摘要
为解决运营高铁隧道底隆导致无碴轨道变形影响行车安全的问题,以ZJY高铁隧道为对象,基于隧道底隆的处置实践过程与整治效果分析,对高铁隧道列车行车安全控制措施进行探讨,提出隧道底隆的预防与整治建议。主要结论有:(1)轨道顺坡精调只能短时缓解底隆导致轨道变形引起的轨道质量不良,而不能根除;(2)隧道底隆未根治而带缺陷开通运营,除导致工务维修工作量大幅攀升外,限速措施对运营秩序的冲击也不可小觑,底隆的最佳整治时间应在开通运营前;(3)正确勘察研判、针对性设计、严格科学施工是预防隧道底隆的前瞻性和根本性路径。实践证明:以隧底锚固为主要技术手段的整治方案对MPa级的高地应力型底隆是无效的,同时易产生不确定的行车安全风险;以辅助导坑进入正洞下方,构建柔性支护的中小断面导洞以阻断高地应力传递路径,是高地应力隧道底隆整治的方向性方案。
The bottom heave of an operating high-speed railway tunnel induces deformation of ballastless track,and further affects traffic safety.Accordingly,the driving safety control measures of high-speed railway trains are discussed and some suggestions on the prevention and remediation of tunnel floor heave are put forward based on analysis of the treatment practice process of floor heave of a high-speed railway tunnel.The main conclusions are drawn as follows.(1)The fine adjustment of track along a slope can only relieve the poor track quality caused by floor heave-induced track deformation temporarily,but cannot eliminate it.(2)If the tunnel is open for operation with bottom heave disease,not only the maintenance workload would be greatly increased,but the operation order would be greatly affected.The optimal rectification time for floor heave is before operation.(3)The prospective and essential way to prevent tunnel floor heave lies in accurate investigation and judgment,targeted design,and strict scientific construction.The practical results show that the treatment scheme with anchoring technology for tunnel floor heave is invalid under MPa-level geostress,whereas an assistant flexible-supported small cross-section pilot tunnel will be a possible way to prevent tunnel floor heave under large geostress.
作者
周保安
吴剑
王立川
龚伦
马相峰
许召强
赵伟
张鹏
ZHOU Bao′an;WU Jian;WANG Lichuan;GONG Lun;MA Xiangfeng;XU Zhaoqiang;ZHAO Wei;ZHANG Peng(China Railway Chengdu Group Co.,Ltd.,Chengdu 610082,Sichuan,China;China Railway Southwest Research Institute Co.,Ltd.,Chengdu 611731,Sichuan,China;Central South University,Changsha 410075,Hunan,China;Southwest Jiaotong University,Chengdu 610031,Sichuan,China;China Railway 18th Bureau Group Co.,Ltd.,Tianjin 300222,China;China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,Hubei,China)
出处
《隧道建设（中英文）》
CSCD
北大核心
2021年第3期474-482,共9页
Tunnel Construction
基金
国家自然科学基金资助项目(高铁联合基金)(U1934211)。
关键词
高铁隧道
底隆
无碴轨道
行车安全
轨道顺坡精调
隧底锚固
high-speed railway tunnel
tunnel floor heave
ballastless track
railway traffic safety
track fine adjustment along slope
tunnel bottom anchoring
