地铁盾构下穿既有铁路施工控制技术探讨

Construction control technology of metro shield tunneling under-passing existing railway line

以西安地铁5号线平村站—阿房宫站区间下穿西户铁路工程为背景,通过研究分析盾构下穿过程中地表沉降特点,提出盾构施工中调整土仓压力、掘进速度、注浆参数等技术措施。监测结果表明,采取的控制技术措施可以有效减小地表沉降,保证盾构顺利穿越既有铁路。

Taking the engineering works of Xi＇an metro line 5 Pingcun Village station to Afanggong station section under-passing Xihu railway line as an example, through the analysis of characteristics of ground surface settlement during shield under-passing through construction, this paper puts forward some technical measures to adjust the earth pressure, driving speed, grouting parameters and other methods in shield tunneling. The monitoring results show that the control measures effectively reduces the surface subsidence, ensures the shielding smoothly under-passing the existing railway line.