盾构隧道加固体微扰动控制效果分析与优化研究  

Analysis and Optimization of Micro-disturbance Control Effect of Reinforcement Body in Shield Tunnel

作　　者：万颖君 王法鑫 朱晓珍 赵艳琪 宋德威 孙阳[2,4] WAN Yingjun;WANG Faxin;ZHU Xiaozhen;ZHAO Yanqi;SONG Dewei;SUN Yang(Hangzhou Communications Investment Group Co.,Ltd.,Hangzhou 310000,Zhejiang,China;College of Port,Coastal and Offshore Engineering,Hohai University,Nanjing 210000,Jiangsu,China;Zhejiang Scientific Research Institute of Transport,Hangzhou 310000,Zhejiang,China;Huai'an Research Institute,Hohai University,Huai'an 223000,Jiangsu,China)

机构地区：[1]杭州交通投资建设管理集团有限公司,浙江杭州310000 [2]河海大学港口海岸与近海工程学院,江苏南京210000 [3]浙江省交通运输科学研究院,浙江杭州310000 [4]河海大学淮安研究院,江苏淮安223000

出　　处：《建筑施工》2025年第4期505-511,共7页Building Construction

基　　金：浙江省交通运输厅科技计划项目(202229)。

摘　　要：为分析新建航道对下卧盾构隧道扰动影响及研究所需加固措施,以京杭运河二通道(杭州段)下卧杭州地铁一号线工程为背景,采用小应变硬化本构建立了2种加固方案的有限元计算模型。模拟不同方案对隧道的微扰动控制效果,利用现场监测数据验证模型的合理性;分析了MJS加固长度、宽度、置换率以及抗拔桩长度、加固体厚度、位置及堆载大小7个因素对扰动控制的作用机理;结合敏感性因素追加试验对加固体结构形式进行了优化设计,为地铁微扰动控制提供了科学的优化建议。结果表明,2种方案的整体隧道变形趋势基本一致,最大竖向隆起和最大竖向沉降出现工况相同;采用MJS加固对隧道的变形控制效果更好;最终优化方案使隧道最大隆起减小至5.8 mm,相比于现行方案减小了34.9%。To analyze the disturbance effect of the new waterway on the underlying shield tunnel and the required reinforcement measures,the project of Hangzhou Metro Line 1 under the second channel of the Beijing-Hangzhou Canal(Hangzhou section)is used as the background.Finite element calculation models for two reinforcement schemes are established using the small strain hardening constitutive law.The control effects of different schemes on micro-disturbance are simulated,and the rationality of the model is verified by field monitoring data.The mechanism of seven factors—MJS reinforcement length,width,replacement ratio,uplift pile length,reinforcement body thickness,position,and loading size—on disturbance control is analyzed.With additional tests on sensitivity factors,the reinforcement structure form is optimized,providing scientific optimization suggestions for subway micro-disturbance control.The results show that the overall deformation trends of the two schemes are basically the same,with the maximum vertical heave and maximum vertical settlement occurring under the same conditions.The deformation control effect of the tunnel reinforced by MJS is better.The final optimized scheme reduces the maximum heave of the tunnel to 5.8 mm,which is 34.9%lower than the current scheme.

关 键 词：MJS 盾构施工 数值模拟 土体位移 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]