提高土压平衡盾构掘进效率研究

为了在确保工程质量及施工安全的同时，进一步提高盾构掘进施工效率，获取更大的经济效益，根据土压平衡盾构施工特点，从盾构掘进的施工工序进行综合研究，以石家庄地铁1号线一期工程和平医院站-烈士陵园站区间施工为例，确定了影响盾构掘进效率的主要因素，并对掘进影响因素进行分析总结。得出了： 1)盾构掘进时间、管片拼装时间工序较为单一，主要和地质情况和作业人员熟练程度有关； 2)管片吊运下井时间、渣土吊运出井时间、其他外部原因对现场施工的影响等会受施工场地布置影响，在盾构施工前应进行合理的施工场地布置； 3)对盾构、后配套设备维修保养及易损件更换时间、盾构施工测量及移站影响时间的优化，能进一步提升施工效率。

How to Improve the Efficiency of EPB Shield Tunneling

In the paper, the main factors that influence the tunneling efficiency of EPB shield are summarized, with the shield tunneling of the running tunnel from Heping Hospital station to Lieshilingyuan station on Line 1 of Shijiazhuang Metro as example. Conclusions drawn are as follows: 1) Shield boring and segment erection are relatively simple tunneling processes, which are related to the geological conditions and the proficiency of the operation labors; 2) The supply of the segments from the ground surface to the bottom of the vertical shaft and the hoisting of the mucks from the shaft bottom to the ground surface are related to the layout of the facilities at the job site, therefore, the facilities at the job site should be well planned before shield boring is started; 3) The optimization of the repair and maintenance of shields and their backup equipment, the replacement of the vulnerable parts, the shield tunneling survey and the moving of the survey stations can further improve the tunneling efficiency.