城际铁路长距离穿越高铁桥桩设计施工关键技术

发布时间：2018-03-24 12:50

  本文选题：盾构隧道　切入点：长距离穿越　出处：《铁道标准设计》2017年12期

【摘要】：广佛环城际区间长距离穿越运营高铁桥桩,地面为交通干道,地下管线十分密集,部分管线埋深大,无迁改条件,工程风险和社会风险极高,为解决上述难题,对穿越桥桩关键技术进行研究。研究表明:长距离穿越前,详细查明既有管线及桥桩基础资料,线路设计确保距离敏感构筑物一定安全距离,减少地质突变段落;选择合理工法和掘进参数;提前进行施工影响预测,对敏感物设置全面监测点和有效预警值,对风险源设置应急预案;掘进过程中对于地质突变段优先选择土压平衡掘进模式;通过采取上述关键措施可以保证盾构长距离穿越既有桥桩施工及周边环境安全。
[Abstract]:In order to solve the above problems, the inter-city section of Guangfo Huan runs through the long distance of the high-speed railway bridge pile, the ground is a traffic trunk road, the underground pipeline is very dense, some of the pipelines are buried deep, there are no conditions for relocation, and the project risk and social risk are extremely high. The key technology of crossing bridge pile is studied. The research shows that before long distance crossing, the existing pipeline and bridge pile foundation data are found out in detail, and the route design ensures a certain safety distance for the distance sensitive structure and reduces the geological abrupt section; Select reasonable construction method and tunneling parameters, carry out construction impact prediction ahead of time, set up comprehensive monitoring points and effective early warning values for sensitive objects, set emergency plan for risk sources, give priority to earth pressure balance tunneling mode for geological abrupt section during excavation; The key measures mentioned above can ensure the safety of shield tunneling through the existing bridge piles and surrounding environment.
【作者单位】： 中铁第一勘察设计院集团有限公司桥隧处;
【分类号】：U455.43
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本文编号：1658373