考虑自由面参数影响的地铁隧道爆破振速预测公式优化研究

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (21) : 245-253.

论文

闵鹏1,2，谢俊3，申玉生1，常铭宇1，董俊3，陈孔福1

作者信息 +

Optimization of prediction formula for blasting vibration velocity of subway tunnels considering effects of free surface parameters

MIN Peng1,2, XIE Jun3, SHEN Yusheng1, CHANG Mingyu1, DONG Jun3, CHEN Kongfu1

Author information +

文章历史 +

摘要

预测地铁隧道爆破施工产生的振动速度，大多采用萨道夫斯基公式进行计算，很难反映岩体爆破中自由面的影响。然而，在隧道爆破过程中，岩石的自由面面积及自由面数量都会影响爆破地震波的传播，导致振速发生变化。为进一步研究自由面对爆破振速的影响，在萨道夫斯基公式的基础上，引入自由表面积Sr、自由面数量系数k和自由表面指数β来表征自由面对爆破振速的影响，并采用统计学t分布进行优化，建立隧道爆破地表振速改进预测公式。以重庆地铁18号线富歇区间隧道工程为依托，开展爆破振动测试，将改进公式与原公式对实测振速的拟合结果对比分析，验证了改进公式的正确性。通过数值模拟建立了三种自由面参数不同工况下的隧道爆破模型，根据改进公式预测结果的各项误差评价指标，可知和方差SSE由3.19×10-5下降为1.29×10-5，均方根误差RMSE由1.56×10-3下降为9.96×10-4，决定系数R-square由0.887上升为0.956，调整决定系数Adjusted R-square由0.882上升为0.954，证明了改进公式具有更高的预测精度。研究成果可为类似隧道爆破工程提供一定的理论依据。

Abstract

Most of the vibration velocity of subway tunnel blasting was calculated by the Sadovski formula, which is difficult to reflect the influence of free surface in rock blasting. However, in the process of tunnel blasting, both the free surface area and the number of free surface of rock affected the propagation of blasting seismic wave, resulting in the change of vibration velocity. In order to further study the influence of free face on blasting vibration velocity, free surface area Sr, free surface area coefficient k and free surface index β were introduced to represent the influence of free face on blasting vibration velocity on the basis of Sadovski formula, and the formula was optimized by t distribution. An improved prediction formula of tunnel blasting vibration velocity was established. Based on the Fuxie tunnel project of Chongqing Metro Line 18, the blasting vibration test was carried out, and the fitting results of the modified formula and the original formula to the measured vibration velocity were compared and analyzed to verify the correctness of the improved formula. Three tunnel blasting models are established by numerical simulation under different conditions of free surface parameters. According to the error evaluation indexes predicted by the improved formula, SSE decreases from 3.19×10-5 to 1.29×10-5, RMSE decreases from 1.56×10-3 to 9.96×10-4, R-Square increases from 0.887 to 0.956, Adjusted R-Square increases from 0.882 to 0.954, which proves that the improved formula has higher prediction accuracy. The research results can provide some theoretical basis for similar tunnel blasting projects.

导出引用

闵鹏1,2，谢俊3，申玉生1，常铭宇1，董俊3，陈孔福1. 考虑自由面参数影响的地铁隧道爆破振速预测公式优化研究[J]. 振动与冲击, 2023, 42(21): 245-253

MIN Peng1,2, XIE Jun3, SHEN Yusheng1, CHANG Mingyu1, DONG Jun3, CHEN Kongfu1. Optimization of prediction formula for blasting vibration velocity of subway tunnels considering effects of free surface parameters[J]. Journal of Vibration and Shock, 2023, 42(21): 245-253

参考文献

[1] 程光华, 王睿, 赵牧华, 等. 国内城市地下空间开发利用现状与发展趋势[J]. 地学前缘, 2019,26(03):39-47.
CHENG Guanghua, WANG Rui, ZHAO Muhua, et al. Present situation and developmental trend of urban underground space development and utilization in China. Earth Science Frontiers[J]. Earth Science Frontiers, 2019, 26(3): 039-047.
[2] 闫鸿浩, 王小红. 城市浅埋隧道爆破原理及设计[M]. 北京: 中国建筑工业出版社, 2013.
YAN Honghao, WANG Xiaohong. Blasting principle and
design of shallow-buried tunnel in urban area[M]. Beijing: China Architecture & Building Press, 2013.
[3] 胡国忠, 王宏图, 刘菊梅, 等. 构筑物拆除爆破的安全分析及防护方法[J]. 爆破器材, 2005(04): 30-33.
HU Guozhong, WANG Hongtu, LIU Jumei, et al. A Safety Analysis and Defending Method of Demolition Blasting of Building[J]. Explosive Materials, 2005(04): 30-33.
[4] 逄铁铮. 大断面城市隧道穿越复杂建筑物群的安全性控制研究[D]. 北京交通大学, 2015.
PANG Tiezheng. Security control for large section of urban tunnel through a complex group of buildings[D]. Beijing: Beijing Jiaotong University, 2015.
[5] DEVINE J F. Effect of charge weight on vibration levels from quarry blasting[M]. US: Bureau of Mines, 1966.
[6] LOPEZ Jimeno Carlos, LOPEZ Jimeno Emilio, JAVIER Ayala Carcedo Francisco, et al. Drilling and blasting of rock[M]. London: Routledge, 1995.
[7] 汪旭光, 于亚伦, 刘殿中. 爆破安全规程实施手册[M]. 北京: 人民交通出版社，2004.
WANG Xuguang, YU Yalun, LIU Dianzhong. Manual of safety regulations for blasting[M]. Beijing: China Communications Press, 2004.
[8] 国家安全生产监督管理总局. 爆破安全规程: GB 6722-2014[S]. 北京: 中国标准出版社, 2015.
State Administration of Work Safety. Safety regulations for blasting: GB6722-2014[S]. Beijing: China Standards Press, 2015.
[9] 毕卫国, 石崇. 爆破振动速度衰减公式的优化选择[J]. 岩土力学, 2004(S1): 99-102.
BI Weiguo, SHI Chong. Optimal selection of velocity attenuation formula for blasting vibration[J]. Geotechnical Mechanics, 2004, 25 (Supp.1): 99-102.
[10] 陈寿如, 宋光明, 周胜利, 等. 近河堤采矿爆破的震动监测与控制[J]. 中国有色金属学报, 2000(01): 136-139.
CHEN Shouru, SONG Guangming, ZHOU Shengli, et al. Controlling blasting ground vibration near bank[J]. The Chinese Journal of Nonferrous Metals, 2000, 10(1): 136-139.
[11] 傅洪贤, 赵勇, 谢晋水, 等. 隧道爆破近区爆破振动测试研究[J]. 岩石力学与工程学报, 2011, 30(02): 335-340.
FU Hongxian, ZHAO Yong, XIE Jinshui, et al. Study of blasting vibration test of area near tunnel blasting source[J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 30(2): 335-340.
[12] 焦永斌. 爆破地震安全评定标准初探[J]. 爆破, 1995(03): 45-47.
JIAO Yongbin. Discussion on the security evaluation criteria under blast-induced vibration[J]. Blasting, 1995, 12(3): 45-47.
[13] 杨珊, 陈建宏, 郭宏斌, 等. 基于回归分析的隧道爆破振动传播规律研究[J]. 中国安全科学学报, 2011, 21(10): 71-75.
YANG Shan, CHEN Jianhong, GUO Hongbin, et al. Application of Regressive Analysis in the Research on Propagation Law of Tunnel Blasting Vibration[J]. China Safety Science Journal, 2011, 21(10): 71-75.
[14] 卢文波, Hustrulid W. 质点峰值振动速度衰减公式的改进[J]. 工程爆破, 2002, 8(03): 1-4.
LU Wenbo, HUSTRULID W. An improvement to the equation for the attenuation of the peak particle velocity[J]. Engineering Blasting, 2002, 8(03): 1-4.
[15] 宋全杰, 李海波, 李俊如, 等. 层理对爆破振动传播规律的影响[J]. 岩石力学与工程学报, 2012, 31(10): 2103-2108.
SONG Quanjie, LI Haibo, LI Junru, et al. Effect of bedding on blasting vibration propagation[J]. Journal of Rock Mechanics and Engineering, 2012, 31(10): 2103-2108.
[16] 陈星明, 肖正学, 蒲传金. 自由面对爆破地震强度影响的试验研究[J]. 爆破, 2009, 26(04): 38-40+56.
CHEN Xingming, XIAO Zhengxue, PU Chuanjin. Experimental study on influence blasting earthquake strength to free faces[J]. Blasting, 2009, 26(04): 38-40+56.
[17] 张建平. 自由面数量对爆破振动规律影响实验研究[J].现代矿业, 2009, 25(07): 46-48.
ZHANG Jianping. Experimental research on effects of free surface quantity on blasting vibration laws[J]. Modern Mining, 2009, 25(07): 46-48.
[18] 梁雪松. 自由面对爆破振动的影响研究[D]. 东北大学, 2013.
LIANG Xuesong. The effects of free surface on blast vibration[D]. Northeastern University, 2013.
[19] 许海亮, 张继春, 郭建群. 钻孔爆破中质点振动速度的预测公式探讨[J]. 爆破, 2003(03): 75-78.
XU Hailiang, ZHANG Jichun, GUO Jianqun. Investigation on formula of Predicting the particle vibration velocity in drilling blasting[J]. Blasting, 2003(03): 75-78.
[20] HSIN Y L, HONG Hao. Reliability analysis of reinforced concrete slabs under explosive loading [J]. Structural Safety, 2001, 23(02): 157-178.
[21] 张欣, 李术才. 爆破荷载作用下青岛胶州湾海底隧道覆盖岩层稳定性分析[J]. 岩石力学与工程学报, 2007(11): 2348-2355.
ZHANG Xin, LI Shucai. Stability analysis of rock cover of Qingdao kiaochow bay subsea tunnel under explosive loads[J]. Chinese Journal of Rock Mechanics and Engineering, 2007(11): 2348-2355.