摘要
以郑州地铁5号线经三路站—未来北路区间盾构隧道锚索拔除施工为背景,对富水粉质黏土、细砂细颗粒地层难以成孔时的地层加固方案进行研究。通过"地表袖阀管注浆加固地层"和"竖井、平行通道内沿锚索方向深孔注浆加固地层"2种施工方案的现场试验比较,得出"竖井、平行通道内沿锚索方向深孔注浆加固地层"方案优于"地表袖阀管注浆加固地层"方案的结论。
Taking Zhengzhou urban rail transit line 5 for shield tunneling anchor removal construction in the section between Jingsanlu station and Weilailu station as the case study,this paper studies the stratum reinforcement scheme for dealing with the difficulties of water rich clay fine sand particle stratum hardly boring into a hole.It compares the test results of the 2 construction schemes,(a) the grouting consolidation stratum with surface sleeve valve pipe and(b) the deep hole grouting stratum through vertical shaft and parallel channel along anchor direction,while the result shows that the deep hole grouting stratum through vertical shaft and parallel channel along anchor direction is better than the grouting consolidation stratum with surface sleeve valve pipe.
引文
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