地铁盾构线路穿越运营隧道的沉降影响

发布时间：2018-06-01 01:24

本文选题：盾构穿越 + 测量机器人　；参考：《测绘科学》2017年02期

【摘要】：针对地铁修建过程中穿越运营地铁线路时需动态监测隧道的安全状态问题,该文以深圳地铁某区间盾构隧道穿越过程为例,利用测量机器人,以0.5~2h/次的频率对监测点进行全程观测。断面数据分析表明:在下穿过程中,上下隧道间距在1.823和6.028m之间存在某个临界距离,当小于这个临界值时,穿越时要注意隆起对既有隧道,尤其是对道床轨面沉降差的影响;盾构机从进到出1号线左、右线隧道引起的沉降量各占相应穿越线路总沉降量的50%~86%,盾构穿越已有隧道的过程应增大观测频率,及时进行二次注浆;总的监测断面布设数量不受上下隧道间距的影响,距离上、下隧道正交断面10m外的相邻断面只需布设两个观察点。从而实现最优点位布设密度和监测频率,节约施工成本。
[Abstract]:In view of the need to dynamically monitor the safety state of the tunnel during the subway construction process, this paper takes a section of the shield tunnel in Shenzhen Metro as an example to use the measuring robot. The monitoring points were observed at the frequency of 0.5~2h/ times. The analysis of cross-section data shows that there is a critical distance between 1.823 and 6.028m between the upper and lower tunnels during the process of underpass. When the distance is less than this critical value, attention should be paid to the influence of the uplift on the settlement difference of the existing tunnel, especially on the track surface of the track bed. The settlement caused by shield machine from the left to the right of line 1 and the right line each account for 50 / 86 of the total settlement of the corresponding crossing line. The observation frequency should be increased and the second grouting should be carried out in time in the process of shield tunneling through the existing tunnel. The total number of monitoring sections is not affected by the distance between the upper and lower tunnels. In the distance, only two observation points are required for the adjacent sections 10 m away from the orthogonal section of the lower tunnel. Thus the optimal location density and monitoring frequency are realized, and the construction cost is saved.
【作者单位】：湖南科技大学煤炭资源清洁利用与矿山环境保护湖南省重点实验室;湖南科技大学建筑与城乡规划学院;中国建筑第五工程局有限公司;
【基金】：湖南省教育厅科学研究项目(13C313) 湖南省科技厅科技计划项目(2014FJ3104) 国家自然科学基金项目(41474014) 湖南科技大学煤炭资源清洁利用与矿山环境保护湖南省重点实验室开放基金项目(E21505)
【分类号】：U231.3;U456.3

【相似文献】