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| 盾构穿湖隧道施工风险控制与安全评估 |
| Risk control and safety evaluation of lake-crossing shield tunnels |
| 投稿时间：2024-03-12 修订日期：2024-03-21 |
| DOI： |
| 中文关键词: 盾构穿湖隧道;喷涌;坍塌;风险控制;安全评估 |
| 英文关键词: lake-crossing shield tunnel; gush; collapse; risk control; security assessment |
| 基金项目:湖南省教育厅科学研究优秀青年项目(23B0476) |
| 作者 | 单位 | 邮编 | | 胥明* | 南昌轨道交通集团有限公司 | 330200 | | 源小梦 | 湖南科技大学 资源环境与安全工程学院 | 411201 |
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| 中文摘要: |
| 针对南昌轨道交通1号线瑶湖东站~瑶湖西站区间盾构施工下穿瑶湖,遭遇富水砂层、上软下硬不均质地层、淤泥软土地层等不良地质,极易发生喷涌、盾构机上浮、掌子面失稳、地面沉降和塌陷等重大突发性工程事故,制定了风险控制方案,并采用WBS-RBS风险辨识方法进行了安全评估。研究结果表明,采取端头地基加固及降水、优化盾构掘进参数、控制盾构姿态与掘进速率、实施信息化施工等措施可以有效预防喷涌、软土塌陷、盾构上浮、盾构偏心等风险,盾构施工区间总体风险等级由Ⅱ级降低至Ⅲ级以下,确保了穿湖盾构隧道安全、高效的掘进。本文穿湖盾构隧道施工风险控制方案可为今后类似工程提供参考和借鉴。 |
| 英文摘要: |
| Under the construction of shield tunneling between Yao hu East Station and Yao hu West Station of Nanchang Rail Transit Line 1, which encountered poor geology such as a water-rich sand layer, an uneven layer of top soft and bottom hard, and a soft soil layer. It was vulnerable to causing engineering accidents including spillage, shield floating on board, instability of the shield tunnel face, ground subsidence, ground subsidence and collapse and collapse. The risk control system is built, and the safety assessment is carried out by WBS-RBS risk identification approach. The research results demonstrate that the measures of end foundation reinforcement and precipitation, optimization of shield tunneling parameters, control of shield attitude and tunneling rate, and application of information in construction can effectively prevent the risks of gushing, soft soil collapse, shield floating, and shield eccentricity. The overall risk rating of the shield section has been decreased from II to less than III, guaranteeing the safe and efficient tunneling of the shield tunnel throughout Lake-crossing. The construction scheme of the lake-crossing shield tunnel in this paper can be used as a reference for future shield tunnel construction. |
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