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新建轨道线区间隧道下穿既有线路变形影响分析
杜坤鹏
（中国铁路设计集团有限公司，天津 300308）
［摘 要 ］ 以武汉新建轨道交通12号线盾构区间下穿既有2号线长~汉盾构区间为工程背景，采用三维数
值模拟分析新建线路施工对既有轨道交通变形的影响。研究结果表明：盾构掘进施工对既有结构及线路影
响较小，盾构隧道贯通后区间结构最大竖向位移为–4.96 mm，最大水平位移为0.309 mm， 2号线盾构区间累
计最大沉降量为–2.86 mm，区间结构变形量和沉降量在相关规范控制范围内，满足区间安全运营要求。通
过设计上加强管片配筋、增加注浆孔，隧道施工中加强掘进参数控制和及时同步注浆，加强二次注浆，同
时对2号线长港路站—汉口火车站区间设置监测点，指导施工，保证地铁安全运营。
［关键词 ］ 地铁；盾构；区间隧道；既有轨道；数值模拟
［中图分类号］ U 455 ［文献标志码］ B ［文章编号］ 1001 -523X （2022 ）09-0105 -03
ANALYSIS ON THE INFLUENCE OF THE DEFORMATION OF THE NEWLY-BUILT
TRACK TUNNEL UNDERNEATH THE EXISTING LINE
Du Kun-peng
［Abstract ］ In view of the great influence of the new subway track tunnel under the existing line, taking the
shield section of the existing Changgang Road Station to Hankou Railway Station as the engineering background,
the influence of the settlement and deformation of the existing rail transit structure is evaluated by three-dimensional
numerical simulation.The research results show that the shield tunneling construction has little influence on the
existing structure and line.After the shield tunnel is completed, the maximum vertical displacement of the interval
structure is-4.96 mm, the maximum horizontal displacement is 0.309 mm, and the cumulative maximum settlement
of the shield interval of Line 2 is-28.6 mm.The deformation and settlement of the interval structure are within the
control range of the relevant codes, which can meet the requirements of safe operation.Through strengthening the
reinforcement of segments and increasing grouting holes in design, strengthening the control of tunneling parameters
and timely synchronous grouting in tunnel construction, strengthening secondary grouting, and setting up monitoring
points in the section from Changgang Road Station to Hankou Railway Station of Line 2 to guide the construction,
ensure the safe operation of the subway.
［Keywords ］ subway; shield; interval tunnel; existing track; numerical simulation
地下轨道交通以其独特优势得到广泛发展，但
同时也带来地下不同构筑物对邻近建设的影响，处
理不当易造成重大建设事故 [1-4]，尤其是不同地下轨
道线路建设的相互影响。任艳超 [5]以成都地铁18号线
西博城站南段暗挖区间大跨隧道下穿既有城市道路隧
道为研究对象，采用模糊层次分析法对暗挖大跨隧
道下穿既有隧道施工风险概率进行多层次综合评估。
章邦超 [5]以广州地铁22号线盾构法下穿既有3 号线工
程为例分析关键施工技术。孙会良 [6]以南宁轨道交通
5号线下穿既有1 号线广西大学站工程为背景，采用
Midas GTS NX有限元软件建立三维数值计算模型，预
测穿越施工对既有车站、出入口的受力及变形影响。
目前，关于新建地铁隧道穿越
新建轨道线区间隧道下穿既有线路变形影响分析（论文）.pdf
