合式衬砌，即由初期支护和二次衬砌及中间防水层组合而成的衬砌形式。其中用理正软件验算二衬。是什么意思？

Tunnel entrance in accordance with the comprehensive analysis of the geological conditions and topographical factors, the Daxing end of Portal is designed to cut bamboo tunnel portal, the export the Sinan side Portal design into a straight cut Portal; ramp in the form of tunnel longitudinal single-s