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[1]吴波,兰扬斌,吴昱芳,等.爆破荷载作用下隧道中隔岩稳定性研究[J].中国安全生产科学技术,2019,15(10):32-37.[doi:10.11731/j.issn.1673-193x.2019.10.005]
　WU Bo,LAN Yangbin,WU Yufang,et al.Study on stability of intermediate diaphragm rock in tunnel under blasting load[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2019,15(10):32-37.[doi:10.11731/j.issn.1673-193x.2019.10.005]
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爆破荷载作用下隧道中隔岩稳定性研究
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
15
期数:
2019年10期
页码:
32-37
栏目:
学术论著
出版日期:
2019-10-31

文章信息/Info

Title:
Study on stability of intermediate diaphragm rock in tunnel under blasting load
文章编号:
1673-193X(2019)-10-0032-06
作者:
吴波; 兰扬斌; 吴昱芳; 杨仕升; 路明
(1.广西大学 土木建筑工程学院，广西 南宁 530004；
2.广西大学 工程防灾与结构安全教育部重点实验室，广西 南宁 530004)
Author(s):
WU Bo; LAN Yangbin; WU Yufang; YANG Shisheng; LU Ming
(1.College of Civil Engineering and Architecture,Guangxi University,Nanning Guangxi 530004,China;
2.Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education,Guangxi University,Nanning Guangxi 530004,China)
关键词:
中隔岩; 爆破施工; 动力强度折减法; 安全系数
Keywords:
intermediate diaphragm rock;  blasting construction;  dynamic strength reduction method;  safety coefficient
分类号:
X947；U455.6
DOI:
10.11731/j.issn.1673-193x.2019.10.005
文献标志码:
A
摘要:
为研究爆破动力荷载作用下隧道中隔岩稳定性评价标准，以福州地铁2号线为工程背景，结合强度折减动力分析法和数值模拟，同时考虑中隔岩塑性区贯通、位移超过规范值、计算不收敛3种判据，综合对隧道中隔岩进行动力安全系数分析，研究隧道不同净距、不同开挖进尺后行洞隧道爆破开挖对隧道整体安全系数的影响。研究结果表明：中隔岩塑性区贯通时特征点位移和规范中位移限值较为接近，可共同作为评价中隔岩稳定性的最终评价标准；隧道净距越大、进尺越小，隧道整体安全系数越高；对围岩质量较差且净距小于1.6 m的双线隧道进行爆破开挖时，建议将爆破进尺控制在2 m以内。研究结果可为类似工程提供理论参考依据。
Abstract:
In order to study the evaluation criteria for the stability of intermediate diaphragm rock in the tunnel under the effect of blasting dynamic load,taking metro line 2 in Fuzhou as the engineering background,combining with the strength reduction dynamic analysis method and numerical simulation,and considering three criteria of plastic zone penetration,displacement exceeding specification value and nonconvergence of calculation for the intermediate diaphragm rock,the dynamic safety coefficient analysis on the intermediate diaphragm rock of tunnel was carried out comprehensively,and the influence of blasting excavation of following hole tunnel on the overall safety coefficient of tunnel under different net distances and different excavation footages was studied.The results showed that the displacement of characteristic points was close to the limit value of displacement in the specification when the plastic zone of intermediate diaphragm rock penetrated,which could be used as the ultimate criteria for evaluating the stability of intermediate diaphragm rock together.The greater the net distance of tunnel and the smaller the footage,the higher the overall safety coefficient of the tunnel.For the conditions that the quality of surrounding rock was poor and the net distance of tunnel was less than 1.6 m,it was suggested to control the blasting footage within 2 m.The results can provide theoretical reference for the similar projects.

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备注/Memo

备注/Memo:
收稿日期： 2019-09-07
* 基金项目： 国家自然科学基金项目(51678164，51478118)；广西特聘专家专项资金项目(20161103)；广西自然科学基金项目（2018GXNSFDA138009）；广西科技计划项目（AD18126011）
作者简介： 吴波，博士，教授，主要研究方向为隧道及地下工程。
通信作者： 兰扬斌，硕士研究生，主要研究方向为隧道及地下工程。
更新日期/Last Update: 2019-11-05