摘要
为研究溶蚀裂隙地层隧道破坏特征及处置技术,以梁王山隧道为工程背景,结合现场测试、理论分析等方法研究了溶蚀裂隙地层隧道破坏机理,建立了隐伏溶蚀裂隙影响下深埋隧道的破坏模式。研究结果表明:溶蚀裂隙对应力传递具有阻隔作用,其低刚度特性导致了不均匀应力分布及破坏,且结构整体破坏程度会加剧。受水压和自重的影响存在失稳风险,具体可表现为梁体固端受弯破裂、梁体固端剪切破裂两种形式,同时在裂隙尖端应力集中的影响下,裂隙附近的围岩较破碎,在隧道施工期易诱发渗漏水、塌方和突涌水等灾害;最终制定了注浆和支护加固的处置措施。研究成果可为类似地质隧道施工提供重要参考。
To study the characteristics and disposal techniques of tunnel failure in dissolved and fractured area,taking Liangwangshan Tunnel as the engineering background,the failure mechanism of tunnel was studied by combining on-site testing,theoretical analysis and other methods.The failure mode of deep buried tunnel under the influence of concealed dissolution fractures was established.The research results indicate that dissolution fractures have a barrier effect on stress transmission.The low stiffness characteristics lead to uneven stress distribution and failure,and the overall degree of structural damage will be exacerbated.There is a risk of instability due to the influence of water pressure and self weight,which can be manifested in two forms:bending fracture at the fixed end of the beam,and shear fracture at the fixed end of the beam.At the same time,under the influence of stress concentration at the crack tip,the surrounding rock near the crack is relatively fragmented,which can easily induce disasters such as water leakage,collapse,and sudden water inrush during tunnel construction.Finally,disposal measures for grouting and support reinforcement are formulated.The research results can provide important references for similar geological tunnel construction.
作者
赵楚军
ZHAO Chujun(China Railway Construction Yunnan Investment Co.Ltd.,Kunming Yunnan 650000,China)
出处
《铁道建筑技术》
2025年第9期111-114,共4页
Railway Construction Technology
基金
中国铁建昆仑投资集团有限公司科技研究开发计划项目(KLTZ-KX01-2020-009)。
关键词
溶蚀裂隙
隧道
现场测试
处置措施
dissolved fracture
tunnel
on-site testing
disposal measure
作者简介
赵楚军(1983-),男,湖南双峰人,高级工程师,主要研究方向为隧道工程建设管理及灾害防治,E-mail:183649589@qq.com。
