软土地层盾构掘进对精密仪器厂房振动影响的实测研究  

Effect of Shield Tunneling on Soft Soil to Vibration Sensitive Equipment Factory

作　　者：刘加华[1] 蒋通[2] 

机构地区：[1]上海申通地铁集团有限公司技术中心,上海∥高级工程师201103 [2]同济大学结构工程与防灾研究所,上海200092

出　　处：《城市轨道交通研究》2014年第3期102-107,共6页Urban Mass Transit

摘　　要：在软土地层条件下单圆盾构的掘进施工中,对不同距离的地面振动速度进行了实测研究。研究表明:盾构推进时振动速度随着距离增大而迅速衰减;在距离施工线路162m的精密仪器厂房附近场地上的竖向振动速度1/3倍频程平均值满足VC-D标准,但其最大值略大于VC-D标准,而水平速度满足VC-D标准;距施工线路85m以外场地上三个方向速度值均满足VC-D标准要求;盾构掘进参数对距施工线路60m以外场地环境振动的影响不大;地面车辆特别是重型卡车通过时所引起的环境振动远大于盾构掘进引起的振动,并远超过VC-D标准。The on-site measurement of environment vibration caused by shield tunneling on the soft soil in different distances is studied.The measurement shows that attenuation of vibration velocity changes very rapidly with the increase of distance.The RMS （root mean square） velocity in 1/3 octave bands of frequency is a little larger than VC-D in the vertical direction when the test site is 162 m away from the shield,other two orthogonal horizontal directions meet the requirement; while the vibration is 85 m away,all the three directions could meet the requirement of VC-D.The boring parameter 60 m away has little effect on the vibration velocity,but the heavy lorries excite larger vibration disturbance compared with the shield tunneling which far exceeds the criteria of VC-D at the same site.

关 键 词：软土地层 盾构掘进 振动影响 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]