爱华隧道施工对云南云县台水管倾斜观测影响分析
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摘要
收集整理云南云县台观测山洞周边环境变化参数及相关岩石力学参数,运用不规则载荷模型模拟计算荷载引起的倾斜变化量。结果显示,爱华隧道施工的挖土卸载变化对台站倾斜量有一定影响,水管倾斜仪NS、EW两方向倾斜影响量分别为147.332 004 5×10-3″和108.560 424 3×10-3″,这与2017年实际观测倾斜量的186×10-3″和150×10-3″在同一量级。研究结果从定量模拟的角度证实了荷载变化对云县台水管倾斜仪NS向北倾、EW向西倾变化和2017年倾斜变化量减小的异常有一定影响。
In this study,the environmental change parameters and related rock mechanics parameters around the observation cave in Yunxian County were collected and sorted,and an irregular load model was used to simulate and calculate the tilt changes caused by the load change.The results show that the unloading change induced by the excavation of Aihua tunnel construction has a certain influence on the observation of DSQ tiltmeter at the Yunxian seismic station.The tiltchanges of NS and EW directions are 147.332 004 5×10-3″and 108.560 424 3×10-3″,respectively,which are of the same order of the actual tilt observed in 2017(186 × 10-3″and 150 ×10-3″,respectively).The results indicate that the load change has a certain influence on the tilt changes in the NS and EW directions as well as on the abnormal decrease of tilt changes in 2017.
In this study,the environmental change parameters and related rock mechanics parameters around the observation cave in Yunxian County were collected and sorted,and an irregular load model was used to simulate and calculate the tilt changes caused by the load change.The results show that the unloading change induced by the excavation of Aihua tunnel construction has a certain influence on the observation of DSQ tiltmeter at the Yunxian seismic station.The tiltchanges of NS and EW directions are 147.332 004 5×10-3″and 108.560 424 3×10-3″,respectively,which are of the same order of the actual tilt observed in 2017(186 × 10-3″and 150 ×10-3″,respectively).The results indicate that the load change has a certain influence on the tilt changes in the NS and EW directions as well as on the abnormal decrease of tilt changes in 2017.
引文
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[3]李祖宁,吴绍祖,陈光,等.利用点荷载叠加方法研究天马跨断层短水准异常资料[J].地震研究,2007,30(1):35-38.
[4]胡卫建,张俊山,谢智,等.荷载对钻孔应变测值影响的实验及力学解析[J].地震,2002,22(3):95-104.
[5]邱泽华,张宝红.用力矩模型解释摩擦试验加载过程中的非线性变化[J].岩石力学与工程学报,2004,23(2):252-255.
[6]闫伟,牛安福,陈国琴.不规则载荷影响地表近场垂向位移和倾斜观测的定量计算[J].中国地震,2015,31(2):297-307.
[7]朱玉新,李玶,任金卫.南定河断裂带断层活动特征与古地震事件[J].中国地震,1994,10(4):347-356.
[8]董兴权,龙建章,文继云,等.云南云县发现古地震遗迹[J].地震研究,1984,7(1):52.
[9]付虹,王世芹,秦嘉政,等.2007年5-6月滇西南地区M≥5成组地震活动中、短临异常特征及预测[J].地震研究,2007,30(4):303-310.
[10]何应文,曹白伦,匡福江,等.滇西南地区地震活动特征分析[J].地震地磁观测与研究,2016,37(5):19-27.
[11]卢双苓,王强,林秀娜,等.汶川地震前泰安台摆式倾斜仪异常现象分析[J].大地测量与地球动力学,2011,31(增刊):19-23.
[12]顾晓鲁.地基与基础[M].第3版.北京:中国建筑工业出版社,2003:157-168.