小净距隧道爆破开挖中夹岩累积损伤计算方法及其应用
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摘要
为了获得小净距隧道中夹岩爆破累积损伤规律,建立了爆破荷载作用下中夹岩累积损伤新计算方法,并应用该方法对大坪山隧道中夹岩爆破施工过程中的累积损伤进行预测,同时进行了现场测试验证。结果表明,新计算方法不仅能反映爆破力学作用过程,而且计算参数也易于获取;预测结果与实测平均误差在12%左右,可以用来预测岩石的累积损伤;大坪山隧道中夹岩累积损伤规律为二次爆破后6个测孔波速平均降低率为4.3%;各测孔最大累积损伤增量为6.1%。其结果可为小净距隧道中夹岩稳定性研究提供依据。
A new calculation method has been established in order to obtain the clip rock of small-distance tunnels blasting cumulative damage rule.The new method is applied to predict Dapingshan tunnel clip rock blasting cumulative damage during construction;at the same time a field test validation is carried out.The results show that: the new method can not only reflect the blasting of mechanical action process,and the calculated parameters are also easy to obtain;the prediction and measured average error is about 12%,which can be used to predict rock cumulative damage;Dapingshan tunnel clip rock cumulative damage rule is as follows: after the second blasting,6 test holes velocity average drop rate is 4.3%;the largest test holes cumulated damage in increments is 6.1%.The results provide a basis for further small-distance tunnels clip rock stability studies.
A new calculation method has been established in order to obtain the clip rock of small-distance tunnels blasting cumulative damage rule.The new method is applied to predict Dapingshan tunnel clip rock blasting cumulative damage during construction;at the same time a field test validation is carried out.The results show that: the new method can not only reflect the blasting of mechanical action process,and the calculated parameters are also easy to obtain;the prediction and measured average error is about 12%,which can be used to predict rock cumulative damage;Dapingshan tunnel clip rock cumulative damage rule is as follows: after the second blasting,6 test holes velocity average drop rate is 4.3%;the largest test holes cumulated damage in increments is 6.1%.The results provide a basis for further small-distance tunnels clip rock stability studies.
引文
[1]贾善坡,陈卫忠,于洪丹,等.泥岩隧道施工过程中渗流场与应力场全耦合损伤模型研究[J].岩土力学,2009,30(1):19-26.JIA Shan-po,CHEN Wei-zhong,YU Hong-dan,et al.Research on seepage-stress coupling damage model of Boom clay during tunneling[J].Rock and Soil Mechanics,2009,30(1):19-26.
[2]闫长斌.爆破作用下岩体累积损伤效应及其稳定性研究[[博士学位论文D].长沙:中南大学,2006.
[3]朱传云,喻胜春.爆破引起岩体损伤的判别方法研究[J].工程爆破,2001,7(1):12-16.ZHU Chuan-yun,YU Sheng-chun.Study on the criterion of rockmass damage caused by blasting[J].Engineering Blasting,2001,7(1):12-16.
[4]闰长斌,徐国元,杨飞.爆破动荷载作用下围岩累积损伤效应声波测试研究[J].岩土工程学报,2007,1(29):88-93.YAN Chang-bin,XU Guo-yuan,YANG Fei.Measure-ment of sound waves to study cumulative damage effect on surrounding rock under blasting load[J].Chinese Journal of Geotechnical Engineering,2007,1(29):88-93.
[5]李树春,许江,陶云奇,等.岩石低周疲劳损伤模型与损伤变量表达方法[J].岩土力学,2009,30(6):1611-1614.LI Shu-chun,XU Jiang,TAO Yun-qi,et al.Low cycle fatigue damage model and damage variable expression of rock[J].Rock and Soil Mechanics,2009,30(6):1611-1614.
[6]阳生权.爆破地震累积效应理论和应用初步研究[博士学位论文D].长沙:中南大学,2002.
[7]阳生权,吕中玉,刘宝琛.隧道围岩爆破地震累积效应研究[J].地下空间与工程学报,2007,3(8):1451-1454.YANG Sheng-quan,LüZhong-yu,LIU Bao-chen.Study on blasting seismic cumulative effects of road tunnel and its surrounding rocks[J].Chinese Journal of Under-ground Space and Engineering,2007,3(8):1451-1454.
[8]林大能.平巷掏槽爆破空孔尺寸效应及围岩频繁震动损伤累积特性研究[博士学位论文D].长沙:中南大学,2006.
[9]戴俊.岩石动力学特性与爆破理论[M].北京:冶金工业出版社,2002.
[10]张志呈.定向断裂控制爆破[M].重庆:重庆出版,1997.
[11]支国华.岩体的节理裂隙及断层对爆破地震波传播的影响的动力分析[博士学位论文D].上海:同济大学,1994.
[12]徐筠.开挖应力状态下隧道围岩损伤演化及渐进破坏规律研究[博士学位论文[D].重庆:重庆交通大学,2008:30-31.
[13]叶明亮,续建科,牟宏,等.岩石抗拉强度试验方法的探讨[J].贵州工业大学学报(自然科学版),2001,30(6):19-25.YE Ming-liang,XU Jian-ke,MOU Hong.Test method of tensile strength of rock investigate[J].Guizhou University of Technology(Natural Science),2001,30(6):19-25.
[14]刘斌,席道瑛,葛宁洁.不同围压下岩石中泊松比的各向异性[J].地球物理学报,2002,45(6):880-889.LIU Bin,XI Dao-ying,GE Ning-jie.Anisotropy of Poisson’s ratio in rock samples under confining pressures[J].Chinese Journal of Geophysics,2002,45(6):880-889.
[2]闫长斌.爆破作用下岩体累积损伤效应及其稳定性研究[[博士学位论文D].长沙:中南大学,2006.
[3]朱传云,喻胜春.爆破引起岩体损伤的判别方法研究[J].工程爆破,2001,7(1):12-16.ZHU Chuan-yun,YU Sheng-chun.Study on the criterion of rockmass damage caused by blasting[J].Engineering Blasting,2001,7(1):12-16.
[4]闰长斌,徐国元,杨飞.爆破动荷载作用下围岩累积损伤效应声波测试研究[J].岩土工程学报,2007,1(29):88-93.YAN Chang-bin,XU Guo-yuan,YANG Fei.Measure-ment of sound waves to study cumulative damage effect on surrounding rock under blasting load[J].Chinese Journal of Geotechnical Engineering,2007,1(29):88-93.
[5]李树春,许江,陶云奇,等.岩石低周疲劳损伤模型与损伤变量表达方法[J].岩土力学,2009,30(6):1611-1614.LI Shu-chun,XU Jiang,TAO Yun-qi,et al.Low cycle fatigue damage model and damage variable expression of rock[J].Rock and Soil Mechanics,2009,30(6):1611-1614.
[6]阳生权.爆破地震累积效应理论和应用初步研究[博士学位论文D].长沙:中南大学,2002.
[7]阳生权,吕中玉,刘宝琛.隧道围岩爆破地震累积效应研究[J].地下空间与工程学报,2007,3(8):1451-1454.YANG Sheng-quan,LüZhong-yu,LIU Bao-chen.Study on blasting seismic cumulative effects of road tunnel and its surrounding rocks[J].Chinese Journal of Under-ground Space and Engineering,2007,3(8):1451-1454.
[8]林大能.平巷掏槽爆破空孔尺寸效应及围岩频繁震动损伤累积特性研究[博士学位论文D].长沙:中南大学,2006.
[9]戴俊.岩石动力学特性与爆破理论[M].北京:冶金工业出版社,2002.
[10]张志呈.定向断裂控制爆破[M].重庆:重庆出版,1997.
[11]支国华.岩体的节理裂隙及断层对爆破地震波传播的影响的动力分析[博士学位论文D].上海:同济大学,1994.
[12]徐筠.开挖应力状态下隧道围岩损伤演化及渐进破坏规律研究[博士学位论文[D].重庆:重庆交通大学,2008:30-31.
[13]叶明亮,续建科,牟宏,等.岩石抗拉强度试验方法的探讨[J].贵州工业大学学报(自然科学版),2001,30(6):19-25.YE Ming-liang,XU Jian-ke,MOU Hong.Test method of tensile strength of rock investigate[J].Guizhou University of Technology(Natural Science),2001,30(6):19-25.
[14]刘斌,席道瑛,葛宁洁.不同围压下岩石中泊松比的各向异性[J].地球物理学报,2002,45(6):880-889.LIU Bin,XI Dao-ying,GE Ning-jie.Anisotropy of Poisson’s ratio in rock samples under confining pressures[J].Chinese Journal of Geophysics,2002,45(6):880-889.
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