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2012年02期
| 标题 |
| 地铁穿越砂卵石富水地段支护施工技术(52卷) |
| 英文标题 |
| Construction technology of support of metro tunnel in water-rich gravelly sand stratum |
| 摘要 |
| 结合北京地铁穿越砂卵石富水地段的施工，对隧道的支护以及在砂卵石中管棚施工的钻机钻进施工技术进行了探讨和介绍。通过在拱墙部位施作30 m超前长管棚注浆并辅以单排超前小导管补注浆进行超前支护，形成棚架作用；采用三台阶预留核心土人工开挖，及时施作初期支护，并设置临时仰拱、横撑和竖撑加强支护；跟进径向注浆和隧道底板注浆，扩大固结范围和封堵初支渗水；二次衬砌紧跟，完成隧道施工。确保了在复杂地质条件下的隧道开挖安全。 |
| 作者 |
| 新闻作者:梁乐文 |
| 关键字 |
关键词:地铁 砂卵石 富水 支护钻进技术 |
