宜万铁路排水支洞爆破振动对运营隧道影响研究

在不良地质突出的地段进行爆破作业时,爆破振动是影响工程安全的重要因素。文章通过对宜万铁路新增排水支洞爆破施工对相邻运营隧道的振动速度和应变影响进行监测与分析,研究运营隧道振动速度与应变随着排水支洞爆破施工的变化规律,结果表明,运营隧道振动速度与排水支洞爆破单次爆破进尺密切相关,应变则随着爆破次数的增加而小范围波动。

Study on influence of blasting vibration of Yiwan Railway drainage adit in operational tunnel

Blasting vibration is an important factor that affects the safety of the project when blasting operation is carried out in the section with bad geology.Based on the monitoring and analysis of the vibration velocity and strain of the new drainage adit blasting construction of Yiwan railway to the adjacent operational tunnel,this paper studies the change patterns of the vibration velocity and strain of the operation tunnel with the drainage adit blasting construction.The results show that the vibration velocity of the operation tunnel is closely related to the single blasting footage of the drainage adit blasting,while the strain is small in ambient fluctuation with the increase of the blasting times.