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| 地应力影响下隧洞边墙的爆破振动安全 | |
| 引用本文： | 朱俊,杨建华,卢文波,陈明,严鹏.地应力影响下隧洞边墙的爆破振动安全[J].爆炸与冲击,2014,34(2):153-160. |
| 作者姓名： | 朱俊 杨建华 卢文波 陈明 严鹏 |
| 作者单位： | 1.中国港湾工程有限责任公司,北京100027 |
| 基金项目： | 国家杰出青年科学基金项目(51125037);国家重点基础研究发展计划(973 计划)项目 (2011CB013501);高等学校博士点基金项目(20110141110026);武汉大学博士研究生学术新人提名奖 项目(T2011206009) |
| 摘 要： | 针对地应力条件下的溪洛渡水电站右岸大跨度导流洞的开挖,依托现场的爆破实验参数,结合LS-DYNA软件,进行了隧洞岩体爆破开挖过程围岩的动态响应计算。分别采用峰值质点振动速度和最大拉应力安全判据确定围岩的爆破损伤范围。计算结果表明,隧洞爆破开挖时,最大峰值质点振速和最大拉应力均出现在洞室边墙中部,因此,爆破损伤在洞室边墙部位最严重。通过对洞室边墙中部的峰值振速和最大拉应力的数值拟合,得到了峰值质点振速和最大拉应力的统计关系,并进行了相关性检验,而且根据所得统计关系,结合实际工程围岩动态抗拉强度准则,提出了控制隧洞围岩爆破损伤的临界峰值质点振动速度。 |
| 关 键 词： | 爆炸力学 临界峰值质点振动速度 LS-DYNA 隧洞边墙 损伤 爆破振动 |
| 收稿时间： | 2012-07-23 |
Influences of blasting vibration on the sidewall of underground tunnel |
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| Institution: | 1.China Harbour Engineering Company Ltd., Beijing100027, China2.State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, Hubei, China3.Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering, School of Water Resources and Hydropower Engineering, Wuhan University, Wuhan 430072, Hubei, China4.CCCC-FHDI Engineering Co., Ltd., Guangzhou 510230, Guangdong, China |
| Abstract: | Abstract:Basedonthefieldtestingoftheblastingvibrationonalarge-spanprojectoftheunderground diversiontunnelinXiluodu,whichlocatesinthesouthwestofChina,withmiddlegeostress,thedynamicresponsesofthesurroundingrockduringtheblastingexcavationwerecalculatedbycombining LS-DYNA.Thepeakparticlevibrationvelocityandthemaximumtensilestresswereusedasthesafetycriterionstoconfirmtherangeofblastingdamage, respectively.Thecalculationresultsindicates thatthepeakparticlevibrationvelocityandthemaximumtensilestressbothappearinthemiddleof thesidewallintheblastingprocess,thereforethemostdangerousareaintheblastingprocessliesin themiddleofthesidewall.Thestatisticalrelationshipbetweenthepeakparticlevibratingvelocityand themaximumtensilestressinthemiddleofthesidewallwasobtainedbythenumericalmatching method,andthecorrelationcoefficientofthepeakparticlevibratingvelocityandthemaximumtensile stresswastested.Accordingtothestatisticalrelationshipbetweenthestressandthevibratingvelocity, thecriticalpeakparticlevibrationvelocitywasputforwardforcontrollingthedamagetoundergroundtunnelrock. |
| Keywords: | mechanicsofexplosion criticalvalueofpeakparticlevibrationvelocity LS-DYNA sidewallofundergroundtunnel damage" target="_blank">damage')" href="#"> damage blastingvibration |
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