北京地铁区间隧道浅埋暗挖法穿越河流桥桩综合施工技术

北京地铁十号线10标段区间隧道采用浅埋暗挖法穿越西坝河桥桩,施工风险高、难度大。在介绍了该区间隧道的工程特点和工程地质条件后,较为详细地分析了区段的施工方案及其特点、旋喷咬合桩、深层搅拌桩、台阶法施工等关键施工技术,可为类似城市地下工程的施工提供参考。

Synthetical Construction Techniques for Crossing the River and Piles by Shallow Tunnelling Method in Beijing Metro

The section tunnels in Lot 10 of Beijing Metro Line No.10 is constructed by Shallow Tunnelling Method to under-cross the Xibahe River and the plies in it.The construction of this section tunnels is of high risks due to its difficulties resulting from the complicated and comprehensive geological conditions(mainly for the saturated sand strata above,in and bellow the tunnel elevations) and the much close distances between the tunnel and the piles.This paper makes a brief introduction about the project profile and geological conditions,then gives a detailed analysis on the characteristics of the Method Statement,Construction of Jetting and Mixing Piles,Stage Tunneling Method etc.,which may be useful for the similar underground works.