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[1]徐烁,李庚许,王立川,等.近接隧道开挖卸荷与爆破振动的叠加效应研究*[J].中国安全生产科学技术,2023,19(9):96-102.[doi:10.11731/j.issn.1673-193x.2023.09.014]
　XU Shuo,LI Gengxu,WANG Lichuan,et al.Study on superimposed effect of excavation unloading and blasting vibration of adjacent tunnels[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2023,19(9):96-102.[doi:10.11731/j.issn.1673-193x.2023.09.014]
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近接隧道开挖卸荷与爆破振动的叠加效应研究*
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
19
期数:
2023年9期
页码:
96-102
栏目:
职业安全卫生管理与技术
出版日期:
2023-09-30

文章信息/Info

Title:
Study on superimposed effect of excavation unloading and blasting vibration of adjacent tunnels
文章编号:
1673-193X(2023)-09-0096-07
作者:
徐烁; 李庚许; 王立川; 张俊儒; 张学民; 李庆斌
(1.中南大学 土木工程学院，湖南 长沙 410075；
2.中铁十八局集团有限公司，天津 300222；3.西南交通大学 土木工程学院，四川 成都 610031；
4.中南大学 重载铁路工程结构教育部重点实验室，湖南 长沙 410075)
Author(s):
XU Shuo;  LI Gengxu;  WANG Lichuan;  ZHANG Junru;  ZHANG Xuemin;  LI Qingbin
(1.School of Civil Engineering,Central South University,Changsha Hunan 410075,China;
2.China Railway 18th Bureau Group Co.,Ltd.,Tianjin 300222 China;
3.School of Civil Engineering,Southwest Jiaotong University,Chengdu Sichuan 610031,China;
4.Key Laboratory of Heavy-haul Railway Engineering Structure,Ministry of Education,Central South University,Changsha Hunan 410075,China)
关键词:
近接隧道; 爆破振动; 应力重分布; 弹性波动理论; 应力叠加
Keywords:
adjacent tunnel;  blasting vibration;  stress redistribution;  elastic wave theory;  stress superposition
分类号:
X947
DOI:
10.11731/j.issn.1673-193x.2023.09.014
文献标志码:
A
摘要:
为研究近接新建隧道开挖卸荷和爆破应力波振动的叠加作用对既有隧道结构的影响，结合现场试验和数值模拟手段，研究0.05 B~1.0 B先行隧道衬砌的力学响应、围岩塑性区分布，并分析后行隧道开挖不同应力释比的影响。研究结果表明：受爆破P波作用，衬砌拉应力峰值与振速峰值呈线性正比关系；围岩级别差、净距较小时，开挖卸荷与爆破振动作用叠加，衬砌拉应力大于弹性波动理论计算值；应力释放率的增加会加剧爆破应力波的动力作用；基于上述分析，提出Ⅳ、Ⅴ级围岩下2种作用的叠加影响区范围，针对小于0.25 B的近接隧道施工，应加强支护措施以防护叠加作用对隧道结构安全的影响。
Abstract:
In order to study the influence of the superimposed effect of excavation unloading and blasting stress wave vibration on the existing tunnel structure during the adjacent new tunnel construction,combined with the field test and numerical simulation,the mechanical response and plastic zone distribution of surrounding rock of the 0.05 B~1.0 B first tunnel lining were studied,and the influence of different stress release ratios of the latter tunnel excavation was analyzed.The results show that under the action of blasting P-wave,the peak tensile stress of the lining is linearly proportional to the peak vibration velocity.When the surrounding rock level difference and clear distance are small,the excavation unloading and blasting vibration are superimposed,and the tensile stress of lining is greater than the calculated value of elastic wave theory.The increase of stress relief rate will exacerbate the dynamic effect of blasting stress wave.Based on the above analysis,the scope of the superimposed influence zone of the two effects under Class Ⅳ and Ⅴ surrounding rock is proposed.For the adjacent tunnels construction less than 0.25 B,the support measures should be strengthened to protect the impact of the superimposed effect on the structural safety of tunnel.

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备注/Memo

备注/Memo:
收稿日期： 2023-04-10
* 基金项目： 中铁十八局集团有限公司联合科技研究开发计划课题(G21-14)；国家自然科学基金项目(51978671)
作者简介： 徐烁，硕士研究生，主要研究方向为隧道及地下工程的建设技术。
通信作者： 王立川，博士，正高级工程师，主要研究方向为隧道及地下工程的建设技术、科研及其管理、教学。
更新日期/Last Update: 2023-10-12