摘要
盾构机穿越裂隙发育、富水泥岩等软弱地层时,施工稳定性与安全性面临严峻挑战。市域铁路成都至眉山线工程眉山段音眉盾构区间广泛穿越裂隙发育、富水软弱的泥岩地层,盾构施工过程中面临喷涌、结泥饼、管片上浮与姿态偏移等高风险问题。针对上述难题,文章基于渣土改良、同步注浆与多序注浆等关键环节,构建以“复合渣土调控+增稠型双液浆+中盾注泥+环封注浆”为核心的协同控制机制。在典型盾构区间开展现场试验与全过程监测。结果表明:盾构喷涌与结泥饼风险显著降低,管片上浮量由原始110 mm降至30 mm以内,姿态偏差率控制达100%;地表沉降范围稳定控制在±20 mm以内,周边建筑物未发生明显沉降。研究成果可验证协同控制机制在复杂地质条件下的适应性与有效性,为类似泥岩地层盾构施工提供成套技术方案与实践依据。
When shield machines traverse weak strata such as fissure-developed,water-rich mudstone,construction stability and safety face severe challenges.The Yinmei shield section of the Meishan segment in the Chengdu-Meishan urban region railway project extensively traverses fissuredeveloped,water-rich,and weak mudstone strata.During shield construction,high-risk issues such as water gushing,soil cake formation,segment uplifting,and attitude deviation were encountered.To address the above difficulties,based on key processes such as residue conditioning,synchronous grouting and multi-sequence grouting,this article constructs a collaborative control mechanism centered on“composite residue regulating+thickening-type double-fluid grout+shield body soil injection+ring sealing grouting”.Field tests and full-process monitoring were conducted in typical shield intervals.The results indicate that the risks of shield water gushing and soil cake formation were significantly reduced;the segment uplifting was reduced from an original 110 mm to within 30 mm;attitude deviation control rate reached 100%;surface settlement range was stably controlled within±20 mm;and surrounding buildings did not exhibit significant settlement.The research results could verify the adaptability and effectiveness of the collaborative control mechanism under complex geological conditions,providing a complete set of technical solutions and practical basis for similar shield construction in mudstone strata.
作者
彭湛军
吴思航
施以旋
张建宇
刘欣
PENG Zhanjun;WU Sihang;SHI Yixuan;ZHANG Jianyu;LIU Xin(Sichuan Chengmei Rail Transit Co.,Ltd.,Chengdu Sichuan 610041,China;School of Remote Sensing Information Engineering,Wuhan University,Wuhan Hubei 430070,China;State Key Laboratory of Rail Transit Vehicle System,Southwest Jiaotong University,Chengdu Sichuan 610031,China;China Railway No.2 Engineering Group Co.,Ltd.,Chengdu Sichuan 610031,China;China Railway Engineering Services Co.,Ltd.,Chengdu Sichuan 610083,China)
出处
《现代城市轨道交通》
2025年第12期11-16,共6页
Modern Urban Transit
基金
国家重点研发计划(2023YFB2603700)
中国博士后科学基金(2023TQ0253)
西南交通大学轨道交通运载系统全国重点实验室开放课题(RVL2505)。
关键词
市域铁路
泥岩地层
盾构施工
渣土改良
管片上浮
协同控制
urban region railway
mudstone strata
shield construction
residue conditioning
segment uplifting
collaborative control
