超小净距并行盾构隧道施工安全控制技术研究  

Research on Construction Safety Control Technology of Ultra-small Spacing Parallel Shield Tunnel

作　　者：梁宇 LIANG Yu(BCEG Civil Engineering Co.,Ltd.,Beijing 100055,China)

机构地区：[1]北京建工土木工程有限公司,北京100055

出　　处：《施工技术（中英文）》2024年第10期67-72,共6页Construction Technology

基　　金：国家自然科学基金“高铁联合”基金(U1834208)。

摘　　要：为解决超小净距并行盾构施工安全掘进的技术难题,依托苏州地铁7号线枫红区间隧道工程,针对其超小净距交互影响问题,创新采用了“MJS咬合隔离墙+洞内径向深孔注浆+先隧道同步支顶+后行盾外克泥效注浆”的小净距并行盾构施工新型保护体系;自主研发了具有伺服精准控制、自动行走、大角度爬坡、小曲线转弯功能的同步平衡支顶系统;对外部荷载、夹层土水平位移、管片收敛、管线沉降进行监测分析,并揭示了不同条件下并行穿越附加荷载、夹层土水平位移变化规律及影响范围。最终实现了超小净距并行盾构施工安全控制。In order to solve the technical problem of safe tunneling in ultra-small spacing parallel shield construction,based on the Fenghong section tunnel project of Suzhou Metro Line 7,aiming at the problem of ultra-small spacing interaction,a new protection system for small spacing parallel shield construction is innovatively adopted,which is“MJS interlocking isolation wall+radial deep hole grouting in tunnel+synchronous support of tunnel first+mud effect grouting outside shield later”.A synchronous balance roof support system with servo precise control,automatic walking,large angle climbing and small curve turning function was independently developed.The external load,horizontal displacement of interlayer soil,segment convergence and pipeline settlement were monitored and analyzed,and the variation law and influence range of parallel crossing additional load and horizontal displacement of interlayer soil under different conditions were revealed.Finally,the safety control of ultra-small spacing parallel shield construction is realized.

关 键 词：隧道 盾构 双线并行 同步支顶 监测 

分 类 号：U455[建筑科学—桥梁与隧道工程]