[1]喻军,刘松玉,童立元.浅埋隧道爆破振动空洞效应[J].东南大学学报(自然科学版),2010,40(1):176-179.[doi:10.3969/j.issn.1001-0505.2010.01.033]
 Yu Jun,Liu Songyu,Tong Liyuan.Hollow effect induced by blasting vibration in shallow tunnels[J].Journal of Southeast University (Natural Science Edition),2010,40(1):176-179.[doi:10.3969/j.issn.1001-0505.2010.01.033]
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浅埋隧道爆破振动空洞效应()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
40
期数:
2010年第1期
页码:
176-179
栏目:
交通运输工程
出版日期:
2010-01-20

文章信息/Info

Title:
Hollow effect induced by blasting vibration in shallow tunnels
作者:
喻军 刘松玉 童立元
东南大学交通学院, 南京 210096
Author(s):
Yu Jun Liu Songyu Tong Liyuan
School of Transportation, Southeast University, Nanjing 210096, China
关键词:
浅埋隧道 空洞效应 爆破 振动速度 振动效应判据 衰减规律
Keywords:
shallow tunnel hollow effect blasting vibration velocity criterion of vibration effect attenuation law
分类号:
U456.3
DOI:
10.3969/j.issn.1001-0505.2010.01.033
摘要:
为了防止浅埋隧道爆破振动对其上方建筑物的损坏,对爆破引起地表振动机理进行了研究.某隧道进口浅埋段沿隧道纵向用爆破振动仪器对振动速度进行了跟踪监测,发现存在空洞效应,即无论在掌子面前方还是后方,离掌子面10 m处,地表振动速度最大,并向两侧衰减,且成洞区地表振动速度是对称于掌子面的非成洞区振动速度的1.3倍,随着距离增加振动速度减小; 采用数值模拟方法进行研究,发现类似结论.在浅埋隧道爆破施工中,成洞区地表的振动速度具有放大作用,是非成洞区的1.2~1.5倍.如果在浅埋隧道实施爆破防振措施时没有考虑到空洞效应,会导致振动效应判据和安全距离失误,引起工程事故.
Abstract:
In order to prevent damage of building induced by blasting vibration in shallow tunnel, the surface vibration mechanism from blasting vibration is studied. Ground velocity was monitored along tunnel longitudinal direction of the entrance of some tunnel by using blasting vibration instrument. The result shows that whether in front of the face of tunnel or at the back of the face of tunnel along tunnel longitudinal direction the vibration velocity at 10 m from the face is the biggest and vibration velocity of cavity zone is 1.3 times of that of non-cavity zone symmetrical about the face, and then the velocity decreases with the distance increasing. This is hollow effect. The conclusion was proved with numerical simulation. During the construction of shallow tunnels, ground vibration velocity of cavity zone is amplified, being 1.2-1.5 times of that of non-cavity zone. If hollow effect induced by blasting vibration in shallow tunnel is not taken into account, errors in criterion of vibration effect and safety distance would occur, which may cause engineering accidents.

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备注/Memo

备注/Memo:
作者简介: 喻军(1978—),男,博士生; 刘松玉(联系人),男,博士,教授,博士生导师,liusy@seu.edu.cn.
引文格式: 喻军,刘松玉,童立元.浅埋隧道爆破振动空洞效应[J].东南大学学报:自然科学版,2010,40(1):176-179. [doi:10.3969/j.issn.1001-0505.2010.01.033]
更新日期/Last Update: 2010-01-20