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新建引水隧洞施工对既有铁路隧道
稳定性影响
翁栏校
（成都成铁工程项目管理有限公司，成都 610031）
［摘 要 ］ 新建隧道施工会不可避免地对既有邻近铁路隧道产生不利影响。以攀枝花观音岩引水隧洞为
研究背景，采用三维有限元方法研究新建隧洞施工对既有铁路隧道稳定性的影响。研究结果表明：引水隧
洞近接施工对成昆铁路隧道的影响较小，开挖完成导致既有隧道顶部围岩出现拉应力；二衬最大竖向、水
平位移均满足变形控制标准；二衬最大弯曲压应力为0.95 MPa，二衬最大弯曲拉应力为15.2 kPa，均小于混
凝土容许应力。建议引水隧洞近接成昆铁路二坪子隧道段施工，距离隧道200 m范围内采用非爆破开挖，在
距离隧道200~1000 m内，采用控制爆破，爆破震动速度不大于2 cm/s。
［关键词 ］ 引水隧洞；近接施工；变形；应力；数值模拟
［中图分类号］ U 4549.1 ［文献标志码］ A ［文章编号］ 1001-523X （2022 ）05-00 91-04
INFLUENCE OF CONSTRUCTION OF NEW DIVERSION TUNNEL
ON STABILITY OF EXISTING RAILWAY TUNNEL
Weng Lan-xiao
［Abstract ］ The construction of a new tunnel will inevitably have an adverse effect on the existing adjacent
tunnels. Based on the research background of the Guanyinyan diversion tunnel in Panzhihua, the article uses the
three-dimensional finite element method to study the influence of the construction of the new tunnel on the stability
of the existing railway tunnel. The research results show that the adjacent construction of the diversion tunnel has
little impact on the Chengdu ~Kunming railway tunnel. The completion of the excavation result s in tensile stress in
the surrounding rock of the existing tunnel; the maximum vertical and horizontal displacements of the second lining
meet the deformation control standards; the maximum bending compressive stress of the second lining is 0.95 MPa,
and the maximum bending tensile stress of the second liner is 15.2 kPa, which are both less than the allowable
stress of concrete. It is suggested that the diversion tunnel should be constructed close to the Erpingzi tunnel
section of the Chengdu~Kunming Railway. Non-blast excavation should be used within 200 m of the tunnel, and
controlled blasting should be used within the range of 200-1 000 m. The blasting velocity should be not more than
2 cm/s.
［Keywords ］ diversion tunnel ；adjacent construction ；deformation ；stress ；numerical simulation
在山区修建隧道时，会受到地形、地质条件、线
路及近接工程限制。观音岩引水工程项目为攀枝花市
重大民生工程，可以解决攀枝花市区内多年的饮用水
健康问题，该隧洞工程与既有成昆铁路渡口直线二坪
子隧道属于近接关系。
吴波等 [1]采用数值模拟的办法，对三台阶七步开
挖的隧道施工稳定性进行分析，探究不同溶洞发育位
置对近接高速铁路隧道的影响。
熊开勇 [2]研究了复杂下伏采矿巷道对新建软岩隧
道施工的影响，认为两者距离大于5 m时，新建隧道
稳定性较好。
王超东等 [3]以福州地铁2号线为工程背景，通过
室内模型试验探究盾构不同上穿角度对近接既有隧道
稳定性的影响。
李卓霖等 [4]以珠海横琴马骝洲
新建引水隧洞施工对既有铁路隧道稳定性影响（论文）.pdf
