地铁区间隧道下穿既有桥梁桩基础加固措施

Study on the reinforcement measure for subway tunnel passing through existing bridge piles

结合北京地铁九号线前矿山法隧道穿越既有人行天桥桩基的施工实例,介绍了天桥桩基础的加固措施和隧道内的加固措施,控制了隧道上方桥梁桩基沉降和位移,确保桥梁和隧道结构的安全施工。

Combining with the construction practice of the mining tunnel in Beijing metro line No.9 passing through existing bridge piles,the reinforcement measure for existing bridge pile and tunnel is introduced in detail.It controls the bridge piles settlement and displacement upon the tunnel,and ensures the safe construction of bridge and tunnel structure.