砂卵石地层盾构施工诱发振动环境影响试验研究

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振动与冲击 ›› 2015, Vol. 34 ›› Issue (16) : 213-218.

论文

陶连金1，郭飞1，黄俊2，李积栋1，安军海1

作者信息 +

Field-test for environment vibration induced by shield tunneling in sand gravel layer

TAO Lian-jin1，GUO Fei1，HUANG Jun2，LI Ji-dong1，AN Jun-hai1

Author information +

文章历史 +

摘要

针对北京西部地区砂卵石地层埋深浅、粒径大、分布广，盾构施工产生的振动易传至地表对环境产生影响等，对北京地铁某区间进行现场振动测试。通过埋设地层、地面及隧道内测点进行时间-空间同步监测，获取测试区间盾构每环掘进时的振动数据，分析振动频域特性及空间衰减规律，并对地表振动环境影响进行评价。研究表明，砂卵石地层盾构施工振动主要为刀盘刀具切割土体产生的振动，机械振动及运输车辆产生的振动对地表影响较小。刀盘附近振动主频分布于30 Hz以上，而横断面地表远离刀盘40 m处衰减至20 Hz以下。测点振幅大小与刀盘、测点间相对位置有关，地表振幅大小依次为刀盘前方测点、刀盘两侧测点、刀盘后方测点，刀盘处地表振级达80 dB，远离刀盘20～30 m时衰减至60 dB以下。

Abstract

The sand gravel layer in Beijing western region are of characteristics of shallow burial depth and large particle size. Environment vibration influence induced by shield construction in sand gravel layer is great. Field tests of acceleration vibrations were carried out in an interval tunnel of Beijing. Vibration data in construction process had been simultaneously collected by buried strata points, ground points and measuring points in tunnel. Vibration frequency domain characteristics and spatial attenuation law were drawn. Environmental influence assessment was conducted. It is shown that the vibration is mainly due to collision with cutter tool and gravel particles. Vibration caused by machines and transport vehicle have little effect on ground environment. Main frequency of vibration near cutter head is mainly distributed in more than 30 Hz. The main frequency of measuring point away from cutter head about 40 m on the surface cross-section has decayed to below 20 Hz. Amplitude of measuring points are related with relative position between cutter head and measuring points, which are in order as followed: points ahead of the cutter head, points on both sides of the cutter head, points behind the cutter head. Vibration level in vertical near the cutter head on ground is about 80 dB, it has decayed to 60 dB away from cutter head between 20 m to 30 m.

导出引用

陶连金1，郭飞1，黄俊2，李积栋1，安军海1. 砂卵石地层盾构施工诱发振动环境影响试验研究[J]. 振动与冲击, 2015, 34(16): 213-218

TAO Lian-jin1，GUO Fei1，HUANG Jun2，LI Ji-dong1，AN Jun-hai1. Field-test for environment vibration induced by shield tunneling in sand gravel layer[J]. Journal of Vibration and Shock, 2015, 34(16): 213-218

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