北京地铁苏州街站细砂地层暗挖施工超前支护

On advanced support in tunnel excavation in sand stratum of Suzhou station of Beijing subway

结合具体工程实例,介绍了地铁车站细砂地层中暗挖施工的超前支护方法,即对开挖拱部的不稳定的细砂地层进行打管注浆加固,选用改性水玻璃作为浆液材料,处理结果表明该施工工艺完全达到了加固地层的预期效果。

Combining with practical project example,it introduces advanced support technology in tunnel excavation in sand stratum of subway construction,which means the reinforcement of unsteady sand stratum of excavated arch by pipe driven and pipe grouting,and modified sodium silicate is chosen as the serous material.The treatment result shows that this construction craft totally succeeds in the expected goal of stratum reinforcement.