·1812 ·
新建地铁隧道曲线下穿既有地铁施工影响控制研究
谭 敏
（北京建工土木工程有限公司，100015，北京）
摘 要： 为保证新建隧道曲线近接既有地铁安全施工，采用工程调研的方法研究了该工程的主要风险，
对近接施工风险和既有运营结构现状进行了调查分析；结合工程施工风险调研结构和既有结构现状调查，有
针对性地提出了施工加固措施，并结合现场实施结构对提出的风险控制措施进行了验证。结果表明：（ 1）
该工程曲线下穿段包括曲线下穿车站风道和既有运营地铁隧道，其中下穿车站风道施工为一级风险，下穿地
铁区间施工为特级风险；（2）曲线下穿段近接施工风险控制措施：上半断面深孔注浆；区间洞内增设临时
仰拱；缩小格栅步距，由750mm变为500mm；（3）现场监测所有监测指标均在安全阈值内，新建隧道、
既有车站风道和既有地铁区间的变形均在安全阈值内，拟定的风险控制措施保证新建隧道顺利下穿既有地铁
风道和既有地铁区间。
关键词： 隧道工程；曲线近接下穿；施工风险
中图分类号：U 25 文献标志码：A 文章编号：1000-4726(2023)15-1812-03
RESEARCH ON IMPACT CONTROL OF CURVED CROSSING OF NEW SUBWAY TUNNEL
BELOW EXISTING SUBWAY
TAN Min
(BCEG Civil Engineering Co., Ltd., 100015, Beijing, China)
Abstract: In order to ensure the safe construction of the new tunnel curve close to the existing
subway, the main risks of the project are studied by the method of engineering investigation, and the
construction risks of the close connection and the status quo of the existing operation structure are
investigated and analyzed. Combined with the construction risk investigation structure and the existing
structure status investigation, the construction reinforcement measures are put forward, and combined with
the site implementation structure to verify the proposed risk control measures, the results show that:
(1) The under curve section of the project includes the under curve station air duct and the existing
operating subway tunnel. the construction of the under curve station air duct is the first-level risk, and
the construction of the under subway section is the extra-level risk. (2) The construction risk control
measures for close connection in the lower penetration section of the curve are as follows: deep-hole
grouting in the upper half section. temporary invert is added in the interval cave, reduce the grille step
distance from 750mm to 500mm. (3) All monitoring indicators in the field monitoring are within the
safety threshold, and the deformation of the new tunnel, the existing station air duct and the existing
subway section are all within the safety threshold. The proposed risk control measures ensure that the
new tunnel can smoothly run under the existing subway air duct and the existing subway section. The
research results can provide reference for the establishment of similar tunnel construction monitoring and
early warning system.
Keywords: tunnel engineering; curved proximity crossing; construction risk
随着城市化的迅猛发展，城市轨道线路逐渐向网
状发展，新建隧道不可避免地要穿越既有运营建筑（构
筑）物。分析此类近接工程施工风险、制订合理的施
工影
新建地铁隧道曲线下穿既有地铁施工影响控制研究（论文）.pdf
