| 浅埋盾构隧道水下岩溶处治与施工控制技术 |
| 投稿时间：2018-07-31 修订日期：2018-07-31 点此下载全文 |
| 引用本文：朱考飞,张可能,毛亚军,等.浅埋盾构隧道水下岩溶处治与施工控制技术[J].钻探工程,2018,45(10):16-20.ZHU Kao-fei,ZHANG Ke-neng,MAO Ya-jun,et al. Underwater Karst Treatment and Construction Control Technology for Shallow Shield Tunnel[J]. Drilling Engineering, 2018,45(10):16-20. |
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| 基金项目:中南大学中央高校基本科研业务费专项资金项目“长沙红层岩溶对水下地铁隧道的影响研究”（编号：2018zzts071）；湖南省建设行业科技计划项目“岩溶发育区浅埋盾构隧道下穿河道风险分析及施工关键技术研究”（编号：KY2017050） |
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| 中文摘要:长沙地铁5号线晚朝区间盾构下穿浏阳河，隧道覆土浅，洞身全风化砾岩及上部砂砾层工程性质较差。隧道底板中风化钙质砾岩中发育岩溶，溶腔最大高度达15.8 m，主要充填物为松散圆砾及砂土。盾构下穿施工前，通过搭建水上作业平台，采用快速可控袖阀管注浆技术，高效处治岩溶。盾构下穿施工过程中，面对浅覆土水下掘进、富水地层、底板发育岩溶及侧穿桥梁桩基的复杂条件下，采取多项关键技术，有效规避风险，工程顺利高效，相关技术经验值得借鉴参考。 |
| 中文关键词:水下隧道 盾构施工 岩溶处治 注浆 施工技术 |
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| Underwater Karst Treatment and Construction Control Technology for Shallow Shield Tunnel |
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| Abstract:Shield tunneling of Changsha Metro Line 5 crossed Liuyang River where the tunnel was covered with shallow overburden and the engineering properties of the whole weathered conglomerate and the upper gravel layer wer poor. Karst is developed in weathered calcareous conglomerate in the tunnel floor with the maximum height of the cavern up to 15.8 m which is filled by loose conglomerate and sandy soil. Before shield tunneling, the fast-controllable sleeve valve pipe grouting technology was used to treat the karst efficiently on a platform built on the river. During crossing operations, several key technologies had been adopted to deal with the complex conditions, such as shallow under water overburden, water rich formation, karst developed floors, closeness to the bridge pile foundation, to avoid risks effectively, and the engineering experience is worthy of reference. |
| keywords:underwater tunnel shield tunneling karst treatment grouting construction technology |
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