西渝高铁康渝段大象洞隧道贯通|jj又长又大又硬又粗又黄
1. 又粗又硬是成语吗
中新网成都10月29日电 (记者 刘忠俊)10月29日,西渝高铁安康至重庆段(以下简称“西渝高铁康渝段”)大象洞隧道顺利贯通,标志着该线路全线隧道施工进入攻坚冲刺阶段。

西渝高铁是我国“八纵八横”高铁网京昆通道、包(银)海通道的重要组成部分,路网战略地位突出。其中康渝段正线长478公里,起于安康西站,经陕西安康、重庆城口,四川达州、广安,重庆合川、北碚,终至重庆西站。
大象洞隧道位于四川省达州市宣汉县境内,由中铁二十局集团承建,为单洞双线铁路隧道,全长249米。隧道地处巴山大峡谷国家4A级景区与省级自然保护区,且需下穿景区核心溶洞“大象洞”,生态保护与施工安全要求严苛。
项目进场施工以来,施工团队摒弃传统爆破,采用“机械开挖+人工精细修整”模式,将施工振动降至最低,减少对岩层与溶洞的扰动。同时运用锚杆框架梁加固、三维植被网护坡等技术,构建“刚性支护+柔性修复”防护体系,实现“生态零扰动”。“此举有效保障了巴山大峡谷自然保护区生态环境。”中铁二十局西渝高铁项目一分部经理李成志称。
据悉,西渝高铁通车后,将与成渝高铁、郑渝高铁等已运营线路,及渝昆、西延、西十高铁等在建线路互联互通,助力中西部路网完善,便利沿线群众出行。(完)
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