›› 2018, Vol. 39 ›› Issue (9): 3377-3384.doi: 10.16285/j.rsm.2016.2820

• 岩土工程研究 • 上一篇    下一篇

兰州砂卵石地层盾构施工振动传播及衰减特性分析

郭 飞1, 2,陶连金1,孔 恒2,马红红1,张丽丽2,张新全2   

  1. 1. 北京工业大学 城市与工程安全减灾教育部重点试验室,北京 100124;2. 北京市政建设集团有限责任公司,北京 100048
  • 收稿日期:2016-12-04 出版日期:2018-09-11 发布日期:2018-10-08
  • 作者简介:郭飞,男,1988年生,博士,主要从事轨道交通环境振动方面的研究。
  • 基金资助:

    国家自然科学基金(No.41572276)

Analysis of propagation and attenuation of vibration induced by shield tunneling in Lanzhou sandy gravel layer

GUO Fei1, 2, TAO Lian-jin1, KONG Heng2, MA Hong-hong1, ZHANG Li-li2, ZHANG Xin-quan2   

  1. 1. The Key Laboratory of Urban Security and Disaster Engineering, Ministry of Education, Beijing University of Technology, Beijing 100124, China; 2. Beijing Municipal Construction Co., Ltd., Beijing 100048, China
  • Received:2016-12-04 Online:2018-09-11 Published:2018-10-08
  • Supported by:

    This work was supported by the National Natural Science Foundation of China(41572276).

摘要: 盾构施工诱发周边地表振动已成为突出的环境振动问题。依托兰州某砂卵石地层盾构施工标段,通过隧道-地表同步采集三向振动加速度,研究盾构施工诱发振动在地表50 m×50 m范围内的时域、频域传播规律。结果表明:①地表自由场地加速度随距离的传播呈现先放大后急剧衰减的趋势。X向会出现局部放大反复的现象。②横断面最大峰值为0.33 m/s2,但盾构施工诱发振动将对敏感的古建筑产生不利影响。③50 m范围内地表频率主要以4~80 Hz为主,各频段振动级并非随振源距离的增加单调衰减,与场地土层卓越频率接近的频段存在较大的反弹现象。④在盾构诱发环境振动的评价中应考虑三向振动的影响。

关键词: 盾构施工, 环境振动, 现场试验, 衰减规律

Abstract: Ground vibration induced by shield construction has become a major environmental vibration problem in urban areas. Based on a sandy pebble formation of a shield construction in Lanzhou, by synchronizing the test tunnel and three-direction vibration acceleration on the surface of the earth, this paper studies the shield construction-induced vibration in the time domain, and frequency domain propagation law within the surface of the 50 m×50 m area. The findings of this study are as follows: 1) the spread of the surface free field acceleration with the distance firstly increases and then sharply attenuates. In X direction, the amplification phenomenon repeatedly appears; 2) the transverse maximum peak of 0.33 m/s2 is harmful to sensitive ancient buildings; 3) within the scope of 50 meters, the surface frequency mainly ranges from 4 to 80 Hz, the vibration spectrum magnitude does not monotonously decrease with the increase of the vibration source distance, but has rebounding phenomenon, which is associated with excellent frequency field soil; 4) the influence of three directions of vibration should be considered in the evaluation of shield induced environmental vibration.

Key words: shield construction, environmental vibration, field-test, attenuation law

中图分类号: 

  • U 455

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