超前泄水-注浆耦合效应下富水破碎带隧道掌子面稳定控制OA
Stability Control of Tunnel Face in Water-Rich Fractured Zone under Coupling Effect of Advanced Drainage and Grouting
[目的]隧道在修建过程中穿越富水断层破碎带时极易发生突水突泥灾害,严重影响隧道施工安全,需明确施工过程中掌子面稳定性、防突体厚度以及掌子面超前泄水-注浆加固方案的效果.[方法]以沈阳至白河高速铁路西古隧道为依托,建立流固耦合三维有限元模型,通过三因素四水平正交试验,提出综合考虑力学变形和渗流效果的掌子面稳定性评价体系.[结果](1)隧道穿越富水破碎带最小防突体厚度综合确定为 4 m;(2)单根泄水管的排水量和其所处位置相关,越靠近拱顶,排水能力越差,随着泄水管数量的增多,泄水管的总排水量增大,掌子面最大挤出位移下降;(3)随着注浆圈厚度的增大,掌子面挤出位移减小明显,且围岩产生最大位移位置向注浆圈外边缘偏移;(4)各因素对掌子面影响程度的主次关系为泄水管根数>注浆圈厚度>泄水管超前长度.[结论]相较于不采取加固措施,采用掌子面超前泄水-注浆加固后不仅能有效控制掌子面挤出位移,还能减小已支护段二次衬砌的结构变形和内力.研究结果可为类似隧道工程施工提供借鉴与参考.
[Objective]When a tunnel crosses a water-rich fault fractured zone during construction,it is highly prone to water and mud inrush disasters,which seriously affect the safety of tunnel construction.This study aims to clarify the stability of the tunnel face,the thickness of the anti-inrush body,and the effectiveness of the advanced drainage-grouting reinforcement scheme for the tunnel face during construction.[Methods]Based on the Xigu tunnel of the Shenyang-Baihe high-speed railway,a three-dimensional fluid-solid coupling finite element model was established.Through a three-factor,four-level orthogonal test,a tunnel face stability evaluation system that comprehensively considered mechanical deformation and seepage effects was proposed.[Results](1)The minimum thickness of the anti-inrush body for the tunnel crossing the water-rich fractured zone was determined to be 4 m.(2)The drainage capacity of a single drainage pipe was related to its location:the closer it was to the crown,the worse the drainage capacity.As the number of drainage pipes increased,the total drainage capacity of the pipes increased,and the maximum extrusion displacement of the tunnel face decreased.(3)As the thickness of the grouting ring increased,the extrusion displacement of the tunnel face decreased significantly,and the location of the maximum displacement of the surrounding rock shifted to the outer edge of the grouting ring.(4)The order of influence of the factors on the tunnel face,from most to least significant,was:number of drainage pipes>thickness of the grouting ring>advanced length of drainage pipes.[Conclusion]Compared with taking no reinforcement measures,the use of advanced drainage-grouting reinforcement for the tunnel face can not only effectively control the extrusion displacement of the tunnel face but also reduce the structural deformation and internal forces of the secondary lining in the supported section.The results of the study can provide a reference for the construction of similar tunnel projects.
刘传祥;张康健;张志强;王珣
西南交通大学极端环境岩土和隧道工程智能建养全国重点实验室,成都 610031||西南交通大学土木工程学院,成都 610031西南交通大学极端环境岩土和隧道工程智能建养全国重点实验室,成都 610031||西南交通大学土木工程学院,成都 610031西南交通大学极端环境岩土和隧道工程智能建养全国重点实验室,成都 610031||西南交通大学土木工程学院,成都 610031中铁九局集团有限公司,沈阳 110013||中铁九局集团第二工程有限公司,吉林 132001
交通工程
铁路隧道富水破碎带掌子面超前泄水注浆正交试验
railway tunnelwater-rich fractured zonetunnel faceadvanced drainagegroutingorthogonal test
《铁道标准设计》 2026 (6)
154-165,197,13
国家自然科学基金项目(52378414)
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